Service Manual TRC-2050C. Compact Cassette Recorder FILE NO. Contents (XE) (US) PRODUCT CODE No (XE) (US)

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1 FILE NO. Service Manual Compact Cassette Recorder TRC-C (XE) (US) Contents PRODUCT CODE No. (XE) (US) Tape adjustments... Exploded view... Parts list... Wiring connection... Schematic diagram (AMPLIFIER)... Wiring diagram (SWITCH)... (AMPLIFIER)... REFERENCE No. SM

2 TAPE ADJUSTMENTS a. Adjusting Azimuth Be sure to clean the heads before attempting to make any adjustment. Be sure both channel's waveform are the same for the phase matching. Be sure both channels ( and ) are the same level using a dual-channel oscilloscope. After completion of the adjustment, apply the threadlock (TB-B) to the azimuth adjustment screws to fix them securely. () Load an azimuth adjustment test tape (VTT-7 etc., khz) in tape deck. () Press the PLAY button. () Use a cross-tip screwdriver to turn the screw for azimuth adjustment so that the left and right outputs are maximized. () Press the STOP button. HEAD AZIMUTH ADJUSTMENT PLAY b. Replacing the Head After replacing the head, demagnetize the head by using a degausser. All wiring should be returned to the original position after work is completed. R / P HEAD BLACK WHITE WHITE GRAY c. Adjusting Tape Speed Use a plastic screwdriver for adjustment. () Inset the test tape (TCC-9 etc., Hz). () Press the PLAY button. () Use a flat-tip screwdriver to turn the VR to adjust so that the frequency counter becomes Hz. TAPE SPEED CONTROL TAPE PLAY SPEED SLOW NOR FAST MOTOR SPEED ADJUSTMENT.. SPEED d. Checking the Mechanism Torques Clean the head, capstan and pinch roller before making any measurement. Measurement Take-up torque Back tension Tape tension Cassette for PLAY : TW-A PLAY : TW-A Drive-power cassette measurement F.FWD / REW : TW- TW- PLAY ~ gr.cm.~. gr.cm gr or more F.FWD gr.cm more REW gr.cm more

3 EXPLODED VIEW CABINET & CHASSIS 9 TMCTN-SH Y 9 Y TAPE MECHANISM TMCTN-SH Y 7 TM TM TM Y TM 7 Y TM Y - -

4 PARTS LIST PRODUCT SAFETY NOTICE EACH PRECAUTION IN THIS MANUAL SHOULD BE FOLLOWED DURING SERVICING. COMPONENTS IDENTIFIED WITH THE IEC SYMBOL! IN THE PARTS LIST AND THE SCHEMATIC DIAGRAM DESIGNATED COMPONENTS IN WHICH SAFETY AND PERFORMANCE CAN BE OF SPECIAL SIGNIFICANCE. WHEN REPLACING A COMPONENT IDENTIFIED BY!, USE ONLY THE REPLACEMENT PARTS DESIGNATED, OR PARTS WITH THE SAME RATINGS OF RESISTANCE, WATTAGE OR VOLTAGE THAT ARE DESIGNATED IN THE PARTS LIST IN THIS MANUAL. LEAKAGE-CURRENT OR RESISTANCE MEASUREMENTS MUST BE MADE TO DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE PRODUCT TO THE CUSTOMER. CAUTION : N.S.P : Regular type resistors and capacitors are not listed. To know those values, refer to the schematic diagram. Regular type resistors are less than / W carbon type and ohm chip resistors. Regular type capacitors are less than V and less than µf type of Ceramic type and Electrical type. Not available as service parts. PACKING & ACCESSORIES 9 CARTON CASE,INNER(XE) 9 CARTON CASE,INNER(US) 7 CUSHION 7 CASE,CARRYING 9 INSTRUCTION MANUAL(XE) 7 INSTRUCTION MANUAL(US) ADAPTOR,AC-DC(US Only) CABINET & CHASSIS DEC,MIC ASSY,LID,CASSETTE 9 SPRING,OPEN BUTTON,INDEX 9 KNOB,SLIDE,REC,MODE DEC,WINDOW,LED 7 7 COVER,LID 9 LEVER,REC SPRING,WIRE,REC LEVER ASSY,CABINET(XE) ASSY,CABINET(US) 77 COUNTER 9 SPACER,MECHA,COUNTER 9 STRAP,SET 7 BUTTON,REC 779 BUTTON,PLAY 7 BUTTON,STOP 7 79 BUTTON,REW 9 BUTTON,FWD BELT,SQUARE,COUNTER 9 LEVER,RP 99 TERMINAL,BATTERY(-) TERMINAL,() 9 KNOB,SLIDE,PLAY,SPEED 9 KNOB,SLIDE,VAS 9 LID,BATTERY ASSY,CABINET,BOTTOM 7 9 KNOB,SLIDE, FIXING PARTS Y 9 SCR S-TPG PAN X, LID,CASSETTE/COVER Y 77 SCR S-TPG PAN X,MECHA/CABI Y 77 SCR S-TPG PAN X,PWB/CABI Y SCR S-TPG PAN X,CABI-CABI REAR SWITCH P.W.BOARD ASSY 7 ASSY,PWB,SW(Only Initial) D LED SML-DT IC 9 IC TC7WBFK S 7 SWITCH,SLIDE P-T,/SW S SWITCH,PUSH P-T,CUE-INDEXSW AMPLIFIER P.W.BOARD ASSY 7 ASSY,PWB,AMP(Only Initial) C7 9 TA-SOLID 7U M.V C7 9 TA-SOLID 7U M.V C7 9 TA-SOLID 7U M.V C 9 TA-SOLID 7U M.V C 9 TA-SOLID 7U M.V CN 7 JACK,PHONE D.,EXTMIC or JACK,PHONE CN 7 JACK,PHONE D.,EXTMIC or JACK,PHONE CN 7 JACK,PHONE D.,REMOTE CN 7 7 JACK,PHONE D.,EARPHONE or JACK,PHONE CN SOCKET,DC,DCJACK D 7 9 DIODE DANK D DIODE SS D DIODE SS D7 7 ZENER DIODE UDZSB D 7 ZENER DIODE UDZSB D9 7 ZENER DIODE UDZSB D9 7 DIODE RBM- IC 9 IC LA7M IC 9 IC LA7M IC 9 IC TC7WBFK IC 9 77 IC TC7SBFU IC 9 IC TC7WBFK IC 9 77 IC TC7SBFU IC IC TC7SBFU IC 9 77 IC TC7SBFU IC9 9 IC TC7WBFK Q TR SC-L or 7 TR KTC7-Y or TR KTC7-GR or 9 TR SCK-R Q TR KTC7-GR or 7 TR KTC7-Y or TR SC-L or 9 TR SCK-R Q TR KTC7-GR or 7 TR KTC7-Y or TR SC-L - -

5 PARTS LIST or 9 TR SCK-R Q 9 TR SCK-R or TR SC-L or TR KTC7-GR or 7 TR KTC7-Y Q TR KTC7-GR or 7 TR KTC7-Y or TR SC-L or 9 TR SCK-R Q 7 TR SD-X or TR SD-X7 Q7 7 7 TR XPAAM Q 7 7 TR XPAAM Q9 TR SA-M or TR SA7K-R or 9 TR SA7AK-R or 7 TR KTA-Y or 97 TR KTA-GR Q TR DTCEKA or 9 9 TR KRCS Q TR DTCEKA or 9 9 TR KRCS WIRING CONNECTION Q9 TR SB9- or 9 TR SB9-7 Q9 9 9 TR KRCS or TR DTCEKA S 9 SWITCH,PUSH,R/P SW or SWITCH,PUSH,-,R/P SW S 7 SWITCH,SLIDE P-T,./. SW S SWITCH,SLIDE P-T,PLAYSPEEDSW S 7 7 SWITCH,SLIDE,SW S SWITCH,SLIDE P-T,VASSW VR 7 VR,ROTARY KBX,VOL VR7 9 VR,SEMI,K S,SPEED VR TAPE MECHANISM 9 ASSY,MECHA,TM-CTN-SH TM 7 HEAD,ERASE TM 9 9 HEAD,R/P TM 7 ASSY,PINCH ROLLER TM 9 7 ASSY,MOTOR TM 7 7 MAIN BELT SWITCH P.W.B BATTERY DC V TAPE DECK MECHANIZUM M HEAD A HEAD B BATT RED BLACK - MOTOR HEAD-A HEAD-A - HEAD-B HEAD-B - MIC- MIC - MIC- MIC- BATT - HP CN MIC CN MIC CN PLAY SWITCH CN REMOTE BLACK P.SW P.SW SP - SP AMPLIFIER P.W.B RED CN9 EXT. DC V BLACK RED BLUE WHITE GRAY RED This is a basic wiring connection. SPEAKER MIC MIC - -

6 WIRING DIAGRAM (SWITCH) PARTS SIDE VIEW 9V- F ADBD7B LED CUE V CAN D R C RR R R IC C INDEX S S PATTERN SIDE VIEW 9V- F ADBD7B This is a basic wiring diagram. - -

7 D C 7/ D9 RBM D9 UDZSB D UDZSB C / CN9 SS POWER SW SCHEMATIC DIAGRAM (AMPLIFIER) CN HEAD PHONE S:RECORD/PLAY SW S:TAPE SPEED SW S:PLAY SPEED SW D POWER S CUE-INDEX R K DIC R.K R.K K. R C S - S- (R-CH) (L-CH) SP MIC MIC S: SW S:VAS SW R. C IC TC7WBFK 7 S:REC MODE SW S:CUE-INDEX SW V CUE-INDEX LED CN MIC (L-CH) 7 R7 K V CUE-INDEX LED 7 R7.K R K CE OUT VDD IN IC TC7SBFU R.K 7 IC9 Q9 R9 KRCS TC7WBFK 7K R K CN MIC (R-CH) Q9 SB9 R-CH L-CH. C IC7 TC7SBFU R9.K CE OUT VDD IN C9 / R7.K R - TC7WBFK R K IC - TC7WBFK D7 UDZSB R7 K C7 P C7 D DANK IC. C LA7M. IC LA7M R7 C7 SLOW C.7 R C.7/.. NOR. C7 EQ C. PRE-NF EQ.dB PRE-. PRE-NF.dB C7 FAST VR R77 C7 9P -.. R.K.7;B.K VR- C. K PRE-OUT EQ-IN C7 C7 K.7 PRE-OUT. MIC. 7P. C77 R R7. MIC R7 REC-IN MIC-IN..K.K R REC-IN K REC K REC. C7 7;.-T. (B) R R. R7 REC-OUT K K VREF-OUT K R 7K REC-OUT K K 7K C7 ;.7 C7 7;.-T (B) C ALC-CONT MIC-VCC 7/ ALC-CONT C7 IC - TC7WBFK C C P IC TC7SBFU R K - TC7WBFK 7;.-T (B) K K (R-CH) 7 (B) R 7;.-T IN VDD OUT CE (L-CH) 7 C7. R7 C7. R.K R R K. R9.K R 7K R9.K S 7K R7 C. C 9P C 7P R.7K C7. Q CK R79.K C R K C7 7P C 7P R7 C77 R79..K - S 9 R7.7K. Q CK S - 7/ C ; C R CK 7 Q Q ; C C R7 S R77.7K R K VAS C7 ;. R VOX-CONT ALC C79. AF-OUT C7.K R7 R9 C9.. /. R K VOX. VOX LED-DRIVE VOX-DELAY K..7 S R R7 CUE TONE ON/OFF OFF ON MIC R/P-SW 7K M CUE TONE OSC VCC. R M.7 R7 R C7 K.7. R7 K R.K. R/P-MUTE C R CUE TONE OUT R.7. K..K VR7 K POWER-IN GVN-CONT. R R7 C7. K.. GVN-VREF R77 R POWER-OUT R C 9... R.F R/P R7 C7 POWER VS. R C.. R7 7 GVN- POWER-OUT GVN. VCC GVN-OUT.7 C. CK /..7K 7 Q D Q CK 9 R K C7.7 C.7 R K 7;.-T C. C R K R7 K R7 K. C7 P C 9 C7 P R K R K 7 SS PRE- K 9 7 K REC. EQ-IN.. MIC-IN PLAY PLAY. VREF-OUT K REC PLAY S-.7 MIC-VCC. AF-OUT VAS ALC VOX-CONT PLAY REC S- S- REC.. LED-DRIVE VOX VOX VOX-DELAY..7 R/P-SW CUE TONE ON/OFF MIC VCC CUE TONE OSC..7 VREF VREF CUE-TONE. R/P-MUTE CUE-TONE. CUE TONE OUT. GVN-CONT. POWER-IN. GVN-VREF S-. POWER-OUT. VS R/P R.F POWER. GVN- GVN POWER-OUT. VCC D Q XPAAMR IC TC7SBFU R7 9 Q7 XPAAMR GVN-OUT.7.7K.7K C. IN VDD OUT CE C. C7. R R CN REMOTE R R.7K 9 R 7K R Q Q Q9 7K KRCS KRCS KTA This is a basic schematic diagram

8 WIRING DIAGRAM (AMPLIFIER) PARTS SIDE VIEW PATTERN SIDE VIEW R R S ON VAS OFF Q9 Q Q OFF VAS SW ON 9V- F ADBD7A OFF ON VR CN CN C CN MIC R MIC H.P S R CAN Q D D MIC- MIC- R77 C C CAN R R7 R R CAN7 C Q7 SW R7 R R7 Q9 R7 CAN9 ADBD7A 9V- F MIC_ CAN CAN C D IC CAN9 C CAN R IC9 C9 CAN9 CAN9 MIC_ R C R LED CUE C C R IC C IC7 V C S IC HEAD-B R C C CAN R D C7 R D7 HEAD-A Q R R Q R Q R7 R R R R7 CAN7 R9 R Q Q R CAN7 CAN7 Q R R7 IC MOTOR- HEAD-B- HP MIC MIC BATT- HEAD-A- C7 C7 R7 CAN R SP R R IC C7. CAN7 C7 MOTOR S C79. SP- P.SW. TAPE-SPEED. OFF ON CAN7 R9 C C C C R R CAN R R9 CAN CAN7 Q9 C IC CAN R9 CAN C R R C R C C C R R C7 CAN CAN R C R R C C C9 R7 C R R R CAN CAN R9 R C R C R7 R C77 CAN7 VR7 C7 CAN7 CAN7 CAN7 R7 R77 R R7 C7 C7 C7 CAN7 CAN7 R79 C7 CAN7 CAN7 CAN77 C7 C7 R7 R79 R7 CAN7 IC C7 C77 R7 CAN9 CAN9 C7 C7 C7 R7 C7 C7 R7 R7 CAN9 CAN R7 R7 CAN9 CAN9 C7 R7 C7 R7 C7 CAN9 CAN9 CAN97 C7 R7 C7 C7 R77 CAN CN9 C D9 BATT CN CAN CAN P.SW FAST NOR SLOW D9 S FAST NOR SLOW SANYO Electric Co., Ltd. Osaka, Japan Apr. / ' BB Printed in Japan This is a basic wiring diagram

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