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17

1

Confirm that the slider moves in the direction of arrow 

C

 to move down

the chuck plate if the gear (LOAD CAM) is rotated in the direction of arrow

A

 or the chuck plate moves up and the slider moves in the direction of

arrow 

D

 if the gear is rotated in the direction of arrow 

B

.

chuck plate

slider

gear (LOAD CAM) assy

A

B

C

D

18

This adjustments is necessary when the system controller (IC201),
variable resistor (RV201), slider (R), slider (L), or chassis (ELV)
was replaced for any repair.

Adjustment Method:
1. Load a disc magazine, and place the set vertically as shown

below.

2. Connect the regulated power supply, and turn the power on.

3. Press the DISC button on the wired remote commander (RM-

X80RF) and select DISC 5.

4. At this time, if the elevator shaft does not position between

comb teeth A and B at addresses 5 and 6 as shown below,
adjust the following.

5. Press repeatedly the DISC + and – buttons on the wired re-

mote commander (RM-X80RF) so that the elevator shafts
moves from address 6 to address 5, or from 5 to 6. At this
time, adjust RV201 on the main board so that the elevator shaft
positions smoothly between comb teeth A and B.

6. Further, place the set horizontally and make same adjustment

as mentioned above.

7. After adjustment at addresses 5 to 6 is finished, check all op-

erations from addresses 1 to 10 with the set placed vertically
and horizontally respectively to confirm that the elevator shaft
positions in a range between comb teeth A to B.

power supply

(DC 14.4 V)

compact disc changer

wired remote commander

(RM-X80RF)

GND

+

DISPLAY connector (CN302)

POWER connector (CN303)

19

1. This adjustment is performed with the set placed horizontally.
2. Power supply voltage: DC14.4 V (more than 3 A).
3. Be sure to use the disc “YEDS-18” parts code: 3-702-101-01, but only

when indicated.

Procedure:
1. Connect the oscilloscope to TP (RFO) and TP (VC) on the RF

board.

2. Put the set into play mode by loading the disc (YEDS-18).
3. Confirm that oscilloscope waveform is clear and check RF

signal level is correct or not.

Clear RF signal waveform means that the shape “

◊

” can be clearly distin-

guished at the center of the waveform.

When observing the eye pattern, set the oscilloscope to AC range
and raise the vertical sensitivity so that it may be easily seen.

power supply

(DC 14.4 V)

compact disc changer

wired remote commander

(RM-X80RF)

GND

+

DISPLAY connector (CN302)

POWER connector (CN303)

±

20

Procedure:
1. Connect the oscilloscope to TP (TE) and TP (VC) on the RF

board.

2. Put the set into play mode by loading the disc (YEDS-18).
3. Rotate the 

[     AMS     ]

 dial on the wired remmote com-

mander, and check the traverse waveform*.

4. Confirm that the oscilloscope waveform is symmetrical on the

top and bottom in relation to 0 V dc, and check this level.

* Traverse waveform: This is the tracking error wave form appears

when crossing the track.

oscilloscope

(DC range)

+
–

TP (VC)

TP (TE)

IC101

A

B 

0 V

A=B

traverse waveform
(100 track jump waveform)

VOLT/DIV: 500 mV
TIME/DIV: 2 ms
Center: 0 V

Traverse waveform

.

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