JVC KD-R491 Schematic Diagrams page 41

4.4 Service Information Clear Mode
In during power off, pressing and holding [RETURN] key and [
4.4.1 Default status immediately after the mode activation
It shall be same as normal activation.
4.4.2 Mode content
After entering this mode, Syscon shall clear the information stored for service and output the result to the display.
CD will be ejected upon process end.
Cleared information changes will take place only after reset.
Display
Data Clear in
I N I
Progress
Data Clear OK
D A T
Data Clear NG
D A T
Display Blinks (250ms interval)
The following table shows the data that is cleared.
Information to Clear
CD mecha information
Service information
DC error information
Tuner information
Tagging information
Display content
T I A L I Z E
A C L R : O
A C L R : N
CD mecha log display
CD load error information display
CD eject error information display
CD time code error count information display (count skip)
CD time code error count information display (no count update)
CD EJECT number of times display
Forced Power OFF information display
DC error 1 display (wrong connection & other detection information in detecting duration) E2PROM
DC error 2 display (capacitor leakage detection number information)
Tuner Area Setting
Preset Frequency
Preset PI code
Token data memory index
(No.MA665<Rev.001>)22/33
SRC] key, then power on the +B power supply.
Data Clearing in Progress
Data cleared successfully
K
Data cleared with error
G
CD is ejected out after the data is being cleared.
Details
Details
Storage area
E2PROM
E2PROM
E2PROM
E2PROM
E2PROM
E2PROM
E2PROM
E2PROM
E2PROM
E2PROM
E2PROM
E2PROM