Bw
SCHEMATIC
DIAGRAM
(This schematic diagram may be modified at any time with the development of new technology.)
1
2
Pp) FG amp. circuit
a1
2SD549
St Power
Q301,302
2SD636
Notes:
1. $1
:
Power (Arm) switch in ''on" position.
2. $3
:
Voltage adjuster switch in ''220 — 240V"' position.
110
—120V —~ 220
— 240V
3. $201
:
Speed selector switch in ''33-1/3 r.p.m."' position.
33-1/3 r.p.m.<—® 45 r.p.m.
4. The value in [__] in the standard voltage for this unit operated
at 33-1/3
r.p.m.,
which
was
measured
by DC electronic volt-
meter (high impedance) on basis of the chassis.
Accordingly, the
voltage value may sometimes include a slight error depending on
the internal
impedance
of the DC voltmeter
(tester, etc.) used
for the measurement.
5.
Important safety notice:
Components
indentified by A\ mark have special characteristics
important for safety.
When
replacing any of these components,
use only manufacturer's specified parts.
6.
mmm
+() voltage line.
Speed
R201 20K B
R206 68K
1
C205
0.047
Pitch contro!
C203
0,033
e Reference voltage and waveform at each IC
terminal (Pin)
This indicated voltage values and waveferm are measured
by oscilloscope at 33r.p.m. rotation.
1C101 (AN6636)
e Terminal guide of transistors and IC
[ AN6636
2SD549
SZ,
8
13
c
H-300A
2SD636
'
2SB641
'
Be
