Amos AWB 210 User manual

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: [phone] Fax: [phone]
ABN 37 159 778 140
www.amos-scientific.com