JWL Series

Vetek Weighing AB
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JWL
JWL Service Manual
Series
Service Manual
May not be reproduced in any form without written permission
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JWL Service Manual
Contents
Assembly drawing
1
2
1–1
Explosive view (JWL)
2
1–2
List of parts (JWL)
3
1–3
Block diagram of electronic structure
4
1–4
Wiring diagram
5
Troubleshooting procedure
6
2–1
Troubleshooting flow
6
2–2
Troubleshooting table
7
2–3
Confirmation of application environment
7
2–4
Simple inspection of electric circuit
8
2–5
Performance inspection
8
Maintenance and setting
9
3–1
Maintenance flow
9
3–2
Model setting
9
Setting of parameters
10
4–1
Parameter setting
10
4–2
Description of parameter values
11
4–3
Unit setting
13
5.
Linear calibration
17
6.
Single point calibration
19
7.
Error message list
21
8.
External interface
22
8–1
RTC function setting
22
8–2
Signal output pins of three-in-one board
24
8–3
Single option
24
8–4
Two options
34
8–5
RS232 output format
36
9.
Others
38
10.
41
10 – 1
Circuit diagram
CPU, peripheral and other circuits
41
10 – 2
LCD circuit
42
Applicable mainboard version and software version
42
I.
2.
3.
4.
10 – 3
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1. Assembly Drawing
1 – 1 Explosive view
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1-2 List of parts
No. Name
Quantity
Part No.
Material No.
1
xm
JWL-Chinese
front panel
1
JWL-1
21-1925-0100
2
xm key
1
JWL-2
21-0506-0100
3
xm level meter
1
JWL-3
02-0108-0003xm(14mm)
4
Xm transformer
1
JPL-4
61-0003-0400
5
Xm switch
1
JWL-5
60-0000-0000xm
6
Xm power socket
1
JWL-6
80-0125-0000
7
xm
semi-finished
JWL board
1
JPL-7
60-0503-0001xm
8
Xm lower cover
1
JWL-8
02-0000-6020
9
xm lower support
1
JWL-9
10-0425-0100
10
Xm
1
JPL-10
31-0404-0000xm
screw
for
transport protection
11
Xm rubber levelers
4
JWL-11
01-0100-0030
12
xm RS232 board
1
JCL-12
80-0900-2200xm
13-1 xm sensor - Chung
Yuen 3k
1
JWL-13
51-0400-0400xm
13-2 xm sensor - Chung
Yuen 5k
1
JWL-13
51-0410-0000
13-3 xm sensor- Chung
Yuen 10k
1
JWL-13
51-0410-0010
13-4 xm sensor - Chung
Yuen 20k
1
JWL-13
51-0410-0020
13-5 xm
1
JWL-13
51-0410-0040
Yuen
sensor - Chung
40k
14
Xm storage cell
1
JWL-14
61-0201-0098xm
15
Xm cell cover
1
JWL-15
02-0000-6030
16
Xm rear PCB
1
JPL-16
80-0126-0010
17
xm upper support
1
JWL-17
10-0425-0000
18
xm upper cover
1
JWL-18
02-0000-6010
19
xm rear panel
1
JWL-19
20-0000-6040
20
xm
plastic
down-warped pan
1
JCL-20
02-0000-6040
21
xm
1
JCL-21
12-0000-1200
stainless
steel
down-warped pan
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1 – 3 Block diagram of electronic structure
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1 – 4 Wiring diagram(圖中中文應去除)
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2. Troubleshooting Procedure 2– 1 Troubleshooting flow
START
LED acts or not
LCD, backlight, buzzer,
No
Yes
No
Check battery wiring
for loosening
LCD displays completely or not
No
Check battery for
damage or power
failure
Yes
Check, repair machine
board or replace it
No
Connect battery wiring
Confirm application environment
Yes
Return to START
Return to START
LCD display status
Charge or replace battery
Check power supply
switch for failure
Yes
LCD display Err5
Check for AD internal
No
COUNT value
Yes
Replace machine board
and repair
Cannot zero or
STABLE flashes
No
Check AD COUNT
value for instability,
replace machine
board, and repair,
interference exists or
not
Can it work or be charged
with AC power supply
Replace power supply
switch
Can zero or not
No
Yes
Yes
Object interference exists
near scale pan or not
Charge or replace
battery
Return to START
No
Display weight
Return to START
Return to START
Adjust AD value
Transport protective screw
is disassembled or not
No
Can weigh or not
No
No
Replace machine board, and repair
Yes
Return to START
Return to START
Yes
or replace LOAD-CELL
Return to START
No
Check, repair machine
board or replace it
Zero point, weighing
is stable or not
Yes
Recalibrate zero point
Remove transport protector
Return to START
Replace
machine board,
and repair,
interference
exists or not
Yes
Return to START
Keys are normal or not
Return to START
No
Return to START
Yes
Check machine board or
replace KEYBOARD
Weight display
can display to
MAX+9e or not
No
Replace machine board and repair
Return to START
Yes
Remove interfering object
Check transformer for
damage
Return to START
Yes
Replace transformer
Weight is accurate or not
Return to START
No
Yes
No
Linear calibration
Return to START
Linearity is good or not
Yes
Linear calibration
Return to START
Unbalanced load is normal or not
Return to START
No
Yes
Correct error at the
No
Residual creep exists
or not
Performance and function test
four corners
Yes
Check LOAD-CELL
for failure
Return to START
Return to START
Return to START
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2– 2 Troubleshooting table
Error message
Causes
LCD,
1. Cell or transformer fault
backlight board 2. Power switch fault
or
3. Power circuit fault
buzzer
4. LCD or related LCD circuit fault
does not work 5. Backlight board or backlight related circuit fault
6. Buzzer fault or buzzer circuit fault
7. CPU or oscillating circuit fault
AC current or
cell can’t be
used.
1. Power socket fault
2. Transformer fault
3. Cell fault
4. Power circuit fault
5. Main board fault
Err5
1. Overload (max weighing +9e)
2. Too high or inaccurate calibrated COUNT value.
Cell sign
1. Insufficient cell voltage or cell failure
2. Main board fault
Instable
1. The pan is interfered by any article.
indication
Bad linearity
2. There is strong wind or vibration nearby.
3. The cell voltage is insufficient.
4. There is external electromagnetic interference.
1. The pan is interfered by any article.
2. Bad L/C
2– 3 Confirmation of the application environment
a. Is there a strong wind in the workplace?
b. Is there vibration or instability in the workplace?
c. Is there any article on the pan?
d. Is the stainless steel pan placed on the tray?
e. Has the screw for transport protection been removed?
f. Is the scale set on a horizontal plane?
2 –4 Simple inspection of electric circuit
a. Check if the power supply is normal
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1. Is the voltage 5V at both E+ and E- terminals? Check whether the CPU supply is normal.
b. Check the signal input
1. Check if the outputs from S+ and S- terminals to G change in accordance with the weight on
the pan.
c. Check the digital signals
(1) Check if there is oscillation in Y1’s output pin.
(2) Check if there is oscillation in Y2’s output pin.
2 – 5 Performance Inspection
a. Repetitiveness
Put the weight of two thirds of the load on the pan for five times , the indication difference
between different times should be less than or equal to one division value.
b. Unbalanced loading error
Put the weight of one third of the load on the pan (as shown in the figure). Check if the figure is
precise. The indication difference between the four corners should be less than or equal to one
division value.
a
c
e
b
d
c. Linearity
Load conditions
Idle ~ one third of the load
One third of the load ~ two thirds of the load
Two thirds of the load ~ full load
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Permissible error
0e
1e
2e
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3. Maintenance and Setting
3 – 1 Maintenance flow
Change LOAD-CELL
Model setting
Refer to Page 9
Linear calibration
Refer to Page 17
Single point calibration
Refer to Page 19
Parameter setting
Refer to Page 10
Performance inspection
Refer to Page 8
3 –2 Model setting
Model setting: Press MR to turn on the unit (the LCD will display 3.0000) and then press UNIT
to select the unit model (for example:1.50000, 3.0000, 6.0000, 7.5000, 15.0000, 30.000 ).
Press G/N and the unit will display “dIu-01” and enter accuracy selection. Press UNIT to
select from diu-01 (1/30000), diu-02 (1/15000), diu-03(1/6000), diu-04 (1/3000), etc. and then
press G/N to store the setting and return to the weighing mode.
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4. Setting of Parameters
4-1 Parameter setting
(1). In weighing mode, press and hold
down
for 3s or press
and release it till the unit is
on.
will appear first and
then a parameter value such as
”
” will appear, accompanied
by an auxiliary sign
(2). Use
or
.
to select the
parameter items (as shown in the
table below).
(3). Use
or
to select
the values of parameters.
(4). When the setting is completed,
press
to store the setting
and return to the weighing mode.
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4-2 Description of parameter values
Item
Function
Display
Description
No setting
☆
Automatic turn-off
will be
executed when the
P00
weight is smaller
than 9 divisions.
5 min
10 min
30 min
60 min
90 min
P01 Buzzer beep
☆
☆
There will be an acoustic warning
when the weight of the material is
between the preset upper and lower
limits (including the upper and lower
limits).
There will be an acoustic warning
when the weight of the material is
beyond the preset upper and lower
limits and the weight is more than 20
divisions.
There will be an acoustic warning
when the weight of the material is less
than the preset lower limit and the
weight is more than 20 divisions.
There will be an acoustic warning
when the weight of the material
exceeds the preset upper limit.
PC output
Dot-matrix
P02 Printer selection
RS-232
P03
transmission rate
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Automatic sticking, paper size:
5cm*3cm
Automatic sticking, paper size:
5cm*3cm
Automatic sticking, paper size:
5cm*3cm
The transmission rate is 2400
The transmission rate is 4800
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☆
Turn-on or off of
the weight check
P04
memory
☆
☆
P05 Parity check
JWL Service Manual
The transmission rate is 9600
Automatic turn-on of the check
mode when the unit is turned on
next time.
No automatic turn-on of the
check mode when the unit is
turned on next time.
No parity.
The parity can be odd or even.
Backlight display will be on for
the whole process
No backlight display
P06 Backlight selection
☆
Backlight display will be on
when the weight is greater than
9 divisions.
Manual printing
P07
Printing mode
selection
☆
Stable printing (the next printing
will be made only when the
indication is returned to zero.)
Continuous printing
☆
Worst vibration resistance
Average vibration resistance
Filter grade
P08
selection
Good vibration resistance
Best vibration resistance
P09
Zero indication
range
☆
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No restriction
indication
PAGE
on
the
zero
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At a zero indication, only when
at least 2 divisions or above is
put on the pan will a value be
indicated.
At a zero indication, only when
at least 3 divisions or above is
put on the pan will a value be
indicated.
At a zero indication, only when
at least 4 divisions or above is
put on the pan will a value be
indicated.
At a zero indication, only when
at least 5 divisions or above is
put on the pan will a value be
indicated.
At a zero indication, only when
at least 6 divisions or above is
put on the pan will a value be
indicated.
P10
Factory initialized
setting
P11 Unit setting
It is a factory set value.
The specific operation is as
follows:
4-3 Unit setting
(1). Mode 1: press
to turn
on the unit till the left picture
appears.
Mode 2: in the weighing
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mode, press
3s, press
for about
or
to
select the parameter P11 and
press
to enter the left
picture with
appearing on
the lower left corner.
(2). Press
to select the
unit from g\ kg\ lb\ jin-liang for
the scale.
(3). Press
to store the
selection and switch to the
setting of unit for use, with
appearing on the lower
left corner.
(4). Press
to switch the
unit for use. Press
to select turn-on or turn-off of
this unit.
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(5). Press
to store the
selection and switch to the
memory unit of the scale,
with
appearing on the
lower left corner.
(6).Press
and select YES
(the unit will be the previously
used one when the scale is
turned on) or NO (the unit will
be a newly set one when the
scale is turned on).
(7).Press
to store the
selection and return to the
weighing mode.
Note: If the unit setting is accessed from the
parameter options or by Mode 2, press
to store the selection and then press
to return to the weighing mode.
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5. Linear Calibration
☆If the linear calibration is made, there is no need to make the single
point calibration. If the sensor has a good linearity, make the single
point calibration directly.
(1).Press
to turn on the
unit and release the key when
appears on the LCD, the
linear calibration mode is entered.
(2).Press
to do the zero
point calibration and wait for ON 0
to appear (No weight is put on the
pan at this time).
(3). Wait till ON 1 flickers on the
LCD and put on the weight 1/3 of
the full load. For example, 1/3 of
the weighing 30kg is 10kg.
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(4). Wait till ON 2 flickers on the
LCD and put on the weight 2/3 of
the full load. For example, 2/3 of
the weighing 30kg is 20kg.
(5). Wait till ON 3 flickers on the
LCD and put on the weight of the
full load.
(6). Wait till PASS appears. Now,
take away the load from the pan.
(7).Press
to return to the
weighing mode.
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6. Single Point Calibration(底下少圖
底下少圖)
底下少圖
(1).Press
to turn on the
unit and release the key when
appears, the single
point calibration mode is
entered.
(2). Press
and wait till
ZERO flickers. Now make the
single point calibration.
(3). Wait till a value appears and
the most right digit flickers. Press
or
to move the
flicker right or left.
(4). Press
or
to
alter the value.
(5). After the setting, put a
corresponding weight on the pan
and press
. When the LCD
flickers, make the single point
calibration.
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(6). Wait till PASS appears. Now,
take away the load from the pan.
(7). Press
to return to the
weighing mode.
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7. Error Message List
Error
message
Possible causes
Solutions
E02 no.samp
No PCS sampling
E04 EE.ERR
EEPROM reading error
Re-weld the EEPROM or contact
the service department.
E05 out.ran
Overload (max weighing+9
divisions)
Take away the overload.
E07 E.Lo>Hi
The upper limit set for the
weight check is lower than
the lower limit.
Press
sampling.
to make the
Press
to correct the
setting of HI/LO.
The unit set for the weight
Close the weight check or re-set
E08 CK.UNIT check is not the same as the
the value of HI /LO.
current unit.
EU.nit
Interference between the
accumulation units
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Return to the last accumulation unit
or re-do the accumulation.
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8. External Interface
☆ If an external interface is needed, please select a three-in-one board, which
combines RTC (time display) ,RS-232 and Relay (weight check) on one
circuit board. Only by selecting this board can the three functions be
realized.
☆ After a three-in-one board is selected, a setting should be made on the scale
for time display if necessary.
8-1. RTC function setting
(1). Press
for 3s till time
display appears, with
on
the lower left corner.
(2). Press
or
to
switch to date-month or year
display.
Note: For time/date setting, skip
to Step 3 and for returning to the
weighing mode, press
(3). Press
.
to enter the
setting for the current time and
the last digit for second will
flicker, with
appearing on
the
lower
left
corner,
representing that the first digit
from right to left can be altered.
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(4). Press
to
move
between the digits and a
corresponding digit will flicker
when the movement is made
from right to left. Now, press
or
to increase
or decrease the value.
Note:
or
You
may
press
to switch to the setting for
date-month or year.
(5). Press
to complete the
time setting and display the
time/date that is already set.
To return to the weighing mode,
press
Note: This time/date setting should be
made again when the scale is turned on
next time if a three-in-one board is not
selected for the scale.
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8-2 Signal output pins of three-in-one board
8-3 Single option
8-3-1 Printer output
■Parameter setting
(1). In weighing mode, press
for about 3s or press
and release it when the scale is
turned
on.
will
first
appear and then a parameter
value such as
”
” and also an auxiliary sign
.
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(2).Use
or
to
select a parameter item such as
PO7. Press
or
to select the parameter value,
with
the
printing
modes
including
/
/
.
(3). Follow Step (2) to select the
parameter item P02, with the
printing modes including
/
/
/
.
(4). Follow Step (2) to select the
parameter item P03, selecting the
Baud rate of
.
■Wire connecting the scale and the printer
Wire connecting ZEBRA
That is the commonly used 9male
~25male RS232 connecting wire.
Wire connecting SH-24
That is the commonly used 25male~25 male
RS232 connecting wire. You have to
exchange by yourself the pin 2 with the pin 3
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at one end of the wire bought.
Wire connecting BP545D
Wire connecting GODEX
That is the commonly used 9male ~25male That is the commonly used 9male ~25male
RS232 connecting wire.
RS232 connecting wire.
8-3-2 PC output
■Parameter
setting
(1). In weighing mode, press
for about 3s or press
and release it when the scale is
turned
on.
will
first
appear and then a parameter
value such as
”
” and also an auxiliary sign
.
(2). Use
or
to
select a parameter item such as
PO7. Press
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PAGE
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to
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select the parameter value, with
the printing modes including
/
/
.
(3). Follow Step (2) to select the
parameter item P02, with the
printing mode selected as
.
(4). Follow Step (2) to select the
parameter item P03, selecting the
Baud rate from
/
/
.
(5).When the setting is completed,
press
to store the setting
and return to the weighing mode.
■Wire connecting the scale and the PC
How to use a PC to receive the weighing information?
(1) Use the connecting wire as shown in the following figure to connect the
scale and the PC.
(2) Set the printing mode as continuous.
(3) Now, the scale will output the data to the PC.
(Of course, you must have a receiving program at the PC end.)
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That is the commonly used 9 female ~25male RS232 connecting wire. You have to
exchange by yourself the pin 2 with the pin 3 at one end of the wire bought.
Note: The hollow dots represent that the connectors are male and the black dots, female.
8-3-3 Warning light connection for use
■ Parameter setting of beeps for weight check:
(1). In weighing mode, press
for
press
about
3s
or
and release it when
the scale is turned on.
will first appear and then a
parameter value such as
”
” and also an auxiliary sign
.
(2). Use
or
to
select a parameter item such as
PO1. Press
or
to
select the parameter value, with
four modes
/
/
/
for
selection.
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(3).
When
the
setting
completed, press
is
to store
the setting and return to the
weighing mode.
■ Setting for the upper and lower limits of weight check
(1).
In
press
Triangle indicator for the upper
or lower limit
weighing
mode,
for 3s and the
screen enters the state for digit
entry. Enter the value at the first
zero on the right which flickers on
the LCD.
(2). Press
or
to
move the flickering cursor left or
right to the digit where you want
to enter a value.
(3). Press
to increase the
value or
to decrease the
value and select the weight value
you want to enter.
(4). Repeat Steps (2) and (3) to
complete the setting for the upper
limit. For example, 10.000kg.
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Note: After completing Step (4), you may
directly press
to store the upper
limit value or directly skip to Step (6).
(5). Press
Triangle indicator for the upper
or lower limit
for 3s and the
screen enters the state for digit
entry. Repeat Steps (2), (3) and
(4) to complete the setting for the
lower limit. For example, 1.000kg.
Note: you may directly press
to
store the lower limit value or directly skip to
Step (6).
(6). Press
to start or cancel
the check.
(7). Press
to return to the
weighing mode. If the triangle
indicator for the upper or lower
limit appears, it is in the check
mode.
Note: Only when the lower limit
≦the upper
limit value can the check mode be started.
It is the same for other unit setting.
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- 1. When the material weight exceeds 10.000kg, there will be an
acoustic warning and the red light will be on.
2. When the material weight is smaller than or equal to 10.000kg and
greater than or equal to 1.000kg, the green warning light will be on.
3. When the material weight is smaller than 1.000kg and greater than
or equal to 20 divisions, the orange warning light will be on.
- 1. When the material weight exceeds 10.000kg, there will be an
acoustic warning and the red light will be on.
2. When the material weight is smaller than or equal to 10.000kg and
greater than or equal to 1.000kg, the green warning light will be on.
3. When the material weight is smaller than 1.000kg and greater than
or equal to 20 divisions, there will be an acoustic warning and the
orange warning light will be on.
- 1. When the material weight exceeds 10.000kg, the red light will be on.
2. When the material weight is smaller than or equal to 10.000kg and greater
than or equal to 1.000kg, there will be an acoustic warning and the green
warning light will be on.
3. When the material weight is smaller than 1.000kg and greater than or
equal to 20 divisions, the orange warning light will be on.
-1. When the material weight exceeds 10.000kg, the red light will be on.
2. When the material weight is smaller than or equal to 10.000kg and greater
than or equal to 1.000kg, the green warning light will be on.
3. When the material weight is smaller than 1.000kg and greater than or
equal to 20 divisions, there will be an acoustic warning and the orange
warning light will be on.
■Pins for connecting the warning lights
Pins for connecting the warning lights
May not be reproduced in any form without written permission
Picture
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Vetek Weighing AB
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JWL Service Manual
The pins for the warning lights are connected
to the 25-male socket.
■ Wire connecting the scale and the warning light
Wire connecting the warning lights
Picture
That is the commonly used 25male and 25
female RS232 connecting wire.
Note: The hollow dots represent the male
connectors and the black dots, female
connectors.
8-4. Two options
May not be reproduced in any form without written permission
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JWL Service Manual
8-4-1 Joint use of PC output and warning light
8.4.1.1 The parameter setting is the same as specified in 8-3-2, 8-3-3
8.4.1.2 Wire connecting the scale to the PC and the warning light
Wire connecting the PC
and the warning light
Picture
Note: The hollow dots represent
the male connectors and the
black dots, female connectors.
8-4-2 Joint use of SH-24 printer output and warning light
8-4-2-1 The parameter setting is the same as specified in 8-3-1 and 8-3-3
8-4-2-2 Wire connecting the scale to the SH-24 printer and the warning light
Wire connecting the
SH-24 printer and the
warning light
Picture
May not be reproduced in any form without written permission
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JWL Service Manual
Note: The hollow dots
represent the male
connectors and the black
dots, female connectors.
8-4-3 Joint use of ZEBRA or other printers and warning light
8-4-3-1 The parameter setting is the same as specified in 8-3-1 and 8-3-3
8-4-3-2 Wire connecting the scale to a ZEBRA or other printers and the warning
light
Wire connecting the
ZEBRA/GODEX(EZ)/BP
545D printer and the
warning light
Picture
8-5. RS-232 output format
Baud Rate: 2400, 4800, 9600
Data Bit: 8
May not be reproduced in any form without written permission
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Vetek Weighing AB
JWL Service Manual
Parity: N (None)
Stop Bit: 1
Code: ASCII
Bit Format:
LSB
MSB
0
1
2
3
4
5
6
7
8
Start Bit
Parity
Stop Bit
Data Format:
g
N
.
W
.
T
.
W
.
G
.
W
.
：
：
：
+/-
g
CR
LF
+/-
g
CR
LF
+/-
g
CR
LF
+/-
k
g
CR
LF
+/-
k
g
CR
LF
+/-
k
g
CR
LF
+/-
l
b
CR
LF
+/-
l
b
CR
LF
+/-
l
b
CR
LF
Weight
Example
N.W.: + 1000.0 g
T.W.: + 500.4 g
G.W.: + 1500.4 g
kg
N
.
W
.
T
.
W
.
G
.
W
.
：
：
：
Weight
Example
N.W.: + 1.0000 kg
T.W.: + 0.4998 kg
G.W.: + 1.4998 kg
lb
N
.
W
.
T
.
W
.
G
.
W
.
：
：
：
Weight
Example
N.W.: + 2.2050 lb
T.W.: + 1.1020 lb
G.W.: + 3.3070 lb
Jin (Taiwan)
N
.
W
.
T
.
W
.
：
：
+/-
G
-
t
l
.
T
CR LF
+/-
G
-
t
l
.
T
CR LF
May not be reproduced in any form without written permission
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Vetek Weighing AB
G
.
W
.
：
JWL Service Manual
+/-
G
-
t
l
.
T
CR LF
+/-
G
-
t
l
.
H CR LF
+/-
G
-
t
l
.
H CR LF
+/-
G
-
t
l
.
H CR LF
Weight
Example
N.W.: + 1.94.8 G-tl.T
T.W.: + 0.13.2 G-tl.T
G.W.: + 2.08.0 G-tl.T
Jin (Hong Kong)
N
.
W
.
T
.
W
.
G
.
W
.
：
：
：
Weight
Example
N.W.: + 1.94.4 G-tl.H
T.W.: + 0.13.2 G-tl.H
G.W.: + 2.07.6 G-tl.H
PCS
t
o
t
a
l
:
CR LF
p
c
s
CR LF
Example
Total:
50pcs
9. Others
May not be reproduced in any form without written permission
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JWL Service Manual
9-1 Options
Example of use of single option
External device
Option
Output format
RS232+RTC+Relay
AP0
→
＋
PC
RS232+RTC+Relay
AP1
→
＋
BP-545D
RS232+RTC+Relay
AP2
＋
→
SH-24
RS232+RTC+Relay
AP3
→
＋
ZEBRA
May not be reproduced in any form without written permission
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Vetek Weighing AB
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JWL Service Manual
RS232+RTC+Relay
AP4
＋
Applicable to the quality control
→ of the factory product quantity
or weight and that of the total
production line.
LED Light Tower
RS232+RTC+Relay
AP5
＋
GODEX(EZ)
Examples of use of options
May not be reproduced in any form without written permission
PAGE
37
Vetek Weighing AB
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JWL Service Manual
Option
External device
or
or
or
AP1
→
or
+
LED Light Tower
PC
/
SH-24
/
ZEBRA
/
EZ
/
BP-545D
10 Circuit Diagram
May not be reproduced in any form without written permission
PAGE
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Vetek Weighing AB
JWL Service Manual
10-1. CPU, peripheral circuit and other circuits
MCB1
+5VD
MCB2
+5VA
BAT
AVS1
13
14
29
G
9
10
11
12
CS
AIN0
ACDD
AIN1
AGND
AD SCLK
13
0.1u,G
1u,T
CP10
AD SDO
12
AD SDI
11
+5VA
AD CS
10
9
CP11
C10
0.1u,G
1u,T
CS1180
MCB8
R3
R52
560R,C
R27
330Ω,C
U11
5
6
7
8
+5VD
VOUT
LV
DSC
V+
C35
4
3
2
1
CAPGND
CAP+
NC
220u,EL
G
1N41 48
7660
1
LED
1
C36
470u,EL
D8
BZ
0.1u,G
A733
Q8
CN7
-5VD
2
1
2
-5VD
2SC1815
F
CP16
Q11
R5320k,C
Q9
2SC1815
1
P 2. 4
P 2. 3
P 2. 2
REFN
14
C9
+5VD
Y3
Y2
Y1
Y0
B
A
+5VD
28
27
26
25
24
SDI
AD RST
100,A,T
30
P 2. 0
23
CN9
ON/OFF
2
1
1M,C
BAT
2
J1
1
4
2
+
1.5k,A
R9
R8
4.7k,C
3
R55
CN3
1k,C
+
1
2
R56
10k,A
R66
AVS7 R64
CP12
47k,C
0.1u,G
C12
Battery
470u,EL
47K,C
D3 1N4148
R22
C2
1N4148
1
2
R20
4
3
C16
CP13
470u,EL
0.1u,G
U15C
U15B
3
OUT
220u,EL
2.2k,C
U15A
IN
C15
R23
2SC1815
10k,C
1
2SB857
330k,C
104P
3 Q5
R65
2
Q6
D4
GND
C11
2/1w,C
+5VD
U3 LM2930
D2 1N4004
R7
3
2
AVS5
AVS6
3
1
1
1
1
0
1
2
EH-Adpator
4 70 u /2 5 v, E L
TP1 TP2 TP3 CAL
1
2
2
2
2
1
Q1
2
D313
U5
1
FUSE
CN2
2
22
21
20
19
18
SDO
REFP
0.1u,G
CP7
EH-BUZZER
20p
SCLK
DGND
15
1M,A,T
MCB7
U9B
15
31
C21
11.059MHz
R28
8
XTAL
16
34
33
32
8
7
6
5
V CC
WP
SCL
SD A
A0
A1
A2
GND
1
2
3
4
RTC
+5VD
CN6
20p
7
DRDY
CP8
36
3
C20
CP6
DVDD
MCLK
0.1u,G
37
22k,C
R25
Y1
0.1u,G
CP5
AVS4
3
CW
1
2
6
0.1u,G
3
2
1
1 0 0 k ,C
R26
5
6
2
1M,C
7
6
5
4
D5
D6
D7
OK
HI
LO
U4
1
Out
Vdd
2
CP14
0.1u,G
C19
470u,EL
C18
+5VD
R51
1k,C
R49
1k,C
R50
1k,C
R17
CN4
4
3
2
1
RS232
R12
R14
1k,C
1K,C
+5VD
R13
R16
Q2
3 Q3
100k,C
3
1k,C 2SC1815
Q4
A733
FB2
3
R19
10k,C
1
2SC1815
+5VD
1k,C
4.7k,C
D1LED-RL
RXD
TXD
220u,EL
R18
4.7k,C
R15
1
U9.16
+5VA
LM2931
2SC1815
U9.8
2
P 3. 2
P 2. 0
74LS139
Q7
3
R24 10k,C
3
B
A
Y3
Y2
Y1
Y0
470P
2
3
2
G
14
13
12
11
10
9
8
2
1
NC
NC
CURLIM COMP
CURSEN
V+
INVc
IN+
Vout
Nref
Vz
VNC
330k,C
1
1
2
3
4
5
6
7
U9A
C13
V ss
R21
U1 LM723
1
4 .7 k .C
U8
HT24C02A
5
R1
3
P2.5
P 2. 1
P3.5/(T1)
4
+5VA
+5VD
DGND
P3
P2.6
R2
100,A,T
2
P2.7
P3.4/(T0)
MCB6
AVS3
LOAD-CELL
2
P3.3 / (not INT1)
4 .7 k .C
4 .7 k .C
+5VD
PSEN
P 2. 0
17
CP18 R31 R30 R29
0.1u,G
ALE / not PROG
P3.2 / (not INT0)
3
MCB5
5
S-
R54
16
P4.1
P3.1 / (TXD)
3
4
S+
CN10
38
35
U6
1
FB1
3 30 k ,C
15
not EA / VPP
AT89C51/52
P4.3
P 4. 0
14
P0.7
U7
P3.0 / (RXD)
GND
13
P0.6
RST
XTAL
4 .7 k .C
12
P3
TXD
P3.2
P1.7
39
20p
R4 1M,C
MCB4
2
M
41
42
40
P 0. 3
P 0. 2
P 0. 0
P 0. 1
44
1
P 4. 2
3
4
5
2
P 1. 0
P 1. 1
P 1. 2
P 1. 3
6
11
P0.5
XTAL
10
RXD
P0.4
P1.6
P 3. 7 / (n o t R D )
9
LCD-DATA
P1.5
P 3. 6 / (n o t W R )
10u,EL
R32
MCB3
C8
4.9152MHz
Y2
1
JWEL
R63 R62 R61
4 .7 k .C
8
20p
2
G
9
8
7
6
5
4
3
2
1
+5VD
4 .7 k .C
7
LCD-CS
AVS2
4 .7 k .C
P 1. 4
43
A D CS
A D RST
CN8
KIN1
KIN2
KIN3
KIN4
KIN5
+5VD
LCD-WR
CN1
E-
R36
10k,C
C7
10u,T
R44 R45 R46
E+
V CC
2
R35
10k,C
C22
R41 R42 R43
10K,C 10K,C 10K,C 10K,C 10K,C 10K,C 10K,C 10K,C10K,C
SCL K
Q10
A733
3
R38 R39 R40
0.1u,G
C1
1
A D SD O
1
R34
10k,C
A D SD I
CP17
KO UT1
KO UT2
KO UT3
KO UT4
+5VD
Title
JWL V1.1
Size
Number
Revision
A2
Date:
File:
May not be reproduced in any form without written permission
PAGE
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E:\jadever\LX资料料\L-SCALE.ddb
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33p
C47
33p
C48
33p
33p
33p
33p
CS9
CS8
C52
33p
C53
33p
24
23
22
21
20
19
18
17
16
33p
C46
C54
33p
C55
33p
C56
33p
C57
33p
C58
33p
C59
33p
33p
S16
S15
S14
S13
S12
S11
S10
S9
S8
33p
C45
S25
S24
S23
S22
S21
S20
S19
S18
S17
33p
C44
33
32
31
30
29
28
27
26
25
C43
CS11
CS15
C51
C49 C50
C42
CS12
CS16
CS20
CS18
CS17
CS19
CS21
CS22
LCD circuit
CS24
10-2.
JWL Service Manual
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
S1
S2
S3
S4
S5
S6
S7
C4
C3
C2
C1
C1
C2
C3
C4
LCD4
33p
33p
33p
CC3
CS7
C66
CS5
C65
33p
C67
C68
33p
C69
33p
C70
33p
33p
CC2
33p
C64
CS6
33p
C63
CS2
33p
C62
CS4
C61
CS1
C60
CS3
U14
1
2
3
4
5
6
7
8
9
10
11
12
13
R57
220Ω,C
R58
4700Ω,C
CP19
0.1u,G
14
15
16
17
18
19
20
21
22
23
24
KIN3
SW1
SW2
1
2
1
2
1
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
CS
RD
WR
DATA
Vss
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
OSC0
OSC1
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
VLCD
VDD
IRQ
BZ
BZ
COM0
COM1
COM2
COM3
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
HT1621B
SW3
2
1
2
1
2
KIN4
SW4
SW5
1
SW6
LED4
2
KIN5
SW7
SW8
1
2
SW9
1
2
1
2
6
5
4
3
2
1
+
+
+
+
+
+
6
5
4
3
2
1
K OU T3
K OU T2
K OU T1
Title
Size
Number
Revision
A3
Date:
File:
1-Sep-2008
E:\jadever\LX
资料料\L-SCALE.ddb
Sheet of
Drawn By:
10 - 3. Applicable mainboard version and software version
Mainboard version: JWL-V1.1 (50-0900-0000)
Software version: JWL1.01
Revision date: Nov. 28, 2008
May not be reproduced in any form without written permission
PAGE
40