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– 45 –

This adjustment should be done when replacing the rack assem-
bly on the parts related to it.

Procedure:
1. Fit the EV gear assembly after adjusting its slit position as

shown in the figure. (When the slit position is out of order
after fitting, it can be adjusted finely turning the worm gear of
the ELV motor.)

2. Fit the rack assembly putting it in the arrow A direction. At

this time insert a spacer (approx. 1 mm thickness) or fit the
rack assembly while pushing the EV chassis assembly in the
arrow B direction.

slit

(slit position)

two screws
PTT 2 

×

 4

EV gear ass’y

ELV motor

Note: When this adjustment is out of order, it doesn’t operate nor-

mally and the roaring of the motor can be heard. In this case
adjust again.

rack (110) ass’y

screw
PTT 2 

×

 4

EV chassis ass’y

A

B

– 46 –

3. Press the BACK button on the wireless remote commander

until a beep sounds (for more than 2 seconds).

4. At the same time as a beep, “Test” is displayed at the upper

left of display, and the test mode is activated.

Releasing the Test Mode
1. Press the OFF button on the control unit.
Note: All operations except  OFF  button are done with the wire-

less remote commander.

This set have the test mode function.  In the test mode, FM Auto
Scan/Stop Level and AM Auto Scan/Stop Level adjustments can
be performed easier than it in ordinary procedure.

Setting the Test Mode
1. Press the OFF button on the control unit to turn off the set.
2. Press the following buttons on the wireless remote commander

in the given order.

TUN/AUX button: FM

→

→

LIST

When the tuner unit is defective, replace it by a new one be-
cause its internal block is difficult to repair.

Note: Adjust the tuner section in the sequence shown below.
1. FM Auto Scan/Stop Level Adjustment
2. FM Stereo Separation Adjustment
3. FM Noise Focus Adjustment
4. AM Auto Scan/Stop Level Adjustment

•

In making adjustment, connect the control unit and changer unit.

FM RF signal

generator

Carrier frequency : 97.9 MHz
Output level

: 22 dB (12.6 

µ

V)

Mode

: mono

Modulation

: 1 kHz, 22.5 kHz deviation (30%)

0.01 

µ

F

set

antenna (MAIN) terminal

Adjustment Procedure:
1. Set to the test mode.
2. Press the TUN/AUX button on the wireless remote com-

mander to select FM.

DISPLAY

3. Press the LIST button on the wireless remote commander to

display “PRESET NAME LIST”.

4. Using cursor buttons on the wireless remote commander, se-

lect preset No.3, and press the ENTER button.

DISPLAY

5. Adjust with the volume RV203 on FM/AM tuner unit so that

the “FM” indication turns to “FM0” indication on the display
window.
But, in case of already indicated “FM0”, turn the RV203 so
that put out light “0” indication and adjustment.

DISPLAY

Adjustment Location: Control Unit (FM/AM tuner unit)

(See page 50)

– 47 –

L-CH

L-CH

A

B

R-CH

L-CH

Adjust RV204 on FM/AM

tuner unit for minimum

reading.

R-CH

R-CH

C

D

L-CH

R-CH

Adjust RV204 on FM/AM

tuner unit for minimum

reading.

Note: Make this adjustment after “FM AUTO SCAN/STOP

LEVEL ADJUSTMENT”.

TUN/AUX button: AM

TUN/AUX button : FM

FM RF signal

generator

Carrier frequency : 97.9 MHz
Output level

: 70 dB (3.2 mV)

Mode

: stereo

Modulation

: main: 1 kHz, 33.75 kHz deviation (45%)
  sub: 1 kHz, 33.75 kHz deviation (45%)

19 kHz pilot: 7.5 kHz deviation (10%)

0.01 

µ

F

set

antenna (MAIN) terminal

+
–

         LINE OUT (FRONT) jack

level meter

10 k 

Ω

L-CH Stereo separation: A-B
R-CH Stereo separation: C-D
The separations of both channels should be equal.

Specification: Separation more than 28 dB

Adjustment Location: Control Unit (FM/AM tuner unit)

(See page 50)

TUN/AUX button: FM

FM RF signal

generator

Carrier frequency : 97.9 MHz
Output level

: 60 dB (1 mV)

Mode

: stereo

Modulation

: 1 kHz, 75 kHz deviation

0.01 

µ

F

set

antenna (MAIN) terminal

+
–

LINE OUT (FRONT) jack

level meter

10 k 

Ω

Adjustment Procedure:
1. Tune the set to 97.9 MHz.
2. The then output level is supposing than (A) dB.
3. Adjust with the volume RV205 on FM/AM tuner unit so that

the output level is (A) –32 dB then signal generator input set
to –20 dB.

Adjustment Location: Control Unit (FM/AM tuner unit)

(See page 50)

AM RF signal

generator

Carrier frequency : 1000 kHz
30% amplitude
modulation by
1 kHz signal
Output level

: 33 dB (44.7 

µ

V)

(50 

Ω

)

set

AM dummy antenna

30 

Ω

15 pF

65 pF

antenna (MAIN) terminal

Adjustment Procedure:
1. Set to the test mode. (See page 46.)
2. Press the TUN/AUX button on the wireless remote com-

mander to select AM.

DISPLAY

3. Press the LIST button on the wireless remote commander to

display “PRESET NAME LIST”.

4. Using cursor buttons on the wireless remote commander, se-

lect preset No.3, and press the ENTER button.

DISPLAY

5. Adjust with the volume RV201 on FM/AM tuner unit so that

the “AM” indication turns to “AM0” indication on the display
window.
But, in case of already indicated “AM0”, turn the RV201 so
that put out light “0” indication and adjustment.

DISPLAY

Adjustment Location: Control Unit (FM/AM tuner unit)

(See page 50)

– 48 –

Condition: This adjustment is performed with the set place hori-

zontally.

+
–

TP (TE)
TP (VC)

DRIVER board

oscilloscope

(DC range)

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

DRIVER board.

2. Put the set into play mode by loading the disc (YEDS-18).
3. Press the cursor buttons on the wireless remote commander,

observe the traverse waveform *.

4. Adjust the RV101 on the DRIVER board so that the oscillo-

scope reading is symmetrical in relation to 0 ± 0.05 V.

* Traverse waveform: This is the tracking error waveform appears

when crossing the track.

VOLT/DIV : 1 V (with the 10: 1 probe in use)
TIME/DIV : 2 msec
CENTER : 0 ± 0.05 V

Connection and Adjustment Location: DRIVER board

(See page 50)

Notes:
1. Perform adjustments in the order given.
2. Use YEDS-18 disc (Part No.: 3-702-101-01) unless otherwise

indicated.

3. Use the oscilloscope with more than 10 M

Ω

 impedance.

4. Power supply voltage requirement: DC 14.4 V

(more than 3 A)

5. In making adjustment, connect the control unit and changer

unit.

Condition: This adjustment is performed with the set placed hori-

zontally.

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

DRIVER board.

2. Put the set into play mode by loading the disc (YEDS-18).
3. Adjust the RV102 on the DRIVER board so that the waveform

on the oscilloscope (eye pattern) is good.
A good eye pattern means that the diamond shape (≈) in the
center of the oscilloscope can be clearly distinguished.

•

+
–

TP (RF)
TP (VC)

DRIVER board

oscilloscope

(AC range)

VOLT/DIV : 200 mV (with the 10: 1 probe in use)
TIME/DIV : 0.5 µsec

1.1      Vp-p

+0.3
–0.2

Note: When observing the eye pattern, set the oscilloscope to

AC range and raise the vertical sensitivity so that it may
be easily seen.

Connection and Adjustment Location: DRIVER board

(See page 50)













A

B 

0 

±

0.05 V

C=1.8 

±

 0.3 V

traverse waveform
(100 track jump waveform)

C