Setting For Factory Mode Permission / Prohibition [Fay /Fan]; Backup Function For Adjustment Value For The Main Unit [Faj /Uaj /Cbu /Bcp] - Pioneer PDP-4271HD Service Manual

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9.3.15 SETTING FOR FACTORY MODE PERMISSION / PROHIBITION [FAY /FAN]

The commands FAY/FAN are for prohibiting/permitting panel-adjustment commands.
Command
Effective Operation
Format
Modes
Normal operation mode
[FAY]
while the power is on
[FAN] During FAY
9.3.16 BACKUP FUNCTION FOR ADJUSTMENT VALUE FOR THE MAIN UNIT [FAJ /UAJ /CBU /
BCP]
When the DIGITAL Assy is to be replaced, adjustment values can be copied from the backup EEPROM to the EEPROM
of the Assy for service.
Command
Effective
Format
Operation Modes
[FAJ]
[UAJ]
During FAY
[CBU]
[BCP]
5
6
Operation
Control
Adjust command is valid.
Adjust command is invalid.
Operation
Control
To make the flag setting that
Writing 00 to the 4 k byte ROM and
indicating that adjustment of the
copying to the 2 k byte ROM
panel unit has been completed
To make the flag setting that
Writing F0 to the 4 k byte ROM
indicating that adjustment of the
main unit has not been completed
To make the flag setting that
Writing F0 to the 2 k byte ROM
indicating that backup data
have not been copied
To copy Digital backup data
Copying backup data
to EEPROM
PDP-4271HD
6
7
Remarks
Mask indications will be forcibly turned off.
This takes at least 350 ms.
The backup ROM is
initialized.
7
8
A
B
C
Remarks
D
E
F
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