Sony XR-4803 사용자 설명서

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SECTION 4

MECHANICAL ADJUSTMENTS

Mode

Tension Meter

Meter Reading

Forward

CQ-403A

more than 90 g

(more than 3.18 oz)

Reverse

CQ-403R

more than 90 g

(more than 3.18 oz)

• Tape Tension Measurement

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

swab:

playback head pinch roller
rubber belt

capstan

idler

2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the

parts adjusted.

5. The adjustments should be performed with the power supply

voltage unless otherwise noted.

• Torque Measurement

Mode

Torque Meter

Meter Reading

Forward

CQ-102C

30 – 65 g•cm

(0.42 – 0.90 oz•inch)

Forward

CQ-102C

0.5 – 4.5 g•cm

Back Tension

(0.01 – 0.06 oz•inch)

Reverse

CQ-102RC

30 – 65 g•cm

(0.42 – 0.90 oz•inch)

Reverse

CQ-102RC

0.5 – 4.5 g•cm

Back Tension

(0.01 – 0.06 oz•inch)

FF, REW

CQ-201B

60 – 200 g•cm

(0.83 – 2.78 oz•inch)

SECTION 5

ELECTRICAL ADJUSTMENTS

TEST MODE

This set have the test mode function. In the test mode, FM Auto
Scan/Stop Level and AM (MW) Auto Scan/Stop Level adjustments
can be performed easier than it in ordinary procedure.

<Set the Test Mode>
1. Set the “power select” switch (S501) is “A” position.
2. Turn ON the regulated power supply. (All LEDs on the set

lights up, and the clock is displayed.)

Note:

Press the

[OFF]

button, if the clock is not displayed.

3. Push the preset

[4]

button.

4. Push the preset

[5]

button.

5. Press the preset

[1]

button for more than two seconds.

6. Then the display indicates all lights, the test mode is set.

<Release the Test mode>
1. Push the

[OFF]

button.

2. Return the “power select” switch (S501) to initially set posi-

tion.

See the adjustment location from on page 16 for the
adjustment.

0 dB=0.775 V

TAPE DECK SECTION

Tape Speed Adjustment

Setting:

Procedure:
1. Put the set into the FWD PB mode.
2. Adjust adjustment resistor for inside capstan motor so that the

reading on the speed checker or frequency counter becomes in
specification.

Specification: Constant speed

Adjustment Location: See page 16.

Speed checker

Frequency counter

–1.5 to +2.5%

2,955 to 3,075 Hz

–

test tape
WS-48A
(3 kHz, 0 dB)

speed checker

frequency counter

set

speaker out terminal