Roche 91 Series - SBC PCB - Pump Motor Driver; Door Detect - 9110, 9120, 9130, 9140

Roche Diagnostics April 2007
Service manual · Version 2.0 A-45
91xx pH/Electrolyte Analyzers 5 Electronic diagrams
Electronic diagrams
SBC PCB - pump motor driver / door detect - 9110, 9120, 9130, 9140
Figure A-10 SBC PCB - pump motor driver / door detect - 9110, 9120, 9130, 9140
VCC
PHASEC
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
D12 1N4004
2 1
D13 1N4004
2 1
D9 1N4004
2 1
DCLOSED
D11 1N4004
2 1
SGND
SGND
C44 0.1uF
12
R29 10K
12
SGND
PHASEA
DLED+
VCC
SGND SGND
R27 100
12
A
+VS
+ -
V- V+ B BS
GND
U11 LM311N
2 3
7
8
5
6
4
1
VCC
ZS2 DIP20
ZD5005 F
SCHEMATIC, MAIN BOARD 91XX
4
9Thursday, June 27, 2002
Tit le Size Document Number Rev Date: Sheet
of
VCC
SGND
PHASED
D7 1N4004
2 1
SGND
PUMP DRIVER
SGND
PHASEB
SGND
DOOR
R28 10K
12
SGND
C42 0.1uF
12
R26 1
12
+VS
R33 2.2K
12
SAMPLE DOOR SWITCH DETECT
C45 0.1uF
12
+
C46 100uF/50V
12
VCC
SGND SGND
SAMPLE DOOR
VCCVCC
PUMPSTEP
SGND
R32 562 1%
12
D10 1N4004
2 1
R25 1
12
+22V/12V
+VS
VCC
C41 0.1uF
12
R24 10K 1%
12
+
C47 10uF/16V
12
SGND
mb4.sch
SGND
R23 22K
12
+VS
SGND
C43 3.3nF
12
R31 100K
1 2
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
PUMPEN
D8 1N4004
2 1
VCC
SGND
SGND
ZS1 DIP20
R30 33K
12
D14 1N4004
2 1