– 8 –
TUNER SECTION
AM Section
Function switch : AM
Volume : MIN
FM Section
Function switch : FM
Volume : MIN
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
FM RF signal
generator
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
telescopi
antenna
terminal
0.01
µ
F
set
32
Ω
J301 (phones)
level mete
SECTION 5
ADJUSTMENTS
5-2. ELECTRICAL ADJUSTMENTS
TAPE RECORDER SECTION
Standard Output Level
Output terminal HP OUT
load impedance 32 Ω
output signal level 0.25V (–10dB)
Test Tape
Type Signal Used for
WS-48A 3kHz, 0dB Tape Speed Adjustment
0dB = 0.775V
Tape Speed Adjustment
Procedure :
Mode : Playback
set
test tape
WS-48A
(3kHz, 0dB)
32
Ω
speed checker
LFM-30 or
digital frequenc
counter
J301 (phones)
Tape speed adjustment
control inside motor
5-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head pinch roller
erase head rubber belts
capstan
2. Demagnetize the record/playback head with a head demagne-
tizer. (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 sup-
ply voltage unless otherwise noted.
Torque Measurement
Torque Torque Meter Meter Reading
Forward CQ-102C
30 – 70 g•cm
(0.42 – 0.97 oz•inch)
Forward
CQ-102C
1.5 – 5.5 g•cm
Back Tension (0.020 – 0.076 oz•inch)
Fast Forward CQ-201B
more than 60 g•cm
(more than 0.84 oz•inch)
Rewind CQ-201B
more than 60 g•cm
(more than 0.84 oz•inch)
Tape Tension Measurement
Torque Meter Meter Reading
CQ-403A
more than 100g
(more than 3.53 oz)
Adjustment Value :
Speed checker Digital frequency counter
–1 to +1% 2,970 – 3,030Hz
Frequency difference between the beginning and the end of the tape
should be within 1.5% (45Hz).
Adjustment Location :
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