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Stylus Photo 750
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Epson Stylus Photo 750 Сервис мануал онлайн

EPSON Stylus Photo 750

Color Inkjet Printer

SEIJ98005

6(59,&(#0$18$/

6(59,&(#0$18$/6(59,&(#0$18$/

6(59,&(#0$18$/

Содержание

Stylus photo 7850 1
Notice 2
Danger 3
Precautions 3
Warning 3
About this manual 4
Contents 4
Symbols used in this manual 4
Revision issued date description 5
Revision status 5
Adjustment 6
Disassembly and assembly 6
Operating principles 6
Product description 6
Stylus photo 750 revision a 6
Table of contents 6
Troubleshooting 6
Appendix 7
Maintenance 7
Stylus photo 750 revision a 7
Product description 8
General characteristics 9
Overview 9
General description 10
Printing 10
Paper feeding 11
Paper specification 11
Cut sheet 12
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Figure 1 3 printable area 12
Note bottom margin can be set up to 3mm at minimum when the paper length is designated with esc s command however there is the possibility that a printing scrambles in the area ranging from 3mm to 14mm from the form lower end when the paper length is not designated the bottom margin must be wider than 14 mm 12
Printable area 12
Product description general description 7 12
Table 1 3 printable area 12
The figure below shows printable area 12
Adjust lever settings 13
Envelope 13
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Figure 1 4 printable area 13
Figure 1 5 adjust lever 13
Product description general description 8 13
Table 1 4 envelope 13
Table 1 5 setting position of adjust lever 13
The adjust lever located under the printer cover right side needs to be set for the proper paper setting according to the paper type 13
Environmental conditions 14
Black ink cartridge 15
Color ink cartridge 15
Ink cartridge 15
Acoustic noise 16
Electric specification 16
Input data buffer 16
Reliability 16
Safety approvals 16
Ce marking 17
Esc p control codes 17
Printer language and emulation 17
Busy signal is set high before setting either error low or pe high and is held high until all these signals return to their inactive state 19
Busy signal is set high level in the following cases during data entry see data transmission timing when input data buffer is full during init signal is at low level or during hardware initialization during printer error see error signal when the parallel interface is not selected 19
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Error signal is at low level when the printer is in one of the following states printer hardware error fatal error paper out error paper jam error ink out error 19
Forward channel is the mode to transfer the ordinary printing order to the printer side from the pc side 19
Parallel interface 19
Parallel interface forward channel 19
Pe signal is at high level during paper out error 19
Product description parallel interface 14 19
Table 1 6 parallel i f 19
Table 1 7 connector pin assignment and signals 19
This printer has ieee 1284 parallel interface rs 423 serial interface and usb interface as standard 19
Device id the printer sends following device id string when it is requested 20
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Extensibility request the printer responds affirmatively when the extensibility request values are 00h or 04h that mean 00h request nibble mode reverse channel transfer 04h request device id return data using nibble mode rev channel transfer 20
Note in out refers to the direction of signal flow from the printer s point of view 20
Parallel interface reverse channel 20
Product description parallel interface 15 20
Reverse channel is used to transfer the information data from the printer side to the pc side 20
Table 1 8 connector pin assignment and signals 20
When ieee1284 protocol is effective 00h 57h mfg epson cmd escpl2 bdc d4 mdl stylusspphotosp750 cls printer des epsonspstylusspphotosp750 20
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Note 00h denotes a hexadecimal value of zero sp denotes a space character 20h mdl and des values depend on the eeprom setting 21
Product description parallel interface 16 21
Table 1 9 connect pin assignment and signals 21
When ieee1284 protocol is not effective 00h 57h mfg epson cmd escpl2 bdc mdl stylusspphotosp750 cls printer des epsonspstylusspphotosp750 21
Epson stylus photo 750 revision a 23
Figure 1 10 serial i f connector port 23
Following figure shows port arrangement of serial i f connector 23
Following table shows timing relation of dtr x on x off handshaking 23
Note in out refers to the direction of signal flow from the printer s point of view 23
Product description parallel interface 18 23
Serial interface 23
Table 1 11 serial interface 23
Table 1 12 connector pin assignment and signals 23
Table 1 13 x on x off dtr protocol 23
This section shows specification for serial interface i f 23
Usb universal serial bus interface 24
Ieee 1284 protocol 25
Interface selection 25
Prevention of data transfer time out on the host 25
Bi directional command 26
Control code 26
Control panel 26
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Figure 1 12 control panel 26
Function 26
Note 1 refer to table 1 17 status printing on page 22 2 not described in the user s manual not open to the users 3 see the table in the section special setting mode 26
Product description function 21 26
Remote setting command refer to remote command specification for details 26
Since this printer does not have so many switches each button has several functions the tables below show their functions and how to enter those functions for each switch 26
Switches 26
Table 1 15 panel functions in normal state 26
Table 1 16 panel function with turning on 26
There are 2 non lock type push switches 1 lock type push switch and 4 leds the figure below shows the exterior view of the control panel 26
This printer is operated with the raster graphics control code based on the esc p2 control line refer to esc pv2 reference manual and esc p2 specification for each command and esc sequence 26
Led indications 27
Special setting mode 27
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Errors 28
In this printer when the following conditions are detected the printer goes to the error condition sets error signal low and busy signal high and stops receiving the data the printer becomes unable to print at this time however if the printer communicated by ieee1284 protocol the printer does not become unprintable state 28
Ink out when the printer runs out most of the ink of any one color it indicates ink low warning and keeps printing when the print runs out the whole ink of any one color it indicates ink error and stops printing exchanging ink cartridges is required on this state an ink cartridge taken out once should not be used again re installation of the cartridge upsets the ink level detection and may cause a serious problem to the print head as a result 28
Never use or re install the cartridge which is taken out once re installation of the used cartridge disturbs the normal ink out detection 28
Note 1 refer to fatal error under the errors on page 23 2 eeprom reset does not mean to erase all address in eeprom see special setting mode on page 22 3 in the table above means no change 28
Paper jam when the printer fails to eject a sheet it becomes paper jam error condition 28
Paper out when the printer fails to load a sheet it becomes paper out error condition 28
Product description function 23 28
Table 1 19 printer status displayed on the control panel 28
Initialization 29
Initialization setting 30
Physical specification 30
Consumables and options 31
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Product description function 26 31
Table 1 20 consumables 31
The consumables and options for this printe are following 31
Operating principles 32
Overview 33
Printer mechanism 33
C257 psb power supply circuit 35
Operating principles of electric circuit 35
42v line constant voltage control circuit the output level of the 42v line is monitored by a detection circuit consisting of seven zener diodes this circuit prevents from dropping for constant output voltage 36
42vdc line drop limitation circuit this protection circuit is in the same line as 42v over voltage protection circuit is located the output voltage level of the 42v line is monitored by a zener diode this circuit shuts down the circuit operation forcefully when the voltage levels drops 36v 36
42vdc line over voltage circuit this circuit is in the same line as 5v line over voltage protection circuit is installed the output level is monitored by two zener diodes if the voltage level exceeds 48vdc this circuit stops circuit operation forcefully 36
5v line constant voltage constant current control circuit the output current is monitored by a 5vdc generation switching control ic ic51 which also monitors the output voltage this information is input to the internal comparator and stabilizes 5v line 36
5v line over voltage protection circuit this protection circuit is in the same line as 42v over voltage protection circuit is located the output voltage level of the 5v line is monitored by a zener diode this circuit shuts down the circuit operation forcefully when the voltage level exceeds 9v 36
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Figure 2 3 power supply circuit block diagram 36
Operating principles operating principles of electric circuit 31 36
Trans t1 36
C259 main control circuit 37
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Figure 2 4 control circuit block diagram 37
Major elements 37
Major elements used in c259 main control circuit board are below 37
Operating principles operating principles of electric circuit 32 37
Printer mechanism is controlled by c259 main board the figure below shows the block diagram of c259 main control circuit 37
Table 2 2 major elements 37
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Figure 2 5 reset circuit 38
Operating principles operating principles of electric circuit 33 38
Reset circuit 38
Reset circuit consists of reset timer ic ic8 and peripheral elements the reset timer ic prevents the cpu from running away which is caused by the unstable voltage 5vdc line voltage is less than 4 v in the logic line during the power on off operation also ic sends the reset signal to the cpu and gate array when 42vdc line voltage is less than 35 v 38
Sensor circuit 39
At93c46 ic7 40
Cpsi pass word 40
Destination data 40
Driven voltage wave form circuit this circuit consists of hic ic14 and terminal transistor and generates drive wave which will be charged to each pzt 40
E05b58 ic2 40
Eeprom control circuit 40
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Figure 2 7 eeprom control circuit 40
Figure 2 8 common drive circuit 40
Frequency of cleaning 40
Head drive circuit 40
Head drive circuit of this printer consists of the following circuits 40
Ink consumption counter black color 40
Operating principles operating principles of electric circuit 35 40
Other various setting values 40
The timer of this printer uses reset timer ic ic8 the timer keeps record of how long the printer is off and uses it information to judge it the initial cleaning should be performed or not when the power it turned on next time the data in the ic is backed up by the lithium battery 40
This printer uses non volatile memory eeprom ic7 when turning the power on eeprom outputs data to the gate array ic2 and records the data when turning the power off the data which eeprom will record are followings 40
Timer circuit 40
Driver on the head the driver on the head is nozzle selector drive circuit each drive waveform generated in the drive voltage wave form circuit is charged to the selected nozzle by this circuit with pzt elements then printing is performed 41
Epson stylus photo 750 revision a 41
Figure 2 9 paper feed pump motor drive circuit 41
Ic12 and ic13 on the control circuit board drive pf pump motor this motor uses 4 phase 200 pole hybrid type stepping motor and drives constant current bi pola 41
Operating principles operating principles of electric circuit 36 41
Paper feed pump motor pf pump motor drive circuit 41
Carriage motor cr motor drive circuit 42
Cr motor is driven by ic11 mounted on the c259 main control board 4 phase 200 pole hybrid type stepping motor is used as a cr motor and is driven by bi pola constant drive control 42
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Figure 2 10 carriage motor drive circuit 42
Operating principles operating principles of electric circuit 37 42
Troubleshooting 43
Epson stylus photo 750 revision a 44
Figure 3 1 troubleshooting flowchart 44
Overview 44
Table 3 1 motor coil resistance 44
Table 3 2 sensor check point 44
This section describes how to identify and troubleshoot the problems when repairing the printer by dividing the troubles into two levels repair and replacement of the assemblies and units and repair of the components refer to the flowchart below and perform repairing the component after separating the defective units 44
Troubleshooting overview 39 44
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Table 3 3 error indication 45
Troubleshooting overview 40 45
Abnormal control panel no responds from the printer even after pressing switches 5 46
Abnormal paper feeding paper jam occurs page heading position is not right 46
Abnormal printing operation 46
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Error is detected led indicates error 2 46
Figure 3 2 flowchart 1 46
No led goes on printer mechanism does not operate at all 1 46
Paper feeding is not performed correctly 46
Printer does not operate 46
Printing is not performed bad printing quality abnormal printing 3 46
Symptom cause flow chart 46
Table 3 4 symptoms and corresponding flow chart 46
This section contains the flow charts which are used to isolate the faulty unit by following the flow chart according to the problem caused during replacing or repairing the unit you are to identify the faulty unit based on the primary symptom listed in the table3 4 after this refer to 3 unit repair and find and replace the defective parts 46
Troubleshooting unit level troubleshooting 41 46
Unit level troubleshooting 46
Abnormal printing operation 47
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Error is detected 47
Figure 3 3 flowchart 2 47
Figure 3 4 flowchart 3 47
Troubleshooting unit level troubleshooting 42 47
Abnormal control panel 48
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Figure 3 5 flowchart 4 48
Figure 3 6 flowchart 5 48
Paper feed operation is not performed correctly 48
Troubleshooting unit level troubleshooting 43 48
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Table 3 5 repair of the power supply board table 3 6 repair of the power supply board 49
This section describes the problems related to the power supply board the table below provides various symptoms likely causes and checkpoints the checkpoints refer to waveforms resistance and other values to check to evaluate the operation of each component 49
Troubleshooting unit repair power supply board 44 49
Unit repair power supply board 49
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Repair of the control board 50
Table 3 7 repair of the control board table 3 8 repair of the control board 50
This section describes the problems related to the power supply board the table below provides various symptoms likely causes and checkpoints the checkpoints refer to waveforms resistance and other values to check to evaluate the operation of each component 50
Troubleshooting repair of the control board 45 50
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Table 3 9 repair of the control board 51
Troubleshooting repair of the control board 46 51
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Table 3 10 repair of the printer mechanism 52
Table 3 11 repair of the printer mechanism 52
This section provides instruction for repairing mechanism it describes various problems symptom likely causes checkpoints and solutions select appropriate symptom from the the table and check each parts and its function as describes in the checkpoint 52
Troubleshooting unit repair printer mechanism 47 52
Unit repair printer mechanism 52
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Table 3 12 repair of the printing mechanism table 3 13 repair of the printing mechanism 53
Troubleshooting unit repair printer mechanism 48 53
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Table 3 14 repair of the printer mechanism table 3 15 repair of the printer mechanism 54
Troubleshooting unit repair printer mechanism 49 54
Disassembly and assembly 55
Overview 56
Precautions 56
Disassembly and assembly overview 52 57
Epson stylus photo 750 revision a 57
If any service is made to the printer use the checklist shown below to confirm that all works are completed properly and the printer is ready to return to the user 57
Table 4 2 check list 57
Table 4 3 check list 57
Work completion check 57
Disassembly 58
Disassembly and assembly disassembly 53 58
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Figure 4 1 flowchart 58
The flowchart below shows step by step disassembly procedures 58
Housing removal 59
Circuit boards removal 60
Control panel removal 62
Absorber tray assembly a removal 63
Print head removal 64
Printer mechanism removal 64
Pump assembly cap assembly removal 66
Motor assembly cr removal 68
Motor assembly pf removal 69
Asf assembly removal 70
Paper feed roller assembly removal 71
Roller assembly ld left right removal 72
Carriage assembly removal 73
Pe sensor assembly removal 75
Roller assembly pf removal 76
Hp sensor removal 78
Cartridge sensor sensor i c removal 79
Adjustment 81
Adjustment overview 77 82
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Note o required adjustment na not applicable 82
Overview 82
Required adjustment 82
Table 5 1 lists all the necessary adjustments for this printer if any service listed in this table is carried out all adjustments corresponding to that service should be performed to ensure proper operation of the printer 82
Table 5 1 required adjustment 82
This section describes the procedure for adjustments required when the printer is disassembled and assembled for repair 82
Adjustment 83
Paper gap adjustment 83
Adjustment by adjustment program 85
Adjustment program 85
How to use the adjustment program 85
Setting destination information 87
Head voltage id adjustment 88
Head angular adjustment 89
Bi d adjustment 91
Head cleaning 92
Initial ink charge 93
Counter value for ink absorber 94
Protect counter reset 94
Protect counter value 94
Maintenance 95
Cleaning 96
Overview 96
Service maintenance 96
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Lubrication 97
Maintenance overview 92 97
Never use oil and the grease other than those specified in this manual use of different types of components can damage the component or give bad influence on the printer function never apply larger amount of lubricate than specified in this manual 97
Table 6 1 specified lubricants 97
Table 6 2 lubrication point 97
The type and amount of oil and grease used to lubricated the printer parts are determined based on the results of internal evaluations therefore be sure to apply the specified type and amount of oil and grease to the specified part of the printer mechanism during servicing 97
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Maintenance overview 93 98
Table 6 3 lubrication point table 6 4 lubrication point 98
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Maintenance overview 94 99
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Maintenance overview 95 100
Appendix 101
Appendix connector summary 97 102
Connector summary 102
Control board c259 main or c264 main 102
Control panel c209pnl 102
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Figure 7 1 connection of the major components 102
Major component unit 102
Major component unit of this printer is as follows 102
Power supply board c257 psb c257 pse 102
Printer mechanism m 4m11 102
Table 7 1 connector summary for c259main 102
Table 7 2 connector cn4 102
The figure below shows how these components are connected 102
Appendix connector summary 98 103
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Table 7 3 connector cn5 103
Table 7 4 connector cn6 103
Table 7 5 connector cn7 103
Table 7 6 connector cn8 103
Table 7 7 connector cn9 103
Appendix connector summary 99 104
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Table 7 10 connector cn11 104
Table 7 8 connector cn9 table 7 9 connector cn10 104
Component layout 105
Appendix exploded diagram 102 107
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Exploded diagram 107
Exploded diagram for epson stylus photo 750 1 3 107
Figure 7 6 exploded diagram 1 107
Following pages shows exploded diagram of stylus photo 750 107
Appendix exploded diagram 103 108
Epson stylus photo 750 revision b 108
Exploded diagram for epson stylus photo 750 2 3 108
Figure 7 7 exploded diagram 2 108
Appendix exploded diagram 104 109
Epson stylus photo 750 revision b 109
Exploded diagram for epson stylus photo 750 3 3 109
Figure 7 8 exploded diagram 3 109
Electric circuit 110

Epson Stylus Photo 750 Сервис мануал онлайн

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