No.
Definition
Symptom Possible Cause
857 C
USB I/F Error
USB interface error detected. • Defective controller
900 B
Electrical total counter error
The electrical total counter does not
work properly.
• NVRAM on the GDI controller board
defective
901 B
Mechanical total counter
The mechanical total counter does
not work properly.
• Mechanical total counter defective
• BICU defective
• Disconnected mechanical total counter
903 B
Engine total counter error
The checksum of the total counter is
not correct.
• NVRAM on the BICU defective
920 C
Printer error
A fatal error is detected in the
printer application program
• Printer application program defective
• Hardware configuration incorrect
(including memory shortage)
921 C
Printer font error
Necessary font files are not found. • Font file not installed
928 B
Memory error
The machine detects a discrepancy
in the write/read data during its
write/read test (done at power
off/on and at recovery from low
power or night/off mode).
• Memory defective
• BICU defective
• Poor connection between BICU and
memory
954 B
Printer application program error
The printer status does not become
ready when the printer application
program is necessary for image
processing.
• Application program defective
Service Call Conditions
189
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