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3-2.
ELECTRICAL
ADJUSTMENTS
Note: The adjustment should be performed
the order given in this service manual.
The adjustments
L-CH and R-CH.
for both
Set the BIAS and EQ switches according to the
tape as follows.
(METAL)
cs-30 I
Fe-Cr
AUTO
cs-40
Fe-Cr (METAL)
Switches and controls should be set as follows
unless otherwise specified.
DOLBY NR switch:
TAPE switch:
Standard Record:
l
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
source impedance
input level
0.77 mV (-60 dB) 0.25 V (-10 dB)
Standard Output Level
H E A D P H O N E S
load
impedance
output level
31
in
should be performed
III:
Fe-Cr
IV: METAL
OFF
AUTO (I: NORM)
MIC
LINE IN
300 ohm
1 O k
L I N E
O U T 1
4 7 k
mV (-26
dB) 1 0.435 V (-5 dB) I
Capstan motor Speed Adjustment
Procedure:
Mode: playback
test tape
WS-48A
(3 kHz, 0 dB)
Specification:
Speed
I
-0.8~+0.8%
Frequency difference between the beginning
and the end of the tape should be within 0.84%
(25 Hz).
Adjustment Location:
Adjust the speed by using screwdriver. When
turning the screw clockwise, speed is faster.
5-
- 1
set
LINE OUT
I
checker
Digital frequency counter
I
2975 ~ 3025 Hz
motor
speed checker
L FM-30
digital
counter
I
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