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Cassette deck adjustment
NO.
ITEM
Unless otherwise specified, set the respective switches as follows:
TAPE : NORMAL
I Cassette mechanism unit (Adjustment of the REC / PLAY head)
Demagnetization
(1)
and cleaning
Azimuth of the
(2)
REC / PLAY
head
II PC board adjustment.
Adjust the AG for the
BIAS
output of the DECK to
(1)
CURRENT
become -20dBs
at 12.5kHz/400Hz.
X29 CN103
TEST PIN
1
L-PLAY
2
L-REC
3
GND
4
R-REC
5
R-PLAY
6
GND
7
ERASE
AC voltmeter
Oscilloscope
(B)
ADJUSTMENT
INPUT
OUTPUT
SETTING
SETTING
SCC-1727
TCC-153
(B)
MTT-114
10kHz, -10dB
(A)
(B)
(AC-224)
Frequency counter
CASSETTE TAPE
ALIGNMENT
DECK SETTING
POINTS
Recording
Power : OFF
head, erase
Demagnetization,
head, capstan
cleaning, PLAY
pinch roller
PLAY
RVS
FWD
VR101(L)
REC PLAY
VR102(R)
L
A U X
R E C
O U T
R
VIDEO
OUT
L
A U X
I N
R
O P T I C A L
O U T
AC voltmeter
(A)
RXD-M32V
ALIGN FOR
0dBs = 0.775V
Demagnetize the REC / PLAY head
with the head eraser. Clean the REC/
PLAY head, erase head, capstan and
pinch roller using a cotton swab slightly
damped with alcohol.
Adjust the output to maximum and
adjust the azimuth adjustment screw
for the Lissajours waveform pattern of
the oscilloscope to become close to a
45ß straight ling.
Record 400Hz and 12.5kHz alternately,
and adjust the bias current adjustment
potentiometer for the playback levels to
become the same.
ANTENNA
AM
GND
FM
75
SPEAKERS(6–16 )
R
A C
1 1 0 -
1 2 0 V ~
AG
A C
2 2 0 -
2 4 0 V ~
FIG.
+
-
L
9
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