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........................
.
.
. .
.
. f'2
~Jl-'i U1
Display
~Jl-Ei DC power
CR1 to J23
~Jl-4
U3
Rl9
VR1 100
2KB
0.1u
C6
Rl4
R28 S.6KJ
lKJ
C8 R29
22U 30K
U4
17431
R26
10K
R15
3KF
R27
1K
Ul3
17431
C10 R37
lU
0. 100 ClS
CR6
F5
+15.8V 4.7U
C54
5.1V
C11 JUMPER 100
4.7U
0.01u
R16 Base cntl Voltge
R40
JUMPER
8k2
R34 0.15 VR7 VR8
R13 R3 9 To
J3 +15.8V R35
510
........
10k8 lKB Display
Board
0.12 J6
CR17 R4B TO J24
100k
VR6 02
10k8
+ C19
CR19
0V also connected to Out-V
4 2N3772
. CR15
1N5402
+ C17 OUTPUT
51
C18
C56
o.1u T
0.022U
TOPWARD ELECTRIC INSTRUMENTS CO LTD.
itl ..
u1 DC POWER SUPPLY MAIN CONTROL CIRCUIT
.,..
...
3303D D
11
11 11
LTC-5836G
B
1 330.1
330
'( i
'111 11111
1 1 11
:
J13
J12
11 11
GND
111 111
111 111
1
U9 7107
7107
V V A vv
G
V V
I B i ACC
- -+
vv vv - -+
C25
.
C20 o.22u
0.22U
- C22 R69 1oop' R61
R5l C24 R53 LOOP RS2 47K
47K C28 o.1u 100K
0.1U 6.04K 100K
0.01U C26 R65
C21 R56 0.47U R64 12K
0.47U R55 VR12 154K 1M
1M 1K8
R,3 U12
17431 R66
R54 17431 R57
.
264 330
267 330 R67 R68
R58 R59
l
1K VR13
1K 1M 5K8 4
3
1
1 2 FROM J9
FROM J4 2 3
3 4
4
TOPWARD ELECTRIC INSTRUMENTS CO.LTD.
Title
DIGITAL A/D CONVERTOR & DISPLAY
v
3303D
3303D 3303D
T 32.SV 100V 2A
T1-*2 1BV 120V 2A
T1-*3 7.5V 220V 1A
R3 22.lKF 240V lA
RB 54.9K
R9 9.09K
R10 12.4KF
R16 3.9KJ
R17 2.37KF
R34 8 . 2KJ
R38 0.15
R39 0 . 15
R6B 4 . 42KF
C16 1U/50V
C17 100U/50V
C19 6800UF
CR16 D-620
CR17 D-620
CR18 D-620
CR19 D-620 TOPWARD ELECTRIC INSTRUMENTS C O LTD
3303D
'\ Date: Sheet 3 of 3