3.2.3.2 Vertical Sync Unstable
Check the vertical sync signal.
Check the vertical sync. or Vsync-out at Pin 32 of IC102.
Expected failure point
Signal cable, IC102, IC105 or peripheral circuits
OK
NG
Expected failure point
The vertical oscillation circuit is failure. (See Item 3.4.3)
Expected failure point
IC102 on MAIN PWB or peripheral circuits
NG
Check the vertical sync signal.
Check the (V-SYNC) waveform at Pin 5 of CN103
on the MAIN PWB (Approx. 5Vp-p).
Vertical
period
OK
NG
Check the vertical sync signal.
Check the (V-SYNC) waveform at Pin 15 of CN212 on the VIDEO
PWB. (Approx. 5Vp-p)
Vertical
period
Expected failure point
CN103 or FFC cable
NG
OK
Expected failure point
Signal cable, IC216 or peripheral circuits
OK
Check the (V-SYNC) waveform at Pin 33 of IC102 on the
MAIN PWB. (Approx. 5Vp-p)
3-6
Summary of Contents for DPro2070SB
Page 22: ...1 15 Fig 7 The principle of DDCC compensation ...
Page 23: ...1 16 Fig 8 a DDCC adjustment item ...
Page 24: ...1 17 Fig 8 b DDCC adjustment item ...
Page 25: ...1 18 Fig 9 DDCC circuit diagram ...
Page 103: ...4 Wave form 1 POWER 2 CONTROL MAIN 3 DEFL MAIN 4 DEFL SUB COIL DRIVE MAIN 5 VIDEO ...
