Sony XR-C440 service manual Section Mechanical Adjustments, Section Electrical Adjustments

SECTION 4

MECHANICAL ADJUSTMENTS

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

playback head	pinch roller
rubber belt	capstan
idles

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	Torqu Meter	Meter Reading
Forward	CQ-102C	30 - 65 g·cm
		(0.42 - 0.90 oz·inch)
Forward	CQ-102C	0.5 - 4.5g·cm
Back Tension		(0.01 - 0.06 oz·inch)
Reverse	CQ-102RC	30 - 65 g·cm
		(0.42 - 0.90 oz·inch)
Reverse	CA-102RC	0.5 - 4.5g·cm
Back Tension		(0.01 - 0.06 oz·inch)
FF, REW	CQ-201B	60 - 200 g·cm
		(0.83 - 2.78 oz·inch)
• Tape Tension Measurement
Mode	Torqu 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)

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 “OFF” mode.

2.Push the preset 4 button.

3.Push 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. Push the “OFF” button.

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