Sony XTL-W70 Service Manual page 19

Q Q
3 7 6 3 1 5 1 5 0
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 diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
1 / W or less unless otherwise
4
specified.
• % : indicates tolerance.
• : internal component.
f
• C : panel designation.
• A : B+ Line.
• B : B– Line.
• H : adjustment for repair.
• CN101 of XVM-W70 is connected to CN3 (MONITOR
OUT) of Tuner Unit (XT-991V) with a monitor cable.
Power voltage is dc 14.4 V from ACC cord of the Tuner
Unit and fed with regulated dc power supply.
(XVM-W70) (Monitor Section)
• CN101 of XVM-W70 is connected to CN3 (MONITOR
OUT) of Tuner Unit (XT-991V) with a monitor cable.
Voltage and waveforms are measured at input the color
bar signal from INPUT 1 VIDEO (J5-1) jack of the Tuner
Unit. (XVM-W70) (Monitor Section)
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC CN4. (Tuner Section)
• Voltage is dc with respect to ground under no-signal
condition. (Tuner Section)
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
T E
L 1 3 9 4 2 2 9 6 5 1 3
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path. (Monitor section)
F
: TV and External Video (AUDIO)
J
: NAVI (AUDIO)
c : VIDEO
• Signal path. (Tuner section)
L : VIDEO
F
: AUDIO
for printed wiring boards:
• Y : parts extracted from the conductor side.
• : Through hole. (Monitor, Monitor Switch
a
Sections.)
• : Through hole. (Tuner section)
z
• : Pattern from the side which enables seeing.
(The other layer's 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.
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• Waveforms
— Monitor Board —
1
5.0Vp-p
H
IC407 ef
2
5.0Vp-p
H
IC407 eg
3
1.0Vp-p
H
IC407 eh
4
1.0Vp-p
H
IC407 r;
5
Q Q
3 7 6 3 1 5 1
1.0Vp-p
H
IC407 ra
6
1.0Vp-p
H
IC407 rs
c o
.
19 19
2 4 2
9 8
• Waveforms
— Tuner Board —
1
2.2Vp-p
8MHz
wa
IC12 (X IN)
2
0.9Vp-p
3.58MHz
IC24 4 (VXO1)
3
3.1Vp-p
3.5MHz
IC31 6 (XT)
• Semiconductor • Semiconductor
Location Location
(MONITOR BOARD (MONITOR BOARD
5 0 8 9 2 4 9 8 2
(SIDE A) ) (SIDE B) )
Ref. No. Location Ref. No.
D122 H-8 D1
D123 H-8 D120
D201 D-11 D121
D203 E-10 D602
D204 F-10 D801
D205 F-10 D902
D206 F-9 D903
D208 E-11 D906
D550 B-9
D802 A-7 IC1
D803 A-5 IC110
D804 A-5 IC111
D810 B-8 IC406
D811 A-8 IC407
D904 H-2 IC501
D905 G-1 IC601
IC801
IC201 E-12 IC901
IC502 B-10 IC902
IC510 C-10 IC910
IC802 A-6
Q110
Q111 H-8 Q120
Q112 H-8 Q405
Q113 H-9 Q407
Q202 D-11 Q408
Q205 E-11 Q501
Q603 A-5 Q601
Q604 A-5 Q602
Q801 A-7 Q607
Q803 B-5 Q901
m
Q804 A-5 Q910
Q810 B-8
Q811 B-8
XTL-W70
9 9
9 9
Location
I-6
B-7
B-7
D-3
A-7
H-2
G-2
F-1
I-9
B-7
B-6
D-8
E-7
C-13
E-4
A-8
G-2
H-1
G-3
B-6
C-9
D-9
D-9
D-9
B-11
B-5
A-4
E-3
G-1
H-3