Yamaha MDX-596 Service Manual page 15

MECHANISM ADJUSTMENT
When making an adjustment, be sure to connect an extension cable for servicing and an expansion P.C.B. as shown in
Fig.12.
1. Optical pickup rating inspection method
(Externally attached)
GND (TP1202)
IC1201 No.4 pin
100K
EIN (TP1253)
IC1201 No.11 pin
470p
470p
FIN (TP1254)
100K
IC1201 No.12 pin
(See page E41/J39)
Fig. 10
After performing automatic adjustment in the AUTO mode
selected from the test mode by using a TDYS1 (SONY) (P/
No. TX945850) disc for reproduction (COMPLETE status
on display), adjust the EOUT to FOUT Lissajous waveform
(x-y).
1. Loosen 3 screws of the spindle motor a little and make
adjustment while watching the Lissajous waveform.
2. After adjustment, tighten screws in the order of (q), (w)
and (e).
From magnetic head
Extension P.C.B. for servicing
(AAX16660)
Install an Extension P.C.B. for servicing
to the mechanism.
Oscilloscope
a
GND CH1 CH2
b
X Y
Lissajous waveform
a:b = Within 4:1
FFC for 28P extension
TX946220
FFC for 6P extension
AAX16640
FFC for 5P extension
TX946190
2
1
3
Adjustment hole
Fig. 11
Connector for 2P extension
AAX16620
Mechanism
P.C.B.
MD Main P.C.B.
Fig. 12
MDX-596
2
3
1
Check the Lissajous waveform
while adjusting the installation
position by using a screwdriver in
the adjustment hole in the
spindle motor.
14