Mechanical Adjustments; Electrical Adjustments - Sony HCD-CP2 Service Manual

SECTION 5

MECHANICAL ADJUSTMENTS

PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback heads
erase head
capstan
2. Demagnetize the record/playback head with a head demagne-
tizer.
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 rated power
supply voltage unless otherwise noted.
• Torque Measurement
• Tape Tension Measurement
• 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
14
pinch rollers
rubber belts
idlers
Meter Reading
36 to 61 g•cm
(0.50 – 0.84 oz•inch)
2 to 6 g•cm
(0.026 – 0.082 oz•inch)
36 to 61 g•cm
(0.50 – 0.84 oz•inch)
2 to 6 g•cm
(0.026 – 0.082 oz•inch)
61 to 143 g•cm
(0.85 – 1.98 oz•inch)
Meter Reading
more than 100 g (3.52 oz)
more than 100 g (3.52 oz)
SECTION 6

ELECTRICAL ADJUSTMENTS

TAPE DECK SECTION
1. Demagnetize the record/playback head with a head demagne-
tizer. (Do not bring the head demagnetizer close to the erase
head)
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to
the parts adjust.
4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
5. The adjustments should be performed in the order given in
this service manual. (As a general rule, playback circuit ad-
justment should be completed before performing recording
circuit adjustment)
6. The adjustments should be performed for both L-CH and R-
ch.
7. Switches and controls should be set as follows unless other-
wise specified.
• Test Tape
Tape Signal
P-4-A100 10 kHz, –10 dB
WS-48B 3 kHz, 0 dB
P-4-L300 315 Hz, 0 dB
Record/ Playback Head Azimuth Adjustment
DECK A DECK B
Note: Perform this adjustments for both decks
Procedure:
test tape
P-4-A100
(10 kHz, –10 dB)
set
0 dB=0.775 V
Used for
Azimuth Adjustment
Tape Speed Adjustment
Level Adjustment
MAIN board
IC401
Pin 8 (L-CH)
level meter
Pin eg (R-CH)
+
–
MAIN board
IC401
Pin rs