Sony CFD-50 - Mechanical Adjustments; Torque Measurement; Tape Tension Measurement; Electrical Adjustments

CFD-50
SECTION 4
MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened swab:
record/playback head pinch roller
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head demagentizer.
(Do not bring the head demagnetizer close to the erase head.)
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.
6. Power supply voltge: 9V dc.
Torque Measurement
22.5 — 55 gecm
Fast Forward and 60 — 120 g*cm
(0.83 1.67 ozrinchy | COMI
: 2 — Sgecm
(0.03 = 0.07 ozrinchy | | SO
Tape Tension Measurement
CQ-403A more than 150 g (5.29 02)
SECTION 5
ELECTRICAL ADJUSTMENTS
PRECAUTION
Adjustments should be performed in the order given.
Generally playback circuit adjustments should be completed before
performing recording circuit adjustments.
Adjustments should be performed for both L-ch and R-ch.
Switches and controls should be set as follows unless otherwise
specified.
Positions of switches and control knobs
TONE BO OOO ROHS ie: CLO OO 6 06 0168. O08 6.656 SOE 8) OS 8 ON Oe 0180 O88 are) maximum
Standard recording position
Adjust the VOLUME knob so that the following regulated
input/output signal levels are obtained.
Standard input level
[—__tput ind
Standard output level
[Output Pin [Speaker A)] PHONES
Output
signal
level
“0
cB
)
Wee
ie
0
dB=0.775
V