HCD-WZ7AV - Sony Audio Service Manual (repair manual)

Model
HCD-WZ7AV
Pages
61
Size
7.04 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-wz7av.pdf
Date

View Sony HCD-WZ7AV Service Manual online

HCD-WZ7AV
E Model
SERVICE MANUAL
VIDEO CD/CD PLAYER
SPECIFICATIONS
Ver 1.0  2003. 06
• HCD-WZ7AV is the tuner, and Video CD/
CD player section in MHC-WZ7AV.
CD player section
System
Compact disc and digital 
audio system
Laser
Semiconductor laser 
(
λ=795 nm)
Emission duration: 
continuous
Frequency response
2 Hz – 20 kHz (
±0.5 dB)
Wavelength
795 nm
Signal-to-noise ratio
More than 90 dB
Dynamic range
More than 90 dB
Video color system format
NTSC, PAL
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 ohms unbalanced
Intermediate frequency
10.7 MHz
AM tuner section
Tuning range
Middle Eastern model:
531 – 1,602 kHz 
(with the tuning interval 
set at 9 kHz) 
Other models:
530 – 1,710 kHz 
(with the tuning interval 
set at 10 kHz)
531 – 1,602 kHz 
(with the tuning interval 
set at 9 kHz)
Antenna
AM loop antenna
Antenna terminals
External antenna terminal
Intermediate frequency
450 kHz 
Dimensions (w/h/d)
CD player/Tuner:
Approx. 255 
× 135 ×
355 mm
Mass
CD player/Tuner:
Approx. 3.0 kg
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
9-877-479-01
2003F1678-1
© 2003.06
Model Name Using Similar Mechanism
NEW
CD
CD Mechanism Type
CDM77C-30BD62
Section
Base Unit Name
BU-30BD62
Optical Pick-up Name
A-MAX.3
2
HCD-WZ7AV
Laser component in this product is capable
of emitting radiation exceeding the limit for
Class 1.
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.
TABLE OF CONTENTS
1. GENERAL
·········································································· 4
2. DISASSEMBLY
2-1. Case ··············································································· 7
2-2. Front Panel Assy ··························································· 8
2-3. PANEL Board, CD-TC Board, ENTER-SW
Board, BACK LIGHT Board, LCD Board ··················· 8
2-4. DPL Board ···································································· 9
2-5. MAIN Board, REGULATOR Board, HP AMP Board ··· 9
2-6. CD mechanism deck (CDM77C-30BD62) ················· 10
2-7. VMP Board ································································· 10
2-8. MIC Board ·································································· 11
2-9. Tray (AU) ···································································· 11
2-10. MS-128 Board ···························································· 12
2-11. Base Unit ···································································· 12
2-12. BD Board, BU-30 (61) Assy ······································· 13
3. TEST MODE
···································································· 14
4. ELECTRICAL ADJUSTMENT
·································· 15
5. DIAGRAMS
5-1. Circuit Boards Location ·············································· 16
5-2. Block Diagrams - CD SERVO Section - ···················· 18
- AUDIO/VIDEO Section - ·············· 19
- MAIN Section - ····························· 20
5-3. Printed Wiring Board - BD Section - ·························· 21
5-4. Schematic Diagram - BD Section - ···························· 22
5-5. Printed Wiring Board - VMP Section (SIDE A) - ······· 23
5-6. Printed Wiring Board - VMP Section (SIDE B) - ······· 24
5-7. Schematic Diagram - VMP Section (1/2) - ················· 25
5-8. Schematic Diagram - VMP Section (2/2) - ················· 26
5-9. Printed Wiring Board - MAIN, LOADING Section - ··· 27
5-10. Schematic Diagram
- MAIN, LOADING Section (1/2) - ····························· 28
5-11. Schematic Diagram
- MAIN, LOADING Section (2/2) - ··························· 29
5-12. Printed Wiring Board - PANEL Section - ··················· 30
5-13. Schematic Diagram - PANEL Section - ····················· 31
5-14. Printed Wiring Board - FRONT Section - ·················· 32
5-15. Schematic Diagram - FRONT Section - ····················· 33
5-16. Printed Wiring Board - DPL Section - ························ 34
5-17. Schematic Diagram - DPL Section - ·························· 35
5-18. Printed Wiring Board - REGULATOR Section - ········ 36
5-19. Schematic Diagram - REGULATOR Section - ·········· 37
5-20. IC Block Diagram ······················································· 38
5-21. IC Pin Function Description ······································· 39
6. EXPLODED VIEWS
6-1. Front Panel Section ····················································· 46
6-2. Chassis Section ···························································· 47
6-3. CD Mechanism Section (CDM77C-30BD62) ············ 48
6-4. Base Unit Section (BU-30BD62) ································ 49
7. ELECTRICAL PARTS LIST
······································· 50
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 pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
NOTES  ON  HANDLING  THE  OPTICAL  PICK-UP
BLOCK  OR  BASE  UNIT
This appliance is
classified as a CLASS 1
LASER product. This
label is located on the
rear exterior.
The following caution label is located inside the apparatus.
3
HCD-WZ7AV
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.
MODEL IDENTIFICATION
— BACK PANEL —
PARTS No.
Unleaded solder
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.)
 : LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40
°C higher than
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350
°C.
Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
[When bringing in the equipment for service]
In case of repairing, please bring the entire system set([HCD-
WZ7AV, DXA-WZ7AV],except for the speaker) to the service
station.
MODEL
Saudi Arabian model
Thai model
Singapore model
PARTS No.
4-244-440-3
s
4-244-440-4
s
4-244-440-5
s
4
HCD-WZ7AV
This section is extracted
from instruction manual.
SECTION 1
GENERAL
Main unit
CD 5 (11, 14, 16, 19, 22, 23, 28)
CD SYNC 9 (22)
Control lever 7 (8, 25)
DIMMER w; (31)
Disc tray wg (11)
DISPLAY ql (30, 31)
Display window wf
ECHO LEVEL wa (27)
EFFECT qj (24, 25, 27)
EQ EDIT qk (25, 39)
GROOVE 7 (24, 27)
Headphone jack qd
MD (VIDEO)/DVD 2 (23, 35, 
36)
MIC LEVEL ws (26)
Microphone jacks wd
MOVIE MODE 7 (24, 27)
MUSIC MODE 7 (24, 25, 27)
PLAY MODE/DIRECTION qg
(12, 16, 21, 22, 23, 27)
PRO LOGIC 7 (9, 26)
PUSH ENTER 7 (10, 16, 18, 25, 
28, 29)
Remote sensor qs
REPEAT/FM MODE qh (15, 20)
TAPE A/B 3 (21, 22, 23, 27, 28)
TUNER/BAND 6 (18, 19, 20, 
23, 28)
VOLUME qa (9, 28)
2CH/MULTI qf (36)
?/1 (power) 1 (7, 19, 28, 35, 
39)
X (pause) 4 (12, 21)
nN (play) 4 (7, 12, 21, 22, 
27)
x (stop) 4 (8, 12, 19, 21, 22, 27, 
39)
+M> (fast forward/go 
forward) 4 (7, 12, 18, 21)
.m– (rewind/go back) 4
(7, 12, 18, 21)
Z (open/close) 8 (11)
z START q; (22)
ALPHABETICAL ORDER
A – L
M – Z
BUTTON DESCRIPTIONS
CD player/Tuner
5
HCD-WZ7AV
Remote control
ALBUM +/– 6 (12, 16)
CD wa (11, 14, 16, 22, 23, 28)
CENTER LEVEL +/– qa (9)
CLEAR ed (16, 17)
CLOCK/TIMER SELECT t;
(29, 30)
CLOCK/TIMER SET rl (10, 28, 
29)
DIMMER 5 (31)
DISPLAY 4 (30, 31)
DVD eh (36)
EFFECT ra (24, 25, 27)
ENTER r; (10, 16, 18, 25, 28, 
29)
EQ EDIT rs (25)
FM MODE wj (20)
GROOVE qh (24, 27)
KARAOKE/MPX rh (26)
KEY CONTROL 
#
/
2
qd (27)
MD (VIDEO) rd (35)
MOVIE MODE qk (24, 27)
MUSIC MODE qj (24, 25, 27)
NEXT rg (13, 14, 17)
Number buttons wf (14, 17)
ON SCREEN wh (32)
PLAY MODE/DIRECTION rk
(12, 16, 21, 22, 23, 27)
PRESET –/+ ws (18, 19)
PREV rf (13, 14, 17)
PROGRAM EDIT ek (22)
PRO LOGIC qf (9, 26)
REPEAT wk (15)
SELECT wd
SLEEP wl (28)
SPECIAL MENU wg (17)
SURROUND ql (25)
SURROUND LEVEL +/– q; (9)
TAPE A/B ej (21, 22, 23, 27, 28)
TEST TONE el (9)
TUNER/BAND 9 (18, 19, 20, 
23, 28)
TUNER MEMORY es (18)
TUNING –/+ eg (18, 20)
TUNING MODE rj (18, 19)
TV CH +/– 3 (35)
TV VOL +/– 2 (35)
TV/VIDEO ea (35)
VOL +/– qs (9, 28)
2CH/MULTI w; (36)
?/1 (power) 1 (7, 28)
m/M (rewind/fast forward) 
eg (12, 18, 21)
./> (go back/go forward) 
ws (12, 18, 21)
nN (play) wd (12, 21, 22, 27)
X (pause) 7 (12, 21)
x (stop) 8 (12, 21, 22, 27)
M
/m/</, (cursor) qg (9, 28)
TV ?/1 e; (35)
RETURN O ef (14)
ALPHABETICAL ORDER
A – O
P – Z
BUTTON DESCRIPTIONS
M
x
+
+
+
+
+
O
.
>
m
b
B
V
v
nN
X
+
wl
wa
w;
ql
qf
qg
qh
qs
qa
qd
1
3
2
wf
qj
qk
ws
wd
4
5
6
7
8
9
q;
wk
wj
wh
wg
M
x
+
+
+
+
+
O
.
>
m
b
B
V
v
nN
X
+
t;
rl
rk
rf
r;
ra
rs
el
ef
ed
es
ea
e;
eg
eh
ek
ej
rh
rd
rg
rj
6
HCD-WZ7AV
Perform the following procedures 1 to 7 to hook up your system using the supplied cords and 
accessories. Middle Eastern model is used for illustration purpose.
Preparation
Place the components as shown below.
1
Connect the system control cables to 
the SYSTEM CONTROL connectors on 
the tape deck.
Connect to the same numbered jack in the 
order indicated on the rear panel.
Note
The system cable is used to send signals and electricity 
between the components for interlinked operation.
Be sure to insert the connector horizontally until it 
clicks into place. Otherwise the system will not operate 
correctly.
2
Connect the speakers.
Connect the appropriate speaker cords from 
the speaker terminals to the corresponding 
SPEAKER terminals on the amplifier.
Getting Started
Hooking up the system
AM loop antenna
FM lead antenna
CD player/Tuner
Amplifier/Tape deck
To front speaker (right)
To front speaker 
(left)
To surround speaker (right)
To surround speaker (left)
To center speaker
Amplifier/
Tape deck
CD player/
Tuner
7
HCD-WZ7AV
SECTION 2
DISASSEMBLY
• The equipment can be removed using the following procedure.
SET
MS-128 BOARD
BASE UNIT 
VMP BOARD
MIC BOARD
FRONT PANEL ASSY
CASE
PANEL BOARD, CD-TC BOARD, 
ENTER-SW BOARD,
BACK LIGHT BOARD, LCD BOARD
DPL BOARD
MAIN BOARD,
REGULATOR BOARD,
HP AMP BOARD 
CD MECHANISM
(CDM77C-30BD62)
TRAY (AU)
BD BOARD,
BU-30 (61) ASSY
2-1. Case
Note :
 Follow the disassembly procedure in the numerical order given.
1
three screws
(+BVTP 3 
×
 8)
2
two screws
     (case 3 TP2)
4
case
3
two screws
     (case 3 TP2)
8
HCD-WZ7AV
2-2. Front Panel Assy
2-3. PANEL Board, CD-TC Board, ENTER-SW Board, BACK LIGHT Board, LCD Board
9
front panel
     assy
7
connector 
     (CN108)
3
loading panel 
How to eject the disk tray when the
main power cannot be turned on. 
1
2
8
wire (flat type) 
(23 core) (CN109)
4
three screws
(+BVTP 3 
×
 8)
6
5
claw
bottom side
5
two claws 
qh
three claws 
qf
PANEL board 
qs
ENTER-SW board 
7
CD-TC board 
qj
BACK LIGHT board 
w;
LCD board 
wa
LCD assy 
ql
Remove the soldering.
 
qd
wire (flat type) 
(23 core) (CN605)
8
eight screws
(+BVTP 2.6 
×
 8)
qa
two screws
(+BVTP 2.6 
×
 8)
qg
four screws
(+BVTP 2.6 
×
 8)
qk
two screws
(+BVTP 2.6 
×
 8)
9
connector
(CN602)
q;
connector
(CN603)
6
connector
(CN804)
4
two screws
(+BVTP 2.6 
×
 8)
1
knob (volume)
3
button (cursor)
2
nut
9
HCD-WZ7AV
2-4. DPL Board
5
cord connector 
     (CN302)
0
cord connector 
     (CN107)
9
cord connector 
     (CN503,CN504)
6
cord connector 
     (CN303)
qa
back panel 
2
wire (flat type) 
(11 core)
1
wire (flat type) 
(17 core)
4
three screws
(+BVTP 3 
×
 8)
7
screw
(+BVTP 3 
×
 8)
3
five screws
(+BVTP 3 
×
 8)
8
DPL board 
2-5. MAIN Board, REGULATOR Board, HP AMP Board
8
two claws 
9
MAIN board 
0
REGULATOR board 
1
connector 
     (CN601)
4
wire (flat type) 
(5 core) (CN103)
5
wire (flat type) 
(19 core) (CN102)
6
screw
(+BVTP 3 
×
 8)
7
four screws
(+BVTP 3 
×
 8)
2
screw
(+BVTP 3 
×
 8)
3
 HP AMP board 
10
HCD-WZ7AV
2-6. CD mechanism (CDM77C-30BD62)
2-7. VMP Board
1
wire (flat type) 
(5 core) (CN103)
3
wire (flat type) 
(29 core) (BD board)
2
three screws
(+BVTP 3 
×
 8)
4
CD
 mechanism
     (CDM77C-30BD62)
7
wire (flat type) 
(28 core) (CN101)
3
claw
qa
bracket (YN)
0
VMP board
8
wire (flat type) 
(19 core) (CN201)
4
four screws (+BV)
5
bracket (VCD)
1
screw
(+BVTP 3 
×
 8)
9
three screws
(+BVTP 3 
×
 8)
6
two screws
(+BVTP 3 
×
 8)
2
connector 
     (CN303)

Download Sony HCD-WZ7AV Service Manual (Repair Manual)

Here you can view online and download Sony HCD-WZ7AV Service Manual in PDF. HCD-WZ7AV service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony HCD-WZ7AV Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.