Operating Principles
2-14
EPSON FX-880/FX-1180 Service Manual
Control Circuit
The C229 MAIN board is the control circuit board for the FX-1180 and FX-880. The control circuit includes
a TM96C141AF CPU that runs at 14.47 MHz, an E05B50 gate array that contains various memory
management functions, a reset IC, EEPROM, etc. The table below shows the functions of the main board
components.
Table 4. MAIN Board Components and Functions
Component
Address
Function
TMP96C141AF
IC3
CPU; controls the C229 main board. It performs the
functions below:
❏
Receives data from the host computer and loads it to
the input buffer in RAM
❏
Expands the input data held in the buffer to create
image data
❏
Loads the image data to the image buffer in RAM
❏
Transfers the image data to the printhead drive circuit
❏
Controls various printer mechanism parts, such as
motors.
E05B50
IC2
Gate array; performs the functions below:
❏
Controls the printhead
❏
Controls the parallel and optional type B interface
❏
Controls the control panel
❏
Controls the PF motor and changes over the CR motor
current
PST594E
IC1
Reset IC for performing a system reset.
AT93C46
IC4
EEPROM, used to store information such as top-of-form
position.
PSRAM
IC5
The PSRAM contains the CPU working area and
buffers.
ROM
IC7
2/4 MB EEPROM and Mask ROM.
SLA7024M
IC8
Driver circuit for the carriage return (CR) motor.
A2917SEB
IC11
Driver circuit for the paper feed (PF) motor.
Comparator
IC12
Power-off signal sensing.
Summary of Contents for FX-1180 - Impact Printer
Page 1: ...Epson America Inc TM FX88 1180 Service Manual FX 880 FX 1180 ...
Page 4: ...iv EPSON FX 880 FX 1180 Service Manual ...
Page 6: ...vi EPSON FX 880 FX 1180 Service Manual ...
Page 11: ...Product Descriptions 1 ii EPSON FX 880 FX 1180 Service Manual ...
Page 42: ...Operating Principles 2 ii EPSON FX 880 FX 1180 Service Manual ...
Page 60: ...Disassembly and Assembly 3 ii ESPON FX 880 FX 1180 Service Manual ...
Page 94: ...Adjustments 4 ii EPSON FX 880 FX 1180 Service Manual ...
Page 103: ...Troubleshooting 5 ii EPSON FX 880 FX 1180 Service Manual ...
Page 128: ...Maintenance 6 ii EPSON FX 880 FX 1180 Service Manual ...
Page 135: ...Appendix A ii EPSON FX 880 FX 1180 Service Manual ...
Page 143: ...Appendix A 8 EPSON FX 880 FX 1180 Service Manual Figure A 3 C229 PSB Board Component Layout ...
Page 144: ...Appendix EPSON FX 880 FX 1180 Service Manual A 9 Figure A 4 C229 PSE Board Component Layout ...
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