Sony HCD-VX3A Service manual
HCD-VX3A
SERVICE MANUAL
HCD-VX3A is the Amplifier, CD player,
T ape Deck and T uner section in MHC-VX3.
Manufactured under license from Dolby Laboratories
Licensing Corporation.
“DOLBY” and the double-D symbol a are trademarks
of Dolby Laboratories Licensing Corporation.
CD CD Mechanism Type CDM38L-5BD34L
Section Base Unit Name BU-5BD34L
Tape deck Model Name Using Similar Mechanism HCD-GRX30
Section Tape Transport Mechanism Type TCM-230AWR2/230PWR2
Model Name Using Similar Mechanism HCD-VX5A/VX5AJ/VX7A
Optical Pick-up Name KSS-213D/Q-RP
E Model
Tourist Model
Amplifier section
The following measured at AC 110, 220 V 50/60 Hz
DIN power output (rated) 60+60 W
(6 Ω at 1 kHz, DIN)
Continuous RMS power output (reference)
80+80 W
(6 Ω at 1 kHz, 10 % THD)
The following measured at AC 120, 240 V 50/60 Hz
DIN power output (rated) 70 + 70 W
(6 Ω at 1 kHz, DIN)
Continuous RMS power output (reference)
100+100 W
(6 Ω at 1 kHz, 10 % THD)
Inputs
MD/VIDEO (AUDIO) IN: voltage 450 mV/250 mV,
(phono jacks) impedance 47 kΩ
MIX MIC: sensitivity 1 mV,
(phono jack) impedance 10 kΩ
Outputs
MD/VIDEO (AUDIO) OUT:
(phono jacks) voltage 250 mV
impedance 1 kΩ
PHONES: accepts headphones of 8 Ω or more
(stereo mini jack)
SPEAKER: accepts impedance of 6 to 16 Ω
SUPER WOOFER: voltage 1 V, impedance 1 kΩ
VIDEO CD/CD player section
System Compact disc, digital audio and
video system
Laser Semiconductor laser
(λ=780nm)
Emission duration: continuous
SPECIFICATIONS
Laser output Max. 44.6 µW*
*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.
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 NTSC, PAL
CD OPTICAL DIGIT AL OUT
(Square optical connector jack, rear panel)
Wavelength 660 nm
Output Level -18 dBm
Tape player section
Recording system 4-track 2-channel stereo
Frequency response 40-13,000 Hz (±3 dB),
(DOLBY NR OFF) using Sony TYPE I casette
40-14,000 Hz (±3 dB),
using Sony TYPE II casette
Wow and flutter ±0.15 % W .Peak (IEC)
0.1 % W.RMS (N AB)
±0.2 % W .Peak (DIN)
— Continued on next page —
MINI Hi-Fi COMPONENT SYSTEM
MICROFILM
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
2 Band type: 531-1,602 kHz
(with the interval set at 9 kHz)
530-1,710 kHz
(with the interval set at 10 kHz)
3 Band type:
Middle Eastern models:
MW: 531-1,602 kHz
(with the interval set at 9 kHz)
SW: 5.95-17.90 MHz
(with the interval set at 5 kHz)
Other models:
MW: 531-1,602 kHz
(with the interval set at 9 kHz)
530-1,710 kHz
(with the interval set at 10 kHz)
SW: 5.95-17.90 MHz
(with the interval set at 5 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
General
Power requirements
Thailand models: 220-240 V AC, 50/60 Hz
Other models: 110-120 V or 220-240 V AC, 50/60 Hz
Power consumption 110 W
Dimensions (w/h/d) Approx. 280 × 340 × 380 mm
(11 × 133/8 × 15 in.)
Mass: Approx. 9.5 kg
(21 lb.)
Supplied accessories: AM loop antenna (1)
Remote commander (1)
Batteries (2)
FM lead antenna (1)
Front speaker pads (8)
Video connecting cable (1)
Design and specifications are subject to change without notice.
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.
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 the 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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
The following caution label is located inside the unit.
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.
2
TABLE OF CONTENTS
SAFETY CHECK-OUT
1. SERVICING NOTES ··················································· 4
2. GENERAL ······································································ 5
3. DISASSEMBLY
3-1. Case ···················································································· 7
3-2. Front Panel Section ···························································· 7
3-3. Tape Mechanism Deck Section
(TCM-230AWR2/230PWR2) ············································ 8
3-4. CD Mechanism Deck section (CDM38L-5BD34L) ·········· 8
3-5. Main Board········································································· 9
4. TEST MODE ································································ 10
5. MECHANICAL ADJUSTMENTS·························· 13
6. ELECTRICAL ADJUSTMENTS ··························· 13
7. DIAGRAMS
7-1. Circrit Boards Location ···················································· 18
7-2. Block Diagrams································································ 19
• CD Section····································································· 19
• Video Section································································· 20
• Tape Deck Section ························································· 21
• Main Section·································································· 22
• Display/Key Con Section ·············································· 23
7-3. Printed Wiring Board Main Section ······························· 25
7-4. Schematic Diagram Main Section (1/4) ························· 26
7-5. Schematic Diagram Main Section (2/4) ························· 27
7-6. Schematic Diagram Main Section (3/4) ························· 28
7-7. Schematic Diagram Main Section (4/4) ························· 29
7-8. Printed Wiring Board CD Section ·································· 30
7-9. Schematic Diagram CD Section····································· 31
7-10. Printed Wiring Board CD Motor Section ······················· 32
7-11. Schematic Diagram CD Motor Section ·························· 33
7-12. Printed Wirint Board Tape Deck Section ······················· 34
7-13. Schematic Diagram Tape Deck Section ························· 35
7-14. Printed Wiring Board Panel Section······························· 36
7-15. Schematic Diagram Panel Section ································· 37
7-16. Printed Wiring Board AC Sec Standby Section ············· 38
7-17. Schematic Diagram AC Sec Standby Section ················ 39
7-18. Printed Wiring Board Leaf SW Section ························· 40
7-19. Schematic Diagram Leaf SW Section ···························· 40
7-20. Printed Wiring Board CD SW Section ··························· 41
7-21. Schematic Diagram CD SW Section ······························ 41
7-22. Printed Wiring Board Video Section ······························ 42
7-23. Schematic Diagram Video Section (1/3) ························ 43
7-24. Schematic Diagram Video Section (2/3) ························ 44
7-25. Schematic Diagram Video Section (3/3) ························ 45
7-26. IC Block Diagrams ··························································· 46
7-27. IC PIN Function Description············································ 49
After correcting the original service problem, perform the
following safety checks before releasing the set to the
customer.
1. Check the area of your repair for unsoldered or poorly-soldered
connections. Check the entire board surface for solder splashes
and bridges.
2. Check the interboard wiring to ensure that no wires are
"pinched" or contact high-wattage resistors.
3. Look for unauthorized replacement parts, particularly
transistors, that were installed during a previous repair . Point
them out to the customer and recommend their replacement.
4. Look for parts which, through functioning, show obvious signs
of deterioration. Point them out to the customer and
recommend their replacement.
5. Check the B+ voltage to see it is at the values specified.
6. Flexible Circuit Board Repairing
• Keep the temperature of the 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.
8. EXPLODED VIEWS
8-1. Case Section ····································································· 58
8-2. Front Panel Section ·························································· 59
8-3. Chassis Section································································· 60
8-4. CD Mechanism Deck Section-1 (CDM38L-5BD34L) ···· 61
8-5. CD Mechanism Deck Section-2 (CDM38L-5BD34L) ···· 62
8-6. Base Unit Section (BU-5BD32L)····································· 63
8-7. TC Mechanism Section-1(TCM-230AWR2/230PWR2) · 64
8-8. TC Mechanism Section-2(TCM-230AWR2/230PWR2) · 65
9. ELECTRICAL PARTS LIST ··································· 66
3
SECTION 1
e
e
SERVICING NOTES
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 th
direction of arrow.
NOTE FOR INSTALLATION (ROTARY ENCODER)
BU cam
Groove
Note:When attaching the Base unit, Insert th
section A into the groove of BU cam.
Section A
Note:When attaching the BU cam,
engage the Rotary encoder
switch as shown in the figure.
4
SECTION 2
GENERAL
@ª
@•
@¶
@§
@∞
@¢
@£
@™
1
3267
4
5
1 I/u button
2 (STANDBY)/DEMO button
8
9
0
!¡
3 DISC 1 button
4 DISC 2 button
5 DISC 3 button
6 DISC SKIP/EX-CHANGE button
7 § button
8 ( (TAPE B) button
9 p button
0 ^ (CD) button
!¡ TUNER/BAND button
!™
!£
!¢
!∞
!™ REC PAUSE/START button
!£ HI-DUB button
!¢ CD SYNC button
!∞ Phones jack
!§ VOLUME nob
!¶ )+ button
!• =+ dial
!ª 0– button
@º CD FLASH button
@¡ CD LOOP button
@™ MIC 2 jack
@£ MIC 1 jack
@¢ MIC LEVEL nob
@∞ ECHO LEVEL nob
@§ FUNCTION button
!§@º@¡ !• !¶!ª
@¶ 9 (TAPE A) button
@• ( (TAPE A) button
@ª 9 (TAPE B) button
5
$¶
$§
$∞
$¢
$£
$™
$¡
#º #¡ #™ #£
#¢
#∞
#§
#¶
#•
#º SELECT button
#¡ RETURN button
#™ PREV button
#£ NEXT button
#¢ FILE SELECT button
#∞ KARAOKE PON/MPX buitton
#§ CD NON-STOP button
#¶ SURROUND/CINEMA SPACE button
#• DBFB button
#ª ENTER/NEXT button
$º GROOVE button
$¡ TIMER SELECT button
$™ CLOCK/TIMER SET button
$£ DISPLAY button
$¢ SPECTRUM ANALYZER button
$∞ EDIT DIRECTION/TUNER MEMORY button
$§ PLAY MODE/DOLBY NR button
$¶ REPEAT/STEREO MONO button
#ª$º
6
SECTION 3
)
3
Two claws
4
Loading panel
1
Turn the cam to the direction
of arrow
A
.
A
8
Screw
(BVTP3
×
10)
2
Pull-out the
disc tray.
9
Two screws
(BVTT3
×
6)
8
Screw
(BVTP3
×
10)
!º
Screw
(BVTT3
×
5)
!º
Screw
(BVTT3
×
5)
6
Wire (flat type) (19 core)
(CN501)
7
Wire (flat type)
(17 core) (CN304)
5
Wire (flat type)
(15 core) (CN303)
!£
Screw (BVTP 3x8)
!¢
Video board
!¡
Wire (flat type)
(23 cone)(CN501)
!™
Wire(flat type)
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-1. CASE
2
Screw
(CASE3 TP2) (3
3
T wo screws
(CASE3 TP2) (3
×
12)
×
8)
6
Case
1
Three screws
(BVTP3
×
10)
3-2. FRONT PANEL SECTION
4
5
4
2
Screw
(CASE3 TP2) (3
3
T wo screws
(CASE3 TP2) (3
×
12)
×
8
7
3-3. TAPE MECHANISM DECK SECTION (TCM-230AWR2/230PWR2)
)
2
Open the
cassette lids.
3
Three screws
(BVTP2.6
×
8)
4
T wo screws
5
T ape mechanism
deck section
(TCM-230AWR2/230PWR2)
(BVTP2.6
×
8
1
Push the
cassette lids.
3-4. CD MECHANISM DECK SECTION (CDM38L-5BD34L)
4
CD mechanism deck section
(CDM38L-5BD34L)
3
T wo screws
(BVTP3
2
×
10)
Wire (flat type)
(19 core) (CN391)
1
T wo connectors
(CN392, CN393)
8
3-5. MAIN BOARD
)
1
Connector
(CN21)
3
Four screws
(BVTP3 × 10)
2
Wire (flat type) (15 core) (14 cm
(CN371)
5
MAIN board
4
T wo screws
(BVTP3 × 8)
9
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 p , ENTER/NEXT , and 1/u simulta-
neously.
2. The fluorescent indicator tube display “COLD RESET”, and
the set is reset.
[CD Delivery 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/u button to turn the set ON.
2. Press CD LOOP button and 1/u button simultaneously.
3. “STANDBY” is display and blinking wait untill “LOCK”
display before disconnect the AC cord.
[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 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 pickup.
Procedure:
1. Press 1/u button to turn the set ON.
2. Select the function “CD”.
3. Press three buttons p , ENTER/NEXT , and § simulta-
neously.
4. The Sled Servo mode is selected, if “CD” is blinking on the
fluorescent indicator tube.
5. With the CD in stop status, press ) + button to move the
pickup to outside track, or – 0 button 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 3.
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/u button to turn the set ON.
2. Select the function “TUNER”, and press TUNER/BAND
button to select the BAND “MW”.
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 “MW 9 k
STEP” or “MW 10 k 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 J0 V0”. Each time a b utton is pressed, “K” value increases.
However, once a button is pressed, it is no longer taken into
account.
“J” value increases like 1, 2, 3 ... if rotating JOG 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 effecti v e and the aging of CD section will stop sometime, if the buttons described in ste p 3
are not pressed simultaneously. In that case, press ^ button and operate the CD section.
11
[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 5
r
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 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
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
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)
set
main board
CN301
3
(L-CH)
Pin
1
(R-CH)
Pin
main board
CN301
2
(GND)
Pin
level mete
+
–
13
2. Turn the adjustment screw and check output peaks. If the peaks
e
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
HI-DUB button.
Procedure:
1. Turn the power switch on.
2. Press the p button, ENTER/NEXT button and DISC 3 button
simultaneously.
(The “VOLUME” on the fluorescent indicator tube will blink
while in the test mode.)
To exit from the test mode, press the 1/u button.
Mode: Playback
test tape
WS-48B
(3 kHz, 0 dB)
frequency counter
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
L
R
pin
good
3
pin
1
2
oscilloscop
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).
3
: L-CH)
1
: R-CH)
+
–
set
main board
CN301 (Pin
(Pin
1. Insert the WS-48B into the deck B.
2. Press the · button on the deck B.
3. Press the 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 ± 180 Hz.
5. Press the HI-DUB button.
Then back to NORMAL speed mode.
6. Adjust RV1002 on the LEAF SW board so that frequency
counter reads 3,000 ± 90 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
+
–
14
forward
reverse
main board
CN301 (Pin
(Pin
3
1
: L-CH)
: R-CH)
Deck A is RV311 (L-CH) and RV411 (R-CH), Deck B is RV301
(L-CH) and RV401 (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: AUDIO board
Sample Volue of Wow and Flutter: 0.3% or less W. RMS
(WS-48B)
REC Bias Adjustment DECK B
r
set
MD/VIDEO (AUDIO) IN
315 Hz, 50 mV (–23.8 dB)
blank tape
CS-123
600
Ω
attenuator
AF OSC
+
–
set
recorded
portion
CN301 (Pin
3
: L-CH)
(Pin
1
: R-CH)
level meter
REC LEVEL
1
3
RV301
L
RV351
R
CN303
CN301
CN304
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 press
– 0 button then rewind to recording start position.)
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.
3. After press r REC button, press P button, then recording
start.
4. Mode: Record
4. Mode: Record
5. Mode: Playback
MD/VIDEO (AUDIO) IN
1) 315 Hz
2) 10 kHz
AF OSC
attenuator
50 mV (–23.8 dB)
600
Ω
set
blank tape
CN-123
5. Mode: Playback
recorded
portion
set
CN301 (Pin
(Pin
level mete
3
: L-CH)
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 RV341
(L-CH) and R V441 (R-CH) on the A UDIO 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: AUDIO board
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 R V351 (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)
REC Level Adjustment DECK 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 press
– 0 button then rewind to recording start position.)
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.
3. After press r REC button, press P button, then recording
start.
[AUDIO BOARD] (Component Side)
RV441
RV401
RV301
LR
PB LEVEL
– DECK B –
[LEAF SW BOARD] (Component Side)
TAPE SPEED
(NORMAL) (HIGH)
RV1002
RV1001
IC602
RV341
RL
REC BIAS
CN601
RV311
– DECK A –
CN1001
RV411
LR
PB LEVEL
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.
• Take 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 level B of the oscilliscope's waveform 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.
16
Traverse waveform
C (DC
0V
Tracking servo
Sled servo
OFF
Tracking servo
Sled servo
ON
voltage)
8. Desolder the short-land (SL502) short-circuited at step 2.
Adjustment Location: BD board
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
(27 MHz)
[ VIDEO BOARD ] – SIDE B –
TEST
MODE
SL503
SL502
SL501
(27MHz)
(GND)
IC502
IC506
+
–
17
7-1. CIRCUIT BOARD LOCATION
T
d
ST-BY board
SECTION 7
DIAGRAMS
AC SEC board
VIDEO board
CD SW board
PANEL board
TUNER UNI
MAIN board
CONNECTOR board
SENSOR board
MOTOR (TURN) board
BD board
MOTOR (SLIDE) boar
18
AUDIO board
LEAF SW board
7-2. BLOCK DIAGRAMS CD SECTION
OPTICAL PICK-UP BLOCK
(KSS-213D/Q-RP)
DETECTOR
E
A
C
D
B
F
VCC
VC
A
C
D
B
A
5
C
7
D
8
B
6
RF AMP
IC103
RF
SUMMING
AMP
FOCUS
ERROR
AMP
RF EQ
AMP
RFO
HCD-VX3A
DIGITAL SERVO
DIGITAL SIGNAL PRCESSOR
IC101
32K
RAM
16
17
RFI
FE
14
INTEGRATOR
RF AC
50
ASYI
49
ASYO
48
ASYMMETRY
CORRECTION
DEMODULATOR
DIGITAL
PLL
EFM
REGISTER
SUB CODE
PROCESSOR
DATA BUS
ERROR
CORRECTOR
D/A
INTERFACE
DIGITAL
OUT
D OUT
PCM-D
BCLK
LRCK
C2PO
MUTE
64
66
67
65
14
3
1
DOUT
ADATA
BCLK
LRCK
C2PO
MUTE
IC381
CD DIGITAL
OUT
OPTICAL
E
F
LD
DRIVE
Q101
LD
LASER
TRACKING
COIL
FOCUS
COIL
DIODE
LD
POWER
M102
SLED
MOTOR
M101
SPINDLE
MOTOR
T+
T
F+
F
SD+
M
SD
SP+
M
SP
PD
16
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
VC
BUFFER
21
VC
REF
LD ON
TE
13
DIGITAL
CLV
IC104
GENERATOR
SERVO
AUTO
SEQUENCER
SERVO
INTERFACE
CLOCK
CPU
INTERFACE
A/D
CONTROL
SIGNAL
BLOCK
SERVO
BLOCK
SERVO DSP
TRACKING
SERVO
FOCUS
SERVO
SLED
SERVO
DETECTOR
MIRR
DFCT
FOK
12
VC
38
INTEG-
RATOR
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
GENERATOR
TRACKING
PWM
GENERATOR
FOCUS
PWM
GENERATOR
SLED
PWM
GENERATOR
CONVERTER
PWM
22
XTAI
XTSL
SENS
DATA
XLAT
CLOK
SCOR
SQSO
SQCK
S STOP
SCLK
XRST
71
69
7
4
5
6
15
76
77
26
8
82
S101
LIMIT SW
4
2
A+5V
(XTAL 33.8MHz)
MCK
CTRL1
SENS
DATA
XLT
CLK
SCOR
SUBQ
SQCK
SCLK
LPH
XRST
LD ON
• SIGNAL PATH
: CD
: Digital out
: VIDEO
A
VIDEO
SECTION
(Page 20)
MUTE
XRST
20
M701
TURN
MOTOR
M801
SLIDE
MOTOR
7
M
2
4
M
7
MOTOR DRIVER
OUT1
OUT2
MOTOR DRIVER
OUT2
OUT1
TURN
IC701
SLIDE
IC801
RIN
IN1
IN2
FIN
TABLE SENSOR
IC702
3
6
S801
OPEN/CLOSE
2
10
DET
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
B
MAIN
SECTION
(Page 22)
19 19
HCD-VX3A
VIDEO SECTION
ADATA
BCLK
LRCK
C2P0
LEVEL SHIFT
1
13
5
IC501
DATAI
DATAO
CLK1
HRDY
INT
HSEL
RST
4
10
8
INVERTER
Q502
RAS
13 14 28 29
38 42 40
MWE WE
RASO
CD-DATA
4
CD-BCK
3
CD-LRCK
5
6 CD-C2P0
HD-OUT
112
HD-IN
119
HCK
117
HRDY
113
HINT
114
HSEL
121
RESET
60
PGIO2/VSYNC/CSYNC
93
UCAS
LCAS
A0
16-19•22-26
CAS
D-RAM
IC507
A8
DQ1
2-5•7-10•31-34•36-39
DQ16
VIDEO/CD DECODER
IC505
ROM
IC506
O0
O7
13-15•17-21 25•4•28•29•3•2•30 12-5•27•26•23
A11
10-15•17•19•21•23-29
MD0
A17
A0
58-56•54•52-50•48•46-44
MA0
MD15
DA-DATA
DA-LRCK
DA-XCLK
A10
CE
22
37
MCE
MA10
Y-OUT
C-OUT
DA-BCK
VCK-IN
OUTPUT AMP
IC401
69
75
110
108
111
106
86
BUFFER
Q301
TRAP
Q302,306,307
BUFFER
Q303,304
MIX AMP
Q308,310
DIGITAL FILTER & D/A CONVERTER
18
19
17
D/A
CONV
IC509
5
PLM
7
13
MUTE
Q454
MUTE
Q453
AMP
IC101
14
R-CH
11
4
132
13
L - CH
J302
VIDEO OUT
J301
S VIDEO
OUT
C
MAIN
SECTION
(Page 22)
SECTION
(Page 19)
16
27MHz
384FS
768FS
DATA0
CLK1
6
8
12
9
8
7
LEVEL SHIFT
IC504
MODE
10 204
RSTB
3
11
1
CLOCK
DIVIDER
21
3.3V REG
Q531
1
24
X503
27MHz
CT503
VIDEO
FREQUENCY
+3.3VD5V
XRST
I2C.CLK
2
C.DATA
I
• R CH is omitted
• SIGNAL PATH
: CD
: VIDEO
: Y
: CHROMA
D
MAIN
SECTION
(Page 22)
CLK1, DATA0
A
CD
DATA
XLT
CLK
SENS
SCLK
MUTE
CTRL1
CTRL2
LDON
SCOR
SUBQ
SQCK
XRST
MCK
DATA0
DATAI
CLK1
INT
HSEL
HRDY
RESET
(XTAL 33.8MHz)
31
DATA1O
32
DATA1I
33
CLK1
20
CL680 INT
CL680 HSEL
21
CL680 HRDY
23
24
680 RESET
45 BUS
3
DSP DATA
4
DSP LATCH
5
DSP CLK
1
SENSE
2
SENSE CLK
10
DSP MUTE
11
CTRL1(L:DOUBLE)
27
CTRL2
28
LDON
18
SCOR
36
SUBQ DATA
SUBQ CLK
37
77
DEVICE RESET
MECHA. CONTROL
IC502
SHARPNESS
DF LATCH
A7
XIN
XOUT
NT/PAL
TEST LED
XRESET
2
I
C.CLK
2
I
C.DATA
34
22
65
15
13
93
73
12
29
30
X501
10MHz
+5V
D502
S501
SYSTEM
SELECT
NTSC
AUTO
PAL
20 20
TAPE DECK SECTION
HRP1
(PLAYBACK)
L-CH
R-CH
R-CH
E
MAIN
SECTION
(Page 22)
REC-L
PB EQ AMP
(DECK A)
IC611
RV311
PB LEVEL (L)
(DECK A)
DECK PROCESSOR
DECK A/B SELECT,PB/REC EQ AMP
DOLBY NR AMP,ALC,AMS
IC301
R IN (L)
43
ALC (L)
44
ALC
A IN (L)
48
B IN (L)
46
BIAS (N)
33
BIAS (C)
32
BIAS (M)
31
34 35
70
120
R-CH
DOLBY PASS
L.P.F
DOLBY NR
AMP
CIRCUIT
RV301
REC LEVEL (L)
(DECK B)
39
PB OUT (L)
38
40
REC EQ
AMP
HCD-VX3A
• RCH is omitted
• Signal Path
: PLAYBACK (DECK A)
: PLAYBACK (DECK B)
TC L
F
MAIN
SECTION
(Page 22)
36
: RECORD
HRP2 (1/2)
(RECORD/PLAYBACK)
L-CH
R-CH
RV441
REC BIAS (R)
(DECK B)
HRP2 (2/2)
(ERASE)
R-CH
R-CH
RV341
REC BIAS (L)
(DECK B)
BIAS OSC
T621
3
R-CH R-CH
2
PB EQ AMP
REC/PB SWITCH
1
C331,L331
REC BIAS
SWITCH
BIAS OSC
Q621,622
(DECK A)
IC601
IC602
BIAS
TRAP
Q623
RV301
PB LEVEL (L)
(DECK B)
4
A+7V
S1004
(DECK A 120/70)
S1008
(DECK B 120/70)
100
TC-RELAY
A 120/70
B NORM/CROM
19
17
PB A/B
ALC ON/OFF
16
15
85
84
PB -A/B
ALC-ON/OFF
BIAS ON/OFF
NORM/HIGH
20
18
83
82
BIAS
EQ-H/N
NR ON/OFF
RM ON/OFF
23
22
81
80
REC-MUTE
NR-ON/OFF
REC/PB/PASS
24
79
LM ON/OFF
25
78
TC-MUTE
R/P-PASS
28
SYSTEM CONTROL
27
IC501 (2/3)
AMS
CIRCUIT
26
77
AMS IN
76
CAP-M H/L
TAPE SPEED
Q335
RV1001
(HIGH)
CAPSTAN MOTOR
CONTROL SWITCH
Q1001
CAP-M CNT 2
CAP-M CNT 1
74
75
RV1002
TAPE SPEED
(NORMAL)
CAPSTAN
MOTOR DRIVE
Q336-339
CAPSTAN
MOTOR DRIVE
Q340-343
M
M1
(CAPSTAN)
A-PLAY SW
87
87
16
S1001
(DECK-A PLAY)
B-PLAY SW
86
S1002
(DECK-B PLAY)
88
S1003
(DECK-A HALF)
A-HALF
(DECK-B HALF)
S1006
B-HALF
89
(DECK-A REC)
(DECK-B REC)
S1005
S1009
A-SHUT
91
ROTATION
DETECT SENSOR
(DECK A)
IC001
B-SHUT
90
ROTATION
DETECT SENSOR
(DECK B)
IC002
A-TRG
73
TRIGGER
PLUNGER DRIVE
(DECK A)
Q333,334
SL1
TRIGGER PLUNGER
(DECK A)
B-TRG
72
TRIGGER
PLUNGER DRIVE
(DECK B)
Q331,332
SL2
TRIGGER PLUNGER
(DECK B)
21 21
HCD-VX3A
MAIN SECTION
TAPE DECK
SECTION
(Page 21)
J711
MIC1
SECTION
(Page 19)
TAPE DECK
SECTION
(Page 21)
J101 (1/2)
VIDEO/MD
(AUDIO) IN
FM75Ω
AM
E
C
VIDEO
F
L
R
ANTENNA
R-CH
FM/AM TUNER UNIT
FM ANT
FM ANT
AM ANT
ST-MUTE
AM ANT
STEREO
ST-DOUT
ST-L
ST-R
TUNED
ST-DIN
ST-CLK
ST-CE
MIC AMP
IC712(1/2)
MIC VOL
R-CH
RV712
64
66
68
67
IN F2
IN D2
IN B2
IN C2
MIC AMP
IC712(2/2)
GRAPHIC EQUALIZER CONTROL,
ELECTRICAL VOLUME
INPUT
SELECT
INTERFACE
DATA
33
CPU
CLOCK
32 34
IC101
LATCH
SOUND
CONTROL
CIRCUIT
KEY IN2
B OUT
60 59
14 11
SURROUND AMP
IC1201
2 3
2 5830
MIC IN
MIC IN
L+R
REC A2
GRAPHIC
EQUALIZER
CONTROL
CIRCUIT
57
REC B2
FOUT2
XRST
2
C.DATA
I
2
I
C.CLK
2
C.DATA
I
I2C.CLK
SPEANA
R-CH
MUTE
Q191
72
MUTE SWITCH
VOL OUT2
R-CH
BASS BOOST
CONTROL
CIRCUIT
BB B2
BB A2
.
38 39
DBFB CONTROL
SWITCH
Q111
VOL IN2
VIDEO
SECTION
(Page 20)
DISPLAY
SECTION
(Page 23)
VOLUME
CONTROL
41
42
D
G
FEED BACK
SWITCH
Q112
R-CH
OUT2
R-CH
POWER AMP
IC801
MUTE SWITCH
Q803,804,865
1418
R-CH
Q192
36
MUTE
Q113
Q113
D141
D191
Q412
OVER LOAD
DETECT
Q801
R-CH
DC DEFECT
SWITCH
Q433,434
D803
R-CH
OVER LOAD
DETECT SW
Q432,437
PROTECTOR
Q439
MUTE
Q411
RY401
RELAY DRIVE
Q431
PROTECTOR
Q435,436
R-CH
R-CH
J
DISPLAY
SECTION
(Page 23)
L
J101 (2/2)
VIDEO/MD
(REC OUT)
R
J191
SUPER WOOFER
PHONES
TM401
L
SPEAKER
IMPEDANCE
USE 6-16Ω
R
J701
CD
SECTION
(Page 19)
DISC SENS
T. SENS
TBL.L
TBL.R
LOAD OUT
B
LOAD IN
ENC 3
ENC 2
ENC 1
OPEN
65 63 61 60
67 66
68
70 69
71
ENC3
ENC2
ENC1
OUT-OPEN
16
LOAD-IN
LOAD-OUT
TBL-R
52 55 54 53 51 50 49 7
TBL-L
T-SENS
DISC-SENS
ST-CE
ST-DIN
ST-CLK
ST-DOUT
TUNED
STEREO
ST-MUTE
47
M62493-DATA
48 38
M62493-CLK
M62493-LATCH
41 40
BY-PASS
L+R/L-R
59
30
29
2
XRST
IIC-CLK
POWER
IIC-DATA
5
CD-POWER
POWER
CD-POWER
H
POWER
SECTION
(Page 23)
X613
16MHz
13
15
X OUT
SYSTEM CONTROL
IC501 (3/3)
X IN
X601
32.768kHz
11
XC OUT
10
XC IN
DBFB-H/L
1
STK-MUTE
MUTE SWITCH
Q508,509
6
LINE-MUTE
22
12
RESET
AC-CUT
RESET
SWITCH
Q501
RESET SIGNAL
3
GENERATOR
IC502
+5V
1
27
PROTECTOR IN
RESET
3
F-RELAY
36
RY-SW
I
DISPLAY
SECTION
(Page 23)
• RCH is omitted
• Signal Path
: CD PLAY
: TAPE PLAY
: RECORD
: TUNER (FM/AM)
: MIC INPUT
22 22
DIPLAY/KEY/POWER SECTION
HCD-VX3A
MAIN
SECTION
(Page 22)
MAIN
SECTION
(Page 22)
MAIN
SECTION
(Page 22)
G
FLUORESCENT INDICATOR TUBE DRIVE
LED DRIVE,KEY CONTROL
IC601
IC603
F01
F02
F03
F04
L+R
2
12.5MHz
17
16
15
14
13
DATA
CLK
X601
78
79
73
14
15
16
17
18
11
13
80
8
9
10
1
72
70
SDA
SCL
RESET
BPF1
BPF2
BPF3
BPF4
ALL BAND
KEY-0
KEY-2
JOG-A
JOG-A
VOL-A
VOL-A
SIRCS
X-O
X-I
TMR SELECT
ANODE 0
ANODE 23
GRID0
GRID1
GRID11
GRID12
L.SEL
LED
LED
STBY
40
.
42
64
41
28
38
39
D+5V
Q603
7
22
.
2
.
5
.
4
6
67
66
65
19
21
74
75
LED DRIVE
.
.
.
.
Q611-617
LED DRIVE
LED DRIVE
2
C.DATA
I
I2C.CLK
I
J
RESET
SPEANA
S601
(JOG DIAL)
S602
VOLUME
BAND-PASS FILTER
4
LINE IN
S631-663
S751-757
FUNCTION
KEY
ROTARY
ENCODER
S601
ROTARY
ENCODER
S602
REMOTE CONTROL
RECEIVER
IC602
FLUORESCENT
INDICATOR TUBE
FLC601
F1F1 F2
SWITCH
Q620
SWITCH
Q621
B+ SWITCH
Q601,602
D611-625
D751-753
D754
Q604
Q605
PWR STBY
D626
TIMER
H
MAIN
SECTION
(Page 22)
CD-POWER
POWER
CD D+5V
CD A+5V
D+5V (UNSW)
AUDIO D+5V
µ CON +B
µ CON +B
+5V (STBY)
+7V
CD M+7V
TC M+12V
ST 10V
-7V
SWITCH
Q911,912
B+
SWITCH
Q904,905
D501
D502
3
REGULATOR
SWITCH
B+
D507
D912
REGULATOR
CONTROL SW
Q903,923
+7V
IC901
B+
Q909
3
1
+5V
3
REGULATOR
IC904
+5V
REGULATOR
IC902
+7V
REGULATOR
Q901,902,913
-7V
REGULATOR
Q9144,951,952
+12V
3
REGULATOR
IC903
D831
+VH+VH
1
-VH
POWER
AMP
IC801
D918
1
1
+VL
-VL
VF
VP
D832
SWITCH
Q870
D901-904
D907-910
F953
F955
F956
F954
R951
R952
R953
T952
EXCEPT TH MODEL
VS901
VOLTAGE
SELECTOR
220/240V
F951
EXCEPT TH MODEL
120V
TH MODEL
JW256
AC IN
16
23 23
HCD-VX3A
d
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
MY : Malaysia model
SP : Singapore model
IA : Indonesia model
TH : Thai model
TW : Taiwan model
JE : T ourist 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
10MHz
IC502 !£ XOUT
2
H
IC505 &∞ COUT
3
IC505 ^ª YOUT
4
H
IC401 7 COUT
5
IC401 1 YOUT
6
H
J302 VOUT
PANEL SECTION
7
4Vp-p
27MHz
IC509 1 XT1
5.8Vp-p
8
1Vp-p
44.1kHz
IC509 !ª LRCK
4.6Vp-p
9
2Vp-p
H
2.11MHz
IC509 !¶ BCLK
4.8Vp-p
0
1Vp-p
33.8MHz
IC504 8 384FS
4.8Vp-p
!¡
2Vp-p
H
27MHz
IC504 6 27M
3.8Vp-p
!™
1.2
Vp-p
33.8MHz
IC504 !™
2.8Vp-p
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 face side seen from the
(Side A) parts face are indicated.
• Indication of transistor
C
Q
These are omitte
EB
C
EB
These are omitted
24 24
HCD-VX3A
7-3. PRINTED WIRING BOARD MAIN SECTION
12
3 4 5 6 7 8 9 1011121314
A
B
C
D
E
F
G
H
I
J
• Refer to page 18 for Circuit Boards Location.
D913
• Semiconductor Location
Ref. No. Location
D141 F-11
D191 G-10
D331 F-2
D333 G-2
D334 F-2
D335 G-2
D401 I-11
D411 H-2
D501 F-6
D502 E-6
D503 F-6
D504 F-6
D505 E-6
D506 F-7
D507 F-9
D509 G-3
D607 E-7
D801 J-11
D802 J-10
D803 I-12
D831 I-7
D832 K-8
D851 J-11
D852 I-9
D865 H-9
D870 J-2
D872 J-2
D874 K-6
D901 K-5
D902 J-5
D903 K-5
D904 J-5
D905 I-3
D906 H-3
D907 J-6
D908 J-6
D909 J-6
D910 J-6
D911 I-6
D912 I-5
D913 I-5
D915 J-4
D918 I-4
IC101 D-11
IC301 C-4
IC381 B-14
IC501 C-6
IC502 E-6
IC801 I-10
IC901 H-7
IC902 H-5
IC903 I-5
IC904 I-4
IC1201 G-13
Ref. No. Location
Q111 E-11
Q112 E-11
Q113 G-11
Q161 E-11
Q162 E-10
Q163 G-11
Q191 E-13
Q192 G-12
Q331 D-2
Q332 D-3
Q333 D-3
Q334 D-3
Q335 E-2
Q336 G-2
Q337 G-2
Q338 F-2
Q339 G-2
Q340 F-2
Q341 F-2
Q342 F-2
Q343 F-2
Q411 H-2
Q412 H-2
Q431 H-12
Q432 H-13
Q433 H-13
Q434 H-13
Q435 G-12
Q436 H-12
Q437 H-12
Q439 G-13
Q461 I-2
Q501 F-7
Q508 E-6
Q509 E-6
Q801 J-11
Q803 G-9
Q804 G-9
Q851 I-11
Q865 H-9
Q870 J-2
Q901 H-3
Q902 I-3
Q903 H-3
Q904 H-5
Q905 H-5
Q909 I-4
Q911 H-4
Q912 H-5
Q913 H-4
Q914 G-4
Q923 H-3
Q951 G-3
Q952 H-3
R473
R423
K
16
25 25
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