Sony HCD-D170 - Mechanical Adjustments; Electrical Adjustments

SECTION 3
MECHANICAL ADJUSTMENTS
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
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 rated power
supply voltage unless otherwise noted.
Torque Mesurement
FWD ;
FF/REW CQ-201B 55 to 130g cm
[tere [torus meter | _ i oa
SECTION 4
ELECTRICAL ADJUSTMENTS
DECK SECTION | | 0 dB=0.775V
1. Demagnetize the record/playback head with a head
damagnetizer. (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 adjusted.
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
adjustment 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
otherwise specified.
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Record/Playback Head Azimuth Adjustment
Note : Perform this adjustments for both decks.
Procedure :
1. Mode : Playback
paety main board
(10kHz, -10dB) Pin @ (L-CH) level meter
Pin @ (R-CH)
main board
CN307
Pin @ (GND)