Sony HCD-VX99 Service manual

HCD-VX99

SERVICE MANUAL

HCD-VX99 is the tuner, deck, CD and amplifier
section in MHC-VX99.

Model Name Using Similar Mechanism HCD-VX77/VX77J

CD

SECTION

TAPE DECK

SECTION

CD Mechanism Type CDM58-K2BD37A

Base Unit Type BU-K2BD37A

Optical Pick-up Type KSM-213DAP/Z-NP

Model Name Using Similar Mechanism HCD-VX77/VX77J

Tape Transport Mechanism Type TCM-230PWR11

E Model

Amplifier section

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

Continuous RMS power output (reference)

Inputs
MD/VIDEO (AUDIO) IN:voltage 450 mV/250 mV,
(phono jacks) impedance 47 kΩ
MIC: sensitivity 1 mV,
(phone jack) impedance 10 kΩ

Outputs
VIDEO OUT: max. output level 1 Vp-p,
(Phono jack) unbalanced, Sync

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

PHONES: accepts headphones of 8
(stereo mini jack) Ω or more
FRONT SPEAKER:

(4 Ω at 1 kHz, DIN)

300 + 300 W
(4 Ω at 1 kHz,
10% THD)

negative, load impedance
75 Ω

C: 0.286 Vp-p
load impedence 75 Ω

accepts impedance of 4 to
16 Ω

SPECIFICATIONS

VIDEO CD/CD player section

System Compact disc and digital

Laser Semiconductor laser

Laser output Max. 44.6

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

CD OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)
Wavelength 660 nm
Output Level –18 dBm

audio system

(λ=780nm)
Emission duration:
continuous

*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.

NTSC, PAL

µ

W*

Tape player section

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

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 Ω unbalanced
Intermediate frequency 10.7 MHz

AM tuner section

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

Other models: 531 – 1,602 kHz

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

40 – 13,000 Hz (±3 dB),
using Sony TYPE I
cassette

(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)

— Continued on next page —

COMPACT DISC DECK RECEIVER

1

General

Power requirements

Power consumption

120 V, 220 V or 230 - 240
V AC, 50/60 Hz
Adjustable with voltage
selector

300 W

TABLE OF CONTENTS

1. SERVICE NOTE ······························································· 4

2. GENERAL ·········································································· 5

3. DISASSEMBLY ································································ 7

Dimensions (w/h/d)

Mass:

Supplied accessories: AM loop antenna (1)

Design and specifications are subject to change
without notice.

Approx. 280 x 360 x 425
mm (11x 14
in.)

Approx. 11 kg
(24 lb. 5 oz)

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

3

/16 x 1611/

4. TEST MODE ···································································· 12

16

5. MECHANICAL ADJUSTMENTS ····························· 17

6. ELECTRICAL ADJUSTMENTS ······························· 17

7. DIAGRAMS

7-1. Circuit Board Location ····················································· 23
7-2. Block Diagrams ································································ 25
7-3. Printed Wiring Board – BD Section – ······························ 28
7-4. Schematic Diagram – BD Section – ································· 29
7-5. Printed Wiring Board – Video Section – ·························· 30
7-6. Schematic Diagram – Video (1/3) Section – ···················· 31
7-7. Schematic Diagram – Video (2/3) Section – ···················· 32
7-8. Schematic Diagram – Video (3/3) Section – ···················· 33
7-9. Printed Wiring Board – Main Section – ··························· 34
7-10. Schematic Diagram – Main (1/3) Section – ····················· 35
7-11. Schematic Diagram – Main (2/3) Section – ····················· 36
7-12. Schematic Diagram – Main (3/3) Section – ····················· 37
7-13. Printed Wiring Board – Power AMP Section – ················ 38
7-14. Schematic Diagram – Power AMP Section – ··················· 39
7-15. Printed Wiring Board – Panel Section – ··························· 40
7-16. Schematic Diagram – Panel Section – ····························· 41
7-17. Printed Wiring Board – Leaf SW Section – ····················· 42
7-18. Schematic Diagram – Leaf SW Section – ························ 43
7-19. Printed Wiring Board – Driver Section – ························· 44
7-20. Schematic Diagram – Driver Section – ···························· 45
7-21. Printed Wiring Board – Trans Section – ··························· 46
7-22. Schematic Diagram – Trans Section – ····························· 47
7-23. IC Pin Function ································································ 48
7-24. IC Block Diagrams ··························································· 57

8. EXPLODED VIEWS

8-1. Main Section ····································································· 61
8-2. Panel Section ···································································· 62
8-3. Main Board Section ·························································· 63
8-4. Tape Mechanism Deck Section ········································ 64
8-5. CD Mechanism Deck Section (CDM58-K2BD37A) ······· 65
8-6. Base Unit Section (BU-K2BD37A) ································· 66

9. ELECTRICAL PARTS LIST ······································· 67

2

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.

3

SECTION 1

H

g

g

H

H

g

SERVICE NOTE

2

Panel board

Note for installing the panel board

Hot melt

Screw hole

1

Cut the eleven melted-connection points with a cutting plier.

Attach the panel board with
six screws (

+BVTP 2.6 × 8

)
after the board is removed once.
Do not tighten the screws excessively.

SELF-DIAGNOSIS

This model has the self-diagnosis function for the VIDEO and AUDIO decoder sections.
Connecting to the LED between TP522 and TP523 on the VIDEO BOARD.
Immediately after the power on, the self-diagnosis function searches each operation of IC’s around the mechanism control microcomputer
(IC701). and TP5
The results can be checked by LED of the VIDEO board.

Oscilloscope (Waveform) Symptom

No error

Li

ht

L

MPEG decoder (IC505)
error

2 time blinkin

L

[VIDEO BOARD] (SIDE A)

TP523 TP522

LED

IC505

91

90

65

64

100

1

32

33

MPEG decoder (IC505)
or

L

3 time blinkin

DRAM (IC507) error

4

SECTION 2

12345

6

7

qd
qf

qgqh

el

ed

r;

ef

wh

wj
wk

ea

8

qa
qs

9
q;

es

ej

qk qj

ws

wd

wf

wg

w;

ql

wa

ek

eg

eh

wl

e;

GENERAL

1 DISC SKIP EX-CHANGE button
2 DISC 1 button and indicator
3 DISC 2 button and indicator
4 DISC 3 button and indicator
5 Z OPEN/CLOSE button
6 PREV button
7 NEXT button
8 RETURN button
9 EDIT, TUNER MOMERY button
q; PLAY MODE, STEREO/MONO button
qa REPEAT, DOLBY NR button
qs DIRECTION button
qd VOLUME knob
qf PHONES jack
qg ENTER button
qh REC PAUSE/START button and indicator
qj CD SYNC HI-DUB button
qk KARAOKE PON/MPX button
ql MIC1, MIC2 jack
w; MIC LEVEL knob

wa ECHO LEVEL knob
ws EQ EDIT button
wd SPECTRUM button
wf DISPLAY button
wg ?/1 button and indicator
wh Function indicator
wj TUNER/BAND button
wk CINEMA SPACE button
wl MD (VIDEO) button
e; gG/SELECT button
ea > + button
es X button
ed – . button
ef x button
eg V-GROOVE button and indicator
eh PICTURE EFFECT button
ej CURSOL button and indicator
ek GROOVE button
el TAPE A/B button
r; CD button

5

This section is extracted from

7

Inserting two size AA (R6)

batteries into the remote

Using the remote

You can use the shaded buttons shown below

to operate a Sony TV.

To Press

Turn the TV on or off TV ?/1

Switch the TV's TV/VIDEO.

video input

Change the TV TV CH +/–.

channels

Adjusts the volume TV VOL +/–.

of the TV speaker(s)

Tip

With normal use, the batteries should last for about

six months. When the remote no longer operates

the system, replace both batteries with new ones.

Note

If you do not use the remote for a long period of

time, remove the batteries to avoid possible damage

from battery leakage.

When carrying this system

Do the following to protect the CD

mechanism.

1 Make sure that all discs are removed from

the unit.

2 Hold down CD and then press ?/1 so that

“LOCK” appears in the display.

3 Unplug the AC power cord.

1

Press CLOCK/TIMER SET.

The hour indication flashes.

2

Press . or > repeatedly to set

the hour.

Step 2: Setting the

time

You must set the time before using the timer

functions.

continued

NX x

xMm>.

nN

O

v

V

bB

X

1

3,5

2,4

TV ?/1

TV VOL +/

TV CH +/

TV/VIDEO

8

1

Press TUNER/BAND repeatedly

until the band you want appears in

the display.

Every time you press this button, the

band changes as follows:

FM y AM

Step 3: Presetting

radio stations

You can preset 20 stations for FM and 10

stations for AM.

?/1

(Power)

3

Press ENTER.

The minute indication flashes.

4

Press . or > repeatedly to set

the minute.

5

Press ENTER.

The clock starts working.

Tip

If you’ve made a mistake, start over from step 1.

To change the time

The previous explanation shows you how to set the

time while the power is off. To change the time

while the power is on, do the following:

1 Press CLOCK/TIMER SET.

2 Press . or > repeatedly to select

SET CLOCK.

3 Press ENTER.

4 Perform steps 2 through 5 above.

Note

The clock settings are canceled when you disconnect

the power cord or if a power failure occurs.

Step 2: Setting the time

(continued)

SHUTTLE

42

13

instruction manual.

6

SECTION 3

DISASSEMBLY

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

3-1. UPPER CASE (TOP)

5

Two screws (Case)

Side panel L

6

Screw (Case)

Upper case (Top)

7

Two screws

(+BVTP 3

×

8

10)

q;

9

Two screws (+BVTP 3

Claw

Side panel R

4

×

10)

3-2. LOADING PANEL ASSY

CD mechanism deck (CDM58)

1

Turn the pulley to the direction of arrow.

pulley

Front panel side

2

Pull-out the disc tray.

Loading panel assy

3

1

Two screws (Case)

2

Screw (Case)

3

Two screws

(+BVTP 3

×

10)

7

)

3-3. FRONT PANEL SECTION

)

CD mechanism deck (CDM58)

4

Screw (+BVTP 3

7

×

10)

qs

1

Flat type wire (CN304)

5

Screw (+BVTP 3

2

Connector (CN1)

8

Connector (CN201)

Connector
(CN601)

×

10)

0Tw o

screws (+BVTP 2.6

×

8

6

Three screws (+BVTT 3

3-4. TAPE MECHANISM DECK

×

9

3

Connector (CN2)

Front panel section

6)

4

Bracket (Heart cam L)

3

Screw (+BVTP 2.6

5

Five screws (+BVTP 2.6

Connector (CN202)

×

8)

×

8)

1

Screw (+BVTP 2.6

×

8

2

Bracket (Heart cam R)

6

Tape mechanism deck

8

d

)

3-5. PANEL BOARD

7

Knob(MIC)

6

Spring

2

Two screws

(+BVTP 2.6

×

8)

1

Knob (Volume)

4

Bracket (FR)

5

FR knob

3

Two bosses & four pins

0

Three claws

8

9

Three screws

(+BVTP 2.6

qa

CD Switch boar

qf

Panel board

qd

Five claws

qs

Cut the eleven melted-connection points with a cutting plier.

When attching the panel board,

Note:

refer to "Service Note" on page 4.

×

8)

3-6. TRANS BOARD

6

Connector (CN977)

7

Two screws (+BVTT 4

5

Connector (CN975)

0

Trans board

×

8)

9

Trans

8

Two screws

(+BVTT 4

×

4

Panel, back

2

Six screws

(+BVTP 3

8)

1

Two screws

(+BVTP 3

3

Connector (CN891)

×

10)

×

10

9

)

3-7. MAIN BOARD AND AMP BOARD

4

Three screws (+BVTP 3

×

8)

7

Heat sink

6

Two screws (+BVTP 3

×

8)

5Powe r

3

Two screws (+BVTP 3

AMP board

×

16)

Connector
(CN503)

Connector(CN502)

2

Main board

1

Two screws (+BVTP 3

×

8

3-8. LEAF SW BOARD, HEAD (A) BOARD AND HEAD (B) BOARD

1

Five claws

7

Remove the four solderings.

4

Head (A) board

5

3

Screw (+PS 2.6

×

5)

Head (B) board

2Leaf

SW board

10

6

Screw (+PS 2.6

×

5)

d

3-9. BASE UNIT

5

Two insulators

Base unit

3

4

Two insulators

1

Flat type wire (CN101)

2

Four screws (+PTPWH 2.6)

3-10. DRIVER BOARD, MOTOR BOARD SENSOR BOARD AND VIDEO BOARD

9

q;

Tray

3

Connector (CN701)

1

Screw (+BVTP 2.6

Screw (+PTPWH 2.6

qa

Screw (+BVTP 2.6

2

Driver board

×

8)

6

Motor board

×

×

8)

8)

4

Three screws (+BVTP 2.6

7

Flat type wire (CN721)

5

Remove the two solderings of motor.

8

Connector(CN722)

qs

Sensor board

×

8)

qd

Two screws (+BVTP 2.6

×

qf

Video boar

8)

11

SECTION 4

TEST MODE

[MC Cold Reset]

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

Procedure:

1. Press three buttons x , ENTER , and ?/1 simulta-neously.

2. The fluorescent indicator tube displays “COLD RESET” and

the set is reset.

[CD Ship Mode]

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

Procedure:

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

2. Press CD button and ?/1 button simultaneously.

3. After the "STANDBY" display blinks six times, a message

“LOCK” is displayed on the fluorescent indicator tube, and the
CD ship mode is set.

[MC Hot Reset]

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

Procedure:

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

2. The fluorescent indicator tube becomes blank instantaneously,

and the set is reset.

[CD Service Mode]

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

Procedure:

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

2. Select the function “CD”.

3. Press three buttons x , ENTER , and OPEN/CLOSE simul-

taneously.

4. The CD service mode is selected.

5. With the CD in stop status, turn the shuttle knob clockwise to

move the pickup to outside track, or turn the shuttle knob
counter-clockwise to inside track.

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

1) Move the pickup to the most inside track.

2) Press three buttons in the same manner as step 2.

Note: • Always move the pickup to most inside track when exiting from

this mode. Otherwise, a disc will not be unloaded.

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

[Change-over of MW Tuner Step between 9 kHz and
10 kHz]

• A step of MW 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 “MW”.

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 “MW 9 k STEP” or
“MW 10 k STEP”, and thus the channel step is changed over.

[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, VC version, CD version, CM
version, ST version, TC version, TA version, TM version and
BR 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

“KEY0 VOL0”. 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.

[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.

12

[MC Test Mode]

• This mode is used to check operations of the respective sections
of Amplifier, Tuner, CD and Tape.

Procedure:

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

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

simultaneously.

3. A message “TEST MODE” appears on the FL display tube.
4 When f (CURSOR UP) button is pressed, GEQ increases to

its maximum and a message “GEQ ALL MA” appears.

5. When F (CURSOR DOWN) button is pressed, GEQ decreases

to its minimum and a message “GEQ ALL M1” appears.

6. When g (CURSOR LEFT) or G (CURSOR RIGHT) button

is pressed, GEQ is set to flat and a message “GEQ FLAT”
appears.

7. 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.

8. 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.

9. 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, by operating the Shuttle
knob. (It means that the memory is cleared.)

10. When CD is selected and the EDIT button is pressed, the disc
that is being chucked at this moment becomes the default
setting. It means that the default disc only is accessed when
any other discs are selected even though the display indication
changes accordingly. At the same time, the DISC SKIP EX­CHANGE and OPEN/CLOSE cannot be accepted. (It means
that the tray motor and the turntable motor are disabled of their
operation.)

11. When a tape is inserted in Deck B and recording is started, the
input source function selects VIDEO automatically.

12. When x button is pressed to stop recording, the Tape (Deck)
B is selected and tape is rewound using the Shuttle knob, tape
is rewound, 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.

13. When the CD SYNC HI-DUB Button is press during playback
of Deck B, either normal speed or high speed can be selected
by this button.

14. Select the desired loop by pressing the PLAY MODE button.
Insert a test tape AMS-110A or AMS-RO to Deck A.

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

16. After a tape is rewound first, the FF AMS is checked, and the
mechanism is shut off after detecting the AMS signal twice.

17. Then the REW AMS is checked and the mechanism is shut off
after detecting the AMS signal twice.

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

19. When you want to exit this mode, press the ?/1 button twice.
The cold reset is enforced at the same time.

13

[Aging Mode]

This mode can be used for operation check of CD section and tape deck section.

• If an error occurred:
The aging operation stops and display status.

• If no error occurs:
The aging operation continues repeatedly.

1. Operating method of Aging Mode

Turn on the main power and select “CD” of the function.

1) Set a disc in DISC1 tray. Select ALL DISC CONTINUE, and REPEAT OFF.

2) Load the tapes recording use into the decks A and B respectively.

3) Press three buttons x , ENTER , and

DISC SKIP/EX-CHANGE simultaneously.

4) Aging operations of CD and tape are started at the same time.

5) To exit the aging mode, perform [MC Cold Reset].

3. Aging Mode in CD section

1) Display state

• No error occurs

Display

AGING[*][*][*][*]

Note:

[*][*][*][*]

Error display

E ** s ## $$ %%

12 34 5

1 **

2 s
3 ##

4 $$

5 %%

: Number of aging operations

The error No. 00 indicates the newest error. As the error No. increases, it means the older error.
When you want to retrieve the error history, press the PLAY MODE button in the case of mechanism error.
Or press the REPEAT button in the case of NO DISC error.

M: Mechanism error

Don’t care

High order digits only
D: Stopped during closing due to problems other than mechanism.
E: Stopped during opening due to problems other than mechanism.
C: Stopped during chucking due to problems other than mechanism.
F: Stopped during EX-opening due to problems other than mechanism.

Emergency related errors (High order digits only)
1: Stopped during chuck-up
2: Stopped during chuck-down
3: Time out by EX-OPEN
5: Time out by EX-CLOSE

D: No disc error

01: FOCUS ERROR
02: GFS ERROR
03: SETUP ERROR

01: NO DISC judgment without chucking retry
02: NO DISC judgment after chucking retry

Status at the time of NO DISC judgment
(High order digits only)
1: STOP
2: SETUP
3: TOC READ
4: ACCESS
5: PLAY BACK
6: PAUSE
7: MANUAL SEARCH (PLAY)
8: MANUAL SEARCH (PAUSE)

• When the buttons x , ENTER and DISC 1 are pressed simultaneously, number of time of the mechanism error and the NO DISC error
can be checked.
Display: EMC**EDC** **: Number of times of error (Maximum three times)

EMC: Mechanism error
EDC: NO DISC error

• When aging operation is complete, be sure to perform the MC Cold Reset to reset the error history.

14

2) Operation during aging mode
In the aging mode, the program is executed in the following
sequence.
(1) The disc tray opens and closes.
(2) The mechanism accesses DISC 2 and makes an attempt to

read TOC. However, since there are no discs, a message
“CD2 NO DISC” appears.

(3) The mechanism accesses DISC 3 and a message “CD3 NO

DISC” appears.
(4) The disc tray turns to select a disc1.
(5) A disc is chucked.
(6) TOC of disc is read.
(7) The pickup accesses to the track 1, and playing 2 seconds.
(8) The pickup accesses to the last track, and playing 2 seconds.
(9) Every time when an aging operation of step 1 to step 8 is

complete, the display “AGING[*][*][*][*]” value increases

as the number of aging operations is counted up.
(10) Returns to step 1.

3. Aging Mode in Tape Deck section

1) Display state

• No error occurs

Display action now

• Error occurred

Display action last time

NO. Display action Action contents Final timing

1 TAPE A AG-1 Rewind the TAPE A, B The top of tape

2 TAPE A AG-2 FWD play the TAPE A 2 minutes playing

3 TAPE A AG-3 F.F. the TAPE A 20 second FF or the end

4 TAPE A AG-4 REV play the TAPE A 2 minutes playing

5 TAPE A AG-5 Rewind the TAPE A The top of tape

6 TAPE B AG-2 FWD play the TAPE B 2 minutes playing

7 TAPE B AG-3 F.F. the TAPE B 20 second FF or the end

8 TAPE B AG-4 REV play the TAPE B 2 minutes playing

9 TAPE B AG-5 Rewind the TAPE B The top of tape

of tape

of tape

2) Operation during aging mode
In the aging mode, the program is executed in the following
sequence.
(1) Rewind is executed up to the top of tape A and B.
(2) A tape on FWD side is played for 2 minutes.
(3) FF is executed up to either made for 20 second or the end of

tape.

(4) A tape is reversed, and the tape on REV side is played for 2

minutes.
(5) Rewind is executed up to the top of tape.
(6) Returns to step 2, and repeat steps from 2 to 5.

[Function Change Mode]

* elect 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”.

15

VIDEO CD COLOR-BARS MODE

On this mode, the data of the color-bars signal as a picture signal and the 1kHz sine wave signal as a sound signal are output by the
mechanism control microcomputer (IC502) for video CD signal check. When measurement of the voltage and waveform on the VIDEO
board, perform it in this mode.
For reference, the color-bars signal can be observed at J302 (VIDEO OUT) and the sound signal can be observed at J101 (VIDEO/MD
(AUDIO) OUT) using an oscilloscope.

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

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

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

4. After measuring, remove the lead wire connected.

[VIDEO BOARD] (SIDE A)

SL501 SL502

TEST MODE

[VIDEO BOARD] (SIDE B)

SL503

CT503

VIDEO
FREQUENCY

IC505

IC507

16

TEST

MODE

SL503
SL502
SL501

IC502

SECTION 5

MECHANICAL ADJUSTMENTS

SECTION 6

ELECTRICAL ADJUSTMENTS

Precaution

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

swab:

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

2. Demagnetize the record/playback head with a head

demagnetizer.

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

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

parts adjusted.

5. The adjustments should be performed with the rated power

supply voltage unless otherwise noted.

Torque Measurement

Mode

FWD

FWD
back tension

REV

REV
back tension

FF/REW

FWD tension

REV tension

Torque meter

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-L300 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)

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

set

main board
CN301
Pin 2 (GND)

level meter

+
–

17

2. Turn the adjustment screw and check output peaks. If the peaks

(

)

r

(

)

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

Tape Speed Adjustment DECK B

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

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)

frequency counte

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

oscilloscope

V

wrong

H

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

Adjustment Location: Playback Head (Deck A).

Record/Playback/Erase Head (Deck B).

set

main board
CN301 (Pin 3 : L-CH)

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 do 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-L300
(315 Hz, 0 dB)

set

level meter

+

–

18

forward

reverse

main board
CN301 (Pin 3 : L-CH)

Pin 1 : R-CH

Deck A is RV302 (L-CH) and RV352 (R-CH), Deck B is RV303
(L-CH) and RV353 (R-CH) so that adjustment within adjustment
level as follows.

Adjustment Level:

CN301 PB level: 301.5 to 338.3 mV (–8.2 to –7.2 dB) level
difference between the channels: within ±0.5 dB

Adjustment Location: MAIN board

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

(WS-48B)

REC Bias Adjustment DECK B

(

)

set

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

blank tape
CS-123

600 Ω

attenuator

AF OSC

(

)

T601

RV611

RV351

RV354

RV304

RV303

RV352

RV302

RV353

RV301

CN301

CN304

CN302

CN303

13

REC LEVEL (L)

(B)

PB LEVEL (L)

(B)

PB LEVEL (R)

(A)

PB LEVEL (L)

(A)

PB LEVEL (R)

(B)

REC LEVEL (R)

(A)

REC LEVEL (L)

(A)

REC LEVEL (R)

(B)

Procedure:

INTRODUCTION
When set to the test mode performed in Tape Speed Adjustment,
when the tape is rewound after recording, the “REC memory mode”
which rewinds only the recorded portion and playback is set.
This “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will
automatically switch to VIDEO.
(If do not operation of stopped from recording complete, and rotette
of shuttle knob then rewind to recording start position.)

4. Mode: Record

5. Mode: Playback

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

1) 315 Hz

2) 10 kHz

AF OSC

attenuator



50 mV (–23.8 dB)




600 Ω

blank tape
CN-123

set

5. Mode: Playback

recorded
portion

set

CN301 (Pin 3 : L-CH)

level meter

+

–

Pin 1 : R-CH

recorded
portion

set

level meter

+

–

CN301 (Pin 3 : L-CH)

Pin 1 : R-CH

6. Confirm playback the signal recorded in step 3 become
adjustable level as follows.
If these levels do not adjustable level, adjustment the RV301
(L-CH) 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)

6. Confirm playback the signal recorded in step 3 become
adjustable level as follows.
If these levels do not adjustable level, adjustment the RV304
(L-CH) and RV354 (R-CH) on the AUDIO board to repeat steps
4 and 5.

Adjustable level: Playback output of 315 Hz to playback output

Adjustment Location: MAIN board

REC Level Adjustment

Procedure:

INTRODUCTION
When set to the test mode performed in Tape Speed Adjustment,
when the tape is rewound after recording, the “REC memory mode”
which rewinds only the recorded portion and playback is set.
This “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will
automatically switch to VIDEO.
(If do not operation of stopped from recording complete, and rotate
of shuttle knob then rewind to 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.

of 10 kHz: ±1.0 dB

DECK B

[LEAF SW BOARD] (Component Side)

TAPE SPEED





(NORMAL) (HIGH)

RV1002

RV1001

CN1001

19

FM Tuned Level Adjustment

FM RF SSG

75 Ω coaxial

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

set

FM ANTENNA terminal
(TM601)

CD SECTION

Note :

1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10MΩ impedance.

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

S-Curve Check

Procedure:

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

2. Tune the set to 98 MHz.

3. Adjust RV611 to the point (moment) when the TUNED
indicator will change from going off to going on.

Adjustment Location: MAIN board

Null Adjustment

FM RF SSG

75 Ω coaxial

set

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

FM ANTENNA terminal
(TM601)

Procedure:

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

2. Tune the set to 98 MHz.

3. Measure voltage between pin 21 of IC 601. Adjust T601 ubtil
the voltage becomes 0 V.

Oscilloscope

BD board

TP(FEO)
TP(VC)

Procedure :

1. Connect oscilloscope to TP (FEO).

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

3. Connect between TP (AGCCON) and TP (GND) by lead wire.

4. Turn Power switch on.

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

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

S-curve waveform

symmetry

A

within 4 ±1Vp-p

B

Adjustment Location: MAIN board

Adjustment Location

[MAIN BOARD] Component side

NULL

T601

RV611

FM TUNED LEVEL

CN301

RV351

7. After check, remove the lead wire connected in step 2 and 3.

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

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

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

RF Level Check

oscilloscope

BD board

TP(RF)
TP(VC)

Procedure :

CN304

13

RV301

RV303

RV352

RV302

RV353

CN302

CN303

RV304

RV354

1. Connect oscilloscope to TP (RF).

2. Connect between TP (AGCCON) and TP (GND) by lead wire.

3. Turned Power switch on.

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

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

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

20

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

r

clearly distinguished at the center of the waveform.

RF signal waveform

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

level : 1.45 ± 0.3Vp-p

E-F Balance (1 Track jump) Check

oscilloscope

BD board

TP (TEO)
TP (VC)

+

–

Procedure:

1. Connect oscilloscope to TP (TEO) and TP (VC) board.

2. Turned Power switch on.

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

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

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

1 track jump waveform

Center of
waveform

B

0V

level=1.3±0.6Vp-p

Specification level: x 100=less than ±22%

A
B

Symmetry

A (DC voltage)

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

RF PLL Free-run Frequency

Procedure :

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

BD board

TP (XPCK)

frequency counte

+

–

2. Turned Power switch on.

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

21

r

Adjustment Location :

[ BD BOARD ] — SIDE B —

TP

(RF)
TP
(VC)

TP
(AGCCON)

TP
(AGND)

TP
(IOP)

IC102

TP
(FEO)

TP
(TEO)

TP
(DGND)

VIDEO SECTION

Frequency adjustment

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

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

Adjustment Location :

[ VIDEO BOARD ] – SIDE A –

SL502

SL501

TEST MODE

SL503

CT503

VIDEO

FREQUENCY

IC505

(27MHz)

IC507

(GND)

frequency counte

VIDEO board
(27 MHz)

[ VIDEO BOARD ] – SIDE B –

SL503

TEST

MODE

SL502
SL501

IC502

+

–

22

SECTION 7
DIAGRAMS

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

Note on Schematic Diagram:

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

• All resistors are in Ω and 1/
specified.

f

•

• C : panel designation.

Note:

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

• U : B+ Line.

• V : B– Line.

• H : adjustment for repair.

• Voltages and waveforms are dc with respect to ground

• 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

EA : Saudi Arabia model
MY : Malaysia model
SP : Singapore model

4

W or less unless otherwise

Note on Printed Wiring Boards:

• X : parts extracted from the component side.

• b : Pattern from the side which enables seeing.

• Indication of transistor.

C

These are omitted.

Q

B

CE

These are omitted.

Q

B

HCD-VX99

7-1. CIRCUIT BOARD LOCATION

MOTOR Board

SENSOR Board

TRANS Board

E

CD SWITCH Board

PANEL Board

LEAF SW Board

HEAD (A) Board

HEAD (B) Board

DRIVER Board

VIDEO Board

BD Board

MAIN Board

POWER AMP Board

2323

HCD-VX99

Waveforms
– BD SECTION – – VIDEO SECTION –

1

1

IC101 t;

RFAC

IC502 qd

XOUT

7

IC509 ql

LRCK

– MAIN BOARD –

1

IC401 qa

STOP MODE

3

T301 4

TAPE B REC MODE

– PANEL BOARD –

1

IC601 oa

STOP MODE

2

IC101 ra

TE

APPROX 500mVp-p

3

IC101 el

FE

APPROX 200mVp-p

4

IC101 wg

MDP

7.5µsec

1.3Vp-p

2.6Vp-p

2.5V

2.5V

2

IC505 ug

COUT

3

IC505 yl

YOUT

4

IC304 9

COUT

10MHz

H

H

4Vp-p

44.1kHz

8

IC509 qj

BCK

1Vp-p

2.11MHz

9

IC504 8

384FS

2Vp-p

H

q;

27M

1Vp-p

33.8MHz

IC504 6

27MHz

4.6Vp-p

4.8Vp-p

4.8Vp-p

3.8Vp-p

32.768kHz

2

IC401 qd

STOP MODE

16MHz

3.0Vp-p

3.4Vp-p

80.7kHz

120Vp-p

12.5MHz

4.8Vp-p

5

IC304 qg

YOUT

6

IC509 1

XT1

2Vp-p

H

5.8Vp-p

27MHz

24

24

HCD-VX99

7-2. BLOCK DIAGRAMS

– TUNER/CD SECTION –

FM 75Ω

AM

G

TM601

8

ANT IN

1

3

RB641

FE602

IF OUT

F OUT

13

AM/FM IF MPX

1

FM IF

9

IF OUT

AM/IF

AM OSC

VCO STOP

8

IF REQ MUTE

AM RF IN

AM OSC

V REG

IC601

L OUT

R OUT

AM MIX OUT

FM SD ADJ

TUNED

STEREO

R-CH

RV611

BUFFER

Q611

IFT601

11

10

18AM IF IN

19

3

6

17

Q602

Q602

RF IF
AMP

10

1

24

15

18

17

19

FM

XIN

XOUT

FM OSC

VT1 IN

VT1

PD1

PLL

IC651

FM/AM IF

AM OSC

12

FM

7

14

2VCO STOP

8IF REQ

DO

6DO

DI

DI

4DI

CL

CE

CL

5

CE

3

12

24

13

20

22

23

1

3

VT

4

14

4

55

122

1511

67

9

CF601 CF602

+B A+12V

X651

4.5MHz

LPF601

LPF

L-CH

DO

DI

CL

CE

A

MAIN

SECTION

(Page 27)

MASTER CONTROL

24

TUNED

23

STEREO

22

ST MUTE

27

ST DIN

26

ST DOUT

28

ST CLK

25

ST CE

• RCH is omitted

• Signal Path

: FM

: CD

: DIGITAL OUT

: VIDEO

IC401(1/2)

OPTICAL PICK-UP

BLOCK

(KSS-213F)

VC

A

B

C

D

E

F

LD

GND

PD

VR

F+

FOCUS

09

COIL

TRACKING

COIL

F-

T+

T-

+5V

Q101

DRIVE

M102
SLED

MOTOR

M101

SPINDLE

MOTOR

DIGITAL SERVO

S101

RF AMP

IC103

12

VC

5

6

7

8

11

10

LD

3

4

MOTOR/COIL DRIVE

14

VO1 (+)

13

VO1 (–)

12

VO2 (+)

11

VO2 (–)

16

VO4 (–)

A

B

C

D

E

F

LD

PD

IC102

OPIN1 (+)

OPIN1 (–)

OPIN2 (+)

OPIN2 (–)

OPIN4 (–)

RFO

RFI

16

17

FE

14

TE

13

22LD ON

21HOLD SW

2

3

5

6

26

A+5V

LIMIT

SWITCH

M

15

18

VO4 (+)

VO3 (–)

OPIN4 (+)

OPIN3 (–)

27

23

DIGITAL SIGNAL PROC.

D/A CONV.

IC101

26

SSTP

50

RFAC

43

RFDC

39

FE

41

TE

40

SE

33

FFDR

34

FRDR

31

TFDR

32

TRDR

30

SRDR

29

SFDR

25

MDP

D OUT

PCMD

B CLK

L RCK

C2PO

DATA

XLAT

CLOK

SENS

S CLK

MUTE

XTSL

SCOR

SQSO

SQCK

XRST

XTAI

IC201

OPTICAL

A DATA

B CLK

L RCK

C2PO

DATA

XLT

CLK

SENS

S CLK

MUTE

CTRL1

SCOR

SUBQ

SQCK

XRST

MCK

DIGITAL

OUT

64

66

67

65

14

4

5

6

7

8

3

69

15

76

77

2

71

DIGITAL OUT

B

VIDEO

SECTION

(Page 26)

CD

IC701

9

MOTOR

DRIVE

7

TBL ADDRESS

4

2

IC711

SENSOR

OPEN/CLOSE

S701

S711

BU UP/

DOWN

M721

M

TURN

MOTOR

C

VIDEO

SECTION

2

I

C, DATA

2

C, CLK

I

XRST

BU UP/DOWN SW

30

IIC-DATA

29

IIC-CLK

43

XRST

MTR CNT2

T SENS

44

45MTR CNT1

49

46OPEN SW

47CLOSE SW

48

(Page 26)

M

17

VO3 (+)

STBY1

STBY2

9

20

LD ON

LPH

2525