Conditions

KS-FX725R

Item

Adjustment and Confirmation methods

S.Values

Adjust

1. Head

Test tape:

Head height adjustment

azimuth

SCC-1659

Adjust the azimuth directly. When you

adjustment

VT703(10kHz)

adjust the height using a mirror tape,

remove the cassette housing from the

mechanism chassis. After installing the

cassette housing, perform the azimuth

A line

adjustment.

1. Load the SCC-1659 mirror tape. Adjust with

height adjustment screw A

and azimuth

Head shield

adjustment screw B so that line A of the

The head is at low position

mirror tape runs in the center between Lch

during.

and Rch in the reverse play mode.

2. After switching from REV to FWD then to

B line

REV, check that the head position set in

procedure 1 is not changed. (If the position

has shifted, adjust again and check.)

3. Adjust with azimuth adjustment screw B so

Head shield

The head is at High position

that line B

of the mirror tape runs in the

during REV.

center between Lch and Rch in the forward

play mode.

Output

Head azimuth adjustment

level:

1. Load VT724

(1kHz) and play

it back in

Maximum

PBHead

the reverse play mode.

Set the Rch output level to max.

FWD Adj B

2. Load VT703 (10kHz) and play it back in

the forward play mode. Adjust the Rch

and Lch output levels to max, with

azimuth adjustment screw B. In this case,

the phase difference should be within 45 .

REV Adj C

HEIGHT Adj A

3.Engage the reverse mode and adjust the output level to max, with azimuth adjustment screw C.

(The phase difference should be 45 or

more.)	phase
(0 )	(45 )

4.When switching between forward and reverse modes, the difference between channels should be within 3dB. (Between FWD L and R, REV L and R.)

5.When VT721 (315Hz) is played back, the level difference between channels should be within 1.5dB.

2. Tape speed	Test tape: VT712	1.	Check to see if the reading of the F, counter /		Tape speed: Built-in volume
and wow	(3kHz)		wow flutter meter is within 3015 3045(FWD		3015	resistor
flutter			/ REV), and less than 0.35% (JIS RMS).		3045Hz
confirmation					Wow
		2.	In case of out of specification, adjust the		flutter: less
			motor with a built-in volume resistor.		than 0.35%

3. Play back	Test tape: VT724	1.	Play test tape VT724, and set the volume		Speaker out
frequency	(1kHz)		position at 2V.		1kHz / 63Hz
response	VT739		Play test tape VT739 and confirm.		: 0	3db
confiramation	(63Hz / 1kHz / 10kHz) 2.		Play test tape VT739 and confirm.		1kHz / 10kHz
			1kHz / 10kHz: -1	3dB,	: -1	3db
			1kHz / 63Hz: 0	3dB,

3.When 10kHz is out of specification, it will be necessary to read adjust the azimuth.

The tuner section is of an adjustment-freedesign. In case the tuner is in trouble, replace the tuner pack.

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