FLOW CHART NO.22: NTSC SKEW TROUBLESHOOTING
YES
NO
YES
YES
YES
NO
NO
NO
Check the peripheral circuit of Q4264.
Replace IC4261.
Replace defective parts.
YES
NO
Is there a picture signal inputted to the
pin(12) of IC4261?
Insert the NTSC system recorded tape and put the unit in the NTSC playback mode.
Is there a picture signal outputted from
the pin(8) of IC4261?
Is there a picture signal inputted to the
pin(9) of IC4261?
Is there a picture signal outputted from
the pin(10) of IC4261?
Check PC 5V line.
Is the supply voltage at pins (3) and (4)
of IC4261.
Check EQ amplifier amplifier circuit.
(Check Q4261, Q4262)
Does the circuit around pins (14), (15)
and (16) of IC4261 operate normally?
NO
NO
Is there H level at pin(13) of IC4261.
Check line between pin(13) of IC4261
and pin(9) of IC701.
YES
No NTSC SKEW function (PAL playback mode is possible).
To Next Page
Loading...
