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3-2. ELECTRICAL ADJUSTMENTS
Capstan motor Speed Adjustment
Note: The adjustment should be performed in
the order given in this service manual.
The adjustments should be performed
for both
L-CH and R-CH.
Set the BIAS and EQ switches according to the
tape as follows.
gj
cs-30 I
Fe-Cr
(METAL)
III:
Fe-Cr
cs-40
AUTO
Fe-Cr
(METAL)
IV:
METAL
Switches and controls should be set as follows
unless otherwise specified.
DOLBY NR switch:
OFF
TAPE switch:
AUTO (I: NORM)
l Standard Record:
Deliver the standard input signal level to the
input jack and set the REC LEVEL control to
obtain the standard output signal level.
Standard Input Level
MIC
LINE IN
source impedance
300 ohm
1Ok
input level
0.77
mV
(-60
dB)
0.25 V (-10
dB)
Standard Output Level
1
\
1
HEADPHONES
1
LINE OUT
1
1
load impedance
1
8n
I
47k
1
1
output level
1
31
mV
(-26
dB)
1
0.435 V (-5
dB)
I
-1
5-
Procedure:
Mode: playback
speed checker
L FM-30
digital
?Ferkquencv
test tape
WS-48A
(3
kHz,
0 dB)
counter
set
LINE
OUT
Specification:
1
Speed checker IDigital frequency counter
I
I
-0.8~+0.8%
I
2975
~
3025 Hz
I
Frequency difference between the beginning
and the end of the tape should be within 0.84%
(25 Hz).
Adjustment Location:
motor
Adjust the speed
by using screwdriver. When
turning the screw clockwise, speed is faster.