Sony HCD-CP2A - 5 Mechanical Adjustments; 6 Electrical Adjustments; Tape Deck Section

11
0 dB=0.775 VTAPE DECK SECTION
SECTION 6
ELECTRICAL ADJUSTMENTS
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
Record/ Playback Head Azimuth Adjustment
DECK A DECK B
Note: Perform this adjustments for both decks
Procedure:
set
MAIN board
IC306
Pin r; (L-CH)
Pin 3 (R-CH)
MAIN board
IC306
Pin rl
+
–
level meter
test tape
P-4-A100
(10 kHz, –10 dB)
Tape Signal Used for
P-4-A100 10 kHz, –10 dB Azimuth Adjustment
WS-48B 3 kHz, 0 dB Tape Speed Check
P-4-L300 315 Hz, 0 dB Level Adjustment
Mode Torque Meter Meter Reading
3.53 ~ 5.98 mN•m
Forward CQ-102C 36 to 61 g•cm
(0.50 – 0.84 oz•inch)
Forward
0.20 ~ 0.58 mN•m
Back Tension
CQ-102C 2 to 6 g•cm
(0.026 – 0.082 oz•inch)
3.53 ~ 5.98 mN•m
Reverse CQ-102RC 36 to 61 g•cm
(0.50 – 0.84 oz•inch)
Reverse
0.20 ~ 0.58 mN•m
Back Tension
CQ-102RC 2 to 6 g•cm
(0.026 – 0.082 oz•inch)
5.99 ~ 14.02 mN•m
FF, REW CQ-201B 61 to 143 g•cm
(0.85 – 1.98 oz•inch)
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback heads pinch rollers
erase head rubber belts
capstan idlers
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
• Tape Tension Measurement
Mode Tension Meter Meter Reading
Forward CQ-403A
more than 9.8 N
more than 100 g (3.52 oz)
Reverse CQ-403R
more than 9.8 N
more than 100 g (3.52 oz)
SECTION 5
MECHANICAL ADJUSTMENTS