Display Signal Circuit between Video Terminal and Television Display: Procedure

1. Disconnect the U2 television display assembly connector.
   Fig 1: Checking Television Display Assembly With Waveform

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2. Using an oscilloscope, check the signal waveform between each terminal and the body ground according to the conditions, as shown in the chart below.
   SIGNAL WAVEFORM (REFERENCE)
   
   

   Tester Condition	Content
   Terminal No. (Symbols)	U2-2 (VV+) - U2-10 (VV-)
   Tool Setting	0.2 V/DIV., 100 μsec./DIV.
   Condition	External device playing (When VTR terminal used)

   OK

   Waveform is as shown in the illustration.

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Television Display Assembly)
   *a	Video Waveform
   *b	Synchronization Signal

NG → See step   2 

OK → See step   3 

1. Disconnect the P3 video terminal connector.
2. Disconnect the U2 television display assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P3-5 (VV+) - U2-2 (VV+)	Always	Below 1 Ω
   P3-6 (VV-) - U2-10 (VV-)	Always	Below 1 Ω
   U2-2 (VV+) - Body ground	Always	10 kΩ or higher
   U2-10 (VV-) - Body ground	Always	10 kΩ or higher
   U2-9 (KLK) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4