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TUNER SECTION
AM Section
Function switch : AM
Volume
Volume
: MIN
FM Section
Function switch : FM
Volume
Volume
: MIN
AM RF signal
generator
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
FM RF signal
generator
generator
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
400Hz signal.
Output level : as low as possible
telescopic
antenna
terminal
antenna
terminal
0.01
µ
F
set
32
Ω
J301 (phones)
level meter
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
Tape Speed Adjustment
Procedure :
Mode : Playback
Adjustment Value : 3,000Hz
Standard Value : 2,970 - 3,030Hz
Standard Value : 2,970 - 3,030Hz
Frequency difference between the beginning and the end of the tape
should be within 1.5% (45Hz).
should be within 1.5% (45Hz).
set
test tape
WS-48A
(3kHz, 0dB)
WS-48A
(3kHz, 0dB)
32
Ω
digital frequency
counter
counter
J301 (phones)
Tape speed adjustment
control inside motor
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.)
Do not use a magnetized screwdriver for the adjustments.
head.)
Do not use a magnetized screwdriver for the adjustments.
3. The adjustments should be performed with the rated power sup-
ply voltage (9V) unless otherwise noted.
Torque Measurement
Torque
Torque Meter
Meter Reading
Forward
CQ-102C
18 – 60 g•cm
(0.25 – 0.83 oz•inch)
Forward
CQ-102C
1.0 – 5.0 g•cm
Back Tension
(0.014 – 0.069 oz•inch)
Fast Forward
CQ-201B
45 – 95 g•cm
(0.62 – 1.32 oz•inch)
Rewind
CQ-201B
45 – 95 g•cm
(0.62 – 1.32 oz•inch)
Tape Tension Measurement
Torque Meter
Meter Reading
CQ-403A
more than 60g
(more than 2.12 oz)
0dB = 0.775V
Adjustment Location : Mechanism deck
0dB = 1
µ
V
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