YES - Simon`s Hall of Electric Pianos
Contents
1. BOLIAT 193 1 2 1 5 FO 2 1 1 T l zZZ il lt 22 0 1 HAZL Tani 1 3 5 4 50 11 ON 299915373 3 5 31111 SIONITII B ivaa NOISIAIa ANYGWOD YSZLITUNM JHL 6062 ON 791435 ONILHVLS ONVid 2JINOH I2313 sori 13200W LI 3812 Q3l 201 dH H3IMOBH INIT MiwoHdH 50 Bi 31243 09 05 H3 Cd LOA 411 og 65 2344 HOLY131250 2 2 gt WHOIS 104100 danza F E 3 i ri Gi Ti 0q 8 3 27 vp 749 Gc m gange Aga H3AI MO v 4 ganr 2 ool ve 66 olarw 330A 7TwHH31x3 aL wool 16 13009 ONVId 91490315373 2ILVW3H2S2. WURLITZER ELECTRONIC PIANOS MODELS 200 203 203W 205V 206 207 207V 214 214V amp 215V SPECIFICATIONS AND DESCRIPTION MODEL 200 200A PROFESSIONAL PORTABLE Keyboard Range 64 Notes A 13 thru C 76 Height From Floor to Top of Keys With Legs 28 5 8 Height of Case Less Legs 7 1 8 Height From Floor to Top of Case Not Including Music Panel 33 Overall Width 40 Overall Depth 18 9 16 Weight Less Legs and Pedal 56 Ibs Legs Removable chrome plated steel legs two of which have leveling glides MODELS 203 203W 206 205V 206 207 207V 214 214V 215V amp 270 The Models 203 and 203W are home consoles For Group Piano Instruction the Model 206 is the student console and the Models 205V 207 and 207V are teacher s consoles The Models 214 214V and 215V are classroom consoles The Models 207V and 214V have the switches wiring and plugs installed for use with the Model 208 Key Note Visualizer The Models 205V and 215V are similarly equipped to operate the V 500 Key Note Visualizer The Model 270 is a butterfly grand using similar internal assemblies as the Model 200 Keyboard Range 64 Notes A 13 thru C 76 Height From Floor to Top of Keys 28 5 8 Height From Floor to Top of Keys Model 270 27 1 4 Overall Height Not Including Music Panel or Casters 32 7 8 Overall Height Not Including Music Panel Model 270 34 Overall Width 40 Overall Width Model 270 41 Overall Depth 18 9
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4. foori remove the screws ot arrows ond hinge bock as fown GROUP GROUP GROUP GROUP G D PIANO Ensemble Switch Bulb amp V PT 7 131 098 1768 vO 31 MODELS 206 AND 207 TROUBLE SHOOTING CHART Following is a complete check out procedure with trouble shooting hints NOTE Useful service tools for making these checks are 1 2000 ohm headphone with a 5 MFD 35 volt or greater capacitor in series for D C blocking 2 A small tape recorder with pro grammed music or a small transistor radio These should have an appropri ate patch cord to connect the tape recorder or radio in a phone jack or phono jack The headphone assembly will be used as a signal tracer The tape recorder or radio will be a second helper pro viding an audio signal from a second piano The signal from the sound source will be inserted into the micro phone input This will simulate a person playing the piano for signal tracing purposes For trouble shooting of 207 teacher s lab console and 206 student pianos see 207 check out procedures starting on Page 26 NOTE The following complaints could happen on all six models These are followed by a sec tion strictly applicable to 2065 and a 207 in a lab installation Complaint Piano Dead No Sound Make sure AC power is available at wall outlet Cause 1 No AC power Pilot light will not light Correction 1 1 C
5. 2 201785 5 201793 201782 6 201794 3 viEWS p 5 MIDDLE TREBLE DAMPER FELTS HAMMER BUTT ASSY 205201 9 16 205172 WHIPPEN amp DAMPER SCREW 11 16 205171 HAMMER BUTT SCREW 17 WURLITZER TOOLS FOR TECHNICIAN THESE TOOLS MAY BE OBTAINED FROM ANY REPUTABLE TUNERS SUPPLY HOUSE ITEM Key Easing pliers Punch for tightening key bushings Key bushing wedge clamp Sandpaper file 2 Tweezers 8 Capstan wrench Screwdriver with finder Franklin Tite Bond 2 os bottle Long fine needles pliers Felt cutting knife Soldering iron E P tuning Extra tip 3 ANY LOCAL HARDWARE STORE 4 Solder for adjusting reeds Exacto knife tuning reeds Tool amp dye file for filing shank of reed Feeler gauge flat blade type 5 No 21 drill 159 dia for bal hole for drill part mounted in wood handle Xcelite Nut driver 1 4 Xcelite Nut driver 5 16 Xcelite T Handle 6 Xcelite Nut driver 7 16 Xcelite Nut driver 7 32 Phillips screwdriver 10 shank 2 4 Nickelson Mill bastard tuning Tack puller Fuller 409 for lifting keybeds 6 Ruler with slider 7 WURLITZER SERVICE DEPARTMENT Key dip block Silicone Kit 8 Holly Springs straight edge Supply of paper punchings front rail assorted Supply of paper punchings balance rail assorted Supply of paper shims keybed assorted 9 Service Manual up to date for 200A E P notes green Strobe tuner 1
6. C Inside the case you will find a covered board with elastic straps designed to hold the piano legs and the expression pedal fig 2 During initial ship ment of the empty case this board is secured by two metal clamps located at each end Using a Phillips screwdriver remove these clamps fig 3 and dispose of them Now take the board out of the case Place the piano bench in the bottom of the case fig 4 with the bench legs alternated alongside Slip the music panel under the elastic straps in the top as shown be sure the rack lies in with screw arms facing you fig 4 Place the Electronic Piano over the bench parts in the carrying c se with keybed toward the front handle fig 5 fig 5 Alternate the piano legs through the elastic straps on the board fig 6 Then place the expresston pedal into position through the straps provided PREPARATION OF THE PIANO FOR SERVICING SEE FIG 1 amp 2 Page 4 Unplug the piano from AC outlet To remove the top assembly remove the three 3 Phillips head screws that hold the keyslip down to the keybed take out the two 2 screws that hold the music panel in place remove the control knobs It may be necessary to pull the front of the top slightly forward to clear the shafts which hold the control knobs Unplug the plastic speaker plug located at the left hand corner on the top of the chassis assembly Lift the keyslip portion unti
7. Noisy or loose keys can tightened with a key bushing lightener Insert the tool into the key bushing and tap lightly with a small hammer This tool may be used on the balance rail key bushing or the front rail key bushing A key bushing tightener can be obtained from any reputable tuners supply house SEE FIG B FIG KEY BUSHING TIGHTENER LOCATIONS OF ACTION CENTERS i MES gt FIG TREATING ACTION CENTERS INSPECT ACTION FOR FREE CENTERS First check the butt centers by raising the butts from the hammer regulating rail and allowing them to fall abruptly observing the movement of the butts If the butt centers are free the butts will fall back to the rail without any hesitation Whip centers are checked by depressing the full sustaining pedal to remove all damper spring tension from the whip assembly Fully depress each key and release it slowly If the key does not completely return or if it returns very slowly the whip centers are probably sluggish Keys must course be properly eased before this inspection is performed If the action centers are sluggish treat the action centers according to the procedure which follows TREATING ACTION CENTERS If the action centers become sluggish they must be treated to restore the proper amount of freedom If treatment is necessary all action centers should be treated The treating solution
8. 18120420 euoudoioTW pug 25 207 CHECK OUT PROCEDURES The instructions in paragraphs three four and five for checking group They will also apply to groups and in paragraphs eight thru fifteen To check 207 at least two 206 5 are needed SEE FIG 5 amp 6 PAGE 24 1 Connect groups to 207 A B One group on connector A One group on connector B 2 Start position A B 206 a Volume maximum b Self position Ensemble self speaker sw 207 a Piano volume maximum b Mic volume maximum c Instruct switch phone position d Black tabs up White tabs up f Red tab up g Lighted tabs yellow center h Audio Aids up top 3 First Check Self A B 207 Black tab A down b White tab 1 down 206 A group set to 1 position piano select switch Two way communication should be heard Check remaining 207 piano tabs and student selector switch position 2 thru 6 Two way communication on all like settings No communication on unlike settings BAD COMMUNICATION ON LIKE SETTINGS If the teacher cannot hear her 207 it has a wiring problem between the power amplifier and the headphone Refer to Schematic Part 4811 1137 202822 If the student cannot hear his own 206 it has a wiring pro
9. This will allow the reed bar to be moved backward and forward From this you can determine which way the hammer needs to be moved To move the hammer take a soldering iron and heat at the base of the hammer stem where it meets the butt assembly SEE FIG Q Thermal glue is used here After glue is soft the hammer stem can be moved forward or backward to the appropriate location FIG Q 13 19 TUNING THE ELECTRONIC PIANO REED The REED is the tone element of the Wurlitzer Electronic Piano Its tuning position in the instru ment and how this position relates to the pick ups are essential to the tonal quality of the piano INSTALLING NEW REEDS The reed s re taining hole is slightly larger than the diameter of the reed screw When putting a new reed in place for tuning be sure that the reed is as far BACK as it will go SEE FIG Additionally before beginning to tune insure that the reed screw is tight NOTE the reed screw washer is dish shaped This washer should not be flattened Tightening the screw after the reed has been brought up to pitch will cause it to go sharp and lead will need to be added to the tip and the reed retuned BACK FRONT FIG R Tuning is accomplished by removing the lead from the reed tip by filing or scraping a small amount at a time Continue to remove the excess lead until arriving at the proper pitch If the reed is flat the pitch can be raised by
10. cord standard TOP ALL FOUR MODELS ABS Acrylontrile Butadiene Styrene molded plastic top hinged at the back Secured to the keybed with three 3 screws thru the keyslip Model 270 has a finished all wood case walnut PEDAL SUSTAIN Lifts dampers permitting tone to sustain as in a conventional piano Detachable on Model 200 portable built in on console models OPTIONAL EQUIPMENT Model 206 Bench is optional as well as the special A C cable Model 8315 permitting 206 to be taken out of a lab installation and used as a separate or individual piano Models 200 and 203 Bench and headphones optional CARRYING CASE FOR MODEL 200 PORTABLE A heavy duty carrying case Model 233A is available thru the Sales Department See pages 6A and 6B for photos and instructions for use CARRYING CASE MODEL 233A for WURLITZER ELECTRONIC PIANO MODEL 200 A Remove the case from the shipping carton fig 1 To open lay case flat on floor and unlatch the four locks Note the locks are placed in different positions on each side of the case to avoid improper closing caster placement B Inside the case is a box containing four 1 5 chrome casters to be attached on the bottom or end of the case as you see fit These casters are designed primarily for use indoors on floors or carpet if the case is to be moved on sidewalks or on any rough ground it is suggested that you purchase 2 or larger rubber casters
11. 03 or four 8 round 203W 205V 8 round 8 ohm 206 Two 4 x8 oval 16 ohm or two 8 round 206A Two 8 16 ohm 07 One 6 x9 oval 8 ohm or one 8 round 8 ohm or two 8 round 8 ohm 07V Two 8 round 8 ohm 214 214 http www oldschool sound com Page 5 Troubleshooting the Wurlitzer 200 Series Amplifiers 215V 270 Two 8 round http www oldschool sound com Page 6 Troubleshooting the Wurlitzer 200 Series Amplifiers Frequently Asked Questions Question just bought a 200A from a music store and I was wondering how long Wurlitzer made them I m guessing roughly 1961 1970 is that close I m still trying to find out exact dates of manufacture pertaining to model years but it appears to me all I have to go on right now are schematic dates that the 200 series came out around 1967 68 the updated 200 A came out around 1972 73 and the 200 B around 1979 80 Question was wondering were can get the manual for the wurlitzer 200a and the cost of it thanks Morelocks Organ Service has the real deal manuals for ALL the Wurlitzer Electric Pianos The 200 series manuals cost me 18 00 plus actual shipping and it covers all the 200 series models Question Is there a wurlitzer 200 and 200 A or is it normally referred to as the 200 Yes there is indeed a 200 AND a 200 A as well as a 200 B These models have IDENTICAL actions cases legs sustain pedal etc The difference is in the Amplifier T
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13. However the adjustment is the same On all console model electronic pianos the pedal is built in but the adjustment is the same as covered on the 200 portable A cable clamp is located about eight 8 inches below the knurled nut SEE FIG M KEYBED KNURLED NUT RETAINING SCREWS FIG M 18 VOICING This is the most important aspect of the entire action regulation procedure This insures the tonality volume and ring time of the individual notes are uniform and consistent Loud notes soft notes and notes that have a piercing tone will be eliminated Voicing is accomplished by adjusting the pickup SEE FIG so the flat surface of the steel reed and the face of the pickup are in the same plane The same procedure is used in the bass with the lead down and the treble with the lead up Positioning of the reed in this manner is very important especially on the smaller reeds HOUSING ASSEMBLY CABLE NOTE PEDAL SHOULD BE ADJUSTED TO LIFT THE DAMPERS TO THE SAME HEIGHT THE DAMPERS ARE LIFTED NOTE 15 STRUCK WHEN A SINGLE FIG N lt eA CORRECT PICKUP rt 12 PICKUP REED PICKUP REED SPACE CORRECT When a reed rest is positioned inside the pickup a very strong undesirable harmonic will be generated Reeds should be positioned as close to the center as possible SEE FIG N An automotive feeler gauge makes a good tool for checking the clearance on eac
14. features rectangular shaped pins rather than the traditional round ones Including the description round pins or square pins on your parts order will insure the proper type of cord to be sent Model 200 203 206 207 Subject Failure Output Transistors References Schematic Piano Amplifier 11 0783 When called upon to change output transistors in the Electronic Piano check the following items to ensure they are in good functioning order Check for the following 6 1000 mfd 50 VDC Intermittent c 9 500 mfd 50 VDC Intermittent IR 14 200 mfa 5 watt resistor Noise 8 68 ohms 5 watt resistor Noise IR 7 200 ohms 5 watt resistor Noise IR 10 2 7 ohms 1 watt resistor Open MODEL 200 Series Electronic Pianos Subject Connecting external amplifiers Reference 200 Series amplifier Schematic No 11 1305 S 1 The most satisfactory point to obtain a signal for driving an external amplifier is at the auxiliary output jack As the piano is wired this signal is taken from point 7 signal and point 1 ground It has been noted that in some cases this circuit does not supply sufficient drive signal to the external amplifier input In other cases a hum is introduced into the external amplifier The following circuit has been found to correct these conditions Change the 100K resistor between points 6 and 7 to a 6 8K and the 15K resistor between points 1 and 7 to a2 2K The maximum signal is approximately 5 volts pea
15. mounting hole in heat sink D Be sure the heat sink has no burrs that could puncture the mica 3 Bend center lead of new transistor A Use two 2 long nose pliers B Grip transistor leads C Bend center lead D Grip center lead E Bend center lead 4 Use new heat sink compound A On face of heat sink B On back copper side of new transistor 5 Using a new mica washer and a new conic washer stack and secure parts as shown 6 Tighten screw with about six inch Ibs of torque hand tight 7 Now solder leads to p c board 27 YOU WILL NOTE THERE HAS BEEN A CHANGE OF PART NUMBERS AND TRANSISTORS WHICH MAY TEND TO CONFUSING UPON REPLACEMENT BELOW IS A LISTING OF PARTS PART NUMBERS AND THEIR REPLACEMENTS IN ADDITION PLEASE NOTE LOCATION OF TRANSISTORS BEFORE REPLACEMENT NEW PART NUMBERS OLD PART NUMBER MANUFACTURER S OLD PART NUMBERS MANUFACTURER S MODEL amp STARTING MODEL amp STARTING EQUIVALENT MODELS AND APPROX EQUIVALENT SERIAL NUMBERS SERIAL NUMBERS STARTING SERIAL NO 200 73257 200 58050 200 55900 203 73414 203 56403 203 55256 214 73397 203W 56491 206 56501 206 57144 207 54029 207 55921 21457777 21457776 11 0778 2N2926 11 1667 2N6008 11 0778 2N2926 11 1668 2N5998 11 0778 2N2926 11 0778 2N2924 11 0775 2N5306 11 0775 2N5306 11 0778 2N2926 11 0778 2N2924 11 0778 2N2926 11 0778 2N2924 11 0774 2N3859A 11 0774 2N3859A 11 0770 2N4919 11 1502 MJE2371 11 0772 2N5181 11 1501 MJE20
16. removing lead from the tip If the reed is sharp the pitch can be lowered by adding lead to the tip or moving the reed as far forward as possible While removing the excess lead it is very im portant to maintain the PYRAMID shape of the tip SEE FIG S Remove lead from the tip by filing or scraping a small amount at a time Try to remove the lead evenly so the weight remaining on the tip will be evenly distributed SEE FIG S A lop sided tip can affect the motion of the reed as it vibrates When tuning a new reed removing too much lead will cause the pitch to be sharp too high Moving the reed to the FRONT will drop the pitch from 2 to 5 cents and permit fine tuning without having to add additional lead to the tip If moving the reed to the FRONT does not sufficiently lower the pitch remove the reed add lead to the tip by using a soldering iron and rosin core solder A low heat is best so a small drop of solder can be added without melting the lead to make it flat and then fine tune the reed by filing it to remove the excess 14 20 When tuning new reeds pitch tolerances should be kept to within 5 cents 2 to 3 The tuning process is often made easier with the use of a strobe type tuner PROPER REED TIP PYRAMID GOOD BAD 7 FIG 5 REMOVING ACTION PARTS It is not necessary to remove the action from the piano to replace a butt assembly or a damper lever It is necessary to remove the actio
17. the cable The material is available at most hardware stores Sticky Keys or Sluggish Action Refer to page 2 Preparation of the Piano for Servicing for information on how to dismantle the piano and follow ing this it describes easing keys and shrinking action centers One or More Notes That Are Extra Loud or Harsh Check to see if the reed involved is slightly off center in the pickup or electrode If so loosen the reed mount ing screw center reed and retighten screw If the reed is centered and still too loud bend the ends of the pickup up slightly 1 32 to 1 16 Do not bend the reeds this makes them go flat in pitch Duds or Reeds that Ring A Very Short Time and Die Out This can generally be corrected or at least helped by loosening one at a time the four screws that mount the reed bar to the action brackets If it can be determined which screw when loosened helped the most remove the screw and place a paper front rail punching 010 to 025 thick under the reed bar at that hole and put the screw back in and tighten It is generally a very slight twist to the reed bar when fully tightened down ihat causes short ringers or duds Troubleshooting the Wurlitzer 200 Series Amplifiers Troubleshooting the Wurlitzer 200 Series Amplifiers This text is directly taken from the Wurlitzer 200 Service Manual notes Electronic Piano Note 23 April 15th 1971 200 Series Amplifiers 1 De
18. 16 Overall Depth Model 270 37 1 2 Weight Model 270 Approx 150 Ibs Weight With Legs amp Lyre Model 270 160 Ibs NOTE The Following Information Applies to All Models Except as Noted BENCH Wood bench with removable chrome plated steel legs two of which have leveling glides KEYBOARD Sugar Pine keyboard naturals are covered with white Implex plastic sharp tops are black molded plastic ACTION Wurlitzer manufactured action employing conventional action parts such as whips butts flys jacks dampers etc Regulates Like a Conventional Piano Action HAMMERS Three ply maple covered with mothproofed felt TONE SOURCE Hammers strike steel tone producing elements causing them to vibrate in a polarized electrostatic field SPEAKERS Following is listed the various models showing the description and number of speakers used in these instruments Model 200 Two 4 x 8 oval Model 203 Two 4 8 oval plus two 8 round or four 8 round Model 203W Four 8 round Model 205V Two 8 round Model 206 Two 4 x 8 oval or two 8 round 207 One 6 9 oval or one 8 round or two 8 round Model 207 Two 8 round Model 214 214V amp 215V Four 8 round Model 270 Two 8 round Refer to schematic diagram for matching output impedance to speaker impedance POWER REQUIREMENTS ALL MODELS 40 watts operated from 117 volt 60 Hertz A C Three wire center grounded A C
19. 2 1 926011 N S ILNVLS ov 06105 ON Ld dow ONILOENNOD L gt a lluar TIT D EEE I2 13 DL 3 L2 I2 TT E 7777777 ettet ea 4 a Ld ONILNNOW TANYA OISOW 17 21 gt lt lt b Cable Assembly Pt 201744 ES Recessed 10 Pin Socket Pt 202154 MODEL 207 with Lower Front Panel Removed Note New Junction Box DESCRIPTION OF THE 207 TEACHER S CONSOLE Four groups of from one to six Model 206 student pianos in a group can be connected to a Model 207 Teacher s Console Piano Each Model 206 student piano in a group is connected to the next student piano by an external jumper cable assembly Each group of student pianos is connected to the Teacher s Console with a master cable SEE FIG 5 PAGE 24 The Model 8309 cable assembly is made up of the master cable and five jumper cable assemblies Line voltage 117 VAC is applied to the 207 SEE FIG 5 PAGE 24 and supplies power to the system through the master cable and jumper cables There is a shielded high impedance common line forensemble This ensemble line collects the output of each 206 student piano for group communications addition there are six low i
20. 21 11 0773 2N5194 11 1503 MJE2011 CHANGEDI NEW ITEM PART NUMBERS D 1 D 2 11 0769 GE A13 1N4005 D 3 D 4 202050 11 0771 GE A13 1N4005 11 1500 11 0769 0 5 0 6 202049 11 0781 1N4148 11 0781 SEE PAGE 37 FOR TRANSISTOR LEAD CONFIGURATION MICA APPLY SILICON GREASE TO AREA OF HEAT SNK amp 9 amp BEFORE ASSEMBLY 0772 1 0770 0773 0 4 40 x e iG SLOTS TRANSISTOR SEE PRINTED CIRCUIT BOARD PAINT 11 0764 SEE PRINTED CIRCUIT BOARD PRINT 11 1306 PRINTED BOARD P N 11 0765 PRINTED BOARD P N 11 1258 5 3 1080 USE NO MORE THAN 6IN LBS TO SECURE TRO amp MICA APPLY SILICON GREASE TO MICA AREA OF HEAT SINK 11 1502 11 1501 1503 TRE 9 10 BEFORE ASSEMBLY 202055 202056 2020 6 2371 MJE2021 MJE 2011 SINK TRANSISTOR 4 NYLON WASHER 40 NYT KEPS 94 40 LG SLOTS CONICAL WASHER 5 6 32 x ibas 28 Q30NvHi1 438402 7134 034 O w v 228 HOWE 031 2 X 2 0 wa 18 AH 4 H 1 ONIT6Hl 9HL 3 Sqv37 YOLSISNYHL 1 n ij HYI 30VH5AHM 51075 Za Vy WNIS hl 49 09 G 2NO2 2023 3 0181 9 681 pi 380236 OL 9 18 355 380338 01 6 881 380 O
21. 8 PROCEDURES FOR SERVICING MODEL 270 BUTTERFLY GRAND ELECTRONIC PIANO To remove the MUSIC PANEL remove the two screws located behind the panel and lift upward See Fig 1 p 19 itis not necessary to remove the music panel to service the piano Removal of the MUSIC DESK Remove the four screws located in back of the music desk These screws run horizontally through the lip of the BAFFLE SHELF amp SPEAKER ASSEMBLY into a hidden lip of the music desk See Fig 2 page 19 Slide the music desk toward the keys until the under brackets are free Lift the music desk up and out of the piano See Fig 3 Removal of the TUNING PIN COVER Lift the cover up and out of the bracket screws See Fig 4 Removal of the REED BAR SHIELD Loosen the screws located along the front side of the shield and lift the shield up and out of the piano See Fig 5 After removing reed bar shield you are now free to work on the KEYBOARD AND ACTION See Fig 6 page 19 NOTE For regulating pro cedures refer back to page 3 To remove the BAFFLE SHELF amp SPEAKER ASSEMBLY loosen and remove the six screws located around the perimeter of the shelf See Fig 7 page 20 Loosen and remove the left and right bracket screws See Fig 8 page 20 Care fully lift the baffle shelf amp speaker assembly up and out of the piano making sure you discon nect the speaker plug See Fig 9 amp 10 After removing the baffle shelf and speaker assembly y
22. I really enjoy is the one used by supertramp Do you know which model do they supertramp use I BELIEVE that supertramp used 200A for all their recordings They also doctored the sound using compression chorusing reverb etc I m currently researching this subject Question I ve seen some models selling on the ebay for example There is an EP200A in auction that has a broken middle C reed and has no sustain pedal Is the broken reed a bad sign Can the piano be in a bad shape from an internal point of view or a broken reed is somehow usual The reeds can be broken rather easily this is a common problem I wouldn t worry about it too much since it happens fairly often especially with players that like to hit hard to get that barking tone that rockers like so well Can it be easily replaced is it expensive Yes they can be replaced pretty easily and the parts are available and fairly inexpensive Once again click HERE to gets parts information http www oldschool sound com Page 8 81v5i38 025 83ZLI180M JHL S 02 0 DILVW3AHOS 906201 1913 15 104100 NOILONGOYd 3177 310 O9ILVW3H9S ONVId 910319313 13G0W CIMAS 3 v2 31vNH310v 7 4 9906 1 1 ve 4 02 6 2 1 199206 11 54502 11 91 3 3 814602 211 614502 9 i Or ML 1661261 6 Ux
23. N 3SN 1 WNIS 1Y3H 40 YOIM OL 3SV3H9 21715 YOIN 02 A 002 N 1O4LNOO ON LNdLNO XAY OL 4102 W 902 W O1 SNOLLO3NNO2 379 gt 7174 OL IHA H34v3dS HO 7OBINOS 70H1NO2 104100 OL 3 110 OL OLVYBIA OL NV HOIC 3 wS 1 l 3708v2 UL T q3o73i4s UV 55 27 4 E gt ONOHd HO uite INE 6 6 IMIN YOLINOW igit iS ost Gr 4 Ss v v 33 CIA KO dvd 0338 x Vj Or e 5 0 SHOLSISNVHL 114100 40 LNZW3OVIdd3H OL NV SV 051 TIIM SIHL SWHIM 40 ONIGOD 40700 AJIINSGI 11 1 AHL Wald TdWy ONVId 1 1 ATA FHL 804 SNOILONULSNI 8 211002 34 902 Siexyeads 8 z 691102 e 6140707 734 3904 08610 734 qouy 694202 944202 Id 4 lt 8 38 891202 134 AT quessy 31945 80 5 4 058102 34 8qouy 258102 19484 m Um P To service Communication Center
24. a new power cord for my Wurlitzer electric piano model 200 and I was hoping that maybe you could steer me to where I could get a replacement ALL parts are available at Morelocks Organ Service I have their information as well as other places to buy parts and manuals HERE Question I ve tried to no avail to find info on Wurlitzer organs or the Wurlitzer Company If you can point me to any relevant sites or provide any info it would be greatly appreciated http www oldschool sound com Page 7 Troubleshooting the Wurlitzer 200 Series Amplifiers I get LOTS of E mail on this subject No offense but I DON T do organs But seriously folks here s some links i ve found on that subject e Mitatechs This is a HUGE site One could get lost here for a long time Look here for every bit of info anyone could conceive pertaining to Organs e Baldwin This famous Piano manufacturer bought Wurlitzer back in 1988 and they have all the info for the acoustic pianos division of Wurlitzer Question Ihave a model 200 I think which buzzes quite loudly I was informed that it was because the ground was not connected I attached an entirely new power cable and yet the buzz persists how do I make it quiet The first thing to check is all the grounds INSIDE the piano Many times these pianos are serviced and an internal ground was left off or loosely attached I ll be posting an entire Troubleshooting section very soon Question The wurly sound that
25. ad Amplifier Pilot light does not light A 2 Blows line fuse B C D 3 Blows output transistors J L M N O P See Note 1 Distortion 5 15 Low Volume 6 Static E F H I J T 7 Hiss and noise can control with volume control E F I J K T 8 Hiss amp noise cannot control with volume control 7 U I g amp F 9 Hum C E F 10 Tremelo dead Q R AC line fuse open Shorted rectifiers D 2 D 3 C 6 Shorted output transistors Cracks or poor solder joints on PC board Poor ground on input cable 1 use GE style 11 0778 or 651891 yellow or green R 40 R 36 R 45 R 66 replace with deposited carbon R 14 R 7 R 8 C 9 C 18 too close to R 14 R 14 noisy R 10 high in value D 4 Burr on heat sink puncturing mica washer Use one mica under output and driver transistors with heat sink compound on both sides TR 4 C 53 C 46 D 5 Open or shorted coupling capacitors Reed striking pickup 5 TR 6 CHAROTVOZZO ASO http www oldschool sound com Page 1 Troubleshooting the Wurlitzer 200 Series Amplifiers Note 1 Inspect C J L and follow P prior to turning piano on after replacement of output TR S ELECTRONIC PIANO 200A Before ordering a new AC power cord for a model 200A check to see which type of pins is used in the receptacle of your piano Recently a new connector has been introduced which
26. blem between the power ampli fier and the headphone Refer to Schematic Part 11 0783A 202821 If the students and teacher can hear their own piano but cannot hear each other there wiring problem between the 207 switching and the 206 switching COMMUNICATION ON UNLIKE SETTINGS This is commonly called cross talk This can be caused by improper or no audio ground anywhere in the system Check piano select switch SEE FIG 8 PAGE 30 making sure it is selected to the respective piano Check for shorted leads 4 Second Check Ensemble A B NOTE C NOTE 207 a Black tab A down b White tabs up c Lighted tab group A up red 206 A Group a Ensemble position self speaker switch b Slowly rotate piano select switch from 6 thru 1 position Two way communication should be heard on all positions 2A If the teacher cannot hear her piano there is a problem between her power amplifier and her headphone amplifier or between her headphone and the associated amplifier TR 2 TR 3 Schematic Part 411 1139 202520 which could also be defective If the teacher cannot hear the student the problem lies between the student s piano and its associated switching and the teacher s con sole and its switching mechanism If the teacher can hear the student s piano but the student cannot here his own piano or the teacher s the problem lies in the teacher s Switching or the associa
27. bottom other screws and has a washer located under the chassis 5 Remove the Pre Amp Board located at the top center of the reed bar by loosening the two 2 1 4 hex head screws 200A only 6 Lift up the entire chassis assembly being careful not to damage the two phone jacks mounted on a bracket at the bass end 7 Replace the front mounting screw and washer in bass action bracket The keys and action are now exposed for any necessary regulation MODELS 203 203W and 214 HOME CONSOLES Follow the same procedure as for the Model 200 for steps 1 thru 7 If there is a square white plastic plug and socket located above the printed circuit board unplug and remove the chassis assembly caster placement If there is no plug at this location remove the three screws that hold the round mounting plates for the headphone sockets at each end of the keybed Also remove all cable clamps used to dress the wires leading to these jacks Remove the lower front panel by removing the four wood screws across the top of the panel Unplug or unsolder all cables going to the lower front panel MODEL 206 STUDENT CONSOLE Follow steps 1 thru 7 as described for the Model 200 If there is a square white plastic nine pin plug and socket located above the printed circuit board unplug it and remove the entire chassis assembly If there is no plug at this location remove the three screws that ho
28. ck in place start mounting screws but do not tighten Be sure all jacks are placed properly by depressing each key If a key is jammed the jack is not installed correctly and must be adjusted or tripped After the keys are operating tighten mounting screws Connecting External Amplifiers for Model 200 only The most satisfactory point to obtain a signal for driving any external amplifier is at the external output jack As the piano is wired this signal is taken from point 7 signal and point 1 ground In early production amplifiers the resistor between points 6 and 7 R 75 should be changed to a 6 8K the resistor between points 1 and 7 R 76 should be changed to a 2 2K and the 5 mfd capacitor between points 5 and 6 should be removed and replaced with a jumper wire The signal output level will now be approximately 0 5 volts Should the external amplifier require more output signal to drive it the position of the 6 8K resistor and the 2 2K resistor may be reversed Refer to amplifier piano P C board assembly drawing 201808 S 1 E 1 in the back of the service manual 15 gt gt mam v Pte A LA vow om wm mu ACTION PARTS HAMMERS 8455 MIDDLE DAMPER LEVER ASSY 205226 WHIPPEN ASSY 205339 PARTS FOR HAMMERS amp DAMPER FELTS 1 201775 4 201792
29. consists of eight 8 parts of V M amp P Naphtha and one 1 part of silicone liquid V M amp P Naphtha can be purchased at most paint stores Damper flange centers hammer butt centers fly centers whip centers and damper sticker centers are possible points of sluggishness and all should be treated Apply silicone solution freely at these points making sure the action centers are completely wet Application of the silicone solution can be made with a small plastic squeeze bottle with nozzle SEE FIG C TL ALT 5 ON 1060 The response to the silicone solution treatment should be immediately apparent CAUTION should be used when applying Key covers can be damaged or reeds may go out of tune if spilled on The silicone solution should be applied before regulation for best results if needed Silicone and applicator kit is available from DeKalb Illinois Service Department Never re pin a sluggish or tight action with a center pin that is smaller in diameter than the original center pin The pin will be tight in the felt bushings and become loose in the wood The wood will become the action center This type of repair will not last long and will create a rubbery feel to the keyboard 5 INSPECT ACTION Tighten all screws Does not include Requ iating Screws B Check the damper levers for squeaks Use a soft lead pencil to apply graphite to the teflon
30. dampers are adjusted by turning the damper regulating screws which pass through the neo prene grommets at the back of the damper levers SEE FIG L The dampers are properly regu lated when a gap of approximately 035 exists between the top of the grommet and the bottom of the screw head The damper regulating screw has a slotted hexagonal head and either a screw driver or a 7 32 nut driver may be used to ad just this screw PEDAL INSTRUCTIONS To attach the sustain pedal to the Model 200 portable piano thread the knurled cable nut inside the aluminum housing onto the damper connecting rod through the hole in the bottom of the instrument Turn until it bottoms against the nut on the rod There should be a very small amount about 1 32 to 1 16 lost motion in the pedal before it starts pushing harder and lifting the dampers This assures that the pedal is not holding some dampers off the reeds To adjust DAMPER REG SCREW 1 32 GLUE SHIM 4 N 76 NUT DAMPER CONNECTING ROD 11 the pedal loosen the two round head Phillips head screws that secure the top of the cable to the aluminum housing Pull down on the cable to remove lost motion or push up to get more lost motion The pedals are set at the factory and generally will not need adjustment unless the cable has slipped through the clamp Some pedals have two 2 Allen head set screws that clamp the cable as it enters the bottom of the housing
31. e The self lines are then returned back to the 206 headphones The teacher can monitor an output from any one of the four Group Pre amps by actuating one of the group switch bank tabs This then coupled to the 207 headphone driver amplifier The output of this 207 headphone driver amplifier is then coupled to the 207 headphone output jacks The Group Call Switch decreases the 206 output drive level and increases the 207 output drive level These modified levels of drive are then applied to the circuitry for the particular mode of operation self or ensemble The Group Call override allows the 207 Teachers Console output to dominate the closed circuit communications An output from the 206 ceramic mic is applied directly to the 206 power amplifier mic input terminals In the 207 a dynamic mic output is applied to a mic pre amp circuit which is applied directly to the 207 power amplifier mic input terminals NOTE This operations description also applies to the Models 207V and 205V teacher s console 23 24 lt 21112020 34 saayweds 8 Z LOZ 291505 1eu10gsugi 1081024 137039 5 7 09712024 02 Sqouy 605061 902 uo owes 3004 Atddns 88804 86512020 414445
32. e all three transistors and check D 4 and R 10 Re place if defective Note After removing all three transistors from the P C board and heat sink follow pro cedure found on Pages 27 and 28 Correction Cause 4 Weak input transistor TR 1 411 0778 green or yellow dot only 202051 Correction 41 Replace TR 1 Complaint Excessive Hiss in Amplifier Cause 1 Voltage regulator oscillating Correction 1 1 Place a 01 MFD capacitor from the collector of TR 5 to ground Cause Correction Cause Correction Correction Complaint Cause Correction Cause Correction Cause Correction Cause Correction Cause Correction 2 Transistor TR 2 and TR 3 noisy 2 1 Change capacitor 18 which is 1 Transistor TR 1 noisy 3 1 Place a 470 PF capacitor from the base to the collector of TR 1 R F Interference Radio T V Etc 1 2 3 4 Place a 750 PFD capacitor from the base of TR 1 to ground Place a 750 PFD capacitor from the base of TR 2 to ground Place a 750 PFD capacitor from the base of TR 3 to ground Make sure all grounds and shielded cables are properly connected Excessive Hum or Buzz E Reed bar input cable not fully in seted into socket on P C board 1 1 Insert plug fully A C power wires too close to ampli fier input 2 1 Redress A C cabling for mini mum A C hum Filter capacito
33. er rod sustain spring that secures the main rail support bracket to the main rail 9 Remove the three screws one in front and two in back that fasten the end action brackets to the mounting blocks If there are cable clamps fastened to the front of the reed bars remove them 10 The action is still being held down in the center Take a long 10 blade 3 16 diameter Phillips head screw driver and remove the screw that secures the bottom right side of the center action bracketto the whip stop and keybed see photo page 16 The screw driver must be inserted at the back left or bass corner of the treble reed bar just in front of the treble damper rail 11 At this point the whole action reed bar assembly should be free to be lifted out of the piano Also you can see the tip of the screw driver going into the screw head by looking at the space located between the middle support bracket and the 33 whippen REMOVE THE WHIP ASSEMBLY Turn the action upside down so it rests on the damper levers Remove the screw at each end of the whip stop and turn it approximately 90 Slide the damper regulating screw and grommet out of the clip in the damper lever Remove the whip flange screw and the entire whip assembly will come out IMPORTANT When installing the new whip be sure the tip of the jack or fly is placed properly in the butt before screwing the whip stop back in place Installing Action Assembly Place action assembly ba
34. es For Group Piano Instruction the Model 206 is the student console and the Models 205V 207 and 207V are teacher s consoles The Models 214 214V and 215V are classroom consoles The Models 207V and 214V have the switches wiring and plugs installed for use with the Model 208 Key Note Visualizer The Models 205V and 215V are similarly equipped to operate the V 500 key Note Visualizer The Model 270 is a Butterfly grand using similar internal assemblies as the model 200 64 Notes A 13 thru C 76 From Floor to Top of Keys 28 5 8 From Floor to Top of Keys Model 270 27 1 4 Not including Music Panel or Casters 32 Not including Music Panel Model 270 34 40 Model 270 41 18 9 16 Model 270 ay 2 Model 270 Approx 150 165 http www oldschool sound com Page 4 Troubleshooting the Wurlitzer 200 Series Amplifiers With Legs and Lyre Model 270 160 168 Wood Bench with removable chrome plated steel legs two of which have leveling glides Sugar Pine keyboard naturals are covered with white implex plastic sharp tops are black molded plastic Wurlitzer manufactured action employing conventional action parts such as whips butts flys jacks dampers etc Regulates Like a Conventional Piano Action Three ply maple covered with mothproofed felt Hammers strike steel tone producing elements causing them to vibrate in a polorized electrostatic field 00 Two 4 x8 Oval 16 ohm Two 4 x 8 oval plus two 8 round
35. f the sharp cap is even with the wood surface of the natural key SEE FIG E 8 SPACE KEYS Keys are spaced with a forked key spacing toc by bending the front rail pin toward the bass or treble as necessary SEE FIG The natural keys are adjusted so the spaces between the keys are uniform The sharp keys are then spaced so they are centered between the adjacent natural keys DAMPER LEVER SPRING 51434 32945 13431 3B8vnos 3 SNid Wve divHS VISIVO SNIRSNnd VH INOHJ lt ie Nna dez poet H3dWVG B3dWVva 10938 H3dWVO 35 13 the keys are spaced brush forward the keys with the palm of the hand so the keys fall in their natural position SEE FIG G A Word of Caution After the keys are spaced check the backs of the keys to make certain adjacent keys are not touching each other It may be neeessary to sand some keys slightly to insure the proper clearance between them 9 STRIKING POINT The striking point is properly set at the factory and should require little or no adjustment in the field If itis necessary to put in anew hammer or to reset a Strike point heating the glue line with a soldering iron will soften the glue to the point where it can be either moved for a new strike point or ta
36. groove located under the damper lever spring to eliminate any squeak SEE FIG D C Check the action completely for any broken parts loose flanges moth eaten or loose felts etc and repair or replace as necessary D With asand paper file reface the hammers if necessary Also the hammer felt may be softened to remove a clicking sound by ap plying a solution of 75 methol alcohol methanol and 25 water Apply the solution to the crown of the hammers using a plastic squeeze bottle with nozzle until the solution soaks into the felt Allow forty five minutes drying time This will puff up the felt fibers of the hammers and will help restore hammer crown SEE FIG D Reed bars must be re moved to perform the above service 6 SET KEY HEIGHT The proper key height is 2 measured from the keybed to the underside of the projecting lip on the front of the natural keys The key height is ad justed by adding or removing hard paper shims between the balance rail of the key frame and the keybed SEE FIG D 7 SQUARE AND LEVEL After the keys have been set to the proper height the keys are then squared to a straightedge by lightly tapping the tops of the balance rail pins toward the bass or treble as required This may be done by using a screw driver or a small hammer The natural keys are leveled to the proper height above the keybed The sharp keys are then leveled to the natural keys so the wood surface just in back o
37. h side of the reed to be sure it is centered in the pickup Unequal spacing makes a reed too close to one side of the pickup and will give an undesirable loud tone SCREW DRIVER For notes that have a short ring time Remove the reed SEE FIG P to check a note with a short ring time The base of the reed or the part under the reed screw should be inspected on both sides of the reed for any foreign material The reed can be cleaned by holding a very fine grit emory paper on a flat surface and polishing both sides of the head until metal shows through This is also an electrical ground If you lose the ground you will lose the volume Any foreign material on the head of the reed will dampen the oscillation If this does not cure the ring time the reed should be replaced REED LEAD WEIGHT HEAD FIG P Voicing can be accomplished in part by chang ing the relative position of the pickup to the reed SEE FIG O Moving the pickup up or down ad jacent to the reed will change tone characteristics of each note Be careful not to bend the pickups up or down excessively or frequently since this will weaken it FIG O SIDE VIEW PICKUR Changing the strike point of the hammer to get a better sound should only be attempted after the preceding steps have been undertaken It is possible to improve the tone and sustain of a reed by being certain that the strike point is correct First loosen the reed bar screws
38. he 200 series has a transistor amplifier and the 200 A has an updated transistor amplifier To my ears I cannot tell the difference in tone between the 200 and the 200 A I m told the reason the amps were updated was because the price of NPN type transistors were less than the PNP types that were originally used in the original 200 The 200 B actually has an IC based pre amp designed to be used for external sound systems leaving out the internal amplifier that drives the speakers Question Iam looking for someone who really knows how to work on this particular model Over the years I ve had more than a few people work on it and it never has sounded right Any info that you could share with me would be extremely helpful Good keyboard techs are the hardest thing to find in the world What I would recommend doing is buying the service manual for your particular model then seek out a qualified piano tech in your area The actions inside the Wurlitzer Electric Pianos are VERY much like the actions in an acoustic piano therefore a piano tech should have no trouble setting up the action As for the electronics the amplifiers are pretty straight forward so a good electronics tech should be able to troubleshoot them with the proper schematics Most music stores have a guy that can do all these things and i m going to put together a list of techs that work on these pianos as well I would recommend looking HERE for places and numbers Question I need
39. heck wall outlet for 120 V A C 12 Check the line fuse in the piano 1 3 Defective line cord and or connectors Cause 2 Defective transistor Correction 2 1 Check all transistor voltages collector base emitter Cause 3 Shorted filter or open diodes in power supply 3 1 Check for low voltage and high voltage and replace shorted filter Correction 32 3 2 Check diode for resistive front to back ratio Cause 4 Cracked printed circuit Correction 431 Solder cracks in printed circuit Cause 5 Defective transformer Correction 5 1 Replace transformer Cause 6 Reed shorted against pickup Correction 6 1 With volume turned down strike all keys several times with palm of hand This will shake loose any foreign matter between the reed and the pick up Check to be sure reeds are centered in pick up slots Cause 7 Input Transistor shorted or open Correction 7 1 Replace TR 1 Complaint Distorted Tone Symptom Raspy or harsh tone Cause 1 Blown fuse on printed cirucit board Correction 1 1 Replace only the blown fuse on the circuit board with a short piece of wire Fuse has been eliminated on later models 2 Voltage regulation bad higher or lower than 15 5 volts 1096 Correction 2 1 Replace TR 5 and or TR 6 voltage regulator transistors Cause Cause 3 Final transistors 511 0772 11 0773 202056 202057 and driver transistor 411 0770 202055 defective 3 1 Replac
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41. k to peak If there is no D C voltage at the external amplifier input a cleaner drive signal can be obtained by removing the 5 capacitor between pins 5 and 6 and replacing it with a jumper wire http www oldschool sound com Page 2 Troubleshooting the Wurlitzer 200 Series Amplifiers Model 203 203W 214 Subject Baffle Board Wiring If you should encounter a piano which has apparent low volume check speaker wiring to ensure they are all in phase The orange wires should be connected to the speaker terminal with the color dot The black wires to the unmarked speaker terminals http www oldschool sound com Page 3 Troubleshooting the Wurlitzer 200 Series Amplifiers The 200 series seems to be the most popular model amongst collectors and players alike It s the latest of the reed based pianos the lightest in weight and probably has the best action and sound amplification of all the models I won t dwell on this aspect much since it s merely opinion According to the schematic dates of the 200 series they were being made in 1981 200 B and beyond Below is an excerpt transcribed from the original manual 200A 64 8 76 From Floor to Keys With Legs 28 5 8 sti esley iT From Floor to Top of Case Not 33 including Music Panel 18 9 16 Less Legs and Pedal 56 15 Removable chrome plated steel legs two of which have leveling glides The Models 203 and 203W are home consol
42. ken out to replace the hammer SEE FIG H LOST MOTION TRAVELING DEPTH ADJUST LOST MOTION 1 32 FIG P LOST MOTION GAP STRIKE POINT HAMMER BLOW DISTANCE The hammer blow distance is factory set and normally will not require adjustment providing the hammers are down on the hammer regulating rail The correct blow distance is 1 5 64 measured from the tip of the hammer to the under surface of the reed SEE PAGE 10 FIG 2 ADJUST LOST MOTION A SMALL AMOUNT OF LOST MOTION should be put into the key and action of the electronic piano to make sure the jack will always return under the hammer butt on a slow return of the key The lost motion is a 1 32 gap between the tip of the fly and the hammer butt covering To adjust the lost motion turn the capstan screw with a capstan wrench SEE FIG 1 Counter clockwise adds lost motion Clockwise to de crease lost motion As you depress the key watch the front of the whip and front of hammer butt to see movement of whip before hammer butt moves SEE FIG 12 ADJUST LET OFF LET OFF refers to the distance between the top of the hammer and the bottom of the reed at the point where the fly will escape the hammer butt The present specifications for the let off distance 1 8 plus or minus 1 32 Setting the let off is perhaps the most catical operation in regulating the Electronic Piano Action Insuring that the let off is consisten
43. l nearly vertical and unhook the three hinges at the back side of the top If the service needed is to correct a problem with fig 6 the amplifier the printed circuit board can now be removed and turned over for checking without unsoldering the leads at each end Finally place the assembly with the piano legs and pedal over the keyboard of the fig 7 The board will rest on the piano arm not on the keys Close the case the service required is regarding the keys or action the entire chassis assembly should be removed as follows NOTE If any of the four models have a screw that fastens the heat sink on the printed circuit board to the reed bar remove the screw and discard it MODEL 200 AND 200A PORTABLE 5 gt SEE FIG 1 amp 2 4 1 Unplug the input cable at the bass end of the printed circuit board SEE FIG 2 4 2 Loosen the six screws that hold the shield to the reed bars and remove the shield by lifting straight up 3 Unplug the white plastic plug behind the speaker plug located on the left side of the chassis assembly SEE FIG 2 Page 4 4 Remove the two screws at each end of the 7 chassis that secure it to the mounting blocks Note The screw located the left hand side Fig 8 shows ways to install the casters on the end and toward the action bracket is larger than the of the case for upright mobility or on the
44. ld the round mounting plate for the auxiliary headphone socket at the bass end of the keybed and the cable clamp that dresses the wires leading to this socket The chassis assembly can then be removed MODEL 207 TEACHER S CONSOLE Follow steps one three and four as described for the Model 200 Disconnect the thirty six pin plug and socket located near the treble end of the chassis Disconnect all the nine pin plugs and sockets on the chassis assembly The entire chassis assembly can now be removed The five or six screws on the shield over the reed bars can now be loosened and the shield removed REGULATING PROCEDURE In the keys and action of the Wurlitzer electronic piano there are approximately 3 200 parts made mostly of wood metal and felt These materials are specially selected and manufactured for use in piano keys and actions but the normal wear from playing the piano packing of the felts and changing atmospheric conditions will probably necessitate some periodic re regulation of the instrument The following pages outline the procedu e for complete regulation of the Wurlitzer electronic piano Before proceeding with a complete regulation however the instrument should be analyzed to determine the extent of regulation required 1 KEYBOARD INSPECTION SEE FIG 2 Page 8 First check the felt punchings on both the balance and front pin lines and the felt on the key bed at the back of the keys Replace these felts if
45. mpedance lines for self Self permits communication between student and teacher for private practice Twenty four possible self line connections are available at the 207 console One or more of these self connections can be selected for use by combinations of the group switch bank and the piano switch bank Each 206 has its own power amplifier output and headphone coupled to its own self line The 207 power amplifier output and headphone are switched through the group switch bank and the piano switch bank to a self line The 206 power amplifier drives the 207 headphone and the 207 power amplifier drives the 206 headphone Refer to schematics 11 0783A and 11 1137 202821 and 202822 A separate ensemble line from each group is connected to the Teacher s Console The collected 206 ensemble signals on the ensemble line and output signal from the Teacher s Console amplifier drive a corresponding group ensemble pre amp TR 32 TR 33 TR 34 and TR 35 By use of one of the lighted ensemble selector tabs the output from any of the four group ensemble pre amps can be switched off switched to a corresponding ensemble driver amplifier TR 4 TR 11 TR 18 and TR 25 or switched to a mixed position combining the outputs of more than one group ensemble pre amps The output from the ensemble driver amplifier drives six transistors with a common input The output from each one of the six transistors is coupled back to an individual self lin
46. n to replace a whip assembly Butt Assembly SEE FIG 2 PAGE 8 Disconnect the damper regulating screw from the related damper lever and one on each side of it by pulling the grommets out of the wire clips Remove the butt flange screw with a slim screw driver between the backs of the damper levers or remove the related damper lever for better accessibility rotate the back side of the butt between the main rail and the damper rail and pull out Damper Assembly SEE FIG 2 PAGE 8 Disconnect the damper regulating screw from the damper lever by pulling the grommet out of the wire clip Remove the damper flange screw and lift the damper lever up and out of the action Action Removal 1 Unplug the 2 or 3 wire A C plug located at the bass end 2 Remove the metal shield over the reed bars 3 Remove the four screws that secure the extreme bass and treble ends of the entire metal amplifier chassis assembly to the mounting blocks 4 Remove ground screws on chassis 5 Unplug the input cable from the printed cir cuit board on 200 only For 200A use a 1 4 nut driver and two screws that hold the Pre Amp assembly board located between the reed bars 6 Lift the chassis and pull it forward approxi mately one inch and remove 7 Remove the shoulder bolt that connects the damper connecting rod to the damper rail lift arm noting the location of the felt washer and the spring washer 8 Remove the two screws behind the damp
47. ost motion and let off operations have been completed The blow distance on all electronic pianos is pre set at the factory and is not adjustable SEE FIG K The back check see insert is also a fixed dimension but can be set to the proper position by adjusting the key dip If the key dip is shallow the fly or jack which also acts as a catcher will not make contact with the back check and the hammer will bobble This can be adjusted by shimming up the balance rail SEE FIG K EM EM 1 Gi m KEY DIP is the total travel measured at the front of the key If the key dip is too deep the catcher will make contact with the back check too soon and the hammer will either block or check off too close to the reed The hammer should check off between 3 8 and 1 2 from the reed If a few individual naturals or sharps are checking off too close to the reed a paper punching can be added under the felts at the front rail to obtain proper back checking DAMPER SUSTAIN ADJUSTMENT The 7 16 nut on the bottom of the damper con necting rod shown in FIG L isa step to limit the upward movement of the damper connecting rod This nut should be adjusted so that a space no more than 1 32 exists between the bottom of the damper levers and the felt on the damper rail SEE FIG L This will insure proper damping of the reeds The following conditions are charac
48. ou are now free to work on the AMPLIFIER P C BOARD amp MOUNTING PLATE ASSEMBLY See Fig 11 page 20 Note For electronic servicing refer back to the Model 200A series To remove the PRE AMP P C BOARD loosen and remove the two hex head screws with 1 4 nut driver See Fig 12 To remove the ACTION follow the same pro cedures as described under Action Removal Page 14 Be sure to remove the center action bracket screw See Fig 13 10 To remove the AMPLIFIER BOARD amp MOUNTING PLATE ASSEMBLY disconnect the two molex connectors on the left and right ends of the amplifier chassis See Fig 14 page 20 Then remove the left and right screws located on the underside of the mounting plate assembly See Fig 15 page 20 Lower and remove the assembly NOTE If amplifier servicing only remove two flat head screws located on the under side rear of piano See Fig 14 NOTE See regular texts for action regulation or electronic servicing 1 FIG 2 3 FIG 4 FG 5 VL BY CIEN FIG 6 19 BM 002 N S 14415 658102 La 111 9260 N S OL 592202 id 575902 14 A I8WSSSV N S Luvis INIT 2 N S LawLs 6ZBTOZ ON ld 926011 N S OL 085902 Ld 99220
49. r in both low voltage and polarizing voltage power sup plies broken loose from printed circuit board through vibration 3 1 Resolder joints and or cracked printed circuit Neon pilot light wires dressed too close to input of amplifier or volume control wires 4 1 Redress all cables or wires away from pilot light assembly Light dimmer control in a room can cause noise in A C power lines 5 1 Turn lights to full brightness Put a 01 MFD bypass capaci tor rated at 3000 volts between the ground post of the A C line and either one of the two hot leads One side will in crease the hum the other will remove it Complaint Excessive Hum That Normal Grounding Does Not Eliminate Cause 1 Some water pipe and electrical grounds are located so far from the actual grounding point they end up Correction being above ground electrically and lose their effectiveness 11 Find a suitable ground as near the installation as possible and connect the lab ground system to it Complaint Vibrato All the Time When Piano 18 Turned Symptom Cause Correction Cause Correction Complaint Cause Correction Complaint Cause Correction Complaint Correction 1 Vibrato on a Model 206 or 207 no vibrato normally on these two models On all models if vibrato c amp nnot be turned off Shorting wire from pin 1 and 12 on printed circuit board imprope
50. rly soldered or missing 206 and 207 only 11 Properly solder or add jumper wire from pin 1 to pin 12 on the printed circuit board Voltage regulator oscillating and going out of regulation in time with the vibyato oscillator 2 1 Adda 01 MFD capacitor from the collector of TR 5 to ground Keys Clicking 1 Back of the sharp caps hitting the aluminum strip behind them 1 1 Remove the top and unscrew the two hex headed bolts that receive the music panel screws one or two turns Be sure to tighten lock nuts after ad justing Cross Talk in Lab 1 This can be caused by improper or no audio ground anywhere in the system 1 1 Correct faulty audio ground A Squeak When the Sustain Pedal is Used Place a small amount of thin grease or Lubriplate at the point where the bottom of the damper connecting rod passes through the felt washer and rubber grommet Correction Complaint Correction Complaint Correction Complaint Correction A Click or Noticeable Snap When the Sustain Pedal is Depressed Squeeze the equivalent of four or five drops of an adhesive sealer such as Dow Corning s Clear Seal or a white bathtub calking compound into the hole on top of the sustain pedal where the cable enters Allow three 3 hours to dry before using This material never hardens but gets rubbery and acts asa cushion or gasket for the steel ball on the end of
51. so keys are not over eased Over eased balance pin bushings will cause the keys to tip and over eased front pin bushings will cause excessive side play and in extreme cases adjacent keys touching at the fronts Over eased keys will become noisy and will not stay properly spaced Sometimes sticking keys may be due to the hole at the bottom of the key at balance point swell ing and tightening around the balance pin The clearance should not be excessive but the key should drop freely over the pin If the balance rail hole is tight it can be enlarged by inserting the smooth shank not the cutting edge of a 21 drill 159 dia into the hole This will give you the ideal size hole with less danger of making the hole too large 2 4x8 SPEAKERS 202243 FUSE SHIELD ASSEMBLY 77055 12 2018 38 CAPACITOR 501181 BOARD COMPLETE 201808 POWER TRANSFORMER 201807 O REMOVE TOP REMOVE MUSIC PANEL SCREWS REMOVE BOTH CONTROL KNOBS REMOVE THREE SCREWS FROM UNDER DOTTED LINES THEN HINGE BACK APPLIES TO BOTH 200 amp 200A MODEL 200 VOLUME CONTROL TOP 201846 002 203643 001 LESS SPEAKERS PILOT LIGHT 201805 SPEAKER 204877 201819 202150 7 TH 5 RRP RAR ARAARAR RA nee RR an 4 4 4 3 be PRE VIBRATO CONTROL 203730 003 C BOARD TRANSFORMER 69 INCLUDES PRE AMP 203697 2037 30 203715
52. t throughout an entire keyboard helps to avoid problems like loud and soft notes uneven scale and an uneven touch from note to note Generally adjusting let off requires one tool a capstan screw wrench which can be obtained from any reputable tuners supply house To sight and measure the let off distance de press a piano key slowly and firmly SEE FIG J From the point where the hammer peaks out before falling to the bottom of the reeds measures the Let Off To adjust let off turn the regulating let off screw with the capstan wrench Raise the screw counter clock wise turns to decrease the amount of let off thus allowing the hammer to get closer to the reed Lower the screw clock wise turns to increase the amount of let off SEE FIG J LET OFF DISTANCE OR 132 77 228 REGULATING SCREW SHIM FRONT RAIL 10 ee ee KEY 3 8 SPECIAL NOTE Electronic pianos that receive hard use and or abuse are often subject to a greater degree of reed breakage very often by professional and or rock band musicians It is possible to decrease the number of breaking reeds by increasing the Let Off distance from 1 8 to 1 4 If this is done be sure to inform the customer that the instru ment will play softer than before and that it would be necessary for them to slightly increase their amplification SEE FIG J KEY DIP AND BACK CHECKING Before doing this operation be sure l
53. ted Group ensemble amplifiers and or headphone amplifiers located on the communication center circuit board 207 a Red tab down Group Call b Very little or no communication from 206 to 207 c Communication from 207 to 206 2B A malfunction found in this check indicates the problem lies in the vicinity of the group call switch Check TR 4 thru TR 10 5 Third Check Ensemble Mix A 207 a Black tab A down b Lighted tab group A down green c Lighted tab group B down green 206 Ensemble Self speaker sw a Group A piano in ensemble position Group piano in ensemble position Play on piano group d Listen to piano group B e Piano A should be heard in B s headphones NOTE 3 If piano A cannot be heard in B s head phone the lighted ensemble select switch A or B has misaligned contact or a jumper wire connecting the two switches has a bad connection This is assuming that the piano in group B has no malfunctions 6 Change cable from 207 receptacle A to re ceptacle C 7 Repeat Steps 2 thru 5 Use corresponding Groups B C 8 Change cable from 207 receptacle B to re ceptacle D Repeat Steps 2 thru 5 Use cor responding Groups C D NOTE Refer to comments on third check paragraph 5 Repeat Steps 2 thru 4 Use corresponding Group D 9 Check Audio Aid 207 SEE FIG 9 PAGE 31 A Black tab D up B Black tab A do
54. teristic of an improperly adjusted damper connecting rod nut SEE FIG L A Nut Too Low If the nut is set too low a greater space re mains between the damper rail and damper lever and as the sustaining pedal is de pressed to rotate the damper rail all of the dampers may not lift off the reeds This results in a dull tone of extremely short duration B Nut Too High When the nut is adjusted too high there will be sufficient space between the damper rail and the damper levers and some of the dampers may be held off the reeds This results in failure to dampen some reeds The adjustment of the damper connecting rod nut must be performed before proceed ing with the regulation of the individual dampers KEY KEYBED Er 2 RASS 2 FIG L 15 ve DAMPER LEVELING When the damper connecting rod nut has been properly adjusted the dampers themselves should be inspected for uniform lift Depress the full sustaining pedal and observe the lift of the dampers If some of the dampers are slow that is they lift off the reeds somewhat later than the majority of the dampers they must be adjusted by gluing a thin paper shim on the bottom surface of the damper lever where it con tacts the felt on the top of the damper rail SEE FIG L The shim compensates for uneven wear or pack ing of the damper rail felt and provides a uniform damper lift DAMPER REGULATION The
55. they are moth eaten or packed excessively Next inspect the entire keyboard for free move ment of each key at both the balance and front pin lines Check both natural and sharp keys by lift ing them about 1 4 and dropping If the keys do not drop back they are tight in either the balance rail bushing or the balance rail hole Check the balance rail bushing first by moving the key from side to side There should bea slight movement of the key at that point Check the balance rail hole by moving the key forward and backward There should be a slight chug movement Check the front rail bushing by pushing the key all the way down and moving it from side to side There should be a slight movement EASE KEYS When a piano keyboard is found to be sticking or sluggish the cause is often due to the felt swelling either at the balance key bushing or at the front key bushing or both Even if just one or two keys are sticking it is advisable to check the entire keyboard Key easing is done by using a pair of key easing pliers which can be obtained from any reputable tuners supply house SEE FIG A Easing is executed by inserting one lip of the pliers into the opening in the key and positioning the other lip of the pliers on the out side of the key and squeezing firmly but care fully Wood and felt are thereby compressed to obtain a proper clearance at the pin FIG A EASING KEYS When easing keys caution should be exercised
56. wn C White tabl 1 down D Audio Aid lever group A to position 1 E Audio Aid tape player radio sig generator etc connected to Audio Aid 1 jack F Audio Aid should be heard in teacher s phones G Black tab A up H Black tab B down Audio Aid lever B to position 81 J Audio Aid lever group A off K Audio Aid should be heard in teacher s phone L Repeat for C and D M Repeat for Audio Aid 2 thru 4 NOTE If an audio aid cannot be heard by the teacher in any of the positions stated above the trouble will lie in either the audio aid jack or between this and the lighted switches MISCELLANEOUS The 36 conductor plug at the treble end of the chassis on the Model 207 should be carefully checked and cleaned inspected for broken or shorted wires and be sure itis well seated and locked in position Make sure all external cable heads are well seated in their receptacles If a lab has all ensembles and audio aids inoperative check the communication center power supply for proper voltages located on bottom of piano Some Model 207 s have 6 3 volts on the indicator lamps while others have 4 8 volts A resistor 2 2 ohm 2 watt was added to drop the voltage from 6 3 to 4 8 V which gives added life to bulb REPLACING PLASTIC POWER TRANSISTORS 1 Remove defective transistor 2 Clean off old compound with solvent from A Screw B Face of heat sink C Transistor
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