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– 5 –

Note: Follow the assembly procedure in the numerical order given.

3

Install the knob (TUNE) with
board shape position as shown
in Figure.

4

Install the knob (VOL)
with making position as
shown in Figure.

5

Turn CV1 and RV1 shaft in
the arrow direction fully.

6

radio board

board shape

pointer

claw

A

knob (tune)

CV1

RV1

1

pointer

radio board
(Component side)

2

Set the pointer part 

A

portion to claw of chassis.

Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally done
by the trimmer capacitors.

– 6 –

Setting:
BAND switch: FM

Setting:
BAND switch: MW/LW

+
–

0.01 µF

+
–

AM RF SSG

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

set

speaker terminal

level meter

Put the lead-wire an-
tenna close to the
set.

± 22.5 kHz frequency
deviation by 400 Hz
signal

FM RF SSG

set

speaker terminal

level meter

FM lead wire antenna terminal

+
–

frequency counter

IC2 pin 

!ª

10 pF

FM  FREQUENCY  COVERAGE  ADJUSTMENT

Adjust for a maximum reading on level meter.

L4

CT4

86.5 MHz

109.5 Hz

FM  TRACKING  ADJUSTMENT

Adjust for a maximum reading on level meter.

CT3

Frequency max

MW  FREQUENCY  COVERAGE  ADJUSTMENT

Adjust for a maximum reading on level meter.

L2

CT2

520 kHz

1,650 Hz

MW  TRACKING  ADJUSTMENT

Adjust for a maximum reading on level meter.

L1-1

CT1

600 kHz

1,400 Hz

LW  FREQUENCY  COVERAGE  ADJUSTMENT

Adjust for a maximum reading on level meter.

CT6

Frequency min

AM  IF  ADJUSTMENT

Adjust for a maximum reading on level meter.

T1

455 kHz

LW  TRACKING  ADJUSTMENT

Adjust for a maximum reading on level meter.

L1-2

CT5

160 kHz

240 Hz

Confirm that the reading on the frequency counter is 4,800 ± 400
Hz.
If frequency is higher, change capacitor value of CV27.
If frequency is lower, change resistor value of R8.

 RADIO board (Component Side)

L1–1: MW TRACKING

ADJUSTMENT

L1–2: LW TRACKING

ADJUSTMENT

CT3: FM TRACKING

ADJUSTMENT

CT1: MW TRACKING

ADJUSTMENT

CT2: MW FREQUENCY

COVERAGE
ADJUSTMENT

CT6: LW FREQUENCY

COVERAGE
ADJUSTMENT

L2: MW FREQUENCY

COVERAGE
ADJUSTMENT

CT4: FM FREQUENCY

COVERAGE
ADJUSTMENT

L4: FM FREQUENCY

COVERAGE
ADJUSTMENT

T1: AM IF

ADJUSTMENT

IC1

CT5: LW TRACKING

ADJUSTMENT

– 7 –

– 8 –

D1

H-8

D2

H-8

D3

H-7

D4

G-7

D5

G-8

D6

F-7

IC1

D-4

IC2

H-5

Q1

F-3

Q2

D-8

Q3

C-6

Q4

C-6

Ref. No. Location

•

X

: parts extracted from the component side.

•

Y

: parts extracted from the conductor side.

•

¢

: internal component.

•

b

: Pattern from the side which enables seeing.

– 9 –

– 10 –

•

All capacitors are in µF unless otherwise noted.  pF: µµF 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.

•

¢

: internal component.

•

C

: panel designation.

•

U

: B+ Line.

•

H

: adjustment for repair.

•

Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(

) : MW/LW

∗

: Impossible to measure

•

Voltages are taken with a VOM (Input impedance 10 M

Ω

).

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

•

Signal path.

F

: FM

f

: MW/LW

Note: The components identified by mark 

!

 or dotted line

with mark 

!

 are critical for safety.

Replace only with part number specified.

•

1

2

3

4

5

6

7

8

9

10

15

14

13

12

11

FM

DISCRIMINATOR

AF POWER AMP

AM FE

FM IF

TUNING

METER

AM IF DET AGC

FM FE

23

22

21

20

24

25

19

18 17 16

29 28 27 26

30

GND

GND

AF OUT

VCC

RIPPLE

FIL

TER

AF IN

DET OUT

AFC AGC

AFC AGC

IF GND

METER

N.C

FM IF IN

AM IF IN

FM/AM BAND

SELECT

FM/AM

IF OUT

FE GND

N.C

AM RF IN

FM RF

REG OUT

FM OSC

FM RF IN

AFC

AM OSC

VOL

NF

FM DISCRI

GND

GND