NEC PlasmaSync 50MP1 User Manual page 74

2-3. No video signals available at the DVD/HD input circuit
Are the Y, Pb, and Pr signals
available at Pins 1, 3, and 5 of
the P0YU connector?
(See Figs. 19 to 21.)
NO
Are the Pb and Pr signals
available at TP5704 to TP5706?
(Similar waveforms in
Figs. 19 to 21)
NO
IC5702, IC5704, and IC5706
are out of order.
Fig. 19 Signal Y
Pins 1 of Connector P0YU ; 1.3Vpp
Fig. 22 Horizontal Sync Signals
Pins 7 and 10 of Connector P0YU ; 5Vpp
YES
Are the HV signals available
at Pins 7, 9, 10, and 12 of the
P0YU connector?
(See Figs. 22 and 23.)
YES
Failure in IC5709.
Conditions:
1. During the reception of HDTV (1080i) C-BAR
2. Mode HD
Fig. 20 Signal Pb
Pin 3 of Connector P0YU ; 1Vpp
Fig. 23 Vertical Sync Signals
Pins 9 and 12 of Connector P0YU ; 5Vpp
10
YES
Failure in the MAIN PWB.
Details described in Item
2-5. (P.13)
NO
Failure in the VIDEO PWB.
Fig. 21 Signal Pr
Pin 5 of Connector P0YU ; 1Vpp