Sony HCD-VM330AV User manual

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
This stereo system is equipped with the Dolby* Pro
Logic Surround decoder.
* Manufactured under license from Dolby
Laboratories. Dolby, Pro Logic, and the
double-D symbol ;are trademarks of Dolby
Laboratories. Confidential unpublished works.
'1992-1997 Dolby Laboratories. All rights
reserved.
E Model
HCD-VM330AV
Ver 1.0 2001.06
9-873-189-01 Sony Corporation
2001F0500-1 Home Audio Company
C2001.6 ShinagawaTec Service Manual Production Group
COMPACT DISC DECK RECEIVER
SPECIFICATIONS
HCD-VM330AV is the Amplifier, Video CD/CD player,
Tape Deck and Tuner section in MHC-VM330AV.
– Continued on next page –
Model Name Using Similar Mechanism NEW
CD CD Mechanism Type CDM64-30ABD61A
Section Base Unit Name BU-30ABD61A
Optical Pick-up Name OP Assy (A-MAX. 3)
TAPE Model Name Using Similar Mechanism HCD-MG110
Section Tape Transport Mechanism Type CM8L6Z511A
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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2
HCD-VM330AV
TABLE OF CONTENTS
1. SERVICING NOTE.................................................. 4
2. GENERAL ................................................................... 5
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 7
3-2. Upper Cover .................................................................... 8
3-3. Front Block Assy............................................................. 8
3-4. VIDEO Board.................................................................. 9
3-5. MAIN Board ................................................................... 9
3-6. Back Panel, DC Fan (M391)........................................... 10
3-7. MAIN AMP Board, POWER Board,
VOL SEL Board .............................................................. 10
3-8. Middle (F) Assy, Bracket (Middle-R),
Power Bracket ................................................................. 11
3-9. CD Mechanism Deck (CDM64-30ABD61A) ................ 11
3-10. Base Unit (BU-30ABD61A)........................................... 12
3-11. BU Holder Assy .............................................................. 12
3-12. Cassette Lid Assy (A)/(B)............................................... 13
3-13. Mech Deck (TAPE) ......................................................... 13
4. TEST MODE.............................................................. 14
5. MECHANICAL ADJUSTMENTS....................... 15
6. ELECTRICAL ADJUSTMENTS
Deck Section ............................................................................. 15
CD Section ................................................................................ 17
Video Section ............................................................................ 18
Sensor Section........................................................................... 19
7. DIAGRAMS
7-1. Block Diagram –CD SERVO Section –........................ 21
7-2. Block Diagram –AUDIO/VIDEO Section –................ 22
7-3. Block Diagram –TUNER/TAPE DECK Section –...... 23
7-4. Block Diagram –SURROUND Section –...................... 24
7-5. Block Diagram –AMP Section –................................... 25
7-6. Block Diagram
–DISPLAY/POWER SUPPLY Section –...................... 26
7-7. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 27
7-8. Printed Wiring Board –BD Section –............................ 28
7-9. Schematic Diagram –BD Section –............................... 29
7-10. Printed Wiring Board –AUDIO/VIDEO Section –....... 30
7-11. Schematic Diagram
–AUDIO/VIDEO Section (1/3) –.................................. 31
7-12. Schematic Diagram
–AUDIO/VIDEO Section (2/3) –.................................. 32
7-13. Schematic Diagram
–AUDIO/VIDEO Section (3/3) –.................................. 33
7-14. Printed Wiring Boards
–CD MOTOR/SENSOR Section –................................ 34
7-15. Schematic Diagram
–CD MOTOR/SENSOR Section –................................ 35
7-16. Printed Wiring Board –TC Section –............................. 36
7-17. Schematic Diagram –TC Section –............................... 37
7-18. Schematic Diagram –MAIN Section (1/4) –................. 38
7-19. Schematic Diagram –MAIN Section (2/4) –................. 39
7-20. Schematic Diagram –MAIN Section (3/4) –................. 40
7-21. Schematic Diagram –MAIN Section (4/4) –................. 41
7-22. Printed Wiring Board –MAIN Section –....................... 42
7-23. Printed Wiring Boards –AMP Section –........................ 44
7-24. Schematic Diagram –AMP Section –............................ 45
7-25. Printed Wiring Boards –DISPLAY Section –............... 46
7-26. Schematic Diagram –DISPLAY Section –.................... 47
7-27. Printed Wiring Board –CONTROL Section –............... 48
7-28. Schematic Diagram –CONTROL Section –.................. 49
7-29. Printed Wiring Boards –POWER Section –.................. 50
7-30. Schematic Diagram –POWER Section –...................... 51
7-31. IC Pin Function Description ........................................... 55
8. EXPLODED VIEWS
8-1. General Section ............................................................... 67
8-2. Front Panel Section ......................................................... 68
8-3. Chassis Section ............................................................... 69
8-4. Mechanism Deck Section (CDM64-30ABD61A) ......... 70
8-5. Base Unit Section (BU-30ABD61A) ............................. 71
9. ELECTRICAL PARTS LIST ............................... 72
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
(with the interval set at
10 kHz)
531 –1,602 kHz
(with the interval set at
9 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
General
Power requirements 110 –120 V or 220 –
240 V AC, 50/60 Hz
Adjustable with voltage
selector
Power consumption 200 watts
Dimensions (w/h/d) incl. projecting parts and controls
Approx. 280 ×383 ×480
mm
Mass: Approx. 12.1 kg
Design and specifications are subject to change
without notice.
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3
HCD-VM330AV
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED
LINE WITH MARK 0ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
The laser diode in the optical pick-up block may suffer electro-
static 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
pick-up block. Therefore, when checking the laser diode emis-
sion, 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.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
Notes on chip component replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
•Keep the temperature of the soldering iron around 270 ˚C dur-
ing 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.
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4
HCD-VM330AV SECTION 1
SERVICING NOTES
CD-TEXTTEST 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/1button to turn the power on, set the disc to the
disc table with the “test disc”label facing up, and chuck the
disc.
2. Pressthe[CD] buttontosetCDfunction,andpressthe 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.
Fordetails of thedisplayed contentsfor eachtrack, referto“Table
1: CD-TEXT TEST DISC TEXT Data Contents”.
Restrictions in CD-TEXT Display
In this unit, some special characters will not be displayed prop-
erly. These will be displayed as a space or a character resembling
it.
Table 1: CD-TEXT TEST DISC TEXT Data Contents
(TRACKS No. 1 to 20:Normal Characters)
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
TRACK
No. Displayed Contents
Note: Track No. 21 to 99 are not displayed.
.>
CLEANING OBJECTIVE LENS OF OPTICAL PICK-UP
•In cleaning the objective lens of optical pick-up, be sure the
following below.
(Figure A)
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 objective lens spirally from center toward outside. (See
Figure A)
2 Remove the
magnet assy.
1 Open the torsion holder
(magnet) in direction of
arrow
A .
A
optical pick-up
bracket (top 60) hole
3 Put a cotton bud into
the hole on the bracket
(top 60) and clean the
OP lens.
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5
HCD-VM330AV
SECTION 2
GENERAL This section is extracted from
instruction manual.
4
Parts Identification
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)
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
BUTTON DESCRIPTIONS
Z(deck A) 1
=/1 (power) 2
m(rewind) 6
nN(play) 6
XPAUSE 6
M(fast forward) 6
x(stop) 6
—.(go back) 6
>+ (go forward) 6
Z(deck B) 9
The items are arranged in alphabetical order.
Refer to the pages indicated in parentheses ( ) for details.
Main unit
1
es
ea
e;
wl
wk
wj
wh
wg
wf
wd
ws
wa
234 567 8 9
qs
w; ql
qd
0
qa
qf
qg
qh
qj
qk
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6
HCD-VM330AV
Remote Control
qg
qh
ql
qk
qj
w;
1234
wa
ws 6
7
8
9
5
qf
0
qd
qa
qs
wd
wf
wg
wh
wj
wk
wl
e;
ea
es
ed
ef
eg
eh
ek
ej
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 Owf (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/DISCtwl ea
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.
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HCD-VM330AV
7
•This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
3-2. UPPER COVER
(Page 8)
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)
3-12. CASSETTE LID ASSY (A)/(B)
(Page 13)
3-3. FRONT BLOCK ASSY
(Page 8)
3-4. VIDEO BOARD
(Page 9)
3-3. FRONT BLOCK ASSY
(Page 8)
SET
3-11. BU HOLDER ASSY
(Page 12)
3-13. MECH DECK (TAPE)
(Page 13)
3-8. MIDDLE (F) ASSY,
BRACKET (MIDDLE-R),
POWER BRACKET
(Page 11)
3-9. CD MECHANISM DECK
(CDM64-30ABD61A)
(Page 11)
3-10. BASE UNIT
(BU-30ABD61A)
(Page 12)
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.
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HCD-VM330AV
8
3-3. FRONT BLOCK ASSY
Note: Follow the disassembly procedure in the numerical order given.
3-2. UPPER COVER
1 three screws
(BVTP3
× 8)
2 five screws
(BVTP3
× 8)
2 two screws
(BVTP3
× 8)
3 upper cover
1 three screws
(BVTP3
× 8)
7 two bosses
6 screw (KTP3 × 8)
3 screw (BVTP3 × 8)
4 two herness
5 three screws
(BVTP3
× 8)
6 screw (KTP3 × 8)
8 front block assy
7 two bosses
2 three connectors
(CN310, 503, 803)
2 connector (CN315)
1 wire (flat type) (10 core)
(CN311)
1 wire (flat type) (11 core)
(CN312)
1 wire (flat type) (17 core)
(CN301)
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HCD-VM330AV
9
3-4. VIDEO BOARD
3-5. MAIN BOARD
3 two screws
(BVTP3
× 10)
5 two screws
(BVTP3
× 10)
4 MPEG bracket
6 VIDEO board
1 wire (flat type) (25 core)
(CN501)
1 wire (flat type) (13 core)
(CN502)
2 screw (BVTP3 × 8
)
3 three screws
(BVTP3
× 8)
3 two screws
(BVTP3
× 8)
3 screw (BVTP3 × 8)
3 screw
(BVTP3
× 8)
4 screw
(BVTP3
× 8)
5 MAIN board
1 wire (flat type) (18 core)
(CN309)
2 connectors
(CN304)
2 connectors
(CN903)
2 connectors
(CN317)
2 connectors
(CN305)
2 connector
(CN313)
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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HCD-VM330AV
10
3-7. MAIN AMP BOARD, POWER BOARD, VOL SEL BOARD
3-6. BACK PANEL, DC FAN (M391)
5 back panel
1 two screws
(BVTP3
× 10)
1 two screws
(BVTP3
× 10)
1 thirteen screw
s
(BVTP3 × 10)
3 four screws
(BVTP3
× 10)
4 DC fan (M391)
2
5 center bracket
4 three screws
(BVTP3
× 8)
2 two screws
(BVTP3
× 8)
1 connector
(CN502)
3 MAIN AMP board
8 POWER board
7 VOL SEL board
6 two screws
(BVTP4
× 8)
6 two screws
(BVTP4
× 8)
2 four screws
(BVTP3
× 8)
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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HCD-VM330AV
11
3-8. MIDDLE (F) ASSY, BRACKET (MIDDLE-R), POWER BRACKET
3-9. CD MECHANISM DECK
(CDM64-30ABD61A)
4 middle (F) assy
2 two screws (BVTP3 × 8)
1 connector
(CN901)
3 screw (BVTP3 × 8)
5 three screws
(BVTP3
× 8)
7 bracket (middle-R)
6 two screws
(BVTP3
× 8)
0 two screws
(BVTP3
× 8)
8 screw
(BVTP3
× 8)
3 screw
(BVTP3
× 8)
qa power bracket
9 three screws
(BVTP3
× 8)
2 table (60)
lower chassis
1 screw (2.6 × 8)
5 CD mechanism deck
(CDM64-30ABD61A)
4 two screws
(BVTP3
× 8
)
3 screw
(PSW3
× 6)
4 four screws
(BVTP3
× 8)
4 four screws
(BVTP3
× 8)
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Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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HCD-VM330AV
12
3-11. BU HOLDER ASSY
3-10. BASE UNIT
(BU-30ABD61A)
1 three screws
(BVTP3
× 8)
2 bracket (top 60)
3 base unit
(BU-30ABD61A
)
4 BU holder assy
1 tension spring (F1)
2 tension spring (F-2)
3 two screws
(PTP2.6
× 8
)
3 two screws
(PTP2.6
× 8)
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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HCD-VM330AV
13
3-12. CASSETTE LID ASSY (A) / (B)
3-13. MECH DECK (TAPE)
5 cassette li
d
assy (B)
3 cassette lid
assy (A)
2 two claws
4 two claws
1 Open the cassette lid
assy (A)/(B).
4 cassette holder assy (A)
0 two screws
(BVTP2.6)
1 three screws
(BVTP3 × 10)
qs mech deck (TAPE)
qa MD bracket
2 two screws
(BVTP3 × 10
)
9 TC board
8 screw (BVTP2.6)
6 two screws
(BVTP2.6)
7 shield plate (MD)
5 cassette
holder
assy (B)
3
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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14
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 AMTuning Interval]
•The AM tuning interval can be changed over 9 kHz or 10 kHz.
Procedure:
1. Press the I/1button 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/1button to turn the power OFF.
4. Press the [ENTER] and I/1buttons 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 return-
ing the set to the customer after repair.
Procedure:
1. Press the I/1button 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.
[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 mbutton 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 in-
creases. 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.
[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/1button 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 Mbutton to move the
optical pick-up to outside track and display “SLED OUT”, or
press the mbutton 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.
w w w . x i a o y u 1 6 3 . c o m
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7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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15
HCD-VM330AV
SECTION 5
MECHANICAL 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 demagne-
tizer.
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
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)
Mode Torque meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Meter reading
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
SECTION 6
ELECTRICAL ADJUSTMENTS
Precaution
1. Demagnetize the record/playback head with a head demagne-
tizer.
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 ad-
justment should be completed before performing recording
circuit adjustment.)
6. The adjustments should be performed for both L-CH and R-
CH.
7. Switches and controls should be set as follows unless other-
wise 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
DECK SECTION
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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16
HCD-VM330AV
Tape Speed Check DECK B
Mode: Playback
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)
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.
3. Mode: Playback
4. Repeat step 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the
parts adjusted.
Screw
position
L-CH
peak
within
1dB
Output
level
L-CH
peak
R-CH
peak
within
1dB
Screw
position
R-CH
peak
set
test tape
P-4-A100
(10 kHz, – 10 dB)
R-CH
oscilloscope
L-CH
R-CH
VH
waveform of oscilloscope
in phase 45 ° 90 ° 135 ° 180 °
good wrong
MAIN AMP board
FRONT SPEAKER terminal (J501
)
L-CH
+
–
set
test tape
WS-48A
(3 kHz, 0 dB)
MAIN AMP board
FRONT SPEAKER terminal (J501)
L-CH, R-CH
frequency counter
Record/Playback Head Azimuth Adjustment
Note: Perform this adjustments for both decks
Procedure:
1. Mode: Playback (FWD)
DECK A DECK B
set
MAIN AMP board
FRONT SPEAKER terminal (J501)
L-CH, R-CH
+
–
level meter
test tape
P-4-A100
(10 kHz, –10 dB)
Adjustment Location:Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
reverse
forward
w w w . x i a o y u 1 6 3 . c o m
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1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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17
HCD-VM330AV
CD SECTION
Note :
1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. UseYEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MΩimpedance.
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
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 betweenA and B. And confirm peak to peak level
within 4 ±1 Vp-p.
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
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.
BD board
Oscilloscope
TP(FEO)
TP(DVC)
symmetry
S-curve waveform
within 4 ±1Vp-p
A
B
TP (RFAC) orTP(RFDC)
TP(DVC)
BD board oscilloscope
Note: Clear RF signal waveform means that the shape “◊”can be
clearly distinguished at the center of the waveform.
RF signal waveform
E-F Balance (1Track jump) Check
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 Xbutton. (Becomes the 1track jump mode.)
5. Confirmthat thelevel B andA (DCvoltage)on theoscilloscope
waveform.
1 track jump waveform
Specification level: x100=less than ±22%
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.
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.
oscilloscope
BD board
TP (TEO)
TP (DVC)
+
–
A
B
+
–
frequency counte
r
BD board
TP (XPCK)
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.1 ±0.3Vp-p
0V
Center of
waveform
B
Symmetry
A (DC voltage
)
level=1.3 ±0.6Vp-p
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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18
HCD-VM330AV
Checking Location :
[ BD BOARD ] —SIDE B —
TP (DVC)
TP (FEO)
TP (XPCK)
TP (TEO)
TP (RFDC)
TP (VC)
TP
(RFAC)
IC103
IC101
TP (FEI)
R120
VIDEO SECTION
Video Frequency Adjustment
Connection:
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
IC507
TP (GND)
TP (27MHz) CT503
Video
Frequency
Adjustment
VMP board
TP (27MHz)
TP (GND)
frequency counte
r
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

19
HCD-VM330AV
SENSOR SECTION
Disc Sensor Level Adjustment
Procedure:
1. Connect anoscilloscope toTP (DISCSENSOR) andTP (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.
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
becomesless than0.5Vp-pbesides becomesas littleaspossible.
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:
Waveform when no disc
,
turn the RV301
NG OK
more than 4 Vp-p
Waveform when disc in
less than 0.5 Vp-
p
[MAIN BOARD] (CONDUCTOR SIDE)
RV301
Disc Sensor Level
Adjustment TP (GND)
TP (DISC SENSOR)
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0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

20
HCD-VM330AV
MEMO
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com