Sony XVM-R70 Service Manual page 47

SECTION 1
DIAGRAMS
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. (p: pF)
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.
Note: Note:
The components identi- Les composants identifiés par
une marque 0 sont critiques
fied by mark 0 or dotted
line with mark 0 are criti- pour la sécurité.
cal for safety. Ne les remplacer que par une
Replace only with part piéce por tant le numéro
number specified. spécifié.
• A : B+ Line.
• B : B– Line.
• H : adjustment for repair.
• CN401 of XVM-R70 is connected to Connection Box with
a monitor cable.
Power voltage is dc 14.4 V from ACC cord of the Connec-
tion Box and fed with regulated dc power supply.
• CN401 of XVM-R70 is connected to Connection Box with
a monitor cable.
Voltage and waveforms are measured at input the color
bar signal from the Connection Box.
• 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.
F : AUDIO
g : VIDEO
• Abbreviation
CND : Canadian model.
for printed wiring boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
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.
• Abbreviation
CND : Canadian model.
• Waveforms (LCD Board)
1V/DIV 50µsec/DIV 9
1
3.5Vp-p
127µsec
TP505
0.2V/DIV 20µsec/DIV 0
2
1Vp-p
H
TP506
qa
3 0.2V/DIV 20µsec/DIV
1Vp-p
H
TP507
4 0.2V/DIV 200nsec/DIV qs
0.8Vp-p
3.5714MHz
TP508
5 0.5V/DIV 200nsec/DIV qd
1.1Vp-p
2.8MHz
TP352
6 0.5V/DIV 200nsec/DIV qf
1.1Vp-p
2.3MHz
TP353
7 1V/DIV 10msec/DIV qg
3.5Vp-p
16.5µsec
TP406
1V/DIV 20µsec/DIV qh
8
3.6Vp-p
64µsec
TP407
3 3
5V/DIV 5µsec/DIV qj 0.2V/DIV 50nsec/DIV
13.2Vp-p 5.4Vp-p
8.4µsec
14.48MHz
TP850 TP612
10V/DIV 5µsec/DIV qk 5V/DIV 2µsec/DIV
11.8Vp-p
30.7Vp-p
4.2µsec
14.7µsec
TP851 TP801
1V/DIV 5msec/DIV ql 10V/DIV 2µsec/DIV
3.5Vp-p 35Vp-p
16.4µsec 4.2µsec
TP601 TP802
1V/DIV 50µsec/DIV 0.5V/DIV 20µsec/DIV
w;
3.5Vp-p
2.2Vp-p
128µsec
63µsec
TP602 TP808
1V/DIV 20µsec/DIV 2V/DIV 50µsec/DIV
wa
3.5Vp-p 4.4Vp-p
127µsec
62.6µsec
TP603 TP809
1V/DIV 50µsec/DIV 1V/DIV 20µsec/DIV
ws
3.3Vp-p
3.5Vp-p
2H
190.9µsec
TP606 TP810
1V/DIV 10µsec/DIV wd 1V/DIV 20µsec/DIV
2.8Vp-p
3.2Vp-p
63.4µsec 2H
TP609 TP811
1V/DIV 50nsec/DIV wf 1V/DIV 20µsec/DIV
3.3Vp-p
3.6Vp-p
2H
7.2MHz
TP611 TP812
XVM-R70