Mechanical Adjustments; Electrical Adjustments; Test Mode - Sony XR-C7500RX Service Manual

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
Forward CQ-102C
Forward
CQ-102C
Back Tension
Reverse CQ-102RC
Reverse
CQ-102RC
Back Tension
FF, REW CQ-201B
• Tape Tension Measurement
Mode Tension Meter
Forward CQ-403A
Reverse CQ-403R
Meter Reading
2.95 – 6.37 mN•m
(30 – 65 g•cm)
(0.42 – 0.90 oz•inch)
0.05 – 0.44 mN•m
(0.5 – 4.5g•cm)
(0.01 – 0.06 oz•inch)
2.95 – 6.37 mN•m
(30 – 65 g•cm)
(0.42 – 0.90 oz•inch)
0.05 – 0.44 mN•m
(0.5 – 4.5g•cm)
(0.01 – 0.06 oz•inch)
5.89 – 19.61 mN•m
(60 – 200 g•cm)
(0.83 – 2.78 oz•inch)
Meter Reading
more than 8.83 mN•m
(more than 90 g)
(more than 3.18 oz)
more than 8.83 mN•m
(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)
[OFF]
Note: Press the
button, if the clock is not displayed.
[4]
2. Press the preset button.
[5]
3. Press the preset button.
[1]
4. Press the preset button for more than two seconds.
5. Then the display indicates all lights, the test mode is set.
<Release the Test mode>
[OFF]
1. Press the button.
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