— 4 —
Vcc1-1
CP100
R108
270 K
R110
270
Q110
2SD1819A-R
Q111
2SD1119-R
C137
R107
D100
MA142WK 33 K
B6800 p
C140
470 p
R115
100
6.3 V 220
C100
D110
MA3051-L
2.2
BH102K
TM100
Q101
2SD1819A-R
2.2K
R113
R105
3.3 K
VR100
2 K
C105
GND
C145
B1500 p
CP101
1
2
9
6
3
4
5
6
7
8
T100
LC12U-35
D158 MA143A
R160
68
(D: 180)
C146
220 p
D156 MA142WK
D154 MA142WK
D150
MA142WK
D152
MA142WK
L101
100 u
L102
330 u
CP110
CP111
CP113
CP114
CP115
C110
25 V 10
C114
6.3 V 220
C116
6.3 V 220
C120
35 V 22
R150
33 K
Vcc2-2
Vcc7 (29.5 V)
Vcc6 (11 V)
Vcc2-1 (4.5 V)
VEE1 (-7.5 V)
VEE2 (-18 V)
GND
(3.9 V)
C112
16 V 47
C118
16 V 22
C150
OPEN
CIRCUIT DESCRIPTION
POWER SUPPLY
Figure 1
Name
Voltage
Function
VCC2-1
4.50
±
0.02 V
Main voltage
VCC7
25.9 ~ 31.3 V
Tuning voltage
VCC6
10.8 ~ 12.0 V
Display voltage
VEE1
–8.5 ~ –7.5 V
Display voltage
VEE2
–19.8 ~ –17.2 V
Display voltage
Table 1
The power supply consists of a DC-DC converter and the associated circuit and supplies the voltages as shown
in Table 1.
