Sony WM-AF22 - Section 2: Mechanical and Electrical Adjustments; Mechanical Adjustments and Precautions; Electrical Adjustments: Cassette Section

WM-AF22/AF28/BF22/BF28 |
SECTION 2
—. MECHANICAL AND ELECTRICAL ADJUSTMENTS
MECHANICAL ADJUSTMENTS
PRECAUTION
1, Clean the following parts with a denatured—alcohol—
moistened swab :
playback head
capstan idlers
rubber belts 3
2. Demagnetize the playback head with a head demagne—
pinch roller
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
(0.31—0,.6302 + inch)
| , 1—2.5g > cm
Tape Tension Measurement
c
CQ-403A more than 90g (1.260z)
Fast Forwand 55— 150g - cm
ELECTRICAL ADJUSTMENTS
CASSETTE SECTION
Playback Head Phase Check
Note :When replacing the head, check the both L-ch and R-ch
phases, | 7
Procedure :
Phase Check
Mode : playback
test tape :
P-4-A063 L-CH
(6.3kHz, —10dB) 180 oscilloscope
fn i
headphones jack
(earphones)