Page 1 TA-EX770 TUNER ST-EX770 CD PLAYER CDP-EX770 MINIDISC DECK MDS-EX770 HCD-EX770 is composed of TA-EX770 and CDP-EX770 PARTS LIST (ACCESSORIES & PACKING MATERIALS) Part No. Description 1-475-883-11 COMMANDER, STANDARD (RM-EX77) 1-501-594-11 ANTENNA (FM) 1-501-721-11 ANTENNA (LOOP) 1-769-170-21 CORD (WITH CONNECTOR) (7P) (TA-ST-MDS-CDP) 1-775-373-11 CORD, CONNECTION (0.5m) (AUDIO)
Page 2 • Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. INTEGRATED STEREO AMPLIFIER MICROFILM 98D001648-1D Printed in Japan ©1998.4 Sony Corporation Published by Quality Assurance Dept. Home A&V Products Company 9-922-858-11 (Shibaura)
Page 3 TA-EX66/EX77 SERVICE MANUAL AEP Model UK Model E Model TA-EX66/EX77 is the amplifier section Photo: TA-EX77 (AEP, UK model) in MHC-EX66, DHC-EX77MD/MD77. SPECIFICATIONS General AEP, UK model: DIN power output 45 + 45 watts (6 ohms at 1 kHz, DIN) Power requirements Continuous RMS power output AEP, UK model:...
Page 4: Table Of Contents
LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY.
Page 5: General
SECTION 1 This section is extracted from instruction manual. GENERAL – 3 –...
Page 6 – 4 –...
Page 7 – 5 –...
Page 8 SECTION 2 DISASSEMBLY • This set can be disassembled in the order shown below. CASE, FRONT PANEL ASS’Y BACK PANEL (Page 7) (Page 6) MAIN BOARD CONNECTOR BOARD (Page 8) (Page 7) Note: Follow the disassembly procedure in the numerical order given. CASE, FRONT PANEL ASS’Y 3 case 1 screw (BVTT3 ×...
Page 9 3 three screws BACK PANEL (BVTP3 × 10) EX77 2 connector 4 claw (CN504) 1 connector (CN911) 3 screw (BVTP3 × 8) 3 five screws (BVTP3 × 10) 5 Remove the back panel to direction of the arrow A . 3 Remove the connector (CN554) to direction of the arrow B .
Page 10 MAIN BOARD 2 four screws 3 Remove the MAIN board to (BVTT3 × 6) direction of the arrow. 1 two screws (BVTP3 × 16) – 8 –...
Page 11 SECTION 3 DIAGRAMS 3-1. IC PIN FUNCTION DESCRIPTION • PANEL BOARD IC101 MB89193A-157 (SYSTEM CONTROLLER) Pin No. Pin Name I / O Function Plug in detection signal input of the MIX MIC jack (J201) MIC-IN Insert the microphone plug with the jack when “H” STANBY Power on/off control signal output terminal “H”: power on, “L”: standby mode...
Page 12 • IC Block Diagrams IC104 BA6208 MOTOR SWITCH DRIVE MOTOR SWITCH DRIVE IC105 SN74HC138AN DATA OUTPUTS OUTPUT SELECT ENABLE IC203, 503 MC14052BCP SELECT A INH 7 SELECT B – 10 –...
Page 13 IC701 µPC1237HA OVER LOAD DET MUTE OFFSET DET LATCH/ AUTORESET AC OFF • Waveforms 2 IC101 8 (XOUT) 1 IC101 7 (XIN) 5.7 Vp-p 5.5 Vp-p 4 MHz 4 MHz – 11 –...
Page 14 • Circuit Boards Location PRIMARY board CONNECTOR board SECONDARY board SW board (EX77) PANEL board MAIN board VOL board – 12 –...
Page 18 X-4948-359-1 PANEL ASSY, FRONT (EX66) 4-951-620-01 SCREW (2.6X8), +BVTP X-4948-436-1 PANEL ASSY, FRONT (EX77: AEP, UK) 4-977-699-11 LEG (F) 4-985-922-01 RING, ORNAMENTAL * 13 1-665-663-11 VOL BOARD 4-962-708-01 EMBLEM (4-A), SONY 3-363-099-01 SCREW (CASE 3 TP2) 4-985-918-01 INDICATOR (POWER) 4-978-245-11 CASE – 22 –...
Page 19 (2) MAIN SECTION not supplied T901 AEP, HK, SP AEP, SP UK, HK supplied not supplied EX77 The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Ref. No. Part No.
Page 20 SECTION 5 CONNECTOR MAIN ELECTRICAL PARTS LIST Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark NOTE: The components identified by mark • Due to standardization, replacements in the • Items marked “*” are not stocked since they ! or dotted line with mark ! are parts list may be different from the parts speci- are seldom required for routine service.
Page 21 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C551 1-162-286-31 CERAMIC 220PF CN501 1-770-966-11 PIN, CONNECTOR (PCB) (V TYPE) 6P (AEP, UK) CN502 1-569-490-11 SOCKET, CONNECTOR 3P C552 1-162-286-31 CERAMIC 220PF CN801 1-764-289-11 PIN, CONNECTOR (PC BOARD) 22P (AEP, UK) C553 1-162-286-31 CERAMIC...
Page 22 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R532 1-249-429-11 CARBON 1/4W R306 1-260-103-11 CARBON 2.2K 1/2W R533 1-249-429-11 CARBON 1/4W ! R309 1-212-881-11 FUSIBLE 1/4W F R534 1-247-807-31 CARBON 1/4W ! R310 1-217-151-00 RES, METAL PLATE 0.22 R535 1-247-807-31 CARBON...
Page 23 MAIN PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < SPEAKER TERMINAL > C263 1-126-163-11 ELECT 4.7uF C264 1-162-294-31 CERAMIC 0.001uF TB401 1-537-240-11 TERMINAL BOARD (CHECKER PIN) (SPEAKER) (AEP, UK) C265 1-162-282-31 CERAMIC 100PF ************************************************************ (AEP, UK) A-4398-059-A PANEL BOARD, COMPLETE (AEP, UK) C291...
Page 24 PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark Q109 8-729-422-73 TRANSISTOR UN4212 R213 1-247-903-00 CARBON 1/4W Q110 8-729-422-73 TRANSISTOR UN4212 R214 1-247-903-00 CARBON 1/4W Q111 8-729-900-63 TRANSISTOR DTA124ES R215 1-247-843-11 CARBON 3.3K 1/4W Q112 8-729-422-73 TRANSISTOR UN4212 Q113 8-729-422-73 TRANSISTOR UN4212 R216...
Page 25 PANEL PRIMARY SECONDARY Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark RV202 1-223-973-11 RES, VAR, CARBON 10K/10K (BASS) < SWITCH > RV221 1-223-974-11 RES, VAR, CARBON 50K (MIC LEVEL) S901 1-762-884-11 SWITCH, SLIDE < SWITCH > (MODE SELECTOR DIGITAL REC/ANALOG REC) ************************************************************ S101...
Page 26 TA-EX66/EX77 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark Sony Corporation 97D0573-1 Home A&V Products Company Printed in Japan © 1997. 4 9-960-931-11 Published by General Engineering Dept. (Shibaura) – 30 –...
Page 27 • Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. FM STEREO/FM-AM TIMER TUNER MICROFILM 98D001648-1D Printed in Japan ©1998.4 Sony Corporation Published by Quality Assurance Dept. Home A&V Products Company 9-922-857-11 (Shibaura)
Page 28 ST-EX77 SERVICE MANUAL AEP Model UK Model E Model This set is the tuner section in MHC-EX66,DHC-EX77MD/MD77. SPECIFICATIONS AEP, UK models: Hong Kong, Singapore models: FM STEREO/FM-AM TIMER TUNER MICROFILM...
Page 29 COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
Page 30 Hong Kong, Singapore models For Hong Kong, Singapore models: AEP, UK models For AEP, UK models: AEP, UK models: Hong Kong, Singapore models: AEP, UK models: Hong Kong, Singapore models:...
Page 31 AEP, UK models: Hong Kong, Singapore models: For AEP, UK models: For Hong Kong, Singapore models:...
Page 32 (AEP, UK models only)
Page 34: Disassembly
SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. 2 case 1 two screws (case 3 TP2) 3 flat wire (19 core) (CN102) 5 two screws (BVTP3 × 8) 1 two screws 8 main board (case 3 TP2) 4 three screws (BVTP3 ×...
Page 35: Electrical Adjustments
SECTION 3 ELECTRICAL ADJUSTMENTS Precautions in Repairing If the front unit fails, it is difficult to repair the inner circuits, so replace the entire front end unit. The FM TUNED level must be adjusted after the AM TUNED level adjustment has completed. AM SECTION AM Tuning Level Adjustment Setting :...
Page 36: Diagrams
SECTION 4 DIAGRAMS 4-1. IC PIN FUNCTION DESCRIPTION MAIN BOARD IC201 µPD78013FGC-544-AB8 (SYSTEM CONTROL) Pin No. Pin Name Function DESTINATION DESTINATION Destination selection input. DESTINATION DESTINATION IF +50 Not used. (Ground) IF –50 BACK UP Back up mode input. – Not used.
Page 37 Pin No. Pin Name Function System main clock. (10 MHz) – Ground System sub clock. (32.768 kHz) – Ground KEY IN K1 KEY IN K2 Key input. (analog) KEY IN – – – Ground – – – Analog power supply +5V. Analog system reference voltage input.
Page 38 • Waveforms 1 IC51 1 3 IC201 $∞ 1.8 Vp-p 2.4 Vp-p 32.768 kHz 4.5 MHz 4 IC302 !£ 2 IC201 $™ 2.8 Vp-p 3.1Vp-p 4.332 MHz 10 MHz • IC Block Diagrams IC1 LA1835 17 16 DECODER RF. AMP ANTI BIRDIE BUFF STEREO...
Page 39 IC51 LC72130 PHASE DETECTOR CHARGE PUMP UNLOCK POWER DETECTOR RESET REFERENCE SWALLOW COUNTER DIVIDER 1/16, 1/17 4BITS 12BITS PROGRAMMABLE DRIVER UNIVERSAL DATA SHIFT REGISTER LATCH COUNTER 3 4 5 6 IC302 SAA6579 TEST LOGIC AND OUTPUT SELECTOT SWITCH 57KHz OSCILLATOR ANTI- QUALITY BIT RECONSTRUCTION...
Page 40 SECTION 5 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “∗” are not stocked since they may have some difference from the original are seldom required for routine service. Some one. delay should be anticipated when ordering these items.
Page 41 Remark X-4948-355-1 PANEL ASSY, FRONT (AEP, UK) 4-985-892-11 BUTTON (PLAY) (TUNER/BAND, PRESET) X-4948-357-1 PANEL ASSY, FRONT (HK, SP) (HK, SP) 4-962-708-01 EMBLEM (4-A), SONY 4-985-892-21 BUTTON (PLAY) X-4947-762-1 BUTTON (TIMER) ASSY (TUNER/BAND, TUNING MODE) (AEP, UK) 4-985-890-01 BUTTON (MODE) * 58...
Page 42 SECTION 6 MAIN ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark parts list may be different from the parts speci- are seldom required for routine service. ! or dotted line with mark ! are critical for safety.
Page 43 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C142 1-128-576-11 ELECT 100uF 20% 63V C314 1-101-884-00 CERAMIC 56PF C145 1-126-967-11 ELECT 47uF 20% 50V (AEP, UK) C315 1-126-967-11 ELECT 47uF 20% 16V C146 1-164-159-11 CERAMIC 0.1uF (AEP, UK) C161...
Page 44 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < IC > 8-729-422-57 TRANSISTOR UN4111 8-759-176-03 IC LA1835 Q121 8-729-202-67 TRANSISTOR 2SK246-GR3 IC51 8-759-288-54 IC LC72130 Q122 8-729-209-15 TRANSISTOR 2SD2012 IC111 8-759-231-53 IC TA7805S Q123 8-729-900-80 TRANSISTOR DTC114ES IC171 8-759-165-80 IC PST600C-T Q141...
Page 45 MAIN PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-249-425-11 CARBON 4.7K 1/4W < VARIABLE RESISTOR > 1-249-425-11 CARBON 4.7K 1/4W 1-249-425-11 CARBON 4.7K 1/4W 1-238-601-11 RES, ADJ, CARBON 22.0K (AEP, UK) 1-238-600-11 RES, ADJ, CARBON 10.0K 1-249-425-11 CARBON 4.7K 1/4W...
Page 46 1-572-184-11 SWITCH, KEYBOARD (REC) S606 1-572-184-11 SWITCH, KEYBOARD (DAILY) S607 1-572-184-11 SWITCH, KEYBOARD (TIMER SET) S608 1-572-184-11 SWITCH, KEYBOARD (ENTER/NEXT) Sony Corporation 97D0573-1 Printed in Japan © 1997. 4 9-960-933-11 Home A&V Products Company Published by General Engineering Dept. – 28 –...
Page 47 • Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. COMPACT DISC SYSTEM 98D001648-1D MICROFILM Printed in Japan ©1998.4 Sony Corporation Published by Quality Assurance Dept. Home A&V Products Company (Shibaura) 9-922-855-11...
Page 48 CDP-EX77 SERVICE MANUAL AEP Model UK Model E Model CDP-EX77 is the CD player section in MHC-EX66, DHC-EX77MD/MD77 Model Name Using Similar Mechanism HCD-MD5 CD Mechanism Type CDM38A-5BD19 Base Unit Name BU-5BD19 Optical Pick-up Name KSS-213B/K-N SPECIFICATIONS System Compact disc and digital audio system Laser Semiconductor laser (λ...
Page 49: Printed Wiring Boards
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
Page 50: Service Box (Pfj-1)
SECTION 1 SERVICING NOTES 1-1. Power Supply During Servicing This unit is not able to operate on its own because it does not have its own power supply. During servicing, connect to other units. Power is supplied when the SYSTEM POWER button of the amplifier (TA-EX66/EX77) is turned ON. If the other units are not available, use a service box (PFJ-1) and jig (J-2501-078-A).
Page 56: Disassembly
SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. CASE, CHASSIS (Page 9) LOADING PANEL (Page 10) FRONT PANEL SECTION (Page 10) OPTICAL PICK-UP, MAIN BOARD, BASE UNIT BD BOARD SLED MOTOR CD MECHANISM DECK (Page 11) (Page 13) (Page 13)
Page 57 LOADING PANEL 3 loading panel 1 Rotate the BU cam ass’y to direction of the arrow A. 2 Pull the tray (slide). BU cam ass’y FRONT PANEL SECTION 2 two screws (BV3 × 10) 3 two bosses 4 claw 1 flat wire (29 core) 5 front panel (CN305) section...
Page 58 MAIN BOARD, CD MECHANISM DECK !£ CD mechanism deck !¡ screw (BV3 × 10) !™ bracket (L) 3 connector (CN303) !¡ screw (BV3 × 10) !™ bracket (R) 1 Six screws 0 flat wire (8 core) (BV3 ×10) (CN702) 2 back panel 4 connector (CN304) 9 relay...
Page 59 TRAY SECTION claw A claw B 3 flat wire (CN705) flat wire Note: When installing the tray, pull around the flat 4 two claws wire to pass through the claw A and claw B, as shown in the figure. 2 Pull the tray. 5 Removal the tray.
Page 60 BD BOARD 1 two screws 1 two screws (PTPWH M2.6 × 6) (PTPWH M2.6 × 6) 2 optical pick-up section 3 two springs 3 two springs 5 screw 4 flat wire (BVTP 2.6 × 8) (CN101) 6 Removal 7 BD board the four solders.
Page 61 SECTION 4 ELECTRICAL ADJUSTMENTS 5. Confirm that the oscilloscope waveform (S-curve) is symmetri- Notes: cal between A and B. And confirm peak to peak level within 1. CD Block basically constructed to operated without adjust- 2.4 ± 0.7 Vp-p. ment. Therefore, check eaech item in order given.
Page 62 Traverse waveform level: 300 ± 100 mVp-p × 100 = less than ± 7% specified value: • 2 (A+B) • A+B = 300 ± 100 mVp-p 7. After check, remove the lead wire connected in step 1. Focus/Tracking Gain Adjustment (RV102, RV103) This gain has a margin, so even if it is slightly off.
Page 63: Diagrams
SECTION 5 DIAGRAMS • Circuit Boards Location TABLE board SENSOR board BD board PANEL board LOADING board DISPLAY board MAIN board RELAY board – 16 –...
Page 64 • Waveforms – BD Section – – MAIN/PANEL/MOTOR Section – 1 IC101 #¡ (RFO) (PLAY Mode) 6 IC103 @∞ (XPCK) 1 IC501 !¡ (X2) 500 mV/DIV, 500 ns/DIV 1.3 ± 0.3 Vp-p 5.3 Vp-p 3 Vp-p 10 MHz 14 ns 2 IC101 $¢...
Page 65 • IC Block Diagrams – BD Section – IC101 CXA1782BQ – LEVELS 24 SENS – MIRR RF IV AMP1 DFCT 23 C. OUT – 22 XRST RF IV AMP2 21 DATA FE BIAS • IIL DATA RESISTOR • INPUT SHIFT RESISTOR •...
Page 66 IC102 BA6397FP DRIVE DRIVE DRIVE BUFFER BUFFER BUFFER DRIVE BUFFER REGULATOR DRIVER MUTE DRIVE DRIVE DRIVE DRIVE BUFFER BUFFER BUFFER BUFFER IC103 CXD2507AQ SERVO AUTO DATA SEQUENCER XRST SENS SUB CODE MUTE INTERFACE PROCESSOR DIGITAL LOCK SQCK TEST SQSO FILO EXCK DIGITAL FILI...
Page 67 IC104 PCM1710U-B ML/DSD LRCIN INPUT MC/DM2 INTERFACE DIGITAL MODE FILTER CONTROL BCKIN MD/DM1 TIMING CLKO MUTE CONTROL MODE CKSL NOISE SHAPER DGND DGND 5-LEVEL DAC 5-LEVEL DAC RIGHT LEFT GND2R GND2L LOW-PASS FILTER LOW-PASS FILTER RIGHT LEFT EXT1R EXT1L 3-STAGE AMP 3-STAGE AMP EXT2R EXT2L...
Page 68: Ic Pin Function Description
5-5. IC PIN FUNCTION DESCRIPTION • DISPLAY BOARD IC501 µPD780205GF-021-3BA (SYSTEM CONTROL, FL TUBE DISPLAY DRIVE) Pin No. Pin Name Function – +5 V power supply – – Connected to ground DISC. SENS Input of disc sensor signal “L” : No disc, “H” : Disc present TABLE.
Page 69 Pin No. Pin Name Function LED. JOG Output of JOG LED drive LED. ENT Output of ENTER LED drive Disc tray address detection encoder input 2 Disc tray address detection encoder input 1 Disc tray address detection encoder input 0 –...
Page 70: Exploded Views
SECTION 6 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they The components identified by mark may have some difference from the original are seldom required for routine service. Some ! or dotted line with mark ! are one.
Page 71 Remark X-4947-763-1 BUTTON (F/R) ASSY (0, )) 4-985-925-01 KNOB (JOG) X-4947-654-1 PANEL ASSY, FRONT 4-985-892-01 BUTTON (PLAY) (ﬂ, p) 4-962-708-01 EMBLEM (4-A), SONY * 63 A-4699-278-A PANEL BOARD, COMPLETE 4-985-890-01 BUTTON (MODE) 1-777-861-11 WIRE (FLAT TYPE) (29 CORE) 4-951-620-01 SCREW (2.6X8), +BVTP...
Page 72 (3) CD MECHANISM DECK SECTION-1 (DM38A-5BD19) M701 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 201 1-663-322-11 SENSOR BOARD * 208 1-663-323-11 TABLE BOARD 4-981-187-01 COLLAR (WORM) 4-977-941-01 BEARING (WORM) X-4946-295-2 SHAFT ASSY, WORM 4-977-944-01 TRAY (SLIDE) 4-977-956-01 WHEEL, WORM 4-917-583-21 BRACKET, YOKE 4-988-162-11 ROLLER...
Page 73 (4) CD MECHANISM DECK SECTION-2 (CDM38A-5BD19) M801 BU-5BD19 S851 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-4946-296-1 HOLDER (BU) ASSY 4-977-942-01 BELT (SL) (1.4) 4-982-447-01 SPRING (BU), COMPRESSION X-4946-491-1 CAM ASSY, BU 4-985-672-01 SCREW (+PTPWHM2.6), FLOATING * 262 1-452-879-11 MAGNET * 254...
Page 74 (5) BASE UNIT SECTION (BU-5BD19) M101 M102 The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-951-620-01 SCREW (2.6X8), +BVTP 1-769-069-11 WIRE (FLAT TYPE) (16 CORE)
Page 75: Electrical Parts List
SECTION 7 ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark are seldom required for routine service. parts list may be different from the parts speci- ! or dotted line with mark ! are fied in the diagrams or the components used on Some delay should be anticipated when order-...
Page 76 DISPLAY Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R124 1-216-091-00 METAL CHIP 1/10W C506 1-164-005-11 CERAMIC CHIP 0.47uF R125 1-216-069-00 METAL CHIP 6.8K 1/10W C507 1-164-005-11 CERAMIC CHIP 0.47uF R126 1-216-063-00 METAL GLAZE 3.9K 1/10W C508 1-165-319-11 CERAMIC CHIP 0.1uF...
Page 77 DISPLAY LOADING MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R522 1-216-061-00 METAL CHIP 3.3K 1/10W R597 1-249-425-11 CARBON 4.7K 1/4W R523 1-216-025-00 METAL GLAZE 1/10W R598 1-216-049-11 METAL GLAZE 1/10W R524 1-216-073-00 METAL CHIP 1/10W R525 1-216-052-00 METAL CHIP...
Page 78 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C105 1-126-933-11 ELECT 100uF 20% 16V < DIODE > C106 1-162-294-31 CERAMIC 0.001uF 10% 50V C201 1-162-306-11 CERAMIC 0.01uF 20% 16V D301 8-719-024-99 DIODE 11ES2-NTA2B C202 1-126-933-11 ELECT 100uF 20% 16V D302...
Page 79 MAIN PANEL RELAY SENSOR TABLE Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R201 1-249-421-11 CARBON 2.2K 1/4W S602 1-762-196-21 SWITCH, TACT (SKIP) R202 1-249-441-11 CARBON 100K 1/4W S603 1-762-196-21 SWITCH, TACT (DISC 1) S604 1-762-196-21 SWITCH, TACT (DISC 2) R203 1-249-421-11 CARBON 2.2K...
Page 80 7-621-255-15 SCREW +P 2X3 The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Sony Corporation 97D0573-1 Printed in Japan © 1997. 4 9-960-932-11 Home A&V Products Company Published by General Engineering Dept.
Page 81 • Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. MINI DISC SYSTEM MICROFILM 98D001648-1D Printed in Japan ©1998.4 Sony Corporation Published by Quality Assurance Dept. Home A&V Products Company 9-922-856-11 (Shibaura)
Page 82 MDS-EX77 SERVICE MANUAL AEP Model UK Model E Model MDS-EX77 is the mini disc deck section in DHC-MD77/EX77MD. U.S and foreign patents licensed from Dolby Labora- Model Name Using Similar Mechanism MDS-S37 tories Licensing Corporation. MD Mechanism Type MDM-3A Optical Pick-up Name KMS-260A/J1N SPECIFICATIONS MINI DISC DECK...
Page 83 COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
Page 84 CAUTION Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer’s instructions. ADVARSEL! Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering. Udskiftning må kun ske med batteri af samme fabrikat og type.
Page 85: Servicing Notes
SECTION 1 SERVICING NOTES 1-1. POWER SUPPLY DURING SERVICING 1-2. FLUORESCENT INDICATOR TUBE/BUTTONS/ JOG&LEDs CHECK MODE This set has no power supply in it, and it does not operate indi- vidually. Therefore, connect to the pre/main amplifier system (TA- 1. While pressing the CD SYNC + CONTINUE buttons simul- EX77) for the DHC-MD77 or DHC-EX77MD in servicing.
Page 86: Retry Cause Display Mode At Record
1-4. RETRY CAUSE DISPLAY MODE AT RECORD Outline: • In this mode, a cause of retry at recording can be displayed. Thus, it will help find out a faulty location of the set. • The contents displayed are data quantity stored in D-RAM, re- try count, and retry cause.
Page 87 Table 1-1. Description of Retry Cause Display Lower Bit Upper Bit Hexa- Name of Hexa- decimal Description Retry Cause decimal spindle slow When spindle speed slow was detected shock *1 When shock over 3.5 was detected When ADER was counted more than 5 times ader 5 successively Decimal...
Page 88: General
SECTION 2 This section is extracted from instruction manual. GENERAL – 7 –...
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Page 100: Disassembly
SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. CASE, FRONT PANEL SECTION (Page 19) MECHANISM DECK (Page 20) BD BOARD SLIDER COMPLETE BRACKET (T), (L), (R) SUB CHASSIS OVER WRITE HEAD (Page 21) ASS'Y (Page 21) (Page 20) (Page 22)
Page 101 MECHANISM DECK 3 four screws (BVTT3 × 6) 4 mechanism deck 1 flat wire (29 core) (CN402) 2 flat wire (19 core) (CN401) BRACKET (T), (L), (R) 1 four screws (BVTT2 × 3) 3 screw (BVTT2 × 3) 2 bracket (T) 4 bracket (joint) 5 two screws...
Page 102 BD BOARD 2 flat cable (15 core) (CN106) 4 OP relay flexible board (CN101) 1 flexible board (over write head) 5 BD board 3 screws (BVTT2 × 4) SUB CHASSIS 1 two step screws 1 two step screws 2 two insulators 2 two insulators part A part A...
Page 103 SHUTTER ASS’Y 1 stopper washer 2 shaft (shutter) A shutter ass’y shaft (shutter) B 3 shutter ass’y shaft (shutter) A hole B hole A When installing, install the shaft (shutter) A into the hole as show in the figune before installing the shaft (shutter) B into the hole B.
Page 104 SLIDER COMPLETE ASS’Y claw 3 Set the shaft of gear (LB) to be at the position in the figure. claw 45° 1 special screw 2 retainer (gear) 4 Remove the slider complete ass’y (M1.7 × 1.4) in the direction of arrow with putting out of two claws.
Page 105: Test Mode
SECTION 4 TEST MODE 4-1. PRECAUTIONS FOR USE OF TEST MODE 4-5. SELECTING THE TEST MODE 1. As loading related operations will be performed regardless of Thirteen test modes are selected by turning the SELECTOR knob. the test mode operations being performed, be sure to check that the disc is stopped before setting and removing it.
Page 106: Operating The Continuous Playback Mode
4-6. OPERATING THE CONTINUOUS PLAYBACK 4-7. OPERATING THE CONTINUOUS RECORDING MODE MODE 4-6-1. Entering the Continuous Playback Mode 4-7-1. Entering the Continuous Recording Mode 1. Set the disc in the unit. (Whichever recordable discs or discs 1. Set the MO disc in the unit. (Refer to note 3.) for playback only are available.) 2.
Page 107: Eep Mode
4-8. EEP MODE 1. MODE display Displays “TEMP ADJUST”, “CPLAY MODE”, etc.. This mode reads and writes the contents of the non-volatile memory. 2. Error rate display It is not used in servicing. If set accidentally, press the Error rates are displayed as follows. EDIT/NO button immediately to exit it.
Page 108: Electrical Adjustments
SECTION 5 ELECTRICAL ADJUSTMENTS 5-3. PRECAUTIONS FOR ADJUSTMENTS 5-1. PRECAUTIONS FOR CHECKING LASER DI- 1) When replacing the following parts, perform the adjustments ODE EMISSION and checks with ® in the order shown in the following table. To check the emission of the laser diode during adjustments, never view directly from the top as this may lose your eyesight.
Page 109: Temperature Compensation Offset Adjustment
5-5. TEMPERATURE COMPENSATION OFFSET 5-6. LASER POWER ADJUSTMENT ADJUSTMENT Connection: Save the temperature data at that time in the non-volatile memory laser power meter as 25 °C reference data. Notes: 1. Usually, do not perform this adjustment. 2. Perform this adjustment in an ambient temperature of 22 °C to Optical pick-up 28 °C.
Page 110: Traverse (E-F Balance) Adjustment
5-7. TRAVERSE (E-F BALANCE) ADJUSTMENT 8. Turning the SELECTOR knob so that the waveforms of the oscilloscope becomes the specified value. (When the Note 1: Data will be erased during MO reading if a recorded SELECTOR knob is turned, the “ ” of “EFB= MO-W”...
Page 111: Focus Bias Adjustment
5-8. FOCUS BIAS ADJUSTMENT 5-9. ERROR RATE CHECK Adjusting Method: 5-9-1. CD Error Rate Check 1. Load a continuously recorded disc (Refer to “5-4. Creating Checking Method: MO Continuously Recorded Disc”.). 1. Load a test disc TDYS-1. 2. Turning the SELECTOR knob and display “CPLAY MODE”. 2.
Page 112: Adjusting Points And Connecting Points
SECTION 6 DIAGRAMS • Circuit Boards Location 5-11. ADJUSTING POINTS AND CONNECTING POINTS [BD BOARD] (COMPONENT SIDE) CN110 BD board I+3V SW board CN101 D101 PANEL board MAIN board IC192 REC VOL board [BD BOARD] (CONDUCTOR SIDE) IC171 IC101 IC121 –...
Page 113 MDS-EX77 6-1. BLOCK DIAGRAM (1/2) ADDT DADT HR901 OVER WRITE HEAD MD DIGITAL OPTICAL OVER WRITE OVER WRITE OPTICAL EFMO ADDT INPUT HEAD DRIVE HEAD DRIVE DIGITAL IN IC301 Q181, 182 IC181 DIGITAL INPUT WAVE SHAPER CD PLAYER SELECTOR Q180 FILI DIGITAL IC303...
Page 114 MDX-EX77 6-2. BLOCK DIAGRAM (2/2) LINE AMP IC101(1/2) J101 • SIGNAL PATH MIC2 INLP –AD2 SWI2 +AD2 INV2 SWO2 LINE2 : PLAY INLM ADDT ADDT : REC I/O CIRCUIT CONVERTER INRP  MD ANALOG IN CIRCUIT  INRM R-CH RV801 ...
Page 119 • Waveforms – MAIN/DISPLAY Section – – MD MECHANISM DECK Section – 6 IC151 #¡ (CAPA+) (Play Mode) !¡ IC121 @¶ (FS256) 1 IC701 %• (OSC0) 1 IC101 1, 2 (I, J) (Play Mode) 6 IC201 !¡, @§ (BCK1, BCK2) Approx.
Page 120: Md Mechanism Deck Section
• IC Block Diagrams – MD MECHANISM DECK Section – IC101 CXA2523R 43 42 USROP – RF AGC – USRC RFA1 BPF3T RFA2 PEAK3T – HLPT –1 – – –2 – CFST PTGR TEMP PEAK – –2 – BOTTOM 36 BOTM –...
Page 121 IC121 CXD2650R 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 AUX2 SPINDLE GENERATOR SERVO 74 TE MNT0 73 SE MNT1 MONITOR EACH 72 AVSS CONTROL BLOCK...
Page 122: Main/Display Section
– MAIN/DISPLAY Section – IC101 CXA8065S LINE02 LINE1 PMUTE MIC1 LINE01 SW01 MUTE LINE/MIC SWI1 – –A/D1 +D/A1 INV1 – 2.35k +D/A1 +D/AO1 +A/D1 LP1N1 A/DREF – 13.2k VREF LPOUT1 +A/D2 GND1 2.35k LPOUT2 – 13.2k 13.2k INV2 –A/D2 LPIN2 –...
Page 123 IC311 LB1641 T.S.D O.C.P MOTOR MOTOR DRIVE DRIVE FWD/REV/STOP CONTROL LOGIC IC501 LA5620 – STBY ANA5 – SYS3.3 – – 3.3V BACK – DELAY CIRCUIT P. DOWN – DELAY CIRCUIT VREF S. RESET – 58 –...
Page 124: Ic Pin Function Description
6-7. IC PIN FUNCTION DESCRIPTION BD BOARD IC101 CXA2523R (RF AMPLIFIER) Pin No. Pin Name I / O Function I-V converted RF signal I input from the optical pick-up block detector I-V converted RF signal J input from the optical pick-up block detector Middle point voltage (+1.65V) generation output terminal 4 to 9 A to F...
Page 125 BD BOARD IC121 CXD2650R (DIGITAL SIGNAL PROCESSOR, DIGITAL SERVO PROCESSOR, EFM/ACIRC ENCODER/DECODER, SHOCK PROOF MEMORY CONTROLLER, ATRAC ENCODER/DECODER, 2M BIT D-RAM) Pin No. Pin Name I / O Function Focus OK signal output to the system controller (IC401) “H” is output when focus is on SHCK Track jump detection signal output to the system controller (IC401) XBUSY...
Page 126 Pin No. Pin Name I / O Function DVSS — Ground terminal (digital system) Output enable signal output to the external D-RAM Not used (open) XCAS Column address strobe signal output to the external D-RAM Not used (open) Address signal output to the external D-RAM Not used (open) XRAS Row address strobe signal output to the external D-RAM...
Page 127 Pin No. Pin Name I / O Function TRDR Tracking servo drive PWM signal (–) output to the BH6511FS (IC152) TFDR Tracking servo drive PWM signal (+) output to the BH6511FS (IC152) DVDD — Power supply terminal (+3.3V) (digital system) FFDR Focus servo drive PWM signal (+) output to the BH6511FS (IC152) FRDR...
Page 128 MAIN BOARD IC201 CXD8607N (A/D, D/A CONVERTER) Pin No. Pin Name I / O Function INRP R-ch analog signal (+) input terminal INRM R-ch analog signal (–) input terminal REFI Reference voltage (+3.3V) input terminal (for A/D converter section) AVDD —...
Page 129 Pin No. Pin Name I / O Function VDD2 — Power supply terminal (+5V) (for L-ch side D/A converter section, digital system) VDD1 — Power supply terminal (+5V) (for A/D converter section, digital system) VDD1 — Power supply terminal (+5V) (for A/D converter section, digital system) VSS1 —...
Page 130 MAIN BOARD IC401 RU8X12MF-0010 (SYSTEM CONTROLLER) Pin No. Pin Name I / O Function DAOUT0 Output terminal for the test C1 is output when test mode DAOUT1 Output terminal for the test ADER is output when test mode Key input terminal (A/D input) KEY0 ﬂ, ), 0, p, ENTER/YES, EDIT/NO keys input (S701 to S706) Key input terminal (A/D input)
Page 131 Pin No. Pin Name I / O Function LD LOW Loading motor voltage control signal output to the loading motor driver (IC311) — Not used (open) MNT2 Monitor 2 signal input from the CXD2650R (IC121) MNT3 Monitor 3 signal input from the CXD2650R (IC121) LED0 LED drive signal output terminal Not used (open)
Page 132 Pin No. Pin Name I / O Function BEEP Beep sound drive signal output terminal Not used (open) ADARES Reset signal output to the A/D, D/A converter (IC201) “L”: reset SWL-A Not used (open) SEL-B Not used (open) Laser modulation select signal output Playback power: “L”, Stop: “H”, Recording power: 0.5 sec...
Page 133: Exploded Views
Remark Ref. No. Part No. Description Remark X-4947-652-1 PANEL ASSY, FRONT 3-363-099-01 SCREW (CASE 3 TP2) 4-962-708-01 EMBLEM (4-A), SONY * 15 4-985-899-11 CASE 4-985-889-01 BUTTON (REC) (CD SYNC, r REC) * 16 4-985-898-12 PANEL (MDS), BACK 4-985-890-01 BUTTON (MODE)
Page 134 (2) MECHANISM DECK SECTION-1 (MDM-3A) not supplied not supplied supplied not supplied not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-628-167-01 SCREW, STEP 1-660-966-11 OP RELAY FLEXIBLE BOARD 4-987-327-01 INSULATOR * 57 A-4699-092-A BD BOARD, COMPLETE 4-986-959-01 WASHER, STOPPER 1-777-517-11 WIRE (FLAT TYPE) (15 CORE) 4-987-736-01 SHAFT (SHUTTER)
Page 135 (3) MECHANISM DECK SECTION-2 (MDM-3A) not supplied not supplied not supplied M902 M903 M901 HR901 The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref.
Page 136: Electrical Parts List
SECTION 8 ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark parts list may be different from the parts speci- are seldom required for routine service. ! or dotted line with mark ! are critical for safety.
Page 137 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark IC171 8-759-428-58 IC XL24C01AF-E2 R142 1-216-073-00 METAL CHIP 1/10W IC181 8-759-095-65 IC TC74ACT540FS R143 1-216-073-00 METAL CHIP 1/10W IC192 8-759-426-95 IC L88MS33T-TL R144 1-216-025-00 METAL CHIP 1/10W <...
Page 138 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C004 1-126-968-11 ELECT 100uF 20% 50V C372 1-164-159-11 CERAMIC 0.1uF C005 1-126-968-11 ELECT 100uF 20% 50V C391 1-164-159-11 CERAMIC 0.1uF C392 1-164-159-11 CERAMIC 0.1uF C006 1-126-941-11 ELECT 470uF 20% 25V C007...
Page 139 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark D008 8-719-200-82 DIODE 11ES2 Q456 8-729-422-57 TRANSISTOR UN4111 D009 8-719-200-82 DIODE 11ES2 Q461 8-729-422-57 TRANSISTOR UN4111 D011 8-719-200-82 DIODE 11ES2 Q501 8-729-900-80 TRANSISTOR DTC114ES D012 8-719-200-82 DIODE 11ES2 Q502 8-729-422-57 TRANSISTOR UN4111 D013...
Page 140 MAIN PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R302 1-247-895-00 CARBON 470K 1/4W R541 1-247-702-11 CARBON 1/4W ¡ R303 1-249-437-11 CARBON 1/4W R542 1-247-702-11 CARBON 1/4W ¡ R304 1-249-437-11 CARBON 1/4W ¡ R543 1-247-702-11 CARBON 1/4W R311 1-249-429-11 CARBON...
Page 141 PANEL REC VOL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C756 1-164-159-11 CERAMIC 0.1uF R761 1-247-807-31 CARBON 1/4W C758 1-162-215-31 CERAMIC 47PF R762 1-247-807-31 CARBON 1/4W C760 1-162-294-31 CERAMIC 0.001uF 10% 50V C761 1-162-294-31 CERAMIC 0.001uF 10% 50V R763...
Page 142 Ref. No. Part No. Description Remark 1-777-558-11 WIRE (FLAT TYPE) (19 CORE) 1-777-559-11 WIRE (FLAT TYPE) (29 CORE) 1-777-473-11 WIRE (FLAT TYPE) (5 CORE) 1-660-966-11 OP RELAY FLEXIBLE BOARD 1-777-517-11 WIRE (FLAT TYPE) (15 CORE) ¡ 8-583-028-02 OPTICAL PICK-UP KMS-260A/J1N HR901 1-500-396-11 HEAD, OVER WRITE M901...
Page 143 MDS-EX77 Sony Corporation 97D0573-1 Printed in Japan © 1997. 4 9-960-938-11 Home A&V Products Company Published by General Engineering Dept. – 78 – (Shibaura)

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