Table of Contents
Advertisement
CFD-20/30
SECTION
4
SECTION
5
MECHANICAL
ADJUSTMENT
ELECTRICAL
ADJUSTMENT
PRECAUTION
5-1.
TAPE
RECORDER
SECTION
1.
Clean
the following
parts with
a denatured-alcohol-
Note:
The
adjustment
should
be performed
in the
moistened swab:
order given in the service manual. As a rule,
record/playback head
pinch roller
adjustment
about
playback
should
be
per-
erase head
rubber belts
formed before adjustment about recording.
capstan
idlers
The adjustments should be performed for both
2.
Demagnetize the record/playback head with a head
L-CH and R-CH.
demagnetizer. (Do not bring the head demagnetizer close
Standard Output Level
to the erase head.)
3.
Do not use a magnetized screwdriver for the adjustments.
4.
After the adjustments, apply suitable locking compound
Output terminal
load impedance
3
output signal level
0.25V (—10dB)
to the parts adjusted.
maa
'
j
0dB =0.775V
5.
The
adjustments
should be perfomed
with the rated
[0aB =0.775V |
power supply voltage unless otherwise noted.
Test Tape
6.
Power supply voltage: 9V dc.
aoa
aoa
needa:
WS-48A
3kHz, 0dB
tape speed adjustment
Torque
Measurement
P-4-A063
6.3kHz, —10dB
azimuth adjustment
Torque
Torque meter
Meter reading
|
5
.
ss Nee
come
é 30-756 ° om
Tape Speed Adjustment
ue
———
Procedure :
Forward
1.5—6g * cm
:
speed checker
back consid
€Q-102C
(0.020--0.083 oz * inch)
Mode: playback
LFM-30
30—75g
*
; or
€Q-102RC
tire
bog ine
ae frequency
counter
R
1.5—6g * cm
back tenciod
€Q-102RC
(0.020--0.083 oz + inch)
(3kHz,0¢B)
60—130g + cm
Fast
CQ-2018
(0.83—1.80 oz * inch)
Forward
eos
60—130g-cm
Rewind
CQ-201B
(0.83—1.80 oz « inch)
See e e :
\
| 3
PHONES jack
Adjustment Value:
Tape Tension Measurement
(CFD-20
P
2
(
)
Speed checker
Digital frequency counter
Mode
Meter
|
Meter reading
|
"15%
to +15%
2,955 to 3,045Hz
(more than 5.28 02)
Adjustment Location:
Mechanism Deck block
—CFD-20—
—CFD-30—
Tape Tension Measurement (CFD-30)
Mode
Meter
|
Meter reading
Forward
CQ-403A
|
more than 90g
tape speed
=
| 0 a
adjustment
Advertisement
Table of Contents
