Sony KV43TR27 Service Manual page 16

KV- 13TR27
RM-781 I
4. Confirm that the hold-down circuit does not
operate by performing switchover of the channels
of the dot signals and entirely white signals
several times.
: If the hold-down circuit starts operating in
NOTE
the above case, switch OFF the POWER of
the set immediately.
5. If the above-mentioned steps 1 to 4 are not
satisfied reconfirm steps (2) to (4) by altering the
R568 smaller resistance value (a component
marked with a).
*Use a digital multimeter who& input impedance
is over 100MQ when confirming the voltage of
T P 8 5 .
B+ VOLTAGE CONFIRMATION
The following adjustments should always be perform-
ed w,hen replacing IC601.
1. Supply 130tgV AC to with variable auto-trans-
former.
2. Receive Monoscope signals.
3. Set the PICTURE and BRIGHTNESS controls
in to Initial Reset.
4. Confirm the voltage of pin @ of IC601
than 137.2OV DC.
5. If step 4 is not satisfied, replace IC601
above steps.
is less
and repeat
digital
multimeter
regulated-dc
power supply
digital
multimeter