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Amos AWB 210 User manual

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AWB210 (AMOSAWB210SM20140309)
Water Bath
Service Manual
www.amos-scientific.com
AMOS SCIENTIFIC PTY.LTD. ABN37 159 778 140
AWB 210 Water Bath AMOSAWB210SM20140309
---1---
AWB 210 Water Bath
Service Manual
1:
The Service Manual of the instrument is compiled according to its structure and characteristic.
2:
The instrument provides the design ofAC110V/ 220V, water tub heating and temperature controlling system.
3:
4:
A、The screen has no display when the machine turns on.
1):The power supply is not connected well or the fuse is blow out, please
connect the power supply again or replace the fuse.
2):power module is damaged
Maintenance : Loosens the six screw in the base-plate with philip
screwdriver,and take down the base-plate,and there will be a power source
module on the main board in the instrument as it shows on the picture. And
①Sensor
②Heater
③Base- plate
④Water though
General Provisions
Confi
g
uration
Ex
p
loded View
Troubleshootin
g
AWB 210 Water Bath AMOSAWB210SM20140309
---2---
take down the power source module from the main board by hand,if it is
difficult to take down the power source module with hand,you can use the
flat apparatus as slotted screwdriver to take down the power source module
by inserting the flat apparatus in the slot and tipping it up slightly, and
then take it down and replace a new power source module.
B、It shows incorrect temperature(offset the set temperature)
1):Digital sensor is broken
Maintenance : Loosens the screw with the screwdriver, and you will see
the digital sensor as it showed in the picture, and then Loosens the screw
in the sensor to replace the sensor.
2):IC is broken
Maintenance: Loosens the screw with the screwdriver, and you will see the
IC as it showed in the picture. you can use the flat apparatus as slotted
screwdriver to take down the IC by inserting the flat apparatus in the slot
and tipping it up slightly and then take it down to replace a new one.
C、There is continuous ring in buzzer(the interval is 10 seconds)
It means that the digital sensor is broken, and need to replace.
AWB 210 Water Bath AMOSAWB210SM20140309
---3---
D、The machine is unable to heating after power on .
1):heating film is damaged
Maintenance :Loosen the six screws in the base-board with the philip
screwdriver, take down the base-board and you will see the
heating film as it showed in the picture. And then loosen
the four screws on it to replace the heating film.
2):Solid state relay is broken
Maintenance:Loosen the six screws in the base-board with the philip
screwdriver, take down the base-board and you will see the
solid state relay as it showed in the picture. Take down the
damaged SSR to replace a new one.
Heating film Digital sensor
IC Power source module Solid state relay
Inside Schematic diagram
AWB 210 Water Bath AMOSAWB210SM20140309
---4---
5:
HEAT-2.CPU
P=330W
Heater
LN
NL
J-Heat
220V/110V
NL
GND
Power Socket
F1
5A
220V Switch
110V/220V---5
A
1
5
23
46
Filter
Soleplate
1 2 3
- +
1 2 3
GND Vcc
DQ
N
L
N
L
Sensor (DS18B20)
Wirin
g
Dia
g
ram
AWB 210 Water Bath AMOSAWB210SM20140309
---5---
6:
EA/VP
31
X1
19
X2
18
RESET
9
RD 17
WR 16
INT0
12 INT1
13
T0
14 T1
15
P10
1
P11
2
P12
3
P13
4
P14
5
P15
6
P16
7
P17
8
P00 39
P01 38
P02 37
P03 36
P04 35
P05 34
P06 33
P07 32
P20 21
P21 22
P22 23
P23 24
P24 25
P25 26
P26 27
P27 28
PSEN 29
ALE/P 30
TXD
11 RXD
10
VCC 40
GND 20
+5V
C3
89S52
+5V
1
2
3
4
SSR1
+5V
+5V
+5VC1
C2
S1
S2
S3
S4
R19 R20R18R17
+5V
1
2
3
DS18B20
+5V
+5V
+5V
R16
R13
R14
1
2
3
4
IC1 (DC)
+5V
R10
R11
R12
R4
R3
R7
R2
R1
R6
R5
R8
R9
+5V R15
Y1
1
2
INPUT
1
2
220V
B1
T1
T5
T2
T3
T4
1 2
3 4
5 6
7 8
24c02
+5V
P2.4 P2.5
S-CPU
1
2
FAN LED
8 912 3 5 6 10 1 42 711
LED3
Schematic Dia
g
ram
Published by:


AMOSSCIENTIFICPTY.LTD
37/632 CLAYTON ROAD , CLAYTON SOUTH VIC 3169 , AUSTRALIA
Tel: +61-3-95518850 Fax: +61-3-95516885
ABN 37 159 778 140
www.amos-scientific.com