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Epson ES-1200C Pro PC, Service Manual

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Epson ES-1200C Pro PC Service Manual Download Page 75

Troubleshooting

 

 

5.4 REPAIR OF THE POWER 

SUPPLY BOARD

This section provides instructions for repairing a defective power supply board. Servicers 

who do

not 

repair to the component level (including all servicers in the US.) can ignore this section.

This table describes various problems, 

 causes, checkpoints, and solutions. The 

column provides proper waveforms, resistance values, and other values to be checked to evaluate
the operation of any component that might be bad. Check these values and take the appropriate

action.

Table 5-14. Repair of the Power Supply Board

Rev. 

 .’

 .

Summary of Contents for ES-1200C Pro PC

Page 1: ...MANUAL DE SERVIÇO SCANNERS GT9000 ES 1200C robot ieg com br Esquemas em Cd Rom Monitores Impressoras Televisores Áudio Scanners Etc ...

Page 2: ...EPSON IMAGE SCANNER GT 9000 ES 1200C SERVICE MANUAL EPSON ...

Page 3: ... this manual However should any errors be detected SEIKO EPSON would greatly appreciate being informed of them The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in this manual or the consequence thereof Epson is registered trademark of Seiko Epson Corporation GeneraZ Notice Other product mmes used herein are for identication purposes only and maybe trademarks of the...

Page 4: ...S MANUAL DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS WARNING REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLT AGE LISTED ON THE SERIAL NUMBER R...

Page 5: ...n components of the scanner CHAPTER 2 OPERATING PRINCIPLES Describes the theory of scanner operation CHAPTER 3 DISASSEMBLY AND ASSEMBLY Includes a step by step guide for product disassembly and assembly CHAPTER 4 ADJUSTMENTS Includes a step by step guide for adjustment CHAPTER 5 TROUBLESHOOTING Provides Epson approved techniques for adjustment CHAPTER 6 MAINTENANCE Describes preventive maintenance...

Page 6: ...REVISION SHEET Revision Issue Date Revision Page Rev A June 29 1994 let issue o j c1 v ...

Page 7: ...TABLE OF CONTENTS CHAPTER 1 PRODUCT DESCRIPTION CHAPTER 2 OPERATING PRINCIPLES CHAPTER 3 DISASSEMBLY AND ASSEMBLY CHAPTER 4 ADJUSTMENTS CHAPTER 5 TROUBLESHOOTING CHAPTER 6 MAINTENANCE APPENDIX vi ...

Page 8: ...SCSl status 1 3 2 4 SCSI Messages 1 3 2 5 SCSI PinAssignrnents 1 5 1 7 1 7 1 8 1 8 1 9 1 9 1 4 BUITONS AND INDICATORS 1 1o 1 5 SELF TEST 1 1o 1 6 ERRORS 1 11 1 7 DATA TRANSMISSION PROTOCOL 1 12 1 7 1 Handshaking Control Codes 1 7 2 Data Block Handshaking Procedure 1 7 3 Data Block Formats 1 7 3 1 LineData Format 1 7 3 2 Block Data Format 1 7 4 Format of Status Byte 1 8 SCANNER FUNCTIONS 1 8 1 1 8 ...

Page 9: ...o Scanner 1 5 Data Transmission Timing Scanner to Host 1 5 Buttons and Indicators Location 1 10 Control Codes without Parameters 1 12 Control Codes with Parameters 1 12 Scanner Data Request and Monochrome Reading 1 13 Color Reading Page Sequence Mode 1 13 Color Reading Line Sequence Mode 1 14 Line Data Format 1 14 Block Data Format 1 14 Status Byte 1 16 zoom 1 18 Reading Area 1 19 Brightness 1 21 ...

Page 10: ...function available Software command level ESC I B4 See note2 Compatible with GT 6500 ES 600C and GT 8000 ES 800C GT 6000 ES 300C emulation See note3 Available options Automatic document feeder ADF and transparency unit Notes 1 SCSland bidirectional paral el interfaces can be connected to two computers simf dtaneously with the fo owing exceptions 1 If the scanner receives the ESC G command from one...

Page 11: ...ncy unit B80801 Bidirectional parallel interface board for IBM PC B880081 SCSI Syatem cable 25 pinto 50 pin B880091 SCSI peripheral cable 50 pin to 50 pin 1380818 EPSON Scanning Safari for Macintoeh B80619 EPSON Scanning Safari for WIndowe B80820 EPSON Scan II for Macintoeh English Mm25 EPSON Scan II for WIndowe Engliah The number represented by an asterisk varies by country 4 9 1 2 Rev A ...

Page 12: ...ox 16 rnsec line Color line sequence Approx 7rnsec line By light source green red blue Esc I B4 50YOto2009 0 in 1 40 steps 8 bits pixel 3 bi level modes A B C 4 dither modes 2 user specified modes 2 CRT levels 3 printer levels 1 userdefined level Impact dot thermal ink jet printer CRT display user defined 7 levels Bidirectional parallel SCSI two 50 pin comectors Noble gas fluorescent lights UL CSA...

Page 13: ... Dust Ordinary office or home conditions Avoid placing in an extremely dusty environment Illumination Avoid operation under direct sunlight or near a strong light source 1 2 6 Documents Refractive type Documents with smooth surfaces such as printing and photographs 1 2 7 Size of Original for Scanning Dimensions 216 mm 8 64 inches horizontal x 297mm 11 88 inches vertical 216 mm 8 64 inches 4 A orig...

Page 14: ...type Data transrni sion timing Pin assignments Parallel Interface Bidirectional parallel interface 8 bit parallel By STROBE pulse By BUSY ACKNLG pulse Input output data and interface control signals are TT L level compatible 36 pin 57 30360 Amphenol or equivalent See Figures 1 3 and 1 4 See Table 1 3 STROBE BUSY ACK DATA DIR 0 5 pa typical 1 0 5 p minimum J 0 5 pa minimum 4 I N Figure 1 3 Data Tra...

Page 15: ...dy to accept mom data When this signal is HIGH the scanner cannot receive data The signal beoomes HIGH 11 BUSY o 1 during data entry 2 during scanning 3 when the scanner is not ready 4 when the scanner has an error 12 15 NC Not used 16 GND Logic ground level 17 C GND Scanner chassis ground 18 NC Not used 19 30 GND Twisted pair return signalground level When this signal level becomes LOW the scanne...

Page 16: ...er is fixed to O in this device The Command Link Function is not suppotted 5 Data phase Data in phase Data out phase 6 Status phase 7 Message phase Message in phase Message out phase 8 Attention condition 9 Reset condition Logic level TTL compatible Electrical standard ANSI standard X3 131 1986 Terminator Internal terminator turned on or off by the switch ID settings The SCSI ID is set with a rota...

Page 17: ...nlyfhe extenwon sense okta fonnatis su xxtedf orsense data returned by the sense request command Inquity data is as fallows Peripheral device type 03H processorj RMB WH non removable media Device type restriction H ISO version ECMA version ANSI ve ion OIH current version Additional length 23H Vendor unique parameter bytes oOH OOH OOH EPSON 20H SCANNER 20H GT xxxx OOH OOH OOH FFH GT XXXX product na...

Page 18: ... Identifv I 80H FFH I In out I No I 1 3 2 5 SCSI Pin Assignments Table 1 6 Pin Assignments for the SCSI Pin No Signal Name I o Description 1 12 14 25 35 37 39 40 42 GND Signal ground 13 NC Not USd 26 33 DBO 7 1 0 Data bus O 7 34 DBP 1 0 Data bus pariiy 38 TERMPWR Termination power 5 V 41 ATN I Attention 43 BSY 1 0 Busy 44 ACK I Acknowledge 45 RST I Reset 46 MSG o Message 47 SEL 1 0 Select 48 CID o...

Page 19: ...echanism Procedure for coforp8 sequence m 1 Set the SCSI ID switch on the back of the scanner to 8 2 Turn the scanner on while pressing the RESET button and hold down the RESt3 button until the ERROR and OPERATE LEDs light It takes approximately 10 seconds 3 The scanner starts the color page sequence scanning operation when the RESET buttcm is released 4 After confirming the operation of the scann...

Page 20: ...d then back on Press the RESET button The INIT signal in the parallel interface turns active The RESET signal in the SCSI interface turns active Complete BUS DEVICE RESET message in SCSI None The lamp is broken Power was turned on and the transportation screwhas not been removed System breakdown An error related to an option is detected such as cover open paper arnmin etc J The lamp goes off and t...

Page 21: ...ode received m scanner does not accept the control code cANNERm mm wa i Figure 1 6 Control Code without Parameters Control Codes with Parameters step 1 The host computer sends a control code step 2 The scanner responds ACK 06H Legal mntrol code received w scanner accepts the cxmtml code NACK 15H Illegal mntrol code received 1 lw scanner does not accept the control code Step 3 If the host receives ...

Page 22: ... sends a final data block Note The host computer shou d not send back an ACK 06H after receiving the firxd data b ock The order of the image data is R G Bin ine by ine mode SCANNER HOST Figure 1 8 Scanner Data Request and Monochrome Reading Page Sequence Mode Color Reading Step 1 The host computer sends a control code Step 2 The scanner sends a data block Step 3 The host computer responds ACK 06H ...

Page 23: ... 1 10 Color Reading Line Sequence Mode 1 7 3 Data Block Formats This section describes two data block formats Line data format Consists of a 4 byte information block or a l line image data block Information Block Header Status Bvte Counter DATA STX ST d DATA 1 byte 1 byte 2 byte Figure 1 11 Line Data Format Block data format Consists of a 6 byte information block and n lines of image data The para...

Page 24: ...de 02H The header indicates the beginning of a data block status Refer to Section 1 6 4 Byte counter line The byte counter line indicates the number of bytes of image data per line in the main scanning direction Line counter The line counter indicates the number of lines of image data per color Notes 1 Block data format is available when activating the setline counter command 2 For the color line ...

Page 25: ...ith the status request command ESC F 7he Waning of Each Status Bit Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit O Fatal error flag Set when a system error occurs Reserved Area end flag a For color readins set to 1 for the last data block of a color page b For monochrome readin settol for the lastdata block of the page Option flag When optional equipment is installed set this to 1 Color attribute ...

Page 26: ... each pixel Larger values enable a greater variety of tones or colors In monochrome mode a format setting of 1 bit pixel bi level data provides only two tones black 0 and white l A setting of 2 bits pixel quad level data shows four tone levels corresponding to binary values 00 01 10 and 11 Eight bits pixel provides for 256 shades of gray generating a result that has photographic quality When used ...

Page 27: ... incmmmts Values for main scan and sub scan can beset independently The zoom values determine the vertical and horizontal lengths of the image If the zoom is set to 100 9 the image is scanned at actual size If the zoom is set to 200 for both main scan and sub scan the image is magnified to four times the original size If the zoom is set to 50 0 for both main scan and sub scan the image is reduced ...

Page 28: ...es color scanning or monochrome black and white scanning In color scanning you can choose either page sequence mode or line sequence mode In monochrome scanning you can also specify a dropout color Color page sequence mode The scanner scans the document three times to scan green red and blue separately Page sequence mode is faster than line sequence mode Color line sequence mode The seamer scans t...

Page 29: ...ther mode the scanner uses a regular pattern for the same purpose Each mode is outlined below tWftoning Mode A This is the standard halftoning procedure l e smnner converts the image into a hard toned output which maintains image definition This mode is suitable for most purposes Halftoning Mode B The scanner converts the image to a soft toned output This mode is suited for images in which similar...

Page 30: ...t Dot Matrix Printers This setting provides color compensation to match the characteristics of impact dot matrix printers Thermal Transfer Printers This setting provides color compensation to match the characteristics of thermal transfer printers Ink Jet Printers This setting provides color compensation to match the characteristics of ink jet color printers 1 8 8 Brightness The scanner enables you...

Page 31: ...ls exceeding 1 bit pixel color For this mode 22 Printer Output A This setting is suitable for high density e g 24 dot printers The image is lightened to compensate for the higher darker density generated by these printers If this mode is used to output the image to a CRT the image will appear t nt Printer Output B This setting is suitable for low density such as 8 dot 9 pin printers and for page p...

Page 32: ... removal and replacement The main components are Cl B027 MAIN board Main control circuit Cl B027 PSB BU27 PSE board Power supply circuit Cl B0271 F board Interface board Cl Carriage assembly scanner head Cl Lower case with scanner mechanism D Upper case D Document cover B027 carriage Assembly B027 l F MAIN Board Board Figure 1 18 GT 9000 ES 1200C Component Layout Rev A 1 23 ...

Page 33: ...array are assigned to the memory space Memory ICS IM bit program ROM IM bit PSRAM IM bit SRAM 256K bit SRAM 64K bit SRAM Gate Arrays E02A03 E02A08 E02A11 E02A05 E02A13 E02A12 Drivers IC15 Ic16 17 IC13 IC4 5 9 11 IC7 8 6 12 IC1 IC1O IC2 IC3 IC24 IC23 CR motor stepping motor driver TA789P IC18 19 Others SCSI controller 53CF96 IC21 SCSI terminator BH9590FP IC25 TA789P IC18 19 IM PS RAM IC16 17 h EO2A...

Page 34: ...type Figure 1 20 B027 PSB PSE Power Supply Board 1 9 3 B027 UF Board The B027 I F board contains interface circuit connectors for SCSI and optional unit and terminator switch and SCSI ID switch Figure 1 21 B027 l F Board 1 9 4 Carriage Assembly Scanner Head The carriage assembly scanner head is a 600 dpi CCD charge coupled device line sensor This unit has OP amplifier and 10 bits A D converter It ...

Page 35: ... case includes the scanner mechanism compments Among these componenk are the carriage motor the carriage mechanism the home position sensor and the scanner head Hgure 1 23 Lower Case with Scanner Mechanism 1 9 6 Upper Case The upper case includes the document glass Figure 1 24 Upper Case 1 26 Rev A ...

Page 36: ...ection 2 2 Arrangement ofPhotosensors 2 2 Operations of the Transmission Section 2 3 Reading ofan Original Document 2 4 Carriage Operations 2 4 Power Supply Circuit Block Diagram 2 6 Control Circuit Block Diagram 2 7 Figure2 10 Outline of GT 9000 ES 1200C Operation 2 8 Figure2 11 Block Diagram of Reset Circuit 2 10 Figure2 12 Block Diagram ofHome Position Sensor Circuit 2 10 Figure2 13 Block Diagr...

Page 37: ...e display To read individual colors the scanner illuminates the original document separately with each color of light The green lamp is the light source for reading the green component the red lamp is for reading the red component the blue lamp is for reading the blue component The operation of the CCD image sensor is divided into the three blocks shown and described below Light 1 Photosensitive S...

Page 38: ...of capacitance Light reflected from the original document impacts the photodiode which converts the energy into a corresponding amount of ektric current The resulting electric currmt causes the MOS capaator to accumulate electrons m numbers proportional to the strength of the origimlly received light esq ii When the shift electrode goes on the electrons accumulated in the MOS capaator are released...

Page 39: ...mission pulse 2 goes ON signal charges move to the capacitor at their right The charge that exists in the A A right most capacitor is transmitted to the output section and then to the main board J5E T 16 T Q II When transmission pulse 4 2 goes OFF the TAJZJ condition of the section becomes stable L j w VI When transmission pulse goes ON charges again move to the capaator at their Txzz right c k m ...

Page 40: ...rmed by reading one line at a time moving in the vertical direction The operation is illustrated in Figure 2 6 Second Line Signal Pixel First Line Sub scan head movement direction m Scanner Head Figure 2 6 Reading of an Original Document The carriage mechanism moves the scanner head A timing belt is inserted into the base of the carriage The carriage motor a stepping motor drives the timing belt b...

Page 41: ...oard Rated Input Voltage Range VAC Fuse F1 Ratings Output Voltages 100 120 B027 PSB 2 5A 1125V 85 138 24 VDC 1 OA 5 VDC 1 OA 220 240 B027 PSE 1 25A 1250V 12 VDC l A 187 276 2 2 1 Power Supply Overview The power supply board has two power output lines that supply power to the various control circuits and d i e mechanisms Table 2 2 lists the parts of the s er that run off these four DC output supply...

Page 42: ...ndary circuitry while the scanner remains plugged into the external AC supply mrrent continues to flow in the primary arcuitry whether the power supply switch is turned off or on For this reason before you perform any maintenance work you must unplug the seamer from the external AC power outlet Second there are three circuits to protect the supply arcuitry and avoid danger The 5 VDC line contains ...

Page 43: ...e gate arrays Figure 2 9 is a block diagram of the control circuitry Scanner Head CCD AMP AID Convertor Lamp I 256K 64K d Image RAM Data IC4 5 7 8 I Gate Array E02A03 ICI CCD Lamp Control w t Gate Array CPU E02A13 M37720S1AFP Gate Array 4 IC24 IC14 E02A12 IC23 L A T Motor Driver IC18 19 1 256K 64K RAM IC96 Gate Array E02A08 Iclo 256K 64K RAM Icll 12 Gate Array E02A11 IC2 IM RAM 1 M ROM 53CF98 IC16...

Page 44: ...main board Shading correction is applied to the lo bit digital data The white and black standards read in steps 1 and 2 above determine the shading correction Shading Correcta on Ihe image data sent out by the sensors is derived by direct photoelectric conversion of the reflected light that impacts the sensors This data must be further mnverted before it can be output from the device e g before it...

Page 45: ...4K RAMs E02A08 This gate array performs the following function Gate Array Iclo Color correction The gate array is connected to an external 256K and a 64K RAM E02A11 This gate array performs the following function Gate Array IC2 Zoom The gate array is connected to an external 256K and a 64K RAM E02A05 This gate array performs the following function Gate Array IC3 Halftoning The gate array is connec...

Page 46: ...to reset the scanner When the RESET button is pressed the IWION signal is input to gate array E05A13 pin 1 ON port to output the reset signal also Reset switch CN7 pin 3 J INIT signal for 9 fwallal IF CNll 5V B Resat IC M51953BFP IC26 RSTON INIT POWRST RSTOUT RESET 6 Cilf E02A13 IC24 Figure 2 11 Block Diagram of Reset Circuit 2 3 3 Home Position Sensor Circuit The home position sensor detects whet...

Page 47: ... can be rotated in reverse by reversing the excitation sequence given in Table 2 5 There are 16 drive speeds including stopped The drive speed is established by the drive current which is determined by the combination of 1 2 4 and 8 Carriage A Motor A B B IN A P44 IN B 4 P45 Cpu A TA7289P 8 4 p5 3 M37720S1AFP IC18 4 4 P52 IC14 B 2 P51 1 P50 IN A 4 P46 IN B P47 A TA7289P 8 4 P57 B IC19 4 4 P56 2 4 ...

Page 48: ...he image data output by the image sensor is in the form of an analog signal This signal is passed through an amplifying arcuit The analog signal output from the amplifier is passed into the lo bit A D converter and converted into 10 bit digital data This data is sent to gate array E02A03 IC1 Details of subsequent image processing may be found in Section 2 3 1 The original document must be illumina...

Page 49: ...Effective pixel signals signals 4 L A hA b Single line output period 4 b Figure 2 16 Image Sensor Control Process Connector CN3 m Scanner Head Fluorescent Lamps Optional Transparency unit Fluorescent Lamps LMPI 3 LMPG FVB P04183185 Gate Array E02A13 IC24 Gate Array E02A03 Icl Figure 2 17 Lamp Control Circuit Block Diagram Rev A 2 13 ...

Page 50: ...ge Assembly 3 15 List of Figures Figure3 1 Loosen the Transportation Screw 3 1 Figure 3 2 Replacing the ROM 3 4 Figure3 3 Removing the Uppercase 3 5 Figure 3 4 Removing the Carriage Assembly 3 6 Figure3 5 Removingthe Bottom Plate 3 7 Figure 3 6 Removing the B027 PSB PSE Board 3 8 Figure 3 7 Removing the B027 MAIN Board with the B027 l F Board 3 9 Figure 3 8 Removing the B027 MAIN Board and B027 l ...

Page 51: ...conday circuity As a result the printer still remains live with current flowing even this switch is off Carefully read the following before beginning disassembly or assembly work Figure 3 1 Loosen the Transportation Screw Before disassembling the machine or checking operation first loosen the thumb screw at the rear of the unit If you are returning the unit to a customer attach the thumb screw 3 1...

Page 52: ...d Pan head acrew CB screw Croaa receeeed Binding head acrew 1 CBB tite screw I Croaa recessed Binding head B titescrew CBS tite screw I Croaa receseed Binding head S titescrew CBA LAMITITE screw Crosa receaaed Binding head A4JWTITE acrew CPS tite S Pl screw Croes receaed Binding head S tite acrew with Spring waeher and Plane washer 1 Table 3 3 Screw Types and Abbreviations Head Top Gross recessed ...

Page 53: ...essary mechanism Operation Self test Normal Page sequence Monochrome Checked Not necessary Imaging IS image feed peflormed nor W W chwk Not n e fy feeding utility software Function ROM version The ROM version is Checked Not necessary enhancement Is the document cover clean Checked Not necessary Cleaning Is the inside of the unit free of dust Checked Not necessary Is the outside of the unit clean C...

Page 54: ...ocedure for installing a mmponent in the scanner is simply the reverse of the procedure for removing that component from the printer no installation description is given 3 2 1 Replacing the ROM 1 Remove the CBA LAMIT ITE M3 x 6 screw fixing the ROMcover to the bottom plate 2 Remove the ROM cover 3 Replace the ROM Y cBA LAMfTlTE M3xf3 w Figure 3 2 Replacing the ROM 3 4 Rev A ...

Page 55: ...emoving the Upper Case 1 Open the document cover and remove the document cover 2 Remove the 2 cosmetic M4 x 3 4 screws and 3 CBB tite M4 x 12 screws fixing the upper case 3 Remove the uppercase Cosmetic Screw 12 cBB M4x12 Figure 3 3 Removing the Upper Case Rev A 3 s ...

Page 56: ...r to Section 3 2 2 2 Remove the harness cover 3 Remove flat cables CN3and CN2 through ferrite cores on the B027MAINboard 4 Remove the CPStite P1 M3 x 6 screw and remove the spring 5 Remove the pulley holder with timing belt from the center rail 6 Lift up the carnage assembly 1 M3x6 Figure 3 4 Removing the Carriage Assembly 3 6 Rev A ...

Page 57: ...e 1 Remove the document cover Refer to Section 3 2 2 2 Remove 9 CBS tite M3 x 6 screws and 4 CBB tite M3 x 10 screws 3 Remove the bottom plate Turn the main unit over onto a soft cloth so that the glass will not be damaged CBS M3X6 3X1O Plate Figure 3 5 Removing the Bottom Plate Rev A 3 7 ...

Page 58: ...e bottom plate Refer to Section 3 2 4 3 Remove 1 CBB tite M4x35 screw 2CBB tite M3 x 10 screws and2CBS tite M3 x6 screws 4 Disconnect the 3 cables on the board and then remove the board Turn the main unit over onto a soj cloth so that the glass will not be damaged IJ CBB M4X35 C s M x cBB rw 0 c7 M3x CBB M3X1O Figure 3 6 Removing the B027 PSB PSE Board 3 6 Rev A ...

Page 59: ...n 3 2 3 3 Remove the bottom plate Refer to Section 3 2 4 4 Discomect comectors CN1 6 7 4 and 8 5 Remove 4 CBB tite M3 x 10 screws 6 Remove 2 CBS tite M3 x 6 screws 7 Remove the B027 MAIN board along with the B027 interface board When you connect the cable to connector CN6 of the B027MAIN board align the red stripe on the cable with pin 4 of CN6 MAIN Board Figure 3 7 Removin the B027 MAIN Board wit...

Page 60: ...t CN1O on the B027 MAIN board 9 Remove 2 CP M3 x 6 screws and 2 mnnector screws 10 Remove the M127 I F board 11 Remove 4 CP M3 x 10 screws 12 Remove the B027 MAIN board 10 LOCK NUT Figure 3 8 Removing the 6027 MAIN B d and B027 I F B d ci I 1 I 3 1o Rev A ...

Page 61: ...move the carriage assembly Refer to Section 3 2 3 Remove the bottom plate Refer to Section 3 2 4 Disconnect comectors CN6 on the B027 MAIN board Remove 3 CBB tite M4 x 12 screws and 3 CBS tite M3 x 6 saews Remove the center rail CBB M4X12 CBS M3X6 A Figure 3 9 Removing the Center Rail Remove 3 CBS tite M4 x 6 saews Remove the motor frame Figure 3 10 Removing the Motor Frame Rev A 3 11 ...

Page 62: ...isassembly and Assembly GT WO ES 1 Servka Manual 10 Loosen the CBS tite M3x 6 screw 11 Remove 2 CB M3 x 6 screws 12 Remove the CR motor CB M3X6 CBS M3X6 A Figure 3 11 Removing the CR Motor S12 Rev A 1 t ...

Page 63: ...or Figure 3 12 Removing the HP Sensor 3 2 9 Removing the LED Board 1 Remove the document cover and the uppercase Refer to Section 3 2 2 2 Remove the carriage assembly Refer to Section 3 2 3 3 Remove the bottom plate Refer to Section 3 2 4 4 Disconnect connector CN4 on the B027 MAIN board 5 Remove the CBS tite M3 x 6 screw 6 Remove the LED board z24 Q LEDBOard CBS M3X6 Figure 3 13 Removing the LED ...

Page 64: ...oard 5 Remove the CBB tite M3 x 10 screw 6 Remove the operate switch Figure 3 14 Removing the Operate Switch 3 2 11 Removing the Reaet Switch 1 Remove thedocument cover and the uppercase Refer to Section 3 2 2 2 Remove thecarriageassernbly Refer to Section 3Q3 3 Remove the bottom plate Refer to Swtion3 2 4 4 Disconnect connector CN70n the B027 MAIN board 5 Remove the CBB tite M3 x 10 screw 6 Remov...

Page 65: ...ge assembly Refer to Section 3 2 3 3 Remove 2 CB M3 x 6 screws and 1 CBStite M3 x 6 screw and then remove the CR cover 4 Remove the 2 CB M3 x 6 screws on the inverter board 5 Remove the inverterboard and discomect all the comectors on the inverter board 6 Remove the lamp CW 3X6 CBS M3X6 W CB M3X6 1I Invertor Board q cl CR Cover Figure 3 16 Disassembling the Carriage Assembly Rev A 3 15 ...

Page 66: ...Chapter 4 Adjustments No Adjustment is required in this product ...

Page 67: ...Table 5 9 Table 5 10 Table 5 11 Table 5 12 Table 5 13 Table 5 14 Table 5 15 List of Tables Motor Coil Resistance Sensor Status Error Displays Symptoms and Reference Table OPERATE LED Does Not Light Unit Does Not Initialize Carriage Does Not Move Carriage MovesandCrashes into Frame Lamps Do Not Light Lamps Light before the Error is Displayed Image Unclear Interface Error Parallel Interface Error SC...

Page 68: ... detected the scanner displays an error message using the LEDs Table 5 3 lists the messages that tell you if service is required Table 5 3 Error Displays Error Display Error Cause READY LED ERROR LED ON ON Command error An invalid command has been received An invalid parameter has been received Communication protocols are wrong The interface connection is broken or the OFF Blinks Intefface error c...

Page 69: ... not OPERATE LED does not light 5 5 operate when power is turned on Unit does not begin initialization 5 6 The error messa FATAL ERROR e displayed and the problem is not corrected by switching power off and then on again Carriage does not move 5 7 The carnage moves and crashes into the back or front side frame before the error is displayed 5 s Lamps do not light 5 9 Lamps light before the error is...

Page 70: ...the power on is there The B027 PSB PSE board an output of 5 VDC between pin 7 and No Replace the B027 may be dead pin 5 for CN3 on B027 PSWPSE board PSWPSE board Disconnect CN6 on the B027 MAIN board and use a multimeter to check the coil resistance between pin 2 and pin 4 and pin 1 and Replace the CR pin 3 2 points total on the Yes motor and follow disconnected cable side the steps below to Pin 2...

Page 71: ...ybe dead 7 and power on Does the inverter board in OPERATE LED come on the scanner head Disconnect connector CN2 Scanner head may be dead 8 on the B027 MAIN board Replace the and power on Does the scanner head OPERATE LED come on B027 MAIN board may k g Replace the B027 dead MAIN board Tabie 5 6 Unit Does Not initialize Cause Step Checkpoint Finding Solution B027 MAIN board may h Replace the B027 ...

Page 72: ...between pin 2 and pin 4 and pin 1 and Replace the CR pin 3 2 points total on the N motor If any coil disconnected cable side is shorted follow Pin 2 Pin 4 the steps below to Pin 1 Pin 3 check the driver Are the resistances of the two points above approximately 4 7 ohms If any coil is shorted check The CR motor is defective 3 the CR motor driver circuit using the following procedure 1 Set the multi...

Page 73: ... you replace the inverter Yes Scanner OK board The B027 MAIN board may Replace the B027 be dead MAIN board Table 5 10 Lamps Light before the Error is Displayed Cause Checkpoint Finding Yes Solution Conn tor CN2 on the B027 MAIN board may be disconnected Is connector CN2 on the B027 MAIN board disconnected Connect CN2 on the B027 MAIN board A connector on the CCD board in the scanner head may be di...

Page 74: ...allel interlace cable Does the scanner work after may be bad you replace the interface Yes Scanner OK cable I I I I 1 The B027 MAIN board may 2 be dead Replace the B027 MAIN board Table 5 13 Interface Error SCSI Cause Step The terminator SettingS may be bad The SCSI ID settings may p be bad The SCSI cable may be bad 3 The B027 MAIN board may be dead Checkpoint Finding Solution Check the settings a...

Page 75: ...l including all servicers in the US can ignore this section This table describes various problems likeIy causes checkpoints and solutions The dwckpoint column provides proper waveforms resistance values and other values to be checked to evaluate the operation of any component that might be bad Check these values and take the appropriate action Table 5 14 Repair of the Power Supply Board 5 Rev A c ...

Page 76: ...ive main board It describes various problems likely causes checkpoints and solutions The checkpoint column provides proper waveforms resistance values and other values to checked to evaluate the operation of any component that might be bad Check these values and take the appropriate action Table 5 15 Repair of the Main Control Board Rev A 5 9 ...

Page 77: ...Troubleshooting GT4XNM ES 1 Savlca Mmu Table 5 15 Repair of the Main Controi Board Continued 5 1o Rev A I ...

Page 78: ... 1 MAINTENANCE 6 1 6 2 LUBRICATION 6 1 Figure 6 1 Figure 6 2 Figure 6 3 List of Figures Lubrication Points Lubrication Method 1 Lubrication Method 2 List of Tables Table6 1 Recommended Lubricants Table6 2 Lubrication Points 6 2 6 3 6 3 6 1 6 1 ...

Page 79: ...erly when it is disassembled for component replacement or if mechnical noise exceeds a certain level EPSON recommends only the lubricant listed in table below for this scanner It has been tested extensively and found to comply with the requirements of the scanner mechanism The figure on the next page shows the lubrication points Table 6 1 Recommended Lubricants Type Name Quantity Part No Availabil...

Page 80: ... ...

Page 81: ...GT 9000 ES 1200C Service Manual Maintenance l G 20 1 20mm t ED1 cente I I o I Figure 6 2 Lubrication Method 1 2 G 20 20mm I Figure 6 3 Lubrication Method 2 Rail Rev A w ...

Page 82: ...uti Diagram A n FigureA 6 B027MAlN Board Component Layout A 12 FigureA 7 B027PSB PSE Board Component l ayout A 13 FigureA 8 B0271 F Board Component Layout A 13 Figure A 9 Exploded Diagram 1 A 14 Figure A 10 Exploded Diagram 2 A 15 List of Tables TableA l Board ConnectorSummaw A 2 TableA 2 CNI Pin Assignment A 3 TableA 3 CN2PinAssignment A 3 TableA 4 CN3Pin Assignment A 3 TableA 5 CN4Pin Assignment...

Page 83: ...1 summarizes the description and sizes of the connectors AC IN I CN1 I B027 PSB PSE Board m E FJ L OPERATE Switch Optional l F Scsl CN2 I CN1 B027 l F Board CN1 I I Scsl Bidirectional Parallel i F I I I I CN9 I I CN1O j I CN1l I B027 MAIN Board 4 CN1 I Inverter Board I RGB CCD Lamps Board Scanner Head CR Motor Figure A 1 Cable Connections Rev A A 1 ...

Page 84: ... CN6 Connector for CR motor 4 pin Table A 6 CN7 Connector for RESET button 3 pin Table A 7 CN8 Connector for HP sensor 3 pin Table A 8 CN9 Connector for 6027 i F board 40 pin Table A 9 CNIO Connector for SCSI 50 pin Table 1 6 CN11 Connector for parallel interface 36 pin Table 1 2 9027 PS SE Power Supply Board CN1 Connector for AC power input 2 pin CN2 Connector for 6027 MAIN bod 11 pin CN3 Connect...

Page 85: ... Description Video data bit O Video data bit 1 Video data bit 2 Video data bit 3 Video data bit 4 Video data bit 5 Video data bit 6 Video data bit 7 Video data bit 8 Video data bit 9 A D converter clock GND SH signal for CCD Clock 1 for odd pixel Clock 1 for even pixel Clock 2 for odd pixel Clock 2 for even pixel RS signal for odd pixel RS signal for even pixel Select for odd pixel select for even...

Page 86: ...signments Pin No Signal Name Ilo Deaoription 1 B o Carriage motor phase B 2 o Carriage motor phase 3 o fiw motof phase 4 A o Carriaae motor Dhase A Table A 7 CN7 Pin Assignments Pin No Signal Name Uo Description 1 NC I Reset button on 2 GND GND b 3 NO I Reset button off Table A 8 CN8 Pin Assignments Pin No Signal Name I o Deaoription 1 HP I HP signal 2 GND GND 3 5 5 VDC A4 Rev A ...

Page 87: ...B1 1 0 DB1 signal for SCSI 15 DBO I o DBO signal for SCSI 16 POWER Terminator power 5 VDC 17 ATN I ATN signal for SCSI 18 BSY 1 0 BSY signal for SCSI 19 ACK I ACK signal for SCSI 20 RST I RST signal for SCSI 21 MSG o MSG signal for SCSI 22 SEL 1 0 SEL signal for SCSI 23 CID S D C D signal for SCSI 24 REQ o REQ signal for SCSI 25 1 0 o 1 0 signal for SCSI 26 GND GND 27 Oswl I Option switch 1 28 TXD...

Page 88: ...GT 9000 ES 1200C service Manual Appendix v w t N 2 m M VT UT I I w I t la I I Figure A 3 B027 PSB Board Circuit Diagram Rev A A ...

Page 89: ...a g I 1 1 u In o N 7 g m N x In g Figure A 4 B027 PSE Board Circuit Diagram A 10 Rev A ...

Page 90: ...00C Service Manual Appendix co I I L I Uz pi N C I m Nw nmo N om cwm omm coo omu ITI Wz C Nan U 1 mu l omo mu om mm ome mN omtm m omu tmo amm em I oma ND om NC I Figure A 5 6027 l F Board Circuit Diagram R e v A A n ...

Page 91: ...Appendix GT 90001ES 1200C Service Manual A 3 CIRCUIT BOARD COMPONENT LAYOUT I I L 4 Figure A 6 B027 MAIN Board Component Layout A 12 Rev A ...

Page 92: ...endix 1 II T CAUTION lfATSIM PRESENT 1 RISK W ELECTRIC u T SHOCK TEST BEFC IE TOUCHING 1 1 C 0 s 01 P J5S 11 1 1 CS7 I w oT LI 1 1 C57 I Figure A 7 B027 PSBIPSE Board Component Layout Figure A 8 B027 l F Board Component Layout Rev A A 13 ...

Page 93: ...CR MOTOR UNIT l F COVER PLATE LED CLAMP MOTOR TIMING BELT DRIVE PULLEY TENSION ROLLER SPRING MOTOR FRAME LEVER CR MOTOR C B S SCREW M4 X 6 C P S P S SCREW M3 X 6 C B SCREW M3 X 3 PPL Name HOUSING ASSY UPPER HOUSING SUB ASSY LOWER PLATE BOTTOM COVER ASSY DOCUMENT FRAME FRONT FRAME REAR FLAME SIDE L FLAME SIDE R RAIL MIDDLE COVER DOCUMENT POCKET SHIELD PLATE REAR SHIELD PLATE FRONT PULLEY FLANGE TIM...

Page 94: ...B O SCREW M4 X 8 C B SCREW M3 X 6 B027 VF BOARD C B A LAMITITE M3 X 6 POWER SWITCH KEYTOP RESET SWITCH KEYTOP B027 MAIN BOARD B027 PSB PSE BOARD CABLE CABLE POWER SWITCH RESET SWITCH LED BOARD CABLE PPL Name CARRIAGE ASSY LAMP ASSY BOARD ASSY INVERTOR CABLE CR COVER ASSY CR CLAMP CR HOLDER ROLLER RAIL ROLLER CARRIAGE SHAFT SLIDER RETAINING RING TYPE E 2 3 CARRIAGE ASSY BASE BRUSH CARRIAGE COVER LE...

Page 95: ...0 Cerdanyola del Vanes 20099 Sesto S Giovanni Ml Italy Barcelona Spain Phone 02 262331 Phone 582 15 00 Fax 02 2440750 Fax 582 15 55 EPSON AUSTRALIA PTY LTD EPSON SINGAPORE PTE LTD 1 70 Gibbes Street No 1 Raffles Place 26 00 Chatswood 2067 NSW Australia OUB Centre Singapore 0104 Phone 02 415 9000 Phone 5330477 Fax 02 417 0077 Fax 5338119 EPSON HONG KONG LTD EPSON ELECTRONICS TRADING LTD 201F Harbou...

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