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Mechanical Adjustments; Electrical Adjustments; Test Mode - Sony XR-C7500R Service Manual

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MECHANICAL ADJUSTMENTS

3 7 63 1515 0
1. Clean the following parts with a denatured-alcohol-moistened
swab:
playback head
rubber belt
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
Forward
Forward
Back Tension
Reverse
Reverse
Back Tension
FF, REW
• Tape Tension Measurement
TE
L 13942296513
Mode
Forward
Reverse
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SECTION 5
pinch roller
capstan
Torque Meter
Meter Reading
2.95 – 6.37 mN•m
CQ-102C
(30 – 65 g•cm)
(0.42 – 0.90 oz•inch)
0.05 – 0.44 mN•m
CQ-102C
(0.5 – 4.5g•cm)
(0.01 – 0.06 oz•inch)
2.95 – 6.37 mN•m
CQ-102RC
(30 – 65 g•cm)
(0.42 – 0.90 oz•inch)
0.05 – 0.44 mN•m
CQ-102RC
(0.5 – 4.5g•cm)
(0.01 – 0.06 oz•inch)
5.89 – 19.61 mN•m
CQ-201B
(60 – 200 g•cm)
(0.83 – 2.78 oz•inch)
Tension Meter
Meter Reading
more than 8.83 mN•m
CQ-403A
(more than 90 g)
(more than 3.18 oz)
more than 8.83 mN•m
CQ-403R
(more than 90 g)
(more than 3.18 oz)
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ELECTRICAL ADJUSTMENTS

2 9
8

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
2. Press the preset
3. Press the preset
4. Press the preset
5. Then the display indicates all lights, the test mode is set.
<Release the Test mode>
[OFF]
1. Press the
Q Q
3
6 7
1 3
1 5
co
.
SECTION 6
9 4
2 8
[OFF]
button, if the clock is not displayed.
[4]
button.
[5]
button.
[1]
button for more than two seconds.
button.
0 5
8
2 9
9 4
2 8
m
9 9
9 9
15

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