Panasonic SA-AK750GCP, Service Manual

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Item FL Display Key Operation
Mode Name Description Front Key
Tape Eject Test To check on the tape
eject function (For deck
1/2)
In doctor mode:
1.
Press [0] button on remote control.
FL Display Test To check the FL
segments display (All
segments will light up and
LED will blink at 0.5
second interval)
In doctor mode:
1.
Press [DIMMER] button on remote control.
Cold Start To activate cold start
upon next AC power up. In doctor mode:
1.
Press [4] button on remote control.
To exit, press [ENTER] button on remote
control or
button on main
unit.
Clock Setting
Check
To indicate that a clock
time was set properly In doctor mode:
1.
Press [MUTING] button on remote control.
9.2.1. EEPROM Checksum (ROM Correction)
Purpose: To check for microprocessor firmware version and EEPROM checksum (ROM correction).
Below are the procedures for this mode.
Step 1: Enter into Doctor mode (for more information, refer to section 9.2 on the key operation to enter into this mode.
Step 2: (By pressing STOP button on main unit followed by “4” and “7” on remote control) Check for firmware version and EEPROM
checksum.
· When entering into DOCTOR MODE, the firmware version and checksum data of EEPROM (if applicable) will appear on FL
display. Below is the information on the EEPROM IC (ROM correction) under 3 possible situations:
1. In the case that the correction point existence data is other than 0 (ie. correction file exists), EEPROM checksum display for
the microprocessor shall be made after calculating checksum by summing up the content of data area from EEPROM IC.
2. In the case when no EEPROM IC is installed. It is display as below (no display of checksum data)
3. In cases that the filename is different even though a EEPROM is installed, or no correction file exists, [NG] shall be displayed
(the correction point existence data is set to 0 at this condition).
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SA-AK750GCP