Troubleshooting of Pro face GP Series

Attention: GP2500L backlight users cannot replace it themselves and need to contact the supplier.

5.3 Replacement steps (taking CA3-BLU12-01 as an example)

Disconnect all power supplies from GP and unplug the power cord.

Remove the three interface covers and use a Phillips screwdriver to remove the seven screws from the back cover.

Open the back cover from the top (with hinges at the bottom).

Loosen the 3 fixing screws of the circuit board and open the circuit board.

Unplug the backlight power connector (1).

Loosen the backlight fixing screw, slide the backlight to one side and remove it upwards.

Install the new backlight and reverse the operation to restore it.

Safety Warning: Power off before replacement; The backlight tube is fragile and operates at high temperatures; Avoid touching the glass tube.

CF card usage and data backup failure

The GP-2400/2500/2600 series comes standard with a CF card slot, which can be used for screen program transfer, data recording, recipe storage, and more.

6.1 CF card cannot be recognized or read/write errors occur

Card slot cover detection: GP's CF card slot has a physical cover switch, and the CF card cannot be accessed when the cover is opened. The CF card access LED will only light up after the cover is closed. If the cover plate is damaged, turn the DIP switch 4 on the back to ON (force off detection).

Support capacity: It is recommended to use Pro face original cards (64MB/128MB/256MB/512MB). Using non original cards may cause instability.

Initialization: Format in OFFLINE → Initialize Memory → Initialize CF CARD (will delete all data).

6.2 Memory Loader Tool failed to start

Phenomenon: Three repeated beeps when turning on, or no response from CF BOOT.

Reason: MLD * * * *. SYS or IPL.SYS files are missing from the CF card.

Solution: Remake the Memory Loader Tool onto the CF card using GP Pro/PBIII on the PC to ensure file integrity.

6.3 Data Writing Lifespan

The erase life of CF card is about 100000 times (calculated based on writing 500KB per time). Regularly backup CF card data to PC and avoid frequent recording.

Clock error and battery replacement

7.1 Phenomenon

Reset the boot time to 2000/01/01 each time.

Unable to save new time after entering SET UP TIME.

The screen displays' CLOCK SET UP ERROR '.

7.2 Reasons

The internal lithium battery voltage is depleted. This battery is used to maintain SRAM (recipe, alarm history) and real-time clock. Battery life:

Expected lifespan at ambient temperature

≤ 40 ℃ for more than 10 years

≤ 50 ℃ for more than 4.1 years

≤ 60 ℃ for more than 1.5 years

7.3 Handling Methods

Users are strictly prohibited from replacing batteries on their own, as lithium batteries may explode. Please contact your local dealer for replacement. Before replacement, keep the GP continuously powered on for 24-96 hours to perform trickle charging on the battery (rechargeable models only, some older models are disposable batteries). If the time cannot be maintained after charging, it must be sent for repair.

Offline mode and self diagnostic tool

The offline mode of GP is the core entry point for troubleshooting. Entry method:

Touch the top left corner of the screen within 10 seconds after booting up.

In RUN mode, force reset to bring up the menu bar: hold down the bottom right corner, press the top right corner, and finally press the bottom left corner (three finger operation), click "OFFLINE".

8.1 Common self diagnostic items

Select SELF-DIagnoSIS from the OFFLINE main menu to perform the following key tests:

Test item functionality applicable scenarios

LAY PATTERN check LCD display pattern, buzzer, KANJI ROM checksum display abnormality, no buzzing

TOUCH PANEL touches the grid one by one to verify that the touch layer is malfunctioning

SIO CHECK needs to return to the loop line, and the RS-232C/422 transceiver communication is unstable during testing

PRINTER I/F printing ASCII character set printer has no output

CF CARD read-write test CF card error

SOUND I/F playing "Do Re Mi" sound output fault

EXPANSION Serial I/F Test: The barcode gun and serial device are not communicating

8.2 Force Factory Reset

If the screen data is damaged and unable to start, the following methods can be used:

Serial port forced transfer: Select "Transfer Settings" → "Force System Setup" in GP Pro/PBIII on the PC, then connect GP and automatically enter transfer mode after power on.

CF card forced start: Turn DIP switch 1 on the back panel to ON, insert a CF card containing Memory Loader Tool, and automatically restore the system from the CF card after power on.

Common error codes and detailed countermeasures

9.1 SYSTEM ERROR (03:xx)

Appears when there is a data transmission interruption or power fluctuation on the screen. Solution:

Check that the power and signal lines are wired separately and that FG is properly grounded.

Transfer screen data again (using Force System Setup).

If there are other communication errors, solve the communication problem first.

9.2 ILLEGAL ADDRESS IN SCREEN DATA

Tag addresses overlap. For example, the T-tag (trend chart) address conflicts with the system data area address. Address reallocation is required in GP Pro/PBIII to ensure no overlap.