Cassette Deck Adjustment - Kenwood RXD-M32 Service Manual

RXD-M32

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
X29 CN3
TEST PIN
1 L-PLAY
2 L-REC
3 GND
4 R-REC
5 R-PLAY
6 GND
7 ERASE
AC voltmeter
Oscilloscope
(B)
16
ADJUSTMENT
INPUT OUTPUT
SETTING SETTING
SCC-1727
TCC-153
(B)
MTT-114
10kHz, -10dB
(A)
(B)
become -20dBs
at 12.5kHz/400Hz.
(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
I N
R
AC voltmeter
(A)
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
75Ω
AG
FIG.
SPEAKERS(6–16Ω)
+
-
R L