Hitachi PS-38 - Page 8

MODEL
PS-38
SERVICE
MANUAL
MODELL
PS-38
SERVICE
ANLEITUNG
MODELE
PS-38
SERVICE
MANUAL
etieneteteredere
ee
Oa
1.
Detaching motor, control panel, tone arm
Remove then dust cover and platter, fix the tone arm
to the rest, then remove the base board and execute
the following:
(1) Detaching the motor
Remove the motor lead wire from the terminal
of the AC supply printed wiring board, remove
the motor fixing nut, then detach the motor by
lifting it. (Fig. 5)
(2)
Detaching
the
control
panel
Remove the control panel lead wire from the
terminal of the AC supply printed wiring
board, then remove the ground wire connecting
the motor and the US holder and remove the
control panel fixing screw as shown in Fig.5.
(3) Detaching the tone arm
Remove the US holder fixing screw shown in
Fig. 5. Then detach the tone arm lead wire
from the US 2-pin jack and remove the tone
arm fixing screw.
Cartridge attaching
Perform installation or replacement of the cartridge
as follows.
(1) Attach the cartridge to the head shell with
cartridge fixing screws.
(2) The polarities and L, R channel of the lead
wire of the head shell are shown in Fig. 6. The
connection should be done according to the
terminal indication of the cartridge.
Removal of Dust Cover
The dust cover is designed for easy removal. When
the turntable is to be used without the dust cover,
°
Slide the cover carefully in the direction of the arrow
@ as shown in Fig. 7, then pull it in the direction of
the arrow (2).
To replace the cover, simply follow the above
instructions in the reverse order.
Stroboscope
The servo amplifier is unstable for approx. 30
sec. after power is switched on, so. adjust speed
30 secs. after the platter starts to rotate. Generally,
the frequency of household a.c. is very stable, but
this is only over the long run and in the short term
there may be variations of about 0.2%. Because of
this, the stripes of the stroboscope may appear to
move in one direction or the other depending on the
frequency of the power source which lights the neon
lamp, even if the speed of the platter is correct. In
this case, it is not necessary to adjust the speed.
Another point which you should note is that, if the
speed is adjusted with the stylus not in contact with
‘the record, when you play a record, the stripes of
the stroboscope may appear to move slightly. The
variation in speed due to this is as little as 0.1% and
this will not affect the sound of the music.
Tone arm fixing screw US holder fixing screw
Control panel
fixing screw
Motor fixing nuts
Fig. 5
R © Green
Y\ LC Blue
LG white
Fig. 6
Fig. 7