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CHAPTER 2
b. Controller serviceman call
6F-63 S E K V I C E
6F-68 S E K V I C E
6F-69 S E K V I C E
6F-75 S E R V I C E
6F-77 I SERVICE
6F 7A SERVICE
6F-90
SEKVICt?
6F-9 I 1 SERVICE
I
6F-92 ' SERVICE
6F-93
SERVICE
i
2 - 52
Description
Internal ROM checksum err"r
i The
contents of the ROM on the video
1
conlroller are incorrect.
Internal RAM error
Data cannot be correctly read from or
written to the DRAM located on the
video controller.
NVRAM errOr
correctly read from or
Data
cannot he
1 vcitten
to the
NVRAM (EEPROM) located corrected, replare the
~
on
the video controller.
Extended interface err"r
The r'qonsr from
the extended interface
~ PCH is not input to the video controller
~
PCB within the prescribed time.
I
i
/VSREQ signal errOr
If the /PRNT signal is false. the /VSREQ
signal is output from the DC controller
to
the video controller PCB.
No /VSYNC signal
The /VSYNC signal is not oulput within
the prescribed time after the video
controller PCB receives the /VSWQ
signal from the DC controller PCB.
Gate array internal SF4AM error
Data
rannot be correctly read from or
written to the SRAM in the gate array
IGAl).
IOP
ROM error
internal
The contents of the IOP ROM are
incorrect.
IOP internal RAM error
'
Data cannot be correctly read from or
1 written to
lhe IOP RAM.
I
Communication error between CPU and
'
IOP
The CPU cannot communicate with the
Interrupt err"r between CPU and IOP
The
IOP does not generate a correct
interrupt to the CPU.
MfXlsUre
I
Turn the power OFF and ON
again. II" the err"r persists,
replace the video controller
PCB.
Turn the power OFF and ON
again. If the error persists,
replace the video controller
PCB.
Turn the power OFF and ON
again. If the error cannot be
EEPROM (IC 16).
Turn
the power OFF and ON
a@~.
If the error cannot be
corrected, replace the
extended interface PCB or
video controller PCB.
Turn the power OFF and ON
again. If the error cannot be
corrected, replace the DC
controller PCB or video
controller PCB.
Turn the pow& OFF and
ON again. If the err"r
persists, replace the video
controller PCB.
turn the power
and
OFF
again. If the error cannot be
corrected, replace the video
controller PCB.
Turn the power OFF and
ON agaln. If the error
cannot be corrected, replace
the video controller PCB.
Turn the power OFF and On
again. If the error cannot
be corrected, replace the
video controller PCB.
Turn the power OFF and On
again. If the err"r cannot be
corrected, replace the video
controller PCB.
turn the power
and on
OFF
again. If the errOr cannot
be corrected, replace the
video controller PCB.
on
_~
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