87V/AN
Service Manual
40
Figure 8. A1 LED PCA (cont)
COM
OUT
CAV
PDN
VIN
CC
VSP
VSM
V-
V+
V-
V+
VCC
C1
C0
B1
A1
VEE
GND
E
B
C
S2
S1
S0
B0
A
A0
9.997M
1.106M
110.01K
10.4K
440.4
26
AMP
V+
FE_O
48
46
19
FIL_C
-
29
30
31
FAMP_M
OUTPUT
49
CURRENT SOURCE
ISRC
CPC_S2
RJT_I
CPC_H
CURRENT
CONTROL
OUTPUT
&
LATCH
COMPARATOR
+
COMP
+
CONTROL
AMP
FILTER
GUARD
32
47
7
4
45
44
43
18
17
R4
GRD
CONV_IN
FIL_IN
R3
R2
16
15
14
13
R1
12
11
25
23
24
-
+
AGND
COMP_O
GRD
DIV_A
R0
SCK
SDI
ACAMP_O
V-
SENSE_HI
GRD
CNTL
1
2
5
6
8
9
10
CS*
POR*
IR2
IR1
3
CPC_S1
ZERO_IN
FAMP_O
27
20
DC AMP
-
36
35
33
COMPUTER
INTERFACE
37
34
-
FREQ
ACAMP_M
SATION
38
AC COMPEN-
+
-
LEVEL
ADJUST
22
+
COMPARATOR
AC AMP
28
V-
V-
40
21
39
+
-
41
42
GRD
52
50
51
4
3
DT, mA
TP6 S1-2
TP7 S1-6
TP8 S1-7
TP9 S1-8
REF DES NAME
TP3 S1-10
TP4 S1-3
TP36 PB3/BTXD
TP2 S1-14
TP1 S1-9
REF DES NAME
TEST POINTS
TP32,33 RST*
MODEL
TP17 +2.5
TP35 BRXD
mVDC (Temp)
(MODEL 87 ONLY)
RMS/AVG CONVERTER
(MODEL 83 ONLY)
TP23 RXD
PEAK DETECT
MUX
(MODEL 87 ONLY)
TP11 S1-4
TP29,30 TMS
TP28 -2.5
BOOTLOAD
TP24 TXD
TP5 S1-1
TP18 LCD_R23
TP16 POWER
TP15 BTP
TP12 GND
COMMON
TP13 Vbe
AMPS
TP20 SWPOS
DT
mVDC (Temp)
Ohms (Cap, Cont)
V/OHMS
TP21 VRSOB
UPPER TOP SHIELD CONTACT
UPPER TOP SHIELD CONTACT
TOP/BOTTOM SHIELD CONTACT
800 HZ FILTER (MODEL 87 ONLY)
TP14 BACKLIGHT
TP10 S1-5
MODEL 87 ONLY
TP34,38 +0.8
(MODEL 83 ONLY)
TP31 TCK
Ohms (Cap, Cont)
VDC, mVDC (Temp)
TP37 MODEL
JTAG
TP25 TDO
TP26,27 TDI
LOCATE NEAR
V TERMINAL
SERIAL COMM
MA/UA
TP22 LOWBATT
TP19 LCD_R13
Ohms (Cap, Cont)
uAmps
mAmps
2%
1W
.010
R6
TP4
MUXSW2
R30
C6
6
NOLOAD
100P
NOLOAD
C47
0.001U
220 OHM
TP7
1000V
AC*
LPSW
LOWPASS
C1
C0
C
R1
1K
5
0.5%
10MM
Z2
2.5MM
2
910V
1.5MM
0.001U
C33
+2.5
R94
499K
R52
249K
100P
C56
100K
8
8MM
65 MIL
440MA
AC1
4
4
2
3
1
F1
8MM
10.0M
-2.5
0.001U
C32
0.001U
C34
CR2
P
RV2
2.5MM
C43
4
226K
R29
R87
102K
CR1
32
COMMON
MMBT3904
0.1U
100K
0.0027U
0.01U
3.01K
2.80K
GRD
ASCK
+2.5
-2.5
DIN
ACS*
APOR*
2.5MM
2.5MM
2W
1.00M
22U
4
4
4
8.2V
97.6K
1K
1.00M
BAV199
CPH
220 OHM
-2.5
-2.5
1K
0.01U
MAJACK
261_MIL_WIDTH
BAV199
60_OHM
10.0M
5%
499K
COMMON
8MM
MECCA
0.0068U
0.0
5
24.9K
ICNTL
+2.5
OPA2347
+2.5
1.00
1%
COMMON
226K
390P
0.1U
BAV199
1.10K
910V
11A
8MM
261 MIL
0.01U
1M
1M
1.00M
0.022U
AJACK
1.00M
1M
0.022U
MMBT3904
107K
1W
20%
BAV199
CPH
5
1000V
0.01U
60_OHM
100P
-2.5
910V
NOLOAD
10.0
-2.5
NOLOAD
NOLOAD
60_OHM
+0.8
6.5MM
0.022U
NOLOAD
ADIN
100K
RT1
1
R3
C1
R9
R5
Q3
C2
C4
C5
C9
C10
R17
R18
R8
R12
L1
RV3
RV1
R2
R51
E1
F2
1
3
2
4
J1
7
8
J1
5
6
R28
R35
R34
U7
5
1
8
3
2
4
7
R10
R7
C26
C31
R11
R48
AC2
N
J1
3
J1
12
M1
R85
U4
6
5
7
4
8
U4
2
3
1
4
R86
R88
C36
C37
C38
R36
R37
Z1
1
2
Z1
3
6
Z1
6
5
6
7
6
Q6
R32
TP6
TP5
TP10
TP11
TP8
TP9
TP13
TP12
L2
R104
CR5
CR6
S1
1
3
S1
1
2
29
S1
5
4
CR9
1
2
3
R100
VR1
CR10
1
2
3
L3
R103
U1
S1
6
7
8
C39
R105
E2
E3
L4
L5
R111
856
-2.5
18
31
33
34
30
21
1
11
12
16
13
17
8
9
7
24
19
15
2
3
4
6
5
28
35
36
29
20
23
27
26
25
14
22
-2.5
BTP
0.0
7
16
9
10
11
8
6
3
5
4
1
2
15
13
12
14
U12
74HCT4053
-2.5
226K
MMBT3906
Q7
-2.5
OPA2347
0.0
6
R33
1.00M
C7
5
33U
AD737J-2.5
6
0.001U
C35
+2.5
5
BAV199
3
2
1
CR8
499K
R101
C3
R4
110
-2.5
FASTADIN
ODCMP
2K
R112
R113
1.5P
180P
Z1
Z1
C52
C58
NOLOAD
10
200K
MMSZ5237B
S1
180P
49.9K
C46
8X-5-1001
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