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HCD-VR50/VR70 3 7 63 1515 0 SERVICE MANUAL E Model HCD-VR50/VR70 is the tuner, deck, CD and amplifier section in LBT-VR50/VR70. Photo: HCD-VR50 Model Name Using Similar Mechanism HCD-DR7AV/XB800AV CD Mechanism Type CDM37L-5BD34L SECTION Base Unit Type BU-5BD34L Optical Pick-up Type...
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THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. 4-214-791-1π VR50: EA REPLACE THESE COMPONENTS WITH SONY PARTS 4-214-792-0π VR70: MY, SP WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS 4-214-792-1π VR70: IA MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. – 2 – http://www.xiaoyu163.com...
http://www.xiaoyu163.com SECTION 1 SERVICING NOTE 3 7 63 1515 0 About CD-TEXT display This unit is provided with a simple CD-TEXT display function. The CD-TEXT contents of 20 tracks are displayed on the fluorescent display tube. Since the function is simple, some special characters may not be displayed, or may be displayed as other characters. MC Cold Reset •...
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http://www.xiaoyu163.com 3 7 63 1515 0 AMS Test Mode • This mode is used for checking the AMS operations of the tape deck. 7-819-039-12 Alignment tape, AMS-110A Procedure: 1. Press the 1/u button to turn the set ON. 2. Set the tape (AMS-110A). 3.
6 Four screw (BVTP 3x8) (BVTP 3x8) L 13942296513 !£ Flat type wire (CN503) 3-2. MAIN BOARD 0 Two screws (BVTP 3x8) (HCD-VR50) !£ Back panel 2 Two screws (BVTP 3x8) !™ Power cord 9 Three screws (BVTP 3x8) 0 Two screws (BVTP 3x8)
http://www.xiaoyu163.com 3 7 63 1515 0 3-3. SUB PANEL 7 Three screws (BVTP 2.6x8) 6 Two screws (BVTP 2.6x8) 4 Two screws (BTP 2.6x6) 1 Two screws (BVTP 2.6x8) 3 Open the CD lid assembly 2 Front input board 9 Two screws (BVTP 2.6x8) 0 Bracket (CD-R2) 5 Screw (BVTP 3x8) 8 Sub panel block...
http://www.xiaoyu163.com 3 7 63 1515 0 3-8. DISC TABLE Note: When the disc table is installed, adjust the positions of roller cam and mark ” as shown in the figure, then set to the groove of disc table. Stop screw Screw (BVTP3X8) Screw (BVTP3X8) Bracket (BU)
http://www.xiaoyu163.com SECTION 4 3 7 63 1515 0 TEST MODE VIDEO CD COLOR-BARS MODE On this mode, the data of the color-bars signal as a picture signal and the 1kHz sine wave signal as a sound signal are output by the mechanism control microcomputer (IC502) for video CD signal check.
http://www.xiaoyu163.com SECTION 5 SECTION 6 MECHANICAL ADJUSTMENTS 3 7 63 1515 0 ELECTRICAL ADJUSTMENTS Precaution DECK SECTION 0 dB=0.775V 1. Clean the following parts with a denatured alcohol-moistened swab: 1. Demagnetize the record/playback head with a head damagnetizer. record/playback heads pinch rollers 2.
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http://www.xiaoyu163.com 3 7 63 1515 0 3. Mode: Playback Tape Speed Adjustment (Deck B) test tape Note: Set the test mode using the following method and begin tape P-4-A100 speed adjustment. (10kHz, –10dB) oscilloscope In the test mode, the speed will switch to double speed or normal speed each time the HI-SPEED DUB button is MD OUT pressed.
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http://www.xiaoyu163.com 3 7 63 1515 0 Record Bias Adjustment (Deck B) Record Level Adjustment (Deck B) Procedure: Procedure: INTRODUCTION INTRODUCTION When set to the test mode performed in Tape Speed Adjust- When set to the test mode performed in Tape Speed Adjust- ment, when the tape is rewound after recording, the “REC memory ment, when the tape is rewound after recording, the “REC memory mode”...
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http://www.xiaoyu163.com 3 7 63 1515 0 Note: Clear RF signal waveform means that the shape “◊” can be CD SECTION clearly distinguished at the center of the waveform. Note: RF signal waveform 1. CD Block is basically constructed to operate without adjustment. Therefore, check each item in order given.
HCD-VR50/VR70 3 7 6 3 1 5 1 5 0 – MAIN (1/2) SECTION – IC191 AV SWITCH J702 VIDEO 1 J804 J702 VIDEO 2 VIDEO VD OUT VIDEO SECTION VCD VIDEO IC101 (Page 28) SOUND PROCESSOR 1 DISPLAY...
HCD-VR50/VR70 3 7 6 3 1 5 1 5 0 – POWER SECTION – DISPLAY MIC-SIG SECTION MIC AMP MIC VOLUME ECHO CONTROL MIC LEVEL MIC AMP (Page 31) IC850 (1/2) RV850 IC851 RV851 IC850 (2/2) J801 MAIN (1/2)
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HCD-VR50/VR70 3 7 6 3 1 5 1 5 0 – DISPLAY SECTION – DISPLAY CONTROL IC601 REMOTE CONTROL SIRCS RECIEVE IC602 S702 SERIAL PARALLEL JOG A ROTARY CONVERTER ENCODER JOG B IC604 D611 – D612, D615, D616, D618 – D621, D623 –...
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HCD-VR50/VR70 3 7 6 3 1 5 1 5 0 WAVEFORMS – VIDEO SECTION – – MAIN (2/5) SECTION – THIS NOTE IS COMMON FOR PRINTED WIRING – CD SECTION – BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.)
HCD-VR50-/VR70 3 7 6 3 1 5 1 5 0 7-4. SCHEMATIC DIAGRAM – BD SECTION – • See page 32 for Waveforms. • See page 98 for IC Block Diagrams. • See page 101 for IC Pin Functions.
HCD-VR50/VR70 7-9. SCHEMATIC DIAGRAM – VIDEO (2/3) SECTION – • See page 34 for Waveforms. • See page 105 for IC Pin Functions. 3 7 6 3 1 5 1 5 0 • See page 43 for Printed Wiring Board.
HCD-VR50/VR70 7-13. SCHEMATIC DIAGRAM – MAIN (2/5) SECTION – • See page 34 for Waveforms. 3 7 6 3 1 5 1 5 0 • See page 51 for Printed Wiring Board. • See page 108 for IC Pin Functions.
http://www.xiaoyu163.com 3 7 63 1515 0 7-37. IC PIN FUNCTIONS • IC101 DIGITAL SIGNAL PROCESSOR (CXD3008Q) (BD Board) Pin No. Pin Name Function DVDD0 — Digital power supply XRST System reset MUTE Muting selection pin DATA Serial data input, supplied from CPU XLAT Latch input, supplied from CPU CLOK...
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http://www.xiaoyu163.com 3 7 63 1515 0 Pin Name Function Pin No. Tracking error signal input Center servo analog input RFDC RF signal input ADI0 Test pin (Not used) AVSS0 — Analog ground IGEN Power supply pin operational amplifiers AVDD — Analog power supply ASYO EFM full swing output...
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http://www.xiaoyu163.com 3 7 63 1515 0 • IC502 MPEG DECODER, MECHANISM CONTROL (M30620MC-A05FP) (VIDEO Board (1/3)) Pin No. Pin Name Function SENSE Internal state (SENSE) monitor input (IC101) SENSE CLK Serial data reading clock output (IC101) DSP DATA Serial data output (IC101) DSP LATCH Lach output (IC101) DSP CLK...
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http://www.xiaoyu163.com 3 7 63 1515 0 Pin Name Function Pin No. BUS XWRL Not used LO. BOOST Not used AUDIO MUTE Audio mute output “L” : mute LOAD OUT Not used LOAD IN Not used INSW Not used OUTSW Not used MODEL 1 L : System input (Fixed at “L”) MODEL 2...
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http://www.xiaoyu163.com 3 7 63 1515 0 • IC505 CD DECODER, SYSTEM CONTROL (CL680T-D1) (VIDEO Board (2/3)) Pin Name Function Pin No. – Not used – Ground CD-BCK CD Decode bit clock CD-DATA CD Decode data CD-LRCK CD Decode Left or Right channel selection clock CD-C2PO CD Decode C2 error data –...
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http://www.xiaoyu163.com 3 7 63 1515 0 Pin Name Function Pin No. Address data from CL680 to Microcode ROM/DRAM – Ground Address data from CL680 to Microcode ROM/DRAM VDD3 – +3.3V Power supply Address data from CL680 to Microcode ROM/DRAM Address data from CL680 to Microcode ROM/DRAM Address data from CL680 to Microcode ROM/DRAM –...
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http://www.xiaoyu163.com 3 7 63 1515 0 Pin Name Function Pin No. PGIO0 Not used PGIO8 Not used PGIO2/VSYNC/CSYNC Vertical synchronized signal of video signal AVDD PLL – +3.3V Power supply – Not used – Not used – Not used AGND PLL –...
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http://www.xiaoyu163.com 3 7 63 1515 0 • IC501 MAIN CONTROL (M30622MA-A09FP) (MAIN board (2/5)) Pin Name Function Pin No. POWER Power amp ON/OFF signal output POWER Power ON/OFF signal output F-RELAY Front speaker relay control output REAR-RELAY Rear speaker relay control output (Not used) CD-POWER CD power on signal output LINE-MUTE...
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http://www.xiaoyu163.com 3 7 63 1515 0 Pin No. Pin Name Function STEREO Stereo detection for tuner TUNED Tuned detection for tuner ST-CE Tuner chip enable output ST-DOUT Tuner data output ST-DIN Tuner data input ST-CLK Tuner clock output SENS BD Condition signal input HOLD MODE signal output CD latch signal output...
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http://www.xiaoyu163.com 3 7 63 1515 0 • IC601 DISPLAY CONTROL (TMP88CS76F-6004) (PANEL FL board) Pin Name Function Pin No. SIRCS Remote commander signal input JOG A Rotary encoder (S702) pulse input LED SCK LED clock signal output LED LATCH LED latch signal output LED DAT LED serial data output LED POWER...
http://www.xiaoyu163.com SECTION 8 EXPLODED VIEWS 3 7 63 1515 0 NOTE: The components identified by • Items marked “*” are not stocked since they are • Abbreviation mark ! or dotted line with mark seldom required for routine service. Some delay : Saudi Arabia model ! are critical for safety.
http://www.xiaoyu163.com 3 7 63 1515 0 8-2. FRONT PANEL SECTION 1 not supplied FL601 not supplied Supplied with RV850 L 13942296513 not supplied Supplied with J803 Supplied with Supplied with J802 J801 not supplied not supplied Ref. No. Part No. Description Remark Ref.
http://www.xiaoyu163.com 3 7 63 1515 0 8-4. CHASSIS SECTION T951 not supplied not supplied not supplied not supplied L 13942296513 CDM37L-5BD34L (EXCEPT IA) (IA) CNP901 CNP901 not supplied The components identified by mark ! or dotted not supplied line with mark ! are critical for safety. Replace only with part number specified.
http://www.xiaoyu163.com 3 7 63 1515 0 8-5. TC MECHANISM SECTION 1 (TCM230AWR2/230PWR2) *NOTE: Two types of parts which are not interchangeable are available for the Head deck (A) ASSY and Head deck (B) ASSY. When replacing the parts, refer to the following figure, and use the appropriate part.
http://www.xiaoyu163.com 3 7 63 1515 0 8-6. TC MECHANISM SECTION 2 (TCM230AWR2/230PWR2) *NOTE: Two types of parts which are not interchangeable are available for the mechanical block assembly. When replacing the parts, refer to the following figure, and use the appropriate part. Parts with “P”...
http://www.xiaoyu163.com 3 7 63 1515 0 8-8. BASE UNIT SECTION (BU-5BD34L) L 13942296513 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.
http://www.xiaoyu163.com SECTION 9 AUDIO ELECTRICAL PARTS LIST 3 7 63 1515 0 Note: • SEMICONDUCTORS • Due to standardization, replacements in the parts list The components identified by In each case, u: µ , for example: may be different from the parts specified in the mark ! or dotted line with mark uA...: µ...