NEC PlasmaSync 50MP1, Руководство пользователя

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6
Fig. 6
Signal Y at Pin 15 of IC5504 Fig. 7
Signal C at Pin 13 of IC5504
Fig. 4
Pins 7 and 10 of Connector P0YU
(horizontal sync signals) Fig. 5
Pins 9 and 12 of Connector P0YU
(vertical sync signals)
64us
64us
5Vpp
16ms
5Vpp
64us
Burst section : 300mV
64us
1Vpp
16ms
2. Video error
2-1. No video input signals available at VIDEO 1, 2, 3 (S-VIDEO)
YES YES
Are the RGB signals available Are the horizontal sync signals Failure in the MAIN PWB.
at Pins 1, 3, and 5 of the P0YU available at Pins 7 and 5 of the Details described in Item
connector? (See Figs. 1 to 3.) P0YU connector and the vertical 2-5. (P.13)
sync signals available at Pins
NO 9 and 12? (See Figs. 4 and 5.) NO
Failure in the VIDEO PWB.
YES
Are the RGB signals available IC5709 and peripheral circuits
at TP5704 to TP5706? are out of order.
(See Figs. 1 to 3.)
NO
YES
Is the RGB signal output ge- IC5702, IC5704, IC5706, and
nerated from Pins 41 to 43 of peripheral circuits are out of
IC5504? (Similar waveforms order.
in Figs. 1 to 3)
NO
YES
Is the Y signal input applied to IC5504 and peripheral circuits
Pin 15 of IC5504, and the C are out of order.
signal input to Pin 13?
(See Figs. 6 and 7.)
NO
Ternary Y/C separation is defective in the NTSC mode.
→
1
No pictures available only in NTSC mode (P.7)
3-line Y/C separation defective in the PAL mode.
→
2
No pictures available only in PAL mode (P.8)
Conditions:
1. During the reception
of VIDEO NTSC C-
BAR
2. Mode VIDEO
Fig. 1 Signal G
Pin 1 of Connector P0YU : 1.4Vpp
TP5704 ; 8Vp-p
Fig. 2 Signal B
Pin 3 of Connector P0YU : 1.4Vpp
TP5705 ; 1.8Vpp
Fig. 3 Signal R
Pin 5 of Connector P0YU : 1.4Vpp
TP5706 ; 1.8Vpp