Pioneer CT-660 Instrukcja serwisowa - Strona 21

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10. ADJUSTMENTS

10.1

MECHANICAL

ADJUSTMENTS

Prior to Adjustment

Clean the both

reel base, the capstan and the

pinch roller with an alcohol moistened swab.

Pinch Roller Pressure Adjustment

1. Put the tape deck into the playback mode.

2. Gently push against the pinch roller arm with

the tension gauge and separate the pinch roller

slightly from the capstan.

3. Then

the pinch roller back onto the capstan,

and read the value when the pinch roller starts

to rotate.

If the

reading

faiis to lie within

300 ~ 500g, replace the pinch pressure spring.

Tension gauge

Pinch roller

Fig. 10-1

Pinch roller pressure adjustment

Reel Base Torque Adjustment

Measure

the

torque

with

the

torque

meter

during

playback,

fast forward

(FF) and rewind

(REW) modes. The measured values should normal-

ly lie within

the

allowably

ranges

listed in the

table 1.

If the measured values lie outside the relevant

ranges, replace the TU (take-up) reel base assembly

and/or

supply

reel

base

assembly,

idler, or

drive arm full assembly.

Table 1

TU reel base

Playback mode

" — 57g.cm

Supply reel base

FF mode

75 — 135g.cm

1.5 — 5g.cm

* 1.5 — 5g.cm

75 — 135g.cm

*Denotes back tension torque.

CT-660,CT-S!!1

Tape Speed Adjustment

1. Connect

the frequency

counter to the DOL.L

terminal on the deck assembly.

2. Playback

the

38kHz

portion

of the

STD-301

test

tape.

the

beginning,

the

frequency

should

lie

within

the

3000Hz~3010Hz

range,

and

may

adjusted

by turning

the

semi-fixed resistor located in the capstan motor

adjustment hole as shown in Fig. 10-2.

Decrease

Increase

Fig. 10-2

Tape speed adjustment

REC Joint Check and Adjustment

Move

the REC joint mechanism

catching posi-

tion if the slide switch is not fully switched when

the tape transport unit is in recording mode.

Fig. 10-3

REC joint check and adjustment