Hameg HM303-4 电路图.pdf

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1、 Instruments Oscilloscope HM 303-4 ENGLISH 4S-0303-04E0 10 JUN 1998 SERVICE-MANUALHM303-4 RadioFans.CN 收音机爱 好者资料库 Subject to change without notice 1 Y-Preamplifier CH I (YP-Board). 4 Y-Preamplifier CH II (YP-Board). 5 Y-Intermediate Amplifier and Trigger Amplifier (YP-Board) . 6 YPA-Board (Top side)

2、. 7 YPA-Board (Bottom side) . 8 XY-Amplifier, YF-Amplifier, OS-Circuit . 9 XY-Board (Top side) . 10 XY-Board (Bottom side). 11 Sync.-Amplifier. 12 Time base . 13 Sweep-Generator . 14 TB-Board . 15 CRT-Board . 16 CRT-Board (Top and Bottom side) . 17 Power Supply (PS-Board). 18 PS-Board (Top side). 19

3、 PS-Board (Bottom side) . 20 Component tester, Calibrator . 21 CCT-Board (Top and Bottom side) . 22 Front-Control Board. 23 Front-Control Board (Top and Bottom side) . 24 ADJUSTMENT PROCEDURE . 25 Table of contents Service Manual Circuit Diagrams Adjustment Procedure HM303-4 St. 100698. Hb/goRR Radi

4、oFans.CN 收音机爱 好者资料库 Subject to change without notice 2 RadioFans.CN 收音机爱 好者资料库 Subject to change without notice 3 30MHz Standard Oscilloscope HM303 Accessories supplied: Line cord, Operators Manual, 2 Probes 1:1/10:1 Specifications Vertical Deflection Operating modes: Channel I or II separate, both

5、Channels (alternated or chopped), (Chopper frequency approx. 0.5MHz). Sum or difference with Ch. I and Ch. II (both channels invertable). XY-Mode: via channel I and channel II Frequency range: 2xDC to 30MHz (3dB) Risetime: 12ns. Overshoot 1%. Deflection coefficients: 12 calibrated steps from 5mV/div

6、. to 20V/div. (1-2-5 sequence) with variable 2.5:1 up to 50V/div. Accuracy in calibrated position: 3% Y-expansion x5 (calibrated) to 1mV/div. (5%) in the frequency range from DC - 10MHz (3dB) Input impedance: 1M II 20pF. Input coupling: DC-AC-GD (ground). Input voltage: max. 400V (DC + peak AC). Tri

7、ggering Automatic: (peak to peak) 20Hz-100MHz ( 0.5div.) Normal with level control: DC-100MHz (0.5div.) ALT. Triggering; LED indicator for trigger action Slope: positive or negative, Sources: Channel I or II, CH. I alternating CH II, line, external Coupling: AC (10Hz to 100MHz), DC (0 to 100MHz), LF

8、 (0 to 1.5kHz) Active TV-Sync-Separator (pos. and neg.) External: 0.3p-p from 30Hz to 30MHz Horizontal Deflection Time coefficients: 20 calibrated steps from 0.2s/div. - 0.1s/div. in 1-2-5 sequence Accuracy in calibrated position: 3%. Min. speed incl. variable 2.5:1 up to 0.5s/div. with X-Mag. x10:

9、5%; 10ns/div.: 8% Holdoff time: variable to approx. 10:1 Bandwidth X-amplifier: 0-3MHz (3dB). Input X-Amplifier via Channel II, (sensitivity see Channel II specification) X-Y phase shift: 3 below 220kHz. Component Tester Test voltage: approx. 6Vrms (open circuit). Test current: approx. 5mArms (short

10、ed). Test frequency: approx. 50Hz Test connection: 2 banana jacks 4mm One test lead is grounded (Safety Earth) General Information CRT: D14-364GY/123 or ER151-GH/-, 6 rectangular screen (8x10cm) internal graticule Acceleration voltage: approx 2000V Trace rotation: adjustable on front panel Calibrato

11、r: square-wave generator (tr 4ns) 1kHz / 1MHz; Output: 0.2V 1% and 2V Line voltage: 100-240V AC 10%, 50/60Hz Power consumption: approx. 36 Watt at 50Hz. Min./Max. ambient temperature: 0C.+40C Protective system: Safety class I (IEC 1010-1) Weight: approx. 5.6kg, color: techno-brown Cabinet: W 285, H

12、125, D 380 mm Lockable tilt handle 5/96 Screen photo of 1 MHz square wave signal Screen photo of 50 and 100MHz sine wave with alternate triggering The new HAMEG HM303 oscilloscope succeeds the HM203 (over 170,000 sold worldwide). The bandwidth has been extended from 20 to 30MHz, the sweep rate incre

13、ased to 10ns/div. and improvements added to the already legendary HAMEG auto triggering system. The HM303 is the ideal instrument for waveform display in the DC to 100MHz frequency range. A key feature of this oscilloscope is the vertical amplifiers pulse fidelity, limiting overshoot to only 1%. The

14、 HM303 offers a special fast rise time 1kHz/1MHz Calibrator, permitting high quality probe compensation across the entire frequency range to ensure probe-tip thru to display integrity. An Overscan Indicator assists in vertical display amplitude and position adjustment. The HM303 is capable of trigge

15、ring on input waveforms over 100MHz and on signal levels as small as 0.5 division. Alternate triggering mode enables the display of two asynchronous signals simultaneously. An active Video Sync- Separator permits detailed examination of complex TV signal inputs. A well proven, built-in component tes

16、ter is now equipped with a stabilized measuring voltage. The use of a switching type of power supply minimizes both weight and power consumption and universally accepts a wide range of input power line voltages, without the requirement to change jumpers or switch positions. The HM303s CRT is fully m

17、u-metal shielded against outside magnetic fields. HAMEG is setting new price/performance breakthroughs with the introduction of this fine oscilloscope. This performance packed scope will tempt all users to run it through its paces. OSCILLOSCOPES Dual Channel, DC to 30MHz, 1mV/div.; Overscan Indicato

18、r Time Base: 0.2s to 10ns/div.; Variable Holdoff; Alternate Triggering Triggering: DC-100MHz; Auto Peak to Peak; Active TV-Sync-Separator Additional Features: Component Tester, 1kHz/1MHz Calibrator Subject to change without notice 4 Y-Preamplifier CH I (YP-Board) Subject to change without notice 5 Y

19、-Preamplifier CH II (YP-Board) Subject to change without notice 6 Y-Intermediate Amplifier and Trigger Amplifier (YP-Board) Subject to change without notice 7 YPA-Board (Top side) Subject to change without notice 8 YPA-Board (Top side) Subject to change without notice 9 XY- Amplifier, YF- Amplifier,

20、 OS- Circuit Subject to change without notice 10 XY Board (Top side) Subject to change without notice 11 XY Board (Top side) Subject to change without notice 12 Sync.- Amplifier Subject to change without notice 13 Time base Subject to change without notice 14 Sweep- Generator Subject to change witho

21、ut notice 15 TB Board Subject to change without notice 16 CRT- Board Subject to change without notice 17 CRT Board (Top and Bottom side) Subject to change without notice 18 Power Supply (PS-Board) A B C D 87654321 D C B A 12345678 Title :Rev.: R Date : Document Number : MPT MPT MPT MPT MPT MPT MPT M

22、PT MPT MPT MPT MPT MPT MPT MPT MPT MPT 8 1 2 3 4 5 6 7 8 9 10 11 12 13 16 15 14 17 DR1001 ETD39/303 P1001 Power Recept. S1001 NT R1001 NTC 8 C1006 2200p Y 250V U R1005 S14K275 C1003 0.33u X2 250V 14 32 L1001 2x33mH 1A C1002 0.1u X2 250V R1019 1K00 R1030 681R R1020 75K D1007 BZV55B16 C1001 4700p Y 25

23、0V + C1011 68u 400V + C1025 68u 400V F1001 0.5AF R1037 8K25 R1031 200K 1 2 4 6 5 IC1001 CNY17-2Z R1068 1K3 R1065 1K3 C1027 220p 400V R1018 100K 411 R1060 4K99 6 3 2 8 5 1 4 7 IC1003 C1041 0.1u 50V + C1020 220u 16V R1045 10K0 C1012 1n 250V R1039 200R R1032 5K11 R1026 47K5 R1033 1K82 R1008 1K0 23 D101

24、1 BAS20 D1017 BYD37M R1017 100K 411 1 32 T1003 STHV82FI ISOWATT 218 R1013 R207 200K R1021 75K C1005 2200p Y 250V 3 21 IC1002 TL431C TO-92A C1021 100p 2kV D1022 BYD77G D1019 BYD77G R1010 R207 90R9 D1027BYD37M + C1026 330u 25V + C1029 1000u 16V + C1023 1000u 16V + C1022 330u 25V C1033 0.1u 400V MKT L1

25、005 68uH 1.5A L1004 68uH 1.5A L1003 220uH 1A C1035 10n 400V MKT D1025DD1400 D1024DD1400 D1016DD1400 1 2 3 4 5 6 P1010 WIRE6 + C1009 100u 35V D1014BYD37M D1012BYT01-400 + C1015 100u 16V R1035 22R R1015 0R222W 2 3 1 T1011 BC850c SOT-23 1 2 3 T1009 BC860 SOT-23 c C1044 1n 50V R1059 1K00 R1047 22K1 4 2

26、1 3 D1001 FL406 + C1030 10u 250V + C1017 1u 50V + C1028 22u 160V D1026BYD37M 3 21 T1004 TO-126 BD434 2 3 1 T1012 BC850 SOT-23 c R1062 619R + C1032 100u 16V R1053 619R 1 2 3 T1008 BC860 SOT-23 c 3 21 T1002 BD433 TO-126 C1042 1n 50V R1061 10K0 R1056 10K0+ C1034 100u 16V R1054 3K01 - + 3 2 1 IC1004A TL

27、082CNR1055 511R R1043 7K50 C1045 0.1u 50V C1046 0.1u 50V 2 31 T1006 BF822 R1024 1M00 R1011 10M0 VR37 R1034 1M00 R1027 0R0 R1023 750K C1004 47n 2kV D1010 BZV55C75 R1067 1K00 R1057 4K32 2 31 T1007 BF822 SOT-23 R1012 6M81 VR37 R1064 47K5 R1044 475K R1041 475K R1040 10K0 R1006 470K R1007 1M00 1 2 3 T100

28、5 BC860 SOT-23 c C1018 10n 400V C1024 68p 3KV C1007 10n 400V C1010 0.1u 100V R1004 470K R1003 470K C1043 10n 50V R1069 8K25 1 2 3 4 5 6 P1003 WIRE6 R1028 1M00 D1005 LL4151 D1018 LL4151 R1058 750K R1046 22K1 1 2 3 4 5 6 P1005 WIRE6 B1003 1 2 3 4 5 6 P1002 MOLEX6S R1002 332K VR37 +Vcc -Vcc 4 8 IC1004C

29、 TL082CN C1019 10n 2kV R1025 27k4 R1014 0R39 2 31 T1010 BC850 SOT-23 c R1052 511R R105112K1 D1015 LL4151 - + 5 6 7 IC1004B TL082CN R1063 2k21 3 21 IC1005 TL431C TO-92A R1071 1K0 R1072 3K32 R1016 1K0 R1070 1K00 D1023 LL4151 R1066 7K50 R1029 1M00 R1009 R207 90R9 B1007 D1013 LL4151 D1020BYD37M D1021BYD

30、37M 1 2 3 4 5 6 P1008 WIRE6 B1008 B1009 B1011 1 2 3 4 5 6 P1009 WIRE6 L1006 68uH 1.5A C1016 0.1u 100V 1 2 3 5 4 6 7 8 9 10 B1010 D1009 BYD37M D1004 BYV27-100 D1003BYV27-100 R1022 1K82 R1036 750K R1042 750K B1013 + C1031 22u 160V L1007 68uH 1.5A + C1036 10u 250V C1037 0.1u 250V MKT 13 14 15 16 17 18

31、19 20 21 C1040 0.1u 50V R1038 0R0 C1039 4n7 50V D1006 LL4151 R1050 332K R1048 301K R1049 56K2 1 3 2 T1001 BUX86 TO-126 B1001 R1073 R207 1K0 R1074 75K + C1038 1u 50V LINE +185V +141V 31V +12V -12V +12V G1 LINE +12V -12V G1 -13.5V +13.5V 12.9V 0.4V +13.5V -13.5V HVC +12V -12V +141V +185V -12V +12V 6.3

32、V FOKUS HT14 -1950V -1950V +12V BLV BLV HT1 HT14 -2025V HT1 Subject to change without notice 19 PS-Board (Top side) Subject to change without notice 20 PS Board (Bottom side) Subject to change without notice 21 Component tester, Calibrator Subject to change without notice 22 CCT Board (Top and Botto

33、m side) Subject to change without notice 23 Front- control board Subject to change without notice 24 Front Control board (Top and Bottomside) Subject to change without notice 25 Adjustment Procedure Subject to change without notice 26 ADJUSTMENT PROCEDURE 30MHz Standard Oscilloscope HM303-4 WARNING

34、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 2,000 Volts is present inside this Instrument. The areas particularly affected by High Voltage are the high voltage circuit on t

35、he PS-board, the CRT-board and the CRT- socket. SERVICE AND ADJUSTMENT of this instrument should only be performed in accordance and in conjunction with the operating manual and the WARNINGS contained therein. should only be performed by suitable qualified and experienced service personnel, or shoul

36、d be referred to one of the HAMEG companies listed on the rear cover of the manual. Test Instruments required: 1)Scope Tester HZ60-2. 2)Constant amplitude sinewave generator, 20Hz - 250MHz, output 5mV - 5V into 50, preferably with 20dB attenuation (e.g. HM8133, TEK SG502 + TEK SG503). 3)Amplitude Ca

37、librator with 1kHz squarewave output and 600 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 (e.g. HZ62, TEK TG501). 5)Pre-attenuator

38、2:1 (1M , 12-48pF), e.g. HZ20. 6)50 BNC through termination, e.g. HZ22. 7)2 BNC-cables, 50, e.g. HZ34. 8)BNC-T-connector. 9)Oscilloscope probe 10:1, with exactly 9M series resistance and compensated for test oscilloscope mentioned under 10). 10) Oscilloscope 100MHz, 5mV/div to 5V/div, e.g. HM1005. 1

39、1) Trimming/adjusting tool. 12) Variable output safety insulation transformer. 13) Video signal generator with positive and negative signal output. 14) Yt-EPROM HM1007. This procedure covers all adjustments and the most important - but not all - performance checks. The correct sequence of all adjust

40、ment 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 fo

41、r adjustments in the high voltage section of the instrument. Subject to change without notice 27 Table of Contents (1)R1008: +141 Volt supply. 29 (2)R1016: +12 Volt supply. 29 (3)VR7000: Trace Rotation Check. . 29 (4)R1004 : CRT minimum intensity. 29 (5)R712RT maximum intensity. 29 (6)R712: Mean Y-p

42、late Potential Channel I. . 29 (7)R714: Mean Y-plate Potential Channel II. . 29 (8)RV6021 : Astigmatism correction. 31 (9)R640: Y-Gain CH I. . 31 (10)R122: FET operating point CH I. 31 (11)R203: Invert-Balance CH I. . 31 (12)R177: Variable-Balance CH I. . 31 (13)R139: 100Hz Squarewave 5mV/div CH I. 32 (14)R134: 100Hz Squarewave 1mV/div Adjustment CH I. . 33 (15)R658: Y-Gain CH II. 33 (16)R422: FET operating point CH II. 33 (17)R503: Invert-Balance CH II. . 33 (18)R477: Variable-Balance CH II. . 33 (19)R439: 100Hz Squarewave 5mV/div CH II.