Technical Brief (Impact Printers)
Page 4
...connection AppleTalk connection Compatibility PC/Macintosh PC/Macintosh PC PC PC/Macintosh Macintosh When an optional interface is added, EPSON impact printers automatic interface switching feature will automatically advance the paper to the tear-off , paper parking, and microfeed ... Windows NT 3.51/4.0, Windows 95 and Windows 98 drivers guarantees ease of use right out of built-in fonts Each EPSON impact printer includes a variety of the box. DOS applications will overide all EPSON impact printers Proportionally-spaced scalable fonts-selectable in favor of their respective...
...connection AppleTalk connection Compatibility PC/Macintosh PC/Macintosh PC PC PC/Macintosh Macintosh When an optional interface is added, EPSON impact printers automatic interface switching feature will automatically advance the paper to the tear-off , paper parking, and microfeed ... Windows NT 3.51/4.0, Windows 95 and Windows 98 drivers guarantees ease of use right out of built-in fonts Each EPSON impact printer includes a variety of the box. DOS applications will overide all EPSON impact printers Proportionally-spaced scalable fonts-selectable in favor of their respective...
Service Manual
Page 38
...CPU TM P90C041F CENTRONICS l/F CR MOTOR \//r g;!f;24M r~ \ ;--o'"-y qE2pR0M ,0 (0 0ml0 ,PS RAM E I 4;~- 'OM HEAD DRIVE CN2 for OPTION l/F ? PF MOTOR DRIVER LPAI 476H CPU TM P90C041F CENTRONICS l/F CR MOTOR o ~~~f~4M ~ ~> E2PROM 7 \ n \ Ill \' " q " *PS RAM 1 Cl"lp E ~ o0 Q...main functions of a TMP90C041F 8-bit CPU, an E05A55YA gate array, an E2PROM, a PSRAM, a MASK ROM, motor drivers, and head drive transistors. It consists of the printer. BOARD ASSEMBLY, C094 MAIN (Main Control Circuit B-d 1-29 q.6.I BOARD ASSEMBLY, C094 MAIN (Main Control Circuit Board) ...
...CPU TM P90C041F CENTRONICS l/F CR MOTOR \//r g;!f;24M r~ \ ;--o'"-y qE2pR0M ,0 (0 0ml0 ,PS RAM E I 4;~- 'OM HEAD DRIVE CN2 for OPTION l/F ? PF MOTOR DRIVER LPAI 476H CPU TM P90C041F CENTRONICS l/F CR MOTOR o ~~~f~4M ~ ~> E2PROM 7 \ n \ Ill \' " q " *PS RAM 1 Cl"lp E ~ o0 Q...main functions of a TMP90C041F 8-bit CPU, an E05A55YA gate array, an E2PROM, a PSRAM, a MASK ROM, motor drivers, and head drive transistors. It consists of the printer. BOARD ASSEMBLY, C094 MAIN (Main Control Circuit B-d 1-29 q.6.I BOARD ASSEMBLY, C094 MAIN (Main Control Circuit Board) ...
Service Manual
Page 110
v Refer to Section 5.5, Repairing the Printer Mechanism. END * END * Note: If any coils in the CR motor are shorted, also test the motor drivers on the BOARD ASSY., C094 MAIN. 5-6 coil resistance correct (5 ohms +/- 7 '%. REV.-A Flowchart (2) carriage operation abnormal START CN3, 4, 5, 6, 7, 8, 9, and 13 connecting the BOARD ASSY., C094 MAI and the printer mechanism Yes Secure the connectors. problem corrected? at room v Replace the BOARD ASSY,, C094 MAIN. problem corrected?
v Refer to Section 5.5, Repairing the Printer Mechanism. END * END * Note: If any coils in the CR motor are shorted, also test the motor drivers on the BOARD ASSY., C094 MAIN. 5-6 coil resistance correct (5 ohms +/- 7 '%. REV.-A Flowchart (2) carriage operation abnormal START CN3, 4, 5, 6, 7, 8, 9, and 13 connecting the BOARD ASSY., C094 MAI and the printer mechanism Yes Secure the connectors. problem corrected? at room v Replace the BOARD ASSY,, C094 MAIN. problem corrected?
Service Manual
Page 112
REV.-A Flowchart (4) paper feeding abnormal c" (==) Load the paper correctly. Repair the BOARD ASSY., C094 MAIN. Insert connector CN6 correctly. I Refer to Section 5.5, Repairing the Printer Mechanism. coil resistance correct (63 ohms +/- 3 at room smoothly when the printer No [ I Yes vEND vEND Note: If any coils in the PF motor are shorted, also test the motor drivers on the BOARD ASSY., C094 MAIN. 5-8 END * Replace the PF motor.
REV.-A Flowchart (4) paper feeding abnormal c" (==) Load the paper correctly. Repair the BOARD ASSY., C094 MAIN. Insert connector CN6 correctly. I Refer to Section 5.5, Repairing the Printer Mechanism. coil resistance correct (63 ohms +/- 3 at room smoothly when the printer No [ I Yes vEND vEND Note: If any coils in the PF motor are shorted, also test the motor drivers on the BOARD ASSY., C094 MAIN. 5-8 END * Replace the PF motor.
Service Manual
Page 123
... wires Check the common moves, but does not feed paper properly. in the printhead FFC wires in Chapter 4. there is defective. The printer does not print a particular dot. The printhead is no continuity. The correct gap is defective. Foreign substances are disconnected, or printhead FFC...should be approximately 63 ohms. Replace the MOTOR ASSY., PF. (If any pin is shorted, also check the drivers on the main board. Paper feeding abnormal. defective gear. The printer prints but the self- Replace the FFC. Table 5-6. Check if the tip of the dot wire is worn...
... wires Check the common moves, but does not feed paper properly. in the printhead FFC wires in Chapter 4. there is defective. The printer does not print a particular dot. The printhead is no continuity. The correct gap is defective. Foreign substances are disconnected, or printhead FFC...should be approximately 63 ohms. Replace the MOTOR ASSY., PF. (If any pin is shorted, also check the drivers on the main board. Paper feeding abnormal. defective gear. The printer prints but the self- Replace the FFC. Table 5-6. Check if the tip of the dot wire is worn...