Jadever JWE-3K User manual

JADEVER JCE/JWE Service Manual - V05
As per the right of proprietary intellectual property, may not be reproduced in any form without written permission. 0
CHAPTER 1 GETTING STARTED
1-1Package contents ---------------------------------------------------------------------- 1
1-2Specifications --------------------------------------------------------------------------- 1
1-3Your JCE/JWE scale ------------------------------------------------------------------- 2
1-4Preparation ------------------------------------------------------------------------------ 3
1-5Overview of display & keys ----------------------------------------------------------- 4
CHAPTER 2 SET UP
2-1Models ----------------------------------------------------------------------------------- 8
2-2Calibration------------------------ -------------------------------------------------------- 8
2-3Parameters setup mode ------------------------------------------------------------- 12
2-4Offset value and keypad check----------------------------------------------------- 19
2-5Power supply voltage------------------------------------------------------------------ 20
CHAPTER 3 MAINTENANCE
3-1Replacing main printed circuit board -----------------------------------------------21
3-2Replacing load cell --------------------------------------------------------------------- 22
CHAPTER 4 TROUBLESHOOTING
4-1Preliminary checks ---------------------------------------------------------------------24
4-2Problems and solutions---------------------------------------------------------------- 24
CHAPTER 5 SPARE PARTS & ACCESSORIES
5-1JCE / JWE series----------------------------------------------------------------------- 26
Jul. 2002

JADEVER JCE/JWE Service Manual - V05
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CHAPTER 1 GETTING STARTED
1-1 Package contents
1. Scale body
2. Stainless steel weighing pan
3. Power cord
4. User manual
1-2 Specifications
JCE/JWE-3K JCE/JWE-6K JCE/JWE -15K JCE/JWE -30K
Capacity x resolution, kg & lb
3kg x 0.0001kg
6 lb x 0.00025lb
6kg x 0.0002kg
12 lb x 0.0005 lb
15kg x 0.0005kg
30 lb x 0.001 lb
30kg x 0.001kg
60 lb x 0.002 lb
Countable piece unit weight
(Applicable for JCE only)
0.08g 0.16g 0.4g 0.8g
Internal resolution 1/150,000
Pan size 334 x 245 mm
Sensitivity drift 20 ppm/℃(5 ~ 35℃)
Operating temp. -5℃~ 40℃
Display (JCE Series) LCD, with back-light
Weight: 5 digits; Unit weight: 5 digits; Total count: 5 digits
Display (JWE Series) LCD, with back-light
Weight: 6 digits
Power supply AC 110V/220V (either one), or
Lead-acid rechargeable battery (approx. battery life 60 hours @ 20℃)
Dimension 348(W) x 404(D) x 124(H) mm
Option module RS-232
Net weight Approx. 5.4kg

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1-3 Your JCE/JWE scale (JCE series illustrated here)
Top Bottom
Front Back
Right (viewed from the front) Side
Left (viewed from the front) Side

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1-4 Preparation
Note！: Prior to use
Disassembly the delivery protection screw prior to use.
Check whether power supply select switch is set correctly.
1. Refer to the “bottom view” diagram below for the location of
delivery protection screw.
2. Prior to use, always, counter-clockwise loosen the screw to the end.
3. Prior to delivery, always, clockwise tighten the screw to the end.
4. Refer to the diagram below for the location of
power supply select switch. Check whether its setup meets your need.
Power supply select switch

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1-5 Overview of display & keys
LCD DISPLAY OF JCE
1. Weight-------- Display the total weight
2. Unit weight----Display the unit weight
3. Total count----Display the number of counting
4. HI, LO, OK----Indicators for checking function
5. Sample insufficient----- Indicate when sample is less than 10pcs
or unit weight is smaller than 4/5 of min.
weighing capacity
6. Accumulation-------------Indicate when accumulating
7. TARE---------- “TARE” shown on the display indicating tare weight is set
8. ZERO--------- “ZERO” shown on the display after reset of the
weight to zero
9. Low Batt------ Symbol shown on the display indicating battery
low, recharge the battery is required.
10. Charge-------Light in red when charging, light in green when charge is
completed.

JADEVER JCE/JWE Service Manual - V05
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KEYS OF JCE series
1. ~ ：Numeric keys for input the number.
2. ：Key for enable the checking function, the indicator of HI, LO,
OK will light up accordingly.
3. ：Key for using in accumulating the weight and quantity. (the
indicator of accumulation will light up while accumulating.)
4. ：Key for deleting the accumulation.
5. ：Key for display the weight, the times and the quantities of
accumulation.
6. ：Keyforresetthescale.Thesymbolof
will be shown on the left screen.
7. ：Key for setting the tare weight.
ZERO .

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8. ：Key is for averaging the unit weight of the object. Put the
object on the weighing pan, key in the numbers of quantity
and press key. The left screen will show the weight,
middle screen will show the unit weight and the right
screen will show the quantity of counting.
9. ：Key for cancelling the input.
n Press key to reset to zero when input by using
numeric keys.
n Press key to cancel the value that input by using
and keys.
10. ：For input the unit weight directly by using numeric keys. Key
in the value of unit weight and press to complete
the input.
11. ：Key for two functions
n As a decimal point key.
n To switch the Hi, Lo setting when using the checking function.

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M+
MR
LCD DISPLAY OF JWE
j Indicator LED of charge, light in red indicating charging, and light in green
indicating charge completed.
kLCD display.
lIndicator LED of accumulation.
KEYS OF JWE series
: When weighing use this key for accumulation, when “0” shown
in display use this key to show total accumulation.
: When weighing, use this key to set HI, LOW range.
: For switching the weighing units.
: Press this while tare subject is on the weighing pan.
: Resettozero.
MC
SET
MODE
TARE
<
ZERO
+

JADEVER JCE/JWE Service Manual - V05
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CHAPTER 2 SET UP
2-1 Models
On the A/D PCB, jumpers TPI and TP2 are used to determine the capacity model, as shown
below: (Do know that in different capacity model, load cell used may be different.)
Capacity TP1 TP2
3kg Shorted Shorted
6kg Open-circuited Shorted
15kg Shorted Open-circuited
30kg Open-circuited Open-circuited
2-2 Calibration
Note！:Metrological controls and/or regulations
The regulations and/or metrological controls governing to conduct
calibration vary from country to country.
Please do follow the local metrological controls and/or regulations
imposed by the local authority.
On the A/D PCB, jumper CAL and jumper TC are used to determine the ON/OFF of the
calibration function and TC (temperature compensation), respectively, as shown below:
Jumper Calibration/TC ON Calibration/TC OFF
CAL open Shorted
TC shorted open

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JCE series
u three-point calibration
Follow the procedure below to conduct the three-point calibration.
1. To enter the calibration mode is the first step. (Within the calibration mode, press
to return to the initial step when needed.)
2. Switch off the scale.
3. Press and switch on the scale together, then SET will be displayed.
4. Leave weighing pan empty, and then press again. On0 will be displayed.
JCE starts zero calibration.
5. Then On1 will be displayed after calibration.
6. Put the first calibration weight of 1/3 full capacity onto the weighing pan.
7. Then On2 will be displayed.
8. Put the second calibration weight of 2/3 full capacities onto the weighing pan.
9. Then On3 will be displayed.
10. Put the third calibration weight of full capacity onto the weighing pan.
11. displays and scale beeps.
On0
Set 0 0
On1
On2
On3

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12. Calibration is then completed.
13. To return to the normal weighing mode, press .
u span calibration
1. Turn off the scale and leave the pan empty.
2. Keep SMPL key pressed and turn on the scale, 0will be displayed in UNIT WEIGHT and
TOTAL COUNT displays.
3. Key in the number 11, then press SMPL, to start zero calibration.
CAL 、0 、-H9-
4. When the symbol CAL blinks, zero calibration is completed and scale is now waiting for
span calibration.
CAL 、0 、-H9-
5. Press key 1 to chose the weight desired for calibration (1/3, 2/3, or full capacity ).
6. Put on the weight desired for calibration and press ．, then span calibration will be
executed.
7. If span calibration is completed, the display will show PASS. Remove the calibration
weight from the pan, then press SMPL back to the setting mode.
0 0

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JWE series
u three-point calibration
Follow the procedure below to conduct the three-point calibration.
1. Turn off the scale.
2. Keep key pressed and turn on the scale. Display will show
3. Press key, then the display will show . JWE starts zero calibration.
4. When the display shows , the zero calibration is done. Put the first
calibration weight of 1/3 full capacity onto the weighing pan.
5. Put the second calibration weight of 2/3 full capacity onto the weighing pan when the
displayshows .
6. Put the third calibration weight of full capacity onto the weighing pan when the display
shows .
7. When the display shows , empty the weight pan. Press zero key to return to
the normal weighing mode.
u span calibration
1. Turn off scale and leave the pan empty.
2. Keep pressing key and turn on the scale and the display will show .
3. Press key and the display shows .
4. When zero calibration is completed, the scale is waiting for the span calibration, the
display indicates the weight you should put on the pan. You can chose the weight by
pressing key within 3 seconds.
5. When the display shows PASS, empty the pan. Press zero key to return to the normal
weighing mode.
linter
On0
On1
On2
On3
CAL
zero CAL
pass
ZERO
+
TARE
<
MC
SET
M+
MR
MODE

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2-3 Parameters setup mode
Parameters setup mode is provided to set up functions for JCE series including backlight,
capacity-resolution, digital filtering, auto power-off, zero-band, baud rate, HI-OK-LO setup,
memory on/off, printing mode, external printer/device, and unit. For JWE series it includes
capacity-resolution, operating unit, power-on operating unit, digital filtering, auto power-off,
backlight, zero band, baud rate, printing mode, external printer/device, weight-checking
memorizing, and weight-checking beep mode.
JCE series
Follow the steps below to enter the parameters setup mode.
1. Turn on the scale while keeping ZERO key pressed.
2. “SEt”, “SCALE”, “FunC” will be shown respectively in three LCD display for indicating
parameter setup mode. Using numeric keys (0 to 9) to select the function intended to set
up and then to set parameter value associated with. Details shown below. (After
completing the setup, press ZERO key for storing the setup values and to return to the
normal weighing mode.)
Ø Backlight
Press 0key to enter the Backlight setup. The display will show:
, ,
Press 0key to set up backlight function, as following:
ON: Backlight function is turned on
OFF: Backlight function is turned off
ONOFF: Backlight function is automatic turned on when weight loading is over 9e.
Ø Capacity-resolution setup
Press 1key to enter the capacity-resolution setup. The display will show:

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, ,
Press 1key to select the desired capacity-resolution.
Ø Digital filtering
Press 2key to enter the digital filter setup. The display will show:
Press 2key to set up backlight function, as following:
Level 1: Weighing response is faster, while effect to filter vibration is less
Level 2: Weighing response is slower, while effect to filter vibration is better
Ø Auto power-off
Press 3key to enter the auto power-off setup. The display will show:
, ,
Press 3key to set up auto power-off function, as following:
Off: Off the auto power-off function
5/10/30/60: Auto power-off function is actuated 5/10/30/60 minutes after, respectively,
there is no weighing loading or no key pressed.
Ø Zero band
Press 4key to enter the auto power-off setup. The display will show:
, ,
Press 4key to set up zero-band function, as following:
d0/d1/d2/d3/d4/d5: Zero-band function is to define the weight range within which the scale
will remain zero indication whenever there is disturbance. Weight range
is expressed in terms of number of display division, both in positive and
negative direction.

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Ø Baud rate
Press 5key to enter the baud rate setup. The display will show:
,
Press 5key to select the desired baud rate.
Ø HI-OK-LO setup
Press 7key to enter the HI-OK-LO setup. The display will show:
,,
Press 7key to set up HI-OK-LO function, as following:
Un: Beep sounds when quantities are over the setting of Hi.
ln: Beep sounds when quantities are within the setting of Hi and Lo, including the Hi
and Lo limits.
no: Beep sounds when quantities are out of Hi and Lo setting.
Lo: Beep sounds when quantities are below the setting of Lo.
nbeep: No beep alert
Ø HI/LO memory on/off
Press 8key to enter the HI/LO memory on/off setup. The display will show:
, ,
Press 8key to set up HI/LO memory on/off function, as following:
M. on: Turn on the HI/LO memory. That is, to memorize the HI/LO set values.
M. off: Turn off the HI/LO memory. That is, not to memorize the HI/LO set values.
Ø Printing mode
Press 9key to enter the printing mode setup. The display will show:

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,,
Press 9 key to set up printing mode function, as following:
Pr: Data will be sent to printer only when key is pressed.
Co: Data will be sent to printer continuously.
St: Data will be sent to printer when stable indicated.
Ø External printer/device
Press CK key to enter the external printer/device setup mode. The display will show:
、 、
Press CK key to set up external printer/device, as following:
PC: Personal computer
SH: SH-24 printer
TDP: TDP-643/BP-343D printer
EZ: EZ-2 printer
Ø Weighing unit
This function is to set up the weighing unit of the scale. Follow the steps below to select the
weighing unit.
1. Turn on the scale while keeping SMPL key pressed. The display will show
、0 、0
2. Press 1 1 3 2 keys successively, then press SMPL key to enter unit setup
mode. Display will show SEtU 、SET 、-9-
3. Press 1key to select intended kg or lb unit.
4. Press SMPL key, followed by pressing ZERO key, to back to the normal weighing mode.

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JWE series
Follow the steps below to enter the parameters setup mode.
1. Turn off the scale.
2. Keep MC/SET pressed and turn on the scale. Display will show CAL
3. Now, you can press MC/SET to enter the power-on setup mode.
4. Press MC/SET again to go to the next setup when current setup is completed.
5. Press ZERO at any stage to go to normal weighing mode
Ø Capacity-resolution setup
1. Press MC/SET right after display shows CAL. Display will show the current
capacity-resolution setup.
2. Press M+/MR repeatedly until the desired capacity-resolution is displayed. (The
available capacity-resolution is model dependent.)
Ø Operating units selection
This function is provided for you to enable those weighing units you want to have in normal
operation. Those disabled units will not be shown when you press MODE in normal
operation.
1. Press MC/SET until display shows on kg.
2. Press M+/MR to view the status of the available units. They are:
Kg / g / lb / lb-oz / 斤(TAEL, China) / 港斤 (TAEL, Hong Kong) / 台斤 (TAEL,
Taiwan) / pcs (piece counting) / % (percentage)
3. Press MODE to enable (ON) or to disable (OFF) each of it.
Ø Power-on operation unit
You can choose one of the weighing units mentioned in the previous section as the power-on
weighing unit. The selected unit will be the default unit each time when the scale is powered
on (other enabled units can be displayed in revolving order by pressing MODE.)
1. Press MC/SET until display shows Init = g.
2. Press M+/MR to choose the unit you want to set as power-on operation unit.
Ø Digital filtering
This function is provided for weighing vibrating objects, or to prevent the scale from vibration
that may affect stability of the scale.

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1. Press MC/SET until display shows FiL. X. Fil. 1
2. Press M+/MR to select the appropriate level for your application. (Each level of
setting is a trade-off between reacting speed and the effect to filter vibration. Larger
number means slower reacting speed and better effect to filter vibration.)
Ø Auto power-off
When auto power-off is enabled, scale will be automatically switched off after there has been
no load on the pan (and, scale is stable at zero) for the time duration set.
1. Press MC/SET until display shows Aut.XX. (“XX” is the current setup of auto power
off time.)
2. Press M+/MR to select auto power-off time as one of 5, 10, 30, 60 minutes or no
(auto power-off is disabled.)
Ø Backlight
Backlight is provided for having better visibility when the scale is used in dark environment.
1. Press MC/SET until display shows Iit.XXX. Iit.Aut
2. Press M+/MR to select backlight mode as Auto, OFF, or On.
Aut : Backlight will be ON whenever there is load (greater than 9 x display
resolution) on the pan and OFF when there is no load.
On : Backlight will be always ON after scale is powered on.
OFF: Backlight will be always OFF after scale is powered on.
Ø Zero band
Zero-band function is used to define the weight range within which the scale will remain zero
indication whenever there is disturbance. Weight range is expressed in terms of number of
display divisions, both for positive and negative directions.
1. Press MC/SET until display shows ZEro.X. ZEro.1
2. Press M+/MR to choose the range. Six options: 0d (d0), 1d (d1), 2d (d2), 3d (d3), 4d
(d4), and 5d (d5) are available.
Ø Baud rate
Baud rate function is used to set the optional RS-232 interface data transmission rate.
1. Press MC/SET until display shows bAu.96. bAu.96
2. Press M+/MR to choose the transmission rate. Either 2400, 4800, or 9600.+

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Ø Printing mode
Printing mode is used to set the method of printing when connected with a printer.
1. Press MC/SET until display shows Prt.Pr. Prt.Pr
2. Press M+/MR to set the printing method, as following:
Pr: Data will be sent to printer only when key is pressed.
Co: Data will be sent to printer continuously.
St: Data will be sent to printer when stable indicated.
Ø External printer/device
External printer/device function is used to set the type of external connected device.
1. Press MC/SET until display shows Peri. Wait for few seconds, display will show
PC
2. Press M+/MR to set the external printer/device, as following:
PC: Personal computer
SH: SH-24 printer
TDP: TDP-643/BP-343D printer
EZ: EZ-2 printer
Ø Weight-checking memorizing
Weight-checking memorizing function is to determine whether or not to memorize the check
weight.
1. Press MC/SET until display shows M OFF. M OFF
2. Press M+/MR to set whether or not to enable weight-checking memorizing. To select
either ON or OFF.
Ø Weight-checking beep mode
This is to set, in weight-checking mode, the condition at which buzzer is actuated to beep.
1. Press MC/SET until display shows bEEP.Un. bEEP.Un
2. Press M+/MR to set the condition, as following:
Un: Buzzer will be actuated when measured weight is above the set high limit.
ln: Buzzer will be actuated when measured weight is in-between the upper and lower
set limits (including the upper and lower limits).
no: Buzzer will be actuated when measured weight is outside the upper and lower
limits.
Lo: Buzzer will be actuated when measured weight is below the set low limit.

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2-4 Offset value and keypad check
Offset value mode is provided for maintenance people to observe the internal offset value
when it is needed. In the offset value mode, to press respectively each key on the keypad
can also perform check of the key’s function. Follow the steps below to enter the offset value
mode.
JCE SERIES
1. Switch off the scale.
2. Keep ZERO pressed and switch on the scale, display will show SEt SCALE Func.
Then, press ZERO again, offset value will be shown in WEIGHT and UNIT WEIGHT
displays, and KEy18 will be shown in TOTAL COUNT display. With weighing pan on the
scale, the correct offset values should be under 800000.
3. To press respectively each key on the keypad can perform check of the key’s function.
The correct display in TOTAL COUNT should be the following if the key pressed is normal:
Key pressed Correct display Key pressed Correct display Key pressed Correct display
1 Key 1 7 Key 7 M+ Key 12
2 Key 2 8 Key 8 UWS Key 13
3 Key 3 9 Key 9 MC Key 14
4 Key 4 0 Key 0 CE Key 15
5 Key 5 CK Key 10 MR Key 16
6 Key 6 . (decimal pt.) Key 11 SMPL Key 17
4. After all required has been done, press ZERO twice to initiate power-on self-test, and the
scale will be ready for use.
JWE SERIES
1. Switch off the scale.
2. Keep pressing
M+
MR
key and switch on the scale. The display will show POS 2.