Roche 91 Series - Page 79

Roche Diagnostics April 2007
Service manual · Version 2.0 A-65
91xx pH/Electrolyte Analyzers 5 Electronic diagrams
Electronic diagrams
SBC PCB - Fluid pack detector - 9180, 9181
Figure A-30 SBC PCB - Fluid pack detector - 9180, 9181
ZD5015
G
SCHEMATIC, MAIN BOARD 9180 / 9181
311Monday, May 03, 1999
Title Size Document Number Rev Date: Sheet
of
D18 1N4148
2 1
CP
U41 LM2907N-8
1 8
2
3
4 5
6
7
VCC
C81
0.01uF
12
R920
3.3K
12
R918
3.9K
12
R919
620
12
R914 1K
1 2 C79
1.0uF
12
R916
160K
12
R921 3.0K
12
R915 160
12
ISO1 OPB712
2 1 3
4
R917 200
12
Q14 2N3904
C78
1000pF
12
VCC
V+
C80 0.01uF
1 2
R923 4.3K
12
FPDET
V+
VCC
FPCLK
A
R922 4.3K
1 2