Mechanical Adjustments; Electrical Adjustments; Torque Measurement; Record/Playback Head Azimuth Adjustment - Sony HCD-RX80 Service Manual

SECTION 4

MECHANICAL ADJUSTMENTS

PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head
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 sup-
ply 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
pinch roller
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 (3.53 oz)
more than 100 g (3.53 oz)
– 30 –
SECTION 5

ELECTRICAL ADJUSTMENTS

DECK SECTION

0 dB=0.775 V
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 sup-
ply voltage unless otherwise noted.
5. The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit ad-
justment.)
6. The adjustments should be performed for both L-CH and R-ch.
7. Switches and controls should be set as follows unless otherwise
specified.
8. Set to test mode. (Press key switch same time
SPECTRUM ANALYZER
EFFECT ON/OFF button.)
• 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:
1. Mode: Playback (FWD)
test tape
P-4-A100
(10 kHz, –10 dB)
set
ENTER/NEXT and
Used for
Azimuth Adjustment
Tape Speed Adjustment
Level Adjustment
main board
CN207
Pin 1 (L-CH)
Pin 3 (R-CH) level meter
+
–
main board
CN207
Pin 2