Epson LX-850 Specifications Page 67
- Page / 176
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
Rated. / 5. Based on customer reviews
REV.-A
(7)
IOFF
flow then causes current flow in
R30
to change direction. COMP1 feedback voltage
VRS
(V-) thereby drops below
VREF,
and COMP1 again inverts.
(8)
COMP 1 output stages are formed by an open collector circuit. As a result of the inversion in
step (7),
COMP 1 output goes HIGH, so that
TD
voltage
VTD
gradually rises, in line with the time
constant determined by resistance R59 and capacitance C 15.
(9)
The MOS FET gate voltage is maintained at OFF until the value of the T
D voltage reaches the
COMP2
reference voltage of 2V.
The period above, during which
VTD is rising from OV to
2V,
is equivalent to TOFF.
Chopper on time
(t2-t3)
(1
o)
When TD voltage
VTD
reaches the
COMP2
reference value (2 V),
COMP2
inverts, and Q 1 goes
on.
(1 1)
r
When Q1 goes on, the current flow switches from
IOFF
to ION.
(12)
On the basis of the time content of motor coil A,
loN,
after a certain delay, gradually rises in
response to power source voltage Vcc.
(13)
As I
ON increases,
R30
potential
VRS
also increases. Until the value of
VRS
reaches that of
VREF,
Q1
remains on, supplying current ION from the power source to the motor.
The period in which
VRS
advances toward VTD is equivalent to TON.
2-31
- 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
Related products and manuals for Print & Scan Epson LX-850
Print & Scan Epson Stylus C66 User's Guide
(24 pages)
(24 pages)
Print & Scan Epson L100 User Manual
(2 pages)
(2 pages)
Print & Scan Epson 1010 User Manual
(7 pages)
(7 pages)
Print & Scan Epson CX3800 Service Manual
(171 pages)
(171 pages)
Print & Scan Epson C64 User's Guide
(24 pages)
(24 pages)
(60 pages)
Print & Scan Epson C120 User Manual
(2 pages)
(2 pages)
Print & Scan Epson X-PRF 1000 User's Guide
(245 pages)
(245 pages)
(2 pages)
Print & Scan Epson TM-L90 User Manual
(3 pages)
(3 pages)
© 2020, manymanuals.com. All rights reserved. | 1.248 s |
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comments to this Manuals