Yamaha MDX-9 Service Manual download pdf (Page 15)

MDX-596

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

IC1201 No.4 pin

GND (TP1202)

IC1201 No.11 pin

EIN (TP1253)

IC1201 No.12 pin

FIN (TP1254)

100K

470p

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)

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

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Yamaha MDX-9 Service Manual Page 15

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