Lexmark X734DE - Page 75

Diagnostic information 2-37
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920.20
POST Error
Incompatible transfer module. • POR the printer.
• If the error message persists, go to “920.15,
920.20—POST—Bad transfer module
NVRAM data error service check” on
page 2-118.
920.21
POST Error
+24 V power supply failure. • POR the printer.
• If the error message persists, replace the low-
voltage power supply. See “Low-voltage
power supply (LVPS) removal” on
page 4-124.
920.22
POST Error
Fuser bubble sensor is not connected. If the error message persists, go to “Bubble
sensor service check” on page 2-141.
920.23
POST Error
Duplex motor is not connected. • POR the printer.
• If the error message persists, go to “920.23—
POST error service check” on page 2-126.
920.25
POST Error
Bad temperature and humidity sensor. • POR the printer.
• If the problem persists, go to “920.03, 920.25—
Transfer Module Missing error service
check” on page 2-107.
920.26
POST Error
Top access cover sensor not
connected.
Go to “920.26—POST service check” on
page 2-127.
920.27
POST Error
Option board ID unknown. Go to “920.27, 920.28, 920.29—POST (power on
self test) service check” on page 2-128.
920.28
POST Error
Option type unknown. Go to “920.27, 920.28, 920.29—POST (power on
self test) service check” on page 2-128.
920.29
POST Error
Option product ID unknown. Go to “920.27, 920.28, 920.29—POST (power on
self test) service check” on page 2-128.
920.30
POST Error
Option sensor disconnected. Use the following list to determine which service
check to use:
•Tray 2—Go to “242.02—Paper Jam error
service check” on page 2-72.
•Tray 3—Go to “243.02—Paper Jam service
check” on page 2-78.
•Tray 4—Go to “244.02—Paper Jam service
check” on page 2-84.
•Tray 5—Go to “245.02—Paper Jam service
check” on page 2-90.
920.31
POST Error
Option hardware error (generic) Contact your next level of support.
925.01
Fan Error
Fan has stalled. • POR the printer.
• If the error message persists, go to “925.01,
925.03, 925.05—Fan error service check” on
page 2-129.
925.02
Blower Error
Blower has stalled. • POR the printer.
• If the error message persists, go to “925.02,
925.04, 925.06—Blower error service check”
on page 2-130.
925.03
Fan Error
Fan has stalled. • POR the printer.
• If the error message persists, go to “925.01,
925.03, 925.05—Fan error service check” on
page 2-129.
Error code Description Action