— 14 —
Press "Hall" button.
Does the LED light up?
Measure voltage at pin 9 of CA
connector.
Is the voltage +5 V?
Is a noise made?
Touch pin2 of CF connector
with test rod (+).
Is a noise made?
Set main volume to maximum.
Touch pin1 of CA connector
with test rod (+) of multimeter
in resistance range, connecting
test rod (-) to ground.
Check main volume and
connection to the volume.
Replace MA1M PCB.
Follow from (A) of "No sound"
troubleshooting.
No
Yes
Yes
Yes
Yes
No
No
No
Replace PS2M PCB.
2. No sound
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