Lexmark E120 - Power-On Self Test (POST) Sequence

2-8 Service Manual
4506-1xx
Diagnostics—E120n 2
Power–On Self Test (POST) sequence
When you turn the printer on, it performs a POST. Check for correct POST functioning of the base printer by
observing the following process:
1. All operator panel lights turn on momentarily.
2. Lights then flash on and off sequentially.
3. After the lights quit flashing, the light flashes until the fuser comes up to temperature (5–20 additional
seconds, depending on the initial temperature of the fuser) and then stays on.
4. The motor drive and fan come on.
5. If there is a problem in the printer such as a paper jam, the panel lights indicate the problem. See
“Common primary light patterns—E120n” on page 2-9 for more information.
6. The printer cycles down into standby mode, and lights solid.
✷✷
8✷ 10✷ 980 Engine is experiencing
unreliable communications
with the specified device.
Replace the controller card. See “Controller
card removal” on page 4-17.
✷✷
8✷ 1✷ 981 Engine protocol
violation is detected by the
device.
✷✷
8✷ 2✷ 982 Communication error is
detected by the specified
device.
✷✷
8✷ 3✷ 983 Invalid command is
received by the specified
device.
✷✷
8✷ 4✷ 984 Invalid command
parameter is received by
the specified device.
✷✷
9✷ 10✷ 990 Device equipment
check
Replace the controller card. See “Controller
card removal” on page 4-17.
✷✷
9✷ 1✷ 991 Device system card
failure
Replace the controller card. See “Controller
card removal” on page 4-17.
Primary Secondary Tertiary
Description Action
Ready/
Data
Ready/
Data
Ready/
Data