Yamaha MDX-596, Service Manual

Page: 15 / 59

MDX-596
MDX-596
14
Fig. 11
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.
Oscilloscope
GND CH1 CH2
X Y
IC1201 No.4 pin
GND (TP1202)
IC1201 No.11 pin
EIN (TP1253)
IC1201 No.12 pin
FIN (TP1254)
100K
470p
470p
a
b
Lissajous waveform
a:b = Within 4:1
100K
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
).
Fig. 10
Fig. 12
(Externally attached)
1. Optical pickup rating inspection method
(See page E41/J39)
2
3
1
2
3
1
Check the Lissajous waveform
while adjusting the installation
position by using a screwdriver in
the adjustment hole in the
spindle motor.
Adjustment hole
FFC for 28P extension
TX946220
Mechanism
P.C.B.
MD Main P.C.B.
Connector for 2P extension
AAX16620
From magnetic head
Extension P.C.B. for servicing
(AAX16660)
Install an Extension P.C.B. for servicing
to the mechanism.
FFC for 5P extension
TX946190
From optical pickup
FFC for 6P extension
AAX16640