Manual / Guide · 1970
HP 9125A Plotter Service Manual (1970)
The service manual for the 9125A X-Y plotter used with the 9100.
Manual / Guide · 1970
The service manual for the 9125A X-Y plotter used with the 9100.
09125-90008 HEWLETT [V) PACKARD PRINTED IN U.S.A. ; SERVICE MANUAL ; CALCULATOR — PLOTTER NICS _.R ELECTRO 9125A WASTER FILE DO NOT SHIP ll HEWLETT iy PACKARD VSZL6 dH be a epi + +h HEWLETT + PACKARD [& SALES AND SERVICE EUROPE AUSTRIA Unilabor GmbH Wissenschaftliche Instrumente Rummethardtgasse 6/3 P.O. Box 33 Vienna A-1095 Tel: 42 61 81 = eel iene _ 762 BELGIUM Hewlett-Packard Benelux SA. 348 Boulevard Gu Sowverain Brussels 15 Tet: 72 22 40 Cable: PALOBEN Brussels Telex: 23 494 FRANCE Hewlett-Packard France Quartier de Courtaboest Bolte Postale No. 6 91 Orsay Tet: $20 88 O1 Cable: REWPACK Orsay Telex: 60048 Hewlett-Packard France 4 Quai des Etroits 69 Lyon Séme Tel: 42 63 45 Cabdle- HEWPACK Lyoo Telex: 31617 GERMANY Hewlett-Packard Vertriebs-GmbH Lietzenburgerstrasse 30 1 Bertin W 30 Bamburg Tel: 24 05 51/52 Cable: HEWPACKSA Hamburg Telex: 21 53 32 Hewlett-Packard Vestriebs-GmbH Reginfrie¢strasse 13 8 Munchen S Tel- 0811 69 59 71/75 Cable: REWPACKSA Miiachen Telex: 52 49 85 GREECE Kostas Karayannis 18, Ermou Street Athens 125 Tet: 230303 232947 Cable- RAKAR Athens Hewlett-Packard Italiana S.pA. Paiazzo Italia Telex: 61514 NETHERLANDS Hewlett-Packaré Benelux, NV. 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HEWPACKIT Milan Tel: (022) 41 54 00 Berliner Strasse 117 Telex: 32046 : Hi Geneva 6 Nieder-Eschbach/ Se Telex: 2.24.86 Tel: (0611) SO 10 64 Cable: HEWPACKSA Frankfurt Telex- 41 32 49 AFRICA, ASIA, AUSTRALIA ANGOLA cYPRUS The Scientific Instrument Yokog2wa-Hemlett-Packard Ltd. PAKISTAN (WEST) TANZANIA Telectra Empresa Técnica Kypronics Co, Ltd. Okashi Building Mushko & rE nag Ltd. R. 3. Tilbery Lid. de Equipamentos Eléctricos 19-19D Hommer Avenve 17, Kamalinayan Society 59 Yoyogi 1-chrome Oosman Chambers P.O. Box 2754 SAR P.O. Box 752 P.O. Navajiman Tokyo Victoria Road aa 517/518 Rua de Barbosa Rodrigues Nicosia Ahmedabad 15 Tel: 370-2281/7 Karachi 3 42-1° Tel: 6282-75628 Cable: SICO, Ahmedabad Telex: 232-2024YHP Tel: 511027, 512527 . BEL! - YHPMARKET TOK 23-723 - COOPERS’ ba Tel: |. 28803, 68206, 58195 an Oar Cable: HE-I-NAMI The Scientific instrument Co. Lt. Cable KET TOK 23-7 Cable: Ci TOR Karac! 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Box 1103 Mechanical and Combustion P.O. Box 297 Diatah Merdeka 23 O2e Kyung Bide Engineering Company Ltd. UGANDA Hewlett-Packard Australia 1511, Prince's Building cual “Sch 9, Jalan Kilang R. J. Tilbury Ltd iP 10, Chater Road Tel- 4915 51560 Chongro Ka . ; 0, Bea aie 61 Alexander Street Heng Keng best wa Sena ss Tel: 642361-3 Suite 517/518 Crews Nest 2065 Tel: x! ‘ Cable: MECOMB Singapore Hotel Ambassadeur 290168, 232735 Telex: 809 Tel: 75-5841 (4 lines New South Wales Cable- SCHMIDTCO Hong Kong Cable. AMTRACO Seoul Nairebi Tel: 43.7856 man = SOUTH AFRICA Tel: 25670, 26803, 68206, 58196 Cable: HEWPARD Sydney INDIA Telecom, Lid. LEBANON Hewlett Packard South Africa Cable: ARJAYTEE Nasrobi Telex: 21561 The Scientific Instrument P.O. Box 1812 Constantin E. Macridis _(Pty.), Ltd. |ETNAM Co... Ltd. 280 Kh. Saba Shomali Clemenceau Street Hilt House VIE! z Hewlett-Packard Austrailia 7 O PO. Box 7213 43 Somerset Ré. Peninsular Trading Inc. Pty. Lid 6, Tej Bahadur Sapru Road Teheran P.O. H- 4 Allakabad 1 Beiret Cape Town 0. Box H-3 $7 Churchill Road Tet: 43850, 48111 3 216 Hien-Vuong Prospect 5082 a acon Cable: BASCOM Teheran Tek: 220085 ee South Australia Cable: SICO Allahbad Cable: ELECTRONUCLEAR Beirut — a K Cape Town Ter 20.985 Tel: 65.2366 The Scientific Instrument ISRAEL MALAYSIA F = Cable: PENINSULA Saigon Cable: REWPARD Adelaide Co. Ltd Electronics & Engineering MECOMS Malaysia Ltd. Hewlett Packard South Africa 12/5 Dickenson Road Div. of Motocola Israel Ltd- 2 Lorong 13/54 ), Lid. ZAMBIA Hewlett Packard Australia Bangalere -1 17 Aminadaw Street Section 13 P.O. Box 31716 R. J. Tilbury (Zambia) Ltd. Pty. Ltd. Cable- SICO Bangalore Tel-Aviv Petaling Jaya, Sel 30 De Beer Street P.O. Box 2792 2nd Floor, Suite 13 The Scientific Instrument Tek: 36941 (3 fines) Cable: MECOMB Kual2 Lempsr © Sraamfontein, Lusaka : Casablanca Buildings Lid. Cable: BASTEL Tel-Aniv = Tel: 724-4172 724-4195 Zambia, Central Africa 195 Adelaide Terrace 240, De. Dadabhai Nacroji Road Telex: Bastel Tv 033-569 MOZAMBIQUE Telex: 0226 JH Perth, WA 6000 Bombay 1 nye Cable: HEWPACK Johannesburg = FOR AREAS NOT LISTED, Tel: 21-3330 Tel- 25-2542 JAPAN PO.Box107 CONTACT: Cable: SICO Bombay Yokogawa-Hewlett-Packard ite. P-O- TAIWAN REP. OF CHINA ioictt packard CEYLON ee Nisei Ibaragi Bldg. Leureace Marques Hwa Sheng Electronic Co., Ltd. INTERCONTINENTAL United Electricals Ltd. eo rig Instrument 2-2-8 Kasuga Cabie- NEGON P_O. Box 1558 3200 Hillview Ave. P.O. Box 681 -» Lid. Ibaragi-Shi Room 404 iforni Staples Street Calcutta 1 Tet. 23-1641 No. 96 Churg Stan TWH. $10-373.1257 Colombe 2 Tel: 23-4129 ot eee rattith Read, Sec. 2 A» any Tel: 5496 Cable: SICO Calcutta Yokogawa Hewtett-Packaré Utd. F-0. Box 9443 woes crane ate Ao Cable- HOTPOINT Colombo The Scientific Instrument Ito Beiiding Let Tok SSST) CLE SIRSSS Co., Ltd No. 59, Ketoci-cho iis ereraCX Vickdagion 9836, 546076, 548651 30, Mount Road Nakamura-ku, Nagoya City = eo Cable: VICTRONIX Taipei 2 Tel: 551-0215 PAKISTAN (EAST) Tel: 86339 Mushko & Company, Ltd. Cable: SICO Madras Zirat Chambers 31, Jinnah Averwe Dacca Tet 280058 Cable: NEWDEAL Dacca —— —— — teeta a SERVICE MANUAL 9125A CALCULATOR PLOTTER SERIAL PREFIX: 1002 This service manual applies to HP Model 9125A Calculator Plotters having serial prefix 1002 or below. Copyright HEWLETT-PACKARD 1970 16399 W. BERNARDO DRIVE, SAN DIEGO, CALIFORNIA 92127 09125-90008 Printed: APRIL 1970 HEWLETT + PACKARD { SALES AND SERVICE TABLE OF CONTENTS SALES & SERVICE OFFICES Section Page Section Page % 9 UNITED STATES ALABAMA CONNECTICUT INDIANA 2812 South Brentwood Blvd. 5858 East Molloy Road TEXAS i STTRODUCTION: 22 «2s x sew cncee's 1-1 3-34. _X-Axis Mylar Drive Belt 2002 Byrd Spring Road SIN. East Wartord OE108 inesanapelis 2205" Tei ale) se2-so00 Tel 1S) 456-2685 20t € keapaho Re 1-1, Introduetion.. -..-....- +--+ 1-1 Tension Check. ...--+ +++. -3-8 —— 6. 2S Se ae 1-3. Model-Manual Information ..- -. .1-1 3-35. X-Axis Mylar Belt TWA: 810-725-2204 Spo kent NEW JERSEY NORTH CAROLINA aus Snare te LOUISIANA W. 120 Century Road P.O. Box 5188 : 1-5. Manual Change .....-...--.-- 1-1 Replacement .... 2.055 66 0s 6 = 3-8 a ye P.O. Box 855 Rickeds Ore 1923 North Main Street pons 1-7. Manual Content ...........- 1-1 3-36. X-Axis Drive Train Bearing Scottsdale 85251 TWX: 710-468-3750 ——e = on pg Tel: (713) 781-000 Replacement........ 222. 3-9 Tw 910-950.1282 DELAWARE LE hn iets aaateaened TW: 510-926-1516 meen Ii THEORY OF OPERATION .........--- 2-1 3-37. Mechanical Adjustments ....... 3-10 5737 East Srostway a nrag aaamrraadeo pepe ao nn ll a San Antonie 78225 $3. <Selrodection: = con. ee ew cee 2-1 3-38. | Y-Axis Pen Carriage ; Tel, 602) 2982313 Tel: (02) 6556161 6707 wasestene Read Twi 710-852-2945 Gieian £2105 wx. 310.871.1170 29! Theory: -i27s ss apess aiapetans ans-e~wrots 2-1 Adjustment’ ...<...< <.<.- << 5s 3-10 ——— ea Tel. (01) $8¢5400 NEW MEXICO Twx. 810-427-3123 UTAH ; 2-5. Information Transfer -..-..-- 2-1 3-39. Y-Axis Backlash Adjustment . . 3-10 ae Fick ay —c 3460 Seu Dine Drive oie hae 2 6. Firat Phase ------ 7-2-0 77- 2-1 3-40. x Axis Track Bearing a . Falterton $2531 sees NE. 2nd Aree 2 Cake Chey aad imeweree Gigs Testa Beat we s10305 S681 econ ot ee a = Ci a - : el: (305) ~ (301) $48-5370 sey ; 2-8. Se ee a ae 2-1 3-41. X Gear Train Backlash tern ayant stat Tax sist 7m2 wo Tb eae eet ieee CANN estos nt Lee 2-10. Monit: Punee: << sax <enansc 2-4 Adjustment ..........-. 3-11 Tw s10-4992190 a ae MASSACHUSETTS Las Creces #2001 Oklahoma City 73112 Seuth Burfington 05201 3-42. Y-Axis Alignment ......... 3-11 1101 Embarcadero fot «EL Gommonwenth reset tage 213 Tw sipse3e550 Tw sioeseces2 Twi iossei2 II MAINTENANCE, PERFORMANCE 3-43. X-Axis Alignment ......... 3-12 Tee ets) a2 600 Tek (305) 881-387 Twa 7103266900 NEW YORK OREGON ica VIRGINIA CHECKS, AND ADJUSTMENTS ...-..-.--- 3-1 3-44. Performance Checks .........- 3-12 : : MICHIGAN Albany 12205 4475 SW. Scholls Fecry Rag —_F-0- Box 6514 = oe 3-1 3-47. Control Settings .......... 3-12 Sree acy” Magen sven LS ey Te oer rie Rhee 3-3. Preventive Maintenance ........ 3-1 3-48. Power Application ......... 3-12 Twix. 910-367-2082 St. Petersburg ee 1213 Camprillie Road SS TWX: 710-956-0157 3-5. Environmental Operation .....- 3-1 3-49. Functional Check.......... 3-12 1055 Shafter Street Twn. 10-853 0366 MEEESOTA Tex i607) 754-0050 $500 Moss Sede Sovievaré WASHINGTON 3-6. Cleaning ....-+.--+------> 3-1 3-50. ‘Install Paper........ re a. Fen (ie) 223103 GEORGIA 2459 University Avenoe — ——. Bellewse 58004 3-7. Potentiometer Cleaning ..... . 3-1 3-51. Initial Positioning ......... 3-12 TW: 910-395-2000 a ee Tei (612) 65-8061 Poupheepie 10 TWX: 710-737-3650 Tw. 910-443-2303 3-8. te ee 3-1 3-52. Origin Shift............-- 3-12 7955 East Prentice Te od) 42-681 Tx 510-248-0012 King of Prussia Indust Park Charleston MISSOURI 3-9. Visual Inspection ........-- 3-2 3-53. Carriage Adjustment Check. . . 3-12 ea gecee tien TWK: 810-766-4890 11131 Colorado Ave. 39 Saginaw Drive Kieg of Pressia 19408 Tel- (304) 768-1232 3-10. Performance Tests -.......--- 3-2 3-54. Interface and Control Circuits . 3-12 Twi Si0s35-0705 HLINOES eet morgane Sag Twi sit-s60.2570 FOR U.S. AREAS NOT 3-12. Test Equipment......... <5 SED 3-55. Power Supply Adjustments .. . 3-12 Shani £0075 TWX: $10-771-2087 TWX: 510-253-5981 RHODE ISLAND Say ee 4 = . pe hairp tN PA 5 a ee “e 3-56. oldest se Supply oe Tw 3102233603, ton, ng land 5 Ean revdence G8 Ror ttyond Cato echanical Maintenance ........- - URINIOTIES. 5c sac 3 0s Pere A | pees bag cans, Be eee ee 3-15. General Disassembly ......-- 3-3 3-57. Timer Adjustments ........ 3-13 -) ©] so 7 eee jag 3-16. Removal of Carriage Arm....-.- 3-4 3-58. Short Timer ..... Kinet elas 3-13 ~aavs Oy 3-17. Removal of Pen Carriage ....-. 3-4 3-59. Lene UMRCR: on 6 oe eS 3-13 3-18. Wiper Replacement (Y-Axis) . . . 3-4 3-60. DAC Alignment ...... ere i!) CANADA 3-19. Limit Switch Wiper Replace- 3-61. X DAC Alignment.......... 3-14 ALBERTA : BRITISH COLUMBIA MANITOBA NOVA SCOTIA ONTARIO QuEBEC = Ped Ue aa re = ; se ae nea Lee 7 9 seep ae aor e ? ae SF P a nt (Canada) Ud. iene Sosa Ls. Sewer Ltd. Simoes ms Kcanate Lee. essing tana Ltd. Phones oon (Canads) Ltd -20. iper Replacement (X-Axis) . - . 3- -63. ector Generation Alignment. . 3- } 2 oe - 5 i = 3-21. Potentiometer Replacement 3-64. Deadband Verification. ...... 3-14 Tex: siosst26st Twa. 610.922.5053 Tw S1es7 3531 Te (2) seasu Tw S10 562-1952 Tan 60-422 2002 (ME ANIG) en, oases eases en 3-5 3-65. Vector Alignment Preliminary . 3-16 q : mabigEeed (ed 1 3-22. X-Axis Slidewire/Limit Switch 3-66. Filter Matching....... aa os SedG pad ro ee — eee oes Pe oer i gan pene oaths eo eon mia) Lids i Ponte Cae, at -23. -Axis Restringing ..-..-.-.- - -68. Functional Test..........-.- - oa ss fi 3-25. Y-Axis Drive String Tension 3-69. Control Settings. .... a pJetecexd- SLO Gheckossas 6s os tee ie 3-6 3-70. Final Test ..... eats . - 3-16 3-26. Y-Axis Drive String Tension CENTRAL AND SOUTH AMERICA Adjustment .......----+-- 3-6 IV PARTS LIST....... lees on aneat 4-1 Wis wewtna —Slurcacpny cu tn. Sr emcee, Eemrene Sees a re = ai. Restringing Procedure ------ - 6 ach aeetrapactios Se ee es oe 4-1 Lavelle 1171-3 ane Post Ovtice Box 3193 27 Dusrchia hee. hive. Manvel Espinosa No. 1350 Aveasda tena 2577 3-28. X-Axis Restringing ..-..-...-- 3-7 4-3 Ordering Information ..........4-1 Buenos Aires Santiagn Quite Kingsten Bidg. Alina Casilla de Correo 370 = Tel: 35-0436, 35-0627, 35-0531 Jel. 42396 Tel: 12496 Tel $2657 Panama City Mortevides 3-31. Restringing Procedure --.---- 3-7 . Telex: 012-1003 cgi Cobceats: Sealiags Cable: HORVATH Quito Cable- GENSERY Tel: 30833 Tek 40-3102 ; 3-32. X-Axis Cable Tension Check - - - 3-8 V TROUBLESHOOTING ............ -» 5-1 —— a EL SALVADOR ae 3-33. X-Axis Cable Tension 5-1. Introduction ............ a 5 eek Rew acts o Basi —«MStmetacion | —_gartada Postal 1588 ec. meek Fermande es Hewlett-Packard De Adjustment. ......----.-- 3-8 5-3. Troubleshooting. ......... ee | ’ a ae eo 27 bweaida Norte 1133 meas 428 hreida Petit Thewars 4719 CA Sao Paule - 8, SP pad hereo 6287 Tel: 25-74-50 Mexico 12, D.F. Casilla 3061 Caracas Paar cemears —— Bogota, 1 DE. Cable: ELECTRONICA Tel: 5-73-46-43 bn Tel: 71.88.05, 71.88.63, 71.93.30 . — Tel: 45-78-06, 45-55-46 ee NICARAGUA Csbie. FEPERU Lima rm = tec Ua, = es Telex 048400 Slander Associates Latin America joariaco Postal 689 RICO a Avenida Franklin Roosevelt 84 Apartado Postal 1226 Edificio Teran San Juan Electronics, Inc. Hewlett-Packard ie te Janeiro, 70-39, 6B Ge Altreds os om sae Tel- 3451, 3452 fee a kan ol Saletan Tel: 2329733 Apartado 3243 Ter oss Cable. ROTERAN Managua Prag hagrag 2S ee etre as oie Cable: HEWPACK Rio de Janeiro San José Cable: OLALA Guatemala City Sam tan 00905 wert a a yt Tel: ($15) 326-7000 fs TWX: 910-373-1257 Cable: GALGUR San José cable SAIAIINCS Seo Jose Cable. HEWPACK Palo Alto Telex: SATRON 3450 332 Telex: 034-8451 LIST OF ILLUSTRATIONS Figure Title Page Figure Title Page 1-1 Model 9125A Calculator Plotter ....... 1-0 3-17. Y-Axis Gear Train Backlash 1-2 Instrument Identification............ 1-1 Adjustment = 5-25 teers ss ce 3-11 2-1 opie: Flow: Dae 6am 2.29. . <c6ic ota « 2 oe 2-2 3-18. X-Axis Track Bearing 2-25 _- Blocks Dinpram =o tesco ew lagerdiersieie-o< ws 2-3 Adjustmentacs ova sere gases, oso 5 3-11 3-1. Slidewire Cleaning................ 3-2 3-19. X-Axis Gear Train Backlash 3-2 Slidewire Lubrication.............. 3-2 RYU Teo ee, eo 5 eee 3-12 3-3 DET C21 he es le oe 3-3 3-20. Preliminary Functional Check 3-4. Y Slidewire Cover Removal.......... 3-3 Ligh te ys. eae eae re Oe 3-13 3-5. Autogrip Lead Removal............. 3-4 3-21. Functional Check Graph Program A ... 3-14 3-6a. Carriage Arm Removal (Upper) ....... 3-5 3-22. Card Location Guide..............- 3-15 3-6b. Carriage Arm Removal (Lower)....... 3-5 3=29-— Axio Amplif er (Ck: ORV) s.5. < oes. ss os: 3-15 S=7. - WipersProtectiants.oaresetctarss co 5h oo es 3-5 BE eed ote dd ee a 3-16 3-8. Slidewire Lead Connections.......... 3-6 py eee LCE US i re 3-17 3-9. Y-Axis Drive String Tension Check - 3-6 Saabs! - WECUM LIP TIVICEN Safco) sis <5 «landig ec 0s 3-17 3-10. XKand Y Axes Restringing ........... 3-7 plore Pmt Bod Oa one nee ee 3-18 3-11. X-Axis Cable Tightening............ 3-8 3-28. Functional Test ProgramB......... 3-19 3-12. X-Axis Cable Tension Check ......... 3-8 3-29. Functional Test Graph ProgramB ... . 3-20 3-13. X-Axis Belt Tension Check .......... 3-8 4-1. X-Axis Drive Assembly ............ 4-3 3-14. X-Axis Drive Train Bearing Locations . . 3-9 4-2. Pen Arm Assembly. ..............- aos 3-15. Y-Axis Motor Clamp Screw......... 3-10 5-1. Printed Circuit Board Locations ...... 5-1 3-16. Pen Carriage Adjustment .......... 3-10 5-2. Troubleshooting Chart ............. 5-2 LIST OF TABLES Number Title Page Number Title Page 3-1. Recommended Test 3-3. Slidewire Reference Supply Adjustment. 3-14 Drs 1 ee eae Ss Oe ea aa 3-2 3-4. SIA MP MIMENE Sc .. 20 1¢-0. 0 wicsn.cusve se 3-14 3-2. Power Supply Adjustments......... 3-13 4-1. arte Wal sbe ee coe cagaheus Sate cr oqareuede 4-2 ayIM3a0INS BONVHO ON A YO X a9V dau (183. Waldv LNSWSAOW NOILISOd IWNIDINO Nad ON OL NYNL394) Yall dv A ONV X 3SMaAaY 43lddWV A YO X 30V1d3y 43 4Id WV SMO1104 $"104.LNOD WVY9ONd NISIWO DILSONOVIA A ONY X JAOW (MO NOON N3d) NnY ISNOdSau A/X ON b¢ aNVvoa JONVHO ON 39V1d3y §,9Vv0 aSuaAay LNSWSAOW Nad OvVd AYOX aov1day dvd SMO110d ‘ . ’ y all TROUBLESHOOTING CHART (Sheet 4 of 4) FIGURE 5-2. MODEL 9125A CALCULATOR PLOTTER FIGURE 1-1. 5-5 1-0 REPLACE BOARD 4 OK RUN DIAGNOSTIC PROGRAM RUN DIAGNOSTIC PROGRAM o rq uy> we 520 o wo ais 2=ax< _ aw wer ws 200 =a aS 3 = w Ow <5 Ja a< wo = a Py «85 Se> 3 oZze <5 3 se eas S632 Pe) ao ca °o 2 ec ° oo Er a e> =u < ace = | <se oa wi = oc 22D Ps wot zod w = =au 2 5.8 <— a 2 ° =o a ae 5 cs os= Oo ww =< 250 1 ° 5 wu ne <a S ars S$ ja oa<ro a< Fas wo <S eo ox wu =o a 5 = o o = a o z « 5 s1)be 1 2 2L} 233 [Je x = o rr = a w ud z 2 5 =< a o zo a a w = o = ate w = wo « a tS ° a os 2 n= wd S £2 w 22 = zo a of Za 3 ge a oso 20 5-4 FIGURE 5-2. TROUBLESHOOTING CHART (Sheet 3 of 4) SECTION | INTRODUCTION 1-1. INTRODUCTION 1-2. The Model 9125A Calculator Plotter (see Fig- ure 1-1) is an X-Y plotter intended for use only with the HP Model 9100A or 9100B Calculator. All plotter operation in this manual refers to the combination of the calculator and plotter. 1-3. MODEL - MANUAL INFORMATION. 1-4. This manual is applicable to the Model 9125A with a serial prefix of 1002 or lower. Earlier instru- ments have a serial prefix that is the first three digits of a two-part eight digit serial number (000-00000) used to identify the instrument. More recent instru- ments have a serial prefix that is the first four digits of a two-part nine digit serial number (0000A00000) used to identify each HP instrument (see Figure 1-2). The letter separating the prefix from the suffix iden- tifies the country of origin. 1-5. MANUAL CHANGE. 1-6. Should any change in this manual be necessary, a new serial prefix will be assigned to the changed model and a change sheet will be supplied defining the difference between the changed model and the one described within this manual. Other corrections, due to any errors that existed when this manual was printed, will be provided. These changes are called Errata and will appear only on the change sheet (Manual Change). For additional information pertain- ing to this manual, or other HP instruments, contact the nearest Hewlett-Packard Sales/Service Office listed in the back of this manual. 1-7. MANUAL CONTENT. 1-8. This manual contains sections covering theory of operation, maintenance, and troubleshooting. Suf- ficient information is provided so that all required mechanical maintenance and troubleshooting can be performed. Electrical maintenance and troubleshoot- ing, however, is covered only on a circuit board or module level. 0000 A 00000 PREFIX SUFFIX COUNTRY OF ORIGIN FIGURE 1-2. INSTRUMENT IDENTIFICATION @ ouvon Dvidde ova uO 'g'b 'e ‘2 SOuvOR JOVIdaN OlASONOVIO NMO"d O1LGONOVIG NOW aM Nowa ONY wOV"d au ddO NUMA AMOHS nevo WO NadO vovlday ALINNILNOD w1av9 BOVITOA ON aena 440 BNOILOBNNODWAANI woaHO woaHo ANAWAAOH AL INd | volving wo 7} Aan NOLLVLIOXS AVIS yOUHD 9000 ALL ove aovdae || HINGOW ATdsNs | ove WOUW AVIIe Oo WAMOd BOVIdI ] MOHD "INaGaud rtd AOONVIG HOVLIOA 440 834 dane | aE | AGi= WOOHD 0 tA © Andano 300 x iote ‘Wend ct) S}0ULNOD WvuoOMd NIOIWO OILBOND VIO FINGOW Addn ava AQNVX JAOW aSNOdSaM Nn J WIMOd BOWIdIe ON ON Add a oy 6A AGi= WOMND NO aov day ic ] LAO» ANdLno ova 8200 401s Wend 0 ova wo 'o ‘ee ‘af HNOOW ATddNs ave souvod JOVda4 ON waMod BovIday a | dans $3 AGl= ¥OIMO INAWaAOW | Nid 4A0 * Andino } ‘Ova 8300 dOL8 HENd 40 ova uo 'G ‘w ‘e ‘2 | SOuVvoe 7OVIdau ON TROUBLESHOOTING CHART (Sheet 2 of 4) FIGURE 5-2. 5-3 5-2 = = ae “2 g= a< a2 =° s = «< = = = = = R= = i] Sz Ss of 2 s= 2 <= s o < <== a 7< cu s =P aca a a> Pa — a> - uz = =. = =< so = Ss ~ 2 = 3 |B ler 3 aif 3s Ii. re] z= ° ° 5 = = “ey 4 cs rw = =o “> a = = 2: ws = $ = = co oe co & Ez. = | S*eL5 3] 33 EzSe we = ig 5&a-4 S30 = zo2°= 25 35 | a a 3] 222 3. BEoss Z> zs aS “| 255 za =osuy sft S= Se>50 s°s = 3 388 s oll = st 4 «ie 3 3 = x “ 4 2 aS g = = i = <= Fa Ea 5 5 ae 3] se. |& o7 = Eo s s ° =—2 =3 13 < =x Sea g> = te woe 2 =+ ° <= = -< = 2 = 2 =s sg 2] s< Sz S25 3 = Ts BESS s5s 5s Ss “= zu< oz a S cu = = 5 ad <= i 4 So Sa S| | 33 = +9228 Zber * os =2" = ess oSaae 2 3332 r=} S =x = 2 grew 4 ° 8S= -e zZuon~n e~za 238 2333, #583 «2<¢ >S5ru -*>s5 Py “ovs= oa a= eco = = z s s = Se = e< = = Si =8 < oo Fo cz eo = 23 =< 2s 2 = <2 E5 oOo s= =2 aS “4 282 596 =32 — FIGURE 5-2. TROUBLESHOOTING CHART (Sheet 1 of 4) SECTION Il THEORY OF OPERATION 2-1. INTRODUCTION 2-2. This section deals primarily with Calculator- Plotter interface logic flow. It covers basic operation of the plotter on the functional block level. A theory of operation at the component level is not included. 2-3. THEORY 2-4. GENERAL. The 9125A Calculator Plotter operates by interpreting the coordinate values stored in the X and Y registers of the 9100A/B Calculator. Information is transferred from the X and Y display registers only while the calculator is in the display routine. Refer to Figure 2-1, Logic Flow Diagram and to Figure 2-2, Block Diagram. 2-5. INFORMATION TRANSFER. Information trans- fer from the calculator to the plotter is divided into four primary logical phases. The initial phase con- sists of detecting and decoding the proper operation code. This code is the # or y operation. The FMT initiates the display routine. The FMT code and the # or J code defines the plotting mode. The second phase determines the plotter and pen status. A de- termination is made in this phase as to whether the plotter is through plotting the last point and whether the pen is on or off the paper. The third phase con- sists of simply collecting the coordinate data and transferring the data to the appropriate digits in the digital to analog converter (DAC). The fourth and final phase initiates the actual plot of the new co- ordinate, sets the appropriate timers to allow suf- ficient time to actuate the pen if necessary, and is- sues a continue code to the calculator. The continue code starts the calculation of the next point while the previous point is being plotted. The four-phase cycle is then repeated. 2-6. FIRST PHASE. The first phase of the infor- mation transfer is initiated by an IOPF output from the calculator (see Figure 2-1). This indicates an operation code will follow (from keyboard if F41 is false, from program if F41 is true). FF 25 remem- bers whether the operation is from the keyboard or the program. The operation was a FMT if HFMT is issued coincident with IOPF. HFMT sets FF 20 which enables the FMT gate to decode the code lines, F20-F25, coincident with the next ITBB from the calculator. FF 20 is cleared and the sequence starts over if the code is not an ory. If the code is an# ory ; FF 21 is set which forces the calculator into a fixed point display, and triggers FFPDL when the plotter is ready for the next data point. FFPDL isa 40 ms pen delay. Additionally, a ¥ code sets FF 70, a # code clears FF 70, determining whether the plot will be made with the pen up or down. When the clock (data strobe, a stretched version of ITBB) goes false, FF 20 is cleared to disable the FMT gate until the next FMT operation occurs. 2-7. SECOND PHASE. When ETS (0.9 s timer) and ETL (1 s timer) are true, indicating the plotter is ready to transfer data, along with FF 21, FFPDL (40 ms pen delay) is triggered. FFPDL allows the pen drop mechanism to actuate before any data is transferred. It is actuated for every data transfer, whether the pen is up or down, but adds negligibly to the total plot time. FF 90 indicates, when true, the pen was up when a previous FMT was encountered. When ETL goes true, FF 80 (direct pen status con- trol) is set and the pen drops. If FF 90 is false and a FMT vis encountered (FF 70 is set) it means the pen is down and the plotter is ready to transfer data as soon as the hold-off timers are all true. A FMT (FF 70 cleared) clears FF 80 and lifts the pen when the hold-off timers are all true. 2-8. THIRD PHASE. The start of the third or co- ordinate data collection phase is signaled by the 60 Hz sync state of the calculator display routine. F40 and F41 indicate the state of the display when the cal- culator is in display mode, as shown by the chart on the flow diagram (Figure 2-1). FF 22 is set when sync is reached and the hold-off timers are cleared. FF 22 activates the DAC hold circuits and the old co- ordinate is retained. The decimal digits are trans- ferred into the DAC least significant bit first, starting with the X register into the X axis and ending with the Y register into the Y axis of the plotter. FF 22 also activates the various digit decoding gates to determine which character is currently being transferred (pres- ent on code lines). When the state of F41 changes, it indicates the start of a new display register. The digit counter, a counter which counts ITBB's when F22 is set, is reset so that it can keep track of the number of decimal digits being transferred and fix 2-1 DUVMONVH NI LGIXa WOIHM Gaivo HaIIWNO BILONIQ | “oh x | anus ‘SRION HOG aovoza ole tty mp aavoaa 02 betty aovoz0 «019 O00 aovoza §=—,ol0( stett DOOD ‘BAUR ANIOd B0v0I0 O16 FFT TTG| awwioad Mod Ld99x3 atrité (0u9Z OBINV) gavo30 l= Ht 1g MOON ol Tlo UE novora 012 (FOL 18) HAV-ARG si aan aavo20 ool (}° 4 ° 5 Lasa0 oo (8,904! 4NNOD) BONINOAS WILNNOD 4I010 || alata i mC waisioay Al O | waisioy x! 0 [0 et 1 ' LSWha [Oba Iba NILNOW AVIdB8I0 $aNIT AaX_NO 3009 3NNINOD aivwango ( (EY) 12 AMLND v LNIOd ‘930 WALaV HO WNOMAG GUALOVEWHO 2 (Q9NVIT9INd) Saivo Ssauddv NOLLONMYLGNI L910 WWID90 BNOLS ova NI Lie NOIS 138 ovd OL wBLANNOD L910 ANSWIYONI SVM ( ) ANd dt 1490619 1v NMOO Nad ifd OL YWIOWIWIY df Si Nid a) 9UaH OFivNLoV wIWIL O98 | Bi Wiad (@v) MANIA 998 BO GI Gidd (@v) ‘GMVOBAIN LNO GN907 OSV <3NNILNOD DWISGOd Od DIGWO? 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O@4ex9019 | AVd610 LNIOd G9Xid GIOMOd led GuVOBAIN LNO $901 Geselza (NOLLONWLSNI LXBN 4O 3009 40) GBLI NOILONWLENI LXIN BNL 900930 SUBIAITWNO ONIMOTI04 AHL SIivo O&se(HOC719) LWa SYM NOlwMado | TWH ) « (@v) ate Aay §ea490 SVM NOLLVWadO NOlLWadO ANY AG G9UVIID HO 138 Gedd = FLON Geass d318 WvdbOdd Vv SYM NOlLWNadO NOILONULENI NOllvwadO ANV HO LWA PRINTED CIRCUIT BOARD LOCATIONS FIGURE 5-1. LOGIC FLOW DIAGRAM FIGURE 2-1. 5-1 2-2 (QaHSNd AH dOL8 SBLV9IONI) “> dlSi i NOS WVYOONd S3LVOKINI) (NOLLW3dO MIN S3LVOIONI) DUIMZOINS AlddNs BuIMI0I18 UILNINd OL > 4d01 (NOLIWH3dO LW4 S3.LV9I0NI) Werguand 4018 MddNG Y3MOd NO. , AULINDMID N3d OL 4H -| wOWiL | po-| 000 40 } | ee | ‘ nt tea'Obd OV74 AULND auivno Aax | _NOXA NOWA ‘S24N=O2NNt anhenos -* se OV"ld ALN’ | GeyN a QuvND AIX | -O2N 7. Cat HNIA HNIA SdA<# . OuINOD | AVAGIO LNIOd Oaxid SaowOs | THA SLNdNI WV") LYNN ‘ , YyOLV INO Wd VLVO H9dOUdWI are MO74NIAO \e4'Ovd 9079 + L4WH SNOlLVeadO Nv SUaeWnN ce 3, 83999 1N ano) OLS Ies'Ova cas hg a dWY IMOd X on 2 A“ Lie | y [emjwo]e[ ame. x] Ita oe ‘Ovd Ly 4OLOW OAUAS A P| dWY W9MOd A / Ni < } }a710H] wos f—f ova, A “tip a. A A A 4 Iea'Oval x20 Ips ‘Oba MOTWIAO =—-H19019 ——EEE (4d01 SUBWWVEOOUd ONY AV1dS10 NI waLgiooy ANaMND) ee, a3! 48 3009 LNdLNO) $LNdLNO YyOLV TINS FIGURE 2-2. BLOCK DIAGRAM 2-3 the relative position of the serial digits in the appro- priate decade of the DAC. 2-9. There are a pair of ITBB's for each character (including blanked zeros) except the decimal point for which the ITBB occurs only once. The first ITBB after F22 is set, increments the digit counter and places the first decimal digit in the 10° decade of the X DAC. The second ITBB merely increments the digit counter. Subsequent decimal digits are simi- larly stored and the digit counter is incremented for each ITBB. If a decimal point is encountered, the digit counter is reset along with the DAC currently being loaded. Only the digits to the left of the deci- mal point are of any interest and will remain loaded in the DAC. When a negative sign is encountered, it means the last digit was stored and the appropriate sign flip-flop is set (FFXS when F41 is false, and FFYS, when F41 is true). This reverses the analog input to the servo channel. If the digit counter reaches the state 1110, seven characters were encountered before or after the decimal point. This indicates an illegal data format. FF 50 is set and lights the Im- proper Data indicator; FF 70 is cleared so the pen will lift to keep the improper data from appearing on the graph. The beginning of a new register is indica- ted by the change of state of F41 at which time the digit counter is reset and the whole process starts again. When E40 goes false (F40 goes true), it in- dicates the start of the Z register. This means the X and Y coordinates are stored and the final, or plot, phase can begin. 2-10. FOURTH PHASE. As E40 goes false, it clears FF 21 and FF 22. The calculator is released from the mandatory fixed point display and the DAC’s with the new coordinate are reconnected by the hold switches to the servo channel. FF 22 sets FF 24 which allows for a possible continue command to the calculator. FFTS is triggered and will hold off a new data point for at least 0.9 s while the most recent coordinate is being plotted. 2-11. If E80 is true (F80 is false or cleared), the pen is up and the one second timer (ETL) is enabled. When F21 clears and if F70 is true, FF 90 is set, which causes the pen to drop when the timers go true. If the FMT command was issued from the program when FF 24 is true, a continue command is issued. The FMT command is indicated by FF 25. The cal- culator now calculates the next point while the plotter moves to the coordinate just transferred. The four- phase cycle is then repeated. Ref. Designation Part No. Description Quantity 1 5080-7979 Pen - Disposable, red (pkg. of 3) As Req'd 5080-7980 Pen - Disposable, blue (pkg. of 3) As Req'd 5080-7981 Pen - Disposable, green (pkg. of 3) As Req'd 5080-7994 Pen - Disposable, black (pkg. of 3) As Req'd 2 5060-6427 Holder, Pen 1 3 0520-0163 Screw - Mach, ss, 2-56 x .188 FH POZI D S es 07035-60860 Wheel Assembly, Pen Carriage + 5 3030-0142 Screw - Set, 2-56 x .125, Allen 2 6 0570-0190 Screw - Mach. ss, 0-80 x .125 Fill H PD 1 7 09125-80590 Carriage Block and Wiper Assembly 1 8 09125-80440 Cable Assembly, Pen Carriage 1 9 09125-60110 Wiper Soy ee 4 (¥ axis Limit Switch) 1 10 0590-0149 Nut - Hex, 0-8 1 11 07035-20240 Stud, Return Pulley 1 12 07035-20200 Pulley, Return i 13 1410-0269 Ball Bearing 3 14 3050-0394 Washer - No. 4, Flat 2 15 09125-40060 Block Assembly, Pen Arm 1 16 07005-60260 Bracket Assembly - Slider 1 17 07035-20350 Screw, Shouldered 2 18 07035-00230 Mount - Rear, Scale 1 19 5060-6538 Pen Lift Assembly Z 20 1460-1201 Spring, Pen Lift 1 21 09125-60260 Slidewire Cover As Req'd 22 2200-0145 Screw - Mach. ss, 4-40 x 7/16, PH POZID 1 23 2190-0108 Washer - Lock, No. 4 4 24 2220-0009 Screw, Mach, 4-40 x 5/16, Fill, SSTL 1 25 07035-22180 Pulley, Drive 1 26 07005-20410 Stop, Pen Carriage 1 27 09125-80160 Pen Arm Assembly 1 28 1460-0296 Retaining Ring 1 29 07035-20330 Block, Arm Mounting 1 30 2190-0125 Shim - ss, 0.093 ID, 0.156 OD, 0.012 THK As Req'd 31 07004-60070 Pen Drive Assembly 1 32 0510-0810 Retaining Ring 1 33 09125-60030 Solenoid Assembly 1 34 2270-0022 Screw - Mach. ss, 4-40 x .188, PH PD 1 35 1400-0304 Holder, Solenoid Assembly rf 36 07005-00730 Pointer, Index 1 37 09125-60350 Plunger Assembly, Solenoid 1 38 5060-4569 Bracket Assembly - Coil and Wiper i 39 09125-80170 Wiper Assembly, X axis 1 40 2200-0164 Screw - Mach. ss, 4-40 x 3/16 FH PD 5 41 09125-60270 Motor Block Assembly 1 42 3030-0208 Screw - Set, 4-40 x .125, Allen = 43 0510-0724 Retaining Ring 1 ae 2200-0139 Screw - Mach. ss, 4-40 x .25 PH POZID 1 45 3050-0394 Washer - Flat, .130 ID, .25 OD, .02 THK 1 46 07004-60060 Gear Assembly, Pen Drive 1 47 2200-0145 Screw - Mach. ss, 4-40 x . 438, PH POZI D 1 48 2200-0710 Screw - Mach. ss, 4-40 x .375, TH SD 1 49 5020-4225 Yoke, Cable 1 50 2190-0094 Washer - Lock, No. 2 2 51 0520-0066 Screw - Mach. ss, 2-56 x .188 PH PD re 52 0360-0243 Terminal Lug 1 53 0570-1103 Screw, Shoulder 5 54 1410-0941 Ball Bearing 5 55 3050-0367 Washer - Flat, .105 ID, 1/4 OD, 1/64 THK 5 56 0360-0357 Stud, Terminal 2 57 07035-00760 Bumper 2 58 07035-22440 Insulator, Mylar 1 59 09125-40030 Cleat, Motor 1 60 2260-0007 Nut, 4-40 1 61 5080-7966 Servo Motor 1 62 09125-20210 Rod, Track 2 in. 63 07004-00350 Clamp, Trailing Cable 1 64 2200-0048 Screw - Mach. ss, 4-40 x .375 PH PD i 65 09125-60280 Bearing Adjustment Assembly 1 66 09125-80230 X axis Slidewire and Limit Switch Assembly 1 67 09125-20070 Bumper 3 68 2360-0209 Screw - Mach. 6-32 x 1.00, SST, Pan, POZI 2 69 09125-60040 Pen, Solenoid, Complete 1 FIGURE 4-2. PEN ARM ASSEMBLY (Sheet 2 of 2) 4-5 4-4 FIGURE 4-2. PEN ARM ASSEMBLY (Sheet 1 of 2) SECTION Ill MAINTENANCE, PERFORMANCE CHECKS, AND ADJUSTMENTS 3-1. INTRODUCTION 3-2. This section provides information for mainte- nance, performance testing, functional checks, and adjustment of the 9125A Calculator Plotter. Mainte- nance procedures, tests and adjustments will ensure that the instrument conforms to specifications. Func- tional checks maintain the instrument in an opera- tional condition. If the instrument fails to meet spec- ifications, or is inoperable, refer to Section V, Troubleshooting. 3-3. PREVENTIVE MAINTENANCE 3-4. GENERAL. The Model 9125A Calculator Plot- ter must be maintained properly to obtain accurate, trouble-free operation. This requires periodic lubri- cation, performance checks, and visual and electrical checks. In accordance with good maintenance pro- cedures for all precision measuring instruments, Hewlett-Packard recorders should be protected from dust. Use furnished dust cover P/N 4040-0477, when not in use. 3-5. ENVIRONMENTAL OPERATION. This instru- ment is designed to operate over an ambient temper- ature range of 0°C to 55°C. Operation under other conditions will produce inaccurate results and may cause damage to the plotter. In areas with high hu- midity, graph paper may become distorted, affecting the accuracy of the grid lines. The area of operation should also be as free as possible of air contamina- tion (soot, smoke, fumes, etc.). Excessive air con- tamination will require more frequent cleaning. 3-6. CLEANING. Thorough cleaning should be per- formed periodically. Intervals are determined by type of operation, local air contamination, and cli- matic conditions. Generally, under normal use and conditions, cleaning intervals should be nine to twelve months. Cleaning routine should include the following: a. Remove platen and raise hinged top casting (see paragraph 3-15. b. In inaccessible areas and where there is only dust accumulation, cleaning can be accomplished with an air gun. In more accessible areas and where air gun will not remove dirt, dust, or ink, accumula- tions should be removed with a sponge or cloth satura- ted in plain soap and warm water, then wiped dry. c. Every eighteen to twenty-four months, gears should be cleaned thoroughly with a solvent and re- lubricated. Do not use soap or water on these com- ponents. d. Platen should be cleaned with plain soap and warm water. Do not use solvents or silicone-based cleaners of any type on the Autogrip platen. e. Clean slidewires. See paragraph 3-7. 3-7. POTENTIOMETER CLEANING. Irregular or "jumpy" plots produced on a properly adjusted recorder may indicate worn or dirty balance potentiometers or wipers. To clean the potentiometers, spray the poten- tiometer and limit switch along their entire length with Slidewire Cleaner (Part No. 5080-3605). Rapidly move the carriage arm or pen carriage several full scale excursions. Spray the wipers directly with Slidewire Cleaner. Thoroughly saturate a Kimwipe (Kimberly- Clark Type 900-S) or a cotton swab with Slidewire Cleaner. Rub the potentiometer (wire mandrel and return strip) and limit switch along their entire length, using the moistened tissue or swab (see Figure 3-1). Note any discoloration of the tissue or swab after rub- bing. Repeat the cleaning procedure until there is no stain, then clean once more to ensure that all c