Mechanical Adjustments; Electrical Adjustments; Test Mode - Sony XR-C550RDS Service Manual

SECTION 4
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MECHANICAL ADJUSTMENTS

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1. Clean the following parts with a denatured-alcohol-moistened
swab:
playback head pinch roller
rubber belt capstan
idlers
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
Forward CQ-102C
Forward
CQ-102C
Back Tension
Reverse CQ-102RC
Reverse
CA-102RC
Back Tension
FF, REW CQ-201B
• Tape Tension Measurement
Mode Tension Meter
TE
L 13942296513
Forward CQ-403A
Reverse CQ-403R
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Meter Reading
30 – 65 g•cm
(0.42 – 0.90 oz•inch)
0.5 – 4.5 g•cm
(0.01 – 0.06 oz•inch)
30 – 65 g•cm
(0.42 – 0.90 oz•inch)
0.5 – 4.5 g•cm
(0.01 – 0.06 oz•inch)
60 – 200 g•cm
(0.83 – 2.78 oz•inch)
Meter Reading
more than 90 g
(more than 3.18 oz)
more than 90 g
(more than 3.18 oz)
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SECTION 5

ELECTRICAL ADJUSTMENTS

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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 (S801) 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. Set the power select switch (S801) is "B" position.
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