Stereo Troubleshooting - Yamaha LST1200X1999 Service Manual

7
ELEC

STEREO TROUBLESHOOTING

Stereo does not come on.
1 Check:
G
Fuses and breakers
Out of specification ➔ Replace
G
2. Measure voltage to stereo
Out of specification ➔
G
Check switch and wiring
Disconnect Remote Keypad and retest
Replace stereo
Stereo Voltage
Red (R) ~ Black (B)
Yellow (Y) ~ Black (B)
No sound
1. Check:
G
Speakers and wiring
Attenuator button
Press reset button
Disconnect Remote Keypad and retest
Replace stereo
Stereo does not respond
G
Press the reset button
Disconnect Remote Keypad and retest
Replace stereo
ELECTRICAL SYSTEM
12VDC
32