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Service Manual
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• Using set the Input A sensitivity to 200 mV/div.
• Using
select 20 µs/div.
• Press
to enable the arrow keys for selecting the video line number.
• Using
select the line number:
622 for PAL or SECAM
525 for NTSC.
3. Set the TV Signal Generator to source a signal with the following properties:
• the system selected in step 2
• gray scale
• video amplitude 1V (5 divisions on the test tool)
• chroma amplitude zero.
4. Observe the trace, and check to see if the test tool triggers on line number:
622 for PAL or SECAM, see Figure 4-9
525 for NTSC, see Figure 4-10.
Note
Numerical readings in the pictures shown below may deviate from those
shown in the test tool display during verification.
PAL622.BMP
Figure 4-9. Test Tool Screen for PAL/SECAM
line 622
NTSC525.BMP
Figure 4-10. Test Tool Screen for NTSC line
525
5. Using select the line number:
310 for PAL or SECAM
262 for NTSC
6. Observe the trace, and check to see if the test tool triggers on:
line number 310 for PAL or SECAM, see Figure 4-11.
line number 262 for NTSC, see Figure 4-12.
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