CFM-20L
SECTION 3
ADJUSTMENTS
3-1. MECHANICAL ADJUSTMENTS3-2. ELECTRICAL ADJUSTMENTS
PRECAUTION TAPE RECORDER SECTION 0dB=0.775V
1.Clean the following parts with a denatured-alcohol-moistened
swab :FUNOTION switch (S101) : TAPE (RADIO OFF)
record/playback headpinch rollerVOLUME (RV101): MIN
erase headrubber belts
Standard Output Levelcapstan
Output terminalEarphone jack (J101)
2.Demagnetize the record/playback head with a head demagnetizer.
load impedance8&
(Do not bring the head demagnetizer close to the erase head.)
output signal level0.25V (�10dB)3.Do not use a magnetized screwdriver for the adjustments.
4.After the adjustments, apply suitable locking compound to the
parts adjusted.Test Tape
TypeSignalUsed for5. The adjustments should be performed with the rated power
WS-48A3kHz, 0dBTape Speed Adjustmentsupply voltage unless otherwise noted.
Record/Playback Head
P-4-A0636.3kHz
Torque MeasurementAzimuth Adjustment
TorqueTorque MeterMeter Reading
1.77 to 5.88 mNYm
ForwardCQ-102AS(18 to 60 gYcm)
Record/Playback Head Azimuth Adjustment
(0.25 to 0.83 ozYinch)
Procedure :
Forward0.01 to 0.49 mNYm1.Playback Mode
CQ-102AS(1 to 5 gYcm)
Back Tension
(0.014 to 0.069 ozYinch)test tape
P-4-A063Jlevel meter
4.42 to 9.31 mNYm
(6.3kHz, -10dB)
Fast ForwardCQ-201WS8&
(45 to 95 gYcm)
(0.63 to 1.31 ozYinch)
+
4.42 to 9.31 mNYmset
RewindCQ-201WS(45 to 95 gYcm)
(0.63 to 1.31 ozYinch
)
J101 (Earphone jack)
Tape Tension Measurement
Torque MeterMeter Reading
2.Rotate the screw to adjust level meter reading to the maximum.
more than 60g
CQ-405ASNote : Adjust to the maximum peak though there may be two or
(more than 2.12 oz)
three peakes
3.After the adjustment, lock the adjustment screws with suitable
locking compound.
Adjustment Location :
Head azimuth adjustment screw
6 |
ACEC
