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B-1
Measure the voltage at pin no. 10 of IC400.
Check that the voltage is GND level when the indicator is between 2 to 6 channel.
Check that the voltage is 4 volt level when the indicator is between 7 to 13 channel.
1) When the voltage appears:
Replace 1C400.
B-2 Measure the voltage at pin no. 15 of IC400.
Check that the voltage is 22V when the indicator is between 2 to 6 channel.
Check that the voltage is GND when the indicator is between 7 to 13 channel.
1) If the voltage appears:
Replace the tuner.
2) Ifthe voltage does not appear:
Replace IC400.
(1) Check that each voltage appears when the power line to the FL trans unit is cut.
No voltage appears: Defective back-light.
(2) Check conductivity of D115.
No conductivity: Replace D115.
(4) Check that the voltage at pin no. 2 of T100 is 6V.
1) Ifnot normal:
Replace D113.
2) If normal:
Replace IC800.
—~15—
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