Adjustment - Kenwood RXD-NV301 Service Manual

RXD-NV301/NV301E/NV701/NV701E
QQ
3 7 63 1515 0
NO. ITEM
Unless otherwise specified, set the respective swiches 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
TAPE SPEED
(1)
(NORMAL)
III PC board adjustment.
PLAYBACK
(1)
LEVEL
TE
L 13942296513
SIGNAL
(2)
CURRENT
(3) BIAS CURRENT
www
10

ADJUSTMENT

OUTPUT
INPUT SETTING
SETTING
DOLBY: OFF
SCC-1727
TP401(L)
TCC-153
TP402(R)
MTT-114
10kHz, -10dB
TCC-110
MTT-111
TP401(L)
SCC-1727 TP402(R)
3kHZ
TP401(L)
TCC-130
TP402(R)
400Hz
(A)
Adjust the AG
TP401(L)
for the output of the
TP402(R)
deck to be come
-20dBs at 400Hz.
Connect a
(A)
DC voltmeter
12.5kHz, -20dB
as follows.
Insert CrO2
TP405(Lch),
blank TAPE
TP404(Rch)
TP401(Lch)
GND
TP402(Rch)
VR402
(PB/R)
TP404(Rch)
TP405(Lch)
VR406
VR405
x ao
y
R BIAS
L BIAS
. i
DECK BOARD
8
CASSETTE TAPE ALIGNMENT
DECK SETTING POINTS
Recording
Power : OFF
head, erase
Demagnetization,
head, capstan
cleaning, PLAY
pinch roller
PLAY
RVS FWD
PLAY VR407
VR401(L)
PLAY
VR402(R)
Q Q
3 6 7 1 3
VR403(L)
REC PLAY
VR404(R)
VR405(L)
REC PAUSE
VR406(R)
VR404
SIGNAL
CURRENT
VR403
VR401
(PB L)
u163
.
VR407
2 9 9 4 2 8
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 —6dBs.
1 5 0 5 8 2 9 9 4
-20dBs
7mV(NV701)
5.5mV(NV301)
m
co
9 9
FIG.
2 8 9 9