Display Signal Circuit between Video Terminal and Television Display [08/2015 - 08/2019]: Procedure
- CHECK HARNESS AND CONNECTOR (TELEVISION DISPLAY ASSEMBLY - VIDEO [VIDEO ADAPTER] TERMINAL)
- Disconnect the U13 television display assembly connector.
- Disconnect the S5 video (video adapter) terminal connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition U13-18 (ADPI) - S5-8 (ADPG) Always Below 1 Ω U13-24 (VD) - S5-5 (VV+) Always Below 1 Ω U13-25 (VG) - S5-6 (VV-) Always Below 1 Ω U13-23 (SGN5) - S5-7 (SG) Always Below 1 Ω U13-18 (ADPI) - Body ground Always 10 kΩ or higher U13-24 (VD) - Body ground Always 10 kΩ or higher U13-25 (VG) - Body ground Always 10 kΩ or higher U13-23 (SGN5) - Body ground Always 10 kΩ or higher
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 2
- CHECK VIDEO (VIDEO ADAPTER) TERMINAL
- Remove the video (video adapter) terminal connector still connected (Refer to DISASSEMBLY [08/2015 - 08/2019]
).
- Using an oscilloscope, check the waveform.MEASUREMENT CONDITION
Item Content Terminal No. (Symbol) S5-5 (VV+) - Body ground Tool Setting 0.2 V/DIV., 0.2 μs./DIV. Condition External device playing, VTR displayed OK
Waveform is as shown in the illustration.
TEXT IN ILLUSTRATION*a Component with harness connected
(Video [Video Adapter] Terminal)
Result:
OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
(Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2019] )
Result:
NG
REPLACE VIDEO (VIDEO ADAPTER) TERMINAL
(Refer to DISASSEMBLY [08/2015 - 08/2019] )
- Remove the video (video adapter) terminal connector still connected (Refer to DISASSEMBLY [08/2015 - 08/2019]
).