F020 - Main Or Expanded Memory Error; F030 - General Failure; F040 - Communication Error; F070 - Flash Rom Error - Kyocera FS-1900 Service Manual

(21) F020 - Main or expanded memory error

Meaning
Checksum failed with
main memory (RAM)
on the main board or
expanded memory
(DIMM).

(22) F030 - General failure

Meaning
Miscellaneous failure
with the main board,
other than F0, F010
and F020, above.

(23) F040 - Communication error

Meaning
Communication
between the engine
board and the main
board is failed.

(24) F070 - Flash ROM error

Meaning
CPU U201 of engine
board could not write
data failed to flash
ROM U202. Write
sequence to flash
ROM is not
successful.
Verify error. (Written
data does not match
the original data.)
FS-1900
Suggested causes
Defective system main memory (RAM) on the
main board (KP-948).
Defective main board (KP-948).
Defective expanding memory (DIMM) on the
main board (KP-948).
Suggested causes
Defective main board (KP-948).
Suggested causes
Defective gate array (U02) on the main board.
Connector failure between the engine board
(KP-864) and main board (KP-948).
Overrun in the engine system, deactivating the
program flash ROM (U202) on the engine
board (KP-864).
Suggested causes
Defective CPU U201 or gate array U204 or
flash ROM U202 on the engine board (KP-
864).
6-22
Corrective action
Replace main board (KP-
948).
R e p l a c e e x p a n d i n g
memory (DIMM).
Corrective action
Replace main board (KP-
948).
Corrective action
Replace the main board
(KP-948). See page 5-24.
V e r i f y c o n n e c t o r
connections.
Replace the engine board
(KP-864). See page 5-22.
Corrective action
Replace engine board
(KP-864).