Hameg HM303-6, Service Manual

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50
Subject to change without notice
19 P2016: Channel II Y-MAG. x5 balance
– Press CH I/II pushbutton (IN position) to select channel II.
– Locate and identify P2016 on YP-Board.
– Set input attenuator CH II to 5 mV/div.
– Press channel II GND pushbutton (IN position).
– Set input coupling to DC.
– Set trace with Y-POS II control to the horizontal centre line
of the graticule.
– Press and release the CHII Y MAG x5 pushbutton and adjust
P2016 for no trace movement.
x1 (active) x5 incorrect x1 x5 (active) incorrect x1 (active) x5 correct x1 x5 (active) correct
20 P2014: 100 Hz square wave CH II
– Press CH I/II pushbutton (IN position) to select channel II.
– Locate and identify P2014 on YP-Board.
– Connect a 25 mV
pp
/ 100 Hz square wave signal via a 50 Ω
cable and a 50 Ω through-terminator to input channel II.
– Set input attenuator CH II to 5 mV/div.
– Set input coupling to DC.
– Set time base to 2 ms/div.
– Adjust P2014 for a fl at top on the square wave signal.
Correct overcompensate undercompensate
P2008
P2011 P2012
P2006
P2007
P2005 P2002
P2001
C2007
C2010
C2009
C2011
P2003
C2107
C2108
C2103
C2110
P2016
P2014
P2015
P2010
P2009
YP-Board
P2008
P2011 P2012
P2006 P2007 P2005 P2002
P2001
C2007
C2010
C2009
C2011
P2003
C2107
C2108
C2103
C2110
P2016
P2014
P2015
P2010
P2009
YP-Board
A d j u s t m e n t P r o c e d e r e H M 3 0 3 - 6