Sony XTL-W70 Service Manual page 19

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-W71 is connected to CN3 (MONITOR
OUT) of Tuner Unit (XT-992V) 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-W71) (Monitor Section)
• CN101 of XVM-W71 is connected to CN3 (MONITOR
OUT) of Tuner Unit (XT-992V) 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-W71) (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.
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.
• 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
1.0Vp-p
H
IC407 ra
6
1.0Vp-p
H
IC407 rs
19 19
XTL-W70
• 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
(SIDE A) ) (SIDE B) )
Ref. No. Location Ref. No. Location
D122 H-8 D1 I-6
D123 H-8 D120 B-7
D201 E-11 D121 B-7
D203 E-10 D602 D-3
D204 F-10 D801 A-7
D205 F-10 D902 H-2
D206 F-9 D903 G-2
D208 E-11 D906 F-1
D550 B-9
D802 A-7 IC1 I-9
D803 A-5 IC110 B-7
D804 A-5 IC111 B-6
D810 B-8 IC406 D-8
D811 A-8 IC407 E-7
D904 H-2 IC501 C-13
D905 G-1 IC601 E-4
IC801 A-8
IC201 E-12 IC901 G-2
IC502 B-10 IC902 H-1
IC510 C-10 IC910 G-3
IC802 A-6
Q110 B-6
Q111 H-8 Q120 C-9
Q112 H-8 Q405 D-9
Q113 H-9 Q407 D-9
Q202 D-11 Q408 D-9
Q205 E-11 Q501 B-11
Q603 A-5 Q601 B-5
Q604 A-5 Q602 A-4
Q801 A-7 Q607 E-3
Q803 B-5 Q901 G-1
Q804 A-5 Q910 H-3
Q810 B-8
Q811 B-8