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Epson FX-1050+, Technical Manual

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Epson FX-1050+ Technical Manual Download Page 57

REV.-A

The control circuit consists mainly of the following ICS:

● 

p P D 7 8 1 0 H G  

The 

 10HG CPU executes the program in the 27256 PROM (4A) and controls all of the printer

operations. The CPU begins executing the program from address OOOOH upon receiving the reset

signal. The CPU also reads the DIP switch and jumper settings and detects the states of the analog

circuits.

● 

27256 PROM (4A)

The 27256 PROM includes the control program (firmware) and character generators.

● 

 

 (X 2) (5A/6A)

The 

 

 are external memories for the CPU. They are used as an input data buffer

and line buffer for expanding data and as a working area for the program. (8K x 2 = 16K bytes)

● 

E05A16G gate array (7A)

The 

 16GA gate array controls handshaking for parallel data (including the optional interface),

the control panel, plunger, speed of the carriage motor, and reset signal. The gate array also

generates Italic and Super/subscript characters so that command processing speed is improved

and the load on the firmware is lightened.

● 

E05A15HA gate array (3A)

The E05A15HA gate array has address latch and address decode functions, and controls the

memory. The gate array also controls the carriage and paper feed motors using the 2-channel

automatic phase switching circuit. In addition, the gate array reads the states of the head data

buffer, carriage home position sensor, paper end sensor, and release switch sensor.

Other control circuits are as follows:

● 

Reset circuit

The reset circuit outputs the reset signal. The reset signal is sent to the CPU for the necessary time

either when the printer power is turned on or when the I NIT signal is input from the host computer.

● 

Memory back-up circuit

The memory back-up circuit backs up the panel settings and data for the top-of-form 

 position

stored in the 

 (6A) when the printer power is turned off, so that the values will remain valid

when the printer power is turned on again. The DC voltage supplied to this circuit is monitored,

and power is supplied from the battery for back-up when the main-power voltage level drops.

● 

Plunger drive circuit

The plunger drive circuit drives the plunger using the plunger control signal. The plunger is

controlled by switching the drive voltage on and off.

‘ Paper feed motor drive circuit

The paper feed motor drive circuit drives the paper feed motor using the motor control signals.

The paper feed motor is a 4-phase stepper motor. The rotation of the motor (position and speed)

is controlled by outputting the phase switching signal generated by the 

 15HA gate array and

switching the common voltage (driving or holding).

● 

Carriage motor drive circuit

The carriage motor drive circuit drives the carriage motor using the carriage motor control signals.

The carriage motor is a 4-phase stepper motor. The rotation of the motor (position and speed) is

controlled by outputting the phase switching signal generated by the 

 15HA gate array and

switching the common voltage (driving or holding).

● 

 drive circuit

The 

 drive circuit drives the 

 after expanding the 

 data. Data from the

host computer is processed and expanded so that it is converted to dot data for one vertical row.

Printing is executed by expanding the patterns for vertical rows as the carriage moves.

2-13

Summary of Contents for FX-1050+

Page 1: ...FX 85t3 I05D TECHNICAL MANUAL EPSON ...

Page 2: ...ct to change without notice All efforts have been made to ensure the accuracy of the contents of 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 consequences thereof L Copyright 1988 by SEIKO EPSON CORPORATION Na ga no Japan i ...

Page 3: ...ws Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Provides a general product overview lists specifications and illustrates the main components of the printer Describes the theory of printer operation Discusses the options Includes a step by step guide for product disassembly assembly and adjustment Provides Epson approved techniques for troubleshooting Describes preventive maintenance...

Page 4: ...REV A REVISION TABLE REVISION DATE ISSUED CHANGE DOCUMENT A February 15 1988 1st issue g f v ...

Page 5: ...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 1 REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN 2 MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE LISTED ON THE SERIAL NUMBERIRATING ...

Page 6: ...R 1 GENERAL DESCRIPTION CHAPTER 2 OPERATING PRINCIPLES CHAPTER 3 OPTIONAL EQUIPMENTS Intentionally omitted at this time CHAPTER 4 DISASSEMBLY ASSEMBLY AND ADJUSTMENT CHAPTER 5 TROUBLESHOOTING CHAPTER 6 MAINTENANCE A P P E N D I X vi ...

Page 7: ... 1 21 1 7 2 Software Initialization 1 21 BUZZER OPERATION AND ERROR CONDITIONS 1 22 1 8 1 Buzzer Operation 1 22 1 8 2 Error Conditions 1 22 PAPER HANDLING FUNCTIONS 1 23 1 9 1 Autoloading and Backout Function 1 23 1 9 2 Short Tear Off Function 1 23 1 9 3 Micro Adjustment Top of Form TOF Set Function 1 23 1 10 PAPER END DETECTION 1 24 1 11 MAIN COMPONENTS 1 25 1 11 1 1 11 2 1 11 3 1 11 4 1 11 5 Fig...

Page 8: ... 16 Control Panel 1 29 Figure 1 17 Housing 1 31 Table 1 1 Table 1 2 Table 1 3 Table 1 4 Table 1 5 Table 1 6 Table 1 7 Table 1 8 Table 1 9 Table 1 10 Table 1 11 Table 1 12 Table 1 13 Table 1 14 Table 1 15 Table 1 16 Table 1 17 Table 1 18 LIST FO TABLES Optional Units 1 2 Optional Interface Boards 1 2 Line Feed Speeds 1 4 Cut Sheet Paper Specified Conditions 1 4 Fanfold Paper Specified Conditions 1 ...

Page 9: ... Switch 1 Settings 1 17 Table 1 20 International Character Set 1 18 Table 1 21 DIP Switch 2 Settings 1 18 Table 1 22 J1 Setting 1 18 Table 1 23 Self Test Operation S SS 1 19 Table 1 24 Hexadecimal Dump Operation 1 20 1 iii ...

Page 10: ...PSON ESC P 83 is standard This driver is compatible with the high class models such as FX 800 1000 86e and 286e Double height function Pitch control is possible in the NLQ mode Pica elite proportional modes Since the IBM emulation mode is standard these printers are IBM compatible The IBM characters are also standard 8K byte input data buffer Buffering can be disabled Push tractor unit Printing is...

Page 11: ... 8 Ribbon Pack o 81 XX Optional Interface Board o Table 1 2 Optional Interface Boards No Name I 8 143 New serial interface I 8 1 4 5 IRS 232C c u r r e n t loopinterface type II I 8 148 Intelligent serial interface I 8 149 Intelligent serial interface type II I 8 149M Intelligent serial interface type III I 816 1 IEEE 488 interface I 8 165 Intelligent IEEE 488 interface I 8172 I 32 K byte buffer p...

Page 12: ...onfiguration Feeding Method Friction feed Tractor feed push standard pull optional NOTES 1 When using friction feed Use the paper tension unit Do not use fanfold paper Do not perform reverse feed beyond than 1 6 inches after the paper end has been detected Do not use multi part single sheet forms 2 When using tractor feed Release the friction feed mechanism Multiple copies for printing must be fin...

Page 13: ...r Loading Directions Fanfold paper Inserted from the rear side Cut sheet paper Inserted from the up side Line Spacing 1 6 or programmable min Line Feed Speed See Table 1 3 1 2 16 Table 1 3 Line Feed Speeds Type of Paper Continuous Feed Intermittent Feed Feed Speed Cut Sheet 48 ins line 71 ins line 3 5 see Fanfold 53 ins line 76 ins line 3 1 see Paper Specifications Cut sheet paper Refer to Table 1...

Page 14: ... 4 paper Refer to Table 1 6 Table 1 6 Roll Paper Specifications FX 850 only Width mm I Length mm I Roll diameter not more than 127 mm 5 I Thickness mm I 0 07 0 09 0 0028 0 0035 Weight Kg I 45 5 5 I Quality I Plain paper Copies Not available Envelope Refer to Table 1 7 Table 1 7 Envelope Specifications FX 850 l 050 Size mm 166 X 92 240 X 104 Weight Kg 3 9 78 12 24 lb Quality Plain Bond Air mail Ope...

Page 15: ...m 13 6 203 6mm 354 4 mm 7 or more r 0 33 8 5mm or more 1 1 D T Aec T XYZ r i n t a MOX 14 3 b 364mm I e a r e a 1 A8C 1 XYZ 0 87 22mm or more I NOTES 1 Values in the parentheses apply to the FX 105O 2 Printing is possible for approximately 42 mm after the bottom edge of a page has be n detected Thus the value 13 5 mm lowest print position is given for reference only Paper feed accuracy cannot be a...

Page 16: ...Figure 1 4 Fanfold Paper Printable Area Envelopes Size No 6 166 X 92 mm No 10 240 X 104 mm Quality Bond paper xerographic copier paper airmail paper Thickness 0 1 6 0 52 mm 0 0063 0 01 97 NOTE Differences in thickness within printing area must be less than 0 25 mm 0 0098 Weight 121 241 lb 45 91 g m2 NOTES 1 Envelope printing is only available at normal temperature 2 Keep the longer side of the env...

Page 17: ...Adjustment Lever Position Paper Thickness mm Head adjustment Lever 2nd 0 06 0 1 2 fl ward q 3rd o 13 0 1 7 4th 0 18 5th 0 26 Figure 1 5 Head Adjustment Lever o Positioning NOTES 1 When printing density becomes lighter set the head adjustment lever one position lower 2 When using thicker paper than shown in the above table set the head adjustment lever to the 6th or higher appropriate position by p...

Page 18: ...ge Hz 49 5 60 5 Rating current A 2 1 Insulation resistance M ohm min 10 between AC line and chassis Dielectric strength V AC rms 1250 1250 1 minute between AC line and chassis Environmental Conditions Refer to Table 1 13 Table 1 13 Environmental Conditions Storage Operating Temperature C 3 0 60 5 3 5 Humidity RH 5 8 5 10 80 Resistance to shock G within 1 ms 2 1 Resistance to vibration G 55 Hz max ...

Page 19: ... Proportional NLQ Saris serif 10 12 15 Proportional Draft 10 12 15 Proportional Printing Mode Printing quality Draft NLQ Character pitch 10 12 15 CPI or Proportional Condensed Double width Double height Emphasized Double strike Italic Underlined NOTE A condensed mode for 15 CPI characters is not available Print Speed Refer to Table 1 14 Table 1 14 Print Speed I Type of Letters Print Speed CPS Draf...

Page 20: ...table column is always 137 Previous FX series is 132 Character Size Pitch Refer to Table 1 16 Table 1 16 Character Size and Pitch Type of Letters Width Height Character Pitch mm mm mm Normal 2 1 3 1 2 54 1 O cpi Emphasized 2 1 3 1 2 54 1 O cpi Condensed 1 05 3 1 1 48 17 cpi Elite 1 7 3 1 2 11 12 cpi Condensed elite 0 85 3 1 1 27 20 cpi NOTE Width of Elite character is changed to 1 7 mm from 2 1 mm...

Page 21: ...ronization By STROBE pulse Handshaking By BUSY and ACKNLG either or both Logic Level TTL compatible Data Transmission Timing See Figure 1 6 Connector 57 30360 AMPHENOL or equivalent See Figure 1 7 s J 2 r Lrl ttt NOTE Transmission time rising and falling time of every input signal must be less than 0 2 ps Figure 1 6 Data Transmission Timing of 8 bit Parallel Interface t 1 1 2 ...

Page 22: ...n fn s ...

Page 23: ...he printer cannot receive data The signal becomes HIGH in the follow ing cases 1 During data entry 2 During printing operation 3 In off line status 4 During printer error status 12 PE 30 out A HIGH signal indicates that the printer is out of paper 13 Pulled up to 5V through 3 3 K ohms resistor 14 AUTO FEED XT In With this signal at LOW level the paper is automati cally fed one line after printing ...

Page 24: ... RETURN and is to be connected at signal ground level As to the wiring for the interface be sure to use a twisted pair cable for each signal and never fail to complete connection on the Return side To prevent noise effectively these cables should be shielded an connected to the chassis of the host computer and the printer respectively All interface conditions are based on TTL level Both the rise a...

Page 25: ...data after entry entry L NOTES 1 In the Table 1 18 it is assumed that no ERROR status exists other than that attributable to OFF LINE mode 2 Once the printer is deselected by the DC3 code the printer will not revert the selected state unless the DC 1 code is input again In the deselected state the printer ignores input data until the DC 1 code is received 3 The DC 1 and DC3 codes are enabled only ...

Page 26: ... will be selected as default User defined characters are maintained in printer memory even when the power is turned off so the user defined character set can be easily selected simply by turning off the power setting this switch to ON and then turning the power on again Shape of zero When DIP switch 1 2 is ON prints for clearly distinguishing between Protocol mode a stashed zero 0 when OFF prints ...

Page 27: ...IBM character generator selection Table 1 21 DIP Switch 2 Settings Sw Description ON OFF 2 1 Page length 12 inch 11 inch 2 2 Cut sheet feeder mode On off 2 3 1 inch skip over perforation On off I 2 4 Auto line feed On off 1 1 4 2 Jumper Setting The jumper J 1 is located on the main board and it can fiw SLCT signal to LOW level Table 1 22 J1 Setting I ON Fix to LOW I I OFF Depend on the external si...

Page 28: ...7S9 fN3CDEFGHIJ KLMNOP12RSTUVWXYZ abcdefghijk lmnopqrstuvwxy zC O134S67E19 4r3CDEFGHIJKLKL MNOPQRSTUVWXYZ lA abcdefghijklmnopqr stuvwx Yz i x O134567S9 d CAEICDEFGHIJKLMNOPQRSTUVWXYZ l Tabcdefghijklmnopqrstuvwxy Z ll Draft Mode ol23456789 ABcDEFGHIJKLMNoPQRs TWWXYZ T abcdefgMjkhn omratuvwx X Ol23456789 c ABCDEFGHZJKLMNOPQRBTWWKY Z l abcdefghLlklmomrstuvwxy O123456789 WBCDEl GHIJKLMNOFQRSTUVWKYZ l ...

Page 29: ... 63 65 64 36 20 20 32 36 34 20 43 50 53 20 2S 44 72 61 66 74 20 61 6E 64 20 45 6C 69 74 65 29 OD 0 4 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 3Z Z 30 20 43 50 53 20 28 44 7Z 61 74 20 61 6E 64 20 50 6 63 61 29 OD 06 OD of 20 20 2 2A 20 41 64 76 61 E 63 65 64 o 70 61 70 65 72 20 68 61 6E 64 AC 69 6E 67 20 66 75 6E 63 74 69 6F 6E 7S 3 20 20 41 75 74 6F 20 74 6S...

Page 30: ...panel Sets printer selections to their default values 1 7 2 Software Initialization This type of initialization occurs when the printer receives command ESC via software When the printer is initialized in this way it performs the following actions Clears the print buffer Sets printer selections to their default values NOTE The printer s default values are as follows Page Position Preset paper posi...

Page 31: ...ng Proportional space alternation Beeps once when old proportional space is selected and twice new one is selected 1 8 2 Error Conditions The printer enters an error state and sets the ERROR signal LOW and BUSY signal HIGH to prohibit reception of data when any of the following states occurs The carriage home signal is not detected after the printer mechanism has been initialized carriage error Th...

Page 32: ...ved to the tractor feeder side the paper will be automatically fed to the perforations tear off position when printing is completed no data is being received from the host computer and the print buffer is empty At this time the micro adjustment TOF set function becomes valid so that the tear off position can be adjusted accurately using the LF and FF switches The adjusted tear off position is stor...

Page 33: ...parallel interface signals as shown below and enters the OFF LINE mode BUSY signal HIGH PE signal HIGH ERROR signal LOW After the paper end is detected load a new sheet and press the ON LINE switch so that the printer enters the ON LINE mode Figure 1 10 shows the paper end detection position T Approx 59 9mm I ABC XYZ Printable A r e a Paper End Detection Posltlon ABC XYZ 1 Fig 1 10 Paper End Detec...

Page 34: ...rol panel PEBFIL 11 board filter board and power transformer Housing Figure 1 11 shows the FX 850 l 050 component locations Power Transformer Pape Unit PEBFIL ll Board r T e n s i o n Plunger Printhead FX 850 PEGX Board Paper Feed Motor Carriage Motor FX 1 050 NOTE In FX 850 the paper tension unit and push tractor unit are excluded Figure 1 11 Component Locations 1 25 ...

Page 35: ...ct size and advanced paper handling function These mechanisms are based on printer mechanisms Model 53 10 5360 for the LQ 850 l 050 The optional pull tractor unit or cut sheet feeder can be mounted to the mechanism Since the construction of these printer mechanisms are simplified maintenance is very easy Figure 1 12 Model 3B10 FX 850 Figure 1 13 Model 3B60 FX 105O 1 26 ...

Page 36: ...ircuits for the motors sensors and printhead are also included on this board Other main ICS on the PEGX board are Universal IC Gate STK6722HZ IC2A NJM2355 lCIA Array E05A15HA IC3A E05A16GA IC7A Memory IC EP ROM IC4A S RAM IC5A and 6A Carriage Motor Driver Switching Regulator IC Paper Feed and Carriage and Printhead driver Host computer interface Program ROM 256 K bit Motors controller Buffer and B...

Page 37: ...rcuit is on the main board The PEBFIL 11 board and power transformer remove noise from the AC power supply section and drop the AC input voltage Figure 1 15 shows the PEBFIL 11 board and power transformer 220 240V 120V 120V t 220V 240V Figure 1 15 PEBFIL 11 Board and Power Transformer 1 28 ...

Page 38: ...have various other functions that can be selected from the control panel Figure 1 16 shows the control panel Figure 1 16 Control Panel Switches ON LINE This button controls the printer s on line off line status When the printer is on line ON LINE light is on and the printer can receive and print data from the computer When this lamp is flickering the micro adjustment function can be used FORM FEED...

Page 39: ... SANS SERIF or DRAFT mode The yellow indicator light shows the selected font This button is used to select 10 CPI 12 CPI or PS proportional spacing The yellow indicator light shows the selected pitch This button is used to select or deselect the condensed mode The yellow indicator light is on when the printer is in the condensed mode In this mode all characters are printed at approximately 60 of t...

Page 40: ...components are the paper feed knob paper separator and printer cover The DIP switch position is changed from the rear side of the printer conventional to the right side A removable cover is located on the upper case so that the DIP switches on the optional board can be set without removing the upper case Figure 1 17 shows the upper and lower cases FX 850 FX 1 050 Figure 1 17 Housing 1 31 ...

Page 41: ... 2 Power Supply Circuit 2 15 2 3 2 1 Filter Circuit 2 1 e 2 3 2 2 Transformer 2 16 2 3 2 3 Rectifier and Smoothing Circuit 2 17 2 3 2 4 Chopper Type Switching Regulator Circuit 2 18 2 3 2 5 Pulse Width Modulation PWM Circuit 2 19 2 3 2 6 5V Regulator Circuit 2 21 2 3 2 7 24V Regulator Circuit 2 23 2 3 2 8 12V DC Supply Circuit 2 25 2 3 2 9 Vx Voltage Supply Circuit 2 26 2 3 3 Main IC Function 2 27...

Page 42: ...9 Control Circuit Block Diagram 2 12 Figure 2 10 Memory Mapping 2 14 Figure 2 11 PEBFIL 11 Filter Circuit Board 2 16 Figure 2 12 Transformer Circuit 2 16 Figure 2 13 Rectifier and Smoothing Circuit 2 17 Figure 2 14 Step Down Circuit 2 18 Figure 2 15 Step Down Timings 2 18 Figure 2 16 NJ M2355 Internal Circuit 2 19 Figure 2 17 Output Transistor Drive Waveform 2 20 Figure 2 18 5V Regulator Circuit 2...

Page 43: ...uit Block Diagram 2 53 Figure 2 44 GA E05A15HA Function for Paper Feed Motor 2 54 Figure 2 45 Phase Excitation System 2 54 Figure 2 46 Paper Loading Ejecting Operation 2 57 Figure 2 47 Plunger Mechanism 2 58 Figure 2 48 Plunger Drive Circuit 2 58 Figure 2 49 Relationship Between Transistors and Plunger 2 59 Figure 2 50 Printhead Central Circuit Block Diagram 2 60 Figure 2 51 Print Drive Pulse Widt...

Page 44: ...Table 2 12 Paper Feed Motor Speed 2 55 Table 2 13 Paper Feed Direction and Operation 2 55 Table 2 14 Acceleration Deceleration Mode 2 56 Table 2 15 Relationship Between GA Ports and piungerVoltage 2 59 Q 2 iv ...

Page 45: ... component 2 1 1 Cable Connections The printer components are connected to and controlled by the PEGX board Figure 2 1 shows the interconnection of the components Power Transformer f 120V 220V 1 240V PEGFLU board 120V 220 240V LL AC120V AC220V AC240V I Model 3Bl O 3B60 I PEGX board H o s t c o m p u t e r PGPNL board c Figure 2 1 Cable Connections 2 1 ...

Page 46: ...ormer to the DC regulator 4 Table A 1 7 circuit on the PEGX board CN4 Drives the printhead needles 12 Table A 1 8 CN5 Drives the plunger that opens and shuts the 2 Table A 1 9 PEGX paper bail on the printer mechanism board Transfers the state of the carriage home position CN6 sensor from the printer mechanism to the con 3 Table A 20 trol circuit on the PEGX board Transfers the state of the paper e...

Page 47: ...control circuit on the PEGX board u E05A15HA D E05A15HA CN7 E05A15HA Paper End Sensor Plunger Platen v r I Cantrol Circuit Feed Motor Ribbon Feed I Kl O Carriage Motor Home Position CN6 Printhead Carriage Motor Drive Control Circuit Circuit Figure 2 2 Printer Mechanism Block Diagram The printer mechanism is composed of the following Printhead Carriage Mechanism Home Position Sensor Ribbon Feed Mec...

Page 48: ... the platen Print data expanded on the PEGX board is converted into dot image data for one vertical row and output to the printhead by the printhead drive circuit A character is printed by serially printing the dot patterns for each vertical row in the horizontal direction as the carriage moves Figure 2 3 shows the printhead mechanism Platen Dot Wire Ribbon Mask W re Reaettmg Spring Stopper Paper ...

Page 49: ...ted at any position The carriage motor is controlled by a very simPle oPen lOOp sYstem Figure 2 4 shows the carria9e mechanism Figure 2 4 Carria9e Mechanism 2 2 3 Home Position Sensor The home position sensor detects the home position of the carria9e A home Position seek is performed when the printer is initialized The control circuit stores the home position which is referenced to control the Car...

Page 50: ...bbon feed mechanism The ribbon feed mechanism converts bidirectional horizontal carriage movement into single directional rotational movement so that the ribbon can be taken up during printing Figure 2 5 shows the ribbon feed mechanism ibbon ping Planet Breaking Figure 2 5 Ribbon Feed Mechanism 2 6 ...

Page 51: ...is for friction feed and the other is for tractor feed Rotational movement of the paper feed motor is conveyed to the platen in the case of friction feed and to the push tractor unit the platen also rotates in the case of tractor feed The conveyance mechanisms are switched using the release lever The paper tension unit is mounted at the top of the platen and is rotated by the paper feed motor The ...

Page 52: ... the exit of the case to prevent irregular paper feeding and slackening Paper Release Lever Paper Tension Roller Gear PaperTensionRoller T s T r a n s m i s s i o n G e a r n Platen Gear A Paper Feed Motor Pinion Gear Paper Feed Transmission Gear o Paper i Side View ii Top View a Gear Arrangement Paper Paper Tension Roller Push Tractor Holding Roller Paper Feed Roller Release State b Paper Path Fi...

Page 53: ...nsion unit is used to prevent paper feed problems Paper Release Lever Paper Tension Roller Gear 3 Tractor Transmission Gear Tractor Gear h 1A paDer T ens n o erw i lrAc Rh _fransmisslon Uear g en O m r c ar I Im s l P a p e r Feed otor pinion ear q Friction Tractol Paper Feed Transmission Gear i Side View ii Top View a Gear Arrangement Paper Tension Support Roller Holding Paper J Roller Q o 0 t Pa...

Page 54: ...various circuits that supply DC voltage control all of the printer operations and the control panel and process data from the host computer 2 3 1 1 Power Supply Section Figure 2 8 shows a block diagram of the power supply section WVU 36VDC 1 Filter sten gulator I F I Y 24 egulator ircuit H Half wave rectifier and Smooth in Circuit 2 9Vx Voltage V lta Circuit Figure 2 8 Power Supply Block Diagram 2...

Page 55: ...e regulated 24 VDC and 5 VDC total of 3 supplies are supplied to the control circuit Switching regulator IC NJ M2355 1A controls the chopper type switching regulator circuits for 24 VDC and 5 VDC The 36 VDC and 5 VDC are supplied to the Vx voltage circuit converted to the Vx voltage and supplied to the reset circuit The 12 VAC is converted to unregulated 12 VDC by the positive half wave rectifier ...

Page 56: ...REV A 2 3 1 2 Control Circuit Section Figure 2 9 shows the control circuit block diagram ILEI 1111 1 I I I I I I 0 mz La I II 1 I I 1 Figure 2 9 Control Circuit Block Diagram 2 12 ...

Page 57: ...e necessary time either when the printer power is turned on or when the I NIT signal is input from the host computer Memory back up circuit The memory back up circuit backs up the panel settings and data for the top of form TOF position stored in the SRAM 6A when the printer power is turned off so that the values will remain valid when the printer power is turned on again The DC voltage supplied t...

Page 58: ... which equips pPD7810HG CPU with 64 K bytes of address space Figure 2 10 shows a memory map of this address space FFFF HEX G A E05A15HA FOOO HEX GA E05A16GA EOOO HEX cOOOHEx Aoo ST RAM 5A 8KB 8000 HEX Program and Character Generator 32 KB f 0000 HEX Figure 2 10 Memory Mapping 2 14 ...

Page 59: ...rcuit Section 2 3 2 1 Transformer Section 2 3 2 2 Ractifier and Smoothing Circuit Section 2 3 2 3 Chopper Type Switching Regulator Circuit Section 2 3 2 4 Pulse Width Modulation Circuit Section 2 3 2 5 5V Regulator Circuit Section 2 3 2 6 24V Regulator Circuit Section 2 3 2 7 12VDC Supply Circuit Section 2 3 2 8 Vx Voltage Supply Circuit Section 2 3 2 9 2 15 ...

Page 60: ... ii I 1 22 240V Version Only F 1 2A 125V iOOV Version 2A 125V 120V Version 1 25A 250V 220 240V Version Figure 2 11 PEBFIL 11 Filter Circuit Board 2 3 2 2 Transformer AC Voltages 120 VAC 220 VAC 240 VAC that pass through the filter circuit are divided into 26 VAC and 12 VAC and supplied to the PEGX circuit Figure 2 12 shows a schematic drawing of the power transformer FRlb4ARY IZO vAC ORAY 7F S0 00...

Page 61: ... bridge DB 1 and converted to approximately 36 VDC by smoothing capacitor C 1 The 24 VDC and 5 VDC voltages are converted from this DC voltage which is used as the power supply voltage for the switching regulator IC at the next stage CN AC 1 26 CN 1 0 1 0 00 P VAC Jz 5 0 V lo5t 10 2 c Figure 2 13 Rectifier and Smoothing Circuit 2 17 ...

Page 62: ... C and load current IL flows At this time electromagnetic energy WL is accumulated in choke coil L When the transistor turns off WL is applied to the load via flywheel diode D so that output voltage Vo becomes the average value V Vi X Ton T where T Ton Toff T is constant Therefore Vo can be held constant by controlling Ton Figure 2 15 shows the step down timings Voltage between the collector and t...

Page 63: ...ive terminal of PWM comparator 2 without wired OR Dead time control voltage is also input to additional negative terminals of both PWM comparators 1 and 2 A sawtooth waveform from the oscillator is input to the positive terminals The sawtooth waveform from the oscillator causes the comparators to generate pulses as shown in Figure 2 17 Circuit 1 r 1 i I I I I PWM Comparator 1 I I I I t h t 1 1 2 O...

Page 64: ...controlled by the dead time control voltage When it exceeds the preset value it is controlled c by the error amplifier to keep it lower than the preset value Terminol GTerrnind Oead Time o Control I I I I Voltage vi I I OFF ON OFF ON OFF ON OFF ON o P W M Comparator output Figure 2 17 Output Transistor Drive Waveform 2 20 ...

Page 65: ...circuit This IC has a built in oscillator The oscillation frequency is determined by external components connected to pins 2 and 3 Therefore R22 and C9 cause the circuit to oscillate at about 30 kHz The oscillator waveform is shown in Figure 2 19 C3746 0 1 3 L2 o 012 A1015 I NJM 2355 7A 9 R 13 D3 2 w IW 1 Cll t 1000U 03 10V lo5t R 19 33K VA1 c 12 N I o IM N C7 o 4 Figure 2 18 5V Regulator Circuit ...

Page 66: ...aintaining the voltage at the terminal at 5V Figure 2 21 shows the output from AMP 1 When the voltage at pin 4 becomes higher than that at pin 5 over voltage AMP 1 outputs current modulated by pulse width modulation PWM to reduce the output voltage of the circuit PWM is described below OUTPUT v VREF Pin 4 V o l t a g e r I R20 R 14 3 3K 3 3K Figure 2 20 Constant Voltage Control 5 VDC R 108 and C35...

Page 67: ...ircuit as the 5V VDC regulator circuit Here the error amplifier AMP 2 is used for over current control and AMP 3 for constant voltage control The operation of the error amplifier AMP 3 is as follows 011 C3748 L1 R3 0 NJM2355 7A 11 1 1 Osc n 105C C3 VREF 1 14 15 16 1 IK R17 3 3K 4 R16 1OOK ik 4 b24VDC 6 IK 1 2 4K Is ONo D15 EO GA 30 Poo Figure 2 22 24V Regulator Circuit 2 23 ...

Page 68: ...ol 24 VDC AMP 2 operates as follows for over current control 24 V is applied to the negative terminal and the positive terminal will receive an equal voltage when based on Figure 2 24 a negative current of the following value flows o tpu o tage R9 R3 ms 560 ohms O 22 ohms 5 55 A If the current exceeds this value over current protection is turned on to reduce the output voltage OUTPUT Voltage Figur...

Page 69: ...o 12 VDC As shown by Figure 2 25 the half wave rectified voltages pass through the capacitor smoothing circuit so that the ripple is small and the average DC voltage rises when no load current flows and drops as load current increases v zz D7 3 12V y 1 I t II I C4 CN1 O 1000 R12 25V 3 3K 4 Figure 2 25 12 VDC Circuit 2 25 ...

Page 70: ...24V power supply line drops to 18 6 V or less Q30 and Q23 turn off and the Vx voltage is shut off Reset Circuit Power Supply When the power is switched on or off the circuit is reset so that it will not drive the printer until the power supply becomes stable 24V ZD 10 I RDZOJSB2 R38 6 2K 5V A Q23 A1015 R71 10K I I 5 030 C1815Y R69 3 9K d7 Figure 2 26 Vx Voltage Circuit 2 26 ...

Page 71: ...efer to Section 2 3 1 3 for memory mapping This CPU includes an 8 bit analog to digital converter timer event counter and serial interface These functions can be set in units of bits using the mode register for each port and are used with general 1 0 ports excluding the analog to digital converter Table 2 3 shows the port assignments Refer to the Appendix for details on the CPU Table 2 3 Pin Funct...

Page 72: ...or port 36 AN2 IN Printhead short circuit monitor port 37 AN3 IN DIP switch 2 1 to 2 3 I I 39 AN5 40 AN6 Not used 41 AN7 42 VAref IN Analog reference voltage input 4 7V 43 AVCC Analog port power source 44 RD OUT Read strobe signal output 45 WR OUT Write strobe signal output 46 ALE OUT Address Latch Enable signal output Low address AO A8 47 PFO OUT High address data A8 Al 5 I I 54 PF7 55 PDO IN OUT...

Page 73: ... 4 Pin Function of GA E05A15HA Pin No Signal Name Direction Function 1 BANK O OUT Not used 2 BANK 1 OUT 3 CS4 OUT Chip select signal for the gate array 7A Low active signal 4 CS3 OUT Chip select signal for the ST RAM 6A Low active signal 5 CS2 OUT Chip select signal for the ST RAM 5A Low active signal 6 Cs 1 OUT Chip select signal for the P RAM 4A Low active signal 7 P4 Not used 8 P3 IN Home Posit...

Page 74: ...T 38 HD9 OUT 39 Al 2 IN 40 Al 3 IN 41 Al 4 IN 42 Al 5 IN 43 AO OUT 44 A l OUT 45 A2 OUT 46 CTRG IN 47 I m I IN 48 Vss 49 ALE IN 50 I CTRG I IN Address bit Al 3 for the P ROM 4A Address bit Al 4 for the P ROM 4A Printhead driving signal Head Data 9 Address bit Al 2 Al 5 input Address bit AO A2 output Not used Reset signal input Logic Ground Address Latch Enable Not used 51 A3 OUT I I I 55 A7 OUT Ad...

Page 75: ... Low active signal 7 Vss Logic ground 8 RSTIN2 IN Power on reset signal 9 IN7 IN Parallel data D7 D2 I I 14 IN2 15 STRB IN Strobe signal 17 IN 1 IN Parallel data D1 DO I I 18 INO 19 RSTOUT OUT Reset signal output which the RSTIN1 or RSTIN2 signal is input 20 BUSY OUT BUSY signal 21 ACK OUT Acknowledge signal 22 PE OUT Paper End signal 23 ERR OUT ERROR signal 24 PC3 OUT Carriage motor control signa...

Page 76: ...CA LED ON OFF control signal 44 PB4 OUT 12 CPI ELITE LED ON OFF control signal 45 PB5 OUT PS PROPORTIONAL LED ON OFF control signal 46 PB6 OUT CONDENSED LED ON OFF control signal 47 PB7 Not used 48 Vss Logic ground 49 PA3 IN LINE FEED switch 50 PA4 IN FORM FEED switch 51 PA5 IN LOAD EJECT switch 5 2 PA6 Not used 53 PA7 54 AO IN Address bit AO A2 I I 56 A2 57 Cs IN Chip Select signal input 58 RD IN...

Page 77: ...f the following Reset Circuit Interface Control Circuit Memory Back up Circuit Error Detection 2 3 4 1 Reset Circuit The printer is reset when any of the following occur The printer power is turned on hardware initialization The initialization signal INIT is received from the host computer hardware initialization Control code ESC is received from the host computer software initialization The reset...

Page 78: ...E05A 16GA on the PEGX board Figure 2 28 shows the interface control circuit block diagram Figure 2 29 shows the parallel interface data transmission timing I DATA BUS HOST COMPUTER 1 GA E05A 16 GA 7A IN7 D7 I I INO DO STROBE m BUSY m PE m I AUTO FEED XT 3 CPU 78 10HG 4B PD7 I PDO PA6 PA7 Figure 2 28 Interface Control Circuit Block Diagram i 2 34 ...

Page 79: ... signal However the CPU also outputs a sbftware generated BUSY signal to the host computer via the gate array IC7A so that the BUSY signal to the host computer remains HIGH 3 The CPU stores the data from the gate array IC7A in the input buffer IC5A and informs the gate array of completion of data processing through the data bus The gate array outputs the ACK signal to the host computer to indicate...

Page 80: ...from the host computer is input to terminal IN7 of the gate array via the optional interface 8 143 using a start stop system The serial data is input in order of the start bit data 7 or 8 bits and stop bits While a byte of data is being processed the printer is kept in the BUSY state 2 The data input into the gate array is serially transferred from the RXOUT terminal to the RXD terminal of the pri...

Page 81: ...switch settings are read by the DIP switch circuit whenever the printer power is turned on and whenever the INIT signal is sent to the printer from the host computer Jumpers There are two jumpers on the PEGX board J 1 Determines whether or not the internally fixed printer selection signal SLCTIN is selected by the host computer When jumper J 1 is connected the SLCTIN signal is internally fixed alw...

Page 82: ...264 6A R78 IK MS R77 150 R79 150 77 J CR 17335 Figure 2 32 Memory Back up Circuit When the power is turned on under normal conditions 5V is applied to Vcc of the RAM and the CPU starts reading and writing When the power is turned off and the voltage on the 5V line decreases to about 3 OV transistors Q24 and Q25 are switched off and the voltage from the external lithium battery is applied to the Vc...

Page 83: ... 4 V or more or 19 6 V or less the printer enters an error state Shorted Printhead Drive Transistor The buzzer beeps 10 times with a pause after every beep When the printer power is turned on the drive transistor is checked for shorts during the printer initialization sequence During printing the printhead drive circuit is checked for shorts each time printing of one frame is completed The state o...

Page 84: ...ps No paper was loaded when the printer power was turned on The paper out state was detected during printing paper feeding When the paper out state is detected the printer is set OFF LINE and the following process is performed PE signal goes high PE LED lights Buzzer beeps f 3 2 40 ...

Page 85: ...e controlled by the 4 phase stepper motor drive IC IC2A STK6722HZ This IC IC2A is controlled by a gate array IC3A E05A15HA which is controlled by the CPU The rotational speed of the carriage motor is controlled by another gate array IC3A E05A16GA This gate array IC7A also outputs the power down signal PD 1 that shuts off carriage motor drive voltage Vu when a hardware error is detected Figure 2 33...

Page 86: ...de forward or reverse of the carriage The mode register in the gate array IC3A determines the carriage movement direction and phase switching method and is fed by the CPU The gate array IC3A expands the phase data PDO PD3 from the CPU in the carriage motor phase switching circuit in accordance with the direction and method determined by the mode register and outputs the data to the 4 phase stepper...

Page 87: ...CO and PC3 Figure 2 35 shows the block diagram of the gate array IC7A operation CPU 7810HG 4B PD7 I PDO m G GA E05A 15HA 5V STK6722 3A DB7 I DBO Pco PD 1 7 R97 3 OIK 2A VCC2 Vref PD Figure 2 35 GA E05A16GA Operation Diagram This gate array also performs another function When a hardware error except a paper end is detected in the printer the gate array outputs the power down signal PD 1 to the 4 ph...

Page 88: ... motor under control of the gate arrays IC3A E05A15HA and IC7A E05A16GA Figure 2 36 shows the carriage motor drive circuit block diagram GA E05A15HA STK6722 3A CRA CRB CRC CRD F GA E05A 16GA 7A PD 1 Pco Pc 1 F 2A 1A OA IB Ic OB ID Oc PD OD Vref CCD CAB 1 I t Figure 2 36 Carriage Motor Drive Circuit Block Diagram 2 44 ...

Page 89: ...polar drive two drivers become active in the 2 2 phase excitation system and one and two drivers become active alternately in the 1 2 phase excitation system Figure 2 37 shows the carriage motor drive sequences c ON 1 I i OFF I I 1 I OD N 1 1 I I OFF I 1 I s 1 2 3 415 6 7 8 1 Rotat ion C c w C w Carriage moves left to right I a 2 2 Phase Excitation ICIA 0 I c ON OFF I c ON 1 I I FF I I D N I I I I...

Page 90: ...uence Left to Right I Right to Left Step No Phase A Phase B Phase C Phase D Phase A Phase B Phase C Phase D 1 ON ON ON ON 2 ON ON ON ON 3 ON ON ON ON I I I I I I I I 4 ON ON ON ON Table 2 8 1 2 phase Excitation Drive Sequence Left to Right Right to Left Step No Phase A Phase B Phase C Phase D Phase A Phase B Phase C Phase D 1 ON ON ON ON 2 ON ON 3 ON ON ON ON 4 ON ON 5 ON ON ON ON 6 ON ON 7 ON ON ...

Page 91: ...iver and is absorbed This circuit drives the carriage motor using a constant current chopper type drive system Most of this circuit is included in the 4 phase stepper motor driver IC IC2A STK6722HA Chopper control is performed using a separately excited system oscillation frequency approximately 24 KHz The carriage motor supply voltages VCAB and VCCD are applied intermittently so that the coil cur...

Page 92: ... low TR7 turns off and TR 1 turns off Then ICA starts decreasing When VR13 becomes less than VREF the output of IC2 goes high again The surge voltage also called flyback voltage generated when TR3 is cut off by the zener diode ZD 1 approx 47V between the collector and base of transistor Q5 and is absorbed by transistor Q5 to protect TR3 from being damaged When the carriage motor stops the motor dr...

Page 93: ...PPS pulse per second for the 1 2 phase excitation system are transformed into these for the 2 2 phase excitation system Speed Control Since a stepper motor is used as the carriage motor holding at any position and reversing the printing direction are possible The carriage motor control uses an open loop system and the carriage position is synchronized with the phase switching by the firmware Accel...

Page 94: ...peed mode Refer to Table 2 10 High Speed Skip High speed skip causes the carriage to skip over blank areas at the high speed of 3840 PPS If a blank area continues for nine characters normal characters or more after a print command CR or LF command is received the carriage is controlled to skip the area at the high speed of 3840 PPS As the carriage comes to the end of the blank area the carriage sp...

Page 95: ...he operation flow and Figure 2 42 shows the phase state of home position seek Q A Set 2 2 phase excitation with 2134 PPS of the CR motor I 0 68A Hold the CR motor until 2 0 3 0 m s Move the carriage from right to left 4 steps b I No Decelerate the carriage until it stops Confirm the phase excitation state of the CR motor I Set the phase excitation state to firmware flag I Figure 2 41 Home Position...

Page 96: ...n HP Signal out Phase A 1Phase B CR Motor Phase C I I I I 1 I 1 I I I I I I 1 1 1 I I 2 3 4il Detects HP Signal Figure 2 42 Home 2 I 3 Reads and sets the phase change Point in the CPU Seek Phase States i 2 52 ...

Page 97: ...ve voltage is controlled by PC7 from the CPU and phase switching is performed by the gate array I C3A The paper feed motor rotates in both forward and reverse directions Since the paper feed motor rotates in the reverse direction only for micro adjustment or sheet load eject the paper feed motor cannot be rotated in the reverse direction by any control codes Paper Feed Motor Specifications Type 4 ...

Page 98: ...rcuit G Latch D 1 i Mode Reg Figure 2 44 GA E05A15HA Function for Paper Feed Motor Paper Feed Motor Excitation System The paper feed motor is controlled by the open loop constant voltage drive circuit The phases of the paper feed motor are controlled by PFA PFD of the gate array IC3A E05A15HA 2 2 Phase excitation system is used The paper feed motor has one driving transistor per winding unipolar d...

Page 99: ...of the paper feed motor are controlled by the printer firmware Line spacing is also controlled by the firmware The minimum line spacing value that the user can set is 1 2 16 inch The printer supports the following three speed modes for paper feeding Table 2 12 Paper Feed Motor Speed Speed Mode Feed Speed Excitation System Description 1 660 pps 2 2 Phase Continuous paper feed 2 720 Pp ii 2 2 Phase ...

Page 100: ...imes for constant paper feed motor speed Deceleration control The paper feed motor is decelerated in accordance with the deceleration time table The deceleration time varies depending on the speed mode The number of deceleration steps for each speed mode are the same as the acceleration steps at the corresponding speed mode When the paper feed motor decelerates and stops the drive voltage 36 V is ...

Page 101: ...ion chart of the paper loading ejecting sequence LOAD E CT SW Tractor I e h Y Paper loading operation Cutsheet ejecting operation Y Y LEEc_l N Y N CSF loading operation I Q Cut Sheet Loading operation I Paper Bail close operation I Figure 2 46 Paper Loading Ejecting Operation 2 57 ...

Page 102: ...47 shows the drive mechanism Figure 2 48 shows the shows the plunger drive circuit and Figure 2 49 and Table 2 15 shows the on off timing of the transistors during the plunger drive and paper holding Paper Holdyoller Holding Lever Figure 2 47 Plunger Mechanism vu 5V GA A f 1 5GA D4 Pcl Cys 11 I I n PLVU I I I I I I I I GA I I f16HA PLNGR I I I P5 I Cis I I Plunger Gp Figure 2 48 Plunger Drive Circ...

Page 103: ...istors and Plunger Voltage Table 2 15 Relationship Between GA Ports and Plunger Voltage Supplied Power plunger Q16 Q15 E05A15GA E05A16HA Pcl P5 o OFF OFF HIGH LOW 5 ON OFF HIGH HIGH ON ON LOW HIGH Plunger Specifications Voltage Driving 36 V Holding 5 v No operation O V Coil Resistance 22 Q 5 at 20 C Current Driving 1 6A typical Holding 0 23A typical 2 59 ...

Page 104: ...f the CPU enables the buffer is the gate array and the 9 bits of print data stored in the buffer are output to turn on or off the printhead drive transistors so that the drive voltages are applied to the printhead coils Figure 2 50 shows a block diagram of the printhead control circuit CPU MPD7810HG GA E05A 15HA Y 1 4B 3A Printhead Buffer C3987X9 r 1 P 7 r u r I I PDO v 1 II D II PC6 J I I GP 5 AN...

Page 105: ... it longer or shorter according to changes in the drive voltage so as to keep the drive voltage constant in order to stabilize print quality See Figure 2 50 Figure 2 51 shows the relationship between printhead drive voltage and print drive pulse width 350 Print Drive 340 Pulse Width 330 M s I I I I 1 1 I I I I t 1 I I 1 1 1 I 1 I i I I 1 I I I 1 I I 1 I I i I I 1 L 1 1 1 r 21 6 24 Drive Voltage Fi...

Page 106: ...able drive time to prevent the printhead from being damaged ignores any drive pulses driven for the maximum t I I I I I I I I 1 I I I I From N m v I I I 1 1 I I Buffer I I I J I 1 I I I L r I I 1 I 1 8 I I I I I I Holf dot 9uffer I I Protect Ion To Prlntheod Circuit It Driver I 1 I A I t I 1 1 Dd i I I I I I GA E05A15HA 1 J i Figure 2 52 Halfdot Protection Circuit Block Diagram 2 62 ...

Page 107: ...this signal the CPU stops printing shuts off the 24 V drive voltage and rings the buzzer See Figure 2 50 Bi directional Printing Alignment For bi directional printing printing position alignment is performed The print timing pulse is delayed when the printhead moves from right to left to align the vertical printing positions printed when the printhead moves from left tot right with those printed r...

Page 108: ......

Page 109: ...REV A CHAPTER 3 OPTIONAL EQUIPMENTS Intentionally omitted at this time 3 i ...

Page 110: ...Mechanism Removal 4 13 Printhead Removal 4 14 FPC Flexible Printed Cable Removal 4 15 Carriage Motor Removal 4 16 Timing Belt Belt Driven Pulley Removal 4 18 Home Position Sensor Removal 4 19 Paper Feed Motor Transmssion Gears Removal 4 20 Friction Tractor Sensor Removal 4 21 Plunger Removal 4 22 Platen Unit Removal Paper Release Lever Removal Main and Base Frame Removal Ribbon Driver Unit Removal...

Page 111: ...4 13 PEBFIL 11 Board Removal 4 11 Figure 4 14 Printer Mechanism s Component Relationship 4 12 Figure 4 15 Printer Mechanism Removal 4 13 Figure 4 16 Ground Plates Removal 4 14 Figure 4 17 Printhead Removal 4 14 Figure 4 18 Disconnecting FPC 4 15 Figure 4 19 FPC Removal 4 15 Figure 4 20 Carriage Motor Removal 1 4 16 Figure 4 21 Carriage Motor Removal 2 4 16 Figure 4 22 Timing Belt Removal 4 18 Figu...

Page 112: ...oller Unit Relationship 4 31 Figure 4 45 Paper Feed Roller Unit Removal 4 32 Figure 4 46 Paper End Sensor Removal 4 32 Figure 4 47 Paper Holding Roller Shaft Removal 4 33 Figure 4 48 Paper Holding Roller Lever R Removal 4 33 Figure 4 49 Paper Holding Roller Lever L Removal 4 34 Figure 4 50 Tractor Assembly Left Removal 4 35 Figure 4 51 Tractor Assembly Phases 4 35 Figure 4 52 Paper Tension Roller ...

Page 113: ...BLES Table 4 1 Maintenance Tools 4 1 Table 4 2 Measuring Instruments 4 1 Table 4 3 Lubricants and Adhesive 4 1 Table 4 4 Abbreviations List of Small Parts 4 6 Table 4 5 Form and Abbreviated Part Name of Screws 4 6 4 iv ...

Page 114: ...0 Tweezers o B64 1000100 E ring holder 2 5 o B740900400 E ring holder 3 o B740800500 E ring holder 4 o B740800600 E ring holder 5 o B740800700 Alcohol o Electric soldering iron o B740200 100 Brush No 1 0 B74 1400200 Brush No 2 0 B74 1400100 Cleaning brush o B74 1600100 o E Commercially available product EPSON exclusive tool Table 4 2 Measuring Instruments Description Specification Necessary Conven...

Page 115: ... shows some of the parts found on the FX 850 1050 Paper Guide itches Paper Release Lever Control Panel Paper Tension Unit Push Tractor Print Head Parallel Interface Power Switch Figure 4 1 Parts of the FX 850 1050 4 2 ...

Page 116: ... the printer for transport 1 2 Remove the ribbon cartridge and platen knob Figure 4 2 Ribbon Cartridge and Platen Knob Removal Slide the printhead to the middle of the printer Then using a cross head screwdriver reattach the two transport locking brackets Figure 4 3 Transport Locking Brackets Installation 4 3 ...

Page 117: ... the left and right locking tabs Slide the print head all the Figure 4 4 Locking Tabs Installation way to the left and insert the print head protector as shown below Figure 4 5 Printhead Protector Installation 4 4 ...

Page 118: ...ection is grouped into three parts 1 removal of the upper case 2 removal of the circuit boards and 3 disassembly of the printer mechanism This sequence is shown in Figure 4 6 IRemove power cord Interface cable and paper I Remove paper tension unit Remove paper guide paper rest and printer cover I Remove ribbon cartridge I 1 SectIon 4 2 1 Sect Ion 4 2 5 2 Upper Case Removai Printhead Removai I Figu...

Page 119: ... P Cross Pan head S tight with Plain washer CTB 0 Cross Truss head B tight with Outside toothed washer HNO Hexagon Nut with Outside toothed lock washer RE Retaining E ring Pw Plain Washer LS Leaf Spring Table 4 5 illustrates the relationship between a screw s physical characteristics and its abbreviated part name Table 4 5 Form and Abbreviated Part Name of Screws Hemi Body washer bled CJross reces...

Page 120: ... in the printer Step 1 Remove the platen knob Step 2 Remove CBB 4 X 12 screw securing the upper and lower cases Figure 4 7 Upper Case Removal Step 3 Detach the upper case by pressing in on the two retaining clips These clips are located on both side of the printer case Step 4 Disconnect connector CN 11 which connects the PEGX board Step 5 Remove the upper case ASSEMBLY POINT Before setting the upp...

Page 121: ...4 2 3 Push Tractor Unit Removal Remove the push tractor unit before removing the circuit boards and the printer mechanism from the lower case Step 1 Remove the upper case Refer to Section 4 2 1 Step 2 Remove the two CPS 0 3X 6 screws securing the push tractor to the printer mechanism Step 3 Remove the push tractor unit by pushing it to the back CPS 0 3x 6 Push Tractor Unit Figure 4 9 Push Tractor ...

Page 122: ...y on the PEGX board always supply DC voltage to the static RAM 4 2 4 1 Step 1 Step 2 Step 3 Step 4 PEGX Board Removal Remove the upper case Refer to Section 4 2 1 Remove the push tractor unit Refer to Section 4 2 3 Disconnect connector CN3 which connects the power transformer Disconnect connectors CN4 CN5 CN6 CN7 CN8 CN9 and CN 10 which connect the printer mechanism CN3 CN6 CN7 Lithium Battery CN5...

Page 123: ... Shield Plate Figure 4 11 Shield Plate Removal Step 6 Remove the two CBS 3 X 10 and CBB 3 X 12 screws securing the PEGX board Step 7 Release four tabs securing the PEGX board Step 8 Remove the PEGX board CBS CBB PEGX Board Tab Tab Figure 4 12 PEGX Board Removal 4 10 f ...

Page 124: ... Disconnect connector CN 1 which connects the PEBFIL 11 board Step 3 Remove grounding screw CPS 0 3 X 6 which secures the PEBFIL 11 board Step 4 Remove grounding screw CB 0 4 X 8 which secures the A C ground wire CN 1 PEBFIL 11 Board CB 0 4X 8 w CPS 0 3x 6 Figure 4 13 PEBFIL 11 Board Removal 4 11 ...

Page 125: ... 5 1 Printer mechonism Removal I I I I b Section 4 2 5 9 Section 4 2 5 6 Section 4 205 3 section 402 5 8 Plunger Removal Home Position Sensor Printheod FPC Friction Troctor Removal Removal Sensor Removal A 1 Section 4 2 5 7 I Section 4 2 5 11 1 Pqwr Releose Lever Removal I I section 4 2 5 15 I 1 Section n Section 4 2 5 4 I J Removal I t Section 4 2 5 5 1 I I Section 4 2 5 16 1 I Paper Feed Roller ...

Page 126: ...N7 CN8 CN9 and CN 10 from the pEG board Refer to Figure 4 1 O For the FX 850 remove the three screws or for the FX 1 050 remove the four screws CPS 0 3 X 6 which attach the ground plates to base frame For the FX 850 remove the four screws or for the FX 105O remove the five screws CBB 0 4 X 25 securing the printer mechanism to the lower case CPS 0 3X 6 CBB P 4X 25 Figure 4 15 Printer Mechanism Remo...

Page 127: ...ure Printhead Removal Remove the printer cover Remove the ribbon cartridge Ground Plate 4 16 Ground Plates Removal Move the head lock levers to the outside Shift the printhead slightly toward the platen side 1 pull it upward 2 slide it to the right and 3 remove from the carriage Figure 4 17 Printhead Removal 4 14 ...

Page 128: ...e printhead Refer to Section 4 2 5 2 Remove the FPC at the bottom of the base frame Press the two tabs for the head cable guide at the bottom of the base frame and remove head cable holder Remove FPC Base frame Ta Head C ble Holder Figure 4 19 FPC Removal the ASSEMBLY POINT The FPCS are taped to the base frame with a double sided adhesive tape Before retaping the FPC to the base frame use alcohol ...

Page 129: ...unting plate to base frame via carriage motor mounting bush Step 5 Remove the carriage motor mounting plate together with the carriage motor Timing Belt Tension SpI Carriage Mot Mounting Pla Base ing or lte Fra Figure 4 20 Carriage Motor Removal 1 Step 6 Remove the four CPS 0 3 X 6 screws on the rear side of the carriage motor mounting plate which secure the carriage motor Carriage Motor Carriage ...

Page 130: ...rriage motor with carriage motor mounting plate and carriage motor mounting bushes on base frame by lightly tightening two CPS 0 3 X 10 screws 3 Attach the timing belt tension spring to hooks on both the base frame and carriage motor mounting plate 4 Tighten the screws on the carriage motor mounting plate 4 17 ...

Page 131: ...elt Printhead Position Timing Belt Tension Spring Figure 4 22 Timing Belt Removal Engaged Part Carriage Bottom View Timing Belt Figure 4 23 Timing Belt Insertion ASSEMBLY POINTS Verify that the timing belt runs around the belt driven pulley and the belt driving pulley of the carriage motor shaft Insert the timing belt firmly into the carriage utilizing the notch in the base frame in the same way a...

Page 132: ...m Refer to Section 4 2 5 1 Press the two tabs of the home position sensor on the bottom of the base frame Remove the home position sensor Disconnect the connector from the home position sensor Tab Home Position Sensor v Connector a Bottom View b Top View Figure 4 24 Home Position Sensor Removal 4 19 ...

Page 133: ...oval Step 4 Remove the tractor transmission gear spring Step 5 Remove the paper feed transmission gear Step 6 Remove the PW 5 2 X 0 3 X 10 and tractor transmission gear Tractor Transmission Gear 0 i Pw 5 2 x 0 3 x 1 0 L m y 1 ti z Figure 4 26 Transmission Gears Removal ADJUSTMENT REQUIRED When the paper feed motor is replaced or the fixing screws are loosened perform the following adjustment 4 3 2...

Page 134: ... the paper feed motor Refer to Section 4 2 5 7 Remove the CPS P 3 X 10 screw securing the friction tractor sensor to the side frame R then remove the sensor P 3 x 10 I I a I Side Frame R Frictionfiractor Sensor Figure 4 27 Friction Tractor Sensor Removal ASSEMBLY POINT Make sure of the sensor direction and set in place before mounting the friction tractor sensor on the side frame R 4 21 ...

Page 135: ...unger to the side frame L then remove the plunger i Plu ger Loading Lever Figure 4 28 Plunger Removal ASSEMBLY POINTS 1 Mount plunger on side frame L by tightening the two CPS 0 3 X 6 screws lightly 2 Set loading lever onto paper holding lever L and put on RE 3 3 Hold the pulnger and cylinder as shown in Figure 4 29 and position it where move smoothly the cylinder and tight screws Figure 4 29 Plun...

Page 136: ...cover to side frames L and R then remove the platen cover aft Plate Cover Platen Figure 4 30 Platen Cover Removal Step 3 Push on the right shaft holder clip and rotate it forward Step 4 Remove the platen unit by moving it to the right side while pulling paper holding roller shaft forward Right Shaft Holder x Platen Figure 4 31 Platen Removal 4 23 ...

Page 137: ...Step 2 Remove the paper feed motor and transmission gears Refer to Section 4 2 5 7 Step 3 Remove the platen unit Refer to Section 4 2 5 10 Step 4 Press the paper release lever tab at the inside of the side frame R then remove the lever Tab Paper Release Lever Figure 4 32 Paper Release Lever Removal 7 4 24 ...

Page 138: ...o Section 4 2 5 4 Step 4 Remove the belt driven pulley Refer to Section 4 2 5 5 Step5 Remove the paper feed motor Refer to Section 4 3 5 7 Step 6 Cut wire clamps fix cables to the base frame Wire Clamp Wire Clamp hr dab w FX 850 FX 105O Figure 4 33 Wire Clamp Positions Step 7 Remove the home position sensor and plunger cables from the base frame Figure 4 34 Cable Positions on the Base Frame 4 25 ...

Page 139: ...o Su Paper Release Lever Step 9 Step 10 40 CPS 0 3x 1 o Side Frame L Figure 4 35 Side Frame Screws Removal Remove the sub paper release lever from the side frame R See Figure 4 35 Detach the hooks on the main unit from the base frame and pull the main unit up Hooks f Base Frame Figure 4 36 Printer Mechanism Separation 4 26 ...

Page 140: ...ion Senser FPC Figure 4 38 Base Frame Unit ASSEMBLY POINT When fitting the main frame to the base frame hook the eight tabs into the holes in the base frame and pull it forward TADJUSTMENTSREQU RED The following adjustment is required to reassemble the printer mechanism 4 3 2 Paper Feed Motor Backlash Adjustment 4 27 ...

Page 141: ...inter mechanism Refer to Section 4 2 5 1 Step 2 Separate the main and base frame units Refer to Section 4 2 5 1 2 Step 3 Press the six tabs for the ribbon driver unit at the bottom of the base frame and remove it Tab Figure 4 39 Ribbon Driver Unit Removal Tab c 4 28 ...

Page 142: ...5 1 1 Step 3 Remove the RE 3 securing the loading lever of the plunger to paper holding lever L Step 4 Remove the two HNO 4 nuts from the side frame L Step 5 Remove the HNO 4 nut from the side frame R a Left Side View HNO 4 b Right Side View Figure 4 40 Carriage Removal Step 6 Spread both frames L and R apart and remove the carriage guide shafts A and B 4 29 ...

Page 143: ...arallel adjustment bush to the right side of the carriage guide shaft B NOTE LS and parallel adjustment bush has direction set as shown in Figure 4 42 Side Frame R LS Carriage Guide Shaft B r 7 Parallel Adjustment Bush II Pa allel AdjustmentBush Figure 4 42 LS and Parallel Adjustment Bush Removal 3 Adjust the parallel adjustment bush where the printhead moves along the platen in parallel I ADJUSTM...

Page 144: ...1 050 remove three paper guide plate springs with the mechanism status Paper Guide Plate w a Paper Guide Plate Spring Figure 4 43 Positional Relationship Between Paper Guide Plate and Paper Guide Plate Springs Step 4 Remove the paper guide plate ASSEMBLY POINT When setting the paper guide plate verify that its direction is correct Paper Feed Roller Unit Paper Guide Plate Figure 4 44 Paper Guide Pl...

Page 145: ...om the hook on the base frame Base Frame Paper Feed Roller Unit Paper Feed Spring Figure 4 45 Paper Feed Roller Unit Removal 4 2 5 17 Paper End Sensor Removal Step 1 Step 2 Step 3 Step 4 Remove the printer mechanism refer to Section 4 2 5 1 Separate the main and base units Refer to Section 4 2 5 11 Loosen the two bends securing the paper end sensor to the back of the paper guide Remove the paper e...

Page 146: ...ers Step 3 Remove the carriage motor Refer to Section 4 2 5 4 Paper Holding Lever L Step 4 Step 5 Step 6 Paper Holdi g Roller Shaft Carriage Motor Figure 4 47 Paper Holding Roller Shaft Removal Remove RE 3 at the side frame R See Figure 4 48 Detach the paper holding lever R spring from the paper holding lever R Remove the paper holding lever R Paper Holding lever R Spring Paper Holding Lever R ler...

Page 147: ...t the paper holding lever L Remove the HNO 4 nut securing the head adjustment lever to carriage guide shaft B then remove head adjustment lever Detach the paper holding lever L spring from the paper holding lever L Remove the paper holding lever L Figure 4 49 Paper Holding Roller Lever L Removal 4 34 ...

Page 148: ... to the tractor base frame Remove the HNO 4 nut securing the tractor guide shaft Remove the tractor side frame L Push the tractor lock lever upward and remove the left sprocket assembly from the shafts Tractor Lock Lever Tractor Assembly left Tra tor A 6 7 Shaft Holder Figure 4 50 Tractor Assembly left Removal ASSEMBLY POINT When mounting the tractor assemblies to the shafts set them so that the m...

Page 149: ...n roller shaft at the inside of the paper tension frame R Remove the RE 4 on the paper tension roller shaft at the outside of the paper tension frame L Remove the CPS 0 3 X 10 screw securing paper tension frame Lto paper tension base frame Remove the HNO 4 nut Disconnect the paper tension shaft holder from the paper tension frame R by sliding it toward the outside then remove it RE 4 RE 4 HNO 4 CP...

Page 150: ...fer to Section 4 2 5 l Step 2 Remove the printhead Refer to Section 4 2 5 2 Step 3 Remove the ribbon mask Figure 4 53 Ribbon Mask Holder and Ribbon Mask Configuration Step 4 Reinstall the printhead on the carriage NOTE When reinstalling the printhead lock the head lock levers while pushing the printhead Step 5 Step 6 Step 7 Step 8 forward and downwoard Move the carriage to center Lighty loosen the...

Page 151: ...0 51 f 0 05 mm Adjust the platen gap using a thickness gauge while rotating carriage guide shaft B in the direction of the arrow in Figure 4 55 WARNING At this time the paper release lever must be in the friction feed position Do not turn it forward carriage I l I 1 I I 1 1 I I I Screwdriver Guide Shaft B screw up a b Figure 4 55 Eccentric of Carriage Guide Shaft B 4 38 c S 0 51 0 05 mm Platen Pri...

Page 152: ...e gap value again to confirm that it is correct Step 14 Move the carriage to the right end and measure the gap value again to confirm that it is correct Step 15 Remove the printhead Step 16 Reinsert the ribbon mask into the ribbon mask holder Step 17 Connect the FPC to the printhead and reinstall the printhead onto the carriage 4 39 ...

Page 153: ...Loosen the two CPS 0 3 X 6 screws on the paper feed motor Manuallv rotate the DaDer feed motor and adiust the gear backlash between the pinion and the paper feed transmission gear Allowable backlash 0 10 0 05 mm Step 4 Tighten the screws on the paper feed motor Paper Feed Transmission Gear K s i eed Motor CPS 0 3 X 6 Paper Faed Transmission Gear 7 4 0 L Pinion 0 0 10 0 05 m m Figure 4 57 Paper Fee...

Page 154: ...ressing the CONDENSED switch a Retry IThe printer enters the Bi D adjustment mode Press the control panel switch as following sequence D Q Q See Figure A The pre sing operation is required quickly It must be done within 4 seconds No if pressing operation is slow the printer becomes on line state b during operation and disable the Bi D I adjustment Execute the Speed Model print operation See Figure...

Page 155: ...se Press FORM FEED switch 4 I Press LINE FEED switch I I 1 I Execute the Speed Mode 3 print operation I Print Alignment Yes No IAdjust the bi direction print alignment by the following I control panel operation Pressed 9witchl Even Line AdJust Valw cOrOEr ED Irlght shifi decrease LOAD EJECl left shift increase Press FORM FEED switch Figure 4 58 Bi Directional Print Alignment Adjustment Sequence ce...

Page 156: ...1111 odd W 1 line Even win litm Odd Print 1 Spemd 3 djust IDH Even Print line S d llllllilllllll llllllllllllllllll fidjust 27H 11111111111111111111111111111111111 Figure B Bi Directional Printing Sample Yes No I Press LINE FEED switch Press FORM FEED switch I Figure 4 58 Bi Directional Print Alignment Adjustment Sequence cent d 4 43 ...

Page 157: ...tion 5 4 PDOS for RAM and CPU Check 5 7 Programmer Tips 5 8 REPLACEMENT 5 9 REPAIR 5 17 Power Supply Circuit 5 17 Control Circuit 5 20 Model 3Bl O 3B60 Printer Mechanism 5 20 LIST OF FIGURES Troubleshooting Procedure 5 1 System Overview 5 2 Initial Screen 5 3 Menu Screen Mode Screen 5 4 Manual Mode Menu Screen 5 4 Question Screen Example 5 5 RAM and CPU Check 5 7 LIST FO TABLES Troubleshooting Too...

Page 158: ...ult check using the diagnostic tool 1 I PEGX board component repair Printer Mechonism ports repair I 3 Refer to section 5 3 Unit Replacement Refer to section 5 3 1 I Figure 5 1 Troubleshooting Procedure Table 5 1 lists the troubleshooting tools contained in the printer Table 5 1 Troubleshooting Tools Tool No Item Description Part No Diagnostic 6 4 8 Tool Use together with EPSON PC EQUITY QX 16 B76...

Page 159: ...other computer the appropriate MS DOS system and GWBASIC EXE will be required The EPSON printer diagnostic tool PDOS has the following features Easy parts level repair A simple structure using a host computer with MS DOS one flexible and a diagnostics ROM EPSON supplies only the diagnostics ROM and the flexible disk B765 109701 PDOS For FX 850 1050 with IBM PC QX l 6 i disk containing the programs...

Page 160: ...e disk can be used on EPSON PC EQUITY or the QX 16 to select the computer 1 Active the MS DOS system for your host computer 2 Remove the MS DOS system disk 3 Place the PDOS system disk in drive A 4 To use PDOS on EPSON QX 16 type A CC QX To use PDOS on EPSON PC EQUITY type A CC IBM 5 The host computer is now selected NOTE Default setting is the EPSON PC EQUITY 5 2 4 System Activation After the sys...

Page 161: ... the trouble was determined using an oscilloscope or other test equipment Figure 5 5 shows the menu screen for the Manual Mode 01 POWER HEX 02 TEMP HEX 03 COLUMN HEX 04 CG HEX 05 SW HEX 06 SWLED HEX 07 HOME HEX 08 PE HEX PLEASE SELECT TEST FILE NUMBER Figure 5 5 Manual Mode Menu Screen As shown in Figure 5 5 the menu mode displays all test file names in the system from which a user can select the ...

Page 162: ...aken by a user who is familiar operation or when checking specific parts needing repair The user observes waveforms and voltages on the oscilloscope by following the on the CRT screen and inputs the results in YES NO format After the checks are finished the suspected part is displayed on the screen This mode determines the malfunctioning part at its conclusion with oscilloscope instructions given ...

Page 163: ...or paper feeding Down loads special character to check dot alignment Checks the height lag during double height printing After repairing the printer this mode should be used to test the unit You can select the printer types interface types and mode of test print Function Check Final Check This mode is used to check ail of the printer function Bi Directional printing alignment check Bit Image Mode ...

Page 164: ...n or off 3 Check to see if any LEDs are blinking POWER ON J NO POWER READY PO ONLINE LEDs ON I YES J NO ALL LEDS TURNS OFF I YES NO ONLINE LED ON I YES FINISH IC7C INITIALIZE NO PAPER OUT LED ON 1 YES FINISH IC3A INITIALIZE NO READY LED ON I YES FINISH IC4B INITIALIZE J YES ONLINE LED BLINKS 1 NO YES PAPER OUT LED BLINKS I NO YES READY LED BRINKS I NO NO BUZZER BEEPS I YES READ DIP SWITCHES CHECK ...

Page 165: ... check 09H Paper feed motor phases output OAH Carriage motor phases output OBH Plunger solenoid On Off OCH Plunger drive voltage change drive hold ODH Paper feed motor drive voltage change drive hold OEH Plunger enable line change disable enable OFH Interface control line Hi Lo 10H Carriage motor current change line Hi Lo 1 IH All selecType LED On OFF i 5 2 7 Programmer Tips 1 If you are lost in t...

Page 166: ...25A X502063040 PEGX Boards Main Circuit Board Y46 1201000 PEBFIL 11 Board 120V Filter Board Y566204200 220 240V Filter Board Y566204000 Power Transformer 10OV FX 850 Y566503000 120V FX 850 Y566504000 220V FX 850 Y566505000 240V FX 850 Y566506000 100V FX 1 050 Y46 1502000 120V FX 1 050 Y46 1503000 220V FX 1 050 Y46 1504000 240V FX 105O Y46 1505000 Model 3B 10 Printer Mechanism FX 850 Y46 1590100 Mo...

Page 167: ...ting in self No printing is executed test with Normal Car Printhead dot missing 5 13 riage Operation Abnormal Paper Feed No paper is fed Separation between lines varies with irregular paper 5 14 feed Abnormal Operation of No paper is fed by operation of the LF or FF switch Control Panel in OFF LINE mode 5 15 No operation mode is set from the control panel ON LINE or OFF LINE mode is not obtained I...

Page 168: ... not operate with power switch ON POWER LED does not light Use correct AC input voltoge disconnect I RODIOCO the fuse I i o A Yes I Reploce the PEBFIL I boord ond power transformer I No Yes e I Reploce the PEGX boord 5 11 ...

Page 169: ...re connectors CN4 CN5 CN6 CN7 CN6 CN9 ond CN1 O connecting the PEGX boord and the printer I mechonlsm lnserte Secure connectors 4 I No T Yes E W I Reploce the printer mochordsm I L 1 No the foult corrected Yes I Reploce the PEGX boord I I v EN E 5 12 ...

Page 170: ...t the self test printing is incorrect 1 Set the head odJustrnent lever d me i nd Osltlon md orm eel test I I Replao the prlnthead I Yes I Relneert thorn correctly I No m I Replae the p lntheod 1 I I I I Yes T Replace the PEQX bored 5 13 ...

Page 171: ...elf test printing is normal but the paper is not fed properly START I 1 Set the paper correctly I ptoten knob rotote I Replace the PEGX board I I Replae the printer mechmlem Y7 17 1 I Reploce the PEGX board I z 5 14 ...

Page 172: ...el does not operate correctly No between the control pate I Reinsert cOnnector CNl 1 correctly I n I I I v I I Reploce the control ponel I I I Reploce the PEG boord I I Reploce the PEGX board I I I Reploce the PEGX boord 5 15 ...

Page 173: ...the ON LINE mode NOTE It is assumed that the host computer operates normally I Perform ss printhg I f to other troubleshooting Confirm the tronsmlsslon conditions of the printer ond the host computer Yes Replace the PEGX board I v EN 5 16 ...

Page 174: ...mal operation By referring to the checkpoints determine the detective component and perform the proper repair Table 5 6 has the following four columns Symptom Check symptoms against those given in this column Cause Check problems against the causes listed in this column Check Point Use the instructions given in this column for troubleshooting Solution Make repairs according to the instructions giv...

Page 175: ...on waveform and the switching Replace IC 1A defective waveform oklllzk IV DIV 20 DlV Oscillation Waveform pin 2 of IC 1A obllu 10V DIV 20ps DIV Switching Waveform Pin 9 of IC 1A Transistors Q 12 Observe the chopping waveform Replace Q12 or and Q 13 are Q13 defective oU_u IOV DIV 20 Ls DlV Chopping Waveform Emitter of Q13 5 18 ...

Page 176: ...veform and the switching uvaveform T ok k lzk IV DIV 20 Ls DlV Oscillation Waveform Pin 2 of IC 1A IOV DIV 20 DlV Switching Waveform Pin 1 1 of IC 1A Observe the chopping wave form o Lnn_ll IOV DIV 20 Ls DlV Chopping Waveform Emitter of Q1 O Observe the Vx voltage when printer power is turned on If Emitter v h Collector t 1 2V DIV 5 DlV Vx Voltage Waveform Q23 Solution Replace IC 1A Replace Q1O or...

Page 177: ... 60V 150mA 400mW Q23 Q24 2SA1015 50V 150mA 400mW 5 4 3 Model 3 B10 3B60 Printer Mechanism Use the diagnostic tooI to detect malfunctions among the carriage motor paper feed motor and sensor Table 5 8 lists the specifications for these components use the printing test and also inspect visually Table 5 8 Electric Device List Name Description Carriage Motor Type 4 phase 200 pole stepper motor Voltage...

Page 178: ...on Point Diagram 1 6 2 Figure 6 2 FX 850 Lubrication Point Diagram 2 6 3 Figure 6 3 FX 1 050 Lubrication Point Diagram 1 6 4 Figure 6 4 FX 105O Lubrication Point Diagram 2 6 5 Figure 6 5 Adhesive Application LIST OF Point 6 6 TABLES Table 6 1 Lubricants and Adhesive 6 1 Table 6 2 Lubrication Points 6 1 Table 5 3 Adhesive Application Point 6 6 6 i ...

Page 179: ...rts to be lubricated are clean before applying lubricant and avoid excessive application which may damage related parts Adhesive application is necessary at the point indicated in Table 6 3 when the part is disassembled or replaced EPSON recommends Neji lock 2 G adhesive be applied to the point diagrammed in Figure 6 5 Avoid overview of excess to related parts Table 6 1 Lubricants and Adhesive Cla...

Page 180: ...REV A 582 583 520 544 g Fogire 6 1 FX 850 Lubrication Points Diagram 1 6 2 ...

Page 181: ...REV A T 2 i 8 9 532 Fogire 6 2 FX 850 Lubrication Points Diagram 2 6 3 ...

Page 182: ...REV A I I al I a61 A l i 6 G27 502 5 G27 582 a 583 520 5 8 2 585 f Figure 6 3 FX 105O Lubrication Points Diagram 1 6 4 ...

Page 183: ...REV A 5 8 65 3 7 580 536 f d q f 583 g 5 3 5 3 587 531 5 0 8 Figure 6 4 FX 105O Lubrication Points Diagram 2 6 5 ...

Page 184: ...ation Point Refer to Figure 6 5 Ref No Adhesive Application Point I I 11 Engaging parts between timing belt and carriage f Carriage Position a Carriage Position 1 1 Neji Lock 2 b Bottom View Figure 6 5 Adhesive Application Point 6 6 ...

Page 185: ...gure A 21 Figure A 22 Figure A 23 wPD781 0 781 1 Pin Diagram A 2 wPD781 0 781 1 Block Diagram A 3 OP Code Fetch Timing A 6 Memory Read Timing A 6 Memory Write Timing A 6 GA E05A15HA Pin Diagram A 7 GA E05A15HA Internal Block Diagram A 8 GA E05A16GA Pin Diagram A 1 3 GA E05A16GA Internal Block Diagram A 14 HM27256G 25 Pin Diagram A 1 9 HM27256G 25 EP ROM Block Diagram A 1 9 HM264ALSP 12 Pin Diagram...

Page 186: ...ration PD781 0 781 1 Port Functions GA E05A15HA Port Functions GA E05A15HA Control Functions GA E05A16GA Port Functions GA E05A16GA Control Functions GA E05A16GA Initialized State HM27256 EP ROM Signal Status HM6264ALSP 12 Signal Status STK6722H Terminal Functions Connector CN1 Pin Assignments Connector CN2 Pin Assignments Connector CN3 Pin Assignments Connector CN4 Pin Assignments Connector CN5 P...

Page 187: ...55 Switching Regulator X440072350 1A Table A 2 Transistor List Transistor Name I Description I Part Number I Location 2SC3987 j 6O 1OV 3A 2W X302398709 I Q1 Q9 Q16 2SA1 450 80V 500mA 600mW I X 3 0 0 1 4 5 0 0 9 I Q1O 12 2SC3748 I 60V 1 0 A I X302374809 I Qll 2SC3746 I 60V 5 A I X302374609 I Q13 2SB765K I 120V 3A 1 5W I X301 O7653O I Q15 2SB1318 I 100V 3A 1 2W I X301131809 I Q17 2SD560 4 I 120V 5A ...

Page 188: ...riority levels and 6 interrupt addresses General purpose serial interface asynchronous synchronous and 1 0 modes 1 0 line 781 1 40 bit 1 0 port 78 10 24 bit edge detection 4 inputs Zero corss detection Standby function Built in clock pulse circuit NMOS Figures A 1 and A 2 illustrate the 78 10 781 1 HG microprocessor and Tables A 3 through A 6 describe its functions PAO PA 1 PA2 PA3 PA4 PAS PA6 PA7...

Page 189: ...REV A Q v 1A PORTF H PORTD H PORTC I I PORTB PORTA I m 1 I IL m 1 1 Figure A 2 pPD 7810 7811 Block Diagram A 3 ...

Page 190: ... Port Port Port Port Port Port Port 256 bytes max Port Port Port AB 11 AB 10 AB9 AB8 4K bytes Port Port AB 13 AB 12 AB 11 AB 10 AB9 AB8 16K bytes max AB 15 AB 14 AB 13 AB 12 AB 11 AB 10 AB9 AB8 60K bytes max Table A 5 pPD781 O PF Operation f a MODE 1 MODE O PF7 PF6 PF5 PF4 PF3 PF2 PF1 PFO External Memory o 0 Port Port Port Port AB 11 AB 10 AB9 AB8 4K bytes max o 1 Port Port AB 13 A B 1 2 AB 11 AB ...

Page 191: ...AN7 4 can be used as the input terminals to the detect the leading edge and to set the test flag upon detection of the trailing edge 42 VAref In Reference voltage 43 AVCC Analog Vcc 44 RD out Read strobe LOW at the read machine cycle and at reset HIGH at other times 45 WR out Write strobe LOW during the write machine cycle and at reset HIGH at other times 46 ALE out Address latch enable Latches th...

Page 192: ...hese two signals is performed at T4 The WR signal is output from the middle of T 1 to the beginning of T3 The address and ALE timing is the same as that for memory read however following address output AD7 O PD7 0 are not disabled and write data is output at AD7 O at the beginning of T1 and the end of T3 NOTE When PD7 O are set to the multiplexed address data bus AD7 0 to the address bus AB7 0 the...

Page 193: ...r print data and automatically activates the half dot protection circuit it can protect the printhead from damage due to programming mistake or a malfunction Automatically switches the phases of the carriage motor and paper feed motor using the external clock signal EM Jl CS4 CS3 CS2 Cs 1 P4 P3 P2 PI Po PFA PFB PFC PFD HDl HD2 HD3 HD4 HD5 HD6 HD7 HD8 N C Vss PWD CRA CRB CRc CRD CTRGO Voo WC DB7 DB...

Page 194: ...itching Phose Switching Circuit Circuit 4 Address Latch DBO 3 DBO 3 DBO i AO D 7 A AO Z Function Ist 2nd Decoder B Half 1 y Protec y F HI F J t ion F IJ Circuit 9 A 5 Chip Seiection c l A 12 7 3ecoder C4 I J A 13R Figure A 7 GA E05A15HA internal Block Diagram A 8 ...

Page 195: ...26 PWD IN Print Drive Pulse 27 CRA 1 J OUT Motor Control Port Carriage Motor 30 CRD 31 CTRGO OUT Cartridge output signal 32 VDD 5V 33 P5 OUT output Port 34 WR IN Write Strobe signal 35 RD IN Read Strobe signal 36 Al 3R 37 Al 4R OUT Address output signal 38 HD9 OUT Printhead Data 9 39 Al 2 J 1 IN Address Input signal 42 Al 5 43 AO J OUT Address output signal 45 A2 46 CTRG IN Cartridge signal 47 RST...

Page 196: ... Signal Name Direction Function 51 A3 J OUT Address output signal 55 A7 56 DBO J IN OUT Input Output Data Bus 6 0 DB4 61 DB5 J IN Input Data Bus 63 DB7 64 VDD 5V NOTE Direction refers to the direction of signal flow as viewed from the gate array A 1 O ...

Page 197: ...ol O Automatic control Bit O Automatic half dot protection 1 Enable 2 Disable OIH READ Read data from PO P4 Bit 7 5 Not used Bit 4 P4 Bit 3 P3 Bit 2 P2 Bit 1 P1 Bit O PO WRITE Write data to P5 Write P5 data to the mode register bit 5 02H READ Clear 1st printhead data buffer WRITE Clear printhead data 9th bit Head Data bit 7 03H READ Clear 2nd printhead data buffer WRITE Set printhead data 1st 8th ...

Page 198: ...dress READANRITE Control Functions 05H READ Read carriage motor phases Bit 7 4 Not used Bit 3 A phase Bit 2 C phase Bit 1 B phase Bit O D phase WRITE Set carriage motor phases Bit 7 4 Not used Bit 3 A phase Bit 2 C phase Bit 1 B phase Bit O D phase A 1 2 ...

Page 199: ...trobe signal and sets the BUSY signal HIGH inputs and outputs other control signals When a serial interface is used multiplexes the two receive data lines RXD and the seventh bit of the 8 bit parallel interface using internal logic and outputs the result to an external device Logically ANDs the two external reset signal inputs using internal logic and output the result to an external device one ch...

Page 200: ...d B1 dlrectlan SW data bus DO I euffer l Data Su scrlpt latch Generatar b I 1 J Data latch ltallc chaacter Oeneratar I AO Al A2 OOWR I 07WR auffer Data latch I Eli auffer Data latch L 1 aufter Data latch L T La c RXDIN Gate Array Internal Reed RSTIN1 t RSTIN2 P PO Pf PC P l PO AC au ml PE RX RS i Figure A 9 GA E05A16GA Internal Block Diagram A 1 4 ...

Page 201: ...signal input port The parallel data from host computer is latched by STRB signal 15 I STRB I IN 17 IN 1 IN 18 I NO Parallel data input port The data from the host computer is latched when the strobe signal is input 19 RSTOUT OUT Reset signal output port 20 BUSY OUT Busy signal output port 21 I ACK I OUT I Acknowledge signal output port 22 PE OUT Paper end signal output port 23 ERR OUT Error signal...

Page 202: ...57 Cs IN Chip select signal 58 RD IN Read strobe signal 59 WR IN Write strobe signal 55 DBO Multiplex tri state data bus bit 0 3 J IN OUT The data is output when RD signal is low 63 DB3 64 VDD IN 5V NOTE1 Direction refers to the direction of signal flow as viewed from the gate array f A 16 ...

Page 203: ...tched in gate array WRITE Write interface parameter to interface control port Bit 7 Print data O 1 bit is print data 1 O bit is print data Bit 6 Acknowledge signal O inactive state 1 active state Bit 5 Busy signal O High level is active state 1 Low level is active state Bit 4 Software Busy signal O Software Busy state 1 Ready state Bit 3 ERR signal O inactive state 1 active state Bit 2 PE signal O...

Page 204: ...nerator DB7 O Super Subscript generator 07H READ Read data from the parallel data latch IN7 O DB7 O WRITE Write data to the Super Subscript generator and port D DB 1 2 PD 1 2 This gate array logically ANDs the two external reset signal inputs using internal logic then outputs the result to an external device one channel and resets the ports internally Table A 1 1 shows the port settings after they...

Page 205: ...ess Chip enable OE Output enable DO D7 Input Output data Vcc GND Vpp Vpv 1 26 Vcc 4 2 2 n A14 A7 3 26 413 46 1 2S A 8 A5 5 2 A 9 A4 6 23 A It A3 7 22 TE A2 e 21 AIO A 9 A o 10 19 D7 00 11 16 06 D 1 12 17 05 0 2 1 3 16 04 GND 14 15 03 Figure A 10 HM27256G 25 Pin Diagram Dato Out Put o Do D7 6F Output Enable iF output Buffer Chip Enable E f Y Decode 1 Y Select Address lnpW AO Ai4 Memory X Decode Ce ...

Page 206: ...isable L H x Vcc Vcc High Z Standby H x x Vcc Vcc High Z High Performance Program L H x Vpp Vcc D in Program Verify H L x Vpp Vpp D out Optional Verify L L x Vpp Vpp D out Program Inhibit H H x Vpp Vcc High Z Identifier L L vH Vcc V X Code NOTES 1 X Don t care 2 VH 12 OV 0 5V 3 VCC 0 6 7V 4 Vpp 0 6 14V 4 A 20 ...

Page 207: ...Functions AO Al 2 Input address W E Write enable w Output enable W CS2 Chip select DO D7 Input Output data NC No connection NC 1 A12 2 A 6 4 A5 5 A 3 7 A 2 8 A l 9 AO 10 DO 11 DI 12 D2 13 Ii 28 VOD 27 26 CS2 25 A8 24 A 9 2 0 6 4 23 All D 22 G B 21 AIO 20 WI D 19 1 7 D 18 D6 B 17 05 16 D4 D 15 D3 1 4 Figure A 1 2 HM6264ALSP 12 Pin Diagram j a U J ll_ l A l l 4 R o w Gala A12 7 Csl D cst cs2 Cmlml a...

Page 208: ...A 1 3 HM6264ALSP 12 Signal Status WE Csl CS2 OE 1 0 Terminal Mode x H x x High Z Power down H L H H High Z Output disable H L H L Data out Read cycle L L H H Data in Write cycle 1 L L H L Data in Write cycle 2 A 22 ...

Page 209: ...is a pulse width modulation control circuit Ic Figure A 1 4 shows the NJ M2355 internal circuit diagram IN IN IN IN FEED E POWER BACK Vcc c z GND CONTROL m m m m m m m c P L V S t El Vref CT RT IN IN FEED 12 EA SY J M BACK CONTROL c l Figure A 14 NJM2355 Internal Circuit Diagram A 23 ...

Page 210: ...n uni polar constant current chopper driver IC for the four phases stepper motor I I 1 2 3456 18 Figure A 1 5 STK6722H Pin Diagram I 1 II I m D1O nls Q 9Z t4 Is 4 cQJ I 011 082 I I7 07 DO Jw_ 1 1 n t 4 8 L d 1 _l L mm I I I I f Figure A 1 6 STK6722H Internal Circuit A 24 ...

Page 211: ... phase A drive pulse 6 IB In CR motor phase B drive pulse 7 OB out CR motor phase B drive 8 Vref In Reference voltage for CR motor phases 9 VCC2 In 5V DC internal circuit power 10 Vss GND 11 N C Not connected 12 Oc out CR motor phase C drive 13 Ic In CR motor phase C drive pulse 14 ID In CR motor phase D drive pulse 15 OD out CR motor phase D drive 16 C CD out CR motor phases C and D common 17 P D...

Page 212: ...7 4 N LED1 O T 18 20 14 12 10 8 6 4 2 19 17 15 13 11 9 7 5 3 1 16 BUZZER GND ON LINE SW FORM FEED SW LINE FEED SW LOAD EJECT SW DRAFT SW PICA SW CONDENSED SW ON LINE LAMP READY LAMP PAPER OUT LAMP DRAFT LAMP ROMAN LAMP SANS SERIF LAMP PICA LAMP ELITE LAMP PS LAMP CONDENSED LAMP 5V PGPNL BOARD Control Panel Y461 501000 Figure A 1 7 PGPNL Board Circuit Diagram A 26 ...

Page 213: ... k J j n Ra L I 018 119 D i I G 8 I 25 26 CN2 J R36 PEGX BOARD I Zolo R70 I Figure A 19 PEGX Board Component Layout A 29 ...

Page 214: ...REV A Figure A 20 FX 850 Exploded Diagram 1 A 30 ...

Page 215: ...REV A Figure A 21 FX 850 Exploded Diagram 2 A 3 1 ...

Page 216: ...REV A 568 Figure A 22 FX 850 Exploded Diagram 3 A 32 ...

Page 217: ...ACTOR ASSEMBLY RIGHT Ref No 523 524 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 544 545 546 547 548 549 550 551 552 533 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 580 581 582 583 584 585 586 587 588 589 590 591 592 Description PAPER SUPPORT TRACTOR GEAR TRACTOR UNIT COVER SPROCKET GUIDE SHAFT PAPER TENSION UNIT PAPER TENS...

Page 218: ...REV A Figure A 23 FX 105O Exploded Diagram 1 A 34 ...

Page 219: ...REV A 9 582 565 Figure A 24 FX 105O Exploded Diagram 2 A 35 ...

Page 220: ...REV A Figure A 25 FX 105O Exploded Diagram 3 A 36 ...

Page 221: ...SSEMBLY RIGHT Ref No 523 524 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 544 545 546 547 548 549 550 551 552 533 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 580 581 582 583 584 585 586 587 588 589 590 591 592 Description PAPER SUPPORT TRACTOR GEAR TRACTOR UNIT COVER SPROCKET GUIDE SHAFT PAPER TENSION UNIT PAPER TENSION FRA...

Page 222: ...Ir I u I I I 1 Figure A 26 FX 850 Case Outline Drawing A 38 ...

Page 223: ...150 1 6 4 116 I m 111 I l l u u u t I 1 I 1 l 605 4 1 I h rI I Figure A 27 FX 1 050 Case Outline Drawing A 39 ...

Page 224: ...S Unit 3 17 Rodborough Road SINGAPORE PTE LTD Frenchs Forest NSW 2086 Australia No 1 Raffles Place 26 00 Phone 02 452 5222 Oub Centre Singapore 0104 Telex 75052 Phone 5330477 Telex 39536 EPSON ELECTRONICS TRADING LTD EPSON ELECTRONICS TRADING LTD 25 F Harbour Centre T A I W A N B R A N C H 25 Harbour Road Wanchai 10F No 287 Nanking E Road Sec 3 Hong Kong Taipei Taiwan R O C Phone 5 8314600 Phone 0...

Page 225: ... EPSON ...

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