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9

Procedure :
    Mode : playback

               2,910 to 3,090Hz

Frequency difference between the begining and the end of the
tape should be within 1% (30Hz)

tape speed adjustment
control inside motor

set

test tape
WS-48B
(3kHz, 0dB)

32

Ω

digital frequency

counter

phones jack

10

BAND Switch

: MIN

FINE TUNE control

: mechanical center

BAND Switch

: SW1, SW2

FINE TUNE control

: mechanical center

BAND Switch

: FM

FINE TUNE control

: mechanical center

(

) : Saudi Arabia model

AM IF ADJUSTMENT

Adjust for a maximum reading on level meter.

T1

455kHz

MW FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L4

520kHz

CT4

1,680kHz

MW TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L3

620kHz

CT3

1,400kHz

SW1 FREQUENCY COVERAGE ADJUSTMENT

Adjust for a maximum reading on level meter.

L6

2.2MHz

CT6

7.3MHz

SW1 TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L5

2.2MHz

Confirmation

7.3MHz

SW2 FREQUENCY COVERAGE  ADJUSTMENT

Adjust for a maximum reading on level meter.

L8

6.8MHz

CT8

22.5MHz

SW2 TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L7

6.8MHz

Confirmation

22.5MHz

FM FREQUENCY COVERAGE  ADJUSTMENT

Adjust for a maximum reading on level meter.

L2

86.5MHz (87.35MHz)

CT2

109.5MHz (107.8MHz)

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter.

L1

86.5MHz (87.35MHz)

CT1

109.5MHz (107.8MHz)

AM RF signal
generator

30% amplitude modulation by
 400Hz signal.
Output level : as low as possible

telescopic
antenna
terminal

12PF

Adjustment Location : Mechanism deck

z 

Switch location

   FUNCTION switch................ TAPE (RADIO OFF)
   SOUND SELECT.................. FLAT
   VOLUME.............................. mechanical center
   MEGA BASS......................... OFF

Ω

µ

• Repeat the procedures in each adjustment several times, and the

frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.

11

1. Connect the frequency counter to 4 and 7 pins of IC1 as

shown the figure.

2. Turn the set to 98MHz.
3. Adjustment RV1 for 76kHz 

±

 500Hz reading on frequency

counter.

telescopic

antenna
terminal

FM RF signal

generator

Carrier frequency  : 98MHz

Modulation  : no modulation

Output level  : 0.032V (90dB)

0.01

µ

F

set

C14

C15

C000

C000

C18

C20

C19

C5

R7

R8

R24

R11

R9

R16

R6

R4

R5

C4

C16

C17

C31

CF1

C9

C13

VR1

FINE

L2

B

C

E

Q2

IC1

TUNER BOARD  
(Conductor side)

CN304

1

6

1

4

7

15

16

30

CF3

frequency

counter

1

µ

F

+
33k

Ω

CT2 : FM Frequency Coverage Adjustment

L2 : FM Frequency Coverage Adjustment

CT4 : MW Frequency Coverage Adjustment

T1 : AM IF Adjustment

L3 : MW Tracking Adjustment

CT3 : MW Tracking Adjustment

CT1 : FM Tracking Adjustment

L1 : FM Tracking Adjustment

L4 : MW Frequency Coverage Adjustment

L8 : SW2 Frequency Coverage Adjustment

CT8 : SW2 Frequency Coverage Adjustment

CT6 : SW1 Frequency Coverage Adjustment

L6 : SW1 Frequency Coverage Adjustment

RV1: FM  VCO Adjustment

L7 : SW2 Tracking Adjustment

L5 : SW1 Tracking Adjustment

(Component side)

TUNER BOARD  

12

POWER BOARD

LED BOARD

TUNER BOARD

GE SW BOARD

VOL BOARD

MEGA BASS SW BOARD

MIC BOARD

MAIN BOARD

Note:
• All capacitors are in 

µ

F unless otherwise noted.  pF: 

µµ

F

50 WV or less are not indicated except for electrolytics
and tantalums.

• All resistors are in 

Ω

 and 

1

/

4

 

W or less unless otherwise

specified.

Note:
The components identified by mark 

!

 or dotted

line with mark 

!

 are critical for safety.

Replace only with part number specified.

 •

A

: B+ Line.

•

H

: adjustment for repair.

• Power voltage is dc 9V and fed with regulated dc power

supply frombattery terminal .

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

no mark

: FM (RADIO SECTION), PLAY (TAPE SEC-

TION)
(           ) :  MW  (RADIO  SECTION),  REC  (TAPE  SEC-
TION)
<         > : SW1,2

• Voltages are taken with a VOM (Input impedance 10 M

Ω

).

Voltage variations may be noted due to normal produc-
tion tolerances.

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal produc-
tion tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F

: FM

f

: AM

E

: PB

a

: REC

J

: CD/TV LINE IN

• Abbreviation

EA:Saudi Arabia