2-12
DNW-A220
DNW-A220P
ERROR-43 DPR-87 BOARD ERROR 4 SDRAM CHECK
(DPR-87 BOARD 4)
Description :
The abnormal operation of IC (SDRAM) on DPR-87 board was detected.
Detecting condition :
When the diagnostic of each IC at turning on the power or shifting the operation
mode is in abnormal state.
Sub error message :
SX ENC
SX MEP
SX DEC
For diagnostic of DPR-87 board, refer to section 1-8 (menu number:C24) of maintenance manual part 2
volume 1.
Protecting operation :
Displays only this error.
ERROR-92 INTERNAL INTERFACE ERROR 1
(INTERNAL I/F 1)
Description:
Abnormality was detected in the communication between SYS1 CPU (IC106 on
SY-259/259A board) and other CPU/MPU.
Sub error messages and Detecting conditions:
SY2
: When the SYS2 CPU (IC108 on SY-260 board) initialization at turn on
the power is in abnormal state.
KY
:
When the communication with KY-400/406 board’s MPU (IC105) is in
abnormal state.
DP
:
When the communication with DP-264/264A board’s MPU (IC101) is in
abnormal state.
Possible causes:
SY2
:
.
DIP switch (S201 on SY-260 board) setting defect
.
Common RAM (IC400 on SY-259/259A board) or I/F bus circuit
(IC402 through IC404) trouble
.
System control system (IC451 through IC455 on SY-260 board)
trouble
KY
:
.
Cable (between CN-1535/1535A board and KY-400/406 board)
connection defect or disconnection
.
Cable (between MB-757 board and CN-1535/1535A board) connec-
tion defect or disconnection
.
Interface circuit (IC206 on SY-259/259A board) trouble
.
Line receiver/transceiver (IC101 on KY-400/406 board) trouble
.
KY-400/406 board’s MPU (IC105) trouble
DP
:
.
Cable (between MB-757 board and KY-400/406 board) connection
defect or disconnection
.
MPU control interface circuit (IC209, IC307 and IC308 on SY-259/
259A board) trouble
.
KY-400/406 board’s MPU (IC8) trouble
Protecting operations:
When the sub error message is “
SY2
”, enters the protection mode.
When it is except above, displays only this error.
2-2. Details of Error Messages
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