IBM 5251 Series Maintenance Information Manual Download

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Summary of Contents for 5251 Series

Page 1: ...SY31 0461 3 _ IBM 5251 Display Station Models 1 and 11 Maintenance Information Manual...

Page 2: ...SY31 0461 3 _ IBM 5251 Display Station Models 1 and 11 Maintenance Information Manual...

Page 3: ...rator s Guide GA21 9248 IBM 5251 Display Station Models 1 and 11 Maintenance Analysis Procedures SY31 0571 IBM 5256 Printer Operator s Guide GA21 9260 IBM 5256 Printer Maintenance Information Manual S...

Page 4: ...fic DANGERs Line voltage is present at the power supply and the display assembly High voltage is present at the cathode ray tube The cathode ray tube could implode if it is hit or if it falls The gree...

Page 5: ...ter maintenance restore all safety devices such as guards shields signs and grounding wires 12 Each Customer Engineer is responsible to be certain that no action on his part renders products unsafe or...

Page 6: ...1 1 1 1 1 1 1 2 1 3 1 4 1 5 1 7 1 8 1 8 1 8 1 9 1 9 1 10 1 10 1 10 1 12 1 15 1 15 1 15 1 15 1 15 1 19 1 19 1 19 1 19 1 23 1 23 1 23 1 23 1 26 1 27 1 27 1 27 1 29 1 29 Service Aids Tools 121 Light Pen...

Page 7: ...1 69 1 69 1 69 1 70 1 70 1 71 1 73 1 75 1 76 1 77 1 77 1 77 1 78 1 78 1 78 1 78 1 78 1 78 1 79 1 79 1 79 1 80 1 80 1 80 1 80 1 81 1 81 1 83 1 83 1 83 1 83 1 86 1 89 1 89 1 89 1 90 1 91 1 91 1 91 1 91...

Page 8: ...Read Data Word 5 4 Selector Light or Pen Feature 5 5 Theory of Operation 5 5 APPENDIX A DISPLAY STATION SETUP INSTRUCTIONS A 1 SETUP INSTRUCTIONS SECTION 1 A 1 SETUP INSTRUCTIONS SECTION 2 A 2 APPEND...

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Page 11: ...matrix is 16 dots high by 8 dots wide Glossary of Tenns and Abbreviations character window A part of the display screen that is 24 dots high by 10 dots wide and includes the character matrix clicker...

Page 12: ...it is released mandatory Something that must be done or must be present menu A list of options that can be selected microfarad One millionth part of a farad microinstruction A basic or elementary mach...

Page 13: ...t stores those limited parts of data needed by the system to execute input output storage processing and control operations related Having a common use required See mandatory resolution The visual qua...

Page 14: ...ch is a part of the Cable Thru feature on a display station theory A section of this manual that includes data flow functional units and features transfer To move from one person place or thing to ano...

Page 15: ...Capacitor of Flowchart V Off Page J J Ground Connector 0 On Page 111 Connector Transformer 0 Decision Block p Relay C Comment r Contact relay Block not energized L D Information Contact relay Block en...

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Page 17: ...placement and adjustment procedures All procedures and drawings have assigned three digit reference numbers Mini MAPs You are sent to mini MAPs to continue the failure analysis to locate a failing fie...

Page 18: ...procedures required to make a new display station operational Appendix B explains the operation of the Self Check feature Self Check is a host system feature INDEX The index is a detailed list of all...

Page 19: ...Display Screen SYstem Cable __ _____ Connector socket 1 Address SWitches Maintenance Procedures Bezel Display Screen Indicators Connector socket 2 Access Panel Cover Keyboard Cable Connector Maintena...

Page 20: ...1 2 101 COVERS OPEN Main Planar Board Display Assembly The covers are sh own pivoted open Power Supply Line Filter...

Page 21: ...ly Fuse AC Distribution 157 Dis aLSign Planar Po r__ _ Control Panel r r 1 I r I I II I I II Keylock 114 0 II I r I I II I E D C B A Plan r Board L J___ J I Internal Keyboard I __________________ Cust...

Page 22: ...ND CARD LOCATIONS B02 D02 Planar Board Pivot f 1 4 B13 D13 B 1 Keylock DOQ lcable Internal System Cable Connector o M f P oe O 0 klJ L O i o e Co Q Feature Cable Panel Station Address Cable Display Si...

Page 23: ...nal twinaxial connector Ensure that a lightning protector card is installed on the new planer if a lightning protector card was on the planar you are replacing 103 Refer to 173 for testing the lightni...

Page 24: ...English 8330748 8330749 Japan Katakana 2767770 2767772 Austria Germany 8330748 8330749 Belgium 8330748 8330749 Brazil 8330748 8330749 Canada 8330748 8330749 Denmark Norway 8330748 8330749 Finland Swed...

Page 25: ...X3 pins are not present on US planar boards without the Multinational Character Set special feature Country Jumper XO X1 X2 X3 U S and Canada off off off on ASCII Inti off off off off Austria Germany...

Page 26: ...e that the screw fits over the lip of the cover to prevent damage to the cover and to ensure that the cover is tightly fastened down To close the covers 1 Pivot the front half of the cover toward the...

Page 27: ...und 8 5 V Contrast Identifier Depression short lead LED Black 5V Control Ground When you replace LEDs align the identified lead white dot flat side or short lead with the yellow wire Terminator Switch...

Page 28: ...I 1 H B02 Sta Adr Bit 6 I 1 H B03 I Sta Adr Bit 7 I 1 H B04 Control Panel Cable Component Line sync _ r JI J LEOs Ready Switches Address switches Brightness Top Tab Contrast Controls b Brightness Con...

Page 29: ...Trace the conditions to the component see above Repair or replace the cable or replace the component Check the circuit for grounds in the cable Were there any grounds at the cable Y N Verify that the...

Page 30: ...114 KEYLOCK MINI MAP I I I I I I l 1 12 Planar Keylock Cable Common N O normally open N C normally closed o 4 Keylock Internal System Cable Connector Unlocked...

Page 31: ...ch in the locked position Does the CE meter indicate an open circuit Y N Repair or replace the keylock assembly Check continuity at the planar end of the cable between the normally closed and the comm...

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Page 33: ...en a card is read by the MSR The reg 25 bit l line will change level when a card is read by the MSR Service Aids The POR line will change level during the power on sequence The display station will no...

Page 34: ...ser I I I I I I I I I I 1 I 1 I I 1 g0 l I I Wire Side I 1 II II o II o II II 0 II o II CJ II o 0 I i I I I 1 D13 813 r 1 1 1 I I J I 1 r 1 1 I J I I I I I I 1 i I I ri 802 1 D02 I 802 I D02 1 I I I I...

Page 35: ...03 105 Probe the ground line on the interposer test pins at connector D of the MSR card Is the line at a Down level Y N A B 115 Inspect the interposer Replace the MSR card 119 A B Power off Disconnect...

Page 36: ...he planar set the jumpers correctly on the new planar 103 105 Probe the reg 25 bit l signal at connector C of the MSR card Are both probe lights Off Y N Check for proper positioning of the jumpers 118...

Page 37: ...d is read by the MSR Service Aids The display station will not be damaged if it is powered on after the MSR cable has been disconnected The MSR test card part number is 8331402 The characters that wil...

Page 38: ...o 0 D CI I i I I I I D13 B13 r 1 1 1 I I J J 1 r I I I I I I 1 1 1 I I J I 1 I I 1 I 1 B02 0 002 802 I D02 I I I i f ij I I I I I B071 IE J BOS IE I J B09 J B10 IE l J B121 l J B131 I 1 I 1 I 1 1 1 I...

Page 39: ...wer on Probe the raw data Signal on the interposer at connector D of the MSR card Is the line at an Up level Y N Replace the MSR card 119 Reconnect the MSR cable Power off Reconnect the MSR cable Powe...

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Page 41: ...is read by the MSR Service Aids The display station will not be damaged if it is powered on after the MSR cable has been disconnected The MSR test card part number is 8331402 The characters that will...

Page 42: ...J I I I i B02 002 B02 002 1 rt Li Interposer Land Patterns rt ij Interposer Land Patterns Reg 5 Bit 0 C B05 B05 l 1 I I 1 8eg 13 Bit 0 Driver Reg 13 Bit 1 Driver Reg 13 Bit 4 Driver Reg 13 Bit 7 Driv...

Page 43: ...the MSR cable Power off Reconnect the MSR cable Power on Probe the five register signals at connector D of the MSR card Are both probe lights off for any line Y N 117 Replace the MSR card 119 Inspect...

Page 44: ...118 MAGNETIC STRIPE READER CARD JUMPERING MSR Card 1 4 and 6 on 2 3 and 5 off 1 26...

Page 45: ...d and the planar 9 Place the planar in the service position 10 Loosen the screw on the plate that covers the line cord This plate is located on the right rear corner 11 Remove the plate CAUTION Ensure...

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Page 47: ...pulsing The POR and reg 25 bit 6 lines are both at an Up level The LP photocell line should be at an Up level Service Aids The display station will not be damaged if it is powered on after the keyboar...

Page 48: ...1 1 J01 4 2 F 006 Ground r 2 F 008 _____ 1 J 003 2 J 003 1 E 008 2 E 008 Planar 5 Vdc Ground _ B_0_4_ _4 __ 2 E B04 I End of Row 1 J B13 I 2 J B13 2 F B02 Vert Blank 1 J 002 I 2 J 002 2 F B12 I I Reg...

Page 49: ...Is the line at an Up level V N Inspect the interposer for an open Replace the planar set the jumpers correctly on the new planar 103 105 A A 1Probe the following lines on the interposer at the 2F sock...

Page 50: ...line at a Down level V N Replace the light pen feature card 125 Inspect the interposer Replace the planar set the jumpers correctly on the new planar 103 105 Inspect the interposer for an open Replace...

Page 51: ...g Aids 212 Conditions After Power On The reg 13 bits 1 2 4 5 and 6 lines are at an Up level The reg 13 bits 0 3 and 7 lines are at a Down level The LNC line is pulsing The LP photocell line should be...

Page 52: ...Reg 13 Bit 4 Reg 13 Bit 5 Reg13Bit3 Reg 13 Bit 6 Reg 13 Bit 7 LNC l E 003 1 E 004 1 E 005 1 E 007 1 E 009 l E 010 1 E 011 1 E 012 l E 013 1 J 007 2 J 007 1 34 Light Pen 013 JOl 5 2 F 012 2 F 013 LP P...

Page 53: ...e correct Y N A Inspect the interposer Replace the planar set the jumpers correctly on the new planar 103 105 A I Probe the LP photocell line at 2 F D13 Is the line at an Up level Y N Power off Discon...

Page 54: ...wer off 1 36 Disconnect the light pen feature card by disconnecting the interposer at connector 1E and plugging it into the planar connector only Power on Press any data character key grey key Probe t...

Page 55: ...bit 2 line should be at an Up level The reg 5 bit lines should be Up except reg 5 bit 6 which should be Down The 1 0 MHz horiz blank and LNC lines should be pulsing Service Aids The reg 13 bit 2 line...

Page 56: ...13 Bit 6 Reg 13 Bit 7 Horiz Blank LNC 1 E D03 1 E D04 1 E D05 1 E D07 1 E D09 1 E D10 1 E D11 1 E D12 1 E D13 1 J D13 t 1 J D07 i I I I I Light Pen Feature Card 2 J D13 2 J D07 Pin 5 I J01 J01 5 2 E D...

Page 57: ...erposer Replace the planar set the jumpers correctly on the new planar 103 105 Replace the 2J cable Replace the 2J cable Inspect the interposer Replace the light pen feature card 125 Power off Wait fi...

Page 58: ...rposer at connector 1E and plugging it into the planar connector only Power on Probe the failing line on the interposer Is the line at the correct level Y N Inspect the interposer Replace the planar s...

Page 59: ...AP example see Troubleshooting Aids 212 Service Aids The display station wi not be damaged if it is powered on after the keyboard MSR or light pen has been disconnected The reg 5 bit l line is used to...

Page 60: ...Light Pen 1 E B03 1 E D08 Power Supply Ground Light Pen Feature Card I J01 component Sid IPin 5 2E I jTo Light Pen Power Supply 2 E B03 2 E D08 J01 4 J01 1 1 42 Light Pen 1 013 I I Tip Switch N C 2 F...

Page 61: ...ature card 125 Use a CE meter to check the operation of the tip switch Does the tip switch operate correctly Y N Replace the Iight pen feature assembly 125 Inspect the interposer Replace the light pen...

Page 62: ...124 LIGHT PEN CARD JUMPERING I 1 2 J 1 44 I Jumper Positions 2 off on...

Page 63: ...on the right rear corner of the machine 11 Remove the plate 12 Rotate the 5251 until only the right rear corner is positioned off the table CAUTION Ensure that the remaining three corners remain firm...

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Page 65: ...rnal Keyboard Cable Keyboard Signal Cable Keyboard 10 Jumper Block IBM 5251 Display Station I J 0 CI 0 0 0 0 l Keyboard Logic Printed Circuit Board Pad Printed Circuit Board Connector Contacts Keyboar...

Page 66: ...crew on each side to hold the assembly in place CAUTION Do not remove the pad printed circuit board while a key is pressed Removing the pad printed circuit board while a key is pressed causes the flyp...

Page 67: ...aining ears must clear the frame as shown Notch 131 133 Installation 1 2 3 Insert the key module Align the opening in the key module with the location lug in the mounting hole The key stem must be pos...

Page 68: ...zer II into the openings in the pivots 4 Press the Spacebar on the key stems II 135 FLYPLATE REPLACEMENT Reinstalling a disconnected flyplate in a key module is not recommended 1 50 If replacement is...

Page 69: ...II 134 135 7 8 9 Push up the tip of the flat spring on the inside of the flyplate spring Move the flat spring down until the tab drops into the opening of the flyplate spring Attach the other end of t...

Page 70: ...Identification chart 142 are correct The display station will not be damaged if it is powered on after the keyboard cable has been disconnected Planar Board Interposer Internal Keyboard Cable Tools C...

Page 71: ...umper block on the logic PC board for a ground Is the line OK Y N Set the 10 jumpers correctly Replace the cable or keyboard logic PC board Inspect the interposer Replace the planar set the jumpers co...

Page 72: ...Internal Keyboard Cable 1 54 The display station will not be damaged if it is powered on after the keyboard cable has been disconnected Tools Connect the CE probe as follows lead 1 G D03 lead 1 G D08...

Page 73: ...Down level Y N Replace the keyboard logic PC board set the jumpers correctly on the new PC board 142 Disconnect the cable at socket B on the planar Is the line still at a Down level Y N Repair or repl...

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Page 75: ...you press a key 138 Service Aids The power on reset line is at a Down level for about 0 5 seconds during power on When you press a key the data strobe line pulses at a Down level When the planar rece...

Page 76: ...003 25 003 5 Vdc 5 Vdc Ground I 1 8 008 I 23 24 0 8 1 58 Keyboard Logic Printed Circuit 80ard 002 Clean both sides of the pad printed circuit board connector contacts 130 5V I I I I I I I I I 4 807 _...

Page 77: ...ne at the keyboard end of the cable A Does the line pulse when a key is held down Y N Check the DELAY strobe line for an open Inspect the 5 Vdc the 5 Vdc and 807 DATA strobe line contacts on the keybo...

Page 78: ...d Suggested action for an intermittent problem Analyze the suspected line inspect all the connector contacts Clean the pad PC board contacts 132 Replacement sequence Logic PC board Planar Keyboard cab...

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Page 80: ...e the lower wire from the connector block and touch a frame ground You should hear a click each time you touch the wire to ground The display station will not be damaged if it is powered on after the...

Page 81: ...not at an Up level answer no to the next question Does the line pulse each time a key is pressed Y N Is the line at a Down level Y N Does the line B03 pulse each time a key is pressed Y N Inspect the...

Page 82: ...display station will not be damaged if it is powered on after the keyboard cable has been disconnected I Interposer I Planar Board I I I I I I I 1 7 T 02 I B02 002 IB02 I I I I I I I Cable Check A I...

Page 83: ...back to ground on the planar Inspect the interposer Replace the planar set the jumpers correctly on the new planar 103 105 Suggested action for an intermittent problem Jumper B02 to 012 If the proble...

Page 84: ...a Down level for about 0 5 seconds during power on The display station will not be damaged if it is powered on after the keyboard cable has been disconnected Planar Board Interposer I Internal I I Ke...

Page 85: ...rt of Call Power off Remove the cable at socket B Power on Is the line at a Down level at the planar Y N Check for a ground in the cable or keyboard logic PC board Inspect the interposer Replace the p...

Page 86: ...0 001 1 101 0 101 0 101 0 101 0 101 0 101 0 101 0 1 01 0 1 01 1 101 0 101 0 101 0 1 010 101 0 101 0 1010 101 0 1010 Data Entry Keyboard Bit Assignment 0123 0100 1000 1 100 1 100 1 100 1 100 1 100 1 1...

Page 87: ...the display mode command functions 13 through 24 or Clear Standard Keyboard Layout 19 7 20 21 22 23 24 Clear 8 9 10 11 12 Test Request The keyboard template is placed in the opening above the top row...

Page 88: ...eys 8000000GJ000G0C 24 88808008000080 GJGGJGGG8G000GUta C 62 J080008G08G 74 J G C 83 80 Data Entry Keyboard Layout 67 Keys 8000000 8 00000 24 80000008000080 GGGJGGJG8G000GUta C62 000008008800 G c 83 8...

Page 89: ...atakana Data Entry Keyboard Layout 69 Keys 80 80 00 08 GJG 8GJGJ8GG8GGG0G0 25 G0G08GG800G0G0 GJGJGGGG0GG808G C 62 GGGJ0BGG0GG00 G0C 83 00 oNot a typamatic key oA makelbreak key Maintenance Procedures...

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Page 91: ...rds The asterisk in scan code position oindicates that the key is a make break key with a bit setting of either 0 or 1 When a make break key is pressed bit 0 of the code is a O When a make break key i...

Page 92: ...11 20 39 00111001 63 OE 00001110 21 3A 00111010 64 01 00000001 22 38 00111011 65 02 00000010 23 3C 00111100 66 03 00000011 24 3D 001 101 67 04 00000100 24 Katakana 61 01100001 68 05 00000101 25 48 010...

Page 93: ...h the display assemblies might look different they are similar and generate the same signals and displays Always refer to the decal on the CRT to locate the adjustments on the printed circuit board If...

Page 94: ...eight Planar Board Connector G t J Decal B 0 Horizontal Width c J In Focus T r r Vertical y Vertical Video Horizontal Brightness Linearity Phase Hold Centering Limiter 1 76 Centering Rings Yoke Clamp...

Page 95: ...embly from the display station housing 7 Place the used display assembly in the shipping container so it can be returned to the branch office Replacement 1 2 Move the rubber shock mounts to the locati...

Page 96: ...Display Verification Menu 3 The Hs on the display screen are of both normal intensity and of high intensity Adjust the Contrast control and the Brightness control for the best display screen image 1 7...

Page 97: ...nearity Phase Potentiometer Adjustment This potentiometer is used to adjust the balanced character height between the top of the screen and the bottom of the screen Horizontal Adjustments Horizontal W...

Page 98: ...ent cannot be made replace the display assembly 151 1 80 FACTORY ADJUSTMENTS CAUTION The following factory adjustments should not be attempted they are described for your information only Focus Potent...

Page 99: ...s the indicator area If there is a raster condition on the display screen ensure that the raster check jumper is removed then perform the Video Adjustments 152 Raster Check CAUTION Power off when inst...

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Page 101: ...hen probing for an open line disconnect the display AC power connector 150 The power supply supplies power through connector G on the planar The planar supplies signals to the display assembly The dis...

Page 102: ...1 G Doa 1 G D12 1 G D13 1 G B 13 Low Voltage Connector 180 1 I I I I I I I I I I I I I I I I I L _______ __ J 1 84 Display Signal Planar Power Cable Display Assembly Printed Circuit Edge Connector 1 1...

Page 103: ...ine pulse now N Check the cable for a grounded signal line Is the cable OK V N Repair or replace the cable Replace the planar set the jumpers correctly on the new planar 103 105 Replace the display Is...

Page 104: ...KKK KKK I KKK KKK KKKK KKKK KKKKKKKKKKKK KKKKKK KKKKK KKKKKK KK KKKKKI KKKK KK _ llllllllllLlllllllllllllllllllllllllL LLllLLL LLL LLLllLL LllllLLLLL LLLLLLLLLLLLLLLL HHHHHHMMMMHMMMMMMMMMMMMMMMMMMMMHM...

Page 105: ...M M 11 M M M M M M M M M I ll M104M _ Nfl r 141IN UU N NIl IJr J I I II1J J 1 1 I J I II II rl l II 1 N I H III I 1111 jN Iii II I N PHI NII It I N II I II I I I I j IN N NN NN 1 1 1 11 r fll fl 1 1 I...

Page 106: ...J W H KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK UlLllllllllllllllllllllllllllllllllllllllllllllllllllllllLLIILLLl Ll LLLl LlLLLLLL _ HMMHMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM...

Page 107: ...o jumpers on jumper position 9 of the main planar board must be removed if the Cable Thru feature is installed on the display station The Terminator switch Cable Thru feature only on the access panel...

Page 108: ...ns of a Cable Thru feature on each work station in the configuration f I I I I I 1 90 Data Flow D Data is entered at the keyboard II Data is transferred to the controller II Data is interpreted by the...

Page 109: ...g an electrical storm Typical Installation r System Controller Work Station Building 1 Outdoor Cable S tatlon Protector The following procedure can be used to check a station protector that is supplie...

Page 110: ...ctors during an electrical storm 1 Visually check the lightning protector for broken wires or land patterns 2 Use only CE meter part 1749231 Use the R x 100 scale a Check row A Check both the top and...

Page 111: ...r Red 2 3 0 6 I Internal System Cable Connector r Diodes RowA c n EJ c n I I GNO ol Cable to Sig 2 5a TP Planar 3 4 Sig Schematic The dotted lines show land patterns on the back of the PC board Row B...

Page 112: ...ly Then slide a clamp nut and clamp gasket over the cable jacket and trim the jacket to the dimensions given Push the wire shield back to expose the inner insulation core and cut the core and conducto...

Page 113: ...llimeters 0 25 inch between conductors 7 8 9 Slide the insulator over the contacts and the cable so that the insulator touches the sleeve Press all the parts together To ensure correct polarity the co...

Page 114: ...jacket shield and insulation to show 9 5 millimeters 0 38 inch of the conductor Slide the nut onto the cable 3 1 96 Insert the conductor into the tapered self clamping sleeve and contact force the ed...

Page 115: ...and Figure showing the maximum permissible dc resistances in the twinaxial coaxial adapter 8004 t Coaxial Center Contact C Twinaxial Contacts 0 t Connector Body Cable Labeling To assist in installatio...

Page 116: ...y side Line Filter attached to the display base under the power supply 1 98 5V Test Point I 8 5V Test Point I Light Pen Power Supply Cord World Trade Terminal Block 50 hertz AC Power Supply Fuse insid...

Page 117: ...ar of the power supply to the base 8 Disconnect the top two wires from the Power switch remember the position of the wires for reassembly 9 Remove the Power switch bracket two screws and the rear cove...

Page 118: ...11 The power cable is part of a cable assembly that carries the display assembly signal lines to the main planar board The power supply supplies power to convector G on the planar by way of the low vo...

Page 119: ...voltage in question Line Voltage Black Voltage 115 White 182 183 184 Line Filter Limits Power Switch 104 to 126 Vac 4 5 Change the setting on the Range switch until the meter heedle is as close as pos...

Page 120: ...ge E13 E14 Transformer Connections Voltage Limits To To To TB 100 Vac 90 to 110 Vac TB 1 TB 2 1 and 5 to TB l 2 and 6 to TB 2 110 Vac 99 to 121 Vac TB l TB 3 1 and 5 to TB l 3 and 7 to TB 3 123 5 Vac...

Page 121: ...ly and the fan assembly 6 Remove the four screws and four nuts that hold the fan assembly to the heat sink assembly Replacement CAUTION Do not crimp or pinch the two voltage wires between the fan and...

Page 122: ...is installed each display station turns this light on even if the poll or data is not addressed to that particular work station The addressed work station returns an error response to the controller...

Page 123: ...he clicker will sound only for the first four keys pressed Additional keys can be pressed but the clicker will not sound If the Status switch is now set to the Test position lines 0 and 25 will be dis...

Page 124: ...position An alternative display of line 25 occurs whenever the last key log position 76 contains the break bit This is a result of pressing and releasing any shift key before or during the time the St...

Page 125: ...ty 23 Reverse image high intensity 24 Underscore 25 Underscore reverse image 26 Underscore high intensity 27 No display 28 Blink 29 Blink reverse image 2A Blink high intensity 2B Blink high intensity...

Page 126: ...m power on to either customer sign on or verification test Cursor is in position D 202 203 Power Switch on System Available indicator is off Line Sync o Line Check o Internal Check o Storage Check Rea...

Page 127: ...Ready Line Sync o Line Check o Internal Check o Storage Check o Ready Line Sync o Line Check Internal Check o Storage Check o Ready o Line Sync Line Check o Internal Check o Storage Check o Ready o Po...

Page 128: ...for normal operation Power on diagnostic switches control to main program End of power on sequence The Line Sync light is on while the controller is polling 204 No data should be present 1 110 The Re...

Page 129: ...ipe Reader Reader Adapter Light Light Pen Pen Adapter To Controller To Next Terminal __c Cable Thru Feature 4 111 0 Test Cable Adapter e I __ 6 Storage Test Read Write Storage Display Adapter I I I I...

Page 130: ...meric keys and most of the function keys If the following function keys are pressed while the display station is in the free key mode error code 0099 will be returned Print Help Rollt Up Roll4 Down En...

Page 131: ...ntation Check with the wstem ope J OI bef or e pI esslf19 the LOdd key Ye Online tests can be run on the work station while other jobs are being run on the system However the work station must be in a...

Page 132: ...ation Manual SY31 0462 I ERAP Option 1 Display Verification Option 1 Prime Option 3 I ERAP Option 7 See the maintenance documentation for the controller Display Verification Option 2 Displayable Chara...

Page 133: ...2 Pressing the Enter key DISPLAY VERIFICATION MENU SELECT OPTION C RETURN TO PRIME OPTION MENU 1 DISPLAY ATTRIBUTES 2 DISPLAYABLE CHARACTERS 3 SPECIFIED INPUT FIELDS 4 FUNCTION KEYS AND FEATURES xx xx...

Page 134: ...nter key This display tests the attributes the Contrast control and the alignment of characters on the display screen How to use this display 1 Turn the Contrast control fully clockwise and slowly dec...

Page 135: ...rd If you have the planar with the country jumpers 105 the following characters will be displayed when you set the Status switch to the Test position First Hex Char 0 o 456 7 8 9 ABC D E F First Hex C...

Page 136: ...7C A1 CO DO EO U S and Canada ASCII Inti Austria Germany Belgium Brazil Canada F rench Denmark Norway Finland Sweden France Italy Japan English Portugal Spain Spanish Speaking United Kingdom e I A E...

Page 137: ...haracters and then press the Field Exit key Numeric Only Key in five numeric characters Dup Key Press the Dup key once The key code of the Dup key will be shown until the screen is written to by the c...

Page 138: ...You can return lines that have rolled off the display screen by pressing the Enter key 3 Observe the intensity of the numbers on the display screen while you perform step 4 206 4 5 Press the Cmd key...

Page 139: ...tached to 08 are not shown It is a system option to show the stations CONFIGURATION DATA LOCAL STATIONS ENTER C TO RETURN TO PRIME MENU DEV ICE ADDR UN IT ADDR CO CO CO CO LOGICAL ID xx xx xx xx xx xx...

Page 140: ...address of the controller Unit Addr is the station s assigned to the controller The first 2 digits are the physical port cable number and the third digit is the station address Logical ID is the name...

Page 141: ...12 SDLC xx xx station 10 can be up to 10 characters Either format is appropriate The top format is a work stat ion only ERAP menu The bottom format is a shared system work station ERAP menu Select th...

Page 142: ...vice on the line is displayed 1 124 If you select the workstation controller option the display stations option or the 5256 printers option you must also select a particular device The I O counter tab...

Page 143: ...key xx xx station 10 can be up to 10 characters ERROR RECORDING ANALYS IS PROCEDURE ENTER 10 OF DESIRED DEVICE XX XX SELECT ONE OF THE FOLLOWING FUNCTIONS ENTER I D OF PRINTER TO RECEIVE OUTPUT PRINTE...

Page 144: ...r key PRESS ENTER TO VI EW NEXT DISPLAY ENTER C TO RETURN TO MAIN MENU I O COUNTER T ABLE FOR DISPLAY STATION W2 COlI DATE LAST RESET NUMBER OF SVCS 00 00 00 6414 END OF TABLE PRESS ENTER TO VIEW NEXT...

Page 145: ...ONT DEVICE 0 1 DATE TIME BINARy YY MM DD HH MM SS 0104 0000 0000 00000000 0100 0001 0000 0000 0000 0000 76 0B 24 04 46 19 0120 0000 0000 0000 0000 0000 1001 0000 0000 0000 0000 76 07 24 02 32 06 END O...

Page 146: ...cable controller and system must be operating correctly The initial program load lPL sign on procedure must be completed before this procedure can be used Start sign on procedure Press and hold the Sh...

Page 147: ...e Controller Host MAP reservedl No response Transmit activity reservedl check Receive parity ch Receive length ch reservedl Even odd timeou eck eck t Busy Line reser parity vedl 0000 0000 0000 0000 an...

Page 148: ...th Check The controller received the wrong number of bytes as a result of a poll or command 0107 Wrong Station Responded An incorrect station address was returned in response to a poll from the contro...

Page 149: ...image size does not match the CRT image size set in the ID word sent by the display station 0184 Incorrect Keyboard ID The keyboard ID received by the controller was invalid 0185 Incorrect Keyboard Sp...

Page 150: ...d a key code that is not valid and does not know what key you pressed 0003 INVALID KEY FOLLOWED CMD KEY 209 You pressed the Cmd key but the next key you pressed was not one of the command function key...

Page 151: ...Exit key to leave the field 0017 MANDATORY FILL FIELD KEY USED INVALIDLY You pressed the Field Field or Field Exit key however the cursor was not in the first or last position of this mandatory fill f...

Page 152: ...e error reoccurs continue without using that MSR card 0036 LIGHT PEN USAGE IS NOT ALLOWED The operator has started entering data into a field can be any field on the display but has not gone from the...

Page 153: ...the power on diagnostic finished however the display station is not in session with the host system If the cursor is in position E the power on diagnostic is finished and the display station is in se...

Page 154: ...ou as much information as possible about the failing circuit It is possible for the symptoms to change or disappear while you are probing an intermittent problem All the diagrams use the same format C...

Page 155: ...iver will cause an Up level at the receiver if the cable is open Is the signal present at the receiver Y N Repair or replace the interposer or cable Is this the last signal line to be checked V N Go t...

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Page 157: ...Preventive maintenance is not needed on the display station Preventive Maintenance Preventive Maintenance 5251 MIM 2 1...

Page 158: ...2 2 This page is intentionaliy left blank...

Page 159: ...rder a kit of metric tools from Mechanicsburg by ordering bill of material 1749235 Note In the display station all metric screws are blue 4 Fiber screwdriver You need a fiber screwdriver to adjust the...

Page 160: ...3 2 lead should not be placed near the high voltage transformer or near the neck of the cathode ray tube 150 Ground Lead CAUTION CQnnect this lead to any signal ground near the probe point Do not use...

Page 161: ...figure shows a configuration of a 5251 Display Station Model 1 or 11 attached to a controller at a system location The number of display stations that are attached to the system is specified during s...

Page 162: ...ed to the controller II Data is interpreted by the controller II Data can be used by the system iii Data is returned to the 5251 for displaying The combined length of cable for each series must not ex...

Page 163: ...lock Magnetic Magnetic Stripe Stripe Reader Reader Adapter Light Light Pen Pen Adapter To Controller G I L_ I O Adapter Cable Adapter Read Only Storage I I I I I 0 ___ 4 Microprocessing I Unit I Read...

Page 164: ...01 Planar 4 4 1 l Keyboard I I I Command I Magnetic Magnetic Stripe Stripe Reader Reader Adapter Light Light Pen Pen Adapter To Controller _ To Next Terminal ___ c Cable Thru Feature or Address 4 Regi...

Page 165: ...keyboard The keyboard identification specifies how the scan code is interpreted Typamatic keys load the character buffer with a scan code for each scan code cycle The typamatic key operates at a rate...

Page 166: ...I G j Microprocessing I Unit ReadIWrite Storage I I I I I I 4 6 o Line Sync G 0 Line Check e 0 Internal Check r Brightness CD 0 Storage Check Control G 0 Ready Contrast Control L _ _ J Horizontal r T...

Page 167: ...the display adapter determines the display position and converts the position into the vertical and horizontal drive signals needed for the cathode ray tube This routine is constantly repeated to ref...

Page 168: ...ness of the field intensified by the intensity field attribute Both controls determine the voltage level of the video signal at the main planar Control Panel Brightness Control I I I I I I I Contrast...

Page 169: ...tarted an operation Input Inhibited indicates that the system cannot process a keyboard scan code A cursor which is controlled by the M PU or controller indicates where the next keyboard character wil...

Page 170: ...ree half bit 0 s is sent to establish frame synchronization After the frame synchronization half bits have been sent the frame is sent the sync bit is sent first 1 Bit Cell c c c c c cccccccccccccc Il...

Page 171: ...ough 110 Sync sync Bit _ ___ _____ ____ Bit _ _ _ o 23456789101112131415 0 2 3456789101112131415 1000lpI1 11x x x x x x x XI1 100 Olpl lx x x x x x x xl1100011111 1 1 11 j I I _____ ____I Last Frame A...

Page 172: ...y station Read Activate 00000 this command is sent after the setup specified by a read command is completed and starts th transmission of requested data 4 12 Write Activate 00001 this command immediat...

Page 173: ...se Write Control Data 00101 followed by 1 data byte which controls the display screen to conditionally reset the exception status control the keyboard clicker during input inhibit control the audible...

Page 174: ...fter the set mode command has been executed The second frame contains a station address which consists of all l s indicating the last message frame and the scan code which is contained in bits 7 throu...

Page 175: ...o o o Bit 14 Description No exception status Null or attribute error Activate command not valid Command or device ID not valid Input queue or storage overrun Register value not valid Power on transit...

Page 176: ...te 2 A write operation is initiated and handled the same as a read operation the only difference is that the data is transferred from the controller to the display station 4 16 Controller 5251 Read Da...

Page 177: ...and decode the frames to determine whether they contain commands or data Received data is moved into the serdes until the sync bit is in the high order position The serdes is stopped To Controller To...

Page 178: ...I O device control area The I O device control area is divided into three parts display control area cable adapter control area and microprocessing unit work area Internal Processing Queue Each displa...

Page 179: ...ter The registers are named the cursor address counter and the reference counter The cursor register controls the location of the cursor on the display screen The address counter register is used to r...

Page 180: ...4 20 Th is page is intentionally left blank...

Page 181: ...t side of the screen Data displayed at the time the Keylock is changed to the locked position is controlled by the application program Keyboard data entered while the Keylock is in the locked position...

Page 182: ...mit a unique address for the work station addresses range from 000 through 110 The fourth sWitch permits termination for the last work station in the series See the Customer System Cable section in th...

Page 183: ...ition and sets the error bit on in all data bytes if an error is found Error conditions checked are No SCM EOM or LRC characters A parity error A speed check or LRC check error The MSR card circuits t...

Page 184: ...st character sent in the read data activate read command sequence is the SOM it is followed by up to 15 data characters If one of the read data words in this sequence does not contain EOM in the chara...

Page 185: ...alue and produce a usable output voltage The light pen logic card contains buffers which are continuously updated with the row and column address of the character that is being sensed The service requ...

Page 186: ...0 25 Ti p Switch Activated Light Pen Installed Bits 0 through 15 are used to send light pen data from the 5251 Models 1 or 11 Bits 7 through 14 are used internally on the 5251 Models 1 or 11 as a data...

Page 187: ...e data byte from the light pen card The binary value of bits 8 through 14 is the column address of the selected field The decimal values of these bits are 64 32 16 8 4 2 Example It o 1 1 0 1 0 1 a col...

Page 188: ...5 8 This page is intentionally left blank...

Page 189: ...instructions go to the Start of Call MAP The setup instructions are written in two sections You can complete Section 1 without connecting the display station to the system Section 2 describes how to c...

Page 190: ...splay station or printer the Terminator switch on the preceding work station must be set to position 2 171 9 Set the Power switch to the Off position 10 Connect the system cable as follows a Insert th...

Page 191: ...position The following conditions indicate that the display station is working with the controller a The cursor is in the upper left corner b The System Available indicator is on c The Line Sync light...

Page 192: ...A 4 This page is intentionally left blank...

Page 193: ...digit by 2 Multiply the tens position of the field by 1 Proceed to the high order position of the field multiply alternately by 2 and 1 Appendix B Self Check Feature 2 Add the digits of the products 3...

Page 194: ...t this character combination is not used in a self check field Example Self check field Multiplier Product Sum of the products Divide the sum by 11 Subtract the remainder from 11 Self check digit Self...

Page 195: ...l panel switch display assembly cable keyboard cable 1 64 clicker 1 62 ID 1 52 POR 1 66 scan codes 1 54 strobe 1 57 voltage 1 57 MSR register 5 1 19 1 10 1 10 1 83 registers 5 and 13 1 23 voltage cont...

Page 196: ...10 mini MAP 1 10 service aids 1 10 troubleshooting 1 11 control registers address counter 4 14 cursor 4 14 diagnostic display locations 1 135 reference counter 4 14 covers keyboard 1 8 covers display...

Page 197: ...Cable Thru 5 2 Keylock 5 1 Magnetic Stripe Reader 5 3 Selector Light Pen 5 5 fiber screwdriver 3 1 field attribute characters field attributes purpose 1 107 4 9 flyplate replacement focus adjustment...

Page 198: ...al 1 49 keyboard identification jumpers 1 68 theory 4 5 1 49 keyboard continued locations access panel connector 1 47 buffer 1 47 connector B 1 47 ID jumper block 1 47 internal cable 1 47 keyboard ass...

Page 199: ...ic part numbers MSR feature card 1 5 planar board with country jumpers 1 6 without country jumpers low voltage connector location 1 5 1 98 main planar board locations cards 1 4 connectors 1 4 message...

Page 200: ...ement 1 103 preventive maintenance 2 1 prime option menu 1 114 printed circuit board location 1 47 1 98 protector station 1 91 raster check 1 81 read activate command 4 12 read base 10 command 4 12 re...

Page 201: ...witch 1 105 storage check LEO 1 104 strobe pulse operation 4 5 system available LEO 1 104 system cable 1 89 system cable and terminator switch 1 89 1 103 template keyboard terminator switch test point...

Page 202: ...or in publication typographical illustration and so on No reply Page Number Error Note All comments and suggestions become the property of IBM No postage necessary if mailed in the U S A Inaccurate or...

Page 203: ...Dept 245 Rochester Minnesota 55901 Fold FIRST CLASS PERMIT NO 40 ARMONK N Y o c o iii 0 iii Q QI r o J 3 o c CD iii QI J C c 5 a Fold Fold 5 IBM J InterRitionai Busine Machines Corporation O ral Syste...

Page 204: ...s Corporation General Systems Division 4111 Northside Parkway N W P O Box 2150 Atlanta Georgia 30301 U S A only General Business Group International 44 South Broadway White Plains New York 10601 U S A...

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Summary of Contents for 5251 Series

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IBM 5251 Series, Maintenance Information Manual

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Summary of Contents for 5251 Series

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