Panasonic JB-3300 Technical Manual page 111

9.5.9 Error messages
When a problem is found, the following message is displayed along with
details of the error:
***kk ERROR KKKK
The details of the error message differ for each device as follows:
(1) Main Board Test
Error Message
Description
ROM CHECKSUM FAILED
The check sum for the BIOS ROM is not correct.
TIMER FAILED
Timer 8253-5 is not counting correctly.
DMAC FAILED
The memory refresh DMA failed.
PPI FAILED
The PPI (8255-5) did not read/write correctly.
PIC FAILED
An unexpected interrupt occurred in the inter-
rupt controller or an interrupt was not
correctly checked.
232C FAILED The UART (8250) control read/write is not
possible.
PRINTER I/F FAILED
Signals to the printer interface were not
returned correctly.
CRTC FAILED
CRTC control read/write is not possible.
(2) Memory Test
ADDRESS xxxxx DATA
XX1 xx2
Memory error occurred in address xxxxx.
xxl = Write Data
XX2 = Read Data