Sony TC-W311 Service-Handbuch - Seite 7

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SECTION

ADJUSTMENTS

1-1.

MECHANICAL

ADJUSTMENTS

PRECAUTION

1. Clean the following parts with a denatured-alcohol-moistened

swab:

record/playback head

pinch roller

erase head

rubber betls

capstan

idlers

Torque Measurement (DECKS A and B)

Gas aoe

seis

1-2,

ELECTRICAL

ADJUSTMENTS

1. Demagnetize

the record/playback

and erase head with a head

demagnetizer.

2. Do not use a magnetized screwdriver for the adjustments.

3. After the adjustments, apply suitable locking compound to the

parts adjusted.

4. The

adjustments

should be performed with the rated power

supply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in this

service manual.

(Asa general rule, playback circuit adjustment

should be completed before performing recording circuit adjust-

ment.)

6. The adjustments should be performed for both L-CH and R-CH.

@ Switches and controls should be set as follows unless otherwise

specified.

DOLBY

NR switch: OFF

TAPE

SELECT

switch:

TYPE I (NORMAL)

Standard Record:

Deliver

the standard

input signal level to the input jack

and set the REC

LEVEL

control to obtain

the standard

output signal level.

—

Record

Mode

—

af osc

LINE OUT

LINE IN

Note:

Before recording short CN505

with a lead wire, otherwise

MUTING

functions and output signal does not appear at

LINE OUT terminals.

Standard Input Level

G35V 1008

Standard Output Level

load impedance

47kQ

Record/Playback Head Azimuth Adjustment

2-CH

Procedure:

1. Mode:

FWD playback

test tape

P-4-A100

(10 kHz, -10 dB) '

LINE OUT

2. Turn the adjustment screw and check output peaks. If the peaks

do not match for L-CH and R-CH, turn the adjustment screw so.

that outputs match within 1 dB of peak.

within 1d8 :

Output level

" within 1 dB

—

screw position

Screen pattern

—

in phase

45°

90°

135°

180°

good

wrong

3. After the adjustment, apply suitable locking compound to the

adjustment screw.

Adjustment Location:

SATURN

REALS

Adjustment

screw

Test Tape:

Level Adjustment

[LINE IN/OUT for TC- W301 ] : CN321

@)L-ch LINE OUT

Tape Speed Adjustment

@A-ch LINE OUT