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TROUBLESHOOTING
PRODUCT SAFETY NOTE
The shaded and
! A
marked components
have special characteristics
important to safety.
Read carefully the product safety notice of each service manual. Don't degrade the safety
of the receiver through improper servicing when replacing any of this components.
HOW TO USE FLOW CHART
(1) The flow chart shows the following:
Normal (5.7V)
Q305, IC501, FBT
CPT Heater
This shows the name of the
-
faulty circuit and main parts
to be checked.
This shows the point to be checked
(2) The voltage shown in the chart may differ to some extent depending on the condition of the set and tester.
PRECAUTION
ON MAKING MEASUREMENTS
AND ON HANDLING
1. When any parts become abnormally hot or there is a smell of burning, cut off the power immediately.
2. Do not make shorts between circuits or across terminals except for those specified.
3. When measuring the voltages of KS and TRs, be careful that the test lead of the tester does not touch any
other terminal.
4. Measure the voltage correctly.
5. Measure the resistance over a small range.
6. Be sure to switch off the power when replacing parts.
7. Do not apply a soldering iron for a long time when replacing parts. (Use a solder-wick.)
8. Use an isolation transformer when troubleshooting.
115
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