Hameg HM1004, Service Manual

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43
Subject to change without notice
Table of Contents
Basic settings ............................................................................................................ 43
2) R1066: +12 Volt supply. ......................................................................................... 45
3) VR8003: Trace Rotation Check. ............................................................................. 45
4) R6013: CRT minimum intensity. ............................................................................ 45
5) R6024: Astigmatism correction. ............................................................................ 45
6) VR9009: Y-Final Amplifier Balance. ........................................................................ 45
7) R7004: Mean Readout Y-Plate Potential. .............................................................. 47
8) R5015: Auto Focus correction. .............................................................................. 47
9) R2001: 10Hz Squarewave 5mV/div CH I. .............................................................. 47
10) R2002: 10Hz Squarewave 1mV/div Adjustment CH I. ........................................ 47
11) R2005: 10Hz Squarewave 5mV/div CH II. ........................................................... 47
12) R2006: 10Hz Squarewave 1mV/div CH II. ........................................................... 47
13) R9001 (A),C9001 (B),R9004 (C),C9014 (D),R9010 (E): Y-Final Amplifier
C3061 (F),C3100 (G),C3049 (H): Main-Board ........................................................ 49
14) Y-Amplifier Bandwidth Check. ............................................................................. 49
15) C2004, C2005, C2010, C2011: Attenuator Compensation CH I. ......................... 49
16) C2060, C2061, C2066, C2067: Attenuator Compensation CH II. ........................ 49
17) Calibration Menue. ............................................................................................... 51
18) CH I Amplifier ...................................................................................................... 51
19) CH II Amplifier. .................................................................................................... 51
20) Trigger Amplifier. .................................................................................................. 51
21) R4481: A-Sweep Start Position. .......................................................................... 51
22) R4430: B-Sweep Start Position. .......................................................................... 51
23) R4841: X-Gain x1. ................................................................................................ 51
24) A-Time Base Adjustment. .................................................................................... 51
25) B-Time Base Adjustment. .................................................................................... 53
26) R4840: X-Magnification 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 VAR. (TB-A) calibrated detent (A: 100ns)
NORM (trigger) off (NM LED dark)
TRIG. (coupling) AC (readout TR:...)
TRIG. LEVEL electrical center position (triggerpoint symbol in trace position)
TRIG. (SLOPE) rising slope symbol (readout TR:...)
HOLD OFF minimum (HO LED dark)
XY off (XY not displayed in the readout)
X-POS. electrical center position
X-MAG. x10 off (X-MAG. x10 LED dark)
ALT/B Timebase off (B time coefficient not displayed in the readout)
Y-Section:
CH I on, 5mV/div, calibrated, DC input coupling (readout CH1:5mV=)
CH II off (deflection coefficient and input coupling not displayed in the readout)
INV CH I & II off (both INV LEDs dark)
Y-POS I & II electrical center position
EXTern (trigger) off (TR: EXT... not displayed in the readout)
CAL.-Section
CALIBRATOR 1 kHz
If different settings are required, they are mentioned particularly for each subject.