Yamaha GX-900 Service Manual page 16

GX-900
Removal of Mechanism SW P.C.B. (Fig.20)
• Once the mechanism switch P.C.B. is removed, it will
be necessary to perform "Adjustment of Lead-in Switch
Position". (See page 34.)
1. Remove 2 screws (E1) and then remove the Mecha-
nism SW P.C.B.
Installation of Mechanism SW P.C.B.
• Set the mechanism to the eject mode by applying -5V
to the loading motor.
• Install the mechanism SW P.C.B. so that the boss fits
in the hole in it.
• Push the lead switch on the mechanism SW P.C.B.
toward the optical pickup side (so that looseness in the
boss hole is eliminated).
• Tighten screws and apply thread lock.
• Measure the lead-in switch position. (See page 34.)
(Enter the result in EEPROM.)
Removal of Sled Motor/Loading Motor (Fig.21)
1. Remove 4 screws (D1) and then remove the sled
motor/loading motor.
Use care so as not to cause any damage to the gear.
(The damaged gear will cause abnormal noise to occur
while searching.)
15
Caution
(E1)x1
Ø1.7x3mm
(E1)x1
Ø1.7x9.5mm
Mechanism SW P.C.B.
(D1)x2
Ø1.7x2mm
Loading Motor
(E1)x1
Ø1.7x9.5mm
Mechanism SW P.C.B.
Fig.20
(E1)x1
Ø1.7x3mm
Lead-in switch
(D1)x2
Ø1.7x2mm
Sled motor
Fig. 21