Sony HCD-VX8 Schematic
HCD-VX8/VX8J
SERVICE MANUAL
HCD-VX8/VX8J is the tuner, deck, CD and
amplifier section in MHC-VX8/VX8J.
Photo: HCD-VX8 (SILVER)
Model Name Using Similar Mechanism HCD-GRX80/RXD8/RXD8S
CD
SECTION
TAPE DECK
SECTION
CD Mechanism Type CDM38L-5BD34L
Base Unit Type BU-5BD34L
Optical Pick-up Type KSS-213D/Q-NP
Model Name Using Similar Mechanism HCD-GRX80/RXD8/RXD8S
T ape Transport Mechanism T ype TCM-230AWR2/230PWR2
E Model
SPECIFICATIONS
— Continued on next page —
MICROFILM
COMPACT DISC DECK RECEIVER
– 1 –
MODEL IDENTIFICATION
— BACK PANEL —
Parts No.
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.
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.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK ! OR DO TTED LINE
WITH MARK ! 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.
PARTS No. MODEL
PRODUCT
COUNTRY
4-215-641-0π VX8: EA MALAYSIA
4-215-641-1π VX8: MY, SP MALAYSIA
4-215-641-2π VX8: TW MALAYSIA
4-215-641-3π VX8: E MALAYSIA
4-215-641-4π VX8: IA INDONESIA
4-215-641-5π VX8: HK MALAYSIA
4-215-641-6π VX8J: E JAPAN
4-215-641-7π VX8J: EA JAPAN
4-215-641-8π VX8: TH THAI
• Abbreviation
EA : Saudi Arabia model
TW : Taiwan model
IA : Indonesia model
HK : Hong Kong model
TH : Thai model
MY : Malaysia model
SP : Singapore model
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 DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output four times.
– 2 –
TABLE OF CONTENTS
1. SERVICING NOTE .......................................................... 4
2. GENERAL .......................................................................... 5
3. DISASSEMBLY
3-1. Loading Panel ....................................................................... 7
3-2. Front Panel and Video Board ................................................ 7
3-3. Cassette Lid and Tape Mechanism........................................ 8
3-4. CD SW Board and Panel Board............................................ 8
3-5. Disc Tray............................................................................... 9
4. SERVICE MODE ............................................................ 10
5. TEST MODE ..................................................................... 12
6. MECHANICAL ADJUSTMENTS ..........................13
7. ELECTRICAL ADJUSTMENTS ............................... 13
8. DIAGRAMS
8-1. Circuit Boards Location ...................................................... 18
8-2. Block Diagrams
• CD Section ....................................................................... 19
• Video Section................................................................... 21
• Deck Section .................................................................... 23
• Main Section .................................................................... 25
• Power Section .................................................................. 27
• Display Section ................................................................ 29
8-3. Printed Wiring Board – CD Section –................................. 33
8-4. Schematic Diagram – CD Section – ................................... 35
8-5. Schematic Diagram – Deck Section –................................. 37
8-6. Printed Wiring Board – Deck Section –.............................. 39
8-7. Printed Wiring Board – Video Section – ............................. 41
8-8. Schematic Diagram – Video (1/3) Section – ....................... 43
8-9. Schematic Diagram – Video (2/3) Section – ....................... 45
8-10. Schematic Diagram – Video (3/3) Section – .................... 47
8-11. Printed Wiring Board – Main Section – ........................... 49
8-12. Schematic Diagram – Main (1/4) Section – ..................... 51
8-13. Schematic Diagram – Main (2/4) Section – ..................... 53
8-14. Schematic Diagram – Main (3/4) Section – ..................... 55
8-15. Schematic Diagram – Main (4/4) Section – ..................... 57
8-16. Printed Wiring Board – Leaf SW Section – ..................... 59
8-17. Schematic Diagram – Leaf SW Section – ........................ 59
8-18. Printed Wiring Board – Panel Section – ........................... 61
8-19. Schematic Diagram – Panel (1/3) Section –..................... 63
8-20. Schematic Diagram – Panel (2/3) Section –..................... 65
8-21. Schematic Diagram – Panel (3/3) Section –..................... 67
8-22. Schematic Diagram – CD Motor Section –...................... 69
8-23. Printed Wiring Board – CD Motor Section – ................... 71
8-24. Schematic Diagram – Trans Section – ............................. 73
8-25. Printed Wiring Board – Trans Section –........................... 75
8-26. Schematic Diagram – Surround Section – ....................... 76
8-27. Printed Wiring Board – Surround Section –..................... 76
8-28. IC Block Diagrams ........................................................... 77
8-29. IC Pin Functions ............................................................... 80
9. EXPLODED VIEWS
9-1. Case Section........................................................................ 90
9-2. Chassis Section ................................................................... 91
9-3. Front Panel Section ............................................................. 92
9-4. CD Mechanism Deck Section-1 (CDM38L-5BD34L) ....... 93
9-5. CD Mechanism Deck Section-2 (CDM38L-5BD34L) ....... 94
9-6. Base Unit Section (BU-5BD34L) ....................................... 95
9-7. TC Mechanism Section-1 (TCM230AWR2/230PWR2) .... 96
9-8. TC Mechanism Section-2 (TCM230AWR2/230PWR2) .... 97
10. ELECTRICAL PARTS LIST .............................98
– 3 –
SECTION 1
SERVICING NOTE
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH
TURNS OFF
1
Remove the Case.
3
Pull-out the disc tray.
2
Turn the cam to the direction
of arrow.
NOTE FOR INSTALLATION (ROTARY ENCODER)
BU cam
Groove
Section A
Note:When attaching the BU cam,
engage the Rotary encoder
switch as shown in the figure.
Note:When attaching the Base unit, Insert the
section A into the groove of BU cam.
CD-TEXT
This unit is provided with a simple CD-TEXT display function.
The CD-TEXT contents of 20 tracks are displayed on the fluorescent display tube.
Since the function is simple, some special characters may not be displayed, or may be displayed as other characters.
– 4 –
SECTION 2
GENERAL
Front Panel
58
57
41
55
56
52
53
4849
43
4445
40 39
3233
54
51
37
64
63
62
61
60
42
38
35
34
59
50
4647
36
234 7561
8
9
10
11
13
14
12
18
16
1715
19
20
21
22
23
24
LOCATION OF PARTS AND CONTROLS
1 1/u (Power) button and indicator
2 DEMO (STANDBY) button
3 DISC 1 button and indicator
4 DISC 2 button and indicator
5 DISC 3 button and indicator
6 DISC SKIP/EX–CHANGE button
7 § (Eject) button
8 Disc tray
9 EDIT DIRECTION/TUNER MEMORY
button
10 PLAY MODE/DOLBY NR button
11 REPEAT/STEREO/MONO button
12 p button
13 ^ (CD) button and indicator
14 TUNER/BAND button
15 CD NON-STOP button and indicator
16 KARAOKE PON/MPX button
17 SYNC EQ button
18 SYNC BASS button
19 REC PAUSE/START button and
indicator
20 DBFB button
21 SURROUND button
22 HI DUB button
23 CD SYNC button
24 VOLUME knob
25 PHONES jack
26 ENTER/NEXT button
27 ) + button and indicator
28 JOG/0x) dial and indicator
29 GROOVE button and indicator
30 0 – button and indicator
31 AUTO BPM button and indicator
32 PAD B button and indicator
33 PAD A button and indicator
34 MIC 2 jack
35 MIC 1 jack
36 CD FLASH button
37 CD LOOP button
38 MIC LEVEL knob
39 JAM button and indicator
40 LEVEL button
41 MIX button
42 ECHO LEVEL knob
25
26
27
28
31 30 29
43 BEAT SPEED button
44 BEAT SELECT button
45 BEAT ON/OFF button and indicator
46 P FILE MEMORY button
47 GEQ CONTROL button
48 FILE SELECT
49 EFFECT button
50 NEXT button
51 PREV button
52 RETURN button
53 SELECT button
54 ( (TAPE B) button and indicator
55 9 (TAPE B) button and indicator
56 ( (TAPE A) button and indicator
57 9 (TAPE A) button and indicator
58 FUNCTION button
59 Remote sensor
60 DISPLAY button
61 SPECTRUM ANALYZER button
62 CLOCK/TIME SET button
63 TIMER SELECT button and indicator
64 Display Window
– 5 –
– 6 –
This section is extracted from
instruction manual.
SECTION 3
)
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
3-1. LOADING PANEL
Claws
3
Loading panel
2
Pull-out the disc tray.
1
Turn the cam to the direction
of arrow.
3-2. FRONT PANEL AND VIDEO BOARD
8
Flat type wire
2
Screw (BVTT 3x6)
6
Screw (BVTP 3x10)
0
Front panel
4
Screw (BVTT 3x6)
(CN304)
Lead wires
!¢
Screw (BVTP 3x8)
!™
Flat type wire
9
(CN303)
(CN503)
Flat type wire
5
Screw
(BVTP3x10)
7
Flat type wire
(CN501)
!∞
Video board
!¡
(CN501)
Lead wire
1
Screw (BVTT 3x6)
Flat type wire
!£
Two screws (BVTP 3x8)
3
Screw (BVTT 3x6
– 7 –
3-3. CASSETTE LID AND TAPE MECHANISM
6
T ension spring
4
Cassette holder (L)
assembly
2
Release
(Refer to order No.
3
Cassette holder (R)
assembly
1
)
Portion
B
1
Release
Portion
A
5
Tension spring
9
Tape mechanism
8
Three screws
(BVTP2.6x8)
Note for installation
Portion
Portion
B
7
T wo screws
(BVTP2.6x8)
A
3-4. CD SW BOARD AND PANEL BOARD
3
CD SW board
4
Knob (Jog)
6
Nut
7
Nut
5
Knob (Vol)
1
Three screws
(BVTP2.6x8)
2
Three screws
(BVTP2.6x8)
!™
Panel board
8
Flat type wire
(CN601)
9
Four screws
(BVTP2.6x8)
0
Five screws
(BVTP2.6x8)
!¡
Five screws
(BVTP2.6x8)
– 8 –
3-5. DISC TRAY
(Perform after removing the front panel.) Note:When installing the Disc tray, pull around the flat type wire to
3
Flat type wire (8 core)
4
Two claws
2
Pull-out the disc tray.
5
Remove the disc tray.
pass through the claw
Claw
A
A
and claw B, as shown in the figure.
Claw
B
1
Turn the cam the
direction of arrow.
– 9 –
SECTION 4
SERVICE 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 p , ENTER/NEXT , and 1/u simultaneously.
2. “COLD RESET” is displayed on the fluorescent display tube and reset is executed.
CD Delivery Mode
• This mode moves the optical pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair .
Procedure:
1. Press 1/u button to turn the set ON.
2. Press LOOP button and 1/u button simultaneously.
3. A message “LOCK” is displayed on the fluorescent indicator tube, and the CD delivery 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 po wer cord is plugged
in and out.
Procedure:
1. Press three buttons p , ENTER/NEXT , and DISC 1 simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously, and the set is reset.
Sled Servo Mode
• This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the pick-up.
Procedure:
1. Press 1/u button to turn the set ON.
2. Press three buttons p , ENTER/NEXT , and § simultaneously.
3. The Sled Servo mode is selected, if “CD” is blanking on the fluorescent indicator tube.
4. With the CD in stop status, When the ) + button is pressed the optical pick-up moves outside. When – 0 button is pressed , it mov es
inside.
5. To exit from this mode, perform as follows:
1) Move the optical pick-up to the most inside track.
2) Execute MC cold reset. (Press the three buttons p , ENTER/NEXT , and 1/u button simultaneously.)
Note:
• Always move the optical pick-up to most inside track when exiting from this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can be chipped.
Change-over of AM Tuner Step between 9kHz and 10kHz
• A step of AM channels can be changed over between 9kHz and 10kHz.
Procedure:
1. Press 1/u button to turn the set ON.
2. Select the function “TUNER”, and press TUNER/BAND button to select the BAND “AM”.
3. Press 1/u button to turn the set OFF.
4. Press ENTER/NEXT and 1/u buttons simultaneously , and the display of fluorescent indicator tube changes to “AM 9k STEP” or “AM
10k STEP”, and thus the channel step is changed over.
LED and Fluorescent Indicator Tube All Lit, Key Check Mode
Procedure:
1. Press three buttons p , ENTER/NEXT , and DISC 2 simultaneously.
2. LEDs and fluorescent indicator tube are all turned on.
Press DISC 2 button, and the key check mode is activated.
3. In the key check mode, the fluorescent indicator tube displays “K 0 V0 J0”. Each time a button is pressed, “K”value increases . Howe ver ,
once a button is pressed, it is no longer taken into account.
“J” Value increases like 1, 2, 3 ... if rotating 0 AMS ) knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “-” direction.
“V” Value increases like 1, 2, 3 ... if rotating VOLUME knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “-” direction.
4. To exit from this mode, press three buttons in the same manner as step 1, or disconnect the power cord.
– 10 –
AMS Test Mode
• This mode is used for checking the AMS operations of the tape deck.
JIG
7-819-039-12 Alignment tape, AMS-110A
Procedure:
1. Press the 1/u button to turn the unit ON.
2. Set the tape (AMS-110A).
3. Press the three buttons p , ENTER/NEXT , and DISC 3 button simultaneously.
4. “TEST MODE” is displayed on the fluorescent display tube.
5. Press the FUNCTION button and switch the function to the deck with the tape (AMS-110A).
6. Press the CD SYNC button. “AMS CHECK” is displayed on the fluorescent display tube and the tape is rewound.
7. AMS starts in the normal direction. If the AMS count is 2 at shut down, proceed to step 8.
“NG” is displayed at other times, and the deck stops.
8. AMS starts in the opposite direction. If the AMS count is 2 at shut down again, “OK” is displayed.
“NG” is displayed at other times.
Note:The p button of CD section will become effective and the aging of CD section will stop sometime, if the buttons described in step 3
are not pressed simultaneously. In that case, press ^ button and operate the CD section.
– 11 –
SECTION 5
TEST MODE
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 refernce, 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 FUNCTION 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)
D502
SL501
SL502
SL503
TEST MODE
IC505
[VIDEO BOARD] (SIDE B)
SL503
TEST
MODE
SL502
SL501
IC502
CT503
VIDEO
FREQUENCY
IC507
– 12 –
SECTION 6
MECHANICAL ADJUSTMENTS
SECTION 7
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
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
71 to 143 g • cm
(0.98 – 1.99 oz • inch)
100 g or more
(3.53 oz or more)
100 g or more
(3.53 oz or more)
DECK SECTION 0 dB=0.775V
1. Demagnetize the record/playback head with a head damagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
parts adjusted.
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 R-CH.
7. Switches and controls should be set as follows unless otherwise
specified.
Signal
P-4-A100
WS-48B
P-4-L300
10 kHz, –10 dB
3 kHz, 0 dB
315 Hz, 0 dB
Record/Playback Head Azimuth Adjustment
(Deck A, Deck B)
Note: Perform this adjustments for both decks.
Procedure:
1. Mode : Playback
Used forTape
Azimuth Adjustment
Tape Speed Adjustment
Level Adjustment
test tape
P-4-A100
(10kHz, –10dB)
set
MD OUT
level meter
+
–
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 1 dB of peak.
L-CH
peak
screw
position
R-CH
peak
output
level
within
1 dB
L-CH
peak
R-CH
peak
within 1dB
screw
position
– 13 –
3. Mode: Playback Tape Speed Adjustment (Deck A)
)
test tape
P-4-A100
(10kHz, –10dB)
oscilloscope
MD OUT
Note: Set the test mode using the following method and begin tape
speed adjustment.
In the test mode, the speed will switch to double speed or
normal speed each time the HI DUB button is pressed.
set
Waveform of oscilloscope
in phase 45
good
°
90
135
°
°
wrong
180
°
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location: Playback Head (Deck A)
Record/Playback/Erase Head (Deck B)
Procedure:
With the power turned ON, press the p button, ENTER/NEXT
button, and DISC 3 button simultaneously.
(The “CD TYPE INDICA T OR” on the fluorescent display tube will
blink while in the test mode.)
To exit the test mode, press the 1/u button.
1. Insert the WS-48B into deck B.
2. Press the ( button of deck B.
3. Press the HI DUB button and play the tape at double speed.
4. Adjust RV1001 of the LEAF SW board so that the reading of
the frequency counter becomes 6000 ± 180 Hz.
5. Press the HI DUB button and play the tape at normal speed.
6. Adjust RV1002 of the LEAF SW board so that the reading of
the frequency counter becomes 3000 ± 90 Hz.
Adjustment Location: LEAF SW board
Sample Value of Wow and flutter
W.RMS (JIS) less than 0.3%
(test tape: WS-48B)
Playback Level Adjustment (Deck A, Deck B)
Procedure:
Mode: Playback
Reverse Foward
test tape
P-4-L300
(315Hz, 0dB)
set
MD OUT
level meter
Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301
(L-CH) and RV401 (R-CH)
so that adjustment within the following adjustment level.
Adjustment level:
CN301 playback level: 301.5 to 338.3 mV (–8.2 to –7.2 dB)
level difference between the channels: within ± 0.5 dB
Adjustment Location: AUDIO board
Adjustment Location
[LEAF SW BOARD]
RV1001(High Speed)
RV1002(Normal Speed
RV1002 RV1001
– 14 –
Record Bias Adjustment (Deck B)
AF OSC
VIDEO (AUDIO) IN
315Hz 50 mV (–23.8 dB)
blank tape
CS-123
set
attenuator
600
Ω
IC301
Record Level (L CH)
RV301
CN303
RV351
Record Level (R CH)
56
43
42
29
28
15
14
1
Record Level Adjustment (Deck B)
Procedure:
INTRODUCTION
When set to the test mode performed in Tape Speed Adjustment, when the tape is r ewound 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.
(After recording, press the – 0 button without stopping will
return to the position where recording was started.)
1. Press FUNCTION 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, press the r REC button, and then
press the ( button to start recording.
3. Mode: Record
VIDEO (AUDIO) IN
1) 315 Hz
2) 10 kHz
AF OSC
attenuator
600
Ω
} 50 mV (–23.8 dB)
blank tape
CS-123
set
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.
(After recording, press the – 0 button without stopping will
return to the position where recording was started.)
1. Press FUNCTION button to select VIDEO 1. (This step is not
necessary if the above test mode has already been set.)
2. Insert a tape into deck B, press the r REC button, and then
press the ( button to start recording.
3. Mode: Record
4. Mode: Playback
5. Confirm playback the signal recorded in step 2 become adjust-
Adjustment level: The playback output of 10 kHz lev el dif ference
Adjustment Location: AUDIO board
Adjustment Location:
[AUDIO BOARD] (Conductor Side)
recorded
position
set
MD OUT
level meter
ment level as follows.
If these levels do not adjustment lev el, adjust the R V341 (L-CH)
and R V441 (R-CH) on the A UDIO board to repeat steps 3 and 4.
against 315 Hz reference should be ± 1.0 dB.
RV341(Lch),RV441(Rch)
Record Bias
RV311(Lch),RV411(Rch)
Playback Level (Deck A)
4. Mode: Playback
recorded
position
set
MD OUT
level meter
5. Confirm playback the signal recorded in step 2 become adjustment level as follows.
If these levels do not adjustment lev el, adjust the R V301 (L-CH)
and R V351 (R-CH) on the MAIN board to repeat steps 3 and 4.
Adjustment level:
CN403 playback level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
[MAIN BOARD] (Conductor Side)
RV301 RV401
RV441 RV341
RV301(Lch),RV401(Rch)
Playback Level (Deck B)
RV311
RV411
– 15 –
CD SECTION
Note:
1. CD Block is basically constructed 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.
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 : 1.75 ± 0.25 Vp-p
S Curve Check
oscilloscope
BD board
TP (FE)
TP (VC)
+
–
Adjustment Location: BD board
Procedure :
1. Connect the oscilloscope to test points TP (FE) and TP (VC).
2. Connect TP (FEI) and GND, and TP (AGCCON) and GND of
the BD board with lead wires.
3. Press the 1/u button to turn the set ON.
4. With the disc (YEDS-18) loaded, press the ^ button and
perform focus search. (Focus search will be performed in the
same way even while the disc table is pushed in and out.)
5. Check the symmetry and peak to peak level of the oscilloscope
waveform (S curve) at this time.
S-curve waveform
symmetry
A
Within 4.0
B
±
1.0 Vp-p
6. 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.
• Tak e sweep time as long as possible and light up the brightness to obtain best waveform.
Adjustment Location: BD board
E-F Balance (Traverse) Check
oscilloscope
BD board
TP (TE)
TP (VC)
+
–
Adjustment Location: BD board
Procedure :
1. Connect oscilloscpe to test point TP (TE) on BD board.
2. Short-circuit SL502 of the video board to GND.
3. Turned Power switch on. Press FUNCTION button to select
CD.
4. Put disc (YEDS-18) in to play the number five track.
5. Press the PLAY MODE/DOLBY NR button. (The tracking
servo and the sledding servo are turned OFF.)
6. Check the le vel B of the oscilliscope's w av eform and the A (DC
voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%
Traverse waveform
Center of the waveform
B
0V
level : 1.3 ± 0.6 Vp-p
A (DC voltage)
7. Press the PLAY MODE/DOLBY NR button. (The tracking
servo and sledding servo are turned ON.) Confirm the C (DC
voltage) is almost equal to the A (DC voltage) is step 7.
RF Level Check
oscilloscope
BD board
TP (RF)
TP (VC)
+
–
Procedure :
1. Connect oscilloscope to test point TP (RF) and TP (VC) on BD
board.
2. Connect TP (AGCCON) and GND of the BD board with lead
wires.
3. Press the 1/u button to turn the set ON.
4. Put disc (YEDS-18) in and playback 5track.
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.
Traverse waveform
0V
Tracking servo
Sled servo
OFF
8. Desolder the short-land (SL502) short-circuited at step 2.
Adjustment Location: BD board
– 16 –
C (DC
voltage)
Tracking servo
Sled servo
ON
Adjustment Location :
[ BD BOARD ] — SIDE B —
TP
(RF)
TP
(VC)
TP
TP
(TE)
TP
(AGCCON)
(FE)
TP
(IOP)
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 –
D502
SL502
SL501
TEST MODE
SL503
CT503
VIDEO
FREQUENCY
IC505
(27MHz)
IC507
(GND)
frequency counter
VIDEO board
(29 MHz)
[ VIDEO BOARD ] – SIDE B –
TEST
MODE
SL503
SL502
SL501
(27MHz)
(GND)
IC502
IC506
+
–
– 17 –
8-1. CIRCUIT BOARDS LOCATION
CD SW board
PANEL board
SECTION 8
DIAGRAMS
VIDEO board
ENCAPSULATED COMPONENT
(EXCEPT THAI)
TUNER unit
(THAI)
TRANS board
SURROUND board
MAIN board
SENSOR board
LEAF SW board
ENCAPSULATED COMPONENT/TUNER
unit is supplied as the assembled block.
MOTOR (TURN) board
CONNECTOR board
BD board
MOTOR (SLIDE) board
AUDIO board
– 18 –
8-2. BLOCK DIAGRAMS
– CD SECTION –
OPTICAL PICK-UP BLOCK
(D/Q-Np)
DETECTOR
E
A
C
D
B
F
VCC
VC
A
C
D
B
HCD-VX8/VX8J
IC381
CD DIGITAL
IC101
IC103
RF AMP
A
5
C
7
D
8
B
6
RF
SUMMING
AMP
FOCUS
ERROR
AMP
RF EQ
AMP
RFD
RFI
FE
16
17
14
INTEGRATOR
DIGITAL SERVO
DIGITAL SIGNAL PRCESSOR
RF AC
50
ASYI
49
ASYO
48
ASYMMETRY
CORRECTION
DEMODULATOR
DIGITAL
PLL
EFM
32K
RAM
REGISTER
SUB CODE
PROCESSOR
DATA BUS
ERROR
CORRECTOR
D/A
INTERFACE
DIGITAL
OUT
MD2
D OUT
PCM-D
BCLK
LRCK
C2PO
MUTE
63
D+5V
64
66
67
65
14
3
OPTICAL
1
OUT
DOUT
ADATA
BCLK
LRCK
C2PO
MUTE
LD
PD
TRACKING
FOCUS
COIL
COIL
LASER
DIODE
LD
POWER
M102
SLED
MOTOR
M101
SPINDLE
MOTOR
E
F
LD
DRIVE
Q101
T+
T
F+
F
SD+
M
SD
SP+
M
SP
E
11
F
10
LD
3
PD
4
FOCUS/TRACKING COIL DRIVE
SPINDLE/SLED MOTOR DRIVE
12
11
14
13
17
18
15
16
IC102
APC LD
AMP
TRACKING
ERROR
AMP
5
6
2
3
24
23
25
27
TFDR
TRDR
FFDR
FRDR
SFDR
SRDR
BUFFER
21
VC
VC
REF
LD ON
TE
13
DIGITAL
CLV
IC104
4
A+5V
(XTAL 33.8MHz)
MCK
2
CTRL1
SENS
DATA
XLT
CLK
SCOR
SUBQ
SQCK
SCLK
LPH
XRST
LD ON
• SIGNAL PATH
: CD
: Digital out
: VIDEO
A
VIDEO
SECTION
(Page 21)
CLOCK
12
VC
38
INTEGRATOR
VC
RFDC
43
FE
39
TE
41
CE
42
VC
SE
40
TFDR
31
TRDR
32
FFDR
33
FRDR
34
SFDR
29
SRDR
30
MDP
25
OP AMP
ANALOG SW
PWM
GENERATOR
TRACKING
PWM
GENERATOR
FOCUS
PWM
GENERATOR
SLED
PWM
GENERATOR
CONVERTER
22
A/D
CONTROL SIGNAL
BLOCK
SERVO
BLOCK
SERVO DSP
TRACKING
SERVO
FOCUS
SERVO
SLED
SERVO
DETECTOR
MIRR
DFCT
FOK
GENERATOR
SERVO
AUTO
SEQUENCER
SERVO
INTERFACE
CPU
INTERFACE
XTAI
XTSL
SENS
DATA
XLAT
CLOK
SCOR
SQSO
SQCK
S STOP
SCLK
XRST
71
69
7
4
5
6
15
76
77
26
S101
LIMIT SW
8
82
MUTE
M701
TURN
M
MOTOR
M801
SLIDE
MOTOR
09
8
8
8
M
8
– 19 –
MOTOR DRIVER
OUT1
OUT2
MOTOR DRIVER
OUT2
OUT1
TURN
IC701
SLIDE
IC801
IN2
RIN
FIN
IN1
8
8
8
8
– 20 –
S801
OPEN/CLOSE
DET
TABLE
SENSOR
IC702
DISC
SENSOR
IC703
ROTARY
ENCODER
S811
Q701
T. SENS
DISC SENS
ENC 1
ENC 2
ENC 3
OPEN
TBL.L
TBL.R
LOAD IN
LOAD OUT
C
MAIN
SECTION
(Page 25
XRST
20
HCD-VX8/VX8J
– VIDEO SECTION –
ADATA
BCLK
LRCK
C2P0
A
CD
SECTION
(Page 20)
DATA
XLT
CLK
SENS
SCLK
MUTE
CTRL1
LDON
SCOR
SUBQ
SQCK
(XTAL 33.8MHz)
09
XRST
MCK
1
13
5
LEVEL SHIFT
IC501
DATAI
DATAO
CLK1
HRDY
INT
HSEL
RST
CLK1, DATA0
DATA0
DATAI
CLK1
INT
HSEL
HRDY
RESET
4
10
8
INVERTER
Q502
RAS
13 14 28 29
38 42 40
MWE WE
RASO
4
CD-DATA
3
CD-BCK
CD-LRCK
5
6
CD-C2P0
112
HD-OUT
119
HD-IN
117
HCK
HRDY
113
114
HINT
121
HSEL
60
RESET
PGIO2/VSYNC/CSYNC
93
31
DATA1O
32
DATA1I
33
CLK1
CL680 INT
20
21
CL680 HSEL
23
CL680 HRDY
24
680 RESET
45
BUS
DSP DATA
3
DSP LATCH
4
5
DSP CLK
1
SENSE
SENSE CLK
2
10
DSP MUTE
11
CTRL1(L:DOUBLE)
27
CTRL2
28
LDON
18
SCOR
36
SUBQ DATA
SUBQ CLK
37
DEVICE RESET
77
UCAS
LCAS
CAS
D-RAM
IC507
A0
16 - 19 22 - 26
MECHA. CONTROL
A8
IC502
DQ1
2 - 10 31 - 39
DQ16
VIDEO/CD DECODER
SHARPNESS
DF LATCH
A7
XIN
XOUT
NT/PAL
TEST LED
P.ON
XRESET
DSENS
U to I
2
I
C.CLK
2
I
C.DATA
O0
13 - 15 17 - 21
IC505
34
22
65
15
13
93
73
38
12
19
72
29
30
ROM
IC506
O7
A11
25 4 28 29 3 2 14 10 12 - 5 27 26 23
10 - 29
I
MD0
MD15
X501
10MHz
+5V
D502
S501
SYSTEM
SELECT
2
14
C.DATA
I
2
13
C.CLK
I
9
I to U
U to I
10
TXD
11
12
RXD
INTERFACE
IC402
RESET
XOUT
A17
NTSC
AUTO
PAL
XIN
A0
18
19
20
58 - 44
I
MA0
DA-LRCK
A10
CE
22
37
MCE
MA10
Y-OUT
C-OUT
DA-DATA
DA-BCK
VCK-IN
DA-XCLK
X401
8MHz
OUTPUT AMP
IC401
69
75
110
108
111
106
86
BUFFER
Q301
27MHz
TRAP
Q302,306,307
BUFFER
Q303,304
DATA0
CLK1
MIX AMP
Q308,310
DIGITAL FILTER & D/A CONVERTER
18
19
17
9
8
7
D/A
CONV
MODE
10 21 20 4
RSTB
IC509
5
3
PLM
CLOCK
DIVIDER
11
3
1
7
1
14
11
1
24
MUTE
Q454
R-CH
X503
27MHz
FREQUENCY
LEVEL SHIFT
IC504
CT503
VIDEO
MUTE
Q453
6
8
12
AMP
IC101
27MHz
384FS
768FS
4
132
13
L - CH
XRST
–5V/IIC DATA
P. ON/IIC. CLK
J302
VIDEO OUT
J301
S VIDEO
OUT
C
MAIN
SECTION
(Page 25)
E
MAIN
SECTION
(Page 26)
3.3V REG
Q531
+3.3VD5V
• R CH: Same as L ch
• SIGNAL PATH
: CD
: CHROMA
:Y
: VIDEO
– 21 –
– 22 –
– DECK SECTION –
HCD-VX8/VX8J
HP101
PB HEAD
(DECK A)
REC/PB HEAD
(DECK B)
HRPE101
ERASE HEAD
PB A/B
MS OUT
MAIN SECTION
PB L
LM ON/OFF
NORM/HIGH
NR ON/OFF
REC/PB/PASS
REC L
BIAS ON/OFF
RM ON/OFF
ALC ON/OFF
RELAY
CAPM CNT1
CAPM CNT2
CAP M H / L
A SHUT
B
MAIN
SECTION
(Page 25)
17
2
DOLBY NR
RECOUT
C
32 33
S1008
B CrO
19
B 120/70
PAS
BIAS SW
M
2
DOL
DOLBY
TYPE B
M1
CAPSTAN
MOTOR
28
27
M
MS
26
PB OUT
LM ON/
OFF
NORM/
HIGH
NR ON/
OFF
PB
RIN
BIAS ON/OFF
RM ON/OFF
ALC ON/OFF
CAP MOTOR
CONTROL
Q336-343
CONTROL
RV1002
NORMAL
SPEED
SPEED
Q1001
40
25
18
23
24
44
20
22
15
RV1001
HIGH
SPEED
SWITCH
Q335
REEL
DETECT
IC1001
S1004
A CrO
RV311
4
PLAYBACK
LEVEL
DECK A
RV301
PLAYBACK
LEVEL
DECK B
RV341
REC
BIAS
REC BIAS
BIAS OSC
T621, Q621, 622
IC611
L
R
L
R
X
R CH
R CH
3
P
ERASE BIAS
IC601
1
IC602
R
REC/PB
16
PB-A/B
A IN
48
B IN
46
REC LEVEL
+7.5V
Q623
EQIN
38
EQOUT
36
RV301
A 120/70
70
120
DOLBY NR
IC301
39
REEL
DETECT
IC1002
S1001 (A PLAY)
• R CH : Same as L ch
• SIGNAL PATH
+5V
S1002 (B PLAY)
: PB (DECK A)
: PB (DECK B)
: REC (DECK B)
09
• PLUNGER SOLENOID is supplied
as the MECHANICAL BLOCK ASSY.
A DECK/
B DECK
PLUNGER
MAIN SECTION
TRIGGER
MOTOR
CONTROL
Q331-334
S1003
(A HALF)
S1005
(REC A)
S1006
(B HALF)
S1009
(REC B)
+5V
+5V
B SHUT
A PLAY
B PLAY
A HALF
B HALF/REC A/REC B
B TRIG
A TRIG
– 23 –
– 24 –
HCD-VX8/VX8J
– MAIN SECTION –
(Page 30)
DISPLAY
SECTION
F
VIDEO/IN
(AUDIO)
L
MD IN L
MD/VIDEO
(AUDIO)
OUT L
B
DECK
SECTION
(Page 24)
FM/AM TUNER
TUNER UNIT IS
SUPPLED AS THE
ASSEMBLED
BLOCK
J101
B HALF/REC A/REC B
NORM/HIGH
BIAS ON/OFF
RM ON/OFF
NR ON/OFF
REC/PB PASS
CAPM CNT1
CAPM CNT2
ALC ON/OFF
LM ON/OFF
CAP M H/L
MS OUT
RDS DATA
TRAY SENS
C
CD
SECTION
(Page 20)
09
DISC SENS
OUT-OPEN
DJ-SIG
DJ-MUTE
PB L
REC L
RELAY
A SHUT
B SHUT
A HALF
A PLAY
B PLAY
PB A / B
A TRG
B TRG
ST L
RDS INT
ST-DOUT
ST-DIN
STEREO
TUNED
ST CE
ST-MUTE
ST-CLK
L CH
TBL. L
TBL. R
SCOR
HOLD
SENS
X RST
CD CLK
CD DATA
SQ CLK
SQ DATA
X LAT
ENC-1
ENC-2
ENC-3
LD IN
LD OUT
J711
MIX
MIC
IC712(1/2)
RV712
MIC
LEVEL
EA
ECHO PROCESSOR
IC711
29
LPF 1 IN LPF 2 OUT
ECHO
LEVEL
R-CH
IC712(2/2)
IC181(1/2)
V
68
MD
69
TC
66
TU
67
CD
65
MUTE
Q181
SELECT
SWITCH
MICON
INTERFACE
34
33 32
1 2 3
IC181(2/2)
230
R-CH
EQ
IC101(1/2)
EQ
AMP
58
57
60
59
SPE SIG
WAKE UP
STANDBY LED
IIC DATA
VOLUME
IC101(2/2)
Lch
42
IC1201
SURROUND
L-OUT
L-IN
L+R
L-R
1
2
3
1411
3
40
L+R/L-R
100
TC RELAY
A SHUT
91
91
90
B SHUT
89
B HALF
88
A HALF
87
A PLAY SW
86
B PLAY SW
84
PB A/B
83
EQ H//N
BIAS
82
81
REC MUTE
80
NR ON/OFF
R/PB PASS
79
CAPM CNT1
75
CAPM CNT2
74
85
ALC
TC MUTE
78
76
CAP M H/L
73
A TRG
72
B TRG
77
AMS IN
38
493-LAT
47
493-DATA
48
493-CLK
ST DIN
54
50
STEREO
TUNED
51
52
ST CE
49
ST MUTE
53
ST DOUT
ST CLK
55
63
TBL L
65
TBL R
SCOR
19
T SENS
61
HOLD
57
SENS
56
XRST
59
CD CLK
37
CD DATA
35
DISC SENS
60
SQ CLK
33
SQ DATA
32
XLT
58
OUT OPEN
71
ENC1
70
ENC2/DISC-LED
69
ENC3/UP-SW
68
LOAD IN
67
LOAD OUT
66
21
RDS DATA
RDS INT
20
41
38 39
DBFB
SWITCH
Q111,112
ST-BY LED/CLOCK OUT
MASTER CONTROL
IC501
STBY RELAY
36
72
37
Q201
BASS FRQ.
DBFB H/L
LINE MUTE
F RELAY
WAKE UP
IIC DATA
IIC CLK
TIMER LED
RESET
AC CUT
(CHECK)
X-OUT
X-IN
XC-IN
XC-OUT
RY-SW
POWER
CD POWER
FL SW
STK MUTE
PROTECTOR
Lch
MUTE
Q113
MUTE
Q191
44
7
6
3
18
39
30
29
26
12
22
D503
13
15
10
11
36
2
5
42
43
1
27
RESET
SWITCH
Q501
3
RESET
IC502
1
+5.6V
X613
16MHz
X601
32.768KHz
MUTE SW
Q509
MUTE SW
Q508
MUTE
Q192
J191
SUPER
WOOFER
IIC CLK
TIMER LED
RESET
FRONT
DBFB
F RELAY
RY-SW
POWER ON/OFF
CD POWER
STK MUTE
PROTECTOR
E
DISPLAY
SECTION
(Page 29)
D
POWER
SECTION
(Page 27)
• R CH: Same as L ch
• SIGNAL PATH
: FM
: CD
: PB
: REC
: VIDEO/MD
• Abbreviation
EA : Saudi Arabia model.
– 25 –
– 26 –
– POWER SECTION –
D
MAIN
SECTION
(Page 26)
09
F RELAY
FRONT
VH+
DBFB
STK MUTE
RY-SW
PROTECTOR
POWER ON/OFF
CD POWER
CD D+5V (SW)
CD A+5V (SW)
D+5V UNSW
VH+ SUPP
Q803, 881
RECTIFIER
+5.6V (STBY)
+5V (STBY)
(DISPLAY)
+5V REG
Q907
SWITCH
Q908
D507
D509
Lch
RECTIFIER
POWER AMP
IC801
18 14
16
MUTE
SWITCH
Q804
D925
+5V OUT
Q911
SWITCH
Q912
THERMAL
Q831, 832
OVER LOAD
Rch
JW51
RDS D+5V UN SW
+5V (LED)
(DISPLAY)
D+5VSW
SWITCH
Q904
SWITCH
Q923, 903
IC904
3 1
REG
ST+10V
DET
THP831
Lch
DET
Q801
MUTE
SWITCH
Q412, 411
RECTIFIER
D922
RECTIFIER
D924
+5V OUT
Q905,D923
A+7V
A–7V
CD MOTOR +7V
TC MOTOR +12V
+10V REG
Q909
Rch
VH+
Rch
IC902
3 1
REG
+7V REG
Q901,902,913
–7V REG
Q951,952,914
IC901
3 1
+7V REG
IC903
3 1
+12V REG
RY401
PROTECT
CONTROL
Q432 - 434
+VH
–VH
+VL
–VL
Q435, 436, 431
RECT
D831
RECT
D832
RECT
D901-904
RECT
D907-910
RELAY
DRIVE
SWITCH
Q437
POWER TRANSFORMER
AC1
AC2
AC2
AC1
AC3
AC3
AC4
AC4
VF
VF
MUTE
SWITCH
Q439
T951
E,EA,MY,SP,HK,TW,IA
VOLTAGE
SELECTOR
S951
Rch
FAN MOTOR
DRIVER
Q401, 402
FRONT
Rch
UNREG
–7V
M
J701
PHONES
AC
IN
TM402
SURROUND
SPEAKER
M901
FAN
MOTOR
TM401
FRONT
SPEAKER
HCD-VX8/VX8J
• R CH : Same as L ch
• SIGNAL PATH
: FM
• Abbreviation
: Saudi Arabia model.
EA
: Singapore model.
SP
: Malaysia model.
MY
: Hong Kong model.
HK
: Taiwan model.
TW
: Indonesia model.
IA
– 27 –
– 28 –
HCD-VX8/VX8J
– DISPLAY SECTION –
IIC DATA
IIC CLK
RESET
WAKE UP
E
MAIN
SECTION
(Page 26)
X601
12.5MHz
2
C DATA
I
78
2
I
C CLK
79
73
RESET
XOUT
72
XIN
70
22
GRADATION R/WAKE UP
VF
DISPLAY CONTROL
SEG1-SEG22
GR2-GR12
33 - 40, 42 - 4446 - 67
FLUORESCENT INDICATOR TUBE
IC601
FL601
GRADATION L
L/P SCK
LED LA
L/P DAT
L SEL
SIRCS
S LOW (F01)
BPF1 (F02)
ALL B (L+R)
JOG A
JOG B
Busy for PAD
PAD LA
CH for PAD
GR1, GR13-GR18
27 - 32, 45
IND BUFF
Q610-616
BPF2
BPF3
BPF4
KEY 0
KEY 3
VOL A
VOL B
RIGHT
D637
LED SWITCH
Q607
15
IC604
3
4
5
7
1
16
17
18
19
20
21
2
8
11
14
75
6
74
9
10
13
LED
SWITCH
15
ROTARY
ENCODER
S602
VOLUME
VF
LED SWITCH
Q608
1
|
5
•
7
|
11
•
17
•
19
|
23
LED
CONTROL
Q603
REMOTE
CONTROL
RECEIVER
IC602
S601
(JOG)
ROTARY
ENCODER
KEY
MATRIX
PANEL LED
D638
LEFT
Q601,602
+5V (LED)
+5V (LED)
SOUND MIX
IC605
SD
15
SI
14
ST
8
CH
16
BUSY
20
XT XT
23
X602
4.09MHz
A.OUT
MUTE
SWITCH
Q851
23
DJ MUTE
DJ SIG
F
MAIN
SECTION
(Page 25)
SPEANA BPF FILTER
IC603
S LOW
17
F01
BPF1
F02
16
F04
F05
F06
L+R
BPF2
14
BPF3
13
BPF4
12
ALLB
11
– 30 –
D804
ECO
D635
TIMER SELECT
4
6
LINE IN
REC IN
+5V (LED)
SPE SIG
STANDBY LED
TIMER LED
09
LED SWITCH
Q605
– 29 –
HCD-VX8/VX8J
4Vp-p
10MHz
d
H
1Vp-p
H
1Vp-p
2Vp-p
H
2Vp-p
H
H
1.2
Vp-p
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• 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.
¢
•
: internal component.
• 2 : nonflammable resistor.
• 1 : fusible resistor.
• C : panel designation.
Note: The components identified by mark ! or dotted line
with mark ! 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
under no-signal (detuned) conditions.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F : FM
g : VIDEO/MD
E : PB (DECK A)
d : PB (DECK B)
G : REC (DECK B)
m : CHROMA
n : Y
o : VIDEO
J : CD
c : digital out
• Abbreviation
EA : Saudi Arabia model.
SP : Singapore model.
MY : Malaysia model.
HK : Hong Kong model.
TW : Taiwan model.
IA : Indonesian model.
TH : Thai model.
4
W or less unless otherwise
WAVEFORMS
– CD SECTION –
1
IC101 %º RFAC
2
APPROX 500mVp-p
IC101 $¡ TE
3
APPROX 200mVp-p
IC101 #ª FE
4
7.5µsec
IC101 @∞ MDP
1.3Vp-p
2.6Vp-p
2.5V
2.5V
– VIDEO SECTION –
1
IC502 !£ XOUT
2
IC505 &∞ COUT
3
IC505 ^ª Y OUT
4
IC401 7 COUT
5
IC401 1 Y OUT
6
J302 VOUT
7
8
9
0
!¡
!™
27MHz
IC509 1 XT1
44.1kHz
IC509 !ª LRCK
2.11MHz
IC509 !¶ BCLK
33.8MHz
IC504 8 384FS
27MHz
IC504 6 27M
33.8MHz
IC504 !™
5.8Vp-p
4.6Vp-p
4.8Vp-p
4.8Vp-p
3.8Vp-p
2.8Vp-p
– MAIN (3/4) SECTION –
1
5.2Vp-p
32.768kHz
IC501 !¡ XC-OUT
2
5.5Vp-p
16MHz
IC501 !£ X-OUT
– PANEL (2/3) SECTION –
1
3.4Vp-p
12.5MHz
IC601 &™ X OUT
2
3.6Vp-p
4.09MHz
IC605 2 XT
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• p : parts mounted on the conductor side.
®
•
: Through hole.
• b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B) pattern face are indicated.
Parts face side: Parts on the parts f ace side seen from the
(Side A) parts face are indicated.
• Indication of transistor
C
Q
These are omitte
EB
C
EB
These are omitted
– 31 – – 32 –
HCD-VX8/VX8J
(Page 42)
8-3. PRINTED WIRING BOARD – CD SECTION –
• See page 18 for Circuit Boards Location.
– 33 –
– 34 –
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