Epson LX-850 Specifications Page 85
- Page / 176
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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REV.-A
3.1 INTERFACE OPTIONS
The LX-8 10/850 is able to utilize the Model 8100 series optional interfaces. The main interfaces are
listed in Table 3-1.
Table 3-1. Optional Interfaces
~
I
Cat. No.
I
Description
RS-232C
Buffer Size
Flag Control
X-O
N\OFF
Max. Bit Rates
Current Loop
Control
(bps)
8143
None
8148
2K/8K
o
0
19200
IEEE-488
Listen Only
Address
(GP4B)
Buffer Size
Function
Operation
Operation
--4
I
I
1
8165
2K/8K
AH, L, DC
o
0
NOTE: For details, refer to the “Optional Interface Technical Manual.”
3.1.1 Model 8143 Serial Interface Operation
With the
RS-232C
and a
20mA
neutral current loop, the printer is able to support the optional Model
8143 interface.
Specifications
Synchronization
Bit rate
Word length
Start bit
Data bits
Parity bit
Stop bit
Signal level
RS-232C
Current loop
Handshaking
Asynchronous
75
to 19200 bps ●
1
bit
7 or 8 bits
●
Odd, Even, or None
‘
1 bit or more
Mark = logical “1” (–3 to –27 V)
Space = logical “O” (+3 to +27 V)
Mark = logical “l” (current ON)
Space = logical “O” (current off)
By REV signal or X-ON/OFF code
(Signal polarity can be inverted by jumper setting.)
“
Selectable by DIP switch.
NOTE: If the parallel interface cable is connected, disconnect it before using the 8143 board, as parallel
interface input is used to read jumper settings and DIP switch status.
3-1
- LX-810/850 1
- PRECAUTIONS 3
- REVISION TABLE 5
- TABLE OF CONTENTS 6
- CHAPTER 1 7
- GENERAL DESCRIPTION 7
- FEATURES 9
- Hardware Specifications 11
- Si_k&lL 12
- Figure 1 14
- Cut-Sheet Printing Area 14
- 3mm min 16
- Printing Columns 19
- See Table 1-10 19
- 1.3 INTERFACE OVERVIEW 20
- 1.4.1 DIP Switch Settings 23
- SELECTYPE 24
- FUNCTION 24
- TEAR-OFF 25
- FUNCTION 25
- 1.8 OPERATING INSTRUCTIONS 26
- 1.8.3 Buzzer Operation 28
- Beeps indefinitely until 28
- 1.6 MAIN COMPONENTS 30
- Control Panel 31
- 1.6.5 Housing 33
- 1-15. Housing 33
- CHAPTER 2 34
- PRINCIPLES OF OPERATION 34
- 2.1 OVERVIEW 37
- Optional 38
- Interface 38
- && 40
- <o—————u 41
- ‘Usir+km+=l 44
- ● EEPROM 45
- ● Power supply circuit 45
- 2.2.1.1 TA Filter Unit 47
- Figure 2-13 48
- 12V DC Power Supply Circuit 48
- Frb’+a*b 49
- Feedback Circuit 51
- Im_IL’’’’ompara’or 53
- UPC494C 54
- 2.2.2 Reset Circuit 56
- Power-off Reset 57
- : Driving Pulley 58
- PD78 10HG 59
- Figure 2-27. SLA7020M Circuit 61
- ““’’’-r’”’ 63
- Table 2-3. Reference Voltage 64
- ON then 66
- ON to IOFF 66
- ON increases 67
- D voltage reaches the 67
- D voltage 67
- C Phase D 68
- -f-e’’Jw-JL&aau 69
- --JvLODJm-J_ 70
- @~{’aperTe~~~~~~~con.ear 71
- ~>TractOrReductiOn 72
- Printhead 75
- This section describes the 75
- operation 75
- $:q:&J1-n—rL 78
- Figure 2-48 79
- 2.2.6 Host Interface 80
- 2.2.8 Ribbon-feed Mechanism 82
- CHAPTER 3 83
- OPTIONAL EQUIPMENT 83
- Cat. No 85
- X-ON/X -OFF 86
- 3.2 CUT SHEET FEEDER C80612* 88
- (0.0039 inches) 89
- 8.5mm(0..33”) 90
- Cut Sheet Feeder Mode 92
- E#j’::::d/w 93
- ‘. . . 94
- E-ring (6) 95
- Figure 3-7. E-Ring Removal 96
- PULL TRACTOR 100
- (@-ring’” 102
- Marks to ‘be Matched 103
- CHAPTER 4 104
- DISASSEMBLY, ASSEMBLY, AND 104
- ADJUSTMENT 104
- LIST OF FIGURES 104
- LIST OF TABLES 106
- JiMwf!3a 108
- DISASSEMBLY AND REASSEMBLY 109
- Casing Removal -1 111
- 4.2.2.2 113
- 3. Remove 115
- (M3 X 6) 115
- Removal of Printer Mechanism 116
- Remove the GND spring 117
- PaDer Guide 118
- Frame (R) 122
- Flat Spring 124
- Shaft Ground 125
- NOTES FOR REASSEMBLY: 129
- Home Position Sensor 130
- NOTES FOR REASSEMBLY 132
- CHAPTER 5 135
- TROUBLESHOOTING 135
- 5.1 GENERAL 136
- UNIT REPLACEMENT 136
- (5) Abnormal Control 143
- UNIT REPAIR 145
- Check point 148
- Solution 148
- Problem Symptom 150
- Symptom Cause 152
- Check point Solution 152
- Printer Mechanism Repair 153
- ● Replace the 154
- 6.1 PREVENTIVE MAINTENANCE 157
- APPENDIX 160
- /APD7810HG 163
- <,”> 165
- (AD7-0) 166
- A.1.2 E05A30 (3B) 168
- SRAM (3D) 170
- A.1.5 SLA7020M (1A) 172
- A.1.6 pPC494C (3A) 173
- A.2 EXPLODED DIAGRAMS AND 174
- SCHEMATICS 174
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