Sony HCD-ZX70DVD / MHC-ZX70DVD Service Manual ▷ View online
21
SECTION 5
MECHANICAL ADJUSTMENT
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
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
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
6.96 N • m to 14.02 N • m
71 to 143 g • cm
(0.98 – 1.99 oz • inch)
9.80 N • m
100 g or more
(3.53 oz or more)
9.80 N • m
100 g or more
(3.53 oz or more)
Mode
Torque meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Meter reading
FWD
FWD
back tension
back tension
REV
REV
back tension
back tension
FF/REW
FWD tension
REV tension
23
23
TUNER UNIT
SUB TRANS board
CLAMP MOTOR board
SENSOR 2 board
SENSOR board
OUT SW board
INIT/COUNT SW board
LOAD MOTOR board
CONNECTOR board
IN SW board
TK board
MIC board
(EA, MY, SP,
HK, TH, TW, CH)
(EA, MY, SP,
HK, TH, TW, CH)
TRANS board
PANEL board
MAIN board
FRONT AMP board
CD SW board
LEAF SW board
HP board
SUB PANEL board
AUDIO board
IF board
MB board
SECTION 6
DIAGRAMS
Note on Printed Wiring Boards:
•
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
W
: indicates side identified with part number.
•
b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Side A)
the parts face are indicated.
• MB board is multi-layer printed board.
However, the patterns of intermediate-layer have not been
included in the diagram.
included in the diagram.
• Indication of transistor
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
6-1.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
%
: indicates tolerance.
•
f
: internal component.
•
2
: nonflammable resistor.
•
5
: fusible resistor.
•
C
: panel designation.
•
U
: B+ Line.
•
V
: B– Line.
•
H
: adjustment for repair.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
c
: DVD PLAY
J
: CD PLAY
L
: DVD/CD PLAY (VIDEO)
F
: DVD/CD PLAY (AUDIO)
g
: DVD/CD PLAY (DIGITAL OUT)
f
: TUNER
E
: TAPE A PLAY
d
: TAPE B PLAY
G
: TAPE B REC
N
: MIC
• Abbreviation
AR
: Argentine model
AUS
: Australian model
CH
: Chinese model
CND : Canadian model
EA
EA
: Saudi Arabia model
HK
: Hong Kong model
MX
: Mexican model
MY
: Malaysia model
SP
: Singapore model
TH
: Thai model
TW
: Taiwan model
Note:
The components identi-
fied by mark
The components identi-
fied by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number specified.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce por tant le numéro
spécifié.
Ne les remplacer que par une
pièce por tant le numéro
spécifié.
• Circuit Boards Location
HCD-ZX70DVD
24
24
6-2.
PRINTED WIRING BOARD – TK Board –
•
See page 23 for Circuit Boards Location.
(Page 26)
(Page 26)
25
25
HCD-ZX70DVD
6-3.
SCHEMATIC DIAGRAM – TK Board –
•
See page 62 for Waveforms.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : DVD STOP
no mark : DVD STOP
(Page 34)
(Page 35)
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque
0
sont
critiques pour la sécurité.
Ne les remplacer que
par une pièce portant le numéro spécifié.
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