EPSON AcuLaser C1100 Revision B
TROUBLESHOOTING Procedure for troubleshooting 122
3.1.4 Notes on Using FIP
1. The troubleshooting method described here assumes that there is no
malfunction in the printer controller (PWBA ESS). If you cannot fix a
problem even by following the troubleshooting procedure, replace the
printer controller with a normal one and then follow the same procedure. If
you cannot recover the printer from the trouble even with the printer
controller replaced, replace the “Possible parts that caused the error”
shown in FIP and related parts with new ones in order one by one, and
repeat operation checks.
2. Some normal parts such as MCU, LV/HVPS, FUSER ASSY, 2ND BTR
ASSY may be required as FIP troubleshooting tools to identify the cause of
the trouble. So, you need to have those spares in advance.
3. Be sure to unplug the POWER CORD before starting troubleshooting work
except when turning power ON is needed. Never touch any live parts
unnecessarily with the power cord connected.
4. Conventions used to represent connectors are as follows:
“P/J12” = The connector (P/J12) in a connected state.
“P12” = The plug side in connector (P/J12) disconnected state. (except
when the jack is directly mounted on the board)
“J12” = The jack side in connector (P/J12) disconnected state. (except
when the jack is directly mounted on the board)
5. When, for example, “P/J1-2PIN ↔ P/J3-4PIN” is indicated in FIP for the
voltage check, set the plus side of a measuring tool to “2PIN” on “P/J1”
and set the minus side of the tool to “4PIN” on “P/J3”.
6. When, for example, “P/J1 ↔ P/J2” is indicated in FIP for the voltage
check, check for the all relating terminals between “P/J1” and “P/J2” with
reference to the Connection Diagram.
7. Taking “P/J1-2PIN ↔ P/J3-4PIN” as an example, the minus side “P/ J3-
4PIN” is AG (Analog Ground), SG (Signal Ground), or RTN (Return).
Therefore it is possible to connect to another AG, SG, or RTN pin as the
minus side instead of “P/J3-4PIN”. Before doing so, check that each AG-
to-AG, SG-to-SG, or RTN-to-RTN has continuity properly. Be careful not
to connect to a wrong pin since the level of AG, SG and RTN are different
from each other.
8. When measuring the voltage, perform measurement with the
Photoconductor Unit, 2ND BTR ASSY, and paper cassette loaded, covers
closed, and power ON.
9. All voltage values given in the FIP are approximate values. So actually
measured values should not be completely the same as those given in the
FIP.
10. Note that FIP does not provide any description on removal of parts which
are supposed to be removed to remove the target part, and the procedures.
11. Any parts listed in “Possible parts that caused the error” in the FIP are
regarded as the source of the trouble and signifies that the parts or the
assemblies (HIGH ASSY) containing those parts should be replaced with
normal ones one by one, and checking should be repeated.
12. In the FIP, the optional paper feeder of the printer is called “Tray1”.
13. FIP may contain descriptions that distinguish between certain
specifications. Be sure to follow such instructions properly to remedy the
problem.