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Cassette Deck Section - Kenwood RXD-251 Service Manual

Mini hifi component system
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CASSETTE DECK SECTION

N O .
ITEM
SETTINGS
Unless otherwise specified : each ; switch should be set as follows :
BEAT SW : OFF
I. Cassette mechanism section (REC/PB head adjustment)
Demagnetization
[1]
and cleaning
MTT-114,
REC/PB head
TCC-153
[2]
azimuth
SCC-1727
10 kHz, -10dB
II. PC board adjustment
MTT-111
TCC-100
< 1 > Tape speed
SCC-1727
3 kHz, -4 dB
TCC-120
< 2 > Playback level
315 Hz 0dB
Put standard
test tape
Recording level
(TCC-120)
into B deck.
< 3 >
Put standard
blank tape
into A deck.
INSTRUMENTS CONNECTION
Oscilloscope
ADJUSTMENT
INPUT
OUTPUT
CASSETTE TAPE
SETTINGS
DECK SETTINGS
demagnetization,
(A)
(A)
(A)
(A)
AC voltmeter
Frequency counter
RXD-251/301/351/371S/A3
ALIGNMENT
PO INT
REC/PB head,
Power OFF,
erase head.
capstan, pinch
cleaning play
roller
Azimuth
PLAY
adjustment
screw
PLAY
SFR201
PLAY
Dubbing and
playback.
ALGN FOR
0dBs = 0.775V
Demagnetize the REC/PB
head by head eraser. Clean
the REC/PB head, erase
head capstan and pinch
roller with a cotton swab
immersed in alcohol.
In a setting wher the output
is maximized, adjust the
azimuth adjustment screw
so that the Lissajous figure
appearing on the oscilloscope
screen comes near to a line
slanted45° Note : The head
should be installed in such a
manner that it approaches the
tape face.
Adjust so that Frequency is
3 kHz at the center of the
tape.
Approx. -5dBm
reference level
Approx. -5dBm
reference level
(A)
PIN2
IC401
MAIN UNIT
F I G
.
13

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