Sample Pulse Width Adjustment; Sample Pulse V Gate Width Adjustment - Sony CCU-590 Maintenance Manual

4-4-5. Sample Pulse Width Adjustment

Adjustment category: B
Measuring instrument: Oscilloscope
Extended board: DM-140 board
Measurement point:
TP504 (GND: E301)/DM-140
board
Adjustment point: 1RV503 (SAMPLE S/H)/DM-
140 board
T = 40.0 ± 2.0 us
Specification:
V
T
H
TP601
RV601
G
RV701
TP101 E101
F
TP603 TP602
S101
RV161
RV602
RV603
TP102
E
TP1
D
S1
A
RV902
RV702 RV802
1 2
DM-140 BOARD (SIDE A)
CCU-590/P/V1(E)
50%
CN902
RV803
RV903
TP902
RV901
RV801
S301 TP301
E301
TP803 TP802
RV301
RV804
RV805
TP302
TP501
LV501
TP502
RV502
RV501
RV503
TP503
TP505
RV504
TP504
TP901
TP701 TP801
4
E1
3
4-4-6. Sample Pulse V Gate Width
Adjustment
Adjustment category:
B
Measuring instrument: Oscilloscope
Extended board:
DM-140 board
Measurement point: TP503 (GND: E301)/DM-140
board
Adjustment point: 1RV502 (SAMPLE GATE)/
DM-140 board
T = 800 ± 10 us
Specification:
Adjustment:
TP503
V
T
Check after adjustment
. Check the number of TP504 sample pulses after adjust-
ing gate pulse width.
Check procedure:
6 pulses
TP504
5 pulses
50%
(for NTSC)
Check TP504 if there are 6
sample pulses in the odd
field and also in the even
field.
(for PAL)
Check TP504 if there are 5
sample pulses in the odd
field and also in the even
field.
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