Roche 91 Series - SBC PCB - Pump Motor Driver;Door Detect - 9180, 9181

Roche Diagnostics April 2007
Service manual · Version 2.0 A-59
91xx pH/Electrolyte Analyzers 5 Electronic diagrams
Electronic diagrams
SBC PCB - pump motor driver/door detect - 9180, 9181
Figure A-24 SBC PCB - pump motor driver/door detect - 9180, 9181
VCC
SGND
C45 0.1uF
12
ZS1 DIP20
+VS
SGND
VCC
C41 0.1uF
12
R29 10K
12
VCC
SGND
DOOR
SGND
D9 1N4004
2 1
SGND
DCLOSED
D10 1N4004
2 1
+VS
D14 1N4004
2 1
D8 1N4004
2 1
PHASED PHASEB
D12 1N4004
2 1
R30 33K
12
R25 1
12
SGND
SGND
ZD5015
G
SCHEMATIC, MAIN BOARD 9180 / 9181
611Monday , May 03, 1999
Tit le Size Document Number Rev Dat e: Sheet
of
SGND
D13 1N4004
2 1
SGND
D7 1N4004
2 1
SGND
PHASEC
+VS
DGND
A
SGND
PUMPEN
VCC
+ -
V- V+ B BS
GND
U11 LM311N
2 3
7
8
5
6
4
1
R28 10K
12
SGND
VCC
VCC
PHASEA
C44 0.1uF
12
DOOR SWITCH DETECT
+VS
C43 3.3nF
12
R31 100K
1 2
VCC
R32 562 1%
12
PUMP DRIVER
R23 22K
12
SGND
GND
VCC
R26 1
12
R24 10K 1%
12
SGNDSGND
U9 L293E
2 1 9
12 11 19
3 8 13 18 5 6 15
20 10
16 4 7 14 17
IN1 ENA IN2 IN3 ENB IN4
OUT1 OUT2 OUT3 OUT4
GND GND GND
VSS VS
GND
SENSE1 SENSE2 SENSE3 SENSE4
+VS
DLED+
U10 L297
4 5 6 7 8 9 14 13 15
17 18 19 20 11 10
212
16
1 3
A
INH1
B
C
INH2
D
SENSE1 SENSE2
VREF
CW/CCW
STEP HALF/FULL RESET CONTROL ENABLE
GNDVS
OSC SYNC HOME
R33 2.2K
12
C42 0.1uF
12
+
C47 10uF/16V
12
PUMPSTEP
R27 100
12
D11 1N4004
2 1
ZS2 DIP20
+
C46 100uF/50V
12
VCC
SGND