NEC PlasmaSync 50MP1 User Manual page 72

2
No pictures available only in PAL mode (3-line Y/C separation defective)
Is a composite signal available
at Pin 3 of IC5303?
(See Fig. 8.)
YES
Are the Y/C signals available
at TP5304/TP5305?
(See Figs. 12 and 13.)
YES
Are the Y/C signals available
at TP5306/TP5307?
(See Figs. 12 and 13.)
YES
Failure in IC5306 to IC5309.
Fig. 12 Signal Y
TP5304 1.2Vpp
TP5306 1Vpp
NO
Failure in Q5302 to Q5305.
NO
Is 5V available at the power
pin of IC5303?
YES
IC5303 is out of order.
NO
Failure in Q5306 to Q5310.
Fig. 13 Signal C
TP5305 Burst section : 300mVpp
TP5307 Burst section : 300mVpp
8
NO
T5302 disconnected or fail-
ure in the power supply.
Conditions:
1. During the reception of
VIDEO PAL C-BAR
2. Mode VIDEO