Panasonic SA-PM53E Service Manual page 20

8.1.3. EEPROM Checksum (ROM correction)
Purpose : To check for micro-processor firmware version & EEPROM check (ROM correction).
Below is the procedures for this mode.
Step 1: Enter into Doctor mode (For more information refer to section 8.1 on key operation to enter into
this mode).
Step 2: Check for firmware version & EEPROM checksum.
- When entering into DOCTOR MODE the firmware version & checksum of
EEPROM (if applicable) will appear on FL display. Below is information
on the EEPROM IC (Rom correction) under 3 examples:
1. When EEPROM IC is detected and there is no ROM correction:
2. When EEPROM IC is detected and has ROM correction:
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