SERVICE MANUAL CHASSIS 3P 15
Contents
1. Because the output of SCART always follow TV when back AV is SCART the value set to1 Instruction LISTEN PRESET off on See OP4 i Power on always bit 1 Direct On i Noise Reduce Off Noise Reduce On NTSC M Control switch TrueBass control Comb filter Control See Table 1 Service Adjustments Storage Display Range Index value Default address string NICAM control 7A NICA RGB Control 7B RGB YUV Control 7C YUV NTSC M Control 7D M Direct Key CLOCK Logo edit 7 chars amp 2 lines Logo Text i etc The LOGO edit function will take effect when Bit3 in OP4 set 1 Instruction press key VOL to choose character and press PROG to choose ASC II charater Table 1 Noise Reduce Setting for PAL Noise Reduce On Noise Reduce Off OP7 Bit 5 OPS Bit 6 Remark NTSC system preset to 2 7 gt 3 1MHz 22 Purity and Convergence Adjustment COLOR PURITY ADJUSTMENT 7 Before color purity adjustment warm up the TV set over 15 minutes and fully degauss Receive pure white signal inAV status and setthe TV receiver dynamic Goto factory mod MENU2 After write down the values of R BIAS and B BIAS set the values of R BIAS andB BIAS zero Loosen the clamp screw of the deflection yoke and pull the deflection yoke towards color purity Magnetic loop Adjust color purity magnetic loop to make the green area at the center of CR2. Horizontal paralellogram 50Hz Horizontal bow 50Hz 31 2A 5BOW 0 63 31 Instruction Horizontal shift 50Hz EW width 50Hz EW parabola width 50Hz EW upper corner parabola 50Hz EW lower corner parabola 50Hz EW trapezium 50Hz Horizontal paralellogram 60Hz oO Horizontal bow 60Hz Horizontal shift 60Hz The above value be adjusted 10 can be OK the default value is31 2c seww 3s a sewr o sewr E 39 6HSH 0 63 4 foe oO oo Instruction EW width 60Hz EW parabola width 60Hz EW upper corner parabola 60Hz EW lower corner parabola 60Hz EW trapezium 60Hz Drect key 2 Vertical slope 50Hz o nk Vertical amplitude 50Hz S correction 50Hz The above value be adjusted 10 can be OK the default value is31 EWW 3 SEWP eEWT a 5SCL 0 63 sE 6EwT_ Instruction Vertical shift 50Hz Horizontal shift 50Hz on RGB mode generally SCL can be setted to be31 31 OSD vertical position offset 50Hz Instruction Vertical slope 60Hz Vertical amplitude 60Hz S correction 60Hz Vertical shift 60Hz Horizontal shift 60Hz on RGB mode 22 5RGH 0 63 38 Horizontal shift on RGB mode generally between 30 to 42 the direct way is to connect the two Tv s SCART Adjust the Value 6VSL 6VAM 6SCL 6VSH 6RGH ee OSD vertical position offset 60Hz OSD horizontal position offset 6VOF 45 HOF 0 63 42 17 Service Adjustments Storage Display Range Index
3. Instruction of luminance so should be careful Generally it s ok when there is no black screen or picture faded change the channel under the maximal beam current 0 7X Normal IF AGC speed VG2 Brightness Volume inflexion Pre set If VOLO5 set to 40 it means when VOLUME is set to 05 by user the internal Volume is 40 This function is used to adjust Instruction structio speaker sound level VOLUME OSD curve opening time control Service Adjustments Item Storage Display Default address string value Teletext Vertical position 50Hz 5TYM 38 Teletext Vertical position 60Hz 70 6TYM 0 63 38 Instruction 71 Range Index value Direct Key 5 NVM option 1 VG2 Alignment mode 0 1 VG2 is usually setto 0 Receive 49 75MHZ PHILIPS signal press key PM to set picture to standard mode adjust FBT s SCREEN VOLTAGE knob if the screen voltage is too high the OSD high appears oppositely OSD low appears when you see the characters HIGH and LOW display by turns it means VG2 is well set Instruction YUV or Yprpb WIDE BAND SOUND PLL BLACK STRETCH AMOUNT AV2 SVHS BLACK STRETCH DEPTH XX NVM option 2 0 AVL off Auto sound in autosearch mode off Pan Europe Teletext set Off Cyrillic Teletext set Off Farsi Teletext set Off Arabic Teletext set Off Sync On Y YUV Yprpb mode off dependent on Slicing lever l noi
4. value Default address string value Vertical zoom Adjust this item when lack of vertical amplitude will lead to the Instruction picture can t be full of the screen then need to adjust the resistance s R318 R319 value White point R Direct Key Red White point G Direct Ke Green White point B Direct Key Blue The white balance can be adjusted automatically on this machine only one or two tube need to be adjusted generally the value of RED and GRN between 23 to 39 if adjust excessively will lead the picture faded Remark because of the higher colour temperature it s normal that you feel a little red Instruction Luminance delay time PAL This item has the function to adjust the luminance and colour Instruction delay change the NO on P card make the boundary of central green and purple accord with the border of above gray pane Teletext contrast Mute delay time while switch program Instruction Input standard RF signal with 1KHz sound measure UOC Instruction amplitude location is W101 of output audio RMS value adjust VOL till it reaches to 0 5Vrms 38 9MHz 2 IF frequency IFFS Seon 3 2 z Cathode drive level HDOL 0 15 2 18 Service Adjustments ltem Storage Display Range Index value Default address string value Adjust HDOL can change the voltage of R G B obviously but adjust too high may lead to fade badly reverse maybe lead to lack
5. P M in turn to enter the factory mode Press KEY 5 to enter the setting menu b Set values to OPTION 1 OPTION 7 c LOGO setting when powered on or no signal Press key CLOCK in factory menu to enter the LOGO edit mode there are two rows the 1 can set the customer s name etc and the 2 row can set to display the customer s e mail phone Press the keys PROG to select the character to edit use keys VOL to choose the charater The detailed instruction of 3P51 Some items displayed but not mentioned below is not used in 3P51 chassis Storage Display Range Index value Default address string value Fixed not Information of the factory menu RELEASE2 0 Software Version changeable ae Se aa e Fg oo Drect key 8 Initialization INIT uninitialize Press key VOL you can see the character INIT BUSY is active Exit the menu and turn off the TV after the character Instruction disappearing reopen it can have a success to innitialize Then the program has been storaged in the memorizer and then need to readjust the parameter of the factory menu 16 Service Adjustments ltem Storage Display Range Index value Default address string value Drect key 0 C ee Screen Voltage A level bright line Instruction Adjust the screen voltage under Tv standard mode and no signal input just can see the line is ok Drect key 1 D eae
6. SERVICE MANUAL 3P51 CHASSIS Design and specifications are subject to change without prior notice ONLY REFERRENCE ENGINEER BY CHECKEDBY ______ PPROVED BY _____ Service Adjustments 1 1 1 1 2 1 3 1 4 1 5 1 6 Please notice the following before debug and equipment The main power is 90 260V 50 60Hz Please be careful when you debug and equip Don t short any two soldering points which should not be shorted and don t touch any components which should not be touched Please pull out plug before equipment For safety reasons all components equipped or replaced should be identical with BOM Must be warm up for 30 minutes or more and degauss CRT thoroughly with demagnetizer before alignment The data of EEPROM must be stored before the adjustment for main chassis Tools and equipments for adjustment small screwdriver screwdriver without inductance Pattern Generator DC Regulated power supply Digital Voltmeter Sweep Signal Generator 20MHz 2 channel Oscilloscope Signal condition 13 Service Adjustments 3P51 ADJUST MENU 1 FACTORY MODE 1 Assembly line adjust mode Press S M DISPLAY and 1 H keys in turn to enter this mode 2 Engineer adjust mode Press CLOCK P M and Okeys in turn to enter this mode This mode is usually for R amp D and engineering department use 3 Press digital keys to enter every adjust page use PROG ke
7. T screen Slowly push the deflection yoke toward the front of CRT andset itwhere auniform green field is Obtained Tighten the clamp screw of the deflection yoke Restore the values of R BIAS G BIAS AND B BIAS CONVERGENCE ADJUSTMENT Receive a dotted pattern Setthe TV receiver dynamic Loose the convergence magnet clamperrrrr and align red with blu dots at the center of the screen by rotating R B static convergence magnets Align Red Blue with green dots atthe center of the screen by rotating RB G static convergence magnet Remove the DY wedges and slightly tiltthe deflection yoke horizontally and vertically to obtainthe good Purity Magnet RB G RB J Magnet Cain SZ Static Magnet 23
8. inearity 6SCL 60HZ vertical slope correction 6VSH 60HZ vertical center 6VAM 60HZ vertical size a Receive 50Hz cross hatch signal set TV to STANDARD mode press digital key 2 after enter factory mode adjust 5VSL so that picture s vertical line is just at the bottom of the half picture Adjust 5VSH to set picture vertical center to CRT center Adjust 5SCL to set proper vertical linearity Adjust 5VAM to obtain picture s vertical re display ratio more than 90 e If necessary fine adjust above items f Receive 50HZ RGB or YUV cross hatch signal set TV to STANDARD mode adjust 5RGH till picture horizontal center is at the CRT center OPTION g h Receive 60Hz cross hatch signal repeat above a b f Receive 60HZ RGB or YUV cross hatch signal repeat above items OPTION aes 5 OSD POSITION 4 6 1 Menu OSD position adjustment Receive 50 60HZ cross hatch pattern Set TV standard status Press KEY 2 in factory mode adjust SVOF 6VOF and HOF item to obtain menu OSD at the center of CRT screen 4 6 2 LOGO position adjustment Receive 50 60HZ cross hatch pattern Set TV standard status Press KEY 7 in factory mode adjust XMIN XMAX YMIN and YMAX item to obtain LOGO at the center upto 1 3 of CRT screen 4 6 3 TELETEXT OSD position adjustment Receive 50 60HZ TELETEXT signal Set TV standard status Press KEY 7 in factory mode adjust TXMI and STYM 6TYM item to obtain INDEX at the center of CRT screen 4 2 White Balance Adj
9. se NVM option 3 SWw1 English Menu English Menu Farsi Menu Farsi Menu Arabic Menu Arabic Menu Turkey menu Serbian Menu France Menu Bulgaria Menu German menu German menu Itality Menu Itality Menu Russia Menu Russia Menu NVM option 4 0 1 Narrow band sound PLL window Bit 0 small large 0 Power mode Bit 1 standby Last Memory 1 20 Service Adjustments Storage Display Range Index value Default address string value Geometry control off 0 Logo off EHT tracking mode Vertical Vert amp EW Search tuing mode sensitivity Normal Reduced Menu half tone Off On Zoom function off NVM option 5 75 OP5 0 1 223 Sound system DK Bit 0 Off on 1 Sound system BG Bit 1 Off On 1 Sound system Bit 2 Off On 1 CORINGO Bit 3 Off On 1 CORING1 Bit 4 Off On 1 AV3 Bit 5 off On 0 Switch off in vertical overscan Bit 6 Undefined ver 1 overscan Power on to last status Bit 7 Off On 1 NVM option 6 No signal OSD when no signal Blue screen or black screen 16 9 mode Child lock Lock local key Top amp bottom bar on Menu Hotel mode Set POC bit when no signal Game Instruction OP6 generally fixed to 218 NVM option 7 AV1 0 Because of AV1 is back AV if SCART needed no back AV need to set AV1 0 XX Bit 1 0 1 0 TV and monitor out select Bit 2 Monitor TV 1 Instruction
10. ustment Applied in factory KEY3 Normally this chassis can auto adjust white balance but for some CRT need to adjust white balance carefully by hand Set BRIGHTNESS and CONTRAST at normal status receive GREY SCAL and entering factory mode press KEY 3 set WPR at 31 adjust WPG and WPR to obtain white balance 4 3 RFAGCADJUSTMENT KEY 4 4 3 1 Receive 60dB RF signal Connect Digital voltmeter positive terminal to tuner AGC terminal and negative terminal to GND 4 3 2 Enter the AGC item in factory mode by the REMOTE CONTROL Method Press key S M I I in turn to enter factory mode then 15 Service Adjustments press key 4 and select AGC item by PROG 4 3 3 Adjust VOL and VOL keys to obtain 2 4V Digital voltage meter reading or just no NOISE on screen to exit factory mode Press key 5 E2PROM INITIALIZTION 1 E2PROM initialization KEY 8 We can use an empty E2PROM when making the sample TV or repairing also can use the E2PROM which has been full of data but you must follow the steps below to initialize the E2PROM Press the keys CLOCK P M in turn to enter the factory mode Press KEY 8 VOL in turn you may see the OSD BUSY after the INIT on the screen About a while the character BUSY will disappear then POWER OFF and ON the TV the initialization is completed 2 FUNCTION SETTING KEY 5 Press the keys CLOCK
11. ys to pick adjust items use VOL keys to adjust the value 4 Press DISPLAY to quit factory mode 2 B VOLTAGE ADJUST Measure C600A voltage adjust VR641 to get proper B voltage according to CRT assembly list requirement 3 RF AGC VOLTAGE ADJUST 1 Receive 294 25MHz 60dBcolor bar signal 2 Enter factory mode and press digital key 4 3 Measure tuner AGC point voltage adjust AGC item till the voltage is 2 4V or till picture noise just disappears Usually the AGC value is fixed to 27 4 FINE ADJUST 1 FOCUS ADJUST a Receive cross hatch pattern signal b Set picture to RICH mode c Adjust FBT s FOCUS knob till picture is clear 2 SCREEN VOLTAGE ADJUST KEY 0 a Set picture to STANDARD mode without signal input b Enter factory mode and press digital key 0 c Adjust FBT s SCREEN knob till VG2 voltage flag changes between LOW and HIGH press PROG key to enter other menu 3 HORIZON ADJUST KEY 1 a Receive 50HZ monoscope PATTERN Set TV to standard mode Press KEY1 to enter factory mode b Adjust SHSH for 60Hz picture its is 6HSH to set picture horizontal center to CRT horizontal center c Receive 60HZ monoscope PATTERN repeat above b item 14 Service Adjustments 4 VERTICAL amp YUV RGB HORIZON ADJUST KEY2 S5VSL 50HZ vertical linearity 5SCL 50Hz vertical slope correction S5VSH_ 50Hz vertical center 5VAM 50Hz vertical size 6VSL 60HZ vertical l
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