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
© 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
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
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 coaxial
set
Carrier frequency : 98 MHz Modulation : AUDIO 1 kHz, 75 kHz deviation (100%) Output level : 28 dB (at 75 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 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 10M 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 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 M).
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 75
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
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