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Troubleshooting the printer
October 1997 4-7
Table 4-3
Common error messages
740, 741, 742 PROGRAM PROMS or
CONTROLLER
PRINTED CIRCUIT
BOARD
• Turn off the printer.
• Disconnect all cables except power.
• Turn on printer.
• If error doesn’t clear, call for service
• If error code disappears, the com-
puter, cabling or software could be
causing the problem.
748, 749, 74A,
74B, 74C,74D
PHM Failure
750-756 Unexpected write from
DSP
757 DSP Set Verify Failure
760-773, 76E,
76F, 76A, 76B,
76C, 76D
CONTROLLER
PRINTED CIRCUIT
BOARD
800-857 General CONTROL-
LER PRINTED CIR-
CUIT BOARD
900-930, 090B,
091B, 093B, 094B
DSP BLOCK, CHECK-
SUM
SERVICE REQ
XXX
An error occurred. The
message includes a
4-digit error code.
Turn the printer
Off
and then back
On
.
If the message persists, service is
required.
Error Description Possible solution
POWER INDICA-
TOR LED not illu-
minated
LCD POWER INDICA-
TOR not illuminated, or
printer does not oper-
ate.
• Verify the printer is plugged in, turned
on and that the power cord and wall
outlet are good.
• Call for service.
No Printed Image
on TRANSPAR-
ENCY/RECEIVER
The printer completes
the print cycle, but there
is not image on the
RECEIVER
•Press the print button on the printer to
make a Test Print
• If the Test Print is blank, call for ser-
vice.
• If Test Print is not blank, reload soft-
ware and check cabling.