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5

6

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

1

5

7

6

2

3

4

1

8

6

2

3

4

5

7

7

1

2

3

1

2

5

8

7

4

6

9

0

3

8

Note : The Bias adjustment should be performed only if any of

Q109, Q110, Q113, Q209, Q210, Q213, Q309, Q310, Q311
Q409, Q411 and Q413 are replaced.

Procedure :
1. Rotate the variable resistors RV104, RV204, RV304 and RV404

fully in the counterclockwise direction to minimize the idling
current of the stabilized power supply.
(The direction of rotation is based on the component side.)

2. The input signal is to be no signal.
3. Set the power voltage to +14.4 V, and turn the remote mode ON

(Connect between the REM terminal and B+ terminal).

4. Connect on digital voltmeter between each test points.
5. Adjust RV104, RV204, RV304 and RV404 so that the digital

voltmeter reading is 5 ± 0.5 mV.

+

_

RV Ref. No.

Test points

RV104

TP11 and TP12

RV204

TP21 and TP22

RV304

TP31 and TP32

RV404

TP41 and TP42