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HCD-DX90 SERVICE MANUAL E Model Ver 1.0 2001.04 HCD-DX90 is the tuner, deck, CD and amplifier section in MHC-DX90. Model Name Using Similar Mechanism HCD-BX9/DX9 CD Mechanism Type CDM58-K2BD38 SECTION Base Unit Type BU-K2BD38 Optical Pick-up Type KSM-213DAP Model Name Using Similar Mechanism...
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 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.
HCD-DX90 SECTION 1 SERVICE NOTE Note for installing the panel board 2 panel board Hot melt 1 Cut the thirteen melted-connection points with a cutting plier. Screw hole Attach the panel board with eleven screws ( +BVTP 2.6 8 ) after the board is removed once.
HCD-DX90 SECTION 2 GENERAL LOCATION OF CONTROLS 2 3 4 DISC SKIP EX-CHANGE button V-GROOVE button and indicator DISC 1 button and indicator CURSOR button and indicator DISC 2 button and indicator GROOVE button DISC 3 button and indicator EQ EDIT button...
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HCD-DX90 This section is extracted from instruction manual. Step 2: Setting the Press ENTER. The minute indication flashes. time You must set the time before using the timer functions. The clock is on a 24-hour system for the European model and a 12-hour system for other models.
HCD-DX90 SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. 3-1. DISASSEMBLY FLOW 3-2. UPPER CASE (TOP) (page 7) 3-3. LOADING PANEL ASSY (page 7) 3-4. FRONT PANEL SECTION, CD MECHANISM DECK (CDM58-K2BD38) (page 8) 3-5.
HCD-DX90 Note: Follow the disassembly procedure in the numerical order given. 3-2. UPPER CASE (TOP) 9 two screws (+BVTP 3 qs upper case (top) 5 two screws (case 3 TP2) 7 two screws (+BVTP 3 0 claw side panel (R)
HCD-DX90 3-6. PANEL BOARD 0 three claws 9 two screws (+BVTP 2.6 7 knob(MIC) qa CD Switch board 6 spring 2 two screws qf panel board (+BVTP 2.6 qd five claws 3 two bosses & four pins 5 FR knob qs Cut the thirteen melted-connection points with a cutting plier.
HCD-DX90 3-10. BASE UNIT (BU-K2BD38) 8 two insulators base unit (BU-K2BD38) 1 flat type wire (CN101) 9 two insulators 6 two springs (insulator), coil 5 stopper (BU) 3 two springs (insulator), coil 2 two screws (+PTPWH 2.6), floating 4 two screws (+PTPWH 2.6) 3-11.
HCD-DX90 SECTION 4 TEST MODE [MC Cold Reset] [Change-over of MW Tuner Step between 9 kHz and • The cold reset clears all data including preset data stored in the 10 kHz] RAM to initial conditions. Execute this mode when returning •...
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HCD-DX90 [MC Test Mode] • This mode is used to check operations of the respective sections of Amplifier, Tuner, CD and Tape. Procedure: Press the ?/1 button to turn on the set. Press the three buttons of x , ENTER and DISC 3 simultaneously.
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HCD-DX90 [Aging Mode] This mode can be used for operation check of CD section and tape deck section. • If an error occurred: The aging operation stops and display status. • If no error occurs: The aging operation continues repeatedly.
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HCD-DX90 2) Operation during aging mode In the aging mode, the program is executed in the following sequence. (1) The disc tray opens and closes. (2) The mechanism accesses DISC 2 and makes an attempt to read TOC. However, since there are no discs, a message “CD2 NO DISC”...
HCD-DX90 SECTION 5 SECTION 6 MECHANICAL ADJUSTMENTS ELECTRICAL ADJUSTMENTS Precaution DECK SECTION 0 dB=0.775 V 1. Clean the following parts with a denatured alcohol-moistened swab: 1. Demagnetize the record/playback head with a head record/playback heads pinch rollers demagnetizer. erase head rubber belts 2.
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HCD-DX90 2. Turn the adjustment screw and check output peaks. If the peaks DECK B Tape Speed Adjustment do not match for L-CH and R-CH, turn the adjustment screw Note: Start the Tape Speed adjustment as below after setting to the test so that outputs match within 1dB of peak.
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HCD-DX90 DECK B REC Bias Adjustment 4. Mode: Record Procedure: INTRODUCTION MD/VIDEO (AUDIO) IN When set to the test mode performed in Tape Speed Adjustment, 315 Hz, 50 mV (–23.8 dB) AF OSC when the tape is rewound after recording, the “REC memory mode”...
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HCD-DX90 FM Tuned Level Adjustment CD SECTION FM RF SSG Note : 1. CD Block is basically designed to operate without adjustment. coaxial Therefore, check each item in order given. 2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated. 3. Use an oscilloscope with more than 10M impedance.
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HCD-DX90 Note: Clear RF signal waveform means that the shape “ ” can be Adjustment Location: clearly distinguished at the center of the waveform. [BD BOARD] (Conductor Side) RF signal waveform VOLT/DIV : 200mV TIME/DIV : 500ns level : 1.45 0.3Vp-p...
HCD-DX90 SECTION 7 DIAGRAMS 7-1. CIRCUIT BOARDS LOCATION THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) MOTOR Board DRIVER Board Note on Schematic Diagram: Note on Printed Wiring Boards: •...
HCD-DX90 AM/FM IF MPX 7-2. BLOCK DIAGRAMS TM601 LPF601 Q602 IC601 CF601 CF602 – TUNER/CD SECTION – RF IF BUFFER L-CH • RCH is omitted ANT IN IF OUT FM IF L OUT Q611 • Signal Path FM 75 OSC OUT...
HCD-DX90 7-4. SCHEMATIC DIAGRAM – BD SECTION – • See page 21 for Wavefoms. • See page 42 for IC Block Diagrams. (TEO) (FEO) (VC) (RFO) OPTICAL PICK-UP BLOCK (KSM-213DAP) (AGCCON) (FE1) (XPCK) MAIN BOARD (3/3) CN201 (Page 29) • Voltages and waveforms are dc with respect to ground The components identified by mark 0 or dotted under no-signal conditions.
HCD-DX90 7-6. SCHEMATIC DIAGRAM – MAIN (1/3) SECTION – • See page 43 for IC Block Diagrams. 220p T601 RV611 NULL FM TUNED LEVEL • Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM...
HCD-DX90 7-7. SCHEMATIC DIAGRAM – MAIN (2/3) SECTION – • See page 21 for Wavefoms. • See page 44 for IC Block Diagrams. • See page 34 for Printed Wiring Board of Head Boards. (Page 29) (Page 29) (Page 29)
HCD-DX90 7-16. SCHEMATIC DIAGRAM – DRIVER SECTION – OPEN CLOSE C712 TABLE ADDRESS SENS MAIN BOARD (3/3) CN202 (Page 29) (UP/DOWN) • Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : CD (STOP)
HCD-DX90 7-18. SCHEMATIC DIAGRAM – TRANS SECTION – S951 CN978 F973 T4A 250V NO504 (Page 31) F972 T4A 250V CN977 NO501 (Page 31) NO506 (Page 31) The components identified by mark 0 or dotted line with mark 0 are critical for safety.
HCD-DX90 7-19. IC PIN FUNCTION DESCRIPTION • MAIN BOARD IC401 M30622MAA-A25FP (MASTER CONTROL) Pin No. Pin Name Description Pin No. Pin Name Description SURROUND 1 Not used. Not used. SURROUND 2 Not used. Not used. SURROUND 3 Not used. Not used.
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HCD-DX90 • PANEL BOARD IC601 TMP88CP77F-1A22 (DISPLAY CONTROL) Pin No. Pin Name Description VOLUME A VOLUME A signal input. VOLUME B VOLUME B signal input. HEADPHONE Head phone detect signal input. H=ON, L=OFF Not used. TUNER TUNER LED driver output.(high active) CD LED driver output.(high active)
HCD-DX90 SECTION 8 EXPLODED VIEWS NOTE: • -XX, -X mean standardized parts, so they may • Abbreviation The components identified by mark 0 or have some differences from the original one. : 120 V AC Area in E model dotted line with mark 0 are critical for safety.
HCD-DX90 8-3. MAIN BOARD SECTION T971 not supplied not supplied The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remarks Ref. No.
HCD-DX90 8-5. BASE UNIT SECTION (BU-K2BD38) The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remarks 0 251 A-4735-080-A BASE ASSY, OP (KSM-213DAP)
HCD-DX90 8-6. TAPE MECHANISM DECK SECTION-1 (TCM-230PWR11) Note: Two different types of tape mechanism are used depending on models. They maintain compatibility as an entire mechanism even though there are some different parts are used. PM901 HP901 PM902 HRPE901 Ref. No.
HCD-DX90 SECTION 9 ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark parts list may be different from the parts speci- are seldom required for routine service.
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HCD-DX90 CD SWITCH DRIVER HEAD (A) HEAD (B) LEAF SW Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R149 1-216-001-00 METAL CHIP 1/10W 1-675-912-14 DRIVER BOARD R158 1-216-111-00 METAL CHIP 390K 1/10W ************* R159 1-216-101-00 METAL CHIP...
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HCD-DX90 LEAF SW MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R1001 1-249-409-11 CARBON 1/4W F C144 1-126-964-11 ELECT 10uF R1002 1-249-409-11 CARBON 1/4W F R1003 1-249-414-11 CARBON 1/4W F C146 1-126-935-11 ELECT 470uF R1004 1-247-834-11 CARBON 1.3K...
HCD-DX90 REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page. Ver. Date Description of Revision...