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Epson 810, 820, 830 2.2.2.5 Reset Circuit, 2.2.2.6 EEPROM Control Circuit, Figure 2-23.EEPROM circuit diagram, Figure 2-22.Reset circuit block diagram

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EPSON Stylus PHOTO 810/820/830

Revision B

2.2.2.5 Reset Circuit

Reset IC (IC2) on the MAIN board monitors the two voltage: +5V for the logic line and +42V for the drive line. Reset IC outputs the reset signal to CPU (IC1) in the following case.

1.When the printer power is turned on and reset IC detects 4.2V on +5V line/36.3V on +42V line, reset signal is output to perform the initialize operation correctly.

2.When the printer power is turned off and reset IC detects 4.2V on +5V line/36.3V on +42V line, reset signal is output to stop the printer operation safely.

3.When reset IC detects 4.2V on +5V line/36.3V on +42V line with fail during the printer operation, reset signal is output to stop the printer operation safely.

2.2.2.6 EEPROM Control Circuit

When the printer power is turned off, the following information is stored in EEPROM (IC3) which is nonvolatile memory. And, when the printer power is on, CPU (IC1) reads the information from EEPROM.

Information stored in EEPROM is listed below.

Various ink counter (I/C consumption counter, waste pad counter, etc.)

Mechanical setting value (Head ID, Bi-D adjustment, USB ID, etc.)

Refer to 7.1.2 that provides the detailed information stored in EEPROM.

Unlike the previous products, the timer IC is not built in the reset IC and the Lithium battery is not mounted on this Main board either.

.

+42V							+5V
							+5V

			IC2
			IC2							IC1
		BH6150F-E2					38			E01A24CA
		BH6150F-E2								E01A24CA
1					8

	NC1		MEWS					MRES
2	NC1		MEWS		7			MRES
2	IN		VCC		7
	IN		VCC				37
3	NC2		OUT1 6				37	NMI
4	GND		OUT2 5				36	RESET
	GND		OUT2 5				36	RESET

+5V EEPROM-93C (IC3)

	8						1	42
	8			VCC	CS		1	42
		7		NC	SK	2		41
	6			ORG	DI	3		40
	5			GND	DO	4		39
	5			GND	DO	4		39

E01A24CA

(IC1)

C-P20

C-P21

C-P22

C-P23

Figure 2-22. Reset circuit block diagram

Main line for reset IC has the following function.

	OUT1:	Interrupt signal
	OUT2:	Reset line
	IN:	+42V line monitoring line
	VCC:	+5V line monitoring line

Figure 2-23. EEPROM circuit diagram

EEPROM is connected to CPU with 4 lines and each line has the following function.

	CS:	Chip selection signal
	CK:	Data synchronism clock pulse
	DI:	Data writing line (serial data) at power off.
	DO:	Data reading line (serial data) at power on.

Operating Principles

Electrical Circuit Operating Principles

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Contents

EPSON Stylus PHOTO 810/820/830 Notice PRECAUTIONS About This Manual Revision Status PRODUCT DESCRIPTION Operating Principles Troubleshooting Disassembly and Assembly Adjustment Maintenance Appendix PRODUCT DESCRIPTION 1.1 FEATURES 1.2 SPECIFICATIONS Plain Paper 1.2.4.2 Envelope 1.2.4.3 Exclusive paper Page Cut Sheet 1.2.5.2 Envelopes 1.2.6.1 Black Ink Cartridge 1.2.6.2 Color Ink Cartridge [UPS Version] (Stylus Photo 820/830) 1.2.8 Environmental Condition Humidity (%) Temperature (°C) Figure 1-7.Temperature/Humidity range 1.2.9 Reliability 1.2.10 Safety Approvals [220∼ 240V Version] (Stylus Photo 810/820) 1.2.11 Acoustic Noise 1.2.12 CE Marking 1.3 INTERFACE Table 1-11.Typical time of tack Table 1-13.Connector pin assignment and signals Table 1-12.Signal level: TTL compatible (IEEE-1284level 1 device) Table 1-13.Connector pin assignment and signals (continued) NOTE: 1.3.2 Parallel Interface (Reserve Channel) Table 1-14.Connector pin assignment and signals Table 1-14.Connector pin assignment and signals (continued) „ Stylus Photo 810/820 „Stylus Photo 820/830 1.3.3 USB Interface Table 1-15.Connector pin assignment and signals Pin #2 Pin #1 Pin #3 Page 1.4 PANEL CONTROL Power Error reset Ink cartridge exchange 1.4.3 Printer Condition and Panel Status Table 1-18.Printer condition and LED status 1.4.4 Error Status †Ink end error †Paper out error 1.4.5 Printer Initialization OPERATING PRINCIPLES 2.1 Overview 2.1.2 Printhead Figure 2-2.Nozzle layout for Stylus Photo 810/ 820/830 Figure 2-3.Printhead sectional drawing 2.1.2.1 Printing Process 2.1.2.2 Printing Method 2.1.3 Carriage Mechanism Figure 2-5.Carriage mechanism (Top view) Table 2-1.Carriage motor specification Figure 2-6.CR home position detection 2.1.4 Paper Loading/Feeding Mechanism Table 2-2.PF motor specifications Table 2-3.ASF unit function & PF motor rotational direction Figure 2-7.Paper loading/feeding mechanism 2.1.4.1 Paper Loading Mechanism (ASF unit) Figure 2-8.ASF paper loading sequence (Step 1, 2) Figure 2-9.ASF paper loading sequence (Step 3, 4) 2.1.4.2 Paper Feeding Mechanism 2.1.5.1 Capping Mechanism Capping position (CR home position) Wiper setting position Wiping position Released position (Bottom position) Figure 2-12.Wiper mechanism 2.1.5.2 Pump unit mechanism 2.1.6 Ink Sequence Page 2.2 Electrical Circuit Operating Principles 2.2.1.1 C417 PSB/PSE board Page 2.2.1.2 C482 PSH board Page 2.2.2C417/C418 Main/Main-BBoard 2.2.2.1 Main Elements 2.2.2.2 Printhead Driver Circuit 2.2.2.3 PF Motor (PF/ PUMP/ ASF Motor) Driver Circuit 2.2.2.4 CR Motor Driver Circuit 2.2.2.5 Reset Circuit 2.2.2.6 EEPROM Control Circuit 2.2.2.7 Sensor Circuit 2.2.3 C483/C484 MAIN-BBoard Table 2-9.3.3VDC drive chips & 5VDC drive chips Figure 2-25.Block diagram for the C483/C484 Main-Bboard 2.2.3.1 Main Elements 2.2.3.2 Printhead Driver Circuit 2.2.3.3 PF/CR Motor Driver Circuit 2.2.3.4 Reset Regulator Circuit 2.2.3.5 EEPROM Control Circuit 2.2.3.6 Sensor Circuit TROUBLESHOOTING 3.1 Overview 3.2Troubleshooting with LED Error Indications and Status Monitor 3 Message Page Page Stylus Photo Revision B Page 3.3 Unit Level Troubleshooting Table 3-5.Check point for the fatal error according to each phenomenon EPSON Stylus PHOTO 810/820/830 Table 3-6.Paper jam error condition and possible cause Table 3-7.Check point for the paper jam error according to each phenomenon Page Page Table 3-7.Check point for the paper jam error according to each phenomenon Table 3-8.Paper out error condition and possible cause Table 3-9.Check point for the paper out error according to each phenomenon Table 3-9.Check point for the paper out error according to each phenomenon Page Table 3-10.Communication error condition and possible cause Table 3-11.Check point for the communication error according to each phenomenon Page Table 3-14.Multiple papers are always loaded without LEDs and STM3 Table 3-16.Abnormal noise Table 3-17.Check point for the abnormal noise Table 3-18.Poor printing quality Page Table 3-19.Check point for the poor printing quality Page Page Page Page DISASSEMBLY AND ASSEMBLY 4.1 Overview 4.1.3Screws 4.1.4 Work Completion Check Table 4-3.Work Completion Check 4.2Difference on Printer Machanism between SP810/820 and SP820/830 †If other I/C is installed on Stylus Photo 810/820/830, the printer detects ink end error 4.2.1 Caution in reassembling to ink leakage problem 4.3 Disassembly 4.3.1 Upper housing removal Figure 4-4.Edge guide setting position for the Lower housing removal † Make sure that the Edge guide is in the cutout portion of the Upper housing Figure 4-5.Hooks position of the Upper housing Figure 4-6.Protrusion position of the Upper housing †Do not damage the protrusion by the precision screwdriver (-) †When assembling the Upper housing to the printer 4.3.2 Printhead removal Figure 4-7.Head FFC holder removal Figure 4-8.Printhead removal Figure 4-9.Printhead installation position (pin & the grounding plate) Figure 4-10.Head FFC setting position 4.3.3 CR unit removal Figure 4-11.CR timing belt removal Figure 4-12.Compression spring 19.6 removal Figure 4-13.CR guide shaft rod spring release † In this step, you cannot remove the left CR guide shaft rod spring Figure 4-14.CR unit removal †Remove the CR guide shaft while holding the CR unit by hand. If Paper guide front, which causes the dot missing problem † Unlike the previous printer (Stylus COLOR 680), the oil pad is not built in the CR unit Figure 4-16.Grounding plate assembling position Figure 4-17.CR guide shaft rod spring setting procedure 4.3.4 CR motor removal 2)1st dot position adjustment †When assembling the CR motor to the Main frame Figure 4-18.CR motor assembling Tightening torque for the CR motor hexagon nut is as follows 4.3.5 ASF unit removal Figure 4-19.Screw position for removing the ASF unit Figure 4-20.Compression spring 2.50 and the Hopper removal Figure 4-21.Torsion spring 29.1 setting position Figure 4-23.ASF fixing screws fastening order Figure 4-22.Hopper pad and LD pad setting position 4.3.6 PSB/PSE unit removal Figure 4-24.PSB/PSE unit removal Figure 4-25.Upper power supply board shield plate removal Figure 4-26.Power supply board removal „Make sure to install the Power supply board correctly Figure 4-27.Tightening procedure for the PSB/PSE board •C.B.(O). SCREW, 4x5, F/Zg (1 pcs) : 11 ± 1 kgf.cm •C.B.S. SCREW, 3x6, F/Zn (2 pcs) : 6 ± 1 kgf.cm •C.B.S-TITESCREW, 3x6, F/Zn (1 pcs) : 6 ± 1 kgf.cm Figure 4-29.Power supply board shield plate setting position 4.3.7 Holder shaft unit removal Figure 4-30.Head FFC removal Figure 4-31.LD roller shaft holder removal Figure 4-32.LD roller with Clutch mechanism removal Figure 4-33.HP/PE sensor removal †When assembling the HP/PE detection lever to the LD roller shaft holder Figure 4-34.Torsion spring 0.22 for each detection lever „Make sure that the HP/PE detection lever moves smoothly †When assembling the HP/PE sensor to the LD roller shaft holder Figure 4-36.Clutch assembling Figure 4-37.Spur Gear 35.2 and Combination gear Figure 4-38.LD roller shaft holder assembling procedure (1) Figure 4-39.LD roller shaft holder assembling procedure (2) 4.3.8 Circuit board removal Figure 4-40.SW button removal Figure 4-41.Circuit board removal Figure 4-42.Hooks on the M/B mounting plate Figure 4-43.Main board shield plate removal Figure 4-44.Circuit board assembling Page 4.3.9 Waste drain ink pad (under the ASF unit) removal Figure 4-45.Waste drain ink pad setting position Figure 4-46.Ink tube setting position 4.3.10 Lower housing removal (home position side) Figure 4-48.Paper eject roller sliding procedure †Do not damage the Spur gear 60 when sliding the Paper eject roller to the left side Figure 4-49.Printer mechanism removal (1) Figure 4-50.Cap unit removal Figure 4-51.Cap unit setting position † Do not touch the sealing rubber portion and the cleaner head of the Cap unit when inserting the Cap unit to the Main frame Figure 4-52.Printer mechanism removal (2) Figure 4-53.Printer mechanism removal †When lifting the Printer mechanism from the Lower housing, be †When assembling the Printer mechanism to the Lower housing Figure 4-54.Reinforcing plate setting position Figure 4-56.Printer mechanism assembling(2) Figure 4-58.Bush position of the Paper eject roller Figure 4-57.Ink tube setting position Page 4.3.12Ink system unit removal (Cap unit, Pump unit & Waste drain ink pad) Figure 4-59.Cap unit removal Figure 4-60.Ink system unit removal position Figure 4-61.Ink system removal procedure †When removing the Ink system unit, be careful so that the gears do not come off from each shaft of the Ink system frame † When getting out of the ink tube, check the marking on the ink tube in advance Figure 4-62.Marking position on the Ink tube Figure 4-64.Gear engagement on the Ink system frame Figure 4-65.Compression spring 1.764 setting position 4.3.13 PF roller unit removal Figure 4-66.Paper guide removal procedure (1) † When removing the Paper guide upper/left, avoid to damage the figure below Figure 4-67.Paper guide removal procedure (2) Figure 4-71.Paper guide assembling (2) Figure 4-70.Paper guide assembling (1) Figure 4-72.Paper guide assembling (3) 4.3.14 PF motor removal Figure 4-73.PF motor removal † When removing the PF motor, do not damage the pinion gear of the PF motor with the Main frame †When assembling the PF motor to the Main frame ADJUSTMENT 5.1 Overview Page MAINTENANCE 6.1 Overview Figure 6-1.Status monitor 3 indication Figure 6-3.Maintenance error indication in STM3 Figure 6-2.Head cleaning function in the printer driver utility 6.1.3 Lubrication „Never use oil or grease other than those specified in this „ Never apply larger amount of grease than specified in this manual Table 6-1.Specified lubricants Table 6-2.Lubrication point 30 mm Figure 6-4.Lubrication point Figure 6-6.Lubrication point 3 (1) 20 mm Figure 6-5.Lubrication point Page APPENDIX 7.1 Connector Summary Table 7-4.CN4 - HP/PE Sensor (Stylus Photo 810/820) Table 7-5.CN4 - HP/PE sensor (Stylus Photo 820/830) Table 7-6.CN7 - PF Motor (Stylus Photo 810/820/830) Table 7-7.CN8 - Printhead (Stylus Photo 810/820/830) Table 7-8.CN9 - Printhead (Stylus Photo 810/820/830) Table 7-9.CN12 - CR Motor (Stylus Photo 810/820/830) 7.1.2 EEPROM Address Map Table 7-10.EEPROM Address Map (Stylus Photo 810/820) Table 7-10.EEPROM Address Map (Stylus Photo 810/820) (continued) Name mode Customer name Parallel Table 7-11.EEPROM Address Map (continued) Table 7-12.EEPROM address map (Stylus Photo 820/830) Page Table 7-13.EEPROM Address Map (continued) Page 7.2 Component Layout Page 7.3 Exploded Diagram Page Page Page Page Page Page Page Page Page Page 7.4 Parts List Table 7-14.Stylus PHOTO 810/820 Parts List <Stylus Photo 820/830 Table 7-15.Stylus Photo 8120/830 parts list Table 7-15.Stylus Photo 8120/830 parts list 7.5 Electrical Circuits