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HP 546A Logic Pulser, Operating And Service Manual, Page: 21 / 54

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Summary of Contents for 546A Logic Pulser

Page 1: ...Flio HEWLETT PACKARD ...

Page 2: ... Century Road Paramus 07652 IN CANADA QUEBEC Hewlett Packard Canada Ltd 275 Hymus Blvd Pointe Claire IN CENTRAL AND SOUTH AMERICA Hewlett Packard Intercontinental 3200 Hillview Ave Palo Alto California 94304 ...

Page 3: ...r customer assistance agreements are available for Hewlett Packard products For any assistance contact your nearest Hewlett Packard Sales and Service Office Addresses are pro vided at the back of this manual 010000 A 237 ...

Page 4: ...AL CHANGE S 1 thru 3 01A2132 01A2312 02A2312 00546 60100 Series 2012 SERIAL PREFIX SERIES NUMBER OR DATE CODE 1 2 00546 60100 Series 2008 C5460SX 1 6809 6812 2 8886E 3 9712E 4 12414 12007 5 14585 Flin HEWLETT PACKARD MANUAL CHANGES MODEL 546A 00546 90005 Page i Insert this Warning after the Certification Warranty and Assistance which is the inside front cover WARNING This product should be connect...

Page 5: ...0546 60003 Series 1732 NOTE The circuit board is changed mechanically to incorporate an improved push switch The new 00546 60003 circuit board is electrically identical to the 00546 60002 SERIES 1644 circuit board ...

Page 6: ...46 40001 to 00546 40004 Add MP10 00546 40003 RETAINER SWITCH BLK PLASTIC 28480 00546 40003 Add MP11 0624 0340 2 SCREW SELF TAPPING 0 42 MP10 MTG 28480 0624 0340 Add MP12 7120 5268 NAMEPLATE 28480 7120 5268 BOTTOM HALF Add MP13 7120 5274 LABEL OPERATING 28480 7120 5274 TOP HALF ...

Page 7: ...placeable Parts Change Al from series 2008 to 2012 Change A1C1 0160 4422 to 0160 5238 CAPACITOR FXD B2UF 20 50VDC DISC CER Page 36 Figure 16 Al Schematic Diagram ChangeAl Series from 2008 to 2016 Change A1Cl from 1uf to 82uf ...

Page 8: ...nsed Series Code When a change occurs to any model of HP logic probe family which affects the schematic parts list or specifications the condensed SERIES CODE is incremented by one The letter A designates the country of origin A indicates USA ...

Page 9: ...80 0291 lUF 10 35 VDC TA Change R3 from 0698 7284 lOOK to 0698 7260 10K 1 05W F TC O 100 Page 36 Figure 16 Al Logic Pulser Assembly Schematic Diagram Change the value for C6 from 1UF to lUF Change the value for R3 from lOOK to 10K IICHANGE 6 On the Title page Change the Configuration Code from 01A to 02A ...

Page 10: ... _ Figure 1 HP 546A Logic Pulser ...

Page 11: ... NUMBER The Logic Pulser does not have a serial number It does have a four digit series number which is stamped on the printed circuit board Refer to this number and the circuit board part number in any correspondence pertaining to maintenance ...

Page 12: ...ble Tip Set HP Operating Voltage Range Part No 00545 60104 TTL 5 10 vdc CMOS 3 18 vdc Operating Current 5 35 mA Specifications apply over stated operating voltages and temperatures for all pulse output modes 2With ground clip attached near load ...

Page 13: ...Tip Kit 00545 60104 10526 60002 Multi Pin Stimulus Kit Figure 2 546A Logic Pulser Accessories Available ...

Page 14: ...e tip of the Logic Pulser When maximum current output is desired use the ground cable supplied with the Pulser to make the common return path as short as possible Current pulses from the Pulser can be more than 650 mAo The ground cable reduces the IR drop and the lead inductance ...

Page 15: ...witch is pressed Pulses can be injected while the circuit is operating and no disconnections are needed The multi pin stimulus kit Figure 2 is useful for stimulating up to four inputs of a gate at the same time or for stimulating four different circuit nodes The Pulser s power input and output tip circuits are protected against overvoltage and reverse polarity ...

Page 16: ... 0 1 second burst of 10 pulses once each second 0 1 10 Hz rrn ill 546A LOGIC PULSER z 100 0 BURST 0 100 aURST H HEWLETT PACKARD ...

Page 17: ... pulses generated when a burst is programmed are subtracted from the first burst e g a 100 burst is output as 1 1 98 lOa lOa etc Releasing the switch in any output mode other than midburst terminates output and allows a new mode to be programmed immediately Releasing the switch for longer than 1 second erases the programming of previous pushes 3 4 5 6 ...

Page 18: ...Pulser 545A Logic Probe Solder Bridge 546A Pulser 547A Current Tracer Sequential Logic Fault 546A Pulser 548A Logic Clip Shorts to Vcc or Ground 546A Pulser 545A Logic Probe Multi Pin Testing 546A Pulser 10529A Logic Comparator ...

Page 19: ...SL GATE UNDER TEST Figure 3 Logic Gate Testing ...

Page 20: ...I I PROBE LIGHT DOES NOT CHANGE STATE LINE IS SHORTED TO Vee OR GROUND Figure 4 Testing for Shorts ...

Page 21: ...Figure 5 Multi pin Testing with Logic Clip ...

Page 22: ...ation from the same reference point Figure 6 Multi pin Testing with Logic Comparator ...

Page 23: ... the two gates and place the Current Tracer s tip on the Pulser s pin Pulse the line in the 100 Hz continuous mode and adjust the Current TracerJs sensitivity control until the indicator just lights First place the Current Tracer tip next to gate A and then gate B while continuing to excite the trace The tracer will light only on the gate A sideJ since gate A J the defect in this example is sink i...

Page 24: ...TRACER WILL LIGHT HERE BUT NOT ON OTHER GATES Figure 7 Wire AND Node Fault ...

Page 25: ... oWS W coYcmA I Figure 8 Gate to Gate Faults ...

Page 26: ... for the low voltage logic on the Ie MODE SELECT CONTROL Determines whether the instrument is programming a mode or execut ing a mode and when to reset SWITCH INPUT CONTROL Presets the time base counter and burst control circuit generates a single shot pulse to the output and debounces the switch ...

Page 27: ...L I _ COUNTER r CLOCK I I I Figure 9 Pulser Block Diagram ...

Page 28: ...ce exists between the light output of the LED and the tip output of the probe Since the human eye cannot see a 100 Hz 10 J ls blink the LED pulses are actually slowed down and stretched driving the LED at a slower rate indicating the particular activity at the tip Switch S1 is used to program the mode of U1 Resistor R3 and capacitor C6 are the timing elements that control the accuracy and frequenc...

Page 29: ...a overcurrent cycle occurs If the load presents a low impedance to ground the 1 overcurrent cycle occurs These cycles are described in the following paragraphs Waveforms of the overcurrent conditions are shown under test procedure paragraphs Immediately prior to any output pulse cycle capacitor C2 is charged to V capacitor Cl is discharged by resistor Rl to avolts transistors Ql and Q2 are off and...

Page 30: ... disassembly and assembly and parts re placement information Test Procedures The following performance tests ensure that the Pulser is operating properly Test equipment re quired is listed in Table 4 Test equipment having equivalent characteristics may be substituted ...

Page 31: ...Counter 0 10 MHz 5300B 5301A Resistor TRMR 200 10 2100 2413 Resistor 6 2 0 5 25W 0683 0625 Resistor 3 6 0 5 25W 0683 0365 Resistor 2 lK 5 25W 0683 1025 Capacitor 10 MF 10 20V 0180 0374 ...

Page 32: ...ulse at 5V Test Connect the equipment as shown in Figure 11 and proceed as follows a Set the power supply to 5V b Press Pulser pushbutton and latch while observing oscilloscope for the waveform shown in Figure 11 ...

Page 33: ...NOTE KEEP LEADS SHORT OV Figure 10 Functional Output Test ...

Page 34: ...NOTE KEEP LEADS SHORT OV Figure 11 0 Output Pulse at 5V Test Setup ...

Page 35: ...n and latch c Set the variable resistor to the values listed below while observing the oscilloscope for the out puts shown in waveform B from left to right in order of the values listed below 10 ohms 50 ohms 100 ohms 200 ohms ...

Page 36: ...NOTE KEEP LEADS SHORT OV OV Figure 12 On Output Pulse at 12V Test Setup ...

Page 37: ... the variable resistor to 200 ohms c Set counter in Totalize mode d Press Pulser pushbutton and release while observing counter The counter should totalize each repeated action e Program the Pulser per the switch action column in Table 2 The counter should indicate the frequency and burst action shown in the table ...

Page 38: ...5V 1 SHUTDOWN OV OV OV 12V 1 OUTPUT 12V 1 FAMILY OUTPUTS Figure 13 u1 Output Pulse Test Setup ...

Page 39: ...verse of the above disassembly procedure CAUTION BE CAREFUL WHEN REPLACING PARTS ON THE FRAGILE PRINTED CIRCUIT BOARD EXCESS HEAT CAN RUIN THE BOARD USE A LOW WATTAGE 25 WATTS IRON AND APPLY THE MINIMUM HEAT NECESSARY TO UNSOLDER THE LEADS ...

Page 40: ... NOTE MP3 NOT USED IN ALL PULSERS SEE PAGE 23 Figure 14 Pulser Disassembled ...

Page 41: ...No 0 output Q2 and U1 Overcurrent shutdown fails to operate U1 C1 and R2 Program mode failure U1 Q3 and 51 ...

Page 42: ...A1MPl 00545 20202 1 Stud Tip 28480 00545 20202 A1Ql 1853 0271 1 Transistor PNP 51 04713 2N4403 A1Q2 1854 0568 1 Transistor NPN 51 28480 2N5845A A1Q3 1853 0389 1 Transistor PNP 51 28480 1853 0389 ...

Page 43: ... Tip 28480 00547 40005 MP8 00546 40001 1 SWitch Slider 28480 00546 40001 W1 00547 60100 1 Cable Assembly Probe 28480 00547 60100 W2 00545 60105 1 Cable Assembly with Grabber 28480 00545 60105 NOT NEEDED WITH 00546 40002 WINDOW WHICH HAS PROTRUDING STUD ON REAR IF 00545 40001 WINDOW LESS REAR STUD IS USED MP3 IS REQUIRED ...

Page 44: ......

Page 45: ...PART NO 00546 60001 CIRCUIT BOARD SERIES 1608 1616 AND 1624 BREAKDOWN DIODE CR1 ONLY IN SERIES 1624 Figure 15 Pulser Component Locators ...

Page 46: ...I JI I 00546 8 3 R2 10K OV Figure 16 A 1 Logic Pulser Assembly 00546 60002 Series 1644 Schematic Diagram ...

Page 47: ...Page 32 Table 6 Replaceable Parts Change A1 series number to 1624 Add A1DS2 1990 0582 1 LED Red Page 36 Figure 16 A1 Schematic Diagram Change A1 series number to 1624 Add DS2 LED in parallel with DS1 ...

Page 48: ...Delete A1CR1 breakdown diode HP Part No 1902 3234 Page 36 Figure 16 A1 Schematic Diagram Change A1 series number to Series 1608 and 1616 Delete A1CR1 breakdown diode ...

Page 49: ...Copyright HEWLETT PACKARD COMPANY 1976 5301 STEVENS CREEK BLVD SANTA CLARA CALIF 95050 Printed MAY 1977 MANUAL PART NO 00546 90005 MICROFICHE PART NO 00546 90006 PRINTED IN U S A HEWLETT PACKARD ...

Page 50: ...Theory of Operation 16 Power Supply 16 Integrated Circuit U1 16 Detailed Circuit Analysis 18 Overcurrent Output Shutdown 19 ...

Page 51: ......

Page 52: ...IJ ...

Page 53: ...14 15 16 Pulser Disassembled 30 Pulser Component Locators 35 A1 Logic Pulser Assembly 00546 60002 Series 1644 36 ...

Page 54: ...MANUAL PART NO 00546 90005 F iOW HEWLETT PACKARD P RINTED IN U S A ...

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