Table of Contents
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Ⅰ. Phenomena of trouble
1) Trouble of part
The trouble phenomena are as following:
a) Buzzer-----buzzer doesn't make sound, or sometimes make sound and sometimes doesn't make sound.
b) LCD-----The display is faultily.
c) Backlight-----The backlight doesn't lighten, or sometimes it lighten and sometimes doesn't lighten:
d) Key -----The key don't work.
2) Trouble of load cell
The trouble phenomena are as following:
a) The display data is drifting.
b) The display data doesn't change, or the internal resolution value is not in the natural range.
c) The internal resolution data drift badly.
d) The initial resolution is drifting.
3) Trouble of power supply
The phenomenon is as following:
The scale doesn't work or the "low voltage" symbol comes out after turning on.
4) Trouble of the PCB
The phenomena are as following:
a) Trouble of display board-----the display is abnormal, or shows nothing.
b) Trouble of main board
There is nothing in the display when turn on the scale.
The weighing is unstable.
The internal resolution is out of the normal range.
c) Trouble of RS-232 board-----The scale doesn't transmit any data.
Service Manual for EC-II counting scale
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Summary of Contents for CAS Scale EC-II
- Page 1 Service Manual for EC-II counting scale Ⅰ. Phenomena of trouble 1) Trouble of part The trouble phenomena are as following: a) Buzzer-----buzzer doesn’t make sound, or sometimes make sound and sometimes doesn’t make sound. b) LCD-----The display is faultily. c) Backlight-----The backlight doesn’t lighten, or sometimes it lighten and sometimes doesn’t lighten: d) Key -----The key don’t work.
- Page 2 Ⅱ. To solve the trouble 1．The scale can not be powered on L7808 is damaged, Check if the AC The output voltage Connect the scale Scale can not replace it. of L7808 is 8V. with AC power. light is on. be powered on.
- Page 3 2. No display after turning on: Check if the CPU display Replace Replace the display Displays well when display is fixed correctly. faulty. cores wire. board. power on. after turn on. display Take off the CPU, Check main The 16 cores wire work normally.
- Page 4 3. Press the keypad the scale can not work: short-circuit The problem can be The scale can not work membrane keypad. solved. when pressing the keys. keypad is damaged. Change the 16 cores wire. The problem can be The 16 cores wire solved.
- Page 5 4. Weighing is inaccurate or instable: The voltage value is Weighing is inaccurate The battery voltage is Recharge or replace the Check if the working normal. less than 5.4V battery. or instable. environment is stable. Change to a stable There are something To use the scale when Move away...
- Page 6 5. The display is incomplete or exceptional: display Change The problem can be The 9 cors wire is incomplete cors wire. solved. damaged. exceptional Change the display board. The problem can be The problem is in Check if all the pins Reweld them.
- Page 7 6．RS232 don’t transmit any data Check the voltage Check if the setting Check the voltage RS232 don’t Replace Check of transmit method of the 7 pins of of the input pin of transmit 3-cores cable. 3-cores cable is or baud rate is the RS232 socket U1ADM data.
- Page 8 III. Calibration procedure 1. Switch on. Press “83419” to enter into Calibration mode during self-checking. If the display shows as below, it means the scale hasn’t be calibrated or data lost. Then press “ENTER” key to enter into calibration value setting. WEIGHT UNIT WEIGHT COUNT...
- Page 9 Press SET key to check the current internal resolution. Display shows as below: WEIGHT UNIT WEIGHT COUNT 200358 ▼ ▼ ▼ ▼ NEGATIVE Local Remote COUNT Current Internal resolution Put on more weight. WEIGHT UNIT WEIGHT COUNT 142230 342588 ▼ ▼ ▼...
- Page 10 3.1.2 Press “MOVE” key to change the value. (yes, no) 3.1.3 Press “ENTER” key to confirm and enter into next setting. 3.2 Choose unit value(USA version): 3.2.1 The display shows: WEIGHT UNIT WEIGHT COUNT Unit 200358 ▼ ▼ ▼ ▼ NEGATIVE Local Remote COUNT 3.2.2 Press the “MOVE”...
- Page 11 3.4 Choose accuracy value: 3.4.1 The display shows: WEIGHT UNIT WEIGHT COUNT 200358 ▼ ▼ ▼ ▼ NEGATIVE Local Remote COUNT 3.4.2 Press the “MOVE” key to change the value. (1,2,5) 3.4.3 Press the “ENTER” key to confirm and enter into next step (Choose capacity). 3.5 Choose capacity: 3.5.1 The display shows: WEIGHT...
- Page 12 3.6 Enter zero point: 3.6.1 The display shows: WEIGHT UNIT WEIGHT COUNT HHHHH CAP0 200358 ▼ ▼ ▼ ▼ NEGATIVE Local Remote COUNT 3.6.2 Use the numerical keys to key in the zero point( 0 ). 3.6.3 Press the “ENTER” key to confirm and enter into next step (Enter the first calibration value ). 3.7 Enter the first calibration value: 3.7.1 The display shows: WEIGHT...
- Page 13 3.8 Enter the second calibration value: 3.8.1 The display shows: WEIGHT UNIT WEIGHT COUNT HHHHH CAP2 200358 ▼ ▼ ▼ ▼ NEGATIVE Local Remote COUNT 3.8.2 Use the numerical keys to key in the second value for calibration. 3.8.3 Press the “ENTER” key to confirm and enter into next step (Enter the third calibration value ). Note: If only one weight value for calibration is needed, Press “SET”...
- Page 14 4. Calibration Mode: Press “SMPL” key to do the calibration. The unit weight window shows”00”, and the value”HHHHHH” in weight window blinks. Several seconds later,the unit weight window shows “ 01 “,and the weight window shows the weight value (the first calibration value). Put on the weight refer to the display.
- Page 15 Simple calibration without weight 1. Turn on the scale, and key in “000419” during counting down (self-check) to zero to enter into Simple Calibration mode. The displays will indicate as below. Press MOVE key to choose the taget platform(local or remote). WEIGHT UNIT WEIGHT COUNT...
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