Sharp 8C221 Service Manual page 22

P-l F Circuit
l
. T u n e r
B power supply circuit for
the tuner
Normal (&. 3.6V)
Check for the
voltage at B4
terminal.
I
I
to the pin 1 of 1201, does
noise appear on the screen?
Yes
Make the pin 9 of
and check for the
voltage of TP205.
I
1
N o
Check for the voltage at the
base, collector and emitter
of Q207.
Normal Abnormal
I I
I