Nokia 447ZiPlus Service Manual page 34

17” colour monitor
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(7) No Vertical Scanning (One Horizontal Line)
No
R334 is defective.
No
Check R347, R348
No
Check C302, C338,
R347, R348
No
Check C328
No vertical scanning
Is the
waveform at
Pin 5 of I330
normal ?
No
Are the
voltages at Pin
2 of I330 14V
Pin 4 of I330
-9V ?
Yes
Is the
voltage at Pin 7 of
I330 normal
(1.8V) ?
Yes
Is the
waveform at
Pin 23 of I401
normal
?
No
Is the voltage
at Pin 21 of
I401 normal
?
Yes
voltage at Pin
22 of I401
normal
?
Yes
I401 is defective
32
Yes
Deflection yoke is defective.
Yes
I330 is defective.

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