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Hameg HM1004, Руководство по обслуживанию

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Subject to change without notice

42

ADJUSTMENT PROCEDURE

Analog Scope HM1004 / HM1505

WARNING
The Instrument must be disconnected from the mains power supply whenever you open
the case, repair or exchange parts.

HIGH VOLTAGE WARNING!

Hazardous High Voltage of up to 12,000 Volts is present inside this Instrument. The areas
particularly affected by High Voltage are the high voltage circuit on the PS-board, the CRT
anode contact and the CRT-board.

SERVICE AND ADJUSTMENT

•

of  this  instrument should only be performed in  accordance   and  in  conjunction   with  the

  operating  manual  and  the WARNINGS contained therein,  particularly „Service Instructions“
 and „Operating Instructions“.

•

should only be performed by suitable qualified and experienced service personnel, or should be

  referred to one of the HAMEG companies listed on the rear cover of the manual.

Test Instruments required:

1)

Scope Tester HZ 60-2.

2)

Constant amplitude sinewave generator, 20Hz - 250MHz, output 5mV - 5V into 50

Ω

,

preferably with 20dB attenuation (e.g. HM 8133, TEK SG502 + TEK SG503).

3)

Amplitude Calibrator with 1kHz square wave output and 600

Ω

 impedance, risetime faster

than 150ns. Output voltage 2mV - 20Volts in 1-2-5 sequence for 4 divisions display
amplitude (e.g. HZ62, TEK PG506).

4)

Time mark generator from 5ns/div to 5s/div.

Output min. 10mV into 50

Ω

 (e.g. HZ62, TEK TG501).

5)

Pre-attenuator 2:1 (1 M

Ω

 parallel with 12-48pF), e.g. HZ20.

6)

50

Ω

 BNC through termination, e.g. HZ22.

7)

2 BNC-cables, 50

Ω

, e.g. HZ34.

8)

BNC-T-connector.

9)

Oscilloscope probe 10:1, with exactly 9M

Ω

 series resistance

and compensated for test oscilloscope mentioned under 10).

10) Oscilloscope 100MHz, 5mV/div to 5V/div, e.g. HM1005.
11) Trimming/adjusting tool.
12) Variable output safety insulation transformer.
13) Video signal generator with positive and negative signal output.

This procedure covers all adjustments and the most important - but not all - performance checks.
The correct sequence of all adjustment steps must be strictly followed.

Exact adjustment is only possible when any influence of the earths‘ magnetic field has been
compensated with the trimmer marked TR (trace rotation).

All adjustments should only be performed by qualified and experienced personnel. This is particularly
important for adjustments in the high voltage section of the instrument.

NOTE
The adjustment procedures assume that the instrument had once been properly adjusted in
the factory and adjustments are required due to temperature drift or the replacement of
defective components.

Содержание HM1004

Страница 1: ... Instruments SERVICE MANUAL HM1004 Oscilloskop HM1004 ENGLISH 4S 1004 00E0 01 NOV 1996 ...

Страница 2: ...ard 22 Readout Board 23 Readout Board Bottomside 24 Readout Board Topside 25 FC Board 26 FC Board 27 FC Board Topside 28 Processor Board 29 FC Board Bottomside and Processor Board 30 IF Board 31 IF Board Top and Bottomside 32 CRT Board 33 CRT Board Bottom and Topside 34 PS Board 35 PS Board Topside 36 PS Board Bottomside 37 Timebase control 38 Timebase A 38 Timebase B 38 Name Meaning and Type of s...

Страница 3: ...ge category Catégorie de surtension II Verschmutzungsgrad Degree of pollution Degré de pollution 2 Elektromagnetische Verträglichkeit Electromagnetic compatibility Compatibilité électromagnétique EN 50082 2 1995 VDE 0839 T82 2 ENV 50140 1993 IEC CEI 1004 4 3 1995 VDE 0847 T3 ENV 50141 1993 IEC CEI 1000 4 6 VDE 0843 6 EN 61000 4 2 1995 IEC CEI 1000 4 2 1995 VDE 0847 T4 2 Prüfschärfe Level Niveau 2 ...

Страница 4: ...anal I und Kanal II alternierend oder chop Chopperfrequenz ca 0 5MHz Summe oder Differenz von K I und K II beide Kanäle invertierbar XY Betrieb über Kanal I und Kanal II Bandbreite HM1004 2x 0 100MHz 3dB HM1505 2x 0 150MHz 3dB Anstiegszeiten HM1004 3 5ns HM1505 2 3ns Überschwingen max 1 Ablenkkoeffizienten 14kalibrierteStellungen von 1mV cm bis 20V cm mit 1 2 5 Teilung variabel 2 5 1 bis mindesten...

Страница 5: ...Subject to change without notice 4 HM1004 Block diagram ...

Страница 6: ...5 Subject to change without notice HM1004 Block diagram ...

Страница 7: ...Subject to change without notice 6 att14 sch 1 Tue Oct 29 12 14 03 1996 AT Board ...

Страница 8: ...7 Subject to change without notice AT Board ...

Страница 9: ...Subject to change without notice 8 AT Board ...

Страница 10: ...9 Subject to change without notice AT Board Topside ...

Страница 11: ...Subject to change without notice 10 AT Board Bottomside ...

Страница 12: ...11 Subject to change without notice MB Board ...

Страница 13: ...Subject to change without notice 12 MB Board ...

Страница 14: ...13 Subject to change without notice MB Board ...

Страница 15: ...Subject to change without notice 14 MB Board ...

Страница 16: ...15 Subject to change without notice MB Board ...

Страница 17: ...Subject to change without notice 16 MB Board ...

Страница 18: ...17 Subject to change without notice MB Board ...

Страница 19: ...Subject to change without notice 18 MB Board Topside ...

Страница 20: ...19 Subject to change without notice MB Board Bottomside ...

Страница 21: ...Subject to change without notice 20 YF Board ...

Страница 22: ...21 Subject to change without notice YF Board Top and Bottomside ...

Страница 23: ...Subject to change without notice 22 Readout Board ...

Страница 24: ...23 Subject to change without notice Readout Board rd1004 sch 2 Wed Sep 25 11 50 19 1996 ...

Страница 25: ...Subject to change without notice 24 J7012 Readout Board Bottomside ...

Страница 26: ...25 Subject to change without notice Readout Board Topside ...

Страница 27: ...Subject to change without notice 26 key1007 sch 1 Wed Sep 25 11 51 53 1996 FC Board FC Board 1004 ...

Страница 28: ...27 Subject to change without notice key1007 sch 2 Wed Sep 25 11 52 15 1996 FC Board FC Board 1004 ...

Страница 29: ...Subject to change without notice 28 FC Board Topside ...

Страница 30: ...29 Subject to change without notice Processor Board Proc Adapt Z86E63 ...

Страница 31: ...Subject to change without notice 30 FC Board Bottomside and Processor Board ...

Страница 32: ...31 Subject to change without notice IF Board Note IF304 IF1004 1505 ...

Страница 33: ...Subject to change without notice 32 IF Board Top and Bottomside ...

Страница 34: ...33 Subject to change without notice CRT Board ...

Страница 35: ...Subject to change without notice 34 CRT Board Bottom and Topside ...

Страница 36: ...35 Subject to change without notice PS Board ...

Страница 37: ...Subject to change without notice 36 PS Board Topside ...

Страница 38: ...37 Subject to change without notice PS Board Bottomside ...

Страница 39: ...0µs H H H L H H 5µs H H L L H H 2µs H H L H L H 1µs H H H L L H 500ns H H L L L H 200ns H H L H H L 100ns H H H L H L 50ns H H L L H L C SW1 C SW2 IB 2 IB 5 IB 10 IB 100 20ms L H L H H H 10ms L H H L H H 5ms L H L L H H 2ms L H L H L H 1ms L H H L L H 500µs L H L L L H 200µs L H L H H L 100µs L H H L H L 50µs L H L L H L 20µs H H L H H H 10µs H H H L H H 5µs H H L L H H 2µs H H L H L H 1µs H H H L...

Страница 40: ...Signal MB prepared for digital board 28 DY22 Signal MB prepared for digital board 29 END HO digital MB indicates the end of the holdoff time 30 END SW A MB indicates the end of timebase A ramp 31 END SW B MB indicates the end of timebase B ramp 32 EXT SW Signal MB AT external trigger signal 33 FOC_CTR analog MB CRT line from focus potentiometer to CRT 34 FOC_FC analog MB FC line from focus potenti...

Страница 41: ...ital board 76 TRACE DA analog 8 bits MB Y position of the separated Y Signal 77 TR A IN MB trigger signal A 78 TRA LEV analog 10 bits MB trigger level A 79 TR B IN MB trigger signal B 80 TRB LEV analog 10 bits MB trigger level B 81 TRCOUNT digital MB Autoset trigger counter normal mode trigger interrupt 82 ADJ analog 8 bits MB DC AP at trigger amplifier output 83 TRGMP analog MB trigger amplifier ...

Страница 42: ...41 Subject to change without notice HM1004 1505 Adjustment Procedure ...

Страница 43: ...Output voltage 2mV 20Volts in 1 2 5 sequence for 4 divisions display amplitude e g HZ62 TEK PG506 4 Time mark generator from 5ns div to 5s div Output min 10mV into 50Ω e g HZ62 TEK TG501 5 Pre attenuator 2 1 1 MΩ parallel with 12 48pF e g HZ20 6 50Ω BNC through termination e g HZ22 7 2 BNC cables 50Ω e g HZ34 8 BNC T connector 9 Oscilloscope probe 10 1 with exactly 9MΩ series resistance and compen...

Страница 44: ...on x10 53 27 R9008 Y Gain CH I 55 28 Y Gain CH II 55 29 R7002 R7003 R7001 R 7005 Readout Position 55 30 R4839 XY Gain 55 31 VR7006 Calibrator Output 55 32 Trigger Filter Check 56 33 Triggerbandwidth Check 56 34 External Trigger Check 56 35 Error Code Tabelle 57 Before starting each adjustment procedure set the oscilloscope to the following basic settings X Section TIME DIV TB A 100ns readout TIME ...

Страница 45: ...Subject to change without notice 44 1 2 PS Board 1 8 J4400 MB Board CRT Board 5 4 Front Panel HM1004 3 6 R9037 6B 6A YF Board ...

Страница 46: ... the basic setting 4 R6013 CRT minimum intensity Locate and identify R6013 4 on CRT Board Set INTENS control to fully left position beep Press ADD XY pushbutton briefly for XY mode readout both channel deflection coefficients and XY Adjust R6013 4 so that the dot just disappears Press ADD XY pushbutton briefly for time base mode 5 R6024 Astigmatism correction Locate and identify R6024 5 on CRT Boa...

Страница 47: ...Subject to change without notice 46 AT Board 10 9 11 12 7A 7B R9037 YF Board 8 MB Board Detail Readout Board Detail 7 ...

Страница 48: ... intensity setting Turn the INTENS knob fully clockwise beep for maximum readout intensity setting Adjust R5015 8 for maximum readout sharpness 9 R2001 10Hz Squarewave 5mV div CH I Locate and identify R2001 9 in CH I section of the AT Board Connect a 25mVpp 10Hz square wave signal via 50Ω cable and 50Ω through terminator to input channel I Set time base to 10ms div Adjust R2001 9 for flat top 10 R...

Страница 49: ...Subject to change without notice 48 13B 13A 13C 13D 13E YF Board AT Board 15B 15A 15D 15C 16B 16A 16D 16C MB Board Detail 13F 13G 13H ...

Страница 50: ...identify trimmers C2004 15C C2005 15D C2010 15A and C2011 15B in CH I section of the AT Board Set time base switch to 0 2ms div Set amplitude calibrator to 1kHz connect a 50Ω cable at the generator output and via a 2 1 pre attenuator to input of CH I Set calibrator output voltage to 80mVpp 40mVpp at the 2 1 pre attenuator output Check for 8 divisions signal height 5mV div attenuator setting Adjust...

Страница 51: ...Subject to change without notice 50 High Light Display select 22 23 21 MB Board UP DOWN ENTER ...

Страница 52: ...DEL POS left until Dt 39 0µs in display shows Adjust R4481 21 the dim A trace 2mm before the bright B trace 22 R4430 B Sweep Start Position Locate and identify R4430 22 on MB Board Adjust R4430 22 to the beginning of A trace on left side 23 R4841 X Gain x1 Locate and identify R4841 23 on MB Board Adjust R4841 23 for 10 2 div sweep length 24 A Time Base Adjustment Note Now the adjustment mode is pr...

Страница 53: ...Subject to change without notice 52 MB Board 26 ...

Страница 54: ... for normal triggering mode Turn TRIG LEVEL knob for exact triggering Set A time base to 5µs div Press A ALT B pushbutton two times Set B time base to 50ns Move trace with X Pos control so that the first time mark coincides with the first left graticule line of the screen Rotate VAR 2 5 1 TIME DIV 24 until the 11th time mark coincides with the last right graticule line If only 10 time marks are vi...

Страница 55: ...Subject to change without notice 54 27 YF Board 31 Readout Board Detail 29B 29A 29C MB Board Detail 30 29D Readout Board Detail Pin 14 Pin 1 ...

Страница 56: ... 7005 29D to the position on the CRT GRID Set trace with POS I to upper net line Set trace with POS II to lower net line Press SAVE pushbutton once Set trace with POS I to lower net line Set trace with POS II to upper net line Press SAVE pushbutton once Press RECALL pushbutton to exit Y1 2 POSITION adjust Press AUTOSET pushbutton once to exit CALIBRATION MENUE 30 R4839 XY Gain Press CH II pushbutt...

Страница 57: ...0kHz and 25mV output amplitude and check for 5mm display height Select trigger coupling from AC DC HF and LF Except in LF trigger coupling condition the signal must always trigger the oscilloscope 33 Triggerbandwidth Check Set time base to 50ns div Connect a 200MHz sinewave signal to input CH I Adjust generator output for 5mm display height The signal must be triggered 34 External Trigger Check Se...

Страница 58: ...nvert Balance Adjustment ERROR 0A adjustment impossible Voltage range at IC3009B main board or at IC2011 R2263 attenuator board exceeded Supposed error Y amplifier between IC2012 and transistors T3004 5 T3010 11 main board ERROR 13 is displayed if the peak peak circuit is defective CH2 AMP 1 Automatic Attenuator Balance Adjustment ERROR 10 adjustment impossible Voltage range at TRGMP R4041 on main...

Страница 59: ...OR 0C adjustment impossible Voltage range at TRGMP R4041 on main board exceeded 2 CH2 Automatic Trigger Operating Point Adjustment Determines the trigger operating point under HF trigger coupling conditions and sets it to the same value as under AC trigger coupling conditions ERROR 0D adjustment impossible Voltage range at TRGMP R4041 on main board exceeded Adjustment by T4023 main board 3 Automat...

Страница 60: ...o uk Spain HAMEG S L Villarroel 172 174 08036 BARCELONA Teléf 93 4301597 Telefax 93 321220 E mail email hameg es France HAMEG S a r l 5 9 av de la République 94800 VILLEJUIF Tél 1 4677 8151 Telefax 1 4726 3544 E mail hamegcom magic fr Germany HAMEG GmbH Industriestraße 6 63533 Mainhausen Tel 06182 8909 0 Telefax 06182 8909 30 E mail sales hameg de HAMEG Service Kelsterbacher Str 15 19 60528 FRANKF...

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