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Sensor Trimmer Adjustment

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EPSON Stylus Pro 9000 SENSOR TRIMMER ADJUSTMENT After replacing the C277MAIN board, you need to adjust the sensitivity of three sensors: Paper Edge Sensor, Front Paper Sensor, and Rear Paper Sensor. You also need to perform this adjustment if you replace one or more of these sensors (perform the adjustment only for the sensors that you replace). To perform the adjustment, you need to access variable resistors VR1-VR3 on the Main Board (see the figure at right). Remove the access plate on top of the Upper Paper Guide (see Figure 4-13 on page 64). Enter the Self-Diagnostic Mode (see Using the Self-Diagnostic Mode on page 108), select "Test Menu," and then select "Sensors" (see Sensors on page 112). Then follow the instructions below for each sensor that you need to adjust. When making this adjustments, avoid strong light (such as sunlight) near the printer. These sensors are photo-sensitive and do not function properly under strong lighting. Paper Edge Sensor 1. Move the carriage left and right manually and make sure that the signal level indicated on the LCD is smaller than 18H (hexadecimal value). 2. Place a sheet of coated ink jet paper in the paper path, and lower the Paper Release Lever to lock the paper in position. 3. Move the carriage over the paper so that the Paper Edge Sensor is located in the middle of the paper. 4. Adjust VR1 on the Main Board so that the signal level indicated on the LCD is 80H ±8H (between 78 and 88, hex). Front Paper Sensor 1. As above, make sure that the signal level indicated on the LCD is smaller than 18H. 2. Place a sheet of coated ink jet paper in front of the Front Paper Sensor located on the Lower Paper Guide; lower the Paper Release Lever to lock the paper in position. 3. Adjust VR2 on the Main Board so that the signal level indicated on the LCD is 87H ±8H (between 7F and 8F, hex). Rear Paper Sensor 1. As above, make sure that the signal level indicated on the LCD is smaller than 18H. 2. Place a sheet of coated ink jet paper over the Rear Paper Sensor located in the Upper Paper Guide, and hold it in place or secure it with tape. 3. Adjust VR3 on the Main Board so that the signal level indicated on the LCD is 8AH ±8H (between 82 and 92, hex). Table 5-14. Sensor Adjustment Values Sensor Without Paper With Paper Paper Edge Sensor Front Paper Sensor Rear Paper Sensor 18H or less 18H or less 18H or less 80H ±8H 87H ±8H 8AH ±8H Adjustments 136

Section	Page
EPSON Stylus Pro 9000	1
Guide to Using This Manual	2
Copyright and Trademark Notice	3
FCC Compliance Statement	4
Precautions	5
Contents	6
Chapter 1 - Printer Basics	10
1.1 Features	11
1.2 Control Panel Operations	12
1.2.1 Control Panel Buttons	12
1.2.2 SelecType Mode	13
Printer Setting Menu	14
Test Print Menu	15
Printer Status Menu	15
Paper Configuration Menu	16
Cutter Replace Menu	16
Head Alignment Menu	16
1.2.3 Service-Related Modes	17
1.3 LED Indicators and Error Messages	18
1.3.1 LED Indicators	18
1.3.2 LCD Display	19
1.4 Options and Consumables	20
Chapter 2 - Technical Overview	21
2.1 Location of Components	22
Carriage Mechanism	22
Paper Feed Mechanism	22
Ink System	23
Circuit Boards	23
2.2 Operation	24
2.2.1 Carriage Mechanism	24
Carriage (CR) Guide Rail	24
Platen Gap (PG) Mechanism	24
Paper Width Sensor	25
Carriage Motor and Position Control	26
Cutter Mechanism	27
Printheads	27
2.2.2 Paper Feed Mechanism	28
Paper Feed Motor and Rollers	28
Paper Feed Sensors	29
Paper Suction Fan	30
Paper Width Determination (Left and Right edge Detection)	31
Paper size Determination (Detection of Top edge)	32
Paper Loading Errors	33
2.2.3 Carriage Lock Mechanism	33
2.2.4 Ink Supply Mechanism	34
Ink-Related Sensors	35
2.2.5 Cover Open Sensor	36
2.2.6 Control Circuit	37
3.1 Overview	39
3.2 Troubleshooting Using LCD Error Messages	39
3.3 Print Quality Troubleshooting	49
Missing Dots or Lines	49
No Ink Output from One or Both Printheads	50
Uneven Printing or Poor Resolution	50
Smudged or Marred Printout (Front)	51
Smudged or Marred Printout (Reverse side)	51
White or Black Banding	51
3.4 Connector-Related Errors	52
Chapter 4 - Disassembly and Assembly	54
4.1 Overview	55
4.1.1 Precautions	55
4.1.2 Tools	56
4.1.3 Screw List	56
4.1.4 Order of Disassembly	57
4.1.5 Housing Parts	58
4.2 Housing Removal	58
Maintenance Cover Removal	58
Top Cover Removal	59
Left and Right Side Cover Removal	60
Front Cover Removal	61
Roll Cover Removal	62
Lower Paper Guide Removal	63
Upper Paper Guide Removal	64
4.3 Circuit Board Removal	65
Power Supply Board Removal	65
Main Board Removal	66
4.4 Maintenance Procedures	67
Replacing the Waste Ink Pads	67
Maintenance Assembly Removal & Disassembly	69
4.5 Printer Mechanism Disassembly	71
Replacing the Printheads	71
Removing the Carriage Motor Assembly	75
Removing the PF Motor Assembly	76
Removing the Platen Gap Adjustment motor	78
Removing the Platen Gap Home Position Sensor	78
Removing the Cover open Sensors	79
Removing the Paper Thickness Sensor	80
Removing the Rear Paper Sensor	80
Removing the Front Paper Sensor	81
Removing the Paper Release Sensor	81
Removing the Carriage Home Position Sensor and Encoder	82
4.6 Ink Holder Disassembly	84
4.6.1 Removing the I/C Holder Assembly	84
4.6.2 Disassembling the I/C Holder	91
4.7 Removing the Ink Tubes	92
Preparation	92
Removing the Ink Pipe Covers	92
Separating the ink pipes and ink tubes	92
Removing the CR circuit board	93
Disconnecting the ink dampers	93
Removing the cable connection plate	94
4.7.1 Ink Tubing Reassembly	95
Installing the cable connection plate	95
Positioning the tube guides and FFCs	95
Connecting the ink tubes to the ink pipes	96
Securing the the ink tubes and ink pipes	96
Securing the tube guides on the CR side	96
Checking the ink tubes	97
Attaching the CR circuit board	97
Connecting the carriage FFCs	97
Connecting the ink tubes and dampers	98
Confirming the tube guide assembly position	99
Connecting the carriage FFCs to the relay circuit board	100
Resetting the printer	100
Chapter 5 - Adjustments	101
5.1 Overview	102
5.1.1 Precautions	102
5.1.2 Adjustment Tools	102
5.1.3 Required Adjustments	103
5.2 ROM Backup and Updating	105
Requirements for Backup	105
Backup Procedure	105
Download Procedure	106
Possible Errors During Backup or Downloading	106
5.2.1 Firmware Update	106
Updating From a PC	106
Updating From a Memory Card	107
5.3 Self-Diagnostics	107
5.3.1 Using the Self-Diagnostic Mode	108
5.3.2 Self-Diagnostic Menus	109
5.3.3 Test Menu	110
Version	111
Control Panel	111
Sensors	112
Encoder	113
Fan	113
Elec. (Maintenance Records)	113
5.3.4 Adjustment Menu	115
Cap Position Adjustment	116
Check Skew	117
Input Rank (Printhead ID) Adjustment	117
Check Nozzle	118
B Head Slant/C Head Slant Adjustment (Head Angle)	119
BC Head Slant Adjustment (Head Height)	120
Bi-D Adjustment	121
Head LR Adjustment (Head Gap Timing)	123
Flush Point Right and Left Adjustment	124
Feed Adjustment	124
Top & Bottom (Margin) Adjustment	125
Rear Sensor Position Adjustment	126
Test Print	127
Clean Head (Drain Ink)	127
Counter Clear	128
5.3.5 Cleaning menu	128
5.3.6 Print menu	128
5.3.7 Parameter menu	129
Initialize	129
Update	129
5.4 Mechanical Adjustments	130
Carriage Cover Height Adjustment	130
Cutter Position Adjustment	131
Carriage Belt Tension Adjustment	132
PF Belt Tension Adjustment	132
Platen Gap Gear Backlash Adjustment	133
I/H Lever Position Adjustment	133
Paper Thickness Sensor Adjustment	134
Cover Open Sensor Assembly (Right and left)	135
Sensor Trimmer Adjustment	136
Chapter 6 - Maintenance	137
6.1 Overview	138
6.2 Physical Inspection and Cleaning	138
6.3 Lubrication	139
6.4 Checking and Clearing Counters	139
6.4.1 Checking Maintenance Counters	140
6.4.2 Clearing Maintenance Counters	140
6.5 Service Error Codes and Replaceable Parts	143
6.5.1 The Difference Between a ‘Maintenance Call’ and a ‘Service Call’	143
6.6 Ink Cartridge Replacement	144
6.7 Cutter Blade Replacement	144
Chapter 7 - Appendix	145
7.1 Unpacking and Transporting the Printer	146
7.1.1 The Packaging	146
Before Opening the Large & Medium boxes	146
7.1.2 Contents of the Packaging	146
Medium-size box	146
Large box	147
7.1.3 Unpacking and Assembly	147
From unpacking to assembling the Stand	147
Assembling the Printer body	151
7.1.4 Repacking and Transporting the Printer	155
Before Shipping	155
After Shipping	155
7.2 Specifications	156
7.2.1 Mechanical	156
7.2.2 Safety Approvals	157
7.2.3 CE Marking	157
7.2.4 Electrical	158
7.2.5 Environmental	158
7.2.6 Ink Cartridge	158
7.2.7 Controller	159
7.2.8 Cutter	159
7.2.9 Paper	160
7.2.10 Paper Release Lever	162
7.2.11 Interface	162
7.3 Initialization	169
7.4 Jumper and DIP Switch Settings	170
7.5 Connector Summary	171
7.6 Parts List	173
7.7 Exploded Diagrams	179
7.8 Main Board Component Layout	194

Match case Limit results 1 per page

EPSON Stylus Pro 9000

Adjustments

136

SENSOR TRIMMER ADJUSTMENT

After replacing the C277MAIN board, you need to adjust the sensitivity of three

sensors: Paper Edge Sensor, Front Paper Sensor, and Rear Paper Sensor.

You also need to perform this adjustment if you replace one or more of these

sensors (perform the adjustment only for the sensors that you replace).

To perform the adjustment, you need to access variable resistors VR1-VR3 on

the Main Board (see the figure at right). Remove the access plate on top of the

Upper Paper Guide (see

Figure 4-13

on page 64). Enter the Self-Diagnostic

Mode (see

Using the Self-Diagnostic Mode

on page 108), select "Test

Menu," and then select "Sensors" (see

Sensors

on page 112). Then follow the

instructions below for each sensor that you need to adjust.

Paper Edge Sensor

Move the carriage left and right manually and make sure that the signal

level indicated on the LCD is smaller than 18H (hexadecimal value).

Place a sheet of coated ink jet paper in the paper path, and lower the

Paper Release Lever to lock the paper in position.

Move the carriage over the paper so that the Paper Edge Sensor is located

in the middle of the paper.

Adjust VR1 on the Main Board so that the signal level indicated on the LCD

is 80H ±8H

(between 78 and 88, hex).

Front Paper Sensor

As above, make sure that the signal level indicated on the LCD is smaller

than 18H.

Place a sheet of coated ink jet paper in front of the Front Paper Sensor

located on the Lower Paper Guide; lower the Paper Release Lever to lock

the paper in position.

Adjust VR2 on the Main Board so that the signal level indicated on the LCD

is 87H ±8H

(between 7F and 8F, hex).

Rear Paper Sensor

As above, make sure that the signal level indicated on the LCD is smaller

than 18H.

Place a sheet of coated ink jet paper over the Rear Paper Sensor located

in the Upper Paper Guide, and hold it in place or secure it with tape.

Adjust VR3 on the Main Board so that the signal level indicated on the LCD

is 8AH ±8H

(between 82 and 92, hex).

When making this adjustments, avoid strong light

(such as sunlight) near the printer. These sensors are

photo-sensitive and do not function properly under

strong lighting.

Table 5-14.

Sensor Adjustment Values

Sensor

Without Paper

With Paper

Paper Edge Sensor

18H or less

80H ±8H

Front Paper Sensor

18H or less

87H ±8H

Rear Paper Sensor

18H or less

8AH ±8H