HP 7414A Operating And Service Manual

Text of HP 7414A User Guide:

• 2510-0121 SCR EW 2580-0006 NUT A 10MP39 MOTOR ~AD NOTE THAT MOTOR MUST BE INSULATED FROM MP14 CHASSIS 0570-1009 SCREW 2190-0763 WASHER 2360-0121 SCR EW A10A1 GEARBOX SUBASSEMBLY 01250-21101 SPACING WASHER ~~~~~~ __ 3030-0441 SETSCREW MP18

• HP 7414A, Section V Maintenance h. Arrange each part in order on a wooden dowel for proper position during reassembly on the shaft during lubri- cation. 5-52. GEARBOX LUBRICATION. After all gears are arranged on the dowel, lubricate as follows: a. Oil each gear bearing with Mystery Oil (Table 5-2) to soften gum residues. b. Grease each primary clutch and gear assembly as shown in Figure 5-21, using the following steps to grease each assembly: (1) Work grease into coils of each spring, and install on one half of clutch hub. Note that spring key must be in proper position (Figure 5-21). (2) Slip plastic clutch sleeve (with ratchet teeth) over spring; mate sleeve cuto

• HP 7414A, I I I I I I I I I I I I I 1 ) 07414·1 HEWLETT ~ PACKARD MODEL 7414A THERMAL-TIP RECORDER SERIALS PREFIXED: 1145A This manual applies directly to HP Model 7414A Thermal Tip Recorders having serial numbers pre- fIxed 1145A. OTHER PREFIXES: For instruments having prefixes lower than 1145A, refer to Appendix I, Backdating Supplement. For higher prefixes, see the manual change sheets pro- vided. OPERATING AND SERVICE MANUAL 0741 4-91999 Copright 1972 Hewlett-Packard Medical Electronics Division 175 Wyman

• HP 7414A, Section V Maintenance positive and negative directions. The trace line over the width of each channel should be ± 0.25 mm; if not, see Paragraph 5-33 to adjust stylus parallax. The time reference with respect to paper (full chart width or four channels) should be within ± 0.25 mm. If not, refer to Paragraph 5-34 for the channel time synchronization procedure, which is used to adjust galvanometer parallax. e. Signal Styli: Inspect each signal stylus for cleanliness and condition. If a stylus is bent or twisted, replace it (Para- graph 5-35). f

• HP 7414A, Model 7414A Section VI Replaceable Parts SHAFT POSITION TRANSDUCER o TO MOUNTING NUT F \.-~----DRIVE COIL START 6 DRIVE COIL RETURN D) STYLUS HEAT 4 ) (9-2) RETURN B) (6) +12V : )~n7 '9-0 :::~~~:T::E:::::o A OSCILLATOR OUT 3 '9-1 SIGNAL GROUND GALVANOMETER CABLE AII-AI4WI (FOR REF. ONLY) NOTES' I. UNLESS NOTED, RESISTANCE IS IN OHMS,I/4W,5% ~R;NSFE;-I I BOARD I A3Al : r~~'~~' I JI5, JI6, GALVANOMETER I JI8,JI9 r-------~ I 8 >--.~ F )---++---"~ I I ) (5 1 2] , I COIL : I 'I r A 6>--+--+--''''-'''''-72 >-- (F, I W I I I I I I I : I I >-_-+-+-,(",-9-....::2"-7) 4 >--- ---« I ~ 1 4 &ap

• Model 7414A Table 6-1. Replaceable Parts (continued) Section VI Replaceable Parts Reference Designation A'JCl A9C2 A9C3 A9C~ A9C5 A9C& A9C7 A9C8 A9C9 A9CI0 A9Cll A9CIZ A9C13 A9Cl~ A9C15 A9Cl& A9C17 A9C18 A9C19 A9CZO A9CZl A9C22 A9C23 A9CRl A911 A9HPl A901 A902 A903 A90ft A905 A906 A9:17 A908 A9J9 A9010 A9011 A9012 A9013 A901ft A9015 A9016 A9011

• HP 7414A, Section IV Principles of Operation Model 7754A/7414A drive to Q17 momentarily, so the marker coil is energized and the marker makes a jog on the paper. The diode at the collector of Q17 removes the large transient that results when the marker solenoid stops conducting. 4-53. MARKER HEAT DRIVER. The marker heat ele- ments are powered from the -20 volt unregulated line. Heat regulation originates at the heat potentiometer sub- assembly of the front panel, and is applied to the base of Q10, which drives Q12, a series regulator that is similar to the vo

• HP 7414A, Model 7754A/7414A Section V Maintenance BRISTOL WRENCH o 4-40 BRISTOL SPLINE WRENCH HEX NUT HOLD HEX NUT STEADY WITH WRENCH WHILE TIGHTENING SETSCREW Figure 5-23. Gearbox Shaft End Play Adjustment CHART DRIVE MOTOR GEARBOX LUBRICATE INPUTCHAIN BEFORE INSTALLING TOP COVER 07754-1 Figure 5-24. Gearbox Input Chain Tension Adjustment 5-33

• HP 7414A, Model 7414A Table 6-1. Replaceable Parts (continued) Section VI Replaceable Parts Reference Designation A1 .A1 El A1MP1 A1MPZ A1MP) A1MP4 A1I'4P5 AHIP6 Al14P1 A1MP8 AZMP1 AZMPZ AZ14P3 AV4P4 AZMP5 AZ14P6 AZ14P1 AZMP8 AZ14P9 AZMP10 AZMP 11 AZMP1Z AZ14P13 AZMP14 AZ14P15 AZMP16 AZ14P11 AZMP18 AZMP19 AZMPZO AZMPZ1 AZMPZZ AZA1 A2A1C1 AZAlCZ A2AlC3 AZA1C4 AZA1C5 A2A1C6 AZA1CH AZA1CRZ AZAlCU AZA1CR4 AZA1JZ6 AZA1MP1 AZA1R1 AZAU3 AZA1Rlt AZA1R5 AZA1R6 AZAlR 1 AZA1R8 AZA1R9 AZA1R10 A2A1Rll AZAlSZ AZALU1 AZAZ HP Part Number 01154-60210 01154- 00411 2360-0182 01154-00063 01154-00064 01154-00010 2510-0123

• HP 7414A, Model 7414A Table 6-1. Replaceable Parts (continued) Section VI Replaceable Parts Reference Designation AttR 2 2 A4R23 AItR ZIt A4R25 AltR2b A4R27 AltR 2 8 A4R29 A4R30 A4R31 A4R32 A4R33 A4~34 A4R3b A4R37 A4R38 A4R39 A4R40 A4Hl A4R42 AltRlt3 A4Rlt4 A4Ul A4'J2 A4U3 A5 Ab A7 A8 A8 A8C 1 A8C2 A8C3 A8CIt A8C5 A8C~ A8C7 A8C8 A8C9 A8CIO A8Cll A8C12 A8C 13 A8C lit A8C15 A8Clb A8C17 A8C18 A8C19 A8C20 A8C21 A8C22 A8C23 A8CRl A811 A8/PI A801 A8'l2 A803 A8'lit A805 A80b HP Part Number 0686-2715 0686-1525 0686-1825 Ob86-5605 0683-1515 0683-1015 0811-1732 0683-2235 2100-2464 0757-0123 0683-2735 0683-1035 0683-1025 0698-6909 0683

• Section V Maintenance EXTENDER BOARD (Table 5-1) TEST SUPPORT (FIGURE 5-2) DRIVER AMPL!FIER OR REGULATOR/ OSCI LLATOR ASSEMBLY (TYPICAL) Model 7754A/7414A • I I Figure 5-3. Driver Amplifier and Regulator/Oscillator Test b. Check the spacing of the timing marks with a milli- meter scale. They should be 25 mm ± 1 %. Check again at 100 MM/SEC and 5 MM/SEC speeds, allowing a maximum e

• HP 7414A, I I Model 7414A MP5 MP3, MP4 ~ NOTE If service is required on remainder of galvanometer I return the entire assembly I which will be aligned at the factory. Do not return stylus. STY LUS 07754-60340 (Reference) Not Part of Galvanometer Assembly Section VI Replaceable Parts 07414-1 Figure 6-18. Galvanometer A 11, A 12, A 13, A 14 (07754-60070), Parts Location Diagram 6-33

• HP 7414A, Section VI Replaceable Parts ... 'E · ... E- en ._ C -I .0.... -I E.c ... co .~ ~ o a: -I Component Side Solder Side Model 7414A Figure 6-13. Driver Amplifier A4, A5, A6, A7 (07754-60170) Component Location Diagram 6-28 07414-1

• HP 7414A, EXTRA MKR SIGNAL iNPUT REMOTE RUN (-24V) REMOTE EVENT MKR INPUT REMOTE -24V OSC "B" OSC "A" 440 HZ +12V SIGNAL INTERRUPT (-12) HEAT CONTROL-RUN (-12) INTERLOCK (NO) -12V 24V/60HZ TO TIMER CKT +20V OSC GND REFERENCE GND SIGNAL GND POWER GND -20V Section VI Replaceable Parts -24V PIO A3AI (07754-60150) TRANSFER BOARD ASS'y 24V 20V WER GND GNAL GND OV 2V 2V oHZ C "A" C "B" MOTE -24V MOTE EVENT MKR. INPUT MOTE RUN (-24V) TRA MKR SIGNAL INPUT - ) E - ; 0 - ; II PO ) 12 SI )1 +2 ; 10 -I ~ ) 9 +1 >A 44 ; 3

• HP 7414A, Section V Maintenance 5-55. Solenoid Adjustment. 5-56. Adjust the solenoids (Figure 5-18) using the adjust- ment screw shown, and check while energized with a 0.01 feeler gage between the solenoid clapper and clutch sleeve. 5-57. GEARBOX BENCH RUN-IN. After lubricating the gearbox components, connect the gearbox to a recorder as shown in Figure 5-18. With the inspection plate removed, run the gearbox at lowest speed (selected at the recorder control panel). Excess Mystery Oil, applied in the pro- cedure in Paragraph 5-52 will run out from between

• HP 7414A, Section I General Information 1-15. MODEL 8801A LOW GAIN DC PREAMPLIFIER.- With a maximum sensitivity of 5 mV/div, the 8801A provides stable and precise amplification from dc to the limit of the recorder's capability, or up to 10kHz when used with an oscilloscope or other indicator. The 8801 A features calibrated zero suppression with limits of ±10 and ±100 volts. 1-16. MODEL 8802A MEDIUM GAIN DC PRE- AMPLIFIER. - The 8802A has a gain that is five times greater than the 8801A and zero suppression to ±2 and ±20 volts. Except for the common-mode tolerance, which is smaller by a factor of five on the hig

• HP 7414A, Section V Maintenance Model 7754A/7414A REMOVING FELT STEP 1 REPLACING FELT /- I I REMOVING FELT STEP 2 GALVANOMETER MOUNTING SCREW ACCESS HOLES (4) Figure 5-7. Paper Brake Felt Cover Removal and Replacement 5-16 07754-1

• HP 7414A, Section VI Replaceable Parts Table 6-2. Code List of Manufacturers Model 7414A 6-18 CODE 00:>0) 007B OUll 012~5 0266J 04713 0524!l 07263 0782~ 086b4 09927 131B 14~55 185 :n lQ101 21335 2848) 5628~ 70216 70903 11400 116H 71785 72136 13734 75915 76530 76~54 71342 78131 78211 18553 79136 80131 82142 8238~ 83U~ 915)~ 9166? 9841:> MANUFACTURER NAME U.S.A. COMMON AMP INC.IAIRCRAFT MARINE PI<OD.I ALLEN BRADLEY co. TEXAS INSTPUMFNTS INC. SEMICONDUCTOR COMPONENTS DIV. AMPHFNOL CORP. MOTO~DLA SEMI(DNDUCTD~ PRoO.INC. COMPONENTS CORP. FAIRCHILD CAMERA & INST. CJRP. SE~ICONOUCTDR DIV. BODINE ELECTRIC CO. BRI STOL CO. THE BlJRNDY C')RP. THERMAL L

• Model 7754A/7414A Table 5-3. Electrical Performance Checks and Adjustments (cont.) Section V Maintenance I I I u. Connect Scope between TP5 and signal ground, and set scope SE S control to 1V/CM. Scope must show pattern as in following photo: v. Set MODE switch to STDBY and remove test cable from 132 on rear of Recorder. Reconnect jumper cable 07754-60450 to 131

• Model 7754A/7414A Section IV Principles of Operation Take the 1mm/sec speed flow as an example (top row, third from left). Power input from the drive motor enters the gearbox via the input drive sprocket at the right side of the upper (primary) shaft. Since solenoids L1 and L2 are ener- gized, the first two sets of gears are directly coupled to the input sprocket by the spr

• HP 7414A, Model 7754A/7414A Section IV Principles of Operation SIGNAL INPUT PREAMPLIFIER J1l r--------------------------------::::::L- Jl GUARb -:::::-=;) ,.-, . ('-. A } SHIELb A I I I I' S!GNAL INPUT I I '" 3 8 -}' 'Ai .' -~ } TRANSDUCER D C 2 EXCITATION OUT (OR E , 5 SERVO REFERENCE IN) C < ,-, " 9 I I } DEPENDS ON I I ( PREAMPLIFIER I'-~ , 10 ,. ) 7 SIGNAL OUTPUT , 13 ,r"'\ th , - .. ------------t----------+--+---+_+ 11 440 HZ : } 2400 HZ +12V c~A I I D •. J ~~J - ---.!..- J UX J .1 CH 1 TYPI AL A +-+_-------------------------------:--:-+~ 8 ~ Et-+_-----------------4 ...... ------------"

• HP 7414A, Section VI Replacea ble RI 15 R22 330 5"1o,1/2W TP2v-_-- 'OOOB ~ Hr MI 440Hz OSC. R23 AMPL. 5.6M ADJ. ~ CW RIO 500 / IW , / ~ , / , / , / ~ , / " / "- / "- / ~ ~ , / , / , / ~ , / "- / "- / , ~ RI8 1500 5%. II2W ---< RI9 330 5%.1/2W ~RI ;+- ~R2 ~ ~ 50K 50K 1/2W CW 1/2W CW r------- I I I I I ELAPSED I~~~R ------------- J25 -- / 6 "- ;- (7 "- / 4 "- / /10 "- / /1l2 "- / ,,8 ~ , ,,17 / /18 " I, / , 19 13 9 I k l / ~ 21 "- RI:F R2~F R3~F R1P 500 500 .500 500 II2W 1/2W 1/2W 1/2W ~14 / / >0 , / 15 "- / 16 "- / ( " "- / 2 , .... i- A2A2 (07754-60130) HEAT CONTROL J25 P.e. BOARD ASS

• HP 7414A, Section VI Replaceable Parts Table 6-1. Replaceable Parts (continued) Model 7414A Reference HP Part Number Qty Description Mfr Mfr Part Number Designation Code 2340-0001 NUT:HEX 4-40 X 0.188" ACROSS FLAT 00000 080 2200-0113 SCRE .. :PAN HD POZI DR ~-40 X 0.625- LG 00000 080 A3UJ29 1251-2422 2 CONNECTOR:PC 12 CONTACT 91662 00-8129-012-603-002 A3Al J30 1251-2422 CONNECTOR:PC 12 CONTACT 91662 00-8129-012-603-002 A3AlUl 0115~00150 1 80ARo:8LANK PC 28480 0115~-00150 0360-1491 21 TERMINAL:SOLoER STUD 28480 0360-1491 0403-0063 1 8UMPER:RU88ER 8UTTON, PRESS TYPE 13134 FSP 115201 A4 01154-60110 DRIVER AMPLIFIERIFIG. 6-13) 28~80 01154-60110 A4C1 0180-0106 8 C:FXo ELECT 60 UF

• HP 7414A, Model 7754A/7414A Table 5-4. Paper Drive Troubleshooting Section V Maintenance Trouble IMPROPER PAPER TRACKI G (paper moves to one side or the other) PAPER TEARS AT Z-FOLD PAPER JAMS I PRESSURE ROLLER PAPER WEAVES FROM SIDE TO SIDE IRREGULAR PAPER SPEED I CORRECT PAPER SPEED oPAPER DRIVE oSIG AL 0 PAPER Probable Cause Worn brake felt or bent paper guide. Uneven tension on paper brake arm adjustment screws. Excessive brake pad pressure. Also see next item. One pressure roller spring is weaker than the other. Paper brake arm tens

• HP 7414A, Model 7754A/7414A PRIMARY SHAFT COMPONENTS INSPECT FOR WEAR AT THESE POINTS, TYPICAL OF 8 PLACES Section V Maintenance 01 L SHAFT BEARINGS WITH MYSTERY OIL (TYPICAL LOCATION) FOR RUN-IN INSPECT FOR DAMAGED SLEEVES AND SPRINGS 1. 2. 3. 07754-1 Figure 5-21. Spring Clutch Lubrication (Primary Shaft) 5-31

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