Samsung MM-28 Service Manual page 26

6-3 CD
6-3-1 Revolution Malfunction
Does Laser function during
Check NIC9286 pin73 voltage
Replace NIC9223 or NIC9258
Samsung Electronics
POWER ON
Yes
Check Deck down
Yes
Check CLOSE S/W voltage.
CLOSE condition: 0V
Yes
Does Roulette revolve ?
Yes
Is Roulette Control ok ?
Yes
Is Focus Search ok ?
Yes
Focus Search ?
Yes
during Focus Search
: 5V
Yes
No
Check UP/DOWN MOTOR
No
Check CLOSE MOTOR
and CLOSE S/W.
No
Check Roulette Motor.
No
Check Roulette Control Sensor
No
Check oscillation of NXF100
(16.9344MHZ)
No
Replace PICK UP
No
Replace NIC9286
Troubleshooting
6-5