CFM-D1JMK2/D1MK2
8
SECTION 3
ADJUSTMENTS
3-1. MECHANICAL ADJUSTMENTS
AND MEASUREMENTS
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 performed with the rated
power supply voltage unless otherwise noted.
Torque Measurement
3-2. ELECTRICAL ADJUSTMENTS
CASSETE SECTION
Note : The adjustment should be performed in the order given in
this service manual.
r
Switches and controls should be set as follows unless
otherwise specified.
FUNCTION : TAPE (RADIO OFF)
VOLUME :
max
TONE :
mechanical mid.
Torque Torque Meter Meter Reading
2.95 – 6.86mN
•
m
Playback CQ-102C (30-70g
• cm)
(0.417-0.97oz• inch)
8.83 – 14.7mN
•
m
Rewind CQ-201B (90-150g
• cm)
(1.24-2.08oz• inch)
8.83 – 14.7mN
•
m
Fast Forward CQ-201B (90-150g
• cm)
(1.24-2.08oz• inch)
0.148 – 0.539mN
•
m
Back Tention CQ-102C (1.5-5.5g
• cm)
(0.02-0.76oz• inch)
Tape Tension Measurement
Torque Meter Meter Reading
CQ-403A more than 170g (5.99 oz)
Standard Output Level
SP OUT EARPHONE
load impedance 4Ω 32Ω
output level 0.775V (0dB) 0.25V (–10dB)
Type Signal Used for
WS-48A 3kHz, 0dB Tape Speed Adjustment
P-4-A063 6.3kHz, – 10dB Azimuth Adjustment
Test Tape
0 dB=0.775V
Tape Speed Adjustment
Procedure :
Mode : playback
digital frequency
counter
32
Ω
test tape
WS-48A
(3kHz, 0dB)
Earphone jack
set
+
-
Digital frequency counter
2,940 – 3,090 Hz
Frequency difference between the beginning and the end of
the tape should be within 1.5% (45Hz).
Adjustment Value :
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