Cassette Deck Adjustment; Measurement Equipment Connections - Kenwood RXD-303 Service Manual

Cassette Deck adjustment

NO. ITEM INPUT SETTING
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
TAPE SPEED
(1)
(NORMAL)
III PC board adjustment.
PLAYBACK MTT-256, SCC-1727
(1)
LEVEL
MTT-256U, TCC-120
Adjust the AG for the
(2) BIAS CURRENT output of the DECK to
become 12.5KHz —20dBs.
400Hz/12.5kHz (AC-224)

Measurement Equipment Connections

+
-
R L
FRONT
SPEAKERS
(6-16 )
ON
SURROUND
OFF
L
R
- +
SURROUND
SPEAKERS
(8-16 )
AG
AC voltmeter
ADJUSTMENT
OUTPUT CASSETTE TAPE
SETTING
Demagnetization,
SCC-1727
TCC-153
(B)
MTT-114
10kHz, -10dB
TCC-110
MTT-111
(B)
SCC-1727
3kHZ
MTT-150
400Hz
(B)
315Hz
315 Hz
(A)
(B)
X13, CN1
31
L-PLAY
30
29
R-PLAY
28
GND
(A)
RXD-303/353/503/553/653/A33/A53
ALIGNMENT
DECK SETTING POINTS
Recording
Power : OFF
head, erase
head, capstan
cleaning, PLAY
pinch roller
PLAY
RVS FWD
PLAY VR5
VR 3 (L)
PLAY
VR 4 (R)
VR 1 (L)
REC PLAY
VR 2 (R)
ANTENNA
AM
GND
FM
75
L
R
DVD/VIDEO INPUT
AC voltmeter
Oscilloscope
AC 110-
120V~
AC 220-
240V~
(B)
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 line.
Adjust the tape speed so that 3kHz is
obtained at the center of the tape.
Adjust the playback output to —2.5dBs.
Adjust the playback output to —5.5dBs.
Adjust the playback output to —1.5dBs.
Record 400Hz and 12.5kHz alternately,
and adjust the bias current adjustment
potentiometer for the playback levels to
become the same.
Frequency counter
FIG.
11