Section Electrical Adjustments, Test Tape

SECTION 5 ELECTRICAL ADJUSTMENTS

Setting:

•Supplied voltage: 2.5 V

•Switch and control position

[VOL w] control (RV101) : mechanical center

Tape Speed Adjustment

Mode: playback

test tape

[PAUSE .] switch (S105) : OFF

WS-48A

frequency counter

[SPEED CONTROL](RV602): center click
[VOR] switch (S104)		: OFF
Test Tape

Type	Signal		Used for

P-4-A063	6.3 kHz, –10 dB		Head Azimuth Adjustment
WS-48A	3 kHz, 0 dB		Tape Speed Adjustment

0 dB=0.775 V

Record/Playback Head Azimuth Adjustment

Mode: playback

test tape

P-4-A063level meter (6.3 kHz, –10 dB)

10 k Ω

set

–

EAR jack (J102)

Procedure:

1.Turn the adjustment screw to obtain the maximum reading on level meter.

Note: Several peaks may appear, but take the maximum.

2.After the adjustment, lock the adjustment screw with suitable locking compound.

Adjustment Location:

adjustment screw

Press the N button.

(3 kHz, 0 dB)

10 k Ω

	set	+
	set	–
		–
		EAR jack (J102)

Procedure:

– Normal Speed –

1.Set [REC TIME] switch (S601) to NORMAL (4.8 cm/s) posi- tion, and playback the tape (WS-48A) .

2.Adjust RV601 so that frequency counter reading becomes 3,040 Hz.

Specification values: 3,030 to 3,050 Hz

– Double Speed –

3.Set [REC TIME] switch (S601) to DOUBLE (2.4 cm/s) posi- tion.

4.Playback the tape from the beginning for two minutes, then adjust RV603 so that frequency counter reading becomes 1,540 Hz.

Specification values: 1,535 to 1,545 Hz

Confirm that deflection of the frequency counter reading between the beginning and the end of tape is within 1% (NORMAL: approx. 30.4 Hz, DOUBLE: approx. 15.4 Hz) .

Adjustment Location:

– MAIN BOARD (Conductor Side) –

J102 J101

RV601

Tape Speed Adjustment

(Normal Speed)

RV603

Tape Speed Adjustment

(Double Speed)

– 8 –

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