78
Service Manual
5-8
Q10
5087
TP4
TP1
47
C16
R37
536k
0.1
C19
0.1
C18
CR1
S2
536k
R35
301k
R32
205k
R33
not used
not used not used
78LCD
U2
AUTO
BAR8
BAR7
BAR0
S0
DIG1 d
H4H3H2H1
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
S15
S16
S17
S18
S19
S20
S21
S22
S23
S24
S25
S26
S27
S28
S29
S30
S31
BAR60 BAR61 BAR62 BAR63
BAR59 BAR58 BAR57 BAR56
BAR52 BAR53 BAR54 BAR55
BAR51 BAR50 BAR49 BAR48
BAR44 BAR45 BAR46 BAR47
BAR43 BAR43 BAR41 BAR40
BAR36 BAR37 BAR38 BAR39
BAR35 BAR34 BAR33 BAR32
BAR28 BAR29 BAR30 BAR31
BAR26 BAR25 BAR24
BAR21 BAR22 BAR23
BAR18 BAR17 BAR16
BAR13 BAR14 BAR15
BAR10 BAR9
BAR5 BAR6
BAR3 BAR2 BAR1
0 1 2 3 MIN M A X not used
BIG - SMALL +
DIG3 g DIG3 f SMALL - DIG3 e
DIG3 b DIG3 a DIG3 d DIG3 c
DIG2 g DIG2 f DIG2 DP DIG2 e
DIG2 b DIG2 a DIG2 d DIG2 c
DIG1 g DIG1 f DIG1 DP DIG1 e
DIG1 b DIG1 a DIG1 c
DIG0 g DIG0 f DIG0 DP DIG0 e
DIG0 b DIG0 a DIG0 d DIG0 c
m AC RPM
M
VDC
1
k
not used 2
not used ---0 Hz
-0-- --0-
4--- BARV
BAR27
BAR20
BAR19
BAR12
BAR11
BAR4
SSTS15T1
Q8
205k
R34
TP2
5089
Q7
Q9
6429
S1
S1
S1
R31
649k
47
C17
TP7
BAV99
CR2
BT1
9V
1.00M
R36
D
DGND
PS1
S26
H1
VSS
VOBVOA
H2
H3
H4
S0
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
S15
S16
S17
S18
S19
S20
S21
S22
S23
S24
S25
S27
S28
S29
S30
S31
INTEGRATED
MULTIMETER
IC
D
VSS
PS2
REFH
PS0
VDD
BIAS
DO
P21
AZEN
P31
P32
P33
RES*
TEST
P00
CK1
CK2
PUD*
TT
F0
F1
F2
P13
VDD (SERIES)
REGULATOR
COMMON (SHUNT)
REGULATOR
U1
S1
R30
0.1
C15
0.1
C21
TP3
6
ON
POWER SUPPLY
BUTTON
PUSH
SWITCH
FUNCTION
S1 KEY
DIGIT
a
b
c
d
e
f
g
0 = VSS
*1 = COMMOM
POSITION FUNCTION
1
2
3
4
5
6
7
8
OFF
VAC/Hz
VDC/Hz
DWELL/%
RPM
OHMS/CONT
TEMP/DT
CURRENT
F2 F1 F0
- - -
1 0 0
1 1 0
0 1 1
0 0 0
1 0 1
1 1 1
0 1 0
FUNCTION CODE*
S1 BOTTOM
OFF POSITION
1
2
3
4 F0
5
6F1 7
F2 8
9
VSS 10
11
12
10V
T
T
10V
1 161736
2
3
12
13
14
15
18
19
20
21
22
23
4
24
25
26
27
28
29
30
31
32
33
5
34
35
6
7
8
9
10
11
810
710
410
110
90
40
5150
4
56
29
28
27
26
25
24
54
53
23
52
49
48
47
46
45
44
43
42
41
22
39
38
37
36
35
34
33
32
31
30
21
20
55
3
5
6
7
19
18
17
16
10
9
70
69
68
67
65
64
57
63
62
61
60
14
59
58
8
VSS
VSS
REFH
VDD
VSS
VBT-
VSS
VBT+
VSS
FLUKE 78-1201
(3 of 3)
zr15f.eps
Figure 5-1. A1 Main PCA (cont)
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