80
Date:
April 10, 1996
Sheet
5
o
f
9
Size
Document Number
REV
B
INPUT AMPLIFIERS
D
Title
SCHEMATIC, MAIN BOARD ISE/PH
(404)587-4040
30077
Roswell, Georgia
33 Mansell Court
AVL Scientific Corp.
"Na/pH"
C49 NOT STUFFED FOR 9110
OFFSET = -1100 mv pH
OFFSET = -2200mV Na
1
2
C49
0.22uF
1
TP9
UT35-017
1
2
R63
1K
Na/pHOUT
ARE DIFFERENT FOR ISE AND pH
NOTE VALUES OF R44 AND R47
*
**
ISE
PH
1
2
C48
0.22uF
2
3
1
1 1
4
U12A
TLC279CN
1
2
R47
165K 1% ISE
102K 1% pH
1
2
R44
59K 1% ISE
18.2K 1% pH
1
2
3
JP202
HEADER 3
1
2
R113
1K
+8V
-8V
NOTE: NO SOLDER MASK IN PROBE AREA
3
8
2
7
6
4
U13
OPA103AM
1
2
R41
1K 1%
+8V
-8V
NOTE: PROBE THRU IN+ SHIELDED
INPUT AMPLIFIERS
NOTE:
GUARD RING AND PROBE AREAS
SHOULD BE CLEAR OF SOLDER
MASK.
Na/pH
P2
PROBE
1
2
R34
100K
ZPROBE2
R4WW
NOTE: PROBE THRU IN+ SHIELDED
K
P3
PROBE
1
2
R35
100K
ZPROBE4
R4WW
ZPROBE3
R4WW
3
8
2
7
6
4
U14
OPA103AM
1
2
R40
1K 1%
+8V
+8V
-8V
ISE 1-2
pH 2-3
1
2
C50
0.22uF
1
2
R46
68.1K 1%
1
2
R48
604K 1%
1
2
R114
1K
OFFSET = 0
"K"
C50 NOT STUFFED
FOR 9110
NOT STUFFED
OFFSET = -700mV
1
TP10
UT35-017
1
TP11
UT35-017
1
2
R45
43.2K 1%
1
2
R64
1K
6
5
7
U12B
TLC279CN
1
2
R111
100K
KOUT
NOT STUFFED
1
2
C52
0.1uF
1
2
R65
1K
1
2
C51
0.1uF
1
2
R112
100K
-8V
+8V
"Cl/Ca"
Cl/CaOUT
9
10
8
U12C
TLC279CN
1
2
R115
1K
3
8
2
7
6
4
U15
OPA103AM
1
2
R39
1K 1%
1
2
C300
0.22uF
1
2
R301
1K 1%
1
2
R302
18.2K 1%
3
8
2
7
6
4
U300
OPA103AM
+8V
-8V
-8V
NOTE: PROBE THRU IN+ SHIELDED
Ref
Cl
or
Li
NOT STUFFED FOR 9110
P4
PROBE
1
2
R36
100K
P5
PROBE
ZPROBE5
R4CR
1
2
R300
100K
NOTE: 300 SERIES COMPONENTS
B
R303-1 WAS TO SSEN
CUT AND JUMPER
REV G BOARDS
1
2
R303
10K
Q300
2N3904
7
1
5
3
K300
SIP RELAY SPST
2
1
D300
1N4148
GPO
VCC
-6.2V
OFFSET GENERATOR
FOR 9110 ONLY
OPEN pH
CLOSED ISE
1
2
R42
2.2K
1
2
D15
1N827
1
2
JP201
HEADER 2
-8V
13
12
14
U12D
TLC279CN
mb5.sch
SBC PCB - INPUT AMPLIFIERS - 9120, 30, 40