Sony HCD-VM330AV Service manual

Amplifier section

Front speaker:

Continuous RMS power output

75 + 75 watts (8 ohms at 1 kHz, 10% THD)

Total harmonic distortion less than 0.09%

(8 ohms at 1 kHz, 40 watts)

Center speaker:

Continuous RMS power output

25 watts (8 ohms at 1 kHz, 10% THD)

Rear speaker:

Continuous RMS power output

25 + 25 watts (8 ohms at 1 kHz,

10% THD) Inputs VIDEO/MD IN (phono jacks):

voltage 250 mV/450 mV,

impedance 47 kilohms

5.1CH: FRONT (phono jacks) voltage 450 mV,

impedance 47 kilohms REAR (phono jacks) voltage 450 mV,

impedance 47 kilohms CENTER (phono jack) voltage 450 mV,

impedance 47 kilohms SUB WOOFER (phono jack):

voltage 450 mV,

impedance 47 kilohms

Outputs PHONES (stereo phone jack):

accepts headphones of 8 ohms or more

FRONT SPEAKER: accepts impedance of 8 to

16 ohms

SURROUND SPEAKER REAR:

accepts impedance of 8 to 16 ohms

SURROUND SPEAKER CENTER:

accepts impedance of 8 ohms

SUB WOOFER: voltage 1 V,

impedance 1 kilohm

VIDEO OUT (phono jack):

max. output level 1 Vp-p, unbalanced, Sync negative, load impedance 75 ohms

S-VIDEO OUT (4-pin/mini-DIN jack)

Y: 1 Vp-p, unbalanced, Sync negative, C: 0.286 Vp-p, load impedance 75 ohms

VIDEO CD/CD player section

System Compact disc and digital

audio system

Laser Semiconductor laser

(λ = 795 nm) Emission duration: continuous

Frequency response 2 Hz – 20 kHz (±0.5 dB) Wavelength 775 – 815 nm Signal-to-noise ratio More than 90 dB Dynamic range More than 90 dB Video color system format NTSC, PAL OPTICAL OUT (CD) (Square optical connector jack, rear panel) Wavelength 660 nm Output Level –18 dBm

Tape player section

Recording system 4-track 2-channel stereo Frequency response 40 – 13,000 Hz (±3 dB),

using Sony TYPE I cassette

HCD-VM330AV

SERVICE MANUAL

Ver 1.0 2001.06

HCD-VM330AV is the Amplifier, Video CD/CD player , Tape Deck and Tuner section in MHC-VM330AV.

This stereo system is equipped with the Dolby* Pro Logic Surround decoder. * Manufactured under license from Dolby

CD Section

TAPE Section

E Model

Model Name Using Similar Mechanism NEW CD Mechanism Type CDM64-30ABD61A Base Unit Name BU-30ABD61A Optical Pick-up Name OP Assy (A-MAX. 3) Model Name Using Similar Mechanism HCD-MG110 T ape Transport Mechanism Type CM8L6Z511A

9-873-189-01 Sony Corporation

2001F0500-1 Home Audio Company C 2001.6 Shinagawa Tec Service Manual Production Group

SPECIFICATIONS

COMPACT DISC DECK RECEIVER

– Continued on next page –

HCD-VM330AV

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range 87.5 – 108.0 MHz Antenna FM lead antenna Antenna terminals 75 ohms unbalanced Intermediate frequency 10.7 MHz

AM tuner section

Tuning range 530 – 1,710 kHz

Antenna AM loop antenna Antenna terminals External antenna terminal Intermediate frequency 450 kHz

(with the interval set at 10 kHz) 531 – 1,602 kHz (with the interval set at 9 kHz)

General

Power requirements 110 – 120 V or 220 –

Power consumption 200 watts Dimensions (w/h/d) incl. projecting parts and controls

Mass: Approx. 12.1 kg

Design and specifications are subject to change without notice.

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.

SAFETY-RELATED COMPONENT WARNING!!

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.

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 pick-up 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 waveforms is output three times.

3

HCD-VM330AV

SECTION 1

SERVICING NOTES

CD-TEXT TEST DISC

This unit is able to display the test data (character information) written in the CD on its fluorescent indicator tube. The CD-TEXT TEST DISC (TGCS-313:4-989-366-01) is used for checking the display. To check, perform the following procedure.

Checking Method:

1. Press the I/1 button to turn the power on, set the disc to the disc table with the “test disc” label facing up, and chuck the disc.

2. Press the [CD] button to set CD function, and press the n N button to playback the disc.

3. The following will be displayed on the liquid crystal display.

Display : 1KHZ/0DB/L R

4. Pressing the [-- ] or [ +] button, select the track. The text data of each track will be displayed. For details of the displayed contents for each track, refer to “Table 1: CD-TEXT TEST DISC TEXT Data Contents”.

Restrictions in CD-TEXT Display

In this unit, some special characters will not be displayed properly. These will be displayed as a space or a character resembling it.

Table 1: CD-TEXT TEST DISC TEXT Data Contents

TRACK

No.

1 1kHz/0dB/L&R 2 20Hz/0dB/L&R 3 40Hz/0dB/L&R 4 100Hz/0dB/L&R 5 200Hz/0dB/L&R 6 500Hz/0dB/L&R 7 1kHz/0dB/L&R 8 5kHz/0dB/L&R

9 7kHz/0dB/L&R 10 10kHz/0dB/L&R 11 16kHz/0dB/L&R 12 18kHz/0dB/L&R 13 20kHz/0dB/L&R 14 1kHz/0dB/L&R 15 1kHz/–1dB/L&R 16 1kHz/–3dB/L&R 17 1kHz/–6dB/L&R 18 1kHz/–10dB/L&R 19 1kHz/–20dB/L&R 20 1kHz/–60dB/L&R

.>

(TRACKS No. 1 to 20:Normal Characters)

Displayed Contents

CLEANING OBJECTIVE LENS OF OPTICAL PICK-UP

• In cleaning the objective lens of optical pick-up, be sure the following below.

2

Remove the magnet assy.

optical pick-up

bracket (top 60) hole

A

3

Put a cotton bud into the hole on the bracket (top 60) and clean the OP lens.

Note 1. In cleaning the lens, do not apply an excessive force.

As the optical pick-up is vulnerable, application of excessive force could damage the lens holder.

Note 2. In cleaning, do not use a cleaner other than exclusive cleaning

liquid (KK-91 or isopropyl alcohol).

Note 3. Wipe the objecti ve lens spirally from center toward outside. (See

Figure A)

1

Open the torsion holder (magnet) in direction of arrow

A

.

(Figure A)

Note: Track No. 21 to 99 are not displayed.

4

SECTION 2

GENERAL

Parts Identification

The items are arranged in alphabetical order. Refer to the pages indicated in parentheses ( ) for details.

Main unit

HCD-VM330AV

This section is extracted from instruction manual.

1

es

ea e; wl wk wj wh

wg wf wd ws wa

5.1CH/VIDEO (MD) 5 (34) AUDIO IN L jack wk (35) AUDIO IN R jack wj (35) CD 5 (13, 16, 27) CD SYNCHRO wh (27, 28) CLEAR w; (17, 18, 40) Deck A es (26) Deck B 0 (26) DIRECTION ea (26) DISC ACCESS ql (12, 13, 16,

17)

Display window 4 DISPLAY wd (11, 19, 25, 40) ENTER qk (11, 17, 18, 25, 28, 29) FRONT qd (31) GAME e; (32, 35 ) KEYBOARD INPUT jack ws

(33)

LINK qg (31)

234

5

67 8 9

w; ql

MENU ea (18, 24) PHONES jack wa PLAY MODE wf (17, 28) PRESET EQ 7 (30) PRO LOGIC qs (10, 31) PUSH OPEN (Front cover) qj

(12 )

REAR qf (31) REC PAUSE/START wh (27, 28) REPEAT wg (14) STEREO/MONO wg (25) SURROUND qa (31) SURROUND MODE 8 (31) TAPE A/B 5 (26) TIMER SELECT 3 (29, 33) TIMER SET 3 (11, 29, 32) TUNER/BAND 5 (24) VIDEO IN jack wl (35) VOLUME control qh

0 qa

qs

qd

qf qg qh

qj qk

BUTTON DESCRIPTIONS

Z (deck A) 1 =/1 (power) 2 m (rewind) 6 n N (play) 6 X PAUSE 6 M (fast forward) 6 x (stop) 6 — . (go back) 6 > + (go forward) 6 Z (deck B) 9

4

5

HCD-VM330AV

Remote Control

1234

ws

wa w;

ql qk

qj

qh

5

6

7

8 9

0 qa

qs qd

qf

qg

ek ej

eh eg ef

ed

es

ea

e;

wd wf

wg

wh

wj wk

wl

Setting the time

1

Turn on the system.

2

Press TIMER SET (or CLOCK/TIMER SET on the remote).

When you set the clock for the first time, go to step 5.

3

Press — . or > + (or . or > on the remote) repeatedly to select CLOCK SET.

4

Press ENTER.

5

Press — . or > + (or . or > on the remote) repeatedly to set the hour.

6

Press ENTER.

7

Press — . or > + (or . or > on the remote) repeatedly to set the minute.

8

Press ENTER.

Tip

If you made a mistake or want to change the time, start over from step 1.

Note

The clock settings are canceled when you disconnect the power cord or if a power failure occurs.

5.1CH 0 (36) CD ql (13, 16, 27) CENTER +/— eg (10) CLOCK/TIMER SELECT 2

(29, 33)

CLOCK/TIMER SET 3 (11, 29,

32)

DBFB qg (30) DISPLAY qf (11, 19, 25) ENTER wg (11, 15, 17, 18, 25,

28, 29)

GAME qa (32, 35) GROOVE wk (30) NEXT wj (14, 15, 22) Number buttons 7 (14, 16) ON SCREEN ek (20) PICTURE EFFECT ej (23) PLAY MODE 4 (17, 28) PRESET EQ qj (30) PREV wj (14, 15, 22) PRO LOGIC eh (10, 31)

REAR +/— wh (10) REPEAT 6 (14) RETURN O wf (15) SCROLL qd (19) SELECT ed (15) SLEEP ws (32) SPECIAL MENU wd (21, 22) SURROUND qh (31) TAPE A/B w; (26) TEST TONE ef (10) TUNER BAND qk (24) TV @/1 (power) 8 (9) TV CH +/— 9 (9) TV/VIDEO 1 (9) TV VOL +/— wa (9) VIDEO (MD) qs (34) VOL — e; VOL + es

BUTTON DESCRIPTIONS

@/1 (power) 5 N (play) ed X (pause) ed x (stop) ed . (go back) wj m (rewind) wj M (fast forward) wj > (go forward) wj

TDISC/DISCt wl ea

6

• This set can be disassembled in the order shown below.

3-1. DISASSEMBLY FLOW

Note 1: The process described in can be performed in any order. Note 2: Without completing the process described in , the next process can not be performed. Note 3: Illustration of disassembly is omitted.

SET

3-2. UPPER COVER

(Page 8)

HCD-VM330AV

SECTION 3

DISASSEMBLY

3-3. FRONT BLOCK ASSY

(Page 8)

3-4. VIDEO BOARD

(Page 9)

3-5. MAIN BOARD

(Page 9)

3-6. BACK PANEL,

DC FAN (M391)

(Page 10)

3-7. MAIN AMP BOARD,

POWER BOARD,

VOL SEL BOARD

(Page 10)

3-8. MIDDLE (F) ASSY, BRACKET (MIDDLE-R),

POWER BRACKET

(Page 11)

3-3. FRONT BLOCK ASSY

(Page 8)

3-12. CASSETTE LID ASSY (A)/(B)

(Page 13)

3-13. MECH DECK (TAPE)

(Page 13)

3-9. CD MECHANISM DECK

(CDM64-30ABD61A)

(Page 11)

3-10. BASE UNIT

(BU-30ABD61A)

(Page 12)

3-11. BU HOLDER ASSY

(Page 12)

7

HCD-VM330AV

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

3-2. UPPER COVER

3

upper cover

1

three screws (BVTP3

×

8)

2

five screws (BVTP3

2

two screws (BVTP3

1

three screws (BVTP3

×

8)

×

8)

×

8)

3-3. FRONT BLOCK ASSY

2

three connectors (CN310, 503, 803)

3

screw (BVTP3 × 8)

8

front block assy

6

screw (KTP3 × 8)

1

wire (flat type) (11 core) (CN312)

1

wire (flat type) (17 core) (CN301)

4

two herness

7

two bosses

1

wire (flat type) (10 core) (CN311)

7

two bosses

2

connector (CN315)

6

screw (KTP3 × 8)

5

three screws (BVTP3 × 8)

8

3-4. VIDEO BOARD

)

3

two screws (BVTP3

4

MPEG bracket

1

wire (flat type) (13 core) (CN502)

×

10)

6

VIDEO board

1

wire (flat type) (25 core) (CN501)

HCD-VM330AV

2

screw (BVTP3 × 8

5

3-5. MAIN BOARD

two screws (BVTP3

×

10)

3

two screws (BVTP3

3

×

8)

3

1

screw (BVTP3

screw (BVTP3 × 8)

3

three screws (BVTP3

wire (flat type) (18 core) (CN309)

×

8)

×

8)

2

connectors (CN903)

2

connector (CN313)

2

connectors (CN317)

2

connectors (CN305)

2

connectors (CN304)

5

MAIN board

4

screw (BVTP3

×

8)

9

HCD-VM330AV

s

3-6. BACK PANEL, DC FAN (M391)

5

back panel

4

DC fan (M391)

3

four screws (BVTP3

2

×

10)

1

two screws (BVTP3

×

10)

1

two screws (BVTP3

×

10)

1

thirteen screw (BVTP3 × 10)

3-7. MAIN AMP BOARD, POWER BOARD, VOL SEL BOARD

2

four screws (BVTP3

1

connector (CN502)

4

three screws

×

8)

2

two screws (BVTP3

×

8)

5

center bracket

(BVTP3

×

8)

3

MAIN AMP board

6

two screws (BVTP4

6

two screws (BVTP4

7

8

POWER board

×

8)

VOL SEL board

8)

10

3-8. MIDDLE (F) ASSY, BRACKET (MIDDLE-R), POWER BRACKET

)

7

bracket (middle-R)

5

three screws (BVTP3 × 8)

3

screw (BVTP3 × 8)

2

two screws (BVTP3 × 8)

1

connector (CN901)

6

two screws (BVTP3 × 8)

HCD-VM330AV

9

three screws (BVTP3 × 8)

0

two screws (BVTP3 × 8)

4

middle (F) assy

3-9. CD MECHANISM DECK

(CDM64-30ABD61A)

1

screw (2.6 × 8)

2

table (60)

8

3

screw (BVTP3 × 8)

5

CD mechanism deck (CDM64-30ABD61A)

screw (BVTP3 × 8)

qa

power bracket

lower chassis

4

four screws (BVTP3

4

two screws (BVTP3

3

screw

×

(PSW3

4

×

8)

four screws

×

(BVTP3

6)

8)

×

8

11

HCD-VM330AV

)

3-10. BASE UNIT

(BU-30ABD61A)

1

three screws (BVTP3

3

base unit (BU-30ABD61A

2

bracket (top 60)

×

8)

3-11. BU HOLDER ASSY

4

BU holder assy

1

tension spring (F1)

2

tension spring (F-2)

3

two screws (PTP2.6

×

8

12

3

two screws (PTP2.6

×

8)

3-12. CASSETTE LID ASSY (A) / (B)

d

)

1

Open the cassette lid assy (A)/(B).

2

two claws

HCD-VM330AV

3-13. MECH DECK (TAPE)

4

cassette holder assy (A)

0

two screws (BVTP2.6)

3

cassette lid assy (A)

3

4

two claws

1

three screws (BVTP3 × 10)

qs

mech deck (TAPE)

qa

MD bracket

2

two screws (BVTP3 × 10

5

cassette li assy (B)

5

cassette holder assy (B)

7

shield plate (MD)

9

TC board

8

screw (BVTP2.6)

6

two screws (BVTP2.6)

13

HCD-VM330AV

SECTION 4

TEST MODE

[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. Turn the power ON or set to the DEMO mode.

2. Press three buttons of x , [CLEAR], and [DISPLAY] simul-

taneously.

3. The set is reset, and becomes DEMO mode.

[Change-over the AM Tuning Inter val]

• The AM tuning interval can be changed over 9 kHz or 10 kHz.

Procedure:

1. Press the I/1 button to turn the power ON.

2. Select the function “TUNER”, and press the [TUNER/BAND]

button to select the BAND “AM”.

3. Press the I/1 button to turn the power OFF.

4. Press the [ENTER] and I/1 buttons simultaneously to the tun-

ing interval is changed over.

[CD Delivery Mode and RAM Initialize]

• This mode moves the optical pick-up to the position durable

to vibration, and initializes the RAM. Use this mode when returning the set to the customer after repair. Procedure:

1. Press the I/1 button to turn the power ON.

2. Press three buttons of [ENTER], M , and [CLEAR] simul-

taneously.

3. The set is turn the power off and initializes the RAM auto-

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

[CD Service Mode]

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

Procedure:

1. Press the I/1 button to turn the power ON.

2. Select the function “CD”.

3. Press three buttons of [ENTER], M , and [REPEAT] simul-

taneously.

4. Set to the Sled Servo mode.

5. With the CD in stop status, press the M button to move the

optical pick-up to outside track and display “SLED OUT”, or press the m button to move the optical pick-up to inside track and display “SLED IN”.

6. To exit from this mode, perform as follows.

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

2) Press three buttons of x , [CLEAR], and [DISPLAY] simultaneously. (cold reset)

Notes: • Always move the optical 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.

[LED and Fluorescent Indicator Tube All Lit, Key Check Mode]

Procedure:

1. Press three buttons of x , [MENU], and [DISPLAY] simulta- neously.

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

3. Press the [MENU] button and go to the version display mode. Press the m button and go to the key and jog test mode.

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

– Version display mode –

Press the – . button to display the version .

– Key and jog test mode –

In the key check mode, the fluorescent indicator tube displays “K 0 J0 V0”. Each time a button is pressed, “K” value increases. However , once a button is pressed, it is no longer taken into account. “J” value increases like 1, 2, 3 ... if turn the [DISC ACCESS] dial clockwise, or it decreases like 0, 9, 8 ... if turn the

[DISC ACCESS] dial counterclockwise.

“V” value increases like 1, 2, 3 ... if turn the [VOLUME] knob clockwise, or it decreases like 0, 9, 8 ... if turn the [VOLUME] knob counterclockwise.

14

SECTION 5

MECHANICAL ADJUSTMENTS

HCD-VM330AV

SECTION 6

ELECTRICAL ADJUSTMENTS

• TAPE MECHANISM DECK SECTION

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

FWD back tension

REV

REV back tension

FF/REW

FWD tension

REV tension

Torque meter

CQ-102C

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

Meter reading

2.94 mN • m to 7.84 mN • m 31 to 71 g • cm

(0.43 – 0.98 oz • inch)

0.14 mN • m to 0.59 mN • m

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

2.94 mN • m to 7.84 mN • m 31 to 71 g • cm

(0.43 – 0.98 oz • inch)

0.14 mN • m to 0.59 mN • m

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

6.86 mN • m to 17.64 mN • m 71 to 143 g • cm

(0.98 – 1.99 oz • inch)

more than 0.98 N • m

100 g or more

(3.53 oz or more)

more than 0.98 N • m

100 g or more

(3.53 oz or more)

DECK SECTION

Precaution

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 adjust.

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.

8. Set to the DOLBY NR OFF.

• Test Tape

Tape Signal Used for

P-4-A100 10 kHz, – 10 dB Azimuth Adjustment

WS-48A 3 kHz, 0 dB Tape Speed Check

0 dB = 0.775 V

15

HCD-VM330AV

)

Record/Playback Head Azimuth Adjustment

DECK A DECK B

Note: Perform this adjustments for both decks

Procedure:

1. Mode: Playback (FWD)

test tape P-4-A100 (10 kHz, – 10 dB)

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 1dB of peak.

L-CH peak

R-CH

Screw position

peak

3. Mode: Playback

test tape P-4-A100 (10 kHz, – 10 dB)

L-CH

set

R-CH

MAIN AMP board FRONT SPEAKER terminal (J501) L-CH, R-CH

level meter

set

within 1dB

Output level

L-CH peak

MAIN AMP board FRONT SPEAKER terminal (J501 L-CH

R-CH

+

–

R-CH peak

oscilloscope

V

within 1dB

Screw position

H

Adjustment Location:Playback Head (Deck A).

Record/Playback/Erase Head (Deck B).

forward

reverse

Tape Speed Check DECK B

Mode: Playback

test tape WS-48A (3 kHz, 0 dB)

set

MAIN AMP board FRONT SPEAKER terminal (J501) L-CH, R-CH

frequency counter

+

–

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

2. Press the nN button on the deck B.

3. Confirm that the frequency counter reads 3,000 ± 60 Hz.

Sample value of Wow and Flutter: 0.3% or less W.RMS (JIS)

(WS-48A)

waveform of oscilloscope

in phase 45°90°135°180

good

°

wrong

4. Repeat step 1 to 3 in playback (REV) mode.

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

16

HCD-VM330AV

r

)

CD SECTION

Note :

1. CD Block is basically designed 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.

S-Curve Check

Oscilloscope

BD board

TP(FEO) TP(DVC)

Procedure :

1. Connect an oscilloscope to TP (FEO) and TP (DVC).

2. Connect between TP (FEI) and TP (VC) by lead wire.

3. Turn Power switch on.

4. Load the disc (YEDS-18) and actuate the focus search. (In consequence of open and close the disc tray, actuate the focus search)

5. Confirm that the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 4 ±1 Vp-p.

S-curve waveform

symmetry

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 : 1.1 ± 0.3Vp-p

E-F Balance (1 Track jump) Check

oscilloscope

BD board

TP (TEO) TP (DVC)

+ –

Procedure:

1. Connect an oscilloscope to TP (TEO) and TP (DVC).

2. Turn Power switch on.

3. Load the disc (YEDS-18) and playback the number five track.

4. Press the X button. (Becomes the 1track jump mode.)

5. Confir m that the level B and A (DC voltage) on the oscilloscope waveform.

1 track jump waveform

Center of waveform

A

within 4 ±1Vp-p

B

7. 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.

RF Level Check

oscilloscope

BD board

TP (RFAC) or TP(RFDC) TP(DVC)

Procedure :

1. Connect an oscilloscope to TP (RFAC) and TP (DVC).

2. Turn Power switch on.

3. Load the disc (YEDS-18) and playback.

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

5. Measure the RFDC in the same way.

B

0V

level=1.3 ±0.6Vp-p

Specification level: x 100=less than ±22%

A B

Symmetry

A (DC voltage

6. After check, remove the lead wire connected in step 1.

RF PLL Free-run Frequency Check

Procedure :

1. Connect a frequency counter to TP (XPCK) and GND.

BD board

TP (XPCK)

frequency counte

+

–

2. Turn Power switch on.

3. Load the disc (YEDS-18) and playback the number five track.

4. Confirm that the reading on frequency counter is 4.3218MHz.

17

HCD-VM330AV

r

Checking Location :

[ BD BOARD ] — SIDE B —

R120

TP (FEI)

TP (VC)

TP (DVC)

TP (TEO)

TP (RFDC)

IC103

(RFAC)

TP (FEO)

TP

IC101

TP (XPCK)

VIDEO SECTION

Video Frequency Adjustment

Connection:

frequency counte

VMP board

TP (27MHz) TP (GND)

Procedure:

1. Connect a frequency counter to TP (27MHz) and TP (GND).

2. Turn power switch on.

3. Turn the [FUNCTION] knob of amplifier unit (TA-SV7AV) to set the CD function.

4. Adjust CT503 on the VMP board so that the frequency counter reading 27.0 MHz ± 80 Hz at stop status.

Adjustment Location:

[VMP BOARD] (SIDE A)

J301

CN501

CN502

TP (27MHz)

IC507

TP (GND)

CT503 Video Frequency Adjustment

18

SENSOR SECTION

p

Disc Sensor Level Adjustment

Procedure:

1. Connect an oscilloscope to TP (DISC SENSOR) and TP (GND) on the MAIN board.

2. Turn the power on.

3. In the no disc status, adjust RV301 on the MAIN board so that the waveform of oscilloscope becomes as below. And check the peak to peak level is more than 4 Vp-p.

Waveform when no disc

,

turn the RV301

more than 4 Vp-p

HCD-VM330AV

NG

OK

4. Insert a disc into the disc slot No. 58.

5. Check that the waveform of oscilloscope as below . And adjust RV301 on the MAIN board so that the peak to peak level becomes less than 0.5 Vp-p besides becomes as little as possible.

Waveform when disc in

less than 0.5 Vp-

6. Check that the waveform and peak to peak level satisfy specification of step 4. If it is wrong, repeat from step 4 until satisfy.

Adjustment Location:

[MAIN BOARD] (CONDUCTOR SIDE)

RV301

Disc Sensor Level

Adjustment

TP (GND)

TP (DISC SENSOR)

19

HCD-VM330AV

MEMO

20

SECTION 7

DIAGRAMS

7-1. BLOCK DIAGRAM – CD SERVO Section –

HCD-VM330AV

DETECTOR

A

B

F

E

OPTICAL PICK-UP

BLOCK

(A-MAX. 3)

LASER DIODE

PD

I-V AMP

LD

M101

(SPINDLE)

M102

(SLED)

M

CD +5V

A

6

B

7

C

8

D

9

F

11

F I-V AMP

E

10

E I-V AMP

AUTOMATIC

POWER

CONTROL

Q101

FOCUS/TRACKING COIL DRIVE,

VO4+

5

VO4–

10

VO3+

1

VO3–

2

1

SPINDLE/SLED MOTOR DRIVE

IC102

MOTOR

DRIVE

MOTOR

DRIVE

FILTER

RF AMP,

FOCUS/TRACKING ERROR AMP

RF

SUMMING

AMP

FOCUS

ERROR AMP

RF DC

AMP

TRACKING

ERROR AMP

LD

IN4R

IN3+

IN3–

APC LD

AMP

26

24

27

AC

SUM

RFDCO

RFDCI

SW

IC103

EQ IN

4

FE

16

FEI

17

28

29

TE

18

12

PD

2

RFAC

3

VCA

DIGITAL SERVO

PROCESSOR

IC101 (2/2)

EQ

40 41 39 43

RFAC

FE

TE

SE

A/D

CONVERTER

15

DIGITAL SIGNAL PROCESSOR

50

49

48

RFDC

IC101 (1/2)

RFAC

ASYMMETRY

CORRECTOR

ASYI

ASYO

DIGITAL

CLV

PROCESSOR

MDP

25 76 77

82

28 26 24

53 55

FILO

TO SERVO AUTO

SEQUENCER

DATA

95 5 97 1 18 84 83 10

LD ON

DSP DATA

PWM1 PWM2 PWM3

FILI

PCO

CLTV

DIGITAL PLL

CPU INTERFACE

SENS

CLOK

XLAT

DSP CLK

DSP LATCH

SENSE CLK

2

125254

XPCK

SCOR

SENSE

EFM

DEMODULATOR

INTERNAL BUS

SUBCODE

PROCESSOR

SQCK

SQSO

EXCK

SBSO

79 801574 6 5 10 111368 3

SCOR

SUBQ CLK

SUBQ DATA

WFCK

XUGF

GFS

EMPH

VIDEO CD CONTROLLER

IC502 (1/2)

83C-XRST

93

T-SENS1

18

T-SENS2

91

T-SENS3

LOAD IN SW 6

LOAD IN

32K

RAM

ERROR

CORRECTOR

TABLE

SENSOR

IC11 – 13

16 69

C4M

CLOCK

GENERATOR

DIGITAL

INTERFACE

MUTING

DSP MUTING

XRESET

12

S842

(LOAD)

XTSL

D/A

DIGITAL

DEVICE RESET

OUT

XTAO

XTAI

PCMD

BCK LRCK C2PO

WDCK

DOUT

MD2

XRST

CTRL1

72

71

66 67 65 14 17

64

63

2

11

77

OSC

BUFFER

IC106

DATA

BCK LRCK C2PO

CD +3.3V

OPTICAL

TRANSCEIVER

IC361

MCLK

33.8MHz

DATA, BCK,

LRCK, C2PO

OPTICAL

OUT (CD)

A

B

(Page 22)

2-AXIS

DEVICE

(TRACKING)

(FOCUS)

LIMIT

SWITCH

92

2

100

LOAD OUT

DISC IN

DETECT SENSOR

D841, Q841

LOADING

MOTOR CONTROL

Q881 – 884

TABLE

MOTOR CONTROL

Q885 – 888

2 3

17 16

LOADING/TABLE

MOTOR DRIVE

FN1 RN1

FIN2 RIN2

IC881

MOTOR

DRIVE

MOTOR

DRIVE

OUT1 + OUT1 –

OUT2 + OUT2 –

8 9

11

10

M

M51

(LOADING)

M52

(TABLE)

• SIGNAL PATH

: CD PLAY (ANALOG OUT)

SFDR

29

SRDR

VO2+

55

VO2–

56

VO1+

47

VO1–

52

COIL

DRIVE

COIL

DRIVE

STBY

8

IN2+

IN2–

IN1+

IN1–

32

31

35

34

30

TFDR

31

TRDR

32

FFDR

33

FRDR

34

PWM GENERATOR

FOCUS/TRACKING/SLED

FOCUS/

TRACKING/SLED

SERVO DSP

SSTP

26

MIRR, DFCT, FOK DETECTOR

SERVO

INTERFACE

SERVO AUTO

SEQUENCER

TO CPU INTERFACE

FOK MIRR DFCT

COUT

SCLK

22 20 21

19

8

SYSTEM CONTROLLER

LOAD OUT SW 7

IC801 (1/5)

D-SENS

LOAD NEG 3 LOAD POS

TABLE POS 5 TABLE NEG

: CD PLAY (DIGITAL OUT)

2121

HCD-VM330AV

7-2. BLOCK DIAGRAM – AUDIO/VIDEO Section –

A

(Page 21)

MCLK 33.8MHz

MPEG VIDEO/AUDIO DECODER,

VIDEO SIGNAL PROCESSOR

IC505

MPEG AUDIO

DECODER

AUDIO

INTERFACE

CIRCUIT

DA-DATA

DA-BCK

DA-LRCK

DIGITAL FILTER, D/A CONVERTER

IC509

110 111 108

DATA

18 17 19

BCK LRCK

INPUT

INTERFACE

CIRCUIT

DIGITAL

FILTER,

NOISE SHAPER CIRCUIT

D/A

CONVERTER

LOW-PASS

FILER

VOUTL

VOUTR

R-CH

CD L-CH

D

(Page 24)

14

LOW-PASS

FILER IC101

11

B

(Page 21)

16 – 19, 22 – 26

D-RAM

IC507

DATA, BCK, LRCK, C2PO

A0 – A8

UCAS

DATA

BCK

LRCK

C2PO

LCAS

DA-XCLK

86

CD-DATA LEVEL SHIFT IC501

D0 – D15

DQ1 – DQ16

RAS

WE

14 132928

4

CD-BCK

3

CD-LRCK

5

CD-C2PO

6

ADDRESS BUS

DATA BUS

PROGRAM ROM

CD-ROM

INTERFACE

CIRCUIT

MA0 – MA10

58 – 56, 54, 52 – 50, 48, 46 – 44 10 – 15, 17, 19, 21, 23 – 29

A0 – A10

12 – 5, 27, 26, 23

A0 – A10

IC510

13 – 15, 17 – 212 – 5, 7 – 10, 31 – 34, 36 – 39

MPEG

SYSTEM

DECODER

D-RAM/ROM INTERFACE

MD0 – MD15

D0 – D7

O0 – O7

MPEG

VIDEO

DECODER

D0 – D15

D8 – D14

25, 4, 28, 29, 3, 2, 30

A11 – A17

CE

22

VIDEO

PROCESS

CIRCUIT

RAS0

MWE

MCE

37

38 42 40 60

CAS

CPU INTERFACE

HRDY

RESET

113

114 121

VSYNC/CSYNC

HSEL

HD-OUT

HINT

112

Y-OUT

C-OUT

VCK-IN

HSYNC

HD-IN

119

69

75

106

93

101

HCK

117

BUFFER

Q501

DATA

CLK

BUFFER

Q502

OSC

BUFFER

IC504

384FSO

20

MCKO

4

CT503 VIDEO

FREQUENCY

TIMING CONTROL/

CLOCK GENERATOR

XT2

B.P.F.

X503

27MHz

XT1

MODE

CONTROL

• R-ch is omitted due to same as L-ch.

ML

MC

MD

9 724 1

8

RSTB

10

• SIGNAL PATH

: CD PLAY (AUDIO)

: CD PLAY (VIDEO)

2

Y IN

Y/C DECODER

IC304

Y OUT1 Y OUT2

15 14

2

4

3

1

J301

S VIDEO OUT

Y AMP

IC303

10

VIN

CONT

C AMP

IC302

1

VOUT

5

C

(Page 26)

IIC-DATA, IIC-CLK

X501

10MHz

IIC-DATA

IIC-CLK

13

15

30

29

XOUT

XIN

I2C_DATA

I2C_CLK

85

86

CL680 HINT

CL680 HRDY

CL680 RESET

VIDEO CD CONTROLLER

36

8720

DATAI

CL680 SEL

IC502 (2/2)

3735

CLK1

DATAO

2222

21

H. SYNC IN

45

VSYNC

88

DF LATCH

66

DAC RESET

3

RESOLUTION

CHOMA

LEVEL

BGP

V. MUTING

B.P.F.

22

65

1

VIN

TINT5BGP

8

4

Q301

VOUT

6

7

C IN

MUTE A8MUTE B

1

C OUT

MIX OUT1 MIX OUT2

9

12 11

VIDEO OUT

E

(Page 24)

7-3. BLOCK DIAGRAM – TUNER/TAPE DECK Section –

HCD-VM330AV

ANTENNA

HP101

(PLAY)

FM 75Ω

L-CH

R-CH

L-CH

R-CH

AM

R-CH

TUNER PACK

FM ANT

ANT GND

AM ANT

ANT GND

L-CH

R-CH

DI

DO

TU-CLK

TU-CE

TUNED

13

R-CH R-CH

R-CH

DI

DO

CLK

CE

TUNED

A IN-L

24

B IN-L

23

REC/PB SWITCHING

IC402

A/B SW

19

PB AMP

IC401 (1/2)

PB

AMP

R-CH

TUNER

L-CH

5.1CH

INPUT SELECT

SWITCH

IC306

1 2

PB-L

20

MIX

OUT

6

+

AMS DET

Q404, 405

MUTING

Q102

MUTING

Q101

R-CHR-CH

4 3

5 13

R-CHR-CH

TAPE

L-CH

F

G

H

(Page 24)

HRPE101

(REC/PLAY/ERASE)

R-CH

M1

(CAPSTAN)

BIAS OSC

T401

SENSOR B+

MM

T403

2

BIAS OSC

Q401

C429, R429

BIAS

TRAP

REC BIAS

SWITCH

Q402, 403

CAPSTAN

MOTOR DRIVE

Q381, 382

MOTOR

+12V

4

AU +9V

58 MO-ON

54

PB/REC

53

PB-A/B

A-PLAY

61

(DECK A PLAY)

16

67

AMS

B-PLAY

56

(DECK B PLAY)

REC OUT-L

REC AMP

IC401 (2/2)

REC AMP

(DECK A HALF)

TAPE MECHANISM

DECK BLOCK

(1/2)

REC IN-L

66

14

R-CH

A-HALF

MUTING

Q112

50

REC-MUTE

(DECK B HALF)

(DECK B REC)

68

PB-MUTE

B-HALF

90

69

TAPE

(DECK A REC)

70

DVD

SYSTEM CONTROLLER

TAPE MECHANISM

DECK BLOCK

(2/2)

ROTATION

DETECT SENSOR

(DECK A)

97

A-SHUT

IC801 (2/5)

ROTATION

DETECT SENSOR

(DECK B)

89

B-SHUT

TRIGGER PLUNGER

(DECK A)

TRIGGER

PLUNGER DRIVE

(DECK A)

Q383, 384

59

A-TRIG

TRIGGER PLUNGER

(DECK B)

TRIGGER

PLUNGER DRIVE

(DECK B)

Q385, 386

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH

: TUNER

: TAPE PLAY (DECK A)

: TAPE PLAY (DECK B)

60

B-TRIG

DI

DO

CLK

78

80

79

TU-DI

TU-DO

TU-CLK

: REC

: 5.1CH INPUT

CE

77

TUNED

76

TU-CE

TU-TUNED

REC

L-CH

J

(Page 24)

2323

HCD-VM330AV

7-4. BLOCK DIAGRAM – SURROUND Section –

LOW-PASS

FILTER

IC304 (1/2)

VIDEO (MD) IN

5.1CH INPUT

AUDIO

FRONT

REAR

WOOFER

(Page 26)

(Page 23)

(Page 22)

(Page 23)

CENTER

SUB

VIDEO

(Page 22)

L

R

J701 (1/2)

L

R

L

R

L

R

J701 (2/2)

J302

J301

K

J

D

F

H

G

E

SPE ANA

REC L-CH

CD L-CH

TUNER L-CH

TAPE L-CH

R-CH

5.1CH

R-CH

VIDEO OUT

3

5

7

1

9

FRONT

REAR

CENTER

WOOFER

B1

C1

D1

A1

E1

3

1

INPUT SELECT

IC302 (1/2)

INPUT SELECT

VIDEO SELECT

VIN2

VIN1

+

R-CH

LINE

OUT

LOGIC

DATA

CLK

1514

DATA

CLK

DATA CLK

SWITCH

VIDEO AMP

IC309

SW1

2

DOLBY PRO LOGIC

SURROUND PROCESSOR

IC301

AUTO-BALANCE

L–R

SW

OUT

INPUT

DS2L

OUT

WOOFER

FRONT

32

CENTER

REAR

51 V-DATA 52 V-CLK

SWIN

79

VRSWIN

80

LIN

72

LTIN

74

R-CH

L+R

2

CIN

76

SLIN

77

SYSTEM CONTROLLER

IC801 (3/5)

SWVOL

IN

SELECTOR

COMMAND

REQ

PL-RQ

TRIMMER,

VOLUME

ADAPTIVE

MATRIX

S

DIN

R-CH

VCD-ON

72

L R C

10KBIT S-RAM

LOGIC

CIRCUIT

PSEUDO STEREO

PS

RIN

CENTER

MODE

CONTROL

PS LIN

DELAY

VOLUME

1615

NOISE

SEQUENCER

26 27

CPU

INTERFACE

DATA

SCK

22 23 24 8 7 6

27 28 25

PL-CLK

PL-DATA

R-CH

DVOL

OUT

SL

OUT

SWVOL OUT

+

MODIFIED

BNR

IN

4240

C

45

1011

CVOL

IN

SLVOL

IN

TRIMMER,

VOLUME

TRIMMER,

VOLUME

R-CH

SLVOL OUT

LOUT

CVOL OUT

17

1

3

9

AMP

IC304 (2/2)

ELECTRICAL VOLUME

IC302 (2/2)

VOL1

29

CONTROL

SOUND

OUT1

20

R-CH

+

J303

SUB WOOFER

OUT

MUTING

Q232

MUTING CONTROL Q333, 334

FRONT

38

S/W-MUTE

L-CH

CENTER

REAR

L-CH

L

M

N

(Page 25)

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH

: TUNER

: CD PLAY (AUDIO)

: CD PLAY (VIDEO)

: TAPE PLAY

: REC

: VIDEO IN (AUDIO)

: GAME IN (AUDIO)

: GAME IN (VIDEO)

: 5.1CH INPUT

OUT

J304

7

VIDEO OUT

2424

7-5. BLOCK DIAGRAM – AMP Section –

HCD-VM330AV

J503

PHONE

(Page 24)

FAN MOTOR

DRIVE

Q391, 392

J501 (1/2)

+

–

+

–

J501 (2/2)

+

–

+

–

+

–

J502

L

R

M391 (FAN)

M

L

R

CENTER

FRONT SPEAKER

REAR

SURROUND

SPEAKER

FRONT L-CH

L

DBFB

SWITCH

D395, 399

D389

REAR L-CH

M

CENTER

N

Q141

DBFB AMP

IC303

DBFB LEVEL

CONTROL

Q142

R-CH

REAR OUTPUT

SELECT SWITCH

IC307

1011

98

6 12

R-CH R-CH

R-CH

STK MUTE

R-CH

R-MUTE

C-MUTE

Q524

MUTING

Q517, 518

MUTING

CONTROL

Q522

MUTING

Q602, 603

MUTING

CONTROL

Q341, 342

MUTING

Q601

MUTING CONTROL Q343, 344

POWER AMP

IC501

MUTING

Q501

MUTING

CONTROL

Q502, 516

POWER AMP

IC602

AU +9V

POWER ON

MUTING

Q521

D513

PROTECT

DETECT

Q514

+

PROTECTOR

Q505, 508

OVER LOAD

DETECT

Q604, 605

OVER LOAD

DETECT

Q606

OVER LOAD

D501

DETECT

Q506, 507

DC DETECT

Q513, 515

+ + +

+

+ ++

MUTING

Q519, 520

MUTING

CONTROL

Q523

RY501

RELAY DRIVE

Q504, 510

F-RELAY

RY502

RY503

HP CHK

+

D503

+++

47

DBFB-ON

48

DBFB-H/L

35

REAR

34

FRONT

A-MUTE

STK-MUTE

65

44

STK-MUTE

R-MUTE

23

A-MUTE

R-MUTE

C-MUTE

21

C-MUTE

SYSTEM CONTROLLER

IC801 (4/5)

RELAY DRIVE

Q503, 509

HP CHK

F-RELAY

40

R-RELAY

55

F-RELAY

45

HP-CHK

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH

: TUNER

2525

HCD-VM330AV

7-6. BLOCK DIAGRAM – DISPLAY/POWER SUPPLY Section –

22 – 12

S1 – S34

47 – 43,41 – 24,

LED3 – LED7

GRID DRIVE

LED DRIVE

Q721 – 723

89 – 93

Q713 – 717

D703 – 707

(Page 24)

(Page 22)

INDICATOR TUBE

SPE ANA

X

K

IIC-DATA, IIC-CLK

X

C

FL701

FLUORESCENT

VOLUME

DISC

ACCESS

BAND-PASS

4 LINE IN

GRID DRIVE

Q721 – 723

FILTER

IC703

ROTARY

ENCODER

RV701

ROTARY

ENCODER

RV702

F1 – F4

13L+R

X701

4MHz

VIDEO +3.3V

IC801 (5/5)

D708, 736, D781, 782, 791

81CD POWER

71FM-ON

42POWER STBY

12RESET

82AC CUT

+3.3V

REGULATOR

Q531

+5V (SW)

RESET

SWITCH

FL +3.3V

REGULATOR

CONTROL Q350, 351

Q801

D701, 702

B+ 5V

FM +7V

B+ SWITCH

Q361, 362

BU +5V

U-COM +5V

RESET SIGNAL

GENERATOR

IC802

+5V

REGULATOR

IC906

+5V

REGULATOR

IC905

MOTOR +12V

+7V

REGULATOR

Q352

D802

D803

D806

AU +9V

+5.6V

REGULATOR

Q802, 803

COM +5V

CD +8V

D866

+5V

REGULATOR

IC904

+8V

REGULATOR

IC903

+12V

REGULATOR

Q902

+9V

REGULATOR

IC901

VP – 33V

R AMP B+ R AMP B–

F AMP B+ F AMP B–

REGULATOR

TO FLUORESCENT

INDICATOR TUBE

RECT

D961 – 964

RELAY DRIVE

Q901

RECT

D911 – 914

– 33V

Q397

FL701

RECT D507

RECT D511

D901

RECT

VF1

VF2

POWER

TRANSFORMER

(SUB)

T902

T901

POWER

TRANSFORMER

(MAIN)

RY901

VOLTAGE

SELECTOR

S901

(AC IN)

LED DRIVE

86, 87, 94, 95

80 – 78, 76

IIC-DATA

IIC-CLK

S700

S770

DISPLAY

X802

16MHz

X801

32.768kHz

Q702 – 705, 718

S701, 741 – 745, S750 – 757, 760 – 767, S771 – 777

S791

CD LID

OPEN/CLOSE

DETECT

SYSTEM CONTROLLER

30 IIC DATA 29 IIC CLK 43 FL-RESET

74 POWER KEY

73 DISPLAY KEY

36 KB-SDA 20 KB-SCL 37 KB-CTRL

4 RMC

15 XIN

13 XOUT

10 SUBXIN

11 SUBXOUT

LED8, LED9

LED0, LED1,

3, 5 – 10

G8 – G13

99, 100, 2,

G2, G3, G5, G6,

98, 1, 4

G1, G4, G7

DISPLAY CONTROLLER

IC701

17 – 14

75 – 72

BPF1 – BPF4

71 L+R

66 VOL A 67 VOL B

64 JOG A 65 JOG B

82 X0

83 X1

SDA

SCL

J801

KEYBOARD

4

1

5

KEY0 – KEY3

59DOOR SW

60SDA 61SCL 77RSTX

B+ 5V+5V

REMOTE CONTROL

RECEIVER

IC702

2626

HCD-VM330AV

CD LED board

GAME LINK board

MAIN AMP board

VIDEO board

FM/AM TUNER PACK

POWER board

VOL SEL board

MAIN board

FUSE board

BD board

D SENSOR (OUT) board

LOAD SW board

L. T MOTOR board

D SENSOR (IN) board

T SENSOR board

DOOR LED board

H/P board

CONTROL board

RMC board

DISPLAY board

TC board

7-7. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

(In addition to this, the necessary note is printed in each block)

Note on Printed Wiring Boards:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

• W : indicates side identified with part number.

f

•

• : Pattern from the side which enables seeing.

• Indication of transistor.

: internal component.

C Q

B

E

These are omitted.

Q

B

CE

These are omitted.

Note on Schematic Diagram:

• 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.

f

•

• 2 : nonflammable resistor.

• 5 : fusible resistor.

• C : panel designation.

• A : B+ Line.

• B : B– Line.

• Voltages are taken with a V OM (Input impedance 10 MΩ).

• Waveforms are taken with a oscilloscope.

• Circled numbers refer to waveforms.

• Signal path.

: internal component.

Voltage variations may be noted due to normal production tolerances.

F : TUNER J : CD PLAY (ANALOG) c : CD PLAY (DIGITAL OUT) g : VIDEO E : TAPE PLAY (DECK A) d : TAPE PLAY (DECK B) G : REC q : VIDEO IN (AUDIO) j : GAME IN (AUDIO) k : GAME IN (VIDEO) f : 5.1CH INPUT

4

• Circuit Boards Location

W or less unless otherwise

2727

Sony HCD-VM330AV Service manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

3-1. DISASSEMBLY FLOW

DISASSEMBLY

upper cover

front block assy

VIDEO board

MAIN board

3-6. BACK PANEL, DC FAN (M391)

3-7. MAIN AMP BOARD, POWER BOARD, VOL SEL BOARD

3-8. MIDDLE (F) ASSY, BRACKET (MIDDLE-R), POWER BRACKET

CD mechanism deck (CDM64-30ABD61A)

BU holder assy

mech deck (TAPE)

TEST MODE

MECHANICAL ADJUSTMENTS

ELECTRICAL ADJUSTMENTS

DECK SECTION

CD SECTION

VIDEO SECTION

SENSOR SECTION

DIAGRAMS

7-1. BLOCK DIAGRAM – CD SERVO Section –

7-2. BLOCK DIAGRAM – AUDIO/VIDEO Section –

7-3. BLOCK DIAGRAM – TUNER/TAPE DECK Section –

7-4. BLOCK DIAGRAM – SURROUND Section –

7-5. BLOCK DIAGRAM – AMP Section –

7-6. BLOCK DIAGRAM – DISPLAY/POWER SUPPLY Section –

7-7. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS