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Service Manual -- JVC -- HM-HDS1U

1. 3 Press the channel buttons simultaneously to enter the manual tracking mode This also brings tracking to the center centre 4 Adjust the AUDIO OUT waveform and Control pulse waveform by turning the screws 1 2 and 3 little by little until both waveforms reach maximum The screw 1 and 3 are for adjustment of tilt and the screw 2 for azi muth Head base ed a Zei w SR o gt SOO Audio control head e Zi 3 j gt SIMI ARH AUDIO OUT Improper waveform variation Vu e Higher Lower j gt gt qm A y A y an y CTL P Fig 2 3 1c Fig 2 3 2a 2 3 3 Checking Adjustment of the Audio Control Head Improper Proper Phase X Value Sffstsffs KEN b Guide pole Fig 2 3 1d 2 3 2 Checking Adjustment of the Height and Tilt of the Audio Control Head
2. Max level Min level Proper waveform variation d IN Improper waveform variation Fig 2 3 1a Roller driver _ Guide roller supply side Fig 2 3 1b Level drop at the guide roller supply side c D Eis SS Level drop at the guide roller take up side Proper waveform variation Always flat
3. Pinch roller arm assembly Guide pole guard Fig 2 1 3d 2 1 4 Jigs and Tools Required for Adjustment Roller driver PTU94002 A C head positioning tool PTU94010 Torque gauge PUJ48075 2 y t Back tension cassette gauge PUJ48076 2 Jig RCU PTU94023B Alignment tape SP stairstep NTSC MHP Alignment tape LP stairstep NTSC MHP L 2 1 5 Maintenance and Inspection 1 Location of major mechanical parts In this chapter the two mechanism speeds are described by comparing the speeds of the standard type and the high speed FF REW type It is possible to distinguish between these two types of mechanism by the diameters of their capstan pulleys The capstan pulley diameter for the standard type is approx 32 mm The capstan pulley diameter for the high speed FF REW type is approx 43 mm For information on the different parts used in the two mechanism types please refer to the Replacement of major parts mi UV catcher2 supply and take up side Audio control head Kei Drum assembly O Head base 12 stator assembly o Sep O loj GAL o fe lO OJ A O i A Guide pole guard LIK O
4. Aloiemoizdioolel lelzazi0i zzib lbh l zlelomibita l zzlzazlb ib l zazlzzizzizziG lzazlzazlolbiei iG lGa lb l zlzazl zx ib lpa lralpalbaltalba wj jojjo jojo ajaja jajajajaja ajajaj ajajajaja a AE a AES a r ll SsIslslssslslsisgeislslsgsisleleieielelsgleieieleleieieleleiersglzs 9 PO PO 9 PY 1 Jy Pd I Py AlA A A A A A ASA jajaja alalalatalatalalatat ata DIDID D A H A O M H o NI NININININ N TN IN ININ IN co co co Table 2 1 5b Note e The parts with marked have different types of mecha nisms standard type or high speed FF REW type 1 Uses the standard type mechanism only 2 Uses the high speed FF REW type mechanism only 2 5 2 2 REPLACEMENT OF MAJOR PARTS 2 2 1 Before Starting Disassembling Phase matching between mechanical parts The mechanism of this unit is closely linked with the rotary encoder and system controller circuits Since the system controller detects the status of mechani cal operation in response to phases of the rotary encoder internal switch positions the mechanism may not operate properly unless such parts as the rotary encoder control plate loading arm gear co
5. 3 4 1 HDD EEY level 3 4 3 4 2 HDD PBY level 3 5 3 4 3 HDD PB C burst level 3 5 AUDIO CIRCUIT 3 5 1 Audio REC FM 3 6 DEMODULATOR CIRCUIT e 3 6 1 Input level 3 6 3 6 2 Stereo VCO 3 6 3 Stereo filter 3 6 4 Separation 1 3 6 5 Separation 2 3 6 6 SAP VCO 4 CHARTS AND DIAGRAMS NOTES OF SCHEMATIC DIAGRAM CIRCUIT BOARD NOTES nnnnn10 4 1 BOARD INTERCONNECTIONS 4 2 SWITCHING REGULATOR AND REGULATOR SCHEMATIC DIAGRAMS 4 5 4 3 VIDEO AUDIO SCHEMATIC DIAGRAM 4 4 SYSTEM CONTROL SCHEMATIC DIAGRAM 4 5 VIDEO UO SWITCH SCHEMATIC DIAGRAM 4 6 AUDIO I O SCHEMATIC DIAGRAM 4 7 CONNECTION SCHEMATIC DIAGRAM 4 8 TUNER SCHEMATIC DIAGRAM 4 9 3D DIGITAL 2M SCHEMATIC DIAGRAM 4 10 TERMINAL SCHEMATIC DIAGRAM 4 11 DEMODULATOR SCHEMATIC DIAGRAM 4 12 S SUB SCHEMATIC DIAGRAM 4 13 ON SCREEN SCHEMATIC DIAGRAM 4 4 14 EJECT SW DIAPLAY JACK LED SW AND LED SCHEMATIC DIAGRAMS 4 31 4 15 DIGITAL PSUP SCHEMATIC DIAGRAM 4 16 DIGITAL VIDEO SCHEMATIC DIAGRAM 4 17 DIGITAL AUDIO SCHEMATIC DIAGRAM 4 18 DIGITAL MPEG DEC SCHEMATIC DIAGRAM 4 19 DIGITAL MPEG ENC SCHEMATIC DIAGRAM aad 4 20 DIGITAL ASIC IF SCHEMATIC DIAGRAM n s s snsnssisinnsnsisissisisnsnsnnsnennnne 4 43 4 21 SWITCHING REGULATOR AND REGULATOR CIRCUIT BOARDS 4 22 3D DIGITAL 2M AND S SUB CIRCUIT BOARDS ns snsnsnnsissnenisisnnesieeenne 4 47 4 23 TERMINAL CIRCUIT DBOADD ecceccceeeecees seer eecsese
6. 2 2 18 Capstan Brake Assembly 2 13 2 2 19 Sub Brake Assembly take up side 2 13 2 2 20 Main Brake Assembly take up side Reel Disk take up side and Main Brake Assembly supply side 2 13 2 2 21 Tension Brake Assembly Reel Disk supply side and Tension Arm Assembly 2 14 2 2 22 Idler Lever Idler Arm Assembly ssesieeseeseeeeeeseeereereereeereereeneee 2 14 2 2 23 Stator Assembly 2 14 2 2 24 Rotor Assembly 2 2 25 Upper Drum Assembly 2 3 COMPATIBILITY ADJUSTMENT 2 3 1 Checking Adjustment of FM Waveform Linearity 2 3 2 Checking Adjustment of the Height and Tilt of the Audio Control Head G r 2 3 3 Checking Adjustment of the Audio Control Head Phase X Value 2 17 2 3 4 Checking Adjustment of the Standard Tracking Preset a 2 3 5 Checking Adjustment of the Tension Pole Position 3 ELECTRICAL ADJUSTMENT VHS Si PRECAUTION ee ot eu epee ann Sate eet yes eso 3 3 1 1 Required test equipments 3 1 2 Required adjustment tools 3 1 3 Color colour bar signal Color colour bar pattern 3 1 4 Switch settings and standard precautions 3 1 5 EVR Adjustment 3 2 SERVO CIRCUIT 3 2 1 Switching point 3 2 2 Slow tracking preset Section 3 3 VIDEO CIRCUIT 3 3 1 D A level 3 3 2 EEY level 3 3 3 PB Y level S VHS VHS 3 3 4 REC color colour level 3 3 5 Video EQ Frequency response 3 3 6 AUTO PICTURE initial setting i 3 4 DIGITAL CIRCUIT 3 4
7. onl Lid guide Fig 2 2 5a 2 2 6 Audio Control Head 1 How to remove 1 Remove the two screws A and remove the audio con trol head together with the head base 2 When replacing only the audio control head remove the three screws B while controlling the compression spring Audio control head Fig 2 2 6a Screws B Audio control head Compression Audio control head springs board assembly Head base Fig 2 2 6b 2 How to install 1 To make the post installation adjustment easier set the temporary level as indicated in Fig 2 2 6c Also make sure that the screw center centre is brought into alignment with the center centre position of the slot Head base A C head Screw D 12 4mm t Head base Audio control head Fig 2 2 6c 2 2 7 Loading Motor 1 How to remove 1 Remove the belt wound around the worm gear 2 Open the two lugs of the motor guide and remove the loading motor loading motor board assembly and motor guide altogether by pulling them up 3 When replacing the loading motor board assembly take care with the orientation of the loading motor Install so that the loading motor label faces upward 4 When the motor pulley has been replaced choose the fitting dimension as indicated in Fig 2 2 7a oading motor board assembly Loading motor AL C gt Lugs
8. CN5321 WR16 Foil side lt Note 2 gt Fig V3 L3 lt Note 4 gt Spacer Spacer lt Note 4 gt lt Note 4 gt Fig V2 Fig V4 1 5 Hard Disk Drive HDD Handling Precautions The HDD is a precision device for use in reading and writing a large amount of data on or from a disk rotating at a high speed If it is not handled carefully either abnormal opera tion may result or it may not be possible to read data The HDD is sensitive to the following items and special care is required in safeguarding against them when handling an HDD Also take care in handling a set incorporating an HDD 1 Hard disk drive assembly 2 Hard disk 3 Digital board assembly 1 7 HOW TO REMOVE THE MAJOR PARTS lt HDD section gt 1 7 1 Disassembly flow chart This flowchart shows the disassembly procedure for the ex terior parts and electrical parts Basically reverse this procedure when assembling them However it is required to remove the common section parts as far as Top cover and Front panel assembly in ad vance See section 1 5 Hard disk drive assembly y Gi Hard disk drive Y Si Digital board assembly 1 7 2 Dlsassembly assembly method HDD section gt Part name Fig No Point Note Hard disk drive H1 4 S5 lt Note 1 2 gt assembly CN5326 WR15 Hard disk drive H2 4 S11 Digital board H3 4 S5
9. 1 10 CONNECTION 1 11 EMERGENCY DISPLAY FUNCTION 1 H Get S VH aa a aa aa aa E o bGoOhMh h eOdoO4JMOeoe bb kb h l Za ch 1 1 11 1 Displaying the emergency information 1 11 2 Clearing the emergency history 1 11 3 Emergency content description 1 11 4 Emergency detail information 1 11 5 Emergency detail information 2 MECHANISM ADJUSTMENT VHS 2 1 BEFORE STARTING REPAIR AND ADJUSTMENT 2 1 2431 TEE 2 1 2 Checking for Proper Mechanical Operations 2 1 3 Manually Removing the Cassette Tape 2 1 4 Jigs and Tools Required for Adjustment 2 1 5 Maintenance and Inspection 2 2 REPLACEMENT OF MAJOR PARTS 2 2 1 Before Starting Disassembling Phase matching between mechanical parts 2 6 2 2 2 How to Set the Mechanism Assembling Mode X 2 2 3 Cassette Holder Assembly 2 2 4 Pinch Roller Arm Assembly 2 2 5 Guide Arm See and Press Lever Assembly 2 2 6 Audio Control Head ag 2 2 7 Loading Motor 2 2 8 Capstan Motor 2 2 9 Pole Base Assembly supply or take up side 2 2 10 Rotary Encoder 2 2 11 Clutch Unit 2 2 12 Change Lever Assembly 2 2 13 Link Lever 2 2 14 Cassette Gear Control Cam and Worm Gear a BAAD CON PIAS sap a a aaa a A aat 2 2 16 Loading Arm Gear supply or take up side and Loading Arm Gear Shaft 2 12 2 2 17 Take up Lever Take up Head and Control Plate Guide 2 13
10. E01 Loading EMG When the mechanism mode cannot be changed to an other mode even when the loading motor has rotated for more than 4 seconds in the loading direction E 01 is identified and the power is turned off The mechanism is locked in the middle of mode transition The mechanism is locked at the loading end due to the encoder position reading error during mode transition Power is not supplied to the loading MDA E02 Unloading EMG When the mechanism mode cannot be changed to an other mode even when the loading motor has rotated for more than 4 seconds in the unloading direction E 02 is identified and the power is turned off The mechanism is locked in the middle of mode transition The mechanism is locked at the unloading end due to the encoder posi tion reading error during mode transition Power is not supplied to the loading MDA E03 Take Up Reel Pulse EMG When the take up reel pulse has not been generated for more than 4 seconds in the capstan rotating mode E 03 is identified the pinch rollers are turned off and stopped and the power is turned off However the reel EMG is not detected in STILL SLOW modes The take up reel pulse is not generated in the FWD transport modes PLAY FWD SEARCH FF etc because 1 The idler gear is not meshed with the take up reel gear 2 The idler gear is meshed with the take up reel gear but incapable of wind ing due to too large mechanical lo
11. 2 2 24 Rotor Assembly 1 Remove the stator assembly 2 Remove the two screws B and remove the rotor assem bly Note e When installing the rotor assembly note that a normal picture cannot be obtained without ensuring the phase matching as mentioned below 3 Match the phases of the upper drum assembly and the rotor assembly as indicated in Fig 2 2 24a 4 Place the upper drum assembly hole a over the rotor assembly holes b with three holes to be aligned and tighten the two screws B See Fig 2 2 24a Screws B oe d Screw holes te ST e Ae Upper drum assembly The hole is not in line but is offset Rotor assembly toward the right Hole b Fig 2 2 24a 2 2 25 Upper Drum Assembly 1 How to remove 1 Remove the stator assembly and rotor assembly 2 Loosen the screw of the collar assembly using a 1 5 mm hexagonal wrench and remove the collar assembly Also remove the brush spring and cap at one time 3 Remove the upper drum assembly and remove the washer using tweezers Note e When replacement is required control the up down movement of the brush Never apply grease Collar Spring assembly 1 5mm O hexagonal wrench m Loosen f 2 4 N 4 Cap Upper drum assembly Fig 2 2 25a 2 How to install 1 Clean the coil parts of the lower drum assembly and the newly installed upper drum assembly wi
12. 6 Release the EVR mode of the VCR by transmitting the code F1 from the Jig RCU again When the EVR mode is released the adjusted data is memorized 7 Disconnect the short wire between the short point D2 and the GND Ground 3 7
13. 9 Install the door opener opener guide spring A and cas sette housing bracket and fasten the two slit washers Cassette holder assembly Lock lever R Drive arm Fig 2 2 3g Cassette holder assembly q 1 ku E Fig 2 2 3h Notches Guide hole Notch Relay gear JER g B Drive gear Limit gear Fig 2 2 3i 2 2 4 Pinch Roller Arm Assembly 1 How to remove 1 Remove the spring from the hook of the press lever as sembly 2 Remove the slit washer and remove the pinch roller seat 2 See Fig 2 2 4a 3 Remove the pinch roller arm assembly by pulling it up Slit washer Pinch roller seat2 7 S Spring Pinch roller arm assembly Press lever assembly Pinch roller arm assembly Fig 2 2 4a 2 2 5 Guide Arm Assembly and Press Lever Assembly 1 How to remove 1 Remove the spring and expand the lug of the lid guide in the arrow indicated direction Then remove the guide arm assembly by pulling it up 2 Remove the press lever assembly by pulling it up See Fig 2 2 5a Press lever d In assembly V Guide arm oi assembly Tension spring
14. Note es The bracketed WR of the connector symbol are as signed nos in priority order and do not correspond to those on the spare parts list 5 Adjustment information for installation 1 3 DISCONNECTION OF CONNECTORS WIRES 5 g Fig 1 3 1 Fig 1 3 2 a 4 ee ee Fig 1 3 3 Fig 1 3 4 Fig 1 3 5 1 4 SCREWS USED CABINET COMPONENTS AND BOARD ASSEMBLIES Table 1 4 1 below shows the symbols shapes colors and part numbers of screw that are used in the cabinet compo nents and board assemblies and are appearing in the disas sembling reassembling diagrams in this manual When screwing them again in reassembling be sure to use them correctly referring to the following table Notes e Screw that are asterisked marked with in the shape col umn are fixed with screw lock agent If such the screw is once removed never use it again e The Screw symbols are assigned nos in priority order and do not correspond to those on the spare parts list SYMBOL PARTS NO S1 QYTDST3006R SILVER BLACK S2 QYTDST3006M BLACK S3 QYTDSF3010Z GOLD S4 QYTDSF2606Z GOLD S5 QYTDST3006Z GOLD S6 QYTDST3005M GOLD S7 QYTDSF3008M BLACK S8 QYTDST2610Z GOLD S9 PQ40413 BLACK LP40700 001A BLACK QYTDSP2004Z GOLD COLOR Table 1 4 1 1 1 1 5 HOW TO REMOVE THE MAJOR PARTS lt COM section gt 1 5 1 Disassembly flow chart This flowchart shows the di
15. Table of MN tus mechanism operation mode sensor information of the Display Mechanism Operation Mode mechanism in the latest emergency can be confirmed based on 28 SoS standby eas without executing command 8 bok y occurrence the figure in EMG detail information 04 _ Moving to the adjacent position in the LOAD direction 06 Moving to the adjacent position in the UNLOAD direction FDP display 08 Cassette ejection being executed DA Cassette insertion being executed Al e 24 OC_ Tape being loaded OE Tape being unloaded 1 Deck operation mode at the moment of emergency 10 Mode transition to STOP with pinch roller compression ON 12 __ Mode transition to STOP with pinch roller compression OFF x2 Mechanism operation mode at the moment of emergency 14 Mode transition to STOP with pinch roller compression OFF as a result 3 Mechanism sensor information at the moment of emergency of POWER OFF E i iti 16 Mode transition to STOP with pinch roller compression ON as a result of 4 Mechanism mode position at the moment of emergency PONER ON Note 18 Mode transition to PLAY gt 1A_ Mode transition to FWD SEARCH e In the Deck operation mode Mechanism operation mode 1C Mode transition to REC Mechanism mode position the contents of the code that 1E_ Mode transition to FWD STILLISLOW is shown on the FDP differs depending on the parts SS Mode transiron to REV See number of the System Control microprocessor
16. an insulated mat that is placed on the mechanism VHS pga p assembly 4 Mount the HDD that was removed in 2 to its original position on the bottom chassis assembly and connect Hard disk drive the wires to the connector CN8001 on the digital board aed assembly and to the connector CN5326 on the regulator board assembly PATCH CORD Fig No Screw Hooks Connectors Note Digital board Page Nol etc No Geer Geo 1 Top cover COM1 9 2 1 0 Brackets 1 3 No 1 9 L1 L2 Front panel assembly 2 Frontpanel COM2 0 8 L3 j2 CN7507 assembly 1 3 CN3011 3 Hard disk drive HI A O 2 CN8001 Fig 1 8 2 Service position HDD side gt assembly 1 6 No 1 4 CN5326 4 Digital board H3 4 0o 0 assembly No 9 12 Table 1 8 3 Note The symbol numbers in the following table are special numbers indicating the service positions They do not coin cide with the symbol numbers used in Fig 1 10 1 1 10 or Table 1 10 1 1 11 SYMBOL CONNECTOR WIRE CONNECTIONS PIN No PATCH CORD DD MAIN CN7507 JACK CN7002 10 DD MAIN CN3011 DISPLAY CN7001 18 D TERMINAL CN703 DIGITAL CN8601 6 D 4 MAIN CN7508 REGULATOR CN5322 11 D MAIN CN7509 REGULATOR CN5321 15 oO MAIN CN2601 DIGITAL CN8801 8 D DD D MAIN CN3014 DIGITAL CN8
17. J BE Fig 2 2 3d Cassette holder assembly Drive arm Drive arm Fig 2 2 3f 2 How to install Phase matching 1 Insert the section of the drive arm into the section of the main deck 2 Insert the section CD of the drive gear into the round hole and the section into the square hole on the drive arm See Fig 2 2 3f 3 Hold the drive arm upright and fit the leg on the right side of the cassette holder assembly into the groove See Fig 2 2 3g 4 While swinging the lock lever R of the cassette holder assembly toward the front put the legs and into the rail See Fig 2 2 3g 5 Drop the three legs on the left side of the cassette holder assembly into the groove at one time See Fig 2 2 3h 6 Slide the whole cassette holder assembly toward the front to bring it to the eject end position 7 Install the limit gear so that the notch on the outer cir cumference of the limit gear is brought into alignment with the guide hole on the main deck See Fig 2 2 3i 8 Install so that the notch on the periphery of the relay gear is aligned with the notch of the main deck and that hole A of the relay gear is aligned with the hole A of the limit gear and that hole B of the relay gear is aligned with the hole B of the drive gear See Fig 2 2 3i
18. lt Note 3 4 gt assembly CN8901 WR8 CN8002 WR12 CN8601 WR13 CN8801 WR14 lt Note 1 gt With due regard to operational considerations remove the parts located on the frame Hard disk drive together be fore removing the major parts lt Note 2 gt When attaching the hard disk drive assembly be sure to connect the earth wire lt Note 3 gt e When connecting or disconnecting the connector or wire take care not to damage them e When connecting the flat wire to the connector be sure to connect it in the correct orientation lt Note 4 gt When removing the board assembly take care not to dam age it 1 6 Supporting tape side lt Note 3 gt Foil side lt Note 3 gt Fig H3 1 8 SERVICE POSITIONS The servicing locations for use in troubleshooting or servic ing of the set are provided separately for the VHS and HDD SERVICE POSITIONS lt VHS SIDE gt SERVICE POSITIONS lt HDD SIDE gt 1 8 1 Service position lt VHS SIDE gt lt Removal gt 1 Remove the top cover and bracket 2 Remove the front panel assembly 3 Remove the MAIN board assembly together with the mechanism assembly Fig No Page Screw Hook etc Connector Note 1 Top cover COM1 9 2 1 0 _ Bracket 1 3 No 1 9 L1 2 2 Front COM2 0 8 2 panel 1 3 L3 CN7507 assembly CN3011 3 Rear COM6 7 0 1 _ cover 1 3 No
19. replaced the audio control head drum assembly or any part of the tape transport system e To avoid any damage to the alignment tape while per forming the compatibility adjustment get a separate cassette tape for recording and play back ready to be used for checking the initial tape running behavior e Unless otherwise specified all measuring points and adjustment parts are located on the Main board e When using the Jig RCU set its custom code to match the custom code of the VCR Jig RCU Data transmitting method Depress the 3 B button after the data code is set CUSTOM CODE 43 00 INITIAL MODE 43 A CODE 53 B CODE TT DATA CODE Fig 2 3a Jig RCU PTU94023B 2 3 1 Checking Adjustment of FM Waveform Linearity Signal Alignment tape SP stairstep NTSC MHP e Alignment tape EP stairstep NTSC MHP L B PB C Oscilloscope Measuring point D e TP106 PB FM Mode lt Equipment ae es m External trigger e TP111 D FF e Guide roller Mechanism assembly e Flat V PB FM waveform Roller driver PTU94002 F G H Adjustment part lt Specified value Adjustment tool 1 Play back the alignment tape A1 2 Apply the external trigger signal to D FF E to observe the V PB FM waveform at the measuring point D 3 Press the channel buttons simultaneous
20. y aAA Motor guide LL Fig 2 2 7a 2 2 8 Capstan Motor 1 How to remove 1 Remove the belt capstan on the mechanism assembly back side 2 Remove the three screws A and remove the capstan motor Screws A KS Ces Screw A al Capstan motor Spacer ATN TS Spacer b CG Connector for the capstan motor Fig 2 2 8b 2 How to install Centering the mounting position When the capstan motor has once been removed and then reinstalled out of the initial correct position in the rotational direction the capstan motor current may be unstable during operation in high or low temperatures This may result in greater Wow amp Flutter and occasionally in power breakdown because of current over load Install the capstan motor while following the procedure given below The capstan motor is centrally located when the unit is shipped from the factory 1 Provisionally tighten the three screws A securing the capstan motor 2 Install the mechanism assembly to which the capstan motor is provisionally fastened on the bottom chassis which incorporates the Main board assembly No need to tighten the screws for mounting the mechanism Make sure that all the connectors for the mechanism as sembly and the Main board assembly are correctly in stalled as indicated in Fig 2 2 8b 3 Making sure that the connector for the capstan motor is correctly mounted and sec
21. 1 and remove the latter 2 Slide the control plate as indicated by the arrow and re move the control plate See Fig 2 2 15a Screw A Control bracket1 gt 4 Control plate Fig 2 2 15a 2 How to install Phase matching 1 Adjust the position of the idler arm assembly pin as indi cated in Fig 2 2 15b to the left of center centre of the R section 2 Bring the guide hole of the take up lever into alignment with the hole at the control plate guide and fix the posi tion by inserting a 1 5 mm hexagonal wrench 3 Install the control plate so that the section A of the load ing arm gear shaft fits into the hole A of the control plate the section B of the control plate guide into the hole B and the control plate comes under the section C of the rotary encoder guide and the section D of the loading arm gear shaft while press fit the pole base assmebly sup ply side as indicated by the arrow It is important that the tension arm assembly shaft is positioned closer to ward you than the control plate See Fig 2 2 15c 4 Make sure that the mark E of the control plate is in align ment with the mark of the loading arm gear shaft See Fig 2 2 15c 5 Pull off the hexagonal wrench for positioning 3 Turn the loading arm gear take up side clockwise so that the notch of the loading arm gear take up side is in alignment with the projection of the
22. 2 Record the signal A2 in the mode B1 and play back the recorded signal 3 Press the channel buttons simultaneously to enter the manual tracking mode This also brings tracking to the center centre 4 Set the VCR to the EVR mode by transmitting the code F1 from the Jig RCU 5 Set the EVR address to F2 by pressing the button of the digit key remote controller 6 Adjust with the channel buttons on the VCR or on the remote controller so that the Y level of the Y OUT waveform becomes the specified value G 7 Release the EVR mode of the VCR by transmitting the code F1 from the Jig RCU again When the EVR mode is released the adjusted data is memorized 8 Repeat steps 2 to 7 in the mode B2 Fig 3 3 3a PB Y level 3 3 4 REC color colour level Signal A1 Alignment tape S VHS SP EP Color colour bar MH 1H A2 Ext input A3 e Color colour bar signal NTSC Mode B1 S VHS SP B2 S VHS EP Equipment C Oscilloscope Measuring point D1 TP106 PB FM D2 PB color colour output of the LPF External trigger E e TP111 D FF EVR mode F1 Jig RCU Code 57 EVR address F2 A 02 Press remote controller 0 and 2 keys e SP B x 125 5 EP B x 125 5 Specified value G Adjustment tool H1 Jig RCU PTU94023B H2
23. 28 35 CN5325 4 Main V2 V3 if 0 5 board 1 6 No 4 10 CN5321 assembly CN5322 etc CN3014 CN703 CN2601 Table 1 8 1 lt Installation gt 1 Stand up the bottom chassis assembly so that the Regu lator side is in the lower position 2 Connect the PATCH CORD to the three FPCs then con nect CN3014 CN7508 and CN7509 3 By connecting a total of two FPCs and wires CN703 CN2601 carry out the installation so that the Main board assembly comes in the upper position Point Take care that the FPCs and wires are not subjected to stress in this positioning 4 Connect the PATCH CORDS to the two FPCs of the front panel assembly then connect the CORDS to the CN7507 CN301 1 For the PATCH CORD is required see Table 1 8 2 Board to Board WIRE PTU94022 10 QUQ112 1040CG PTU94022 18 QUQ112 1840CG PTU94022 11 QUQ212 1140CG PTU94022 15 QUQ212 1540CG YTU94072 06 QUQ210 0640CG ue fleck Table 1 8 2 PATCH CORD PTU94017B _ Main board assembly CN2601 CN5321 Fig 1 8 1 Service position lt VHS side gt 1 7 1 8 2 Service position HDD side gt 1 Remove the exterior parts Top cover and front panel as sembly 2 Remove the hard disk drive HDD together with the frame 3 Remove the digital board assembly together with the wires PE attached to it and place the assembly upside down on
24. 4 and 5 then set the A C head positioning tool to the innermost projected part of the A C head See Fig 2 3 3a 5 Turn the A C head positioning tool fully toward the cap stan Then turn it back gradually toward the drum and stop on the second peak point position of the V PB FM waveform output level Then tighten the screws 4 and 5 6 Perform the tracking operation and make sure that the V PB FM waveform is at its maximum If it is not at maximum loosen the screws 4 and 5 and turn the A C head positioning tool to bring the A C head to a position around where the waveform reaches its maximum for the first time Then tighten the screws 4 and 5 Perform adjustment steps 7 to 10 only for 2 Head models equipped with LP mode 7 Then play back the alignment tape A2 8 Press the channel buttons simultaneously to enter the manual tracking mode This also brings tracking to the center centre 9 Perform the tracking operation and make sure that the V PB FM waveform is at its maximum 10 If it is not at maximum loosen the screws 4 and 5 and turn the A C head positioning tool to bring the A C head to a position around where the waveform reaches its maximum for the first time Then tighten the screws 4 and 5 Note e After adjusting always perform the confirmation and re adjustment of the item 2 3 4 Les Toward the capstan Toward the drum Q _Head base AIC head positioning to
25. A S Sub board assembly LEVEL ADJ Demodulator board assembly TP4001 CTL P On screen TP111 D 8 QUQ112 1840CG D FF VHS mechanism CN3011 CN7507 le Supporting tape side PATCH CORD PATCH CORD PTU94022 16 QUQ112 1640CG E TP7001 O ECET Display board assembly TPGND ape se e EEN FE EE lomo lon Ge r LED aw OJ O o board assembly pL ES LED board assembly Eject SW board assembly lt Front panel assembly gt Fig 1 9 1 1 9 1 10 CONNECTION TOP VIEW Treat wire so as not to come to the FAN motor FAN motor CN5301 Lower CN512 CN703 Supporting tape side CN7506 fi 16 crease CN8002 H CN8201 _CN8202 DETAIL A DRUM Absorb the looseness of the wire in the B part DETAIL B Main board assembly CL e _ C Base 1 N Treat the front wires according to the figure Make a CN7508 J Treat the wire r SET 3 according to the Supporting So Foil side figure not to Make a tape side oo 2 Se elie overlap in TP crease d I N2001 CN3001 oD Tal Resor sy A Ee FIAT gt Foil side CN5323 SY Make a crease Middle cont DRUM RN D Supporting N53
26. A i VI marker D2 ST Specified J value G j DN DAU V rate Fig 3 3 5a Video EQ Frequency Response 3 3 6 AUTO PICTURE initial setting Signal A1 Ext input A2 Video Optional A3 VHS tape Mode B EE Auto adjust SP EP REC PB Adjustment part F e Jig RCU Code 58 Specified value G STOP mode Adjustment tool H e Jig RCU PTU94023B 1 Insert the cassette tape A3 2 Set the VCR to the Auto adjust mode by transmitting the code F from the Jig RCU When the VCR enters the stop mode the adjustment is completed When the VCR enters the eject mode repeat steps 1 to 2 again 3 4 DIGITAL CIRCUIT Note e When performing this adjustment set the VCR to the HDD mode 3 4 1 HDD EE Y level Signal A1 Ext input A2 Color colour bar signal NTSC Mode B EE Equipment C Oscilloscope Measuring point D TP701 D AGC 1 Apply the external trigger signal to D FF E to observe the Y OUT waveform at the measuring point D1 2 Record the signal A2 in the mode B1 and play back the recorded signal 3 Press the channel buttons simultaneously to enter the manual tracking mode This also brings tracking to the center centre 4 Set the VCR to the EVR mode by
27. Digit key remote controller H3 LPF PTU93006 See Fig 3 3 4a 1kQ 39pH 180 pH mM MA O 629 kHz 1 1 PB COLOR 20pF T180 pF PB COLOUR PB FM O Fig 3 3 4a LPF 1 Connect the adjustment tool H3 to the measuring point D1 2 Apply the external trigger signal to D FF E to observe the PB color colour waveform at the measuring point D2 3 Play back the signal A3 in the mode B1 of the align ment tape A1 4 Press the channel buttons simultaneously to enter the manual tracking mode This also brings tracking to the center centre 5 Adjust tracking by pressing the channel buttons so that the PB color colour waveform becomes maximum Make a note of the higher PB color colour level as B at this time 6 Record the signal A3 in the mode B1 and play back the recorded signal 7 Set the VCR to the EVR mode by transmitting the code F1 from the Jig RCU 8 Set the EVR address to F2 by pressing the button of the digit key remote controller 9 Adjust with the channel buttons on the VCR or on the remote controller so that the higher level channel be comes the specified value G of the note B level as shown in Fig 3 3 4b Adjust before recording then con firm it by playing back 3 3 10 After adjustment record the signal A3 then playing it back again At this time confirm that there is no invert ing phenomeno
28. F1 Jig RCU Code 57 EVR address F2 A 30 Press remote controller 3 and 0 keys Specified value G1 500 100 mVp p G2 More than 350 mVp p Adjustment tool H Jig RCU PTU94023B e Digit key remote controller 1 Apply the external trigger signal to D FF E to observe the Audio PB FM waveform at the measuring point D 2 Record the signal A3 with no audio signal input in the mode B and play back the recorded signal 3 Press the channel buttons simultaneously to enter the manual tracking mode This also brings tracking to the center centre 4 If the A PB FM level is not within the specified value G1 perform the adjustment in a following procedure 5 Set the VCR to the EVR mode by transmitting the code F1 from the Jig RCU 6 Set the EVR address to F2 by pressing the button of the digit key remote controller 7 Adjust with the channel buttons on the VCR or on the remote controller so that the A PB FM level of the higher channel level becomes the specified value G1 Adjust before recording then confirm it by playing back 8 If the specified value G1 is not obtained adjust with the channel buttons so that the waveform level of the lower channel level becomes the specified value G2 Adjust before recording then confirm it by playing back 9 Release the EVR mode
29. IC3001 24 Mode transition from FE REW to STOP of the VCR 26 Mode transition to FF j P 28 Mode transition to REW rere NCL ORIOC Eee parts number tial stants wit ine 2A _ 4 sec of REV as a result of END sensor going ON during loading two letters MN refer to the Table of MN and for parts 2C_ Short FF REV as a result of tape sensor going ON during unloading number with HD refer to the Table of HD 2E Mechanism position being corrected due to overrun 80 Mechanism in initial position Dummy command 1 Deck Operation Mode Table of HD Table of MN Display Mechanism Operation Mode Display Deck Operation Mode 00 STOP with pinch roller pressure off 00 Mechanism being initialized 01 STOP with pinch roller pressure on 01 STOP with pinch roller pressure off or tape present with P OFF 02 U L STOP or tape being loaded 02 STOP with pinch roller pressure on 04 PLAY l 03 POWER OFF as a result of EMG 05 PLAY x1 speed playback using JOG 04 PLAY OE REC 0C REC 11 Cassette ejected 10 Cassette ejected 22 FF i i 20 FF 26 FWD SEARCH variable speed including x2 speed 21 Tape fully loaded START sensor ON short FF 2E_ INSERT REC 22 Cassette identification FWD SEARCH before transition to FF SP x7 speed 43 REW 24 FWD SEARCH variable speed including x2 speed 47 _ REV SEARCH 2C INSERT REC 4C_ AUDIO DUB 40 REW 6E _ INSERT REC VIDEO AUDIO 42 Cassette identification REV SEARCH before transition
30. Jig CONN CABLE Table 1 10 1 Connection 1 11 EMERGENCY DISPLAY FUNCTION This unit has a function for storing the history of the past two emergencies EMG and displaying them on each FDP With the status of the VCR and mechanism at the moment an emer gency occurred can also be confirmed FDP display switching DV m gt FDP display Normal display M E x Emergency content display E Latest Previous M E x Emergency content display E Latest Previous VHS m gt FDP display 0 00 00 Normal display E zi sn Emergency content display E Latest Previous 1 2 34 Emergency detail display Y 5 x6 7 Emergency detail display Notes e The emergency detail display show the information on the latest emergency It becomes when there is no latest emer gency record e When using the Jig RCU set its custom code to match the custom code of the VCR Jig RCU Data transmitting method Depress the 3 B button after the data code is set K 00 43 00 INITIAL MODE CUSTOM CODE 43 A CODE 53 B CODE DATA CODE Fig 1 11 1 Jig RCU PTU94023B 1 11 1 Displaying the emergency information 1 Transmit the code 59 from the Jig RCU The FDP shows the emergency content in the form of Erk wie ke Example 1 E 01 03 t Previous emergency Latest emergency Example 2 E
31. Note e Set a temporary level of the height of the A C head in advance to make the adjustment easier after the A C head has been replaced See Fig 2 2 6c Signal A e Alignment tape SP stairstep NTSC MHP Mode B PB Equipment C Oscilloscope Measuring point D1 AUDIO OUT terminal D2 TP4001 CTL P External trigger E e TP111 D FF F A C head Mechanism assembly G Maximum waveform Adjustment part Specified value 1 Play back the alignment tape A 2 Apply the external trigger signal to D FF E to observe the AUDIO OUT waveform and Control pulse waveform at the measuring points D1 and D2 in the ALT mode Signal A1 Alignment tape SP stairstep NTSC MHP Mode B PB Equipment C Oscilloscope Measuring point D e TP106 PB FM External trigger E e TP111 D FF lt A C head base Mechanism assembly Specified value G e Maximum V PB FM waveform H Adjustment part F Adjustment tool A C head positioning tool PTU94010 1 Play back the alignment tape A1 2 Apply the external trigger signal to D FF E to observe the V PB FM waveform at the measuring point D 3 Press the channel buttons simultaneously to enter the manual tracking mode This also brings tracking to the center centre 4 Loosen the screws
32. Pe t gt t Control plate Brush xO Tension brake assembly O O Other OIO Rotary encoder x Cleaning CH Inspection or Replacement if necessary Table 2 1 5a 5 Disassembling procedure table The following table indicates the order in which parts are re moved for replacement To replace parts remove them in the order of 1 to 18 as shown in the table To install them reverse the removal sequence The symbols and numbers preceding the individual part names represent the numbers in the Location of major me chanical parts table Also the T B and T B on the right of each part name shows that the particular part is removed from the front from the back and from both sides of the mechanism respectively w a w Ki Symbols and numbers Removal parts Reference items Replacement parts Front T Back B of mechanism Loading arm gear supply side Loading arm gear take up side Sub brake assembly take up side Main brake assembly take up side Symbols and numbers Number of removal steps Guide rail Roller cam assembly Cassette housing bracket Opener guide Relay gear Cassette holder assembly Drive gear Drive arm Pinch roller arm assembly Guide arm assembly Press lever assembly UV catcher2 Rotary encoder Clutch unit Change lever assembly Direct gear Coupling gear Link lever Worm gear Control bracket1 Control plate Take up
33. adjust mode by transmitting the code F twice from the Jig RCU When the VCR enters the stop mode the adjustment is completed 5 If the VCR enters the eject mode perform adjustment for the audio control head phase X value again 2 3 5 Checking Adjustment of the Tension Pole Position Signal A Back tension cassette gauge PUJ48076 2 Mode B e PB Adjustment part F e Adjust pin Mechansim assembly Specified value G 25 51 gfecm 2 45 5 x 103 Nm 1 Play back the back tension cassette gauge A 2 Check that the indicated value on the left side gauge is within the specified value G 3 If the indicated value is not within the specified value G perform the adjustment in a following procedure 1 Set the VCR to the mechanism service mode See 1 5 MECHANISM SERVICE MODE 2 Set the VCR to the play back mode and adjust by turn ing adjustment pin to align the tension arm assembly edge with the main deck hole A on the right edge marker See Fig 2 3 5a Tension arm assembly Mechanism Timing Chart Mechanism mode EJECT tai CASS INS FFIREW STOP REV SLOWISTILL PLAY Control plate mark E U Cl FR ST R SL P Rotary encoder Control cam angle Rot
34. h i Full erase head H Se SS Lid guide aU mi Press lever K i Pole base assembly Si HI assembly supply side Y C A SS sf D s id b 0 uide arm SS ml h assembly Tension arm f o assembly T H E Reel disk h A A V S _ h take up side K Adjust pin mg 5 53 j Sub brake assembly take up side D Tension brake jj a assembly i h Reel disk Main brake assembly 69 dls j take up side j D poly side mg Idler lever Idler arm assembly l d Rec safety lever ki Main brake assembly mo Pole base assembly take up side supply side Fig 2 1 5a Mechanism assembly top side Capst te Capstan brake E Loading arm gear supply side aps motor apst zi rake assembly Belt capstan Loading arm gear take up side i nu e l Plate Lo S feo o d CO supply side T Le o gt Belt j N KP loading motor o B7 Control OPN 8 SC racket O O C f bracket oD E kel 68 Control plate I s Tension arm bearing Brake lever Nees VE of Cassette Be of ED Link lever a Rotary encoder dh P Direct gear Take up head Take up lever Rotary encoder guide Sheng
35. jacks earphone jacks etc See table 1 below Dielectric strength test Confirm specified dielectric strength or greater between power cord plug prongs and exposed acces sible parts of the set RF terminals antenna terminals video and audio input and output terminals microphone jacks earphone jacks etc See table 1 below Clearance distance When replacing primary circuit components confirm specified clearance distance d d be tween soldered terminals and between terminals and surrounding metallic parts See table 1 below Chassis Power cord primary wire Fig 8 Leakage current test Confirm specified or lower leakage current between earth ground power cord plug prongs and externally exposed accessible parts RF terminals antenna terminals video and audio input and output terminals microphone jacks earphone jacks etc Measuring Method Power ON Insert load Z between earth ground power cord plug prongs and externally exposed accessible Externally parts Use an AC voltmeter to measure across both terminals of load Z See figure 9 and following exposed table 2 accessible part Fig 9 Grounding Class 1 model only Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts Video in Video out Audio in Audio out or Fixing screw etc Measuring Method Connect milli onm meter between earth pin in AC inlet and exp
36. of the VCR by transmitting the code F1 from the Jig RCU again When the EVR mode is released the adjusted data is memorized Specified value G1 value G2 Specified V rate Fig 3 5 1a Audio REC FM 3 5 3 6 DEMODULATOR CIRCUIT Notes e Unless otherwise specified in this demod circuit ad justments all measuring points and adjustment parts are located on the Demod board e Unless otherwise specified set an audio multiplex TV signal generator as follows FF signal 70 dBu 759 color bar 87 5 modulation 3 6 1 Input level 3 Set the VCR to the EVR mode by transmitting the code F1 from the Jig RCU 4 Set the EVR address to F2 by pressing the button of the digit key remote controller 5 Adjust with the channel buttons on the VCR or on the remote controller so that the frequency of the meas uring point D1 becomes the specified value G 6 Release the EVR mode of the VCR by transmitting the code F1 from the Jig RCU again When the EVR mode is released the adjusted data is memorized 7 Disconnect the short wire between the short point D2 1 S
37. reach the System controller CPU because 2 the signal circuit is disconnected in the middle 2 Power is not supplied to the capstan MDA E07 SW Power Short Circuit EMG When short circuiting of the SW power supply with GND has lasted for 0 5 second or more E 07 is identified all the motors are stopped and the power is turned off The FG pulse generator MR device of the capstans is faulty e capstan control voltage CAPSTAN CTL V is not supplied to the MDA OD The SW5V The SW 12 ower supply circuit is shorted with GND power supply circuit is shorted with GND E08 HDD Communica tion EMG When the KBUS_DATA signal did not reach the pin 46 of the System controller CH NEEN on the main board assembly E 08 is identified POWER ON operation is rejected HDD is defective E09 DD FG EMG When the DD FG pulse is not generated within 2 5 sec onds E 09 is identified the tilt motor is stopped and the power is turned off KBUS_DATA signal is disconnected in the middle 2 The FG sensor is defective The soldered parts have separated The pull up resistor at the FG sensor output is defective The soldered parts have separated Contact failure or soldering failure of the pins of the connector board to board to the FG sensor The power to the sensor is not supplied Connection failure soldering failure The FG pulse is not sent to the System Controller CPU The tilt motor is defecti
38. to REW SP x7 speed 84 FWD STILL SLOW 44 REV SEARCH variable speed 85_ REV STILL SLOW AC AUDIO DUB 8F_ REC PAUSE 6C__ INSERT REC VIDEO AUDIO AF INSERT REC PAUSE 84 FWD STILL ISLOW C7_ REV SEARCH x1 speed reverse playback using JOG 85 REV STILL SLOW CD AUDIO DUB PAUSE SC REC PAUSE EF INSERT REC VIDEO AUDIO PAUSE 8D Back spacing FO _ Mechanism being initialized SE Forward spacing FWD transport mode with BEST function F1 _ POWER OFF as a result of EMG AC INSERT REC PAUSE P Cassette being inserted AD INSERT REC Back spacing F3 Cassette being ejected CC AUDIO DUB PAUSE F4 Transition from STOP with pinch roller pressure on to STOP with pinch z roller pressure off cD INSERT REC VIDEO AUDIO PAUSE F5 Transition from STOP with pinch roller pressure on to PLAY F6 Transition from STOP with pinch roller pressure on to REC ED INSERT REC VIDEO H AUDIO Back spacing F7_ Cassette type detection SEARCH before FF REW is being executed F8 Tape being unloaded Table of HD F9 Transition from STOP with pinch roller pressure off to STOP with pinch Display Deck Operation Mode roller pressure on 00 STOP with pinch roller pressure off or tape present with P OFF FA Transition from STOP with pinch roller pressure off to FF REW 01 STOP with pinch roller pressure on FB ransition from STOP with pinch roller pressure off to REC P T REC etc 04 PLAY FC Transition from STOP with pinch roller pressure off to ca
39. 002 6 D DIGITAL CN8001 HARD DISK DRIVE 40 D REGULATOR CN5326 HARD DISK DRIVE 4 3 D REGULATOR CN5323 DIGITAL CN8901 9 Table 1 8 4 Connection of Connectors 1 8 1 9 MECHANISM SERVICE MODE This model has a unique function to enter the mechanism 5 With lock levers on the left and right of the Cassette into every operation mode without loading of any cassette tape This function is called the MECHANISM SERVICE MODE 1 9 1 How to set the MECHANISM SERVICE MODE 1 Disconnect VCR from AC holder assembly pulled toward the front slide the holder in the same direction as the cassette insertion direction For the positions of lock levers A refer to the Pro cedures for Lowering the Cassette holder assembly on page 1 5 of 1 6 HOW TO REMOVE THE MAJOR PARTS lt VHS section gt 2 Connect TPGND and TP7001 TEST on the Display 6 The cassette holder lowers and when the loading has board assembly with a jump wire 3 Connect VCR to AC 4 Press the POWER button completed the mechanism enters the desired mode Fan motor Regulator board assembly Swithing regulator board assembly Hard disk drive HDD TP701 TPGND 3 D SE doa assembly Terminal board assembly 3D Digital Main board assembly e IM beard IW assembly VR401 D
40. 23 Large ree T 5 23 24 Large reel T 10 25 26 Large reel T 20 27 29 Large reel T 30 29 2B Large reel T 40 2D 2F Large reel T 60 Note e The values of cassette tape type in the above table are typical values with representative cassette tapes 1 15 SECTION 2 MECHANISM ADJUSTMENT VHS 2 1 BEFORE STARTING REPAIR AND ADJUSTMENT 2 1 1 Precautions 1 Unplug the power cable of the main unit before using your soldering iron 2 Take care not to cause any damage to the conductor wires when plugging and unplugging the connectors 3 Do not randomly handle the parts without identifying where the trouble is 4 Exercise enough care not to damage the lugs etc dur ing the repair work 5 When installing the front panel assembly be sure to hook the lug on the back side of the cassette door to the door opener of the cassette holder If this operation is ne glected it will not be possible to remove the cassette when ejecting because the housing door cannot be opened 2 1 2 Checking for Proper Mechanical Operations Enter the mechanism service mode when you want to oper ate the mechanism when no cassette is loaded See 1 5 MECHANISM SERVICE MODE 2 1 3 Manually Removing the Cassette Tape 1 In case of electrical failures If you cannot remove the cassette tape which is loaded be cause of any electrical failure manually remove it by taking the following steps 1 Unplug the pow
41. 26 Oo Q tape side Upper x ve S di G 2 Foil side f NIAS E Should be confirmed that wire H aj not touch to IC of the Stator be CN8801 board assembly CN8601 d TIP a LA st Foil side 5 ise Z O CN3011 __ CN7507 DETAIL C pene CN3014 Main board assembly Treat the wire through the hole DETAIL D HDD ua Frame The excessive length portion of wire should be treat as figure D Digital board CN8001 assembly The wire should be does not touch from edge O O Foil side Lo a B CAUTION Insert the FPC wires as shown below Foil side Supporting tape side Fig 1 10 1 Top view Connection zim Oe Connected point Connected point MAIN CN7507 JACK CN7002 MAIN CN3011 DISPLAY CN7001 REGULATOR CN5301 SW REG CN5201 REGULATOR CN5322 MAIN CN7508 REGULATOR CN5321 MAIN CN7509 REGULATOR CN5325 FAN MOTOR REGULATOR CN5326 HDD REGULATOR CN5323 DIGITAL CN8901 DRUM MOTOR CON1 MAIN CN3001 MAIN CN UPPER DRUM A C HEAD CN MAIN CN2001 MAIN CN3014 DIGITAL CN8002 MAIN CN703 DIGITAL CN8601 MAIN CN2601 DIGITAL CN8801 DIGITAL CN8001 HDD O E B 45 MAIN CN7506 S SUB Leif E die Be IA E E E ar EE DIGITAL CN8201 Jig CONN CABLE DIGITAL CN8202 J
42. 35 gt e gt Di OS x s cg 2 3 s s 5 s a x 8 lt 8 E 100 IRE a Burst S 2 1S 6 2 clo 1v _ 40 IRE 40 IRE a i o ie j Black Horizontal sync 3 1 4 Switch settings and standard precautions The SW settings of the VCR and the standard precautions for the electrical adjustments are as follows e When using the Jig RCU set its custom code to match the custom code of the VCR VIDEO NAVIGATION TAPE MANAGER OFF e Unless otherwise specified all measuring points and adjustment parts are located on the Main board e In the Signal column of the adjustment chart Ext S input means the Y C separated video signal and Ext input means the composite video signal input 3 1 5 EVR Adjustment Some of the electrical adjustments require the adjustment performed by the EVR system The Main board assembly have EEPROMs for storing the EVR adjustment data and user setups Notes e In the EVR adjustment mode the value is varied with the channel buttons The adjusted data is stored when the setting mode changes from PB to STOP when the tape speed is changed etc Take care to identify the current mode of each adjustment item when making an adjustment e When changing the address setting in the EVR adjust ment mode use the Jig RCU or the remote controller having numeric keypad with which a numeric code can be directly input The remote control code of the Jig RCU corres
43. 5 mm 17 1 16 x 4 15 16 x 15 3 16 7 4 kg 16 4 Ibs RCA connectors IN x 1 OUT x 2 S Video connectors IN x 1 OUT x 2 HDD DECK VIDEO AUDIO Video format Audio format MPEG2 VBR MPEG Layer2 Maximum recording time SP LP EP SEP 14 hours 20 hours 28 hours 40 hours VHS DECK VIDEO AUDIO Signal system Recording system Format Signal to noise ratio Horizontal resolution Frequency range NTSC type colour signal and EIA monochrome signal 525 lines 60 fields DA4 Double Azimuth head helical scan system S VHS VHS NTSC standard 45 dB 240 lines VHS 400 lines S VHS 70 Hz to 10 000 Hz Normal audio 20 Hz to 20 000 Hz Hi Fi audio Maximum recording time SP EP 210 min with ST 210 video cassette 630 min with ST 210 video cassette Clock reference Program capacity Memory backup time ACCESSORIES Provided accessories Quartz 1 year programmable timer 16 programs each on the VHS and HDD deck Approx 60 min RF cable F type Infrared remote control unit AA battery x 2 Audio Video Cable S Video cable 4 pin Controller Specifications shown are for SP mode unless otherwise specified E amp O E Design and specifications subject to change without notice Printed in Japan This service manual is printed on 100 recycled paper COPYRIGHT 2001 VICTOR COMPANY OF JAPAN LTD No
44. 82853 April 2001 Hard Disk Drive HDD 1 Hard Disk Drive HDD Handling Precautions The HDD is a precision device for use in reading and writing a large amount of data on or from a disk rotating at a high speed If it is not handled carefully either abnormal operation may result or it may not be possible to read data The HDD is sensitive to the following items and special care is required in safeguarding against them when handling an HDD Also take care in handling a set incorporating an HDD 1 Vibrations and impacts 2 Static electricity 3 Rough handling 1 1 Handling in transport etc e Be sure to place the HDD in the manufacturer s specified package carton before transport e When receiving a package containing an HDD check that the pack HDD age carton is not damaged such as having holes in the carton Do not throw or crushed corners etc drop packages e Do not impact the packaging carton when loading or unloading it It is not permitted to use the inner package carton only for transport ing an HDD Be sure to package and e Do not stack package cartons one upon another transport the HDDs correctly 1 2 Handling an HDD in the stand alone status e When handling an HDD on a hard workbench place an antistatic mat rubber sheet or similar object on the hard surface to prevent n ee any impacts occurring between the HDD and bench Ke wA e Do not stack the HDDs one upon another om Te e Do not knock an H
45. DD with a hard object such as a screwdriver e Do not place an HDD on its side panel without using a support do not place an HDD in an unstable position 1 3 Handling the installation of an HDD e Place antistatic mats or similar sheets on all of the surfaces on which work is conducted or when the HDD is transported e Do not permit the HDD to knock against the set s brackets e When screwing the brackets be careful not to knock the HDD When using a power screwdriver use a low shock model and arrange the tightening torque properly e When mounting an HDD in a HDD VHS DUAL RECORDER take care not to apply excessive force to the brackets 2 In Case of an HDD Failure When a HDD VHS DUAL RECORDER AC cord is plugged into a power outlet the boot loader is read from the IC8204 8M FLASH ROM which activates the HDD and reads the system files in the HDD before getting ready for operation In consequence the computer cannot be turned on if the HDD fails In case a failure of the HDD is in doubt use the following procedure to switch the main power of the set ON using the VHS section alone by bypassing the HDD operation check 1 With the HDD VHS DUAL RECORDER in the remote control standby status transmit code 7b from the remote jig for more than 2 seconds 2 The REC LINK button on the computer blinks indicating that the power supply can be switched ON 3 When the code 7B is transmitted again from the remote jig the but
46. HS side FPCs below the base 1 lt Note 4 gt When removing the SW REG board assembly or Regula tor board assembly unhook the several spacers connect ing it with pliers from the top side lt Note 5 gt Perform the work by leaving fan motor attached to the rear cover except when replacing the fan motor When attaching the rear cover please be careful with the wiring 1 2 L3 Digital board assembly Base 1 Supporing tape side Fig COM2 Eject SW x board assembly Jack X board assembly 5 LED SW NS board assembl Kee y d LED board assembly j assembly CN5325 CN5321 CN5322 WPS WR4 Foil side CN5323 Foil side lt Note 1 gt lt Note 4 gt lt Note 4 gt Fig COM3 Fig COM5 26 ee WR3 d 27 Supporting tape side E lt Note 1 gt oo a K Ze 2 lt Note 5 gt Fan motor wi Spacer lt Note 5 gt Fig COM4 Fig COM6 1 6 HOW TO REMOVE THE MAJOR PARTS lt VHS section gt 1 6 1 Disassembly flow chart This flowchart shows the disassembly procedure for the ex terior parts and electrical parts Basically reverse this procedure when assembling them However it is required to remove the common section parts as far as Top cover Bracket and Front panel assem bly in advance See section 1 5 Drum assembly Y M
47. JVC SERVICE amp ENGINEERING COMPANY OF AMERICA DIVISION OF JVC AMERICAS CORP Head office 10 New Maple Avenue Pine Brook New Jersey 07058 9641 705 Enterprise Street Aurora Illinois 60504 8149 East Coast Midwest West Coast 1500 Lakes Parkway Lawrenceville Georgia 30043 5857 2969 Mapunapuna Place Honolulu Hawaii 96819 2040 Atlanta Hawaii Head office 16800 Rte Trans Canadienne Kirkland Quebec HOH 5G7 13040 Worster Court Richmond B C V6V 2B3 Montreal Vancouver 1700 Valley Road Wayne New Jersey 07470 9976 5665 Corporate Avenue Cypress California 90630 0024 JVC CANADA INC 21 Finchdene Square Scarborough Ontario M1X 1A7 973 315 5000 973 396 1000 630 851 7855 714 229 8011 770 339 2582 808 833 5828 416 293 1311 514 871 1311 604 270 1311 40895 03 JAF NtSQH WH S9828 ON SERVICE MANUAL JVC HDD VHS DUAL RECORDER HM HDS1U SVIS EE wett Super VHS ET SPECIFICATIONS GENERAL TUNER Power requirement AC 120 V 60 Hz Tuning system Frequency synthesized tuner Power consumption Channel coverage Power on 45 W VHF Channels 2 13 Power off 14 W UHF Channels 14 69 Temperature CATV 113 Channels Operating 5 C to 40 C 41 F to 104 F Storage 20 C to 60 C 4 F to 140 F TIMER Operating position Dimensions WxHxD Weight Input Output Horizontal only 435 mm x 124 mm x 38
48. ND Ground 2 Connect the equipment C to the measuring point D1 3 6 e Minimum level e Jig RCU PTU94023B e Digit key remote controller Specified value G Adjustment tool H 1 Set an audio signal mode of the RF signal generator to alternate L ch 300 Hz 14 modulated 2 Connect the equipment C to the measuring point D 3 Set the VCR to the EVR mode by transmitting the code F1 from the Jig RCU 4 Set the EVR address to F2 by pressing the button of the digit key remote controller 5 Adjust with the channel buttons on the VCR or on the remote controller so that the level of the measuring point D becomes the specified value G 6 Release the EVR mode of the VCR by transmitting the code F1 from the Jig RCU again When the EVR mode is released the adjusted data is memorized 3 6 5 Separation 2 Signal A e RF signal Audio L ch 5 kHz 14 modulated Mode B Tuner EE Equipment C Audio level meter Measuring point D 1C1501 pin 26 EVR mode F1 Jig RCU Code 57 EVR address F2 A 24 Press remote controller 2 and 4 keys Specified value G Minimum level Adjustment tool H Jig RCU PTU94023B e Digit key remote controller 1 Set an audio signal mode of the RF signal generator to alternate L ch 5 kHz 14 modulated 2 Connect the equipment C to t
49. No emergency record Note DV For the emergency content see 1 11 3 Emergency con tent description VHS For the emergency content see 1 11 3 Emergency con tent description 2 Transmit the code 59 from the Jig RCU again The FDP shows the emergency detail information in the form of 1 2 34 1 Deck operation mode at the moment of emergency 2 Mechanism operation mode at the moment of emer gency 3 Mechanism sensor information at the moment of emergency 4 Mechanism mode position at the moment of emer gency Note e For the emergency detail information Q see 1 11 4 Emergency detail information 3 Transmit the code 59 from the Jig RCU once again The FDP shows the emergency detail information in the form of 5 6 7 5 Type of the cassette tape in use 1 6 Winding position of the cassette tape in use 7 Type of the cassette tape in use Winding area Note e For the emergency detail information see 1 11 5 Emer gency detail information 4 Transmit the code 59 from the Jig RCU once again to re set the display 1 11 2 Clearing the emergency history 1 Display the emergency history 2 Transmit the code 36 from the Jig RCU 3 Reset the emergency display Y292 03e 1 11 3 Emergency content description Note Emergency contents E08 E09 are for the model with Dynamic Drum DD FDP CONTENT CAUSE
50. Remove the tension spring on the back of the main deck Then release the lug of the tension arm bearing in the arrow indicated direction and draw out the tension arm assembly See Fig 2 2 21a Lug of the tension Tension arm Reel disk supply side arm bearing assembly Tension brake assembly Lugs e Tension spring Main brake assembly supply side Fig 2 2 21a 2 2 22 Idler Lever Idler Arm Assembly 1 How to remove 1 Remove the lug of the idler lever from the main deck and remove the hook fitted in the idler arm assembly hole by lifting it 2 Remove the slit washer and pull out the idler arm assem bly Lug Idler lever Hu o H O M o O Hook I o 8 Idler arm SD To SECH S L ES assembly dy R E li SE me Slit washer Fig 2 2 22a 2 2 23 Stator Assembly 1 Remove the flat cable 2 Remove the two screws A 3 Remove the stator assembly by lifting in the arrow indi cated direction Take care that the brush spring does not jump out 4 After installation be sure to perform the PB switching point adjustment according to the electrical adjustment procedure Screws A Flat cable Take care not to mix up the polar faces when installing Fig 2 2 23a a i a i Stator assembly
51. S cassette switch Procedures for Lowering the Cassette holder assembly As the mechanism of this unit is integrated with the Housing assembly the holder must be lowered and the two screws un screwed when removing the Mechanism assembly Turn the loading motor pulley in the direction as indicated by Fig 2 As both and levers are lodged twice push the levers in the direction as indicated by Fig 3 to release them When pushing the levers do it in the order of When the holder has been lowered turn the pulley until the cassette holder is securely in place without allowing any up down movement Procedures for Lowering the Cassette holder assembly Note When installing the Drum assembly secure the screws S7 in the order of Inertia plate 1 2 S7 IST wes Sab Foil side lt Note 2 gt WR10 Foil side Roller arm lt Note 1 2 gt assy Not use Fig V1 Note When installing the Mechanism assembly secure the screws S8 in the order of 6 DS 9 4 WR11 S3 Foil side lt Note 4 gt lt Note 2 gt A AR Fk S3 lt Note 4 gt 4 7 g S10 AA an ER Gi tat E Spacer lt Note 4 gt 3002 Mechanism ass y S cassette switch 9 S3 WR5 WR4 Foil side Foil side lt Note 2 gt lt Note 2 gt WR14 Foil side lt Note 2 gt CN703
52. Zb Aa 5 Type of the cassette tape in use 6 Winding position of the cassette tape in use 7 Type of the cassette tape in use Winding area Note e EMG detail information is the reference information stored using the remaining tape detection function of the cassette tape As a result it may not identify cassette cor rectly when a special cassette tape is used or when the tape has variable thickness 5 Cassette tape type Display Cassette Tape Type 00 Cassette type not identified 16 Large reel small reel T 0 to T 15 T 130 to T 210 not classified 82 Small reel thick tape T 120 identified thin tape T 140 identified 0 Initial value 1 EJECT position 2 Housing operating 3 U L STOP position 4 Tape being loaded unloaded When the pole base is located on the front side of the position just beside the drum 84 Large reel T 0 to T 60 identified 92 Small reel thick tape T 130 identified thin tape T 160 to T 210 identified 93 Small reel thick tape C cassette T 0 to T 100 C cassette not classified C3 Small reel thick tape C cassette T 0 to T 100 C cassette being classified D3 Small reel thick tape C cassette T 0 to T 100 C cassette being classified E1 C cassette thick tape TC 10 to TC 20 identified 25 Tape being loaded unloaded When the pole base is located on the rear side of the position just beside the drum E2 Small ree
53. ad abnormal tension g The take up reel sensor does not output the FG pulse Gi The su py reel pulse is not generated in the REV transport modes REV SEARCH REW etc because 1 The idler gear is not meshed with the supply reel gear 2 The idler gear is meshed with the supply reel gear but incapable of wind ing due to too large a mechanical load abnormal tension 3 The supply reel sensor does not output the FG pulse Power is not supplied to the reel sensors E04 Drum FG EMG When the drum FG pulse has not been input for more than 3 seconds in the drum rotating mode E 04 is iden tified the pinch rollers are turned off and stopped and the power is turned off The drum could not start or the drum rotation has stopped due to too large a load on the tape because 1 The tape tension is abnormally high 2 The tape is damaged or a foreign object grease etc adheres to the tape e drum FG pulse did not reach the System controller CPU because 1 The signal circuit is disconnected in the middle 2 The FG pulse generator hall device of the drum is faulty The drum control voltage DRUM CTL V is not supplied to the MDA Power is not supplied to the drum MDA E05 Cassette Eject EMG When the eject operation does not complete in 3 sec onds after the start E 05 is identified the pinch rollers are turned off and stopped and the power is turned off When the cassette insertion operation does not complete
54. ainst fire hazard Replace only with same type and rated fuse s as specified Use specified internal wiring Note especially 1 Wires covered with PVC tubing 2 Double insulated wires 3 High voltage leads Use specified insulating materials for hazardous live parts Note especially 1 Insulation Tape 3 Spacers 5 Barrier 2 PVC tubing 4 Insulation sheets for transistors When replacing AC primary side components transformers power cords noise blocking capacitors etc wrap ends of wires securely about the terminals before soldering Fig 1 Observe that wires do not contact heat producing parts heatsinks oxide metal film resistors fusible resistors etc Check that replaced wires do not contact sharp edged or pointed parts When a power cord has been replaced check that 10 15 kg of force in any direction will not loosen it Power cord Fig 2 Also check areas surrounding repaired locations Products using cathode ray tubes CRTs In regard to such products the cathode ray tubes themselves the high voltage circuits and related circuits are specified for compli ance with recognized codes pertaining to X ray emission Consequently when servicing these products replace the cath ode ray tubes and other parts with only the specified parts Under no circumstances attempt to modify these circuits Unauthorized modification can increase the high voltage value and cause X ray em
55. ard Specified value G 1 00 0 015 Vp p reference value Note Adjustment part F 1 Insert the cassette tape A3 to enter the mode B 2 Observe the VIDEO OUT waveform at the measuring point D 3 Check the Y level value when the External S input Y C separated video signal 4 Switch the input signal to the External input composite video signal and adjust the adjustment part F so that the Y level becomes the same value observed in step 3 Note vats e The specified value G is just a reference value to be Fig 3 2 1a Switching point obtained when the External S Video Y C separated video signal is input In actual adjustment set it to 3 2 2 Slow tracking preset the value observed in step 3 Signal A1 e Ext input mama e em A2 Color colour bar signal NTSC oe WW g ee a del WKi e Mode B1 S VHS SP Oo n Uitte EN B2 S VHS EP jm Y level nT ie U PR LL nT Ke Measuring point D e TV Monitor jose een GC Adjustment part F e Jig RCU Code 71 or 72 a Specified value G Minimum noise mee Adjustment tool H Jig RCU PTU94023B 3 2 Fig 3 3 1a D A level 3 3 2 EE Y level Signal A1 Ext input A2 Color colour bar signal NTSC Mode B EE Equipment C Oscilloscope Measuring point D Y OUT te
56. ary encoder angle ON HALF PRESS Pole base CONTACT OFF ON PLAY 7 ON REV Pinch roller CONTACT OFF C INS ON Guide arm OFF ON Tension arm hee eee OFF ON Main brake S CONTA OFF ON Main brake T GONTAGT OFF ON Sub brake S Sub brake T ON Capstan brake OFF IN FF REW Direct gear OUT PLAY OFF Change lever 2 ON SUPPLY Idler position CENTER TAKE UP READY Take up lever Rec safety switch Timer REC Backspace Slow FOR REC pause standby Search REW REC STOP drum at stop Operation mode Slow REW Search FF POWER OFF cassette loaded 2 19 SECTION 3 ELECTRICAL ADJUSTMENT 3 1 PRECAUTION The following adjustment procedures are not only necessary after replacement of consumable mechanical parts or board assemblies but are also provided as references to be re ferred to when servicing the electrical circuitry In case of trouble with the electrical circuitry always begin a service by identifying the defective points by using the meas uring instruments as described in the following electrical ad justment procedures After this proceed to the repair replace ment and or adjustment If the required measuring instruments are not available in the field do not change the adjustment parts variable resistor etc ca
57. at the V PB FM waveform becomes maximum 5 Transmit the code F from the Jig RCU to adjust so that the trigger point of the VIDEO OUT waveform is changed from the trailing edge of the V sync signal becomes the specified value G 6 Set the VCR to the stop mode or eject mode Trigger point V syne be Switching point 1 Record the signal A2 in the mode B1 and play back the recorded signal 2 Press the channel buttons simultaneously to enter the manual tracking mode This also brings tracking to the center centre 3 Set the VCR to the FWD slow mode 4 Transmit the code F from the Jig RCU to adjust so that the noise bar becomes the specified value G on the TV monitor in the slow mode 5 Set the VCR to the Stop mode 6 Confirm that the noise bar is G on the TV monitor in the slow mode 7 Repeat steps 3 to 6 in the REV slow mode 8 Repeat steps 1 to 7 in the mode B2 Note e For FWD slow 1 6x playback transmit the code 08 from the Jig RCU to enter the slow playback mode and transmit the code DO for REV slow 1 6x mode 3 3 VIDEO CIRCUIT 3 3 1 D A level Signal A1 Ext S input Ext input A2 Color colour bar signal NTSC A3 S VHS tape Mode B S VHS e EE Equipment C Oscilloscope Measuring point D VIDEO OUT terminal 75Q terminated e VR1401 D A LEVEL ADJ 3D DIGITAL 4M bo
58. e cause of any mechanical failure manually remove it by tak ing the following steps 1 Unplug the power cable and remove the top cover front panel assembly and others so that the mechanism as sembly is visible See 1 3 DISASSEMBLY ASSEMBLY METHOD 2 While keeping the tension arm assembly of the mecha nism assembly free from tension pull the tape on the pole base assembly supply or take up side out of the guide roller See Fig 2 1 3c 3 Take the spring of the pinch roller arm assembly off the hook of the press lever assembly and detach it from the tape See Fig 2 1 3d 4 In the same way as in the electrical failure instructions in 2 1 3 1 4 remove the top guide 5 Raise the cassette tape cover By keeping it in that posi tion draw out the cassette tape case from the cassette holder and take out the tape 6 By hanging the pinch roller arm assembly spring back on the hook take up the slack of the tape into the cas sette Pole base assembly take up side Jo ole TaN O o SS o N O Si O x Wi O Pole base assembly T D Q supply side Tension arm assembly p ai H ai oo Y WE ml Ad RIA Fig 2 1 3c Take the spring off the hook and f detach it from the tape Press lever assembly
59. echanism assembly Y Main board assembly y LG Base 1 1 6 2 Dlsassembly assembly method NHS section gt Step e Loc No Part name Fig No Point Note Drum assembly V1 3 S7 CON1 WR9 lt Note 1 2 gt CN1 WR10 Inertia plate A0 a a Roller arm assy P1 L2 Mechanism v2 2 S3 S9 S10 lt Note 2 4 gt assembly L3 L4 CN1 WR11 Main board V3 2 S3 S5 lt Note 2 gt assembly CN5321 WRS CN5322 WR4 CN3014 WR14 CN703 WR15 CN2601 WR16 Base 1 V4 S3 3 S5 lt Note 1 gt When attaching or removing the FPC take care not to dis connect any of the wires lt Note 2 gt When attaching the FPC be sure to connect it in the cor rect orientation lt Note 3 gt When attaching wires connect them in the correct orien tation lt Note 4 gt e When it is required to remove the screws S3 retaining the Mechanism assembly please refer to the Procedures for Lowering the Cassette holder assembly See on page 1 5 e When removing the Mechanism assembly only unhook the two spacers connecting it with the Main board assembly with pliers from the back side of the Main board assembly first and then remove the Mechanism assembly e When reattaching the Mechanism assembly to the Main board assembly take care not to damage the sensors on the Main board assembly D3001 LED Q3002 Start sen sor Q3003 End sensor 83002
60. eeeeeeteeeeeeeneeees 4 48 4 24 EJECT SW DISPLAY LED SW JACK AND LED CIRCUIT BOARDS 4 49 425 7 MAIN CIRCUIT BOARD est SEET 4 51 4 26 DEMODULATOR AND ON SCREEN CIRCUIT BOARDS 4 54 4 27 DIGITAL CIRCUIT BOARD 4 28 FDP GRID ASSIGNMENT AND ANODE CONNECTION 4 29 REMOTE CONTROL SCHEMATIC DIAGRAM 4 30 WAVEFORMS 4 31 VOLTAGE CHARTS 4 32 CPU PIN FUNCTION 4 33 SYSTEM CONTROL BLOCK DIAGRAM VHS 4 34 AUDIO BLOCK DIAGRAM 4 35 VIDEO BLOCK DIAGRAM VHS 4 36 VIDEO AUDIO BLOCK DIAGRAM HDD 5 PARTS LIST 5 1 PACKING AND ACCESSORY ASSEMBLY lt M1 gt 5 2 FINAL ASSEMBLY lt M2 gt 5 3 MECHANISM ASSEMBLY lt M3 gt 5 4 ELECTRICAL PARTS LIST SW REGULATOR BOARD ASSEMBLY lt 01 gt REGULATOR BOARD ASSEMBLY lt 02 gt MAIN BOARD ASSEMBLY lt 03 gt 3D DIGITAL 2M BOARD ASSEMBLY lt 07 gt TERMINAL BOARD ASSEMBLY lt 06 gt A C HEAD BOARD ASSEMBLY lt 12 gt DEMOD BOARD ASSEMBLY lt 14 gt S SUB BOARD ASSEMBLY lt 15 gt ON SCREEN BOARD ASSEMBLY lt 17 gt EJECT SW BOARD ASSEMBLY lt 27 gt SW DISPLAY BOARD ASSEMBLY lt 28 gt JACK BOARD ASSEMBLY lt 36 gt LED SW BOARD ASSEMBLY lt 47 gt DIGITAL BOARD ASSEMBLY lt 50 gt LOADING MOTOR BOARD ASSEMBLY lt 55 gt LED BOARD ASSEMBLY lt 90 gt Important Safety Precautions Prior to shipment from the factory JVC products are strictly inspected to conform with the recognized product safety and electrical codes of the countri
61. er cable and remove the top cover bracket and front panel assembly See 1 3 DISASSEM BLY ASSEMBLY METHOD 2 Unload the cassette by manually turning the loading mo tor of the mechanism assembly toward the front In do ing so hold the tape by the hand to keep the slack away from any grease See Fig 2 1 3a 3 Bring the pole base assembly supply or take up side to a pause when it reaches the position where it is hidden behind the cassette tape 4 Move the top guide toward the drum while holding down the lug of the bracket retaining the top guide Like wise hold part B down and remove the top guide Section of the top guide is then brought under the cassette lid Then remove the top guide by pressing the whole cassette tape down See Fig 2 1 3b 5 Remove the cassette tape by holding both the slackened tape and the cassette lid 6 Take up the slack of the tape into the cassette This com pletes removal of the cassette tape Loading motor OO Pole base assembly Fig 2 1 3a Fig 2 1 3b 2 In case of mechanical failure If you cannot remove the cassette tape which is loaded b
62. es in which they are to be sold However in order to maintain such compliance it is equally important to implement the following precautions when a set is being serviced Precautions during Servicing 1 Locations requiring special caution are denoted by labels and in scriptions on the cabinet chassis and certain parts of the product When performing service be sure to read and comply with these and other cautionary notices appearing in the operation and serv ice manuals Parts identified by the A symbol and shaded parts are critical for safety Replace only with specified part numbers Note Parts in this category also include those specified to com ply with X ray emission standards for products using cathode ray tubes and those specified for compliance 12 Crimp type wire connector In such cases as when replacing the power transformer in sets where the connections between the power cord and power trans former primary lead wires are performed using crimp type connec tors if replacing the connectors is unavoidable in order to prevent safety hazards perform carefully and precisely according to the following steps 1 Connector part number E03830 001 2 Required tool Connector crimping tool of the proper type which will not damage insulated parts 3 Replacement procedure with various regulations regarding spurious radiation emission Fuse replacement caution notice Caution for continued protection ag
63. et an audio signal mode of the RF signal generator to mono 300 Hz 2 Connect the equipment C to the measuring point D 3 Set the VCR to the EVR mode by transmitting the code F1 from the Jig RCU 4 Set the EVR address to F2 by pressing the button of the digit key remote controller 5 Adjust with the channel buttons on the VCR or on the remote controller so that the level of the measuring point D becomes the specified value G 6 Release the EVR mode of the VCR by transmitting the code F1 from the Jig RCU again When the EVR mode is released the adjusted data is memorized 3 6 2 Stereo VCO Signal A e No signal Mode B e Tuner sEE Equipment C Frequency counter Measuring point D1 IC1501 pin 26 Short point D2 C1505 terminal EVR mode F1 Jig RCU Code 57 EVR address F2 A 21 Press remote controller 2 and 1 keys Specified value G 15 73 0 1 kHz Adjustment tool H Jig RCU PTU94023B e Digit key remote controller Signal A RF signal Audio mono 300 Hz and the GND Ground Mode B Tuner ee 3 6 3 Stereo filter Equipment C Audio level meter Signal A RF signal Audio No signal Measuring point D 1C1501 pin 26 Mode B e Tuner EVR mode F1 Jig RCU Code 57 e EE EVR address F2 A 20 Press remote controller 2 Equipmen
64. guide rail and roller cam assembly See Fig 2 2 3a 3 lugs on the guide rail and one lug on the roller cam assembly Guide rail Roller cam WA e t p m Fig 2 2 3a 2 Remove the two slit washers and remove the cassette housing bracket See Fig 2 2 3b 3 Remove the opener guide spring A door opener relay gear and limit gear See Fig 2 2 3b AUS Limit gear 7 ON lt P Spring A Door opener Slit washers Cassette housing bracket Fig 2 2 3b 4 While swinging the lock levers R and L of the cassette holder assembly toward the front slide the cassette holder assembly until its legs come to where the guide rail and the roller cam assembly have been removed so that the drive arm is upright See Fig 2 2 3c Drive arm Lock lever L Upright Cassette holder assemb Fig 2 2 3c 5 While holding the left side of the cassette holder lift the cassette holder assembly so that the three legs on the left side are all released Then pull the legs A and on the right side out of the rail and also pull up the leg See Fig 2 2 3d and Fig 2 2 3e 6 Draw out the drive gear and remove the drive arm Cassette holder assembly A E E LS LA CE ge
65. he measuring point D 3 Set the VCR to the EVR mode by transmitting the code F1 from the Jig RCU 4 Set the EVR address to F2 by pressing the button of the digit key remote controller 5 Adjust with the channel buttons on the VCR or on the remote controller so that the level of the measuring point D becomes the specified value G 6 Release the EVR mode of the VCR by transmitting the code F1 from the Jig RCU again When the EVR mode is released the adjusted data is memorized 3 6 6 SAP VCO Signal A e No signal Mode B Tuner e EE Equipment C Frequency counter Measuring point D1 1C1501 pin 26 Short point D2 C1505 terminal EVR mode F1 Jig RCU Code 57 EVR address F2 A 25 Press remote controller 2 and 5 keys Specified value QG 78 67 0 5 kHz Adjustment tool H Jig RCU PTU94023B e Digit key remote controller 1 Connect the short wire between the short point D2 and the GND Ground 2 Connect the equipment C to the measuring point D1 3 Set the VCR to the EVR mode by transmitting the code F1 from the Jig RCU 4 Set the EVR address to F2 by pressing the button of the digit key remote controller 5 Adjust with the channel buttons on the VCR or on the remote controller so that the frequency of the meas uring point D1 becomes the specified value G
66. ig 2 2 10a Rotary encoder Front side Screw A a Guide marks N Rotary encoder Back side Positioning pin of the rotary encoder Fig 2 2 10a Shaft of the rotary encoder guide Control plate Fig 2 2 10b 2 How to install Phase matching 1 Make sure that the mark E of the control plate is in align ment with the mark W of the loading arm gear shaft and bring the guide marks on the rotary encoder into align ment as indicated in Fig 2 2 10a See Fig 2 2 10a and Fig 2 2 10b 2 Turn over the rotary encoder with its guide marks kept in alignment and install it by fitting on the shaft of the rotary encoder guide and the positioning pin 3 Tighten the screw A to complete the installation 2 2 11 Clutch Unit 1 Remove the belt wound around the capstan motor and the clutch unit 2 Remove the slit washer and remove the clutch unit Fig 2 2 11a 2 2 12 Change Lever Assembly Direct Gear Clutch Gear and Coupling Gear 1 How to remove 1 Release the two lugs of the rotary encoder guide in the arrow indicated direction and remove the change lever assembly 2 Remove the slit washer retaining the direct gear and re move the latter Take care so as not to lose the washer and spring See Fig 2 2 12a Change lever Li Slit washer assembly 3 Washer 1 eo Gi Spacer Direc
67. in 3 seconds after the start the cassette is ejected In addition when the operation does not complete within 3 seconds after the Start e is also identitied and the power is turned off immediately The cassette cannot be ejected due to a failure in the drive mechanism of the housing When the housing load increases during ejection the loading motor is stopped because of lack of headroom in its drive torque Housing load increasing factors Temperature environment low tempera ture etc mechanism wear or failure The sensor switch for detecting the end of section are not functioning normally The loading motor drive voltage is lower than specified or power is not sup plied to the motor MDA When the user attempted to eject a cassette a foreign object or perhaps the user s hand was caught in the opening of the housing E06 Capstan FG EMG When the capstan FG pulse has not been generated for more than 1 second in the capstan rotating mode E 06 is identified the pinch rollers are turned off and stopped and the power is turned off However the capstan EMG is not detected in STILL SLOW FF REW modes The capstan could not start or the capstan rotation has stopped due to too large a load on the tape because 1 The tape tension is abnormally high mechanical lock 2 The tape is damaged or a foreign object grease etc is adhered to the tape occurrence of tape entangling etc The capstan FG pulse did not
68. ission from the cathode ray tube 1 Remove the old connector by cutting the wires at a point close to the connector Important Do not reuse a connector discard it ze SC j Z cut close to connector Fig 3 2 Strip about 15 mm of the insulation from the ends of the wires If the wires are stranded twist the strands to avoid frayed conductors Fig 4 3 Align the lengths of the wires to be connected Insert the wires fully into the connector Metal sleeve Connector Fig 5 4 As shown in Fig 6 use the crimping tool to crimp the metal sleeve at the center position Be sure to crimp fully to the complete closure of the tool Crimping tool 5 Check the four points noted in Fig 7 Crimped at approx center Not easily pulled free of metal sleev Conductors extended Wire insulation recessed more than 4 mm Fig 7 S40888 01 Safety Check after Servicing Examine the area surrounding the repaired location for damage or deterioration Observe that screws parts and wires have been returned to original positions Afterwards perform the following tests and confirm the specified values in order to verify compliance with safety standards Insulation resistance test Confirm the specified insulation resistance or greater between power cord plug prongs and exter nally exposed parts of the set RF terminals antenna terminals video and audio input and output terminals microphone
69. l thick tape T 0 to T 100 identified E9 C cassette thin tape TC 30 to TC 40 identified 6 Pole base compressed position F1 C cassette thick tape thin tape TC 10 to TC 40 not classified 7 FF REW position 8 Between FF REW and STOP with pinch roller compression ON 9 STOP with pinch roller compression OFF A_ Between STOP with pinch roller compression OFF and REV B_ REV REV STILL SLOW position C_ Between REV and FWD D_ FWD FWD STILL SLOW position E Between FWD and PLAY E PLAY position Table of HD Display Mechanism Mode Position 0 EJECT position 1 U L STOP position 2_ Tape being loaded unloaded When the pole base is located on the rear side of the position just beside the drum 3__ FF REW position 4 STOP with pinch roller pressure off 5 REV REV STILL SLOW position 6 FWD FWD STILL SLOW position PLAY position 7 Intermediate position during transition between other mechanism modes Note e As the display is always 7 at any intermediate position between mechanism modes the position of transitory EMG may sometimes not be locatable Notes e Cassette tape type Q is identified a few times during mode transition and the identification count is variable depending on the cassette tape type If an EMG occurs in the middle of identi fication the ca
70. lever Reel disk take up side Tension brake assembly Tension arm assembly Idler lever Brake lever 1 2 2 3 Guide rail 2 2 3 Roller cam assembly 2 2 3 Cassette housing bracket 2 2 3 Opener guide 2 2 3 Door opener 2 2 3 Relay gear 2 2 3 Limit gear 2 2 3 Cassette holder assembly 2 2 3 Drive gear 2 2 3 Drive arm 2 2 4 Pinch roller arm assembly 2 2 5 Guide arm assembly 2 2 5 Press lever assembly 2 2 6 A C head 2 2 7 Loading motor 2 2 8 Capstan motor 2 2 9 UV catcher2 2 2 9 Pole base assembly take up side 2 2 9 Pole base assembly supply side 2 2 10 Rotary encoder 2 2 11 Clutch unit 2 2 12 Change lever assembly 2 2 12 Direct gear 2 2 12 Coupling gear 2 2 12 Clutch gear 2 2 13 Link lever 2 2 14 Cassette gear 2 2 14 Control cam 2 2 14 Worm gear Lid guide 2 2 15 Control bracket 2 2 15 Control plate 2 2 16 Loading arm gear supply side 2 2 16 Loading arm gear take up side 2 2 16 Loading arm gear shaft 2 2 17 Take up lever 2 2 17 Take up head 2 2 17 Control plate guide 2 2 18 Capstan brake assembly 2 2 19 Sub brake assembly take up side T 2 2 20 Main brake assembly take up side 2 2 20 Main brake assembly supply side T 2 2 20 Reel disk take up side 2 2 21 Tension brake assembly 2 2 21 Reel disk supply side 2 2 21 Tension arm assembly 2 2 21 Tension arm bearing 2 2 22 Idler lever 2 2 22 Idler arm assembly Brake lever 1 Rotary encoder guide dE
71. lever assembly ED Clutch unit Fig 2 1 50 Mechanism assembly bottom side a Guide rail E Roller cam assembly rag Dal e f S Z rie y han LS Fig 2 1 5c Mechanism assembly left side Opener guide Door opener en Drive gear Rs Limit gear Cassette housing bracket Worm gear l Loading motor Belt loading motor Fig 2 1 5d Mechanism assembly right side 2 Cleaning Regular cleaning of the transport system parts is desirable but practically impossible So make it a rule to carry out clean ing of the tape transport system whenever the machine is serviced When the video head tape guide and or brush get soiled the playback picture may appear inferior or at worst disap pear resulting in possible tape damage 1 When cleaning the upper drum especially the video head soak a piece of closely woven cloth or Kimu wipe with alcohol and while holding the cloth onto the upper drum by the fingers turn the upper drum counterclockwise Note e Absolutely avoid sweeping the upper drum vertically as this will cause damage to the video head 2 To clean the parts of the tape transport system other than the upper drum use a piece of closely woven cloth or a cotton swab soaked with alcohol 3 After cleaning make sure
72. loading arm gear shaft and lift it Likewise turn the loading arm counterclockwise so that the notch is in alignment with the projection and remove the loading arm gear take up side See Fig 2 2 16a and Fig 2 2 16b 4 When removing the loading arm gear shaft be sure of first removing the screw retaining the drum assembly on the back side of the loading arm gear shaft Then re move the screw C and remove the loading arm gear shaft by sliding it Si i Tak l Idler arm assembly PN ake up lever R section A T E Guide hole of the control plate guide we 1 5mm hexagonal wrench Fig 2 2 15b amp Section D Section A Pole base assembly supply side Section A Een A Tension arm assembly shaft Section B Section B Hole B Control plate Fig 2 2 15c 2 2 16 Loading Arm Gear supply or take up side and Loading Arm Gear Shaft 1 How to remove 1 Remove the loading arm gear supply side by loosen ing the screw A See Fig 2 2 16a 2 Remove the screw B and remove the torsion arm from the pole base assembly take up side See Fig 2 2 16a Pole base assembly Pole base assembly take up side supply side Guide marks Torsion arm Screw C Loading arm gear take up side Loading arm gear supp
73. lue G 1 Record the signal A2 in the mode B and play back the recorded signal 2 Observe the waveform at the measuring point D 3 Adjust the adjustment part F so that the Y level becomes the specified value G Y level Fig 3 4 2a HDD PB Y level 3 4 3 HDD PB C burst level Signal A1 Ext input A2 Color colour bar signal NTSC Mode B SP Equipment C Oscilloscope Measuring point D e TP8601 or CN8601 pin 3 Digital board e VR8603 Digital board 286 20mVp p Adjustment part F Specified value G 1 Record the signal A2 in the mode B and play back the recorded signal 2 Observe the waveform at the measuring point D 3 Adjust the adjustment part F so that the burst level be comes the specified value G Burst level H rate Fig 3 4 3a HDD PB C burst level 3 5 AUDIO CIRCUIT Notes e This adjustment should be done after the REC color colour level adjustment for the video circuit has been completed e GND Ground should be taken from the Tuner shield case 3 5 1 Audio REC FM Signal A1 Ext input A2 Audio No signal A3 Video Color colour bar signal NTSC Mode B S VHS EP Equipment C Oscilloscope Measuring point D e TP2253 A FM External trigger E e TP111 D FF EVR mode
74. ly side Loading arm gear shaft Fig 2 2 16a Loading arm gear shaft Projection A Projection B Loading arm gear take up side Fig 2 2 16b 2 How to install 1 Align the notch of the loading arm gear take up side to the projection B of the loading arm gear shaft and slip it over Then rotate it clockwise for alignment with the pro jection A and slip it down to the bottom See Fig 2 2 16b 2 Then turn the loading arm gear take up side counterclockwise Hang the torsion arm on the pole base assembly take up side and tighten the screw B 3 Install the loading arm gear supply side so that the guide mark of the loading arm gear take up side is in align ment with the guide mark of the loading arm gear sup ply side Then hang the torsion arm on the pole base assembly supply side and tighten the screw A See Fig 2 2 16a 2 2 17 Take up Lever Take up Head and Control Plate Guide 1 Remove the spring of the take up lever from the main deck 2 Remove the lug A of the take up lever from the main deck and pull out the take up lever and the take up head together 3 Remove the screw A 4 Align the idler arm assembly pin in the center centre of the R section of the control plate guide remove the con trol plate guide lugs B and C from the main deck and remove the control plate guide Idler arm assembly pin Take up lever Lug C SL S gt o
75. ly to enter the manual tracking mode This also brings tracking to the center centre 4 Make sure that there is no significant level drop of the V PB FM waveform caused by the tracking operation with its generally parallel and linear variation ensured Per form the following adjustments when required See Fig 2 3 1a 5 Reduce the V PB FM waveform while pressing the chan nel buttons during playback If a drop in level is found on the left side turn the guide roller of the pole base assembly supply side with the roller driver to make the V PB FM waveform linear If a drop in level is on the right side likewise turn the guide roller of the pole base assembly take up side with the roller driver to make it linear See Fig 2 3 1c 6 Make sure that the V PB FM waveform varies in parallel and linearly with the tracking operation again When re quired perform fine adjustment of the guide roller of the pole base assembly supply or take up side 7 Unload the cassette tape once play back the alignment tape A1 again and confirm the V PB FM waveform 8 After adjustment confirm that the tape wrinkling does not occur at the roller upper or lower limits See Fig 2 3 1d Perform adjustment step 9 only for the models equipped with SP mode and EP or LP mode 9 Repeat steps 1 to 8 by using the alignment tape A2 2 gt
76. n and remove the reel disk take up side 2 Remove the spring attached to the main brake assembly 3 Remove the lug A of the main brake assembly take up side and pull out the lug B after bringing it into align ment with the main deck notch 4 Remove the lugs C D and E of the main brake as sembly supply side from the main deck and pull them off See Fig 2 2 20a 5 When installing the main brake assembly take up side slide the brake lever in the direction as indicated by the arrow to prevent it from hitting the projection of the main brake assembly take up side See Fig 2 2 20b Main brake assembly supply side Reel disk take up side Main brake assembly take up side Lug E Spring Lug D Lug A Fig 2 2 20a e Rotary encoder guide Projection of the main brake assembly take up side Note Kai e The parts with marked x have different types of mechanisms standard type or high speed FF REW type 1 Uses the standard type mechanism only Fig 2 2 20b 2 2 21 Tension Brake Assembly Reel Disk supply side and Tension Arm Assembly 1 How to remove 1 Remove the three lugs of the tension brake assembly from the main deck and pull them off 2 Remove the reel disk supply side by loosening in the arrow indicated direction the main brake assembly sup ply side 3
77. n or noise appearing on the playback screen 11 Release the EVR mode of the VCR by transmitting the code F1 from the Jig RCU again When the EVR mode is released the adjusted data is memorized 12 Repeat steps 3 to 11 in the mode B2 Note e After adjusting always perform the confirmation and re adjustment of the item 3 4 1 Specified value G V rate Fig 3 3 4b REC color colour level 3 3 5 Video EQ Frequency response Signal Ext S input A1 A2 Video sweep signal Mode B1 S VHS SP B2 B3 e S VHS EP Picture Control Smart Picture REC Normal Natural PB Edit Distinct C Oscilloscope D1 OUT terminal 75Q terminated D2 3 MHz E TP111 D FF F1 Jig ROU Code 57 F2 A 03 Press remote controller 0 and 3 keys SP 3 2 0 2 div 2 0 5 dB EP 2 8 0 2 div 3 0 5 dB e Jig RCU PTU94023B e Digit key remote controller Equipment Measuring point Frequency marker External trigger EVR mode EVR address Specified value G Adjustment tool H Scale A Four scale 100KHZ 4 MHz o MHz Frequency 4 div
78. not be generated until that time 3 The FG pulse output from the take up reel sensor is absent The power to a reel sensor is not supplied EC1 or EU1 Head clog warning Presupposin channels wi the presence of the_control pulse output in the PLAY mode when the value obtained by mixing the two V FM output out regard to the A FM output has remained below a certain threshold level for more than 10 seconds E C1 or E U1 is identified and recorded in the emergency history During the period in which a head clog is detected the FDP and OSD repeat the 3 second warning display and 7 second noise picture display alternately EMG code E C1 or E U1 FDP U 01 OSD Try cleaning tape or Use cleaning cassette The head clog warning is reset when the above mentioned threshold has been exceeded for more than 2 seconds or the mode is changed to another mode than PLAY Table 1 11 1 1 11 4 Emergency detail information CU 2 Mechanism Operation Mode The status electrical operation mode of the VCR and the sta
79. ntrol cam cassette gear limit gear relay gear and drive gear are installed in their correct posi tions Especially this model is not provided with any cassette hous ing assembly so that cassette loading and unloading must be accomplished by operation of the cassette holder assem bly The latter is in turn driven by such parts as the drive gear relay gear and limit gear Exercise enough care there fore to have the phases of all this gear matching one an other For information on phase matching of the mechanism see the instructions on how to install individual parts This unit is provided with a mechanism assembly mode It is therefore necessary to enter this mode for assembling and disassembling procedures This mode is usually not in use manually set it when it is required 2 2 2 How to Set the Mechanism Assembling Mode Remove the mechanism assembly and place it bottom side up See SECTION 1 DISASSEMBLY Turn the worm gear toward the front so that the guide hole of the control cam is brought into alignment with the hole at the mechanism as sembly chassis This position renders the mechanism assem bling mode operational Make sure that the control plate is located in alignment with the mark E See Fig 2 2 2a Chassis hole Worm gear Control plate Fig 2 2 2a 2 2 3 Cassette Holder Assembly 1 How to remove 1 Remove the
80. ol To the drum Audio control head To the capstan Fig 2 3 3a Alignment tape Alignment tape SP stairstep EP LP stairstep A played with the played with the 3 P head 1 EP LP head S 3 E 2 D S X value_adjustment_point Drum side Control head position Capstan side gt Maximum Fig 2 3 3b 2 3 4 Checking Adjustment of the Standard Tracking Preset Signal A e Alignment tape EP stairstep NTSC MHP L Mode B e PB Auto adjust Equipment C Oscilloscope Measuring point e TP106 PB FM e TP111 D FF F Jig RCU Code 50 G STOP mode Maximum V PB FM waveform e Jig RCU PTU94023B lt Adjustment part External trigger E Specified value Adjustment tool H 1 Play back the alignment tape A 2 Apply the external trigger signal to D FF E to observe the V PB FM waveform at the measuring point D 3 Confirm that the automatic tracking operation is com pleted 4 Set the VCR to the Auto
81. osed accessible parts See figure 10 and grounding specifications OO OO Grounding Specifications AC inlet Exposed accessible part ogo OO o Region Grounding Impedance Z USA amp Canada Z lt 0 1 ohm Europe amp Australia Z lt 0 5 ohm oo Earth pin Milli ohm meter Fig 10 AC Line Voltage Region Insulation Resistance R Dielectric Strength Clearance Distance d d 100 V J R 2 1 M9 500 V DC AC 1 kV 1 minute dd 2 3 mm 100 to 240 V ane AC 1 5 kV 1 miute dd gt 4mm 110 to 130 V USA amp Canada 1 MQ SR lt 12 MQ 500 V DC AC 1kV 1 minute d d 3 2 mm AC 3 kV 1 minute 4mm 110 to 130 V i gt Class I 200 to 240 V Europa S australia Be Meee AC 1 5 kV 1 minute 8 mm Power cord Class I 6 mm Primary wire IN IN IM Table 1 Specifications for each region AC Line Voltage Region Load Z Leakage Current i a b c o NVVy 100 V Japan i lt 1 mA rms Exposed accessible parts 110 to 130 V USA amp Canada i lt 0 5 mA rms Exposed accessible parts i S 0 7 mA peak 110 to 130 V E Se i 2mAdc urope ustraila 220 to 240 V DEE Ee i 0 7 mA peak 50 kO i 2mAdc Antenna earth terminals Other terminals Table 2 Leakage current specifications for each region Note These tables are unofficial and for reference only Be sure to confirm the precise values for your par
82. plate Fig 2 2 13a 2 How to install Phase matching 1 Slide the control plate so that its mark E is aligned with the mark W on the loading arm gear shaft See Fig 2 2 13b 2 Rotate the worm gear until the guide hole of the control cam is aligned exactly with the guide hole of the main deck See Fig 2 2 13c 3 Insert the link lever into the locking section of the control plate See Fig 2 2 13a 4 Rotate the link lever clockwise so that it is installed on the shafts in the center centre and on the left of the con trol cam 5 Fasten the slit washers at these two points Shaft of the rotary encoder guide Control plate Fig 2 2 13b Worm gear Main deck guide hole Control cam guide hole Cassette gear Control cam Fig 2 2 13c 2 2 14 Cassette Gear Control Cam and Worm Gear 1 How to remove 1 Remove the control cam by lifting it 2 Open the two lugs of the cassette gear outward and pull the latter off 3 Remove the belt wound around the worm gear and the loading motor 4 Open the lug of the lid guide outward and remove the worm gear Loading motor Worm gear Lid guide Belt Lugs Control cam Cassette gear Fig 2 2 14a 2 2 15 Control Plate 1 How to remove 1 Remove the screw A retaining the control bracket
83. ponds to each of the digit keys on the remote controller as follows Digi key 0 1 2 3 4 15 6 7 8 9 Code 20 21 22 23 24 25 26 27 28 29 e As the counter indication and remaining tape indica tion are not displayed FDP during the EVR adjustment mode check them on the TV monitor screen e When performing the EVR adjustment confirm that the FDP indication is changed to the EVR mode as shown below 3 1 EI Fig 3 1 5a EVR mode 3 2 SERVO CIRCUIT 3 2 1 Switching point Signal A1 Stairstep signal A2 e Alignment tape SP stairstep NTSC MHP Mode B PB Ss TBC OFF Equipment C Oscilloscope Measuring point D1 VIDEO OUT terminal 75Q terminated D D2 TP106 PB FM External trigger E e TP111 D FF slope F Jig RCU Code 51 or 52 8 0 0 5H e Jig RCU PTU94023B Adjustment part Specified value Adjustment tool 1 Play back the signal A1 of the alignment tape A2 2 Apply the external trigger signal to D FF E to observe the VIDEO OUT waveform and V PB FM waveform at the measuring points D1 and D2 3 Press the channel buttons simultaneously to enter the manual tracking mode This also brings tracking to the center centre 4 Adjust tracking by pressing the channel buttons so th
84. q Screw A ga d Take up head Kal o eer Lug A Control plate guide Fig 2 2 17a 2 2 18 Capstan Brake Assembly 1 How to remove 1 Move the lug A of the capstan brake assembly in the arrow indicated direction so that it comes into alignment with the notch of the main deck See Fig 2 2 18a 2 Remove the lug B of the capstan brake assembly from the main deck and remove the capstan brake assembly Fig 2 2 18a 2 2 19 Sub Brake Assembly take up side 1 How to remove 1 Remove the spring attached to the lid guide and sub brake assembly take up side 2 Bring the lug A of the sub brake assembly take up side into alignment with the notch of the main deck 3 Remove the lugs B and C of the sub brake assembly take up side from the main deck and remove the sub brake assembly take up side 2 13 i 9 Spring L sw brake E N CL assembly YZ XTA al take up side ZS ke xL Bo We SS T L Lug C Fig 2 2 19a 2 2 20 Main Brake Assembly take up side Reel Disk take up side and Main Brake Assembly sup ply side 1 How to remove 1 Move the main brake assembly take up side in the ar row indicated directio
85. relessly 3 1 1 Required test equipments e Color colour television or monitor e Oscilloscope wide band dual trace triggered delayed sweep e Frequency counter e Audio level meter e Signal generator RF IF sweep marker e Signal generator stairstep color colour bar NTSC e Recording tape e Digit key remote controller provided 3 1 2 Required adjustment tools Jig RCU Data transmitting method Depress the 3 3 button after the data code is set CUSTOM CODE C43 00 INITIAL MODE 43 A CODE 53 B CODE T DATA CODE Fig 3 1 4a Jig RCU PTU94023B e Set the switches as shown below unless otherwise specified on the relevant adjustment chart The switches that are not listed below can be set as de sired If the VCR is not equipped with the functions detailed below setup is not required AUTO PICTURE VIDEO CALIBRATION OFF B E S T D S P C PICTURE CONTROL SMART PICTURE NORMAL NATURAL VIDEO STABILIZER OFF TBC ON Digital 3R ON Jig RCU Alignment tape PTU94023B SP stairstep NTSC MHP Alignment tape EP stairstep NTSC MHP L LPF Alignment tape PTU93006 S VHS SP EP color colour bar MH 1H 3 1 3 Color colour bar signal Color colour bar pattern e Color bar signal NTSC e Color bar pattern NTSC White 100 75 z S White 75 2
86. rminal 75Q terminated EVR mode F1 Jig RCU Code 57 EVR address F2 A 11 Press remote controller 1 key twice e 1 00 0 03 Vp p e Jig RCU PTU94023B e Digit key remote controller Specified value G Adjustment tool H 1 Observe the Y OUT waveform at the measuring point D 2 Set the VCR to the EVR mode by transmitting the code F1 from the Jig RCU 3 Set the EVR address to F2 by pressing the button of the digit key remote controller 4 Adjust with the channel buttons on the VCR or on the remote controller so that the Y level of the Y OUT waveform becomes the specified value G 5 Release the EVR mode of the VCR by transmitting the code F1 from the Jig RCU again When the EVR mode is released the adjusted data is memorized Y level H rate Fig 3 3 2a EE Y level 3 3 3 PB Y level S VHS VHS Signal A1 Ext input A2 Color colour bar signal NTSC Mode B1 S VHS SP B2 VHS SP Equipment C Oscilloscope Measuring point D Y OUT terminal 75Q terminated EVR mode F1 Jig RCU Code 57 EVR address F2 A 11 Press remote controller 1 key twice Specified value G Adjustment tool H 1 00 0 03 Vp p e Jig RCU PTU94023B e Digit key remote controller 1 Observe the Y OUT waveform at the measuring point D
87. sassembly procedure for the ex terior parts and electrical parts Basically reverse this procedure when assembling them Top cover Bracket y Front panel assembly Y Display board assembly LED SW board assembly Eject SW board assembly Jack board assembly LED board assembly Y ER SW REG board assembly Y Regulator board assembly Y Rear cover 1 5 2 Disassembly assembly method lt COM section gt Step Loc No Part name Fig No Point Note 4 S1 3 S2 2 L1 L2 Top cover Bracket COM1 EES 2 53 Front panel COM2 8 L3 lt Note assembly CN7507 WR1 1 2 3 4 gt CN3011 WR2 Display board assembly COM3 15 S4 LED SW board assembly Eject SW board assembly Jack board assembly LED board assembly SW REG board COM4 2 S5 2 L4 L5 lt Note 1 assembly CN5301 WR3 5 gt Regulator board COM5 3 L6 lt Note 1 assembly CN5322 WR4 4 gt CN5321 WR5 CN5325 WR6 CN5326 WR7 CN5323 WR8 Rear cover COM6 4 S2 3 S6 lt NOTE 5 gt Fan motor lt Note 1 gt When attaching the FPC be sure to connect it in the cor rect orientation lt Note 2 gt When attaching the front panel assy make sure that the door openers of cassette housing assembly is in the down position lt Note 3 gt When attaching the FPC take care that it is not caught Pass the two V
88. ssette tape type may not be able to be identified If other value than those listed in the above table is displayed the cassette tape type is not identified 6 Cassette tape winding position The cassette tape winding position at the moment of EMG is displayed by dividing the entire tape from the beginning to the end in 22 sections using a hex number from 00 to 15 00 End of winding 15 Beginning of winding FF Tape position not identified 7 Cassette tape type Winding area Display Cassette Tape Type 00 Cassette type not identified 07 Small reel thick tape T 5 08 OE C cassette thick tape TC 10 09 15 C cassette thick tape TC 20P 0A 0B Small reel thick tape T 20 0A 16 C cassette thin tape TC 30 0A 16 C cassette thin tape TC 40 OD OF Small reel thick tape T 40 11 14 Small reel thick tape T 60 15 18 Small reel thick tape T 80 DF 160 17 1A Small reel thick tape T 80 DF 180 19 1D Small reel thick tape T 100 1D 21 Small reel thick tape T 120 DF 240 1E 1F Small reel thin tape T 140 1F 23 Small reel thick tape T 130 21 23 Small reel thin tape T 160 21 23 Small reel thin tape T 168 22 24 Small reel thick tape DF 300 22 24 Small reel thin tape T 180 DF 380 22 24 Small reel thin tape T 210 DF 420 22
89. ssette type de 0E REC tection SEARCH 11 Cassette ejected ED _ Short REV being executed after END sensor on during unloading 22 FF FE Tension loosening being executed after tape loading STOP with pinch 26 FWD SEARCH variable speed including x2 speed roller pressure on 2E INSERT REC 43 REW 47 REV SEARCH variable speed AC AUDIO DUB 6E INSERT REC VIDEO AUDIO 84 FWD STILL SLOW 85 REV STILL SLOW BE REC PAUSE AF INSERT REC PAUSE CD AUDIO DUB PAUSE EF INSERT REC VIDEO AUDIO PAUSE 3 Mechanism Sensor Information Common table of MN and HD 3 Mechanism Sensor Information Display S VHS SW RECSAFETYSW STARTSENSOR END SENSOR 0 VHS Tab broken ON ON 1 VHS Tab broken ON OFF 2 VHS Tab broken OFF ON 3 VHS Tab broken OFF OFF 4 VHS Tab present ON ON 5 VHS Tab present ON OFF 6 VHS Tab present OFF ON 7 VHS Tab present OFF OFF 8 S VHS Tab broken ON ON g S VHS Tab broken ON OFF A S VHS Tab broken OFF ON B S VHS Tab broken OFF OFF C S VHS Tab present ON ON D S VHS Tab present ON OFF E S VHS Tab present OFF ON F S VHS Tab present OFF OFF 4 Mechanism Mode Position Table of MN Display Mechanism Mode Position 1 11 5 Emergency detail information The type of the cassette tape and the cassette tape winding po sition can be confirmed based on the figure in EMG detail infor mation FDP display
90. t C Oscilloscope and 0 keys Measuring point D IC1501 pin 26 Specified value G 500 10mVrms EVR mode F1 Jig RCU Code 57 Adjustment tool AR Jig RCU PTU94023B EVR address F2 A 22 Press remote controller 2 e Digit key remote controller key twice Specified value G e Minimum level Adjustment tool H Jig RCU PTU94023B e Digit key remote controller 1 Set an audio signal mode of the RF signal generator to no signal 2 Connect the equipment C to the measuring point D 3 Set the VCR to the EVR mode by transmitting the code F1 from the Jig RCU 4 Set the EVR address to F2 by pressing the button of the digit key remote controller 5 Adjust with the channel buttons on the VCR or on the remote controller so that the level of the measuring point D becomes the specified value G 6 Release the EVR mode of the VCR by transmitting the code F1 from the Jig RCU again When the EVR mode is released the adjusted data is memorized 3 6 4 Separation 1 Signal A e RF signal Audio L ch 300 Hz 14 modulated Mode B e Tuner e EE Equipment C e Audio level meter Measuring point D IC1501 pin 26 EVR mode F1 Jig RCU Code 57 EVR address F2 A 23 Press remote controller 2 and 3 keys 1 Connect the short wire between the short point D2 and the G
91. t gear d GE E Position the projecting B sic sown SCH Coupling gear 2 Spring B Spring C 7 pring C we Spacer 1 Kg N Des Clutch gear Note e The parts with marked a have different types of mechanisms standard type or high speed FF REW type x1 Uses the standard type mechanism only 2 Uses the high speed FF REW type mechanism only d Fig 2 2 12a 2 How to install 1 Install the clutch gear spring A spring C direct gear spacer and others to the individual shafts of the main deck and finally the slit washer See Fig 2 2 12a 2 Let the spring B drops into the rotary encoder guide hole and install the change lever assembly Take care not to mistake a direction of the spring The point is to slightly lift the coupling gear and catch it from the both sides with the assembly See Fig 2 2 12b Rotary encoder guide Change lever assembly X _Spring B Coupling gear E rot A Gel T L CH m m O Main deck Main deck Fig 2 2 12b 2 2 13 Link Lever 1 How to remove 1 Remove the two slit washers 2 Remove the link lever by lifting it from the shaft retained by the slit washers Then swing the link lever counterclockwise and remove it from the locking section of the control plate Slit washers Locking section of the control
92. th an air brush in advance See Fig 2 2 25b 2 Install a new washer and upper drum assembly on the drum shaft See Fig 2 2 25a Note e When replacing the upper drum assembly replace it the together with the washer 3 Install the cap to the upper drum assembly 4 Position the collar assembly as indicated in Fig 2 2 25c while controlling its up down movement 5 Secure the collar assembly in position with a hexagonal wrench while pressing its top with the fingers 6 After installation gently turn the upper drum assembly with your hand to make sure that it turns normally Then install the brush and the spring 7 Install the rotor assembly and stator assembly according to Fig 2 2 23a and 2 2 24a 8 When installation is complete clean the upper drum as sembly and lower drum assembly and carry out the fol lowing adjustments e PB switching point adjustment e Slow tracking adjustment e Compatibility adjustment Be sure to check for compat ibility for the EP or LP mode 2 15 Lower drum assembly ee Upper drum assembly Collar assembly Upper drum assembly Fig 2 2 25c y Tighten assembly Fig 2 2 25d 2 3 COMPATIBILITY ADJUSTMENT Notes e Although compatibility adjustment is very important it is not necessary to perform this as part of the nor mal servicing work It will be required when you have
93. that the cleaned parts are com pletely dry before using the video tape 3 Lubrication With no need for periodical lubrication you have only to lu bricate new parts after replacement If any oil or grease on contact parts is soiled wipe it off and newly lubricate the parts Note e See the mechanism assembly diagram of the parts list for the lubricating or greasing spots and for the types of oil or grease to be used 4 Suggested servicing schedule for main components The following table indicates the suggested period for such service measures as cleaning lubrication and replacement In practice the indicated periods will vary widely according to environmental and usage conditions However the indi cated components should be inspected when a set is brought for service and the maintenance work performed if neces sary Also note that rubber parts may deform in time even if the set is not used Operation Hours 1000H 2000H Upper drum assembly O O A C head O Lower drum assembly System Parts Name O O Pinch roller arm assembly Full erase head Tape transport Tension arm assembly Capstan motor Shaft A gt t gt t gt t ot Guide arm assembly Capstan motor Capstan brake assembly Main brake assembly Belt Capstan O Belt Loading motor Drive Loading motor Clutch unit Worm gear O O O O O OC O O OPE gt
94. ticular country and locality 1 S40888 01 SECTION 1 DISASSEMBLY 1 1 HOW TO REMOVE THE MAJOR PARTS 1 1 1 Introduction This set is a double deck video recorder integrating a HDD Hard Disk Drive and a VHS deck Its internal structure is di vided into three sections that include the power supply VHS and HDD sections Therefore the removal of major parts will also be described under three separate sections as listed be low 1 COMMON section 2 VHS section 3 HDD section lt TOP VIEW gt 1 COMMON section 2 VHS section l J A EES EES H 3 HDD section Fig 1 1 1 1 2 HOW TO READ THE DISASSEMBLY AND ASSEMBLY Step Loc No Part name Fig No Point Note 4 S1 2 2 L1 L2 Top cover Bracket COM1 LASt 3 82 21 C2 H Front panel COM2 8 L3 lt Note assembly CN7507 WR1 1 2 3 4 gt CN3011 WR2 1 2 3 4 5 1 Order of steps in Procedure When reassembling perform the step s in the reverse order These numbers are also used as the identification location No of parts Figures 2 Part name to be removed or installed 3 Fig No showing procedure or part location 4 Identification of part to be removed unhooked unlocked released unplugged unclamped or unsoldered P Spring W Washer S Screw L Locking tab SD Solder CN WR Remove the wire WR from the connector CN
95. ton stops blinking and its function is canceled lt Reference gt 40GB HDD Custom code GI 1b Initial mode 43 A code 52 B code Gei Data code Firmware HDD driver Navigation information KBUS_OUT KBUS_IN E 08 is displayed in the IDE 40PIN case ofa communication error with the VHS SYSCON HOSTDATA 1C8001 ASIC_IF 108204 8M FLASH boot loader VHS Navi back up 1C8205 1C8206 AD 12 19 1C8207 108201 MPEG_DEC TABLE OF CONTENTS Section Title Page Hard Disk Drive HDD Important Safety Precautions INSTRUCTIONS 1 DISASSEMBLY 1 1 HOW TO REMOVE THE MAJOR PARTS 1 1 1 Introduction 1 2 HOWTO READ THE DISASSEMBLY AND ASSEMBLY 1 3 DISCONNECTION OF CONNECTORS WIRES A 1 4 SCREWS USED CABINET COMPONENTS AND BOARD ASSEMBLIES 1 5 HOW TO REMOVE THE MAJOR PARTS COM Section gt c ceeeeeee 1 5 1 Disassembly flow chart 1 5 2 Disassembly assembly method lt COM section gt 1 6 HOWTO REMOVE THE MAJOR PARTS lt VHS section gt 1 6 1 Disassembly flow chart 1 6 2 Dlsassembly assembly method lt VHS section gt 1 7 HOWTO REMOVE THE MAJOR PARTS lt HDD section gt 1 7 1 Disassembly flow chart 1 7 2 Dlsassembly assembly method lt HDD section gt 1 8 SERVICE POSITIONS 1 8 1 Service position NHS SIDE gt 1 8 2 Service position HDD side gt 1 9 MECHANISM SERVICE MODE 1 9 1 How to set the MECHANISM SERVICE MODE
96. transmitting the code F1 from the Jig RCU 5 Set the EVR address to F2 by pressing the button of the digit key remote controller 6 Set the slope of the oscilloscope to the channel having higher D2 marker level of the Y OUT waveform signal A2 Then set the 100 kHz marker level to the 4 scale on the oscilloscope In this condition adjust with the chan nel buttons on the VCR or on the remote control ler so that the D2 marker level reaches the specified value G 7 Release the EVR mode of the VCR by transmitting the code F1 from the Jig RCU again When the EVR mode is released the adjusted data is memorized 8 Repeat steps 2 to 7 in the mode B2 3 4 Adjustment part F e VR701 DV AGC 1 00 0 02 Vp p Specified value G 1 Observe the VIDEO OUT waveform at the measuring point D 2 Adjust the adjustment part F so that the Y level of the VIDEO OUT waveform becomes the specified value G in Fe rit Aur f Y level m re A EC S H rate Fig 3 4 1a HDD EE Y level 3 4 2 HDD PB Y level Signal A1 Ext input A2 Color colour bar signal NTSC Mode B SP Equipment C Oscilloscope Measuring point D TP8602 or CN8601 pin 1 Digital board e VR8604 Digital board e 1 02 0 05 Vp p Adjustment part F Specified va
97. urely tighten the three screws A Note e When the capstan motor has been replaced with a new one perform recording in the EP or LP mode for at least 2 minutes at normal temperatures immediately be fore starting the FF REW or SEARCH operations Ag ing 2 2 9 Pole Base Assembly supply or take up side 1 How to remove 1 Remove the UV catcher 2 on the removal side by loos ening the screw A 2 Remove the pole base assembly on the supply side from the mechanism assembly by loosening the screw B on the mechanism assembly back side and sliding the pole base assembly toward the UV catcher 2 3 As for the pole base assembly on the take up side turn the pulley of the loading motor to lower the cassette holder because the screw B is hidden under the con trol plate See the Procedures for Lowering the Cassette holder assembly of 1 3 DISASSEMBLY ASSEMBLY METHOD Further turn the motor pulley to move the cas sette holder until the screw B is no longer under the con trol plate in the half loading position Then remove it as done for the supply side by removing the screw B Note e After reinstalling the Pole base assembly and the UV catcher2 be sure to perform compatibility adjustment Screw A Screw A UV catcher2 3 Ss UV wc Screw B Fig 2 2 9a 2 2 10 Rotary Encoder 1 How to remove 1 Remove the screw A and remove the rotary encoder by pulling it up See F
98. ve The soldered parts have separated The drive power to the tilt motor is not supplied Connection failure soldering failure The tilt motor drive MDA IC is defective Auto recovery of the DD tilting cannot take place due to overrun EOA Supply Reel Pulse EMG When the supply reel pulse has not been generated for more than 10 seconds in the capstan rotating mode E 0A is identified and the cassette is ejected but the power is not turned off However note that the reel EMG Is not detected in the SLOW STILL mode The supply EE is not generated in the FWD transport mode PLAY FWD SEARC F etc because 1 PLAY FWD or SEARCH FF is started while the tape in the inserted cas sette is cut in the middle 2 A mechanical factor caused tape slack inside and outside the supply reel side of the cassette shell In this case the supply reel will not rotate until the tape slack is removed by the FWD transport so the pulse is not generated until then 3 The FG pulse output from the supply reel sensor is absent The take up reel pulse is not generated in the REV transport mode REV SEARCH REW etc 1 REV SEARCH REW is started when the tape in the inserted cassette has been cut in the middle 2 A mechanical factor caused tape slack inside and outside the take up reel side of the cassette shell In this case the supply reel will not rotate until the tape slack is removed by the REV transport so the pulse will

Service Manual -- JVC -- HM-HDS1U

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