SECTION 5

MECHANICAL ADJUSTMENTS

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

 

 

 

 

 

2.95 – 6.37 mN•m

Forward

CQ-102C

(30 – 65 g•cm)

 

 

(0.42 – 0.90 oz•inch)

Forward

 

0.05 – 0.44 mN•m

CQ-102C

(0.5 – 4.5g•cm)

Back Tension

 

(0.01 – 0.06 oz•inch)

 

 

 

 

2.95 – 6.37 mN•m

Reverse

CQ-102RC

(30 – 65 g•cm)

 

 

(0.42 – 0.90 oz•inch)

Reverse

 

0.05 – 0.44 mN•m

CQ-102RC

(0.5 – 4.5g•cm)

Back Tension

 

(0.01 – 0.06 oz•inch)

 

 

 

 

 

 

 

5.89 – 19.61 mN•m

FF, REW

CQ-201B

(60 – 200 g•cm)

 

 

(0.83 – 2.78 oz•inch)

 

 

 

• Tape Tension Measurement

Mode

Tension Meter

Meter Reading

 

 

more than 8.83 mN•m

Forward

CQ-403A

(more than 90 g)

 

 

(more than 3.18 oz)

 

 

 

 

 

more than 8.83 mN•m

Reverse

CQ-403R

(more than 90 g)

 

 

(more than 3.18 oz)

 

 

 

SECTION 6

ELECTRICAL ADJUSTMENTS

TEST MODE

This set has the test mode function.

<Set the Test Mode>

1.Turn ON the regulated power supply. (The clock is displayed)

Note: Press the [OFF] button, if the clock is not displayed.

2.Press the preset [4] button.

3.Press the preset [5] button.

4.Press the preset [1] button for more than two seconds.

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

<Release the Test mode>

1. Press the [OFF] button.

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Sony Ericsson XR-C7500RX service manual Section Mechanical Adjustments, Section Electrical Adjustments, Torque Measurement