Minolta EP5000 General, Mechanical/Electrical page 257

Interleaf EP5000/EP4000 SWITCHES ON PWBs, TECH. REP. SETTINGS
97.04.01
Touch Panel
Display
Memory Check Touching the Memory Check key causes the copier to automatically check the
ROM/RAM on MSC Board PWB-B.
Controller Board Touching the Controller Board Check key causes the copier to perform a self-
Check diagnostics of Master Board PWB-A.
Panel Indication Checks the LEDs and Touch Panel on the control panel for correct operation.
Check <Procedure>
1. Touch the Panel Indication Check key.
2. All LEDs light up and then each LED goes out in the following order. When all
LEDs go out, they all light up again and the above sequence is repeated. (The
LEDs should alternately light up and go out in said manner.)
3. A checkered pattern appears on the Touch Panel.
4. Select an individual grid. The grid should switch from white to black, or vice
versa, when it is selected. If it works that way, the corresponding liquid crystal
is considered to be operational.
5. Press the Panel Reset key to complete the procedure.
Tech. Rep. Mode " I/O Check
Operation
Result Display
Normal "Memory check completed.
Turn the main switch OFF, and
then ON."
"ROM ERROR"
"MESSAGE
ROM ERROR"
Faulty
"RAM ERROR"
"VRAM ERROR"
"LCDTC ERROR"
Result Display
Normal The highlighted "Controller
Board Check" key is returned
to normal display.
Faulty The malfunction code appears. Change PWB-A.
All ON Mode Check
key
Start key (orange)
S-33
Action
Turn OFF, then ON, the
Power Switch.
Change PWB-B (IC2B)
Change PWB-B (IC2B)
Change PWB-B.
Change PWB-B.
Change PWB-B.
Action
None
Energy Saver Interrupt key
key
Start key (green)