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3 Service Navigation
3.1. Service Information
This service manual contains technical information which will allow service personnel’s to understand and service this model.
Please place orders using the parts list and not the drawing reference numbers.
If the circuit is changed or modified, this information will be followed by supplement service manual to be filed with original service
manual.
3.1.1. Firmware update
• Software Update through USB
Steps:
1. Power On Set.
2. Go to USB selector.
3. Plug In USB (containing FW_IMAGE.BIN & FWUPDATE (disc image file)) or PM250.FRM file.
4. Display will show 'READING' (blink) → UPD 0% to 100%.
5. After Software Update complete, display will be show [SUCCESS].
6. Plug out USB.
7. AC out set.
8. Software Update Process Finish.
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