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49

10.5. Checking & Repairing CD

Servo P.C.B.

Step 1 : Remove the Top Cabinet Assembly.
Step 2 : Remove the Main P.C.B..
Step 3 : Remove the CD Mechanism Unit.
Step 4 : Attach original cable with extension cable REXN0084
(10P cable from JW830 on Deck P.C.B. to CN2104 on Main
P.C.B.).

Step 5 : Connect 4P cable at the connector (CN4104) on the
Main P.C.B..
Step 6 : Connect 10P cable at the connector (CN2105) on the
Main P.C.B..
Step 7 : Connect 8P cable at the connector (CN4100) on the
Main P.C.B..

Step 8 : Place the insulating material as shown in the diagram.
Step 9 : Connect 22P FFC at the connector (CN2101) on the
Main P.C.B..
Step 10 : Check and repair the CD Servo P.C.B. according to
the diagram shown.

50

11 Measurements and Adjustments

11.1. Tuner Section

G AM-RF ALIGNMENT

G FM-RF ALIGNMENT

READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT

1. Set selector switch to AM, FM and TAPE.
2. Set volume level to maximum.
3. Output of signal.

Signal Generator or Sweep Generator

Radio Dial Setting

Indicator (Electronic Voltmeter 

or Oscilloscope)

Adjustment

(Shown in Fig.1)

Remarks

Connections

Frequency

Fashion a loop of 

several

turns of wire and 

radiate a signal into 

loop ant. of receiver.

540 kHz

Point of noninterference. 

(on/about 600kHz).

Headphone Jack (32

Ω)

Fabricate the plug as shown in 

Fig.2 and then connect the lead 
wires of the plug to the measur-

ing instrument.

[*1] L51 (AM ANT Coil)

Adjust for maxi-

mum output.

Fashion a loop of 

several

turns of wire and 

radiate a signal into 

loop ant. of receiver.

522 kHz

Point of noninterference. 

(on/about 600kHz).

Headphone Jack (32

Ω)

Fabricate the plug as shown in 

Fig.2 and then connect the lead 
wires of the plug to the measur-

ing instrument.

L7 (AM OSC)

Adjust for maxi-

mum output.

Fashion a loop of 

several

turns of wire and 

radiate a signal into 

loop ant. of receiver.

1404 kHz

Point of noninterference.

Headphone Jack (32

Ω)

Fabricate the plug as shown in 

Fig.2 and then connect the lead 
wires of the plug to the measur-

ing instrument.

CT51 (AM OSC)

Adjust for maxi-

mum output.

[*1] Fix antenna coil with after completing alignment.

Signal Generator or Sweep Generator

Radio Dial Setting

Indicator (Electronic Voltmeter 

or Oscilloscope)

Adjustment

(Shown in Fig.1)

Remarks

Connections

Frequency

Fashion a loop of 

several

turns of wire and 

radiate a signal into 

loop ant. of receiver.

90 MHz

Point of noninterference.

Headphone Jack (32

Ω)

Fabricate the plug as shown in 

Fig.2 and then connect the lead 
wires of the plug to the measur-

ing instrument.

[*1] L5 (FM ANT Coil)

Adjust for maxi-

mum output.

[*1] Fix antenna coil with after completing alignment.

51

52

11.2. Deck Mechanism Section

G HEAD AZIMUTH ALIGNMENT

CAUTION :

• Please remove the screw-locking bond left on the head base when replacing the azimuth screw.
• After the adjustment, apply screwlock to the azimuth adjusting screw. (Screw-locking bond: RZZ0L01).
• Minimum screw-lock apply on screws must be 180

° around the screw.

G TAPE SPEED CHECKING

TEST TAPE

INDICATOR (ELECTRONIC VOLTMETER 

or OSCILLOSCOPE)

ADJUSTMENT

REMARKS

QZZCAB

(~ 3 dB)

Headphone Jack (32

Ω )

Fabricate the plug as shown in Fig.3 and 

then connect the lead wires of the plug to 

the measuring instrument.

Azimuth Screw

(Shown in Fig.4)

1. Insert the test tape (QZZCAB) and start playback at 
maximum volume & equalize at “FLAT”.
2. Adjust the azimuth screw for maximum waveform on the 
oscilloscope and the similar output on L and R channels.
3. When adjusting the azimuth in the reverse direction, 
repeat the adjustment several times because of a little slip 
on the forward direction side.

TEST TAPE

EQUIPMENT CONNECTION 

ELECTRONIC COUNTER

ADJUSTMENT

SPECIFICATION

REMARKS

QZZCWAT

(3 kHz, -10 dB)

Headphone Jack (32

Ω )

Fabricate the plug as shown in 

Fig.5 and then connect the lead 
wires of the plug to the measur-

ing instrument.

Motor VR.

(Shown in Fig.6)

3000±90Hz

1. Insert the test tape (QZZCWAT) and start playback.
2. Check the output at headphone or speaker.