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6

6

eight

 screws

     (+BVTP 3

 

×

 12)

2

three

 screws

     (+P 3

 

×

 10)

4

two

 screws

     (+P 3

 

×

 10)

1

reflector

8

connector

     (CN203)

7

connector

     (CN802)

3

jack holder

5

stand

rear cabinet section

9

front cabinet section

2

two claws

4

nickel. cadmium battery

3

retainer board

1

screws

     (+BVTP 3

 

×

 10)

5

two screws

     (+BVTP 3

 

×

 10)

6

speaker (057F022)

front cabinet

7

1

connector (CN302)

7

connector (CN801)

8

connector

     (CN804)

qa

connector

     (CN101)

qs

antenna

qd

RX board

4

connector (CN304)

6

cabinet

     (top section)

2

connector

     (CN301)

3

power button

q;

JACK board

5

two

 screws

     (+BVTP 3

 

×

 10)

9

screw (DIA. 12)

   

rear cabinet

3

CHARGE board

5

SW board

2

connector (CN303)

1

screw

     (+P 2.6

 

×

 4)

4

two screws

     (+P 2.6

 

×

 6)

top cover section

8

6

AMP board

8

MEGABASS board

7

Remove eight solderings.

2

connector (CN202)

9

connector (CN304)

5

connector (CNP201)

4

connector (CNP202)

qa

REFLECTOR board

3

screw

     (+P 2.6

 

×

 6)

q;

screw

     (+P 2.6

 

×

 6)

1

power button

1

screw

     (+BVTP 3

 

×

 10)

8

screw

     (+BVTP 3

 

×

 10)

2

screw

     (+P 2.6

 

×

 6)

9

screw

     (+P 2.6

 

×

 6)

3

Remove two solderings.

4

herness

qa

herness

6

MDD holder (R)

qd

MDD holder (L)

7

drive (030F034)

qf

drive (030F034)

5

grille (DIA. 30)

qs

grille (DIA. 30)

q;

Remove two solderings.

When you remove a Cautions : (R) side, please start with 

1

, when you remove the (L) side, please start with 

8

.

9

AF signal 
generator 

Telescopic
antenna

8 cm

L-CH (J402)

TMR-RF80

set 

TMR-RF80

set 

Frequency counter 

(Component side)

S402

J402

(L-CH) (R-CH)

CH3 

←

CH2 

←

CH1

RV403: Modulation adjustment

VCO UNIT

RV403

digtal voltmeter

(AC range)

 (Conductor side)

TX BOARD

TX BOARD

Transmission Frequency Check and Adjustment
1. Set the  NOISE FILTER  switch to OFF.
2. Input a signal of 1 kHz 40 mVrms to only the L-CH (J402).
3. Connect a telescopic antenna to the frequency counter input and

extend the antenna to a length of approximately 8 cm.

4. Place TX board close to the frequency counter, then measure the

frequencies of CH1, CH2 and CH3 and make sure the values are
as follows:

CH1 : 863.5 MHz ± 40 kHz
CH2 : 864.0 MHz ± 40 kHz
CH3 : 864.5 MHz ± 40 kHz

When the frequency is not satisfied the specified value, set the
 CHANNEL  switch (S402) to CH2, then adjust the value of the
frequency counter to 914.0 MHz by trimmer capacitor in the VCO
unit.

Standard value :913.9MHz to 914.1MHz

When completed with replacement, recheck the
frequencies of CH1, CH2 and CH3.

Modulation Check and Adjustment
1. Set the channel to CH2.
2. An electric wave is output for 4 or 5 minutes when OFF to ON a

power supply (Power indicator will ON).

3. Measure the center terminal of RV403 using an digital volt-meter

(AC range) and make sure the value is 2 to 2.5mVrms.
If the measured value is other than the specified value, adjust to
2 to 2.5mVrms by turning the RV403 on the TX board.