Heathkit H14 Manual Download | Manualshive

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Summary of Contents for H14

Page 1: ... c HEATHKIT MANUAL for the LINE PRINTER Model H14 OPERATION HEATH COMPANY BENTON HARBOR MICHIGAN ...

Page 2: ...eaB dillnbutora TECHNICAL CONSULTATION Youwdl ecelvelreeconsultalionon any problem you might encounter Iflltleassemblyoruse oIyOlJr g Heathkit prOduct Just GrOp us ne or give lit a call Sorry we cannot accept colItICi caUs NOT COVERED The correction of assembly arrOl S adjustments cahbrahOfl and damage due to misuse abUse or negligence are covllll lId by th warranty Un01 eorroIIve soldOI and or he...

Page 3: ... Heathkit Manual for the LINE PRINTER Model H14 OPERATION 595 2 73 02 HEATH COMPANY BENTON HARBOR MICHIGAN 49022 Copyrigh1 1971 Heath Company AJI Rights Reserved Prtnled In he United 01 Amerk e ...

Page 4: ... 6 Maintenance 15 Circuit Description 16 Recalibration 19 In Case of Difficulty 21 Troubleshooting and Repair Precautions 22 Troubleshooting Chart 23 Step by Step Testing _ 26 Circuit Board X Ray Views _ 29 Semiconductor Identification Charts 30 Parts List 37 Schematic Fold in ...

Page 5: ...d timing Either RS 232C or 20 mA current loop serial interface user selectable Both upper and lower case characters Handshake control signals Full 96 character ASCll font Sprocket paper feed with adjustable spac ing Paper out and jammed detectors that pre vent damage or loss of data or both Electronic form controls The modern design assures excellent reliability and the handsome styling complement...

Page 6: ...cters inch 80 columns 12 characters inch 96 columns 16 5 characters inch 132 columns 10 and 16 5 characters inch are both hardware and software selectable 12 characters inch is software selectable only Initial time per full line is approximately 1 75 sec onds on 60 Hz power line and 2 1 seconds on 50 Hz power line Print head temperature is monitored after each line and then limited by slowing or s...

Page 7: ...232C or 20 rnA current loop Handshake control signals reverse channel or busy signal 25 pin male EtA connector on 6 foot cable Asynchronous bit serial 1 start 8 data 2 stop bits on 110 baud and 1 stop bit on all olhers ASCII 256 Characters 110 150 300 BOO 1200 2400 or 4800 18 1 3 W x 14 1 3 D x 4 4 5 H 4B 5cm W x 36 3 cmD x 12 1 cmH less paper tray 25 lb ll 3 kg 10 C to 40 C 100 135 volts 50 60 or...

Page 8: ...d Refer to your serial interface manual for information on how to set baud rates addressing vector inter rupts and signal levels on the serial card Refer to your Software Manual under System Configuration for information on where to set the serial and address PORT and vector interrupt to communicate with this Line Printer PRINTER BAUD RATE SELECTION To select a desired baud rate place sections 5 6...

Page 9: ...the installation of jumper wires between 101 and J102 and J105 and J106 20 rnA Current Loop The Schematic Diagram and previous cable lead iden tification chart indicate the polarity of current loop signals for passive operation For active operation the polarities of lhese signals are reversed Remove the passive loop jumper wires and then install jum pers between Receiver Voltage drop marking Spaci...

Page 10: ... 9 10 11 12 13 15 16 17 18 19 20 21 22 23 2 25 Black Red Orange Black white Black green Black blue White red White blue Not Used Not Used Not Used Not Used Not Used White Green Blue Black red Black orange White black White green Not Used Not Used Not Used Not Used Not Used Protective ground P GND RS 232C Serial Output S OUT RS 232C Serial Input S IN Request to send RTSl Output Printer Busy Clear t...

Page 11: ...te When the Printer s line buffer is full the RTS line goes to the on state and will remain there until the buffer can accept more characters When RTS goes on there is room for sixteen more characters in the buffer An additional handshake signal is generated in the form of control Q and control S which is transmitted on the regular data output channel When the line buffer is full the RTS output go...

Page 12: ...It is necessary to reset the form parameters whenever power is intel fupted FEED REVerse switch SW7 Pull lightly on the paper to prevent emming Operation is the sam e as FEED FWD except for the direction of food TOP FORM switch SWS When power is turned on top of the form is initialized The Printer assumes that the paper is positioned at the top of the next form Use the FEED switches and advance th...

Page 13: ...ine voltage as follows 2 Open the paper hold downs by lifting them away from the center of the paper NOR range ll5 Vto 135 Vrms or230 Vt0270 V rms LOW range 100 Vto 120 Vrms or 200 Vto 240 V rms 3 Place the paper as shown and feed it through the opening at the rear of the top cover under the paper guide and between the ribbon and platen NOTE Using multiple copy forms is not recommended NOTE If you...

Page 14: ... Use the FEED FWD switch and advance the form to the desired length 4 Release the TOP FORM switch 5 Press the ON LINE switch to the IN position The form depth has now been reset RIBBON INSTALLATION To install a ribbon 1 Turn off the Printer 2 Refer to Pictorial 5 and manually move the print head to the approximate center of the platen 3 Remove the old ribbon by lifting the two spools from the two ...

Page 15: ...t SO DESCRIPTION DECIMAL MNEMONIC DESCRIPTION MNEMONIC VALUE _0 WOflO 000 סס oo Null 100 0000 At Sign 000 DO Start of Haadlllr tOO OOOt Let ter A 000 00 lin Start of Tart 100 0010 LetterB 000 OOtt lDd of Tnt tOO 0011 L tt rC 000 0100 End of Tran dl l loll 100 0100 Letter 0 000 0101 Enqu1r r 100 0101 L tt r E 000 OttO I AcknowlM TO 100 0110 L u r 000 0111 Bdl 100 0111 L tt r G 000 000 Baoupac n 100...

Page 16: ... spacing to 6 lines per inch This is the normal line spacing which will be activated upon power up Use this code to return to this normal spacing after modifying the spacing to 8 lines per inch by a previous software command ESC lower case y Set Iinc spacing 10 8 IiDes per inch This code when received will cause the printed lines to be spaced to 8 lines per inch Print Conlrols for proper operation...

Page 17: ...of operation 5 cartons of paper oil the head carriage as shown in Pictorial 7 Use a high grade light machine oil At this time also clean any accumulation of dust and dirt from the head support shafts head cooling fins and the curved area between the paper guide and chassis near the paper out detector left end ofguide CARRIAGE Oil PORT lOlL HERE FELT WICK RIBBON SPOOL GREASE GREASE RIBBON SPOOL PIC...

Page 18: ... supplies 20 01A ofcurrent when used in its active mode EIA input signals are converted to TTL levels by U103 Ul02 converts TTL output signals into 20 rnA loop signals and U104 converts TIL output signals into EIA output signals UART The UART is a programmable device that is control led by microcontroller Ul06 It uses the 2 MHz clock signal from divider Ul07 and generates selected baud rates by it...

Page 19: ...output goes high This allows current to flow through 0111 to the gate of Ql17 and turn it on Capacitor Cl09 makes Ql17 less susceptible to noise pulses Because the three drivers are identical only one of them will be described PRINT HEAD DRIVERS HEAD AND RIBBON MOTOR DRIVERS PAPER MOTOR DRIVERS Because the seven driver circuits are identical only one driver circuit will he described Buffer U1140 i...

Page 20: ...y the current and c apacitorC2 filters it The supply is unregulated 12 Volt Diode 0124 half wave rectifies the current and capacitor Cl13 filters it The supply is unregulated 5 Volt Vt is a three terminal device that changes the 12 volts to 5 volts and limits its output to one ampere POWER UP DOWN CIRCUIT This circuit keeps power from being applied to the head and motor drive circuits until the 5 ...

Page 21: ... Page 19 l _ RECALIBRATION PICfORIAL 8 ...

Page 22: ...ide them out of the way Move the print head sideways as necessary and insert the 015 feeler gauge between the nose of the print head and either end of the platen See Part A of Pictorial 9 Use a screwdriver and adjust the platen See Part B of the Pictorial The feeler gauge should slide between the print head and platen but there should be a slight drag on it As before adjust the other end of the pl...

Page 23: ...When the line cord is connected to an AC outlet hazardous voltages are present at several places inSide your Printer See Pictorial 11 II I DANGER HIGH VOLTAGE AREA L _ c r o I I DANGER HIGH VOLTAGE AREA I I 1 r I lb d l dMo J 1 PICTORIAL 11 ...

Page 24: ...ge from excess voltage and cur rent than many other parts 3 Do not remove any components while the unit is turned on 4 Use a voltmeter with a high input impedance when you measure voltages 5 Never apply 5 volts or ground potentials tothe output of any IC 6 When you make repairs make sure you elimi nate the cause as well as the effect of the trouble If for example you fmd a damaged resistor be sure...

Page 25: ... Ul09 Ul06 Iett hand stop motor kee9s running dutch slipping 2 Motor lead CO II I8Ctions Upon power up head rT IO 8 to1tIe right and then stops 1 03 Ul09 Ul06 Ul1SA 0117 0111 Does not retum to lett margin 2 Head motor Top raw of dots missing in printed characters 1 Ul140 U106 0103 0104 2 Plint head Seoond raw of dots missing In primed characters 1 U114E Ul06 0105 0106 2 Prim head Third raw of dots...

Page 26: ...ocket to paper guide 3 Paper too transpard Printer wi not go oft Hne ft SW4 U 09 High Temp lED is on Printer wiM not Jumper from J1 8 to Jt 9 II lnstaIecl print print head is cold from J118 to J117 calibrate position 2 U1178 3 Print head Test wori s but no printing Is done t U103 U105 on Une connected 10 RS 232 source 2 Signal source and Printer on different baud fate 3 Incorrect I O wiring no sig...

Page 27: ...ome running daNle8a 109 10 bottom 2 3 Worn or dried ribbon Uneven character spacing 1 Heed motor dutch heed motor 2 Q118 0117 3 Binding on head carriage or loose drive cable c nar cters are not of uniform darkness 1 Incorrect adjustment cA platen to llal lU line head apec ing 2 Bent pl8ten or head support shafts 3 Ribbon not in place 4 Worn or dried ribbon 0 1 INC S 3 4 7 I I rs 7 S t I I I I I I ...

Page 28: ... voltmeter Momentarily connect the free end of the 5 wire to pin 31 of socket Ul06 The print head should move from left to right If not check U1150 0118 0112 C5 Tl and the head motor Momentarily connect the free end of the 5 wire to pin 32 of socket Ul06 The print head should move from right to left If not check Ul15A Q117 0111 C5 and the head motor Momentarily connect the free end of the 5 wire t...

Page 29: ...d at least 2 to the right LED102 should now light If not check U109 and Q3 Connect the 11 wire to socket U106 pin 5 with the S wire still connected to Ul06 pin 37 LED102 should light Now insert a piece of paper with the sprocket holes removed into the paper feed channel Push the paper as far to the left as possible LED102 should now go off If it does not check LED3 Q2 and U109 With the 5 wire stil...

Page 30: ...hould move forward approximately 02 and reconnect the 1 2 bare wire between 118 inches one step Then hold the FEED FWD and 119 switch down The paper should continue to advance in full line steps after a short delay If Press the POWER switch to the ON position not check UI09 UI06 and SW6 TheHlGH TEMP indicator should not light Ifit does light check U117 U1160 and U116E I Press the FEED REV switch T...

Page 31: ...X Ray view B Locate this same number in the Circuit Component Number column oflhe Parts List in the front of this Manual Adjacent to the circuit component number you will find the PART NUMBER and DESCRIPTION which must be supplied when you order a replacement part 1103 R112 1 Vl01 These components are not installed in your circuit board MAIN CIRCUIT BOARD Viewed from the component side ...

Page 32: ...Ol09 56 56 lN4149 0101 0102 0111 0112 0113 0126 0127 ZD101 ZOl02 56 605 lN4746A IMPORTANT THE BANDED END OF DIODES CAN BE MARKED IN A NUMBER Of WAYS ZOlO3 ZDl04 ZOl05 lOl06 Z0107 ZOl08 2 N5229 57 2 3A1 0118 0119 v 0121 0122 BANDED END 0123 0125 0103 0104 57 65 lN4002 0105 0106 0107 0106 0109 0114 0115 0 6 0117 0124 LEOt LED2 412 616 FlVI17 o LII LEOtOl LED102 C lHOO LE03 412 635 TIL 32 o ...

Page 33: ...EMITTE 02 417 919 TIL 78 COLL CrOR Optron Inc OPB813 03 150 74 _ no 0 SPX187 J I l I I HEI Inc eQS 2A1 0101 0124 417 865 MPSA55 0125 0129 R 0103 0105 417 864 MPSA05 0107 0109 0111 0113 C 0115 0126 0127 0128 417 801 MPSSOl 0102 417 897 selected o S G C l 0104 0106 417 263 SlE607 0108 0110 0112 0114 0118 B SIDE ...

Page 34: ...8 57 612 0119 H103SG G I 0120 0121 41HI52 TIP 31 0122 0123 w c Transistors Conl d Page 32 _ INTEGRATED CIRCUITS COWOHENT Ul HEATH PART NUIIIIER MAYle REPLACED WITH IDEHTlFlCAnON OR METAL INPU1 GND OUT PUT GND OUT PUT U101 U102 U o 795 4N26 75189 748 ANoar I BA Sf COlLfC lOR ...

Page 35: ...Page 33 L _ Integrated Circuits Conl d COIIIPOHEHT U 04 U105 HEATH PART _ Eft MAY BE REPlACED WITH 75188 8250 IDEHT1f1CATlON ...

Page 36: ...t d r C QM P QN E NT H EA P AA T T y A y E r DE NTl Fl C A Tl QN NUMBER REPLACED wrnt 3870 available only from Heath Co U 06 I I I TOP VIEW U107 70474 1 I CLEAR CLEAR A o o 1 PRESET PRESET CLOCK Q 0 0 CLEAR IC126 v U106 28 74lSOO GND ...

Page 37: ...5 Integrated Circuits Cont d COMPONENT U109 U110 Ul11 Ul12 U113 HEATH PART NUMBER 443 791 443 805 443 721 MAY BE REPLACED WfTH 74LS244 74LS273 2112 2 IG IDENTlF1CATlON o 0 CK CLEA R U114 Ul15 Ul16 443 73 7416 ...

Page 38: ... Page 36 a Inlegraled Circuits Conl d COMPONENT U117 U201 U202 Hunt PART NUMBER 442 616 yBE REPlACED WITH lM3302 LM2901 Am s8lected 7 74122 IDENTlACATlON Vee ...

Page 39: ...100 kn Rt1S 1 20 1 330 n watt 10 Al52 6 122 12 12000 Rtt6 5 122 12 12000 Al53 6 122 12 12000 Al17 6 122 12 12000 Al54 6 122 12 12000 R11S 1 20 1 330 n watt 10 Al55 6 122 12 12000 Rn9 6 122 12 12000 Al56 6 122 12 12000 Al20 NOT uSeD R157 6 122 12 12000 A121 6 122 12 12000 Al56 6 122 12 12000 Al22 1 20 1 330 n 1 watt 10 R159 6 122 12 12000 Al23 6 122 12 12000 Al60 NOT USED R124 6 122 12 1200 0 Rle1 ...

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Page 43: ... voltage readings and any other infor mation you think might be helpful Please do not send parts for testing unless this is specifi caily requested by our Consultants Hints Telephone traffic is lightest at midweek please be sure your Manual and notes are on hand when you call Heathkit Electronic Center facilities are also available for tele phone or walk in personal assistance REPAIR SERVICE Servi...

Page 44: ...HEATH I N HEATH COMPANY BENTON HARBOR MICHIGAN THE WORLD S FINEST ELECTRONIC EQUIPMENT IN KIT FORM LITHO IN U S A ...

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