Epson LX-850 Specifications download pdf (Page 115)

REV.-A

4.2.3.2 TA Filter Unit Removal

1. Remove the upper casing (refer to Section 4.2.2.1).

2. Disconnect connector CN9 at the TAMA board. This connector connects the TA

filter unit.

3. Remove

the CB(0)

(M3

x 6) screws securing the frame GND wire.

4. Remove the

CBB

(M3

x 12) screws and CB(0)

(M3

x 6) screws securing the filter unit, and then remove

the unit.

CB(0)

(M3 X 6)

cJ19

CBil

cd(o)

‘

TA Filter

CB6 CB(0)

(M3

X 12)

(M3

unit

(M3

X 12)

(M3

X 6)

Figure 4-10. TA Filter Unit Removal

4-9

1 2 ... 110 111 112 113 114 115 116 117 118 119 120 ... 175 176

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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Epson LX-850 Specifications Page 115

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