Technical data

12 MD400 Scanner Pocket Service Guide
Table 6 (Cont.) Indicator Displays
Indicators
RED GREEN Description
ON
OFF Driving system error
1. Swap scanner.
BLINK OFF ADF residual paper error
1. Remove paper inside ADF.
2. Cycle power to run self-test.
3. Run unit diagnostic test 4.
3.7 ADF Faults
You can check the operation of the ADF by loading
the ADF with paper and running unit diagnostics
test 4.
3.8 Unit Diagnostics
CAUTION
Note the DIP switch settings used for normal
operation before starting unit diagnostics.
Reset to the original setting when returning
the unit to normal operation.
Tests may be selected and controlled from the DIP
switches on the rear panel, as shown in Figure 2.