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TROUBLE SHOOTING GUIDE (continued)
8.
The circuits are changed over but the display LED does not go on or out.
Check Pin 23 ~ Pin 27
of 1CO2 LC7815.
See the illustration below.
Check DO1 to DO4
and the circuit.
e Diode is opened.
e Solder touch, broken pattern
e +B wiring pattern
IC Pin Numbers
PHONO lamp: ON
TUNER lamp: ON
AUX lamp: ON
TAPE lamp: ON
TAPE tome: OFF |
TAPE lamp: OFF
+11.5V
C7815
—
a
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