Sony HCDVX-555 Service manual

HCD-VX555/VX555J

SERVICE MANUAL

Ver 1.2 2002. 05

• HCD-VX555/VX555J are the tuner,
deck, CD and amplifier section in
MHC-VX555/VX555J.

Photo : HCD-VX555

CD CD Mechanism Type CDM58E-30BD61A

Section Base Unit Name BU-30BD61A

Tape deck TCM-230AWR41C

Section Tape Transport Mechanism Type TCM-230MWR41C

E Model

HCD-VX555/VX555J

Tourist Model

HCD-VX555J

Model Name Using Similar Mechanism NEW

Optical Pick-up Name A-MAX.3

Model Name Using Similar Mechanism NEW

TCM-230PWR41C

SPECIFICATIONS

Amplifier section

The following measured at AC 120, 220, 240V,
50/60 Hz
DIN power output (rated) 100 + 100 watts

Continuous RMS power output (reference)

Inputs
GAME (VIDEO): 1 Vp-p, 75 ohms
(phono jack)
GAME (AUDIO): Voltage 250 mV,
(phono jacks) impedance 47 kilohms
MD/VIDEO (AUDIO) IN: voltage 450 mV/250 mV,
(phono jacks) impedance 47 kilohms
MIC 1/2: sensitivity 1 mV,
(phone jack) impedance 10 kilohms
Outputs
VIDEO OUT: max. output level 1 Vp-p,
(phono jacks) unbalanced, Sync.

S. VIDEO OUT: Y: 1 Vp-p, unbalanced
(4 pin/mini-DIN jack) Sync negative

AUDIO OUT: Voltage 140 mV,
(phono jack) impedance 47 kilohms.
PHONES: accepts headphones of 8
(stereo mini jack) ohms or more

(6 ohms at 1 kHz, DIN)

140 + 140 watts
(6 ohms at 1 kHz, 10%
THD)

negative load impedance
75 ohms

C: 0.286 Vp-p, load
impedance 75 ohms

FRONT SPEAKER: accepts impedance of 6 to

SURROUND SPEAKER: accepts impedance of

VIDEO CD/CD player section

System Compact disc and digital

Laser Semiconductor laser

Laser Output Max. 44.6 µW*

Frequency response 2 Hz – 20 kHz (±0.5 dB)
Wave length 780 – 790 nm
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
Video color system format NTSC, PAL

CD OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)
Wave length 660 nm
Output level –18 dBm

16 ohms

24 ohms or more

audio system

(λ=780nm)

*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.

— Continued on next page —

MINI HI-FI COMPONENT SYSTEM

9-873-865-13

2002E1600-1

© 2002.05

Sony Corporation

Home Audio Company

Published by Sony Engineering Corporation

HCD-VX555/VX555J

Tape player section

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

Wow and flutter ±0.15% W.Peak (IEC)

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 ohm unbalanced
Intermediate frequency 10.7 MHz

AM tuner section

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

Other models: 531 – 1,602 kHz

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

General

Power requirements
Thailand models: 220 V AC, 50/60 Hz

Other models: 120 V, 220 V or

Power consumption 270 watts
Dimensions (w/h/d) Approx. 280 x 360 x 425

Mass : Approx. 9.5 kg
Supplied accessories: AM loop antenna (1)

Design and specifications are subject to change
without notice.

using Sony TYPE I
cassette

0.1% W.RMS (NAB)
±0.2% W.Peak (DIN)

(with the interval set at
9 kHz)

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

230 – 240 V AC,
50/60 Hz
Adjustable with voltage
selector

mm

Remote commander (1)
Batteries (2)
Video cable (1)
FM lead antenna (1)
Front speaker pads (8)

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

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

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.

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.

2

TABLE OF CONTENTS

1. GENERAL ·········································································· 4

2. DISASSEMBLY ································································ 6

3. TEST MODE ····································································12

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

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

6. DIAGRAMS ······························································· 21

6-1. Circuit Board Location ················································· 22
6-2. Block Diagrams ···························································· 24
6-3. Printed Wiring Board Main Section ·························· 27
6-4. Schematic Diagram Main Section (1/4) ···················· 28
6-5. Schematic Diagram Main Section (2/4) ···················· 29
6-6. Schematic Diagram Main Section (3/4) ···················· 30
6-7. Schematic Diagram Main Section (4/4) ···················· 31
6-8. Printed Wiring Board BD Section ····························· 32
6-9. Schematic Diagram BD Section ································ 33
6-10. Printed Wiring Board AMP Section························· 34
6-11. Schematic Diagram AMP Section ··························· 35
6-12. Printed Wiring Board Panel Section ························ 36
6-13. Schematic Diagram Panel Section ··························· 37
6-14. Printed Wiring Board Panel SW Section ················· 38
6-15. Schematic Diagram Panel SW Section ···················· 39
6-16. Printed Wiring Board Leaf SW Section··················· 40
6-17. Schematic Diagram Leaf SW Section ····················· 41
6-18. Printed Wiring Board Driver Section······················· 42
6-19. Schematic Diagram Driver Section ························· 43

6-20. Printed Wiring Board Video Section························ 44
6-21. Schematic Diagram Video Section (1/3)·················· 45
6-22. Schematic Diagram Video Section (2/3)·················· 46
6-23. Schematic Diagram Video Section (3/3)·················· 47
6-24. Printed Wiring Board Trans Section ························ 48
6-25. Schematic Diagram Trans Section··························· 49

6-26. Printed Wiring Board Switch Section ······················ 50
6-27. Schematic Diagram Switch Section························· 50
6-28. IC Pin Function Description ······································· 51
6-29. IC Block Diagrams ····················································· 58

HCD-VX555/VX555J

7. EXPLODED VIEWS

7-1. Cabinet Section····························································· 60
7-2. Front Panel Section······················································· 61
7-3. MAIN Board Section···················································· 62
7-4. Tape Mechanism Section-1(TCM-230MWR41C) ······· 63

7-5. Tape Mechanism Section-2(TCM-230AWR41C) ········ 64
7-6. Tape Mechanism Section-3

(TCM-230PWR41C)(1/2) ············································ 65

7-7. Tape Mechanism Section-4

(TCM-230PWR41C)(2/2) ············································ 66
7-8. CD Mechanism Deck Section (CDM58E-30BD61A)·· 67
7-9. Base Unit Section (BU-30BD61A) ······························ 68

8. ELECTRICAL PARTS LIST ·······································69

3

HCD-VX555/VX555J

Main unit

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

1

SECTION 1

GENERAL

234

This section is extracted from
instruction manual.

5

e;

wl

wj
wh

wg

X

W

V

TU

CD 6 (8, 10~12, 20, 21)
CD SYNC HI-DUB qj (20, 21)
CINEMA SPACE el (24)

DECK A Z wf (19, 20)
DECK B Z qd (1 9, 20)
DIRECTION ed (19~21, 26)
DISC 1~3 2 (10, 12, 13, 21)
DISC SKIP/EX-CHANGE 4

(10~13, 16)
Disc tray 3 (9)
DISPLAY ea (9, 1 4, 31)

ECHO LEVEL wj (25)
EDIT ws (21)
ENTER ej (9, 11~13, 16, 17, 22,

24, 32)
EFFECT ON/OFF rd ( 23, 25)

FM MODE ef (18, 32)

R

Q

S

GAME e; (28)
GAME EQ rs (7, 23, 28)
GROOVE ra (23)

KARAOKE PON wl (25)

MD (VIDEO) 9 (28, 31)
MIC 1/2 wg (25)
MIC LEVEL wh (25)
MOVIE EQ eh (7, 23, 28)
MUSIC EQ rf (7, 23, 28)

P FILE ek (24)
PICTURE EFFECT wd (16)
PHONES jack qs

PLAY MODE eg (10, 11, 13, 21,

REC PAUSE/START qg (20, 21,

REPEAT ef (11, 12)

NO

P

: Connect the headphones

32)

26)

6
7
8
9

0

K

L

M

ea es ed

rf

rd
rs

ra

r; el

SHUTTLE qa (11, 12)
SPECTRUM es (25)

TAPE A/B 8 (19, 20, 26)
TUNER/BAND 7 (17, 18)
TUNER MEMORY eg (17)

VOLUME control q; (25, 27)

: Adjusts the volume.

BUTTON DESCRIPTIONS

@/1 (power) 1 (7, 8, 9, 17, 28,

31, 32)

Z OPEN/CLOSE (disc tray)

5 (10, 11, 13)

x (stop) w; (10~12, 15, 16, 19,

20, 32)

nN (play) ql (10~13, 15, 16,

20, 26)

> (go forward) qh (10~13,

17~20)

X (pause) qk (7, 10, 12, 19, 20)
. (go back) wa (7, 10~13,

17~20)

m/– (rewind) ws (11, 12,

17~20, 32)

M/+ (fast forward) qf (11, 12,

17~20)

v/V/b/B (cursor) r; (8, 9, 21,

24, 27)

eg

eh
ej
ek

4

HCD-VX555/VX555J

Remote Control

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

4

5

6

1

2

3

7

8

9

A

B

C

D

E

K

7

8

9
0

L

P

M
N

Q

T

O

R
S

U

V

W

X

Y

Z

6

wj

wk

wl

e;

ea

es

ed

ef

eg

eh

ra

r

s

r;

el
ej

ek

CD ra (10~12, 20, 21)
CINEMA SPACE ql (24)
CLEAR ed (13, 15)
CLOCK/TIMER SELECT 2

(22, 27)

CLOCK/TIMER SET 3 (8, 21,

27)

D.SKIP qs (10~13, 16)
DISPLAY ej (9, 14, 31)

EFFECT ON/OFF qk (23, 25)
ENTER ws (9, 11~13, 16, 17, 22,

24, 32)

GAME el (28)
GAME EQ wg (7, 23, 28)

KARAOKE PON ef (25)
KEY CONTROL qj (25)

MD (VIDEO) ek (28, 31)
MOVIE EQ wa (7, 23, 28)

MUSIC EQ wh (7, 23, 28)

NEXT ea (11, 12, 15, 16)
Numeric buttons eh (12, 15)

ON SCREEN qa (14)
PREV ea (12, 15, 16)

PICTURE EFFECT wj (16)
P FILE wd (24)

REPEAT 9 (11, 12)
RETURN O qg (11, 12)

SLEEP 1 (26)
SURROUND SPEAKER MODE
(MHC-VX777 only) wk (23)
SPECIAL MENU 0 (14~16)
SPECTRUM eg (25)
SELECT qd (11)

TAPE A/B rs (19, 20, 26)
TUNER/BAND r; (17, 18)
TV @/1 4 (8)
TV VIDEO 8 (8)
TV VOL +/– 6 (8)
TV CH +/– 7 (8)

VOL +/– w; (25, 27)

: Adjusts the volume.

BUTTON DESCRIPTIONS

@/1 (power) 5 (7, 8, 9, 17, 28,

31, 32)

nN (play) qd (10~13, 15, 16,

20, 26)

X (pause) qf (7, 10, 12, 19, 20)
x (stop) qh (10~12, 15, 16, 19,

20, 32)

. (go back)/PRESET – e; (7,

10~13, 17~20)

> (go forward)/PRESET + e;

(7, 10~13, 17~20)

m (rewind)/TUNING – wl (11,

12, 17~20, 32)

M (fast forward)/TUNING + wl

(11, 12, 17~20)

v/V/b/B (cursor) wf (8, 9, 21,

24, 27)

Setting the time

1 Turn on the system.
2 Press CLOCK/TIMER SET on the

remote.

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

3 Press cursor V/v repeatedly to select

CLOCK SET.

4 Press ENTER.
5 Press cursor V/v repeatedly to set the

hour.

6 Press ENTER.
7 Press cursor V/v repeatedly to set the

minute.

8 Press ENTER.

The clock starts working.

Tip

If you have made a mistake or want to change the
time, start over from step 2.

Note

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

5

HCD-VX555/VX555J

d

SECTION 2

DISASSEMBLY

• The equipment can be removed using the following procedure.

Upper case (Top)

Set

Loading panel assy

Panel board

Front panel section

Base unit

Sub trans board and Main trans board Main board and Power boar

Leaf SW board, Head (A) board and Head (B) board

VIDEO board, Driver board, Moter board and Address sensor board

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

2-1. UPPER CASE (TOP)

q;

Case (Top)

5

Two screws (Case)

7

Two screws

(+BVTP 3

8

×

qa

10)

9

Four screws (+BVTP 3

q;

×

16)

6

Screw (Case)

Side panel (L)

4

Side panel (R)

1

Two screws (Case)

2

Screw (Case)

3

Tw o

screws

(+BVTP 3

×

10)

6

2-2. LOADING PANEL ASSY

CD mechanism deck (CDM58E)

1

Turn the pulley to the direction of arrow.

HCD-VX555/VX555J

Loading panel

Front panel side

pulley

2-3. FRONT PANEL SECTION

CD mechanism deck
(CDM58E-30BD61A)

2

Pull-out the disc tray.

3

Connector (CN301)

3

q;

Connector (CN607)

4

Screws (+BVTP 3

× 8

)

6

Screw (+BVTP 3

qh

×

7

10)

2

7

Flat type wire (17 core)

9

Screws

(+BVTP 3

1

(13 core)

Connector (CN202)

×

10)

qg

5

(+BVTP 3

qs

Connector (CN1)

qa

Connector (CN2)

Front panel ASSY

Flat type wire

Screw

×

10)

qf

Screw

(+BVTP 3

×

10)

8

Screws (+BVTP 3

× 10

)

qd

Two screws (+BVTP 3

× 10

)

7

HCD-VX555/VX555J

)

2-4. PANEL BOARD

9

Two claws

6

Four claws

7

CD SWITCH board

qa

Eight screws

(+BVTP 2.6

×

5

Four screws

(+BVTP 2.6

8)

qs

PAD

SWITCH board

q;

PANEL board

×

8)

8

Nine screws

(+BVTP 2.6

qd

Five

screws

(+BVTP 2.6

×

×

8)

8)

4

Ring (FR)

3

Bracket (ring)

2

Nut

1

Knob (Volume)

2-5. SUB TRANS BOARD AND MAIN TRANS BOARD

qs

Screw (+BVTP 3

3

1

Connector (CN973)

6

MAIN TRANS

2

Connector (CN977)

4

(+BVTT 4

5

Power

transformer (T910)

board

Two screws

×

Two screws

(+BVTT 4

8)

×

qg

SWITCH board

8)

qj

qh

Three

(+BVTP 3

7

Connector (CN891)

SUB TRANS board

screws

×

10)

qd

SENSOR board

×

10)

qf

Tape mechanism deck

qa

Back panel

qf

Two screws

(+BVTP 3

q;

Six screws

(+BVTP 3

9

Three screws

(+BVTP 3

×

8)

×

10

×

10)

8

Connector (CN504)

8

2-6. MAIN BOARD AND POWER BOARD

)

4

Three screws (+BVTP 3

5

3

Two screws (+BVTP 3

POWER

×

board

16)

×

10)

7

Heat sink

6

Two screws (+BVTP 3

MAIN board

HCD-VX555/VX555J

× 8)

2

MAIN board

2-7. LEAF SW BOARD, HEAD (A) BOARD AND HEAD (B) BOARD

1

Five claws

4

HEAD (A) board

3

Screw (+PTT 2

×

4)

6

1

Two screws (+BVTP 3

2

LEAF

Remove the four solderings.

HEAD (B) board

SW board

×

10

5

Screw (+PTT 2

×

4)

9

HCD-VX555/VX555J

)

2-8. BASE UNIT

1

Pulley(B)(BU-30), chucking

2

Tw o

Screws (+PTPWH M2.6)

3

Lever (lifter)

4

Turn the pulley to the direction of arrow.

pulley

9

Remove the solder

(four portions).

6

Spring (insulator),
coil

qh

Two insulators

qs

Two stoppers

qa

Two screws (+BVTP 2.6

Holder assy

Base unit

×

8)

q;

BD board

qg

qf

Spring
(insulator),
coil

8

Flat type wire (16 core)

7

5

Screw (+PTPWH M2.6)

Spring (insulator), coil

qh

Two insulators

Screw (DIA. 12)

qd

Tw o

screws (+PTPWH M2.6

Flat type wire (25 core)

10

HCD-VX555/VX555J

2-9. VIDEO BOARD, DRIVER BOARD, MOTER BOARD AND ADDRESS SENSOR BOARD

q;

qa

Tray

3

Flat type wire

(8 core)

2

DRIVER board

Screw (+PTPWH 2.6

qs

Screw (+BVTP 2.6

8

×

8)

4

MOTOR board

×

8)

Two screws (+BVTP 2.6

6

Flat type wire (8 core)

5

Remove the two solderings of motor.

7

Connector

qd

ADDRES SENSOR board

×

8)

1

Screw (+BVTP 2.6

9

Pull-out the Table.

×

8)

qf

Flat type wire (13 core)

qg

Flat type wire (25 core)

qj

VIDEO board

qh

Tw o

Screws

(+BVTP 2.6

×

8)

11

HCD-VX555/VX555J

SECTION 3

TEST MODE

[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 x , ENTER , and ?/1 simultaneously.

2. The fluorescent indicator tube becomes blank instantaneously,

and the set is reset.

[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 power
cord is plugged in and out.

Procedure:

1. Press three buttons x , ENTER , and DISPLAY

simultaneously.

2. The fluorescent indicator tube becomes blank instantaneously,

and the set is reset.

[Tuner Step Change]

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

Procedure:

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

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

to select the BAND “AM”.

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

4. Press ENTER and ?/1 buttons simultaneously, and the display

of fluorescent indicator tube changes to “AM 9 k STEP” or
“AM 10 k STEP”, and thus the channel step is changed over.

[Function Change Mode]

• Select either VIDEO or MD of the external FUNCTION input.

Procedure:

1. Turn on the power.

2. Hold down MD (VIDEO) button then press ?/1 button , and

release ?/1 button first in order not to switch off the set
immediately.

The another function of the previous function is selected , the

input level is also changed and displayed “ MD ” or “VIDEO”.

[GC Test Mode]

• This mode is used to check the software version, FL tube, LED,
keyboard and VACS.

Procedure:

1. Press three buttons x , ENTER , and DISC 2 simultaneously.

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

3. When you want to enter the software version display mode,

press DISC 1 . The model number and destination are displayed.

4. Each time DISC 1 is pressed, the display changes starting

from MC version, GC version, CD version, CDDM version,
CDMA version, CDMB, version BDA version, BDB version,
ST version, TA version, TM version and TC version in this
order, and returns to the model number and destination display.

5. When DISC 3 is pressed while the version numbers are being

displayed except model number and destination, year, month
and day of the software creation appear. When DISC 3 is
pressed again, the display returns to the software version display.
When DISC 1 is pressed while year, month and day of the
software creation are being displayed, the year, month and day
of creation of the software versions are displayed in the same
order of version display.

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

7. In the key check mode, the fluorescent indicator tube displays

“K0 V0”. Each time a button is pressed, “KEY” value increases.
However, once a button is pressed, it is no longer taken into
account.
“VOL” value increases like 1, 2, 3 ... if rotating VOLUME
knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in
“–” direction.

8. Also when DISC 3 is pressed after lighting of all LEDs and FL
tubes, value of VACS appears.

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

[MC Test Mode]

• This mode is used to check operations of the respective sections

of Amplifier, Tuner, and Tape.

Procedure:

* To enter MC Test Mode

1. Press the ?/1 button to turn on the set.

2. Press the three buttons of x , ENTER and DISC 3
simultaneously.

3. The messages MUSIC, MOVIE, GAME and P FILE flash on
the FL display tube.
The input FUNCTION is Changed to VIDEO.

* Check of Amplifier

1. When f (CURSOR UP) button is pressed, GEQ increases to
its maximum and a message “GEQ MAX” appears.

2. When F (CURSOR DOWN) button is pressed, GEQ decreases
to its minimum and a message “GEQ MIN” appears.

3. When g (CURSOR LEFT) or G (CURSOR RIGHT) button
is pressed, GEQ is set to flat and a message “GEQ FLAT”
appears.

4. When the VOLUME control knob is turned clockwise even
slightly, the sound volume increases to its maximum and a
message “VOLUME MAX” appears for two seconds, then the
display returns to the original display.

5. When the VOLUME control knob is turned counter-clockwise
even slightly, the sound volume decreases to its minimum and a
message “VOLUME MIN” appears for two seconds, then the
display returns to the original display.

* Check of clock frequency

1. To check the frequency of clock used to run the time in the unit,
the clock output is available at pin 39 (IC 501, MASTER
CONTROL) only during MC test mode.

2. The frequency is 32.768 kHz or so.

* Tuner function

1. In the test mode, the default-preset channel is called even when
the TUNER is selected and an attempt is made to call the preset
channel that has been stored in memory. (It means that the
memory is cleared.)

2. The minimum, center and maximum frequency of each band is
set then.

12

HCD-VX555/VX555J

k

k

* Tape function

1. When a tape is inserted in Deck B and recording is started, the
input source function selects VIDEO automatically.
When CD SYNC/HI-DUB button is pressed during Rec in
function, ALC is turned on.

2. When x button is pressed to stop recording, the Tape (Deck)

B is selected and tape is rewound, tape is rewound using m
button, tape is stops at around the record-starting position and
playback of the recorded portion of the tape is started. If PAUSE
is inserted even once during recording, tape is rewound to the
position around the PAUSE position and is played back.

3. When CD SYNC / HI-DUB button is pressed during playback

of Deck B, either normal speed or high speed can be selected
by this button.

* AMS Test Mode

1. Set TAPE function

2. Select the desired loop by pressing the PLAY MODE button.

Insert a test tape AMS-110A or AMS-120 to Deck A.

3. Press the SPECTRUM button to enter the AMS test mode.

4. After a tape is rewound first, the FF AMS is checked, and the

mechanism is shut off after detecting the AMS signal twice.

5. Then the REW AMS is checked and the mechanism is shut off

after detecting the AMS signal twice.

6. When the check is complete, a message of either OK or NG

appears.

* To return to normal mode again.

1. When you want to exit this mode, press the ?/1 button.

2. The cold reset is enforced at the same time.

[VACS ON/OFF Mode]

• This mode is used to switch ON and OFF the VACS (Variable

Attenuation Control System).

Procedure:

Press the ENTER and SPECTRUM buttons simultaneously. The
message “VACS OFF” or “VACS ON” appears.

[CD Aging Mode]

Procedure:

1. Short SL501 by soldering.

2. Turn on the main power. Set a disc on the DISC1 tray. Select

CD.

3. Press the SELECT/gG button. The aging mode starts.

4. Aging status appears on the monitor screen.

TOC reading

How to exit the CD aging mode:

1. Press the ?/1 and turn off the main power.

2. Remove soldering from SL501.

[Function Change Mode]

Select either VIDEO or MD of the external FUNCTION input.

Procedure:

1. Turn on the power.

2. Press the two buttons ENTER and ?/1 at the same time.

The main power is turned on and the other function of the
previous function is selected and displayed. “MD” or
“VIDEO”.

[VIDEO CD Color-bars Mode]

On this mode, the data of the color-bars signal as a picture signal
and the 1 kHz sine wave signal as a sound signal are output by the
mechanism controller (IC502) for the video CD signal check. When
measurement of the voltage and waveform on the VIDEO board,
perform it in this mode.
For reference, the color-bars signal can be observed at CN301 pin2
using an oscilloscope.

Procedure:

1. Short the both ends of the land of SL503 of the VIDEO board.

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

3. The color-bars appears when the CD is in stop status, and it
disappears when the CD goes in play status.

4. After measuring, remove the lead wire connected.VIDEO board
(SIDE B)

[CD Servo ON/OFF Mode]

Procedure:

1. Short SL502 on the VIDEO board by soldering.

2. Turn on the main power. Set a disc on the DISC1 tray. Select

CD.

3. Press the hH button to play back CD.

4. When the > + button is pressed, 100 track jump is executed.

5. Also, every pressing of the PLAY MODE button triggers

between ON and OFF of TRACKING SERVO and SLED
SERVO.

How to quit the CD servo ON/OFF mode:

1. Press the ?/1 button to turn off the main power.

2. Remove soldering from SL502.

Last track is played bac

First track is played bac

OPEN

CLOSE

Monitor Display

1st line OPEN/CLOSE/CD PLAY display
2nd line DISC1/DISC1-15/DISC1-1/TIME display
4th line COUNT : 1 display
5th line TOTAL ERR : 00 display
6th line JITTER FF display
3rd line AGING

13

HCD-VX555/VX555J

[ VIDEO BOARD ] (SIDE A)

1 2 3

J301

CN301

CN501

SL503

SL502

SL501

CHECK LED

CN502

CN503

14

SECTION 4

r

MECHANICAL ADJUSTMENTS

HCD-VX555/VX555J

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 Torque meter

FWD

FWD
back tension

REV

REV
back tension

FF/REW

FWD tension

REV tension

CQ-102C

CQ-102C

CQ-102RC

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

Meter reading

3.06 N • m to 6.96 N • m
31 to 71 g • cm

(0.43 – 0.98 oz • inch)

0.19 N • m to 0.58 N • m

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

3.06 N • m to 6.96 N • m
31 to 71 g • cm

(0.43 – 0.98 oz • inch)

0.19 N • m to 0.58 N • m

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

6.96 N • m to 14.02 N • m
71 to 143 g • cm

(0.98 – 1.99 oz • inch)

9.80 N • m

100 g or more

(3.53 oz or more)

9.80 N • m

100 g or more

(3.53 oz or more)

DECK SECTION

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.

• Test Tape

Tape Signal Used for

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

WS-48B 3 kHz, 0 dB Tape Speed Adjustment

P-4-L300J 315 Hz, 0 dB Level Adjustment

Record/Playback Head Azimuth Adjustment

0 dB=0.775 V

DECK A DECK B

Note: Perform this adjustments for both decks

Procedure:

1. Mode: Playback

test tape
P-4-A100
(10 kHz, –10 dB)

set

MAIN board
CN301
Pin 3 (L-CH)
Pin 1 (R-CH)

MAIN board
CN301
Pin 2 (GND)

level mete

+
–

15

HCD-VX555/VX555J

e

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.

Output
level

within
1dB

L-CH
peak

R-CH
peak

within
1dB

Screw
position

L-CH
peak

Screw
position

R-CH
peak

3. Mode: Playback

test tape
P-4-A100
(10 kHz, –10 dB)

L-CH

MAIN
board
CN301
set

R-CH

waveform of oscilloscope

in phase 45° 90° 135 ° 180°

pin 3

pin 2

L

R

pin 1

good

oscilloscop

V

wrong

H

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

Tape Speed Adjustment

Note: Start the Tape Speed adjustment as below after setting to the test

mode.
In the test mode, the tape speed is high during pressing the

DECK B

CD SYNC/HI-DUB button.

Procedure:

1. Turn the power switch on.

2. Press the x button, ENTER button and DISC 3 button

simultaneously.
(The “TEST MODE” on the fluorescent indicator tube display
while in the test mode.)
To exit from the test mode, press the ?/1 button.

Mode: Playback

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

set

MAIN board
CN301 (Pin 3 : L-CH)

frequency counter

+

–

(Pin 1 : R-CH)

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

2. Press the gG button on the deck B.

3. Press the CD SYNC/HI-DUB button in playback mode.
Then at HIGH speed mode.

4. Adjust RV1001 on the LEAF SW board so that frequency
counter reads 6,000 ± 30 Hz.

5. Press the CD SYNC/HI-DUB button.
Then back to NORMAL speed mode.

6. Adjust RV1002 on the LEAF SW board so that frequency
counter reads 3,000 ± 15 Hz.

Adjustment Location: LEAF SW board

Playback level Adjustment

DECK A DECK B

Procedure:

Mode: Playback

test tape
P-4-L300J
(315 Hz, 0 dB)

level meter

forward

reverse

set

MAIN board
CN301 (Pin 3 : L-CH)

(Pin 1 : R-CH)

+

–

1. Confirm that level difference between the channels is with ±

0.5 dB.

2. After check, adjust the following RVs.
Deck A is RV302 (L-CH), Deck B is RV303 (L-CH) so that
adjustment within adjustment level as follows.

Adjustment Level:

CN301 PB level: 334.4 to 748.7 mV (–7.3 to –0.3 dB)

Adjustment Location: MAIN board

Sample Volue of Wow and Flutter: 0.3% or less W. RMS

(WS-48B)

16

HCD-VX555/VX555J

e

r

set

MD/VIDEO (AUDIO) IN (J101)
315 Hz, 50 mV (–23.8 dB)

blank tape
CS-123

600 Ω

attenuator

AF OSC

+

–

set

recorded
portion

CN301 (Pin 3 : L-CH)

(Pin 1 : R-CH)

level meter

REC Bias Adjustment DECK B

Procedure:

In the MC test mode, the “REC memory mode” is convenient for
this adjustment. In the “REC memory mode” , when the REC starts
the input signal FUNCTION is switched to VIDEO automatically.
When the REC stops, the tape returns near to the recording start
position.

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

2. Insert a tape into deck B.

3. After press REC PAUSE/START button, press REC PAUSE/
START button, then recording start.

4. Mode: Record

MD/VIDEO (AUDIO) IN (J101)

1) 315 Hz

2) 10 kHz

AF OSC

attenuator



50 mV (–23.8 dB)




600 Ω

blank tap
CN-123

set

5. Mode: Playback

recorded
portion

set

level mete

+

–

4. Mode: Record

5. Mode: Playback

6. Confirm the play back signal recorded in step 3 becomes
adjustable level as follows.
If these levels are not adjustable level, adjust the RV301 (L­CH) and RV351 (R-CH) on the MAIN board to repeat steps 4
and 5.

Adjustable level:

CN301 PB level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board

[MAIN BOARD] (Component Side)

CN301 (Pin 3 : L-CH)

(Pin 1 : R-CH)

6. Confirm the playback signal recorded in step 3 becomes
adjustable level as follows.
If these levels are not adjustable level, adjust the RV304 (L­CH) and RV354 (R-CH) on the MAIN board to repeat steps 4
and 5.

Adjustable level: Playback output of 315 Hz to playback output

of 10 kHz: ±1.0 dB

Adjustment Location: MAIN board

REC Level Adjustment

DECK B

Procedure:

In the MC test mode, the “REC memory mode” is convenient for
this adjustment. In the “REC memory mode” , when the REC starts
the input signal FUNCTION is switched to VIDEO automatically.
When the REC stops, the tape returns near to the recording start
position.

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

2. Insert a tape into deck B.

3. After press REC PAUSE/START button, press REC PAUSE/
START button, then recording start.

T11

RV11

PB LEVEL (L)

(B)

REC LEVEL (R)

(B)

REC BIAS (L)

[LEAF SW BOARD] (Component Side)

TAPE SPEED



(NORMAL) (HIGH)

RV1002



RV1001

REC LEVEL (L)

CN301

RV35 1

(B)

(B)

13

RV301

REC BIAS (R)

CN1001

RV302

(B)

PB LEVEL (L)

(A)

CN304

CN302

RV303

CN303

RV304

RV354

17

HCD-VX555/VX555J

TP(RFAC)
TP(DVC)

BD board

oscilloscope

TUNER SECTION CD SECTION

FM Tuned Level Adjustment

FM RF SIGNAL GENERATOR

75 Ω coaxial

set

Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 28 dB (at 75 Ω open)

FM ANTENNA terminal
(TM1)

Procedure:

1. Supply a 98 MHz signal at 28 dB from the ANTENNA terminal.

2. Tune the set to 98 MHz.

3. Adjust RV11 to the point (moment) when the TUNED indicator
will change from going off to going on.

Adjustment Location: MAIN board

Null Adjustment

FM RF SIGNAL GENERATOR

75 Ω coaxial

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 oscilloscope to TP (FEO).

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

3. Turn Power switch on.

4. Load a 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.

set

Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 60 dB (at 75 Ω open)

FM ANTENNA terminal
(TM1)

Procedure:

1. Supply a 98 MHz signal at 60 dB from the ANTENNA terminal.

2. Tune the set to 98 MHz.

3. Measure voltage between pin 22 and pin 3 of IC11. Adjust
T11 until the voltage becomes 0 V.

Adjustment Location: MAIN board

Adjustment Location

[MAIN BOARD] (Component Side)

NULL

T11

RV11

FM TUNED LEVEL

CN301

RV351

CN304

13

RV301

CN302

RV302

RV303

CN303

RV304

RV354

S-curve waveform

symmetry

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

Procedure :

1. Connect oscilloscope to TP (RFAC).

2. Turned Power switch on.

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

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

5. Measure the RFDC in the same way.

18

HCD-VX555/VX555J

r

IC103

IC101

TP
(RFDC)

TP
(CE)

TP
(RFAC)

TP
(XPCK)

)

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 oscilloscope to TP (TEO) and TP (DVC) board.

2. Turned Power switch on.

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

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

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

Adjustment Location :

[ BD (CD) BOARD ] — SIDE B —

1 track jump waveform

B

0V

level=1.3 ±0.6Vp-p

Specification level: x 100=less than ±22%

A
B

Symmetry

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

RF PLL Free-run Frequency

Procedure :

1. Connect frequency counter to test point (XPCK) with lead wire.

BD board

TP (XPCK)

2. Turned Power switch on.

frequency counte

+

–

3. Put the disc (YEDS-18) in to play the number five track.
Confirm that reading on frequency counter is 4.3218MHz.

Center of
waveform

A (DC voltage

19

HCD-VX555/VX555J

r

VIDEO SECTION

Frequency Adjustment

Connection:

VIDEO board

(27 MHz)

frequency counte

Procedure:

1. Connect the frequency counter to check point of the VIDEO
board.

2. Turned power switch on.

3. Press the CD button to select the CD.

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

Adjustment Location:

[VIDEO BOARD] (SIDE A)

J301

IC507

CN501

CN502

(27MHz)

(GND)

CT503
VIDEO
Frequency
Adjustment

CN503

20

SECTION 6

C

B

These are omitted.

E

Q

DIAGRAMS

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

HCD-VX555/VX555J

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.

¢

•

• C : panel designation.

The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.

• A : B+ Line.

• B : B– Line.

• H : adjustment for repair.

• Voltages and waveforms are dc with respect to ground

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

• Waveforms are taken with a oscilloscope.

• Circled numbers refer to waveforms.

• Signal path.

• Abbreviation

: internal component.

under no-signal (detuned) conditions.

Voltage variations may be noted due to normal produc­tion tolerances.

Voltage variations may be noted due to normal produc­tion tolerances.

F : FM
f : AM
E : PB (DECK A)
d : PB (DECK B)
G : REC (DECK B)
J : CD
c : digital out
g : VIDEO OUT

EA : Saudi Arabia model
IA : Indonesian model
JE : Tourist model
MY : Malaysia model
SP : Singapore model
TH : Thai model

4

W or less unless otherwise

Note on Printed Wiring Boards:

• X : parts extracted from the component side.

• : Pattern from the side which enables seeing.

• Indication of transistor.

Q

B

CE

These are omitted.

21

HCD-VX555/VX555J

6-1. CIRCUIT BOARD LOCATION

ADDRESS SENSOR board

MOTOR board

VIDEO board

CD SWITCH board

MAIN TRANS board

PANEL board

PAD SWITCH board

LEAF

SW board

HEAD (A) board

DRIVER board

HEAD (B) board

BD board

SENSOR board

SWITCH board

SUB TRANS board

MAIN board

POWER board

22

• WAVEFORMS

– BD BOARD –

1

IC101 t; (RFAC)

– PANEL BOARD –

1

IC601 is (XOUT)

STOP MODE

– MAIN BOARD –

1

IC501 qa (XC-OUT)

STOP MODE

HCD-VX555/VX555J

2

IC101 ra (TE)

3

IC101 el (FE)

4

IC101 wg (MDP)

7.5µsec

1.3Vp-p

0.5Vp-p

0.5Vp-p

2.2Vp-p

4MHz

3.0Vp-p

32.768kHz

2

IC501 qd (X-OUT)

STOP MODE

16MHz

3

IC51 ws (XOUT)

TUNER (FM)

4.5MHz

4

T301 4

TAPE B REC MODE

80.8kHz

3.1Vp-p

3.8Vp-p

4.6Vp-p

120Vp-p

– VIDEO BOARD –

1

IC502 qd (XOUT)

10 MHz

2

IC505 ih (DA-XCLK)

17 MHz

3

IC505 od (VSYNC)

20 ms

4

IC505 <z/z> (HSYNC)

4.6 Vp-p

3.6 Vp-p

3.5 Vp-p

5

IC505 <z/n> (VCK-IN)

37 nsec

6

IC505 <z/,> (DA-LRCK)

7

IC505 <zzz> (DA-BCK)

8

IC509 w; (384FSO)

22.7

472 ns

µ

s

5.4 Vp-p

4.5 Vp-p

4.5 Vp-p

9

IC509 wf (XT2)

q;

IC509 4 (MCKO)

qa

J301 4 (YOUT)

qs

J301 (COUT)

37 ns

37 ns

H

2.0 Vp-p

5.2 Vp-p

2.0 Vp-p

qd

CN301 2 (VIDEO OUT)

H

1.3 Vp-p

64 µs

3.2 Vp-p

59 ns

5.0 Vp-p
H

2.0 Vp-p

2323

HCD-VX555/VX555J

6-2. BLOCK DIAGRAMS

TUNER/CD SECTION

FM 75Ω

AM

TM1

G

OPTICAL PICK-UP

BLOCK

(A-MAX.3)

VCC
PD1
PD2

I5-10

I1-6

LD GND

GND

SW

IC11

FE1

1

2

11

VC

LD

PD

F+

F-

T+

T-

ANT IN

RB41

+5V

Q101

LD

DRIVE

IF OUT

OSC OUT

1

M102
SLED

MOTOR

M101

SPINDLE

MOTOR

7
8

VT

5

10

8

7
3

6

9

IC103

RF AMP

14

VC
VFC
A
B
C
D
E
F

LD

PD

VO1(-)

VO1(+)

VO2(-)

VO2(+)

VO3(+)

IC102

DVC

RFAC
RFDC

SW

FEI

RFDCI

IN1+

IN1-

IN2+

IN2-

IN3+

15
28

16FE
18TE

12

17

29

35

34

32

31

27

27
25

6
7
8

9
10
11

1

2

MOTOR/COIL DRIVE

52

47

56

55

1

M

2

5

VO3(-)

VO4(+)

IN3-

26

IN4R

24 MDP

M

10

VO4(-)

STBY

8

CF1 CF2

+B A+12V

X51

4.5MHz

Q1

RF IF
AMP

Q2

FM

10

XIN

1

XOUT

22

FM OSC

16

A IN

19

A OUT

20

PD

18

DIGITAL SIGNAL PROC.

38
42

50
43

39
41
40

26 SSTP

33

34

31

32

29

30

25

IC51

PLL

AM OSC

VCO STOP

IF REQ

IF IN

IC101

DIGITAL SERVO

VC
CE

RFAC
RFDC

FE
TE
SE

FFDR

FRDR

MUTING

TFDR

TRDR

SFDR

SRDR

FM

DO

DI
CL
CE

D OUT

PCMD

BCLK
LRCK
C2PO

XTSL

DATA
CLOK

XLAT

SQSO
SQCK
SENS
SCLK
SCOR

XRST

XTAI

RV11

7

15

9
8

12

6
4
5
3

+B

DO

DI

DI
CL
CE

64

1234

66
67
65
14

71

69

4
6
5
3

76
77

7
8

15

2

4

CTRL1(1-2)

MUTING

AM/FM IF MPX

FM IF

1

AM/IF

11

AM OSC

24

VCO STOP

12

IF REQ MUTING

10

AM RF IN

21

AM OSC

23

VCC

23

AFC

22

IC501

13 12 11

56 9

IC106

2

DATA

CLK
XLT

SQSO
SQCK

SENS
SCLK

SCOR

LDON

XRST

PWM1

PWM2

PWM3

L OUT

13

R OUT

14

AM IF IN

4

AM MIX OUT

CD MECHANISM CONTROLLER

11

95

5
97
10

84
83

1

2
18

82

77

28

26

24

TUNED

STEREO

10

IC502(1/2)

CTRL1

DSP DATA
DSP CLK
DSP LATCH
DSP MUTING

SUBQ DATA
SUBQ CLK
SENSE
SENSE CLK
SCOR

LD ON

DEVICE RESET

PWM1 (BD)

PWM2 (BD)

PWM3 (BD)

2

6
7

8

I2C.DATA

I2C.CLK

Q11

BUFFER

R-CH

IFT11

30

29

CD DATA

CD BCK

CD LRCK

C2PO

LPF11

LPF

IC201

OPTICAL

DIGITAL

OUT

I2C-DATA

MCLK

I2C-CLK

+3.3V

CD

DIGITAL OUT

B

VIDEO

SECTION

(Page 26)

C

VIDEO

SECTION

(Page 26)

D

MAIN
SECTION
(Page 25)

L-CH

Q103,D101

MAIN

SECTION

(Page 25)

+3.3V

REG.

A

MASTER CONTROL

TUNED

3

STEREO

2

ST MUTING

21

DO

DI
CL
CE

+5V

ST DIN

25

ST DOUT

23

ST CLK

27

ST CE

22

BU UP/DOWN SW

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

• Signal Path

: FM

: CD

: DIGITAL OUT

IC501(1/2)

LOAD IN

44

45LOAD OUT

T SENS

49

OPEN SW

CLOSE SW

46
47

48

IC701

9

MOTOR

DRIVE

7

TBL ADDRESS

4

2

IC711

SENSOR

M

S701

OPEN/CLOSE

S711

BU UP/

DOWN

M721
TURN

MOTOR

2424

MAIN SECTION

J402

L

AUDIO OUT

R

J401

VIDEO OUT

VIDEO

SECTION

(Page 26)

MD/VIDEO

(AUDIO)

AUDIO

VIDEO

HP901

HEAD

HRPE901

REC/PB
HEAD

ERASE

HEAD

G

L

R

L

R

PB

VMP-VIDEO IN

J101

J601

DECK-A

DECK-B

L-CH

R-CH

R-CH

R-CH

R-CH

R-CH

R-CH

M901

CAPSTAN

MOTOR

1

3

57

S1001

(A PLAY)

S1002

(B PLAY)

S1003

(A HALF)

S1006

(B HALF)

S1005
(REC A)

S1009
(REC B)

A TRG M+

B TRG M+

M

IC781

VIDEO SWITCH

/DRIVER

VIN1

VIN2

2

IC303
PB EQ

AMP

IC304
PB EQ

AMP

75

RV304

REC
BIAS

T301

IC1001
A REEL

IC1002
B REEL

VOUT

SW1

C332,L301

BIAS
TRAP

DET

DET

Q1001
MOTOR

CONT

7

VIDEO SWITCH

(IC601)

RV302

RV303

1

2

3

Q302,303

BIAS
OSC

PM901PM902

RV1002

NORM S

RV1001
HIGH S

IC302

REC/PB SWITCH

TA+12V

Q301

+6V

Q393,394

A TRIG
DRIVE

Q391,392

B TRIG
DRIVE

IC401

OUTPUT SELECT

1
4

IC105

INPUT SELECT

12
11

4

R CH

Q141

DC

BIAS

CAP MOTOR

SPEED CONT

Q396,397

CAP MOTOR

Q395

DRIVE

HCD-VX555/VX555J

IC103

ANALOG SURROUND

L-OUT

L-IN

7

BP/SR

1

CONT2

2

CONT3

3

70

120

REC

38

EQ

BIAS

SW

CAP M CONT

55

SUR1
SUR2
SUR3

48

A

B

46

36

NORM

33

CROM

32

3

109

Q401

BUFFER

13

109

Q104

Q304,305
SWITCH

A+12V

69

78

TC RELAY

GAME/VIDEO

54

1

CAP M H/L

AUDIO OUT ON/OFF

A PLAY

56

B PLAY

57

A HALF

70

B HALF

91

A SHUT

89

B SHUT

91

A TRIG

51

52

B TRIG

DECK PROCESSOR

REC

RV301

IC301

PB

39

A120/70

17

10

DOLBY

B

DOL

PAS

PB A/B

ALC ON/OFF

NORM/HIGH

B NORM/CROM/METAL

15

16

18

19

67

66

68

ALC

PB A/B

EQ H/N

BIAS ON/OFF

20

22

65

61

BIAS

RM ON/OFF

NR ON/OFF

REC /PB/PASS

23

24

60

59

NR ON/OFF

REC MUTING

TUNER

SECTION

(Page 24)

VIDEO

SECTION

(Page 26)

REC

PB

LM ON/OFF

25

58

R/PB PAS

TC MUTING

26

53

43

40

MS OUT

AMS IN

L-CH

A

LOUT

E

IC104
1

SUR1

SUR2

SUR3

5

6 7 80

SUR1

SUR2

IC501(2/2)

MASTER CONTROL

SUR3

IC101

INPUT SELECT

G EQ

VOL OUT2

IN2A

40

IN2C

38

VSELA IN2

34

IN2D

37

INVOL OUT2

81

GEQCLK

GEQ DATA

SIRCS

4

IC603
SIRCS

35

39

21
22

R-CH

32.768kHz

10

X501

XC IN

IN2B

DATA
CLOCK

11

73

S752

DISPLAY

16MHz

15

XC OUT

DISPLAY KEY

X502

X IN

3
2

24

13

X OUT

POWER KEY

74

S796

?/1

Q794

6
5

Q101,102

Q503

SWITCH

LED

DRIVER

IC102

DBFB
CONT

DBFB

79

STBY LED

75

7

DBFB ON/OFF

D794

?/1

Q504,505

MUTING

82

LINE MUTING

CONT

Q103

MUTING

Q503,504

MUTING

83

STK MUTING

84

CONT

STBY RELAY

87

88

PROTECT

FRONT RELAY

18

Q581

MUTING

J721
MIC1

J722
MIC2

43

XRST

100

IC501

POWER

AMP

12

30

29

IIC DATA

CD POWER

AC CUT

RESET

12

41

IIC CLK

10

D841

M RESET

38

XRST

Q721

LIMITER

VCD +5V
(UNSW)

Q575

Q861

MUTING

CONT

TH701

F

Q551

OVER LOAD
DETECTOR

+B

3
2

VIDEO

SECTION

(Page 26)

CD D+5V(SW)
CD A+5V(SW)

Q862

MUTING

IC722

TC D+5V

AUDIO +5V

TC M+9V

CDM M+7V

STBY +5V

Q505,506
OVER HEAT

DETECTOR

RV722

MIC

LEVEL

1

TC A+12V

MIC A+12V

ST A+12V

VREF
D +5V

VCC

LED +7V

IC502

RESET13

A+12V

Q821,822
PROTECT

DETECTOR

2

D579

D577

D502

IC721

ECHO
AMP

I2C-DATA
I2C-CLK

Q831

FAN ON

SWITCH

D580

D920-922

Q823

PROTECT

CONT

RV721

ECHO
LEVEL

9

IC722

6
5

CD

SECTION

D

(Page 24)

IC911 Q911,912

+5V

3

1

REG

D952
D953
D509
D510

D507

D511

D512

D508

IC921

+12V

3

REG

CD POWER

SWITCH

IC951

+5V

3

REG

IC961

+9V

3

REG

+3.3V

Q828,829
PROTECT

7

SWITCH

1

1

1

Q824,825

IC616
+3.3V

+3.3V

3

EVER +5.6V

RELAY
DRIVE

VIDEO SWITCH

D824

D911 D910

REG

1

RY801

IC602

17

SPEANA

6

BPF

12

5
4
3

11

S768-781

FUCTION

KEY

S753-758
S760-765

FUCTION

KEY

S601-605
S791-795

FUCTION

KEY

S751 VOLUME

(Encoder)

X601

4MHz

-VG

D822

POWER

AMP

IC971
+5.6V

3

REG

• RCH is omitted due to
same as L-CH.

• Signal Path

: PB (DECK A)

: PB (DECK B)

: REC (DECK B)

: FM

: CD

: VIDEO

TM801

L

R CH

R CH

Q891,892

FAN

DRIVE

DISPLAY CONTROL

HEADPHONE

78

VIDEO SWITCH

76

71

.

BPF 0

67

BPF 5

72

ALL BAND

73

KEY0

64

KEY1

65

KEY2

66

VOL A

80

VOL B

79

XIN

83

XOUT

82

I2C DATA

60

I2CCLOCK

61

RESET

77

Q941

-V

REG

D543

+B

-B

D901-904

D906-909

D972-975

1

Q971
RELAY

DRIVE

SPEAKER

R

J102

L

SURROOUND

RR CH

J631

PHONES

M961
(FAN)

IC601

6

10

.

12

P1

22

.

P39

24
41

.

43
47

5

G1

1
.

G13

100

93

TUNER

55

CD

57

TAPE A/B

54

MD/VIDEO

56

GAME IN

58

DISC1

59

DISC2

74

DISC3

75

REC/PAUSE

52

ENTER

53

VKK

48

D977

T910

JW973

EXCEPT VX555:TH

JW972

EXCEPT VX555:TH

F971

F1

F2

T972

RY971

FL601

FLOURESCENT

INDICATOR TUBE

F1 F2

D608-609
D613-618

Q601-605

LED

DRIVER

D791-793

Q791-793

LED

DRIVER

Q751

LED

DRIVER

Q752

LED

DRIVER

-VG

JW990

EXCEPT VX555:TH

JW984

VX555:TH

D751
REC

D752

ENTER

S901

VOLTAGE

SELECTOR

120
220

230-240

120
220

230-240

EXCEPT VX555:TH

AC
IN

JW993

VX555:TH

2525

HCD-VX555/VX555J

VIDEO CD SECTION

CD

SECTION

(Page 24)

CN503

(TO FLASH WRITER)

TXD

SCLK

BUSY

RXD

RST

PGM

XWR

HOLD

MAIN

SECTION

(Page 25)

CD DATA/CD BCK/CD LRCK/C2PO

B

CD MECHANISM CONTROLLER

XRST

F

IC502(2/2)

CHROMA LEVEL

DAC RESET

DATA1I

32

CLK1

33

RTS1

34

DATA1O

31

XRESET

12

CNVSS

9

BUS XWRL

46

BUS XHOLD

41

DATAI

DATAO

DF LATCH

CLK1

CL680 INTERRUPT

CL680 HSEL

CL680 HRDY

680 RESET

XOUT

BGP

XIN

22

65V.MUTING

66

36
35
88

37

21H SYNC IN

45V SYNC

20
87
85
86

15

13

+5V

IC303
Y AMP

3RESOLUTION

L.P.F

4

112
119

117

Q501

BUFFER

Q502

BUFFER

X501

10MHz

Q531

+3.3V REG

(IC505 VDD)

101

93

114
121
113
60

+3.3V

Q301

IC505

MPEG VIDEO/AUDIO DEC

VIDEO SIGNAL PROC

4

3
5
6

CD DATA

CD BCK
CD LRCK
CD C2PO

HD OUT
HD IN

HCK

H SYNC

V SYNC

HINT
HSEL
HRDY
RESET

Y OUT
C OUT

DA DATA

DA BCK

DA LRCK

DA XCLK

VCK IN

MD0

MD15

MA0

MA10

RAS0

CAS

MWE

MCE

L.P.F

IC509

DIGITAL FILTER

D/A CONV

10

RSTB

9

MD

V OUT L

V OUT R

IC507
DRAM

A0
A8

RAS
UCAS
LCAS
WE

IC506

A0
A10

CE

DQ1

DQ16

O0
O7

A11

A17

XT1

XT2

ı

14

11

R-CH

1

X503

27MHz

24

2
5

.

7

10

.

31
34

.

36
39

21
23

.

25
29

.

1

.

12

.

4

.

5

.

11

.

10

.

6

8

MC

7

ML

69
75
110

111
108

86

106

10
15

.

17

.

19

.

21

.

23
29

58
56

.

54

.

52
50

.

48

.

46

44

42
40
38
37

IC504

IC504

27MHz

18

DATA

17

BCK

19

LRCK

111098

20

384FSO

3456

4

MCKO

16
19

.

22
26

14
28
29
13

FLASH ROM

20

13

.
3

.
2

.

31

30

5

CCT

10

VIN

8

TINT

5

BGP

1

VIN

IC302
C AMP

VOUT

L.P.F

IC101

1VOUT

6

75

2

7

1
8

Y IN

C IN

MUTE A
MUTE B

IC304

VIDEO AMP

C OUT

15Y OUT1
14Y OUT2

9

12MIX OUT1
11MIX OUT2

Y

4

3

C

2

1

VMP-VIDEO IN

J301

S VIDEO

OUT

LOUT

MCLK

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

• Signal Path

: CD

: VIDEO

MAIN

SECTION

G

(Page 25)

MAIN

SECTION

E

(Page 25)

CD

SECTION

C

(Page 24)

2626