Detailed Troubleshooting Procedure For Shorted Vda - Panasonic G20 Series Troubleshooting Handbook

Detailed Troubleshooting Procedure for Shorted Vda

Unplug the connector P35 on the P board and check the resistance between pin 1 of connector P35 on the P board and ground (Chassis).
TC-P42G25
TC-P46G25
Reconnect P35 and unplug the
ribbon cable between the C1 and
C2 boards. Measure the resistance
between pin 1 of connector P35 on
the P board and ground (Chassis)
Is there a
No Yes
short
circuit ?
The problem could be the C1
board or the panel. Proceed to
isolate the panel from the C1
board to determine which is bad.
Start Here
Is there a
No
short
circuit ?
TC-P50G20
TC-P50G25
TC-P54G20
TC-P54G25
Reconnect the ribbon cable between the C2 and C3
boards and unplug the ribbon cable between the C1 and
C2 boards. Measure the resistance between pin 1 of
connector P35 on the P board and ground (Chassis)
Yes
Is there a
short
circuit?
The problem could be the C2
board or the panel. Proceed to
isolate the panel from the C2
board to determine which is bad.
Yes
Reconnect P35 and unplug the
ribbon cable between the C2 and
C3 boards. Measure the resistance
between pin 1 of connector P35 on
the P board and ground (Chassis)
No
The problem could be the C3
board or the panel. Proceed to
isolate the panel from the C3
board to determine which is bad.
Replace the P
board
No
Is there a
Yes
short
circuit?
Slide 16