Sony CFD-460 - Mechanical Adjustments; Electrical Adjustments; Tape Recorder Section

CFD-460 |
SECTION 3
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
demagnetizer. (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 perfomed with the rated
power supply voltage unless otherwise noted.
6. Power supply voltage: 12V dc.
Torque Measurement
(0.28—0.83 oz+inch)
Forward
back
tension
CQ-102C
2—6g*cm
(0.028 - 0.083 oz*inch)
20—60g*cm
CQ-102RC
(0.28—0.83
oz*inch)
Reverse
2—6g°cm
back tension CQ-102RC (0.028—0.083 oz*inch)
Fast more than 45g-cm
Forward CQ-201B (more than 0.62 oz*inch)
(more than 0.62 oz*inch)
Tape Tension Measurement
Cave
Reverse
more than 70g
(more than 2.47 oz)
SECTION 4
ELECTRICAL ADJUSTMENTS
4-1. TAPE RECORDER SECTION
Standard Input Level
MIC IN
Source impedance 300 2
Sabi nv (Bt
Standard Output Level
Output terminal SP OUT PHONES OUT
load impedance 3.20,
orisv (ds) | 025 (1088)
Test Tape
a
Tape Speed Adjustment
Procedure :
e Perform high speed adjustment before normal speed adjust-
ment.
Mode: playback
test tape
paiva
con
frequencny
counter
320
oc a E
Phones jack
ese $402 Adjustment Frequcency
P (CNP312) point counter
RV304
High ON
Pe [eatin |
RV303
Normal OFF
8 [contin
Frequency difference between the begining and the end of the
tape should be within +0.35%.
5,980 — 6,020Hz
2,990 —3,010Hz
Adjustment Location :
(Front Side) —bottom view—
test pin (CNP312)
high speed : short
normal speed : open