Dc Offset Adjustment - Sony DVW-250 Maintenance Manual

9-4-3. DC Offset Adjustment

Preparation
• Disconnect the cable from the AUDIO IN connectors
(CH-1 through CH-4) /connector panel.
Adjustment procedure
1. CH-1 DC Offset Adjustment
: Oscilloscope (TRIG slope :–)
Equipment
: TP1002 (J-2 : B) /DPR-62
Test point
: E1503 (H-1) /DPR-62
GND
TRIG : TP1400 (J-2 : B) /DPR-62
Adjustment point : 1RV5 (L-3 : B) /ADA-44
Equate the intensity of two lines.
2. Adjust the channnel-2 through 4 in the same way.
Test point TRIG slope
CH-2 TP1002 (J-2 : B) +
CH-3 TP1001 (J-2 : B) –
CH-4 TP1001 (J-2 : B) +
P
R
1
2
3
DVW-250/250P
Adjustment point
1RV6 (L-2 : B)
1RV7 (L-2 : B)
1RV8 (L-2 : B)
L
M
N
RV3 RV8
RV4 RV7
RV2 RV6
RV1 RV5
1
2
3
4
5
6
7
8
9
A B C
TP1002
TP1400
J H G F
K J H G F
9-4. Audio System Adjustment
E1503
D E F G
DPR-62 Board A side
C B
E D
DPR-62 Board B side
E D
C
RV207 RV205
RV204
RV201
RV208 RV206
RV202
ADA-44 Board B side
H J
1
2
3
4
5
6
7
8
9
A
B
A
RV203
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