Sony HCD-VR90AV Service manual

HCD-VR90AV

SERVICE MANUAL

HCD-VR90AV is the tuner, deck, CD and amplifier section in LBT-VR90AV.

Model Name Using Similar Mechanism HCD-VR50/VR70

CD

Section

Tape deck

Section

CD Mechanism Type CDM37L-5BD34L Base Unit Name BU-5BD34L Optical Pick-up Name KSS-213D/Q-NP Model Name Using Similar Mechanism NEW T ape Transport Mechanism T ype TCM-230AWR2/230PWR2

E Model

Amplifier section

Front Speaker: The following measured at AC 120/220/240V, 50/60Hz DIN power output (Rated) 130 + 130W

(6 Ω at 1 kHz, DIN)

Continuous RMS power output (Reference)

160 +160W (6 Ω at 1 kHz, 10% THD)

Center Speaker: DIN power output (Rated) 30W

(8 Ω at 1 kHz, DIN)

Continuous RMS power output (Reference)

40W (8 Ω at 1 kHz, 10% THD)

Rear Speaker: DIN power output (Rated) 30 + 30W

(8 Ω at 1 kHz, DIN)

Continuous RMS power output (Reference)

40 + 40W (8 Ω at 1 kHz, 10% THD)

Inputs PHONO IN (phono jacks): sensitivity 3mV,

impedance 47k Ω

MIX MIC (phone jack): sensitivity 1mV,

impedance 10k Ω

VIDEO1 IN (phono jacks): sensitivity 250mV,

impedance 47k Ω

VIDEO2 IN (phono jacks): sensitivity 250mV,

impedance 47k Ω

MD IN (phono jacks): sensitivity 450mV,

impedance 47k Ω

SPECIFICATIONS

DVD INPUT FRONT (phono jacks): sensitivity 450mV,

impedance 47k Ω

REAR (phono jacks): sensitivity 450mV,

impedance 47k Ω

CENTER (phono jacks): sensitivity 450mV,

impedance 47k Ω

WOOFER (phono jacks): sensitivity 450mV,

impedance 47k Ω

Outputs PHONES (stereo phone jack):

accepts headphones of 8 Ω or more

VIDEO OUT (phono jack): voltage 250mV,

impedance 1k Ω

MD OUT (phono jacks): voltage 250mV,

impedance 1k Ω

WOOFER OUT (phono jack):

voltage 1V, impedance 1k Ω

FRONT SPEAKER: accepts impedance of 8

to 16 Ω

CENTER SPEAKER: accepts impedance of 8

to 16 Ω

REAR SPEAKER: accepts impedance of 8

to 16 Ω

COMPACT Hi-Fi STEREO SYSTEM

Video section

Inputs VIDEO1 IN (phono jacks): 1Vp-p, 75 Ω VIDEO2 IN (phono jacks): 1Vp-p, 75 Ω DVD INPUT VIDEO (phono jacks):

1Vp-p, 75 Ω

Output VIDEO OUT (phono jack): 1Vp-p, 75 Ω S-VIDEO OUT (4-pin/mini-DIN jack):

Y : 1Vp-p, unbalanced, Sync negative, C : 0.286 V p-p, load immpedance 75 Ω

— Continued on next page —

MICROFILM

VIDEO CD/CD player section

System Compact disc and digital audio and video system Laser Semiconductor laser

(λ=780nm) Emission duration: continuous

Laser output Max. 44.6µW*

* This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical

Pick-up Block with 7 mm aperture. Wave length 780 – 790 nm Frequency response 2Hz – 20kHz (±0.5dB) Signal-to-noise ratio More than 90 dB Dynamic range More than 90 dB Video color system format

NTSC, PAL CD DIGITAL OUT (square optical connector jack, rear panel) Wave length: 660 nm Output level: –18dBm

Tape player section

Recording system 4-track 2-channel stereo Frequency response (DOLBY NR OFF)

40 – 13,000Hz (±3dB),

using a Sony TYPE I

cassette

40 – 14,000Hz (±3dB),

using a Sony TYPE II

cassette Wow and flutter ±0.15% W.Peak (IEC)

0.1% W.RMS (NAB)

±0.2% W.Peak (DIN)

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range 87.5 – 108.0 kHz

(100 kHz step)

Antenna FM wire antenna Antenna terminals 75 Ω unbalanced Intermediate frequency 10.7 MHz

AM tuner section

Tuning range Middle Eastern model : 531 – 1,602 kHz

(with the tuning interval set at 9 kHz)

Other models : 531 – 1,602 kHz

(with the tuning interval set at 9 kHz) 530 – 1,710 kHz

(with the tuning interval set at 10 kHz) Antenna AM loop antenna, External antenna terminals Intermediate frequency 450 kHz

General

Power requirements Thai model : 220 V AC, 50/60 Hz Other models : 120 V, 220V, or 230 – 240 V AC, 50/60 Hz

Adjustable with voltage selector Power consumption 280 W Dimensions (w/h/d) Approx. 356 × 423 × 446 mm

incl. projecting parts and controls Mass Approx. 15.0 kg Supplied accessories AM loop antenna (1)

Remote RM-SV100AVB (1)

R6 (size AA) batteries (2)

FM wire antenna (1)

Speaker cords (2)

Video connecting cable

Design and specifications are subject to change without notice.

2

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be damaged by heat.

Flexible Circuit Board Repairing

• Keep the temperature of soldering iron around 270˚C during repairing.

• Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering or unsoldering.

Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATION CHECK

Carry out the “S curve check” in “CD section adjustment” and check that the S curve waveform is output four times.

This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.

The following caution label is located inside the unit.

MODEL IDENTIFICATION — BACK PANEL —

Parts No.

PARTS No. MODEL

4-214-793-0π MY,SP 4-214-793-1π EA 4-214-793-3π IA 4-214-793-4π TH

SAFETY-RELATED COMPONENT WARNING!!

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 .

• Abbreviation IA : Indonesia model EA : Saudi Arabia model MY : Malaysia model SP : Singapore model TH : Thai model

3

TABLE OF CONTENTS

1. GENERAL ·········································································· 5

2. DISASSEMBLY

2-1. Front Panel ········································································· 7 2-2. Main Board ········································································· 7 2-3. Sub Panel ············································································ 8 2-4. CD-L/CD-R Board and CD Lid Assembly························· 8 2-5. Tape Mechanism Deck and Cassette Lid···························· 9 2-6. CD Mechanism Deck ························································· 9 2-7. Base Unit ············································································9 2-8. Disc Table ········································································· 10

3. SERVICE MODE····························································11

4. MECHANICAL ADJUSTMENTS ····························· 15

5. ELECTRICAL ADJUSTMENTS ······························· 15

6. DIAGRAMS

6-1. Circuit Boards Location ··················································· 19 6-2. Block Diagrams

BD Section ······································································· 20 Video Section ··································································· 21 Deck Section····································································· 22 Main (1/2) Section····························································23 Main (2/2) Section····························································24 Power Section···································································25

Display Section································································· 26 6-3. Printed Wiring Board BD Section ································ 28 6-4. Schematic Diagram BD Section ··································· 29 6-5. Printed Wiring Board Video Section ···························· 30 6-6. Schematic Diagram Video (1/3) Section ······················ 31 6-7. Schematic Diagram Video (2/3) Section ······················ 32 6-8. Schematic Diagram Video (3/3) Section ······················ 33 6-9. Printed Wiring Board Main Section ····························· 34 6-10. Schematic Diagram Main (1/5) Section ······················· 35 6-11. Schematic Diagram Main (2/5) Section ······················· 36 6-12. Schematic Diagram Main (3/5) Section ······················· 37 6-13. Schematic Diagram Main (4/5) Section ······················· 38 6-14. Schematic Diagram Main (5/5) Section ······················· 39

6-15. Schematic Diagram Deck Section ································ 40 6-16. Printed Wiring Board Deck Section ····························· 41 6-17. Printed Wiring Board Power Section ··························· 42 6-18. Schematic Diagram Power (1/2) Section ·····················43 6-19. Schematic Diagram Power (2/2) Section ·····················44 6-20. Schematic Diagram Surround Section ························· 45 6-21. Printed Wiring Board Surround Section ······················· 45 6-22. Schematic Diagram FL Section···································· 46 6-23. Printed Wiring Board FL Section································· 47 6-24. Schematic Diagram Panel VR Section ·························48 6-25. Printed Wiring Board Panel VR Section ······················49 6-26. Schematic Diagram TC Panel Section ·························50 6-27. Printed Wiring Board TC Panel Section······················· 51 6-28. Schematic Diagram CD Panel Section ························· 52 6-29. Printed Wiring Board CD Panel Section ······················53 6-30. Schematic Diagram CD Motor Section························54 6-31. Printed Wiring Board CD Motor Section·····················55 6-32. Schematic Diagram Jack Section ·································56 6-33. Printed Wiring Board Jack Section ······························ 57 6-34. Schematic Diagram Trans Section ·······························58 6-35. Printed Wiring Board Trans Section····························· 59 6-36. Schematic Diagram Leaf SW Section ·························· 59 6-37. Printed Wiring Board Leaf SW Section ······················· 59 6-38. IC Block Diagrams ··························································· 60 6-39. IC Pin Functions ······························································· 61

7. EXPLODED VIEWS

7-1. Case and Back Panel Section ··········································· 69 7-2. Front Panel Section 1 ······················································· 70 7-3. Front Panel Section 2 ······················································· 71 7-4. Chassis Section ································································· 72 7-5. TC Mechanism Section 1 (TCM230AWR2/230PWR2) ·· 73 7-6. TC Mechanism Section 2 (TCM230AWR2/230PWR2) ·· 74 7-7. CD Mechanism Section (CDM37M-5BD32L) ················75 7-8. Base Unit Section (BU-5BD32L)·····································76

8. ELECTRICAL PARTS LIST······································· 77

4

Front Panel

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234

SECTION 1

GENERAL

56

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Location of Parts and Controls

1 1/u (Power) button 2 POWER SAVE/DEMO (STANDBY)

button

3 DISPLAY button 4 SPECTRUM ANALYZER button 5 Display window 6 GEQ control button 7 SYNC BASS button 8 SYNC EQ button 9 Remote sensor 0 TUNING MODE button !¡ STEREO/MONO button !™ ENTER/NEXT button !£ TUNER MEMORY button !¢ TUNER/BAND button !∞ TUNING - button !§ TUNING + button !¶ FUNCTION button !• VOLUME knob !ª PHONES jack @º ECHO LEVEL knob @¡ MIC LEVEL knob @™ MIC 1 jack @£ MIC 2 jack @¢ GROOVE button @∞ SUPER WOOFER button @§ MODE button

%∞

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@¶ ª (B Deck) button and indicator @• · (B Deck) button and indicator @ª p (B Deck) button #º 0 (B Deck) button #¡ ) (B Deck) button #™ P (B Deck) button #£ r REC (B Deck) button #¢ HI-SPEED DUB button #∞ CD SYNCHRO button #§ PLAY MODE button #¶ REPEAT button #• 0 (CD) button #ª ) (CD) button $º ·P (CD) button and indicator $¡ p (CD) button $™ DISC SKIP button $£ = AMS + knob $¢ VIDEO2 INPUT jacks $∞ PRO LOGIC button and indicator $§ DVD 5.1 CH $¶ KEY CONTROL # button $• KEY CONTROL b button $ª EDIT button %º NON-STOP button and indicator %¡ FLASH button %™ LOOP button %£ NEXT button

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%¢ PREV button %∞ RETURN button %§ DISC 5 button %¶ DISC 4 button %• DISC 3 button %ª DISC 2 button ^º DISC 1 button ^¡ SELECT button ^™ ACTIVE button ^£ DOLBY NR button ^¢ DIRECTION button ^∞ ) (A Deck) button ^§ 0 (A Deck) button ^¶ p (A Deck) button ^• · (A Deck) button ^ª ª (A Deck) button &º KARAOKE PON/MPX button &¡ DSP button and indicator &™ EFFECT button and indicator &£ ENTER button and indicator &¢ GEQ CONTROL button &∞ P. FILE MEMORY &§ Equalizer indicators &¶ t/CLOCK SET button &• SLEEP button &ª REC button and indicator *º DAILY button and indicator

• AMS is the abbreviation for Automatic Music Sensor.

5

This section is extracted from instruction manual.

6

SECTION 2

)

DISASSEMBLY

Note : Follow the disassembly procedure in the numerical order given.

2-1. FRONT PANEL

3

Connector (CN452)

2

Connector (CN702)

1

Three flat type wires

(CN303,CN304,CN431)

4

7

Front panel

Connector (CN802)

2-2. MAIN BOARD

!£

Back panel

!™

Power cord

6

Four screw (BVTP 3x8)

2

Two screws (BVTP 3x8)

5

Screw (BVTP 3x8

9

Four screws (BVTP 3x8)

0

Two screws (BVTP 3x8)

8

Five screws (BVTP 3x8)

7

Seven screws (BVTP 3x8)

!§

Main board

6

Connector (CN903)

!¡

Fan motor

5

Flat type wire (CN411)

4

Connector (CN412)

1

Flat type wire (CN1

3

!¢

Two screws (BVTP 3x8

T uner unit

7

2-3. SUB PANEL

4

Two screws (BTP 2.6x6)

3

Open the CD lid assembly

8

Sub panel block

5

Screw (BVTP 3x8)

7

Three screws (BVTP 2.6x8)

6

Two screws (BVTP 2.6x8)

1

Two screws (BVTP 2.6x8)

2

Front input board

9

Two screws (BVTP 2.6x8)

0

Bracket (CD-R2)

2-4. CD-L/CD-R BOARD AND CD LID ASSEMBLY

1

Three screws (BVTP 2.6x8)

3

Bracket (CD-L)

4

CD-L board

2

Three screws

(BVTP 2.6x8)

Torsion spring (CD-L)

!£

CD lid assembly

!™

Torsion spring (CD-L)

Sub panel assembly

5

Knob (CD)

6

Nut

0

CD-R board

!¡

Torsion spring (CD-R)

7

Three screws

(BVTP 2.6x8)

9

Bracket (CD-R)

8

Two screws (BVTP 2.6x8)

Sub panel assembly

8

CD lid assembly

2-5. TAPE MECHANISM DECK AND CASSETTE LID

s

)

t

Claw

Holder assembly

Claw

6

Holder (A) assembly

(Refer to lower figure)

1

8

Torsion spring (TC-A)

Three screws (BVTP 2.6x8)

2

Three screw

(BVTP 2.6x8

Cassette lid assembly

4

Cassette lid (A) assembly

(Refer to upper figure)

5

(Refer to upper figure)

Claw

Cassette lid (B) assembly

Portion

A

Portion

B

Portion

9

Torsion spring (TC-B)

7

Holder (B) assembly

(Refer to lower figure)

Portion

A

B

3

T ape mechanism

2-6. CD MECHANISM DECK 2-7. BASE UNIT

1

Five screws (BVTP3x8)

2

CD mechanism

deck

2

Boss

3

1

Yoke fitting

Base uni

9

2-8. 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.

A

2

Screw (BVTP3X8)

3

Bracket (BU)

1

Screw (BVTP3X8)

4

Stop screw

5

Disc table

A

10

SECTION 3

SER VICE MODE

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

• The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer.

Procedure:

1. Press three buttons t/CLOCK SET , ENTER , and 1/u simultaneously.

2. “COLD RESET” is displayed on the fluorescent display tube and reset is executed.

CD Delivery Mode

• This mode moves the pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.

Procedure:

1. Press 1/u button to turn the set ON.

2. Press LOOP button and 1/u button simultaneously.

3. Press the 1/u button again to turn the set OFF.

4. A message “LOCK” is displayed on the fluorescent indicator tube, and the CD delivery mode is set.

MC Hot Reset

• This mode resets the set with the preset data kept stored in the memory. The hot reset mode functions same as if the po wer cord is plugged in and out.

Procedure:

1. Press three buttons t/CLOCK SET , ENTER , and DISC 1 simultaneously.

2. The fluorescent indicator tube becomes blank instantaneously, and the set is reset.

Sled Servo Mode

• This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the pick-up.

Procedure:

1. Press 1/u button to turn the set ON.

2. Press three buttons t/CLOCK SET , ENTER , and DISC 5 simultaneously.

3. The Sled Servo mode is selected, if “CD” is blanking on the fluorescent indicator tube.

4. With the CD in stop status, When ) button is pressed, the pick-up moves outside. When 0 button is pressed, the pick-up moves

inside.

5. To exit from this mode, perform as follows:

1) Move the pick-up to the most inside track.

2) Execute MC cold reset. (Press the three buttons t/CLOCK SET , ENTER , and 1/u button simultaneously.)

Note:

• Always move the pick-up to most inside track when exiting from this mode. Otherwise, a disc will not be unloaded.

• Do not run the sled motor excessively, otherwise the gear can be chipped.

Change-over of AM Tuner Step between 9kHz and 10kHz

• A step of AM channels can be changed over between 9kHz and 10kHz.

Procedure:

1. Press 1/u button to turn the set ON.

2. Select the function “TUNER”, and press TUNER/BAND button to select the BAND “AM”.

3. Press 1/u button to turn the set OFF.

4. Press ENTER and 1/u buttons simultaneously, and the display of fluorescent indicator tube changes to “AM 9k STEP” or “AM 10k

STEP”, and thus the channel step is changed over.

LED and Fluorescent Indicator Tube All Lit, Key Check Mode

Procedure:

1. Press three buttons t/CLOCK SET , ENTER , and DISC 2 simultaneously.

2. LEDs and fluorescent indicator tube are all turned on.

Press DISC 2 button, and the key check mode is activated.

3. In the key check mode, the fluorescent indicator tube displays “K0 V0 J0”. Each time a button is pr essed, “K”value increases. Howe ver ,

once a button is pressed, it is no longer taken into account. “J” Value increases like 1, 2, 3 ... if rotating = AMS + knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “-” direction. “V” Value increases like 1, 2, 3 ... if rotating V OLUME knob in “+” direction, or it decreases lik e 0, 9, 8 ... if rotating in “-” direction.

4. To exit from this mode, press three buttons in the same manner as step 1, or disconnect the power cord.

11

AMS Test Mode

• This mode is used for checking the AMS operations of the tape deck.

JIG 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. Press the three buttons t/CLOCK SET , ENTER , and DISC 3 button simultaneously.

4. “TEST MODE” is displayed on the fluorescent display tube. At the same time, the VOLUME indicator blinks.

5. Press the FUNCTION button and switch the function to the deck with the tape (AMS-110A).

6. Press the CD SYNCHRO button. “AMS CHECK” is displayed on the fluorescent display tube and the tape is rewound.

7. AMS starts in the normal direction. If the AMS count is 2 at shut down, proceed to step 8. “NG” is displayed at other times, and the deck stops.

8. AMS starts in the opposite direction. If the AMS count is 2 at shut down again, “OK” is displayed. “NG” is displayed at other times.

Aging Mode

During the aging mode, both the CD player and tape deck are executed together.

• If an error occurs:

Aging stops, and the error state is displayed on the fluorescent display tube.

• If no error occurs:

Aging is repeated.

Procedure:

1. Press the 1/u button to turn the set ON.

2. Load 10 minute tapes with unbent rec-proof tabs in decks A and B.

3. Set CDs on the DISC 1 and DISC 4 tables.

4. Set the CD mode REPEAT to OFF and PLAY MODE to ALL DISCS. (Press the PLAY MODE and REPEAT buttons to set these modes.)

5. Press the FUNCTION button to switch the function to “CD”.

6. Press the three buttons t/CLOCK SET , ENTER , and DISC 4 button simultaneously.

7. Aging starts.

8. To end aging, press the 1/u button to turn the set OFF.

Aging Sequence:

Aging is performed in the following sequence.

• Tape Deck

1. The tape in deck A is rewound. “TAPE A AG-1” is displayed.

2. The FWD side of deck A is played for two minutes. “TAPE A AG-2” is displayed.

3. The tape in deck A is fast forwarded. “TAPE A AG-3” is displayed. Fast forward is carried out for 20 seconds or to the tape end.

4. The RVS side of deck A is played for two minutes. “TAPE A AG-4” is displayed.

5. The tape in deck A is rewound. “TAPE A AG-5” is displayed.

6. The FWD side of deck B is played for two minutes. “TAPE B AG-2” is displayed.

7. The tape in deck B is fast forwarded. “TAPE B AG-3” is displayed. Fast forward is carried out for 20 seconds or to the tape end.

8. The RVS side of deck B is played for two minutes. “TAPE B AG-4” is displayed.

9. The tape in deck A is rewound. “TAPE A AG-5” is displayed.

10. Repeated from step 2.

12

SELF-DIAGNOSIS

This model has the self-diagnosis function for the VIDEO and AUDIO decoder sections. Immediately after the power on, the self-diagnosis function searches each operation of IC’s around the mechanism control microcomputer (IC701). The results can be checked by D502 of the VIDEO board.

• When D502 turns on the IC is normal.

• When D502 flashes twice, the MPEG decoder (IC505) is abnormal.

• When D502 flashes three times, the MPEG decoder (IC505) or the DRAM (IC507) is abnormal.

[VIDEO BOARD] (SIDE A)

D502

IC505

91

90

65

64

100

1

32

33

13

[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. When measurement of the voltage and waveform on the VIDEO board, perform it in this mode. For refernce, the color-bars signal can be observed at J302 (VIDEO OUT) and the sound signal can be observed at J101 (VIDEO/MD (AUDIO) OUT) using an oscilloscope.

1. Connect the lead wire to both ends of the land of SL503 of the VIDEO board.

2. Turn the power on. Press FUNCTION button to select CD.

3. After 2 or 3 seconds later, connect the lead wire.

4. After measuring, remove the lead wire connected.

[VIDEO BOARD] (SIDE A)

D502

SL501

SL502

SL503

TEST MODE

IC505

[VIDEO BOARD] (SIDE B)

SL503

TEST

MODE

SL502 SL501

IC502

CT503

VIDEO FREQUENCY

IC507

14

SECTION 4

MECHANICAL ADJUSTMENTS

SECTION 5

ELECTRICAL ADJUSTMENTS

Precaution

1. Clean the following parts with a denatured alcohol-moistened

swab: record/playback heads pinch rollers erase head rubber belts capstan idlers

2. Demagnetize the record/playback head with a head demagnetizer.

3. Do not use a magnetized screwdriver for the adjustments.

4. After the adjustments, apply suitable locking compound to the parts adjusted.

5. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

Torque Measurement

Mode

FWD

back tension

REV

back tension

FF/REW

FWD tension

REV tension

Torque meter

CQ-102C

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

Meter reading

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

71 to 143 g • cm

(0.98 – 1.99 oz • inch)

100 g or more

(3.53 oz or more)

100 g or more

(3.53 oz or more)

DECK SECTION 0 dB=0.775V

1. Demagnetize the record/playback head with a head demagnetizer.

2. Do not use a magnetized screwdriver for the adjustments.

3. After the adjustments, apply suitable locking compound to the parts adjusted.

4. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in this service manual. (As a general rule, playback circuit adjustment should be completed before performing recording circuit adjustment.)

6. The adjustments should be performed for both L-CH and RCH.

7. Switches and controls should be set as follows unless otherwise specified.

Tape Signal Used for

P-4-A100

WS-48B

P-4-L300

Record/Playback Head Azimuth Adjustment (Deck A, Deck B)

Note: Perform this adjustments for both decks.

Procedure:

1. Mode : Playback

test tape P-4-A100 (10kHz, –10dB)

10 kHz, –10 dB

3 kHz, 0 dB

315 Hz, 0 dB

MD OUT

Azimuth Adjustment

Tape Speed Adjustment

Level Adjustment

level meter

set

+ –

2. Turn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1 dB of peak.

L-CH peak

screw position

R-CH peak

output level

within 1 dB

L-CH peak

R-CH peak

within 1dB

screw position

15

3. Mode: Playback Tape Speed Adjustment (Deck A)

test tape P-4-A100 (10kHz, –10dB)

oscilloscope

MD OUT

Note: Set the test mode using the following method and begin tape

speed adjustment. In the test mode, the speed will switch to double speed or normal speed each time the HI-SPEED DUB button is pressed.

set

Waveform of oscilloscope

in phase 45

good

°

90

135

°

wrong

180

°

4. After the adjustments, apply suitable locking compound to the parts adjusted.

Adjustment Location: Playback Head (Deck A)

Record/Playback/Erase Head (Deck B)

Remove the cassette lid.

Procedure:

With the power turned ON, press the t/CLOCK SET button, ENTER button, and DISC 3 button simultaneously. (The “VOLUME” on the fluorescent display tube will blink while in the test mode.) To exit the test mode, press the 1/u button.

1. Insert the WS-48B into deck B.

2. Press the · button of deck B.

3. Press the HI-SPEED DUB button and play the tape at double speed.

4. Adjust RV1001 of the LEAF SW board so that the reading of the frequency counter becomes 6000 ± 180 Hz.

5. Press the HI-SPEED DUB button and play the tape at normal speed.

6. Adjust RV1002 of the LEAF SW board so that the reading of the frequency counter becomes 3000 ± 90 Hz.

Adjustment Location: LEAF SW board

Sample Value of Wow and flutter

W.RMS (JIS) less than 0.3% (test tape: WS-48B)

Playback Level Adjustment (Deck A, Deck B)

Procedure:

Mode: Playback

Reverse Foward

test tape P-4-L300 (315Hz, 0dB)

set

MD OUT

level meter

Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301 (L-CH) and RV401 (R-CH) so that adjustment within the following adjustment level.

Adjustment level:

CN301 playback level: 301.5 to 338.3 mV (–8.2 to –7.2 dB) level difference between the channels: within ± 0.5 dB Adjustment Location: AUDIO board

Adjustment Location [LEAF SW BOARD] (Conductor Side)

RV1001(High Speed) RV1002(Normal Speed)

RV1001

RV1002

16

Record Bias Adjustment (Deck B)

AF OSC

VIDEO 1 (AUDIO) IN 315Hz 50 mV (–23.8 dB)

blank tape CS-123

set

attenuator

600

Ω

Record Level Adjustment (Deck B)

Procedure:

INTRODUCTION

When set to the test mode performed in T ape Speed Adjustment, when the tape is rewound after recording, the “REC memory mode” which rewinds only the recorded portion and playback is set. This “REC memory mode” is convenient for performing this adjustment. During recording, the input signal FUNCTION will automatically switch to VIDEO 1. (After recording, press the 0 button without stopping will return to the position where recording was started.)

1. Press FUNCTION button to select VIDEO 1. (This step is not necessary if the above test mode has already been set.)

2. Insert a tape into deck B, press the r REC button, and then press the · button to start recording.

3. Mode: Record

4. Mode: Playback

VIDEO 1 (AUDIO) IN

1) 315 Hz

2) 10 kHz

AF OSC

attenuator

600

Ω

} 50 mV (–23.8 dB)

blank tape CS-123

set

Procedure:

INTRODUCTION

When set to the test mode performed in T ape Speed Adjustment, when the tape is rewound after recording, the “REC memory mode” which rewinds only the recorded portion and playback is set. This “REC memory mode” is convenient for performing this adjustment. During recording, the input signal FUNCTION will automatically switch to VIDEO 1. (After recording, press the 0 button without stopping will return to the position where recording was started.)

1. Press FUNCTION button to select VIDEO 1. (This step is not necessary if the above test mode has already been set.)

2. Insert a tape into deck B, press the r REC button, and then press the · button to start recording.

3. Mode: Record

4. Mode: Playback

5. Confirm playback the signal recorded in step 2 become

recorded position

set

MD OUT

level meter

adjustment level as follows. If these levels do not adjustment level, adjust the RV341 (LCH) and R V441 (R-CH) on the A UDIO board to repeat steps 3 and 4.

Adjustment level: The playback output of 10 kHz lev el dif ference

against 315 Hz reference should be ± 1.0 dB.

Adjustment Location: AUDIO board

Adjustment Location:

[AUDIO BOARD] (Conductor Side)

RV341(Lch),RV441(Rch) Record Bias

RV311(Lch),RV411(Rch) Playback Level (Deck A)

5. Confirm playback the signal recorded in step 2 become

recorded position

set

MD OUT

level meter

adjustment level as follows. If these levels do not adjustment level, adjust the RV301 (LCH) and R V351 (R-CH) on the MAIN board to repeat steps 3 and 4.

Adjustment level:

CN403 playback level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)

Adjustment Location: MAIN board

[MAIN BOARD] (Conductor Side)

RV301 RV401

RV441 RV341

RV301(Lch),RV401(Rch) Playback Level (Deck B)

RV311

RV411

Record Level (Lch) RV301

1 3

14

15

28

1

IC301

RV351 Record Level (Rch)

29

56

42

43

17

CD SECTION

Note:

1. CD Block is basically constructed to operate without adjustment. 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 10MΩ impedance.

4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks.

Note: Clear RF signal waveform means that the shape “◊” can be

clearly distinguished at the center of the waveform.

RF signal waveform

VOLT/DIV : 200mV TIME/DIV : 500ns

level : 1.75 ± 0.25 Vp-p

S Curve Check

oscilloscope

BD board

TP (FE) TP (VC)

+ –

Adjustment Location: BD board

Procedure :

1. Connect the oscilloscope to test points TP (FE) and TP (VC).

2. Connect TP (FEI) and GND, and TP (AGCCON) and GND of the BD board with lead wires.

3. Press the 1/u button to turn the set ON.

4. With the disc (YEDS-18) loaded, press the ^ button and perform focus search. (Focus search will be performed in the same way even while the disc table is pushed in and out.)

5. Check the symmetry and peak to peak level of the oscilloscope waveform (S curve) at this time.

S-curve waveform

symmetry

A

Within 4.0

B

±

1.0 Vp-p

6. After check, remove the lead wire connected in step 2.

Note: • Try to measure several times to make sure than the ratio

of A : B or B : A is more than 10 : 7.

• Take sweep time as long as possible and light up the brightness to obtain best waveform.

Adjustment Location: BD board

E-F Balance (Traverse) Check

oscilloscope

BD board

TP (TE) TP (VC)

+ –

Adjustment Location: BD board

Procedure :

1. Connect oscilloscpe to test point TP (TE) on BD board.

2. Short-circuit SL502 of the video board to GND.

3. Turned Power switch on. Press FUNCTION button to select CD.

4. Put disc (YEDS-18) in to play the number five track.

5. Press the PLAY MODE button. (The tracking servo and the sledding servo are turned OFF.)

6. Check the level B of the oscilliscope's waveform and the A (DC voltage) of the center of the Traverse waveform. Confirm the following : A/B x 100 = less than ± 22%

Traverse waveform

Center of the waveform

B

0V

level : 1.3 ± 0.6 Vp-p

A (DC voltage)

7. Press the PLAY MODE button. (The tracking servo and sledding servo are turned ON.) Confirm the C (DC voltage) is almost equal to the A (DC voltage) is step 7.

RF Level Check

oscilloscope

BD board

TP (RF) TP (VC)

+ –

Procedure :

1. Connect oscilloscope to test point TP (RF) and TP (VC) on BD board.

2. Connect TP (AGCCON) and GND of the BD board with lead wires.

3. Press the 1/u button to turn the set ON.

4. Put disc (YEDS-18) in and playback 5track.

5. Confirm that oscilloscope waveform is clear and check RF signal level is correct or not.

6. After check, remove the lead wire connected in step 2.

18

Traverse waveform

C (DC

0V

Tracking servo Sled servo OFF

Tracking servo Sled servo ON

voltage)

8. Desolder the short-land (SL502) short-circuited at step 2.

Adjustment Location: BD board

Adjustment Location :

d

[ BD BOARD ] — SIDE B —

TP

(RF) TP (VC)

TP

(TE)

TP (AGCCON)

(FE)

6-1. CIRCUIT BOARDS LOCATION

FL board

TC-A board

SECTION 6

DIAGRAMS

SURROUND AMP board

TUNER UNIT

JACK board

VIDEO boar

TC-B board

TP (IOP)

VIDEO SECTION

Frequency adjustment

1. Connect the frequency counter to check point TP508 (27MHz) of the VIDEO board.

2. Adjust CT503 of the VIDEO board so that the frequency counter read 27MHz ± 80Hz at STOP condition.

Adjustment Location :

[ VIDEO BOARD ] – SIDE A –

D502

SL502

SL501

TEST MODE

SL503

frequency counter

VIDEO board (27 MHz)

[ VIDEO BOARD ] – SIDE B –

TP508

(27MHz)

IC506

PANEL VR board

TRANS board

FRONT INPUT board

LED (PANEL) board

MAIN boar

+ –

CD-L board

DOOR SW board

CD-R board

PA board

TABLE SENSOR board

CT503

VIDEO

FREQUENCY

TP508

(27MHz)

(GND)

IC505

IC507

(GND)

SL503

TEST

SL502

MODE

SL501

IC502

LEAF SW board

AUDIO board

BD board

CD MOTOR board

LED (CD) board

1919

HCD-VR90AV

6-2. BLOCK DIAGRAMS

BD SECTION

OPTICAL PICK-UP BLOCK

(KSS-213D/Q-NP)

DETECTOR

E

A

C D

B

F

C D B

VCC VC

DIGITAL SERVO

RF AMP

IC103

A

5

C

7

D

8

B

6

RF

SUMMING

AMP

FOCUS

ERROR

AMP

RF EQ

AMP

RFO

RFI

16

17

FE

14

INTEGRATOR

DIGITAL SIGNAL PRCESSOR

IC101

RF AC

50

ASYI

49

ASYO

48

ASYMMETRY CORRECTION

DEMODULATOR

DIGITAL

PLL

EFM

32K

RAM

REGISTER

SUB CODE

PROCESSOR

DATA BUS

ERROR

CORRECTOR

D/A

INTERFACE

DIGITAL

OUT

D OUT

PCM-D

BCLK LRCK C2PO MUTE

64

66 67

65 14

3

1

DOUT

ADATA

BCLK LRCK C2PO MUTE

IC781

CD DIGITAL

OUT

OPTICAL

E F

LD

DRIVE

Q101

LD

LASER

TRACKING

COIL

FOCUS

COIL

DIODE

LD

POWER

M102 SLED

MOTOR

M101

SPINDLE

MOTOR

T+

T–

F+

F–

SD+

M

SD–

SP+

M

SP–

PD

16

E

11

F

10

LD

3

PD

4

FOCUS/TRACKING COIL DRIVE SPINDLE/SLED MOTOR DRIVE

12

11

14

13

17

18

15

16

IC102

APC LD

AMP

TRACKING

ERROR

AMP

5 6

2 3

24 23

25 27

TFDR TRDR

FFDR FRDR

SFDR SRDR

VC

BUFFER

VC

21

LD ON

TE

REF

13

DIGITAL

CLV

IC104

GENERATOR

SERVO

AUTO

SEQUENCER

SERVO

INTERFACE

CLOCK

CPU

INTERFACE

A/D

CONTROL

SIGNAL

BLOCK SERVO

BLOCK

SERVO DSP

TRACKING

SERVO

FOCUS SERVO

SLED

SERVO

DETECTOR

MIRR DFCT

FOK

12

VC

38

INTEGRATOR

VC

RFDC

43

FE

39

TE

41

CE

42

VC

SE

40

TFDR

31

TRDR

32

FFDR

33

FRDR

34

SFDR

29

SRDR

30

MDP

25

OP AMP

ANALOG SW

GENERATOR

TRACKING

PWM

GENERATOR

FOCUS

PWM

GENERATOR

SLED PWM

GENERATOR

CONVERTER

PWM

22

XTAI

XTSL

SENS

DATA

XLAT

CLOK SCOR SQSO

SQCK

S STOP

SCLK

XRST

71

69

7

4 5

6 15 76 77

26

8

82

S101

LIMIT SW

4

2

A+5V

(XTAL 33.8MHz)

MCK

CTRL1 SENS

DATA XLT

CLK SCOR

SUBQ SQCK

SCLK

LPH

CTRL2 XRST

LD ON

• SIGNAL PATH : CD AUDIO

: Digital out

: CD VIDEO

VIDEO

A

SECTION

(Page 21)

MUTE

XRST

20

2020

VIDEO SECTION

HCD-VR90AV

CD

SECTION

(Page 20)

D-RAM

IC507

RAS

UCAS

LCAS

A0

A8

DQ1

2-5•7-10•31-34•36-39

MECHA. CONTROL

IC502

RASO

16-19•22-26

CAS

ADATA

BCLK

LRCK

C2P0

LEVEL SHIFT

1

13

5

IC501

DATAI DATAO

CLK1 HRDY INT HSEL RST

INVERTER

CLK1, DATA0

Q502

13 14 28 29

38 42 40

MWE WE

CD-DATA

4

10

8

4

CD-BCK

3

CD-LRCK

5

6 CD-C2P0

HD-OUT

112

HD-IN

119

HCK

117

HRDY

113

HINT

114

HSEL

121

RESET

60

PGIO2/VSYNC/CSYNC

93

A

DATA0 DATAI CLK1 INT HSEL HRDY RESET

DATA

XLT

CLK SENS SCLK

MUTE CTRL1 CTRL2

LDON

SCOR

SUBQ

SQCK

31

DATA1O

32

DATA1I

33

CLK1

20

CL680 INT CL680 HSEL

21

CL680 HRDY

23 24

680 RESET

45 BUS

3

DSP DATA

4

DSP LATCH

5

DSP CLK

1

SENSE

2

SENSE CLK

10

DSP MUTE

11

CTRL1(L:DOUBLE)

27

CTRL2

28

LDON

18

SCOR

36

SUBQ DATA SUBQ CLK

37

DEVICE RESET

77

DQ16

VIDEO/CD DECODER

IC505

SHARPNESS

DF LATCH

A7

XIN

XOUT

NT/PAL

TEST LED

XRESET

2

I

C.CLK

2

I

C.DATA

O0

13-15•17-21 25•4•28•29•3•2•30 12-5•27•26•23

10-15•17•19•21•23-29

MD0

34 22 65

15

13

93

73

12 29 30

O7

10MHz

+5V

ROM

IC506

A11

58-56•54•52-50•48•46-44

MA0

MD15

X501

D502

A17

S501

SYSTEM

SELECT

A0

A10

22

37

MA10

Y-OUT

C-OUT

DA-DATA

DA-LRCK

DA-BCK

VCK-IN

DA-XCLK

NTSC AUTO

PAL

CE

MCE

MAIN(1/2)

CD-L

XRST CLK DATA

SECTION

(Page 23)

B

J301

S VIDEO

OUT

C

MAIN(1/2)

SECTION

(Page 23)

D

MAIN(2/2)

SECTION

(Page 24)

OUTPUT AMP

IC401

69

75

110 108

111 106

86

BUFFER

Q301

TRAP

Q302,306,307

BUFFER

Q303,304

DATA0 CLK1

27MHz

6

384FS

8

768FS

12

18 19 17

9 8 7

LEVEL SHIFT

IC504

MIX AMP Q308,310

DIGITAL FILTER & D/A CONVERTER

D/A

CONV

MODE

10 204

RSTB

3

11

1

IC509

5

CLOCK

DIVIDER

PLM

21

3.3V REG Q531

7

13

MUTE

Q454

MUTE

Q453

AMP

IC101

14

R-CH

11

1

24

X503

27MHz

CT503

VIDEO

FREQUENCY

+3.3VD5V

13

VCD VIDEO

4

132

• R CH is omitted

• SIGNAL PATH : CD AUDIO

XRST

16

MCK

(XTAL 33.8MHz)

: CD VIDEO : Y : CHROMA

2121

HCD-VR90AV

DECK SECTION

HP101 PB HEAD (DECK A)

REC/PB HEAD

(DECK B)

HRPE101

S1004 A CrO

RV311

IC611

L

R

L

R

R CH

IC602

IC601

1

3

R

P

4

PLAYBACK

LEVEL

DECK A

RV301

PLAYBACK

LEVEL

DECK B

RV341

REC

BIAS

REC BIAS

A IN

48

B IN

46

36

PB-A/B

+7.5V

38

RV301

REC LEVEL

16

Q623

17

A 120/70

RECOUT

39

S1008

2

B CrO

2

19

B NORM/CROM/METAL

70

120

DOLBY NR IC301

DOLBY TYPE B

BIAS SW

DOLBY NR

N

C

32 33

28

PAS

DOL

27

PB

REC/PB/PASS

MS

PB OUT

LIN

ALC ON/OFF

NORM/HIGH

BIAS ON/OFF

RM ON/OFF

LM ON/OFF

CN301

1

R CH

3

40

43

15 18 20 22 23NR ON/OFF NR ON/OFF 24 25

26

TC PB L

TC REC L

ALC ON/OFF

NORM/HIGH BIAS ON/OFF RM ON/OFF

REC/PB/PASS LM ON/OFF

MS OUT

MAIN(1/2)

SECTION

(Page 23)

E F

MAIN(1/2)

SECTION

(Page 23)

ERASE HEAD

ERASE BIAS

BIAS OSC

T621, Q621, 622

M1

CAPSTAN

MOTOR

PB A/B RELAY

CAP MOTOR

CONTROL Q336-343

M

SPEED

CONTROL

Q1001

SWITCH

Q335

CAPM CNT1 CAPM CNT2

CAP M H/L

• R CH : Same as L ch

• SIGNAL PATH : PB (DECK A) : PB (DECK B)

RV1002

NORMAL

SPEED

RV1001

HIGH

SPEED

: REC (DECK B)

+5V

S1001 (A PLAY) S1002 (B PLAY)

S1003 (A HALF)

S1005 (REC A)

16

S1006 (B HALF)

S1009 (REC B)

+5V

A PLAY B PLAY

A HALF

B HALF/REC A/REC B

G

MAIN(2/2)

SECTION

(Page 24)

• PLUNGER SOLENOID is supplied as the MECHANICAL BLOCK ASSY.

A DECK/B DECK

PLUNGER

2222

REEL

DETECT

IC1001

REEL

DETECT

IC1002

TRIGGER MOTOR CONTROL

Q331-334

A SHUT

B SHUT

B TRIG A TRIG

MAIN (1/2) SECTION

VIDEO

SECTION

(Page 21)

DECK

SECTION

(Page 22)

B

DVD VIDEO

FM/AM TUNER TUNER UNIT IS SUPPLED AS THE ASSEMBLED BLOCK

E

VIDEO 2

IN

VIDEO 1

IN

PHONO

(L IN)

J804

J702

J701

ST-L

TC PB L

AV SWITCH

8

IN4VCD VIDEO

6

IN3

IN2

4

IN1

1

2 3 5

46 45 28

IC191

VD OUT

HCD-VR90AV

J702

TC REC L

SPEANA

L-CH SIG

VIDEO

OUT

MD OUT

F

J

I

DECK

SECTION

(Page 22)

DISPLAY

SECTION

(Page 26)

POWER

SECTION

(Page 25)

10

CBA

IC601

PHONO AMP

3

1

SOUND PROCESSOR 1

69

IN A2

IN B2

68

IN C2

67

IC101

REC B2

REC A2

L+R

BUS OUT2

BUF IN2

BBB2 BBA2

J701

57

58

30

36 37 38 39

MUTE

SWITCH

Q113

VIDEO

SECTION

(Page 21)

POWER

SECTION

(Page 25)

16

C

H

MD (L IN)

V1, AU,

L-CH IN

V2, AU,

L-CH IN

FRONT

(L IN)

CENTER

IN

REAR (L IN)

WOOFER

IN

CD-L

J701

MIC-SIG

J701

J804

J703

IC181 SELECTOR

12

X0

X1

14

15

X

X2

BA

10 9

46 45

IN D2

66

DBFB

MAIN CONTROL

DBFB-H/L SW-MODE 493-LAT 493-DATA 493-CLK PL-CLK PL-DATA PL-LAT V_MUTE FUNC_SEL1 FUNC_SEL0

IC501 (1/2)

RESET

12

F-RELAY

LINE-MUTE

INV

Q801

INV

Q804

3

INV

Q803

6

INV

Q802

F-RELAY

RESET

CENTER

65

IN E2

MIC IN

2

13

64

IN F2 KEY IN2

60

D OUT 2

59

SUPER WOOFER

72

SURROUND PROCESSOR

IC201

1

L

74

LT-IN

76

C-IN

LATCH

DATA

CLOCK

SCK

DATA

REQ

VOLOUT C

Q115

SWITCH

38 47 48

23 22 24

3

SWITCH

EVER+5V

Q111

D805

Q112

SWITCH

28 45 46

IC800 RESET

1 3

GEN

7 34 38 47 48 23 24 25 28 45 46

K

L

M

N

77

79

80

SL-IN

SW-IN

VRSW-IN

VOLOUT SL

VOLOUT SW

9

17

MUTE

SWITCH

Q731

MUTE

SWITCH

Q281

MUTE

SWITCH

Q271

REAR-L

J704

WOOFER

OUT

POWER

SECTION

(Page 25)

POWER

SECTION

(Page 25)

DISPLAY

SECTION

(Page 26)

POWER

SECTION

(Page 25)

• R CH: Same as L ch

• SIGNAL PATH : FM : TC PB : TC REC : CD AUDIO : CD VIDEO

2323

HCD-VR90AV

MAIN (2/2) SECTION

O

POWER

SECTION

(Page 25)

P

POWER

SECTION

(Page 25)

G

DECK

SECTION

(Page 22)

FM/AM TUNER TUNER UNIT IS

SUPPLED AS THE

ASSEMBLED

BLOCK

PL-RELAY

FAN.DET

HP.SW

B TRIG

A TRIG CAPM CNT2 CAPM CNT1

CAP M H/L

MS OUT

LM ON/OFF

REC/PB/PASS

NR ON/OFF

RM ON/OFF

BIAS ON/OFF

NORM/HIGH

PB A/B ALC ON/OFF

B PLAY A PLAY

A HALF

B HALF/REC A/REC B

B SHUT A SHUT

RELAY

ST-MUTE

STEREO

TUNED

ST-CE

ST-DOUT

ST-DIN

ST-CLK

4

PL-RELAY

36 H/P IN

72

B-TRG

73

A-TRG

74

CAPM-CNT 2

75

CAPM-CNT 1

76

CAP-M-H/L

77

AMS IN

78

TC-MUTE

79

R/PB/PAS

80

NR-ON/OFF

81

REC-MUTE

82

BIAS EQ-H/N

83

PB-A/B

84

ALC

85

B-PLAY-SW

86

A-PLAY-SW

87

A-HALF

88

B-HALF

89

B-SHUT

90

A-SHUT

91

TC-RELAY

100

ST-MUTE

49

STEREO

50

TUNED

51

ST-CE

52

ST-DOUT

53

ST-DIN

54

ST-CLK

55

MAIN CONTROL

IC501 (2/2)

STK-POWER

ENC 3/UP-SW

ENC 2/DISC-LED

1

HP MUTE PROTECT

XRST XRST

IIC-DATA

IIC-CLK

WAKE UP

TBL-L

TBL-R

DISC-SENS

93 27

59

30 29

18

63

65

61

68

69

32.768kHz

10XC-IN

11XC-OUT

13X-OUT

15X-IN

2POWER

5CD-POWER

93 27

30 29

X501

X502

16MHz

63

MOTOR DRIVER

65

IC201

TABLE SENSOR

4

LED DRIVER

7

M

3

IC202

S201

UP SWITCH

Q201

1 93 27

30 29

M201

TABLE

MOTOR

STK POWER

HP MUTE

PROTECT

DATA CLOCK

DATA CLOCK WAKE UP

D201

DISC No.

POWER

SECTION

(Page 25)

Q

D

VIDEO

SECTION

(Page 21)

R

DISPLAY SECTION

(Page 26)

+UNREG, 17V

UN–10V

UN+10V

IC931

+10V

1 3

REG

IC932

+12V

1 3

REG

IC951

–7V

2 3

REG

Q905

SWITCH

IC901

+7V

1 3

REG

Q906

INV

IC911

+5V

1 3

REG

IC921

+5V

1 3

REG

Q931

SWITCH

Q903

SWITCH

Q901

SWITCH

Q932 SWITCH

Q904

SWITCH

Q902

SWITCH

Q911

SWITCH

Q921

SWITCH

FAN SWITCH

Q961, 962

IC933

+7V

1 3

REG

Q912

SWITCH

Q914

SWITCH

(LED–7V)

(LED+7V)

(D+5V SW)

FAN901

PL A+10V ST +10V

TC MOTOR+12V

M+7V (UNSW) 7V

A–7.5V

–V BIAS

–7

TC–7V –7V

A+7.5V

+V BIAS

–7

TC–7V –7V

LED 5V

LED 5V D+5V UNSW

EVER +5V

5V AU D+5V

CD D+5V SW CD A+5V SW

FAN

S

POWER SECTION

(Page 25)

16

• R CH : Same as L ch

2424

POWER SECTION

MAIN(1/2)

SECTION

L

(Page 23)

MAIN(1/2)

SECTION

J

(Page 23)

MAIN(2/2)

SECTION

(Page 24)

MAIN(2/2)

SECTION

(Page 24)

Q S

J801

MIX MIC

F-RELAY

L-CH SIG

STK POWER

PROTECT HP MUTE

EVER +5V

D804

MIC AMP

IC850 (1/2)

POWER AMP & VOLUME CONTROL

22

VOLUME

CONTROL

56

VOLUME CONTROL D802, 852

MUTE

SWITCH Q803,804

SWITCH

Q833

IC801

PRE

-VCC

16

-VH

THERMAL

SENSOR

OVERHEAT

Q831,832

Q834 SWITCH

12

DET

MIC VOLUME

RV850

15

OVERLOAD

DET

Q801

R-CH

CONTROL

PROTECT

DC DET

Q433,434

ECHO IC851

ECHO LEVEL

RV851

PROTECT

DET

Q432

PROTECT

BUFFER

Q439

RELAY

DRIVER

Q401-402

PROTECT

DRIVER

Q437

RY401

RELAY

SWITCH

Q431

MIC AMP

IC850 (2/2)

HEADPHONE

MUTE

Q805

R-CH

DBFB

DET

D803

R-CH

MIC-SIG

TM401

DBFB

L

R

FRONT

J803

PHONES

HCD-VR90AV

MAIN(1/2)

H

SECTION

(Page 23)

DISPLAY

T

SECTION

(Page 26)

MAIN(1/2)

SECTION

K

(Page 23)

(Page 24)

16

MAIN(1/2)

SECTION

N

MAIN(2/2)

SECTION

O

• R CH : Same as L ch

• SIGNAL PATH : FM

REAR-L

CENTER

PL-RELAY

12

16

MUTE

SWITCH

Q103,104

14

CCC

SURROUND AMP

IC101

OVERHEAT

DET

Q131,132

7

THERMAL

SENSOR

8

9

OVERLOAD

DET

Q101

VF (–35V)

+VH

-VH

OVERLOAD

DET

Q151

–35V REG

Q903,904

RECT D831

RELAY

DRIVER

Q403, 407

-VH

+UNREG. 12V

UN +10V UN –10V

+VL

-VL

RY402

R-CH

VF

RECT

D833-836

RECT

D841-844

RECT D832

FAN DET

D405-409

F961 F963 F964 F962

POWER

TRANSFORMER

T951

EA,MY,SP,IA MODEL

240V - 220V - 120V

VOLTAGE SELECTOR

VS901

TH MODEL

F951

MY,SP,IA MODEL

R-CH

JW967

HP.SW

FAN.DET

TM402

L

R

CENTER

AC

IN

REAR

SURROUND

P

MAIN(2/2)

SECTION

(Page 24)

2525

HCD-VR90AV

DISPLAY SECTION

MAIN(1/2)

SECTION

(Page 23)

M

RESET

A +7V

A –7V

D671 – D675

X601

12.5MHz

70

72

73

X IN

X OUT

RESET

DISPLAY CONTROL

IC601

LED SEL

LED SCK

LED LATCH

LED DAT

SIRCS

D-SW

JOG A JOG B

80

Q602

Q603

LED5V

7

3 4 5

1

2 8

LED POWER

SWITCH

Q601 SWITCH

REMOTE

CONTROL

RECIEVE

IC602

S691

6

OPEN

ROTARY

ENCODER

LED5V

S702

JOG

LED POWER

14

CLK

15

STB

13

DATA

SWITCH

SERIAL

PARALLEL

CONVERTER

IC604

P1 P2 P3 P4 P5 P7 P8

P9 P10 P11 P12 P13 P14 P15 P16

17 19 20 21 22

10 11

D604 D606 D611

D700

1 2 3 4 5 7 8 9

D614 D616 D618 D621 D623 D625 D627 D632 D635 D637

D605 D607 D612 D613 D615 D617 D619 D620 D624 D626 D631 D636 D638 D641

MAIN(2/2)

SECTION

(Page 24)

POWER

SECTION

(Page 25)

MAIN(1/2)

SECTION

(Page 23)

R

T

I

DATA

CLOCK

WAKE UP

MIC–SIG

SPEANA

4

6

LINE IN

REC IN

REC LEVEL

SPEANA

IC603

REC LEVEL

F06 F05 F04 F02 F01

11 12 13 14 16 17

78 79 22

21 20 19 18 17 16

2

I

C DATA

2

C CLK

I WAKE UP

ALL BAND BPF 4 BPF 3 BPF 2 BPF 1 BPF 0

SEG-1

45 67

23

GR-2 14

42,40

29

VOLUME A VOLUME B

KEY 0

KEY 1

KEY 2

KEY 3

KEY 4

DAILY LED

REC LED LED-EC0

GR-1 GR-15 GR-16

10

11

12

13

14

15

74 75 77

43 28 27

9

ROTARY

ENCODER

KEY

Q608 – Q610

DRIVER

S701

VOLUME

S601-604,606-615,660

S617-620,641-647,672-674

S625-637

S651-659,676-679,681-683

S661-671

LED SWITCH

EVER5V

Q605 – Q607

D601 – D603

16

FLUORESCENT INDICATOR TUBE

FL601

VF

2626

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.)

Waveforms BD SECTION

1

VIDEO SECTION

1

7

For schematic diagrams.

Note:

• All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.

• All resistors are in Ω and 1/ specified.

¢

•

: internal component.

4

W or less unless otherwise

• C : panel designation.

The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified.

• U : B+ Line.

• V : B– Line.

• H : adjustment for repair.

• Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions.

• Voltages are taken with a VOM (Input impedance 10 MΩ). Voltage variations may be noted due to normal production tolerances.

• Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F : FM g : VIDEO/MD E : PB (DECK A) d : PB (DECK B) G : REC (DECK B) J : CD c : digital out I : PHONO o : CD VIDEO n :Y m : CHROMA

• Abbreviation IA : Indonesia model EA : Saudi Arabia model MY : Malaysia model SP : Singapore model TH : Thai model

For printed wiring boards.

Note:

• X : parts extracted from the component side.

®

•

: Through hole.

¢

: internal component.

• b : Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

• Indication of transistor

IC101 %º RFAC

2

APPROX 500mVp-p

IC101 $¡ TE

3

APPROX 200mVp-p

IC101 #ª FE

4

7.5µsec

IC101 @∞ MDP

MAIN (2/5) Section

1

16MHz

IC501 !£ X-OUT

2

32.768kHz

IC501 !¡ XC-OUT

1.3Vp-p

2.6Vp-p

5.2Vp-p

2.5V

5.5Vp-p

2

3

4

5

6

10MHz

IC502 !£ XOUT

H

IC505 &∞ COUT

H

IC505 ^ª YOUT

H

IC401 7 COUT

H

IC401 1 YOUT

H

CN301 2 VOUT

4Vp-p

1Vp-p

2Vp-p

1Vp-p

2Vp-p

1.2

Vp-p

5.8Vp-p

27MHz

IC509 1 XT1

8

4.6Vp-p

44.1kHz

IC509 !ª LRCK

9

4.8Vp-p

2.11MHz

IC509 !¶ BCLK

0

4.8Vp-p

33.8MHz

IC504 8 384FS

!¡

3.8Vp-p

27MHz

IC504 6 27M

!™

2.8Vp-p

33.8MHz

IC504 !™

C

EB

These are omitted

C

Q

These are omitted

EB

FL Section

1

3.4Vp-p

12.5MHz

IC601 &™ X-OUT

2727

HCD-VR90AV

6-3. PRINTED WIRING BOARD BD SECTION

• Refer to page 19 for Circuit Boards Location.

K

(Page 30)

16

2828

HCD-VR90AV

6-4. SCHEMATIC DIAGRAM BD SECTION

• Refer to page 27 for Waveforms.

K

(Page 31)

16

2929