MODEL 5600 REPAIR & CALIBRATION MANUAL CAT# 1431.01
9
REVISION 7: June 11, 1999
FILE LOCATION: E.F. Disk - Manuals - Cal. Man. - Model 5600.DOC
10/27/99
BOARD MAINTENANCE AND REPAIR
1) Main Board – Operating Description:
a) ON-OFF
S1 switches ON or OFF.
At point (3) behind anti-bouncing Circuit) there is level 0 when switch is not
pressed, and levels 1 when switch is pressed.
Circuit Z5 is a dual D Flip Flop, its output (Q) takes in account the state of
input D (5) for each positive going clock pulse (3).
D input is connected with output Q, this means that Q changes (as well as Q)
at each positive going clock pulse; i.e. each time S1 is pressed.
Outputs Q and Q trigger opening and closing coils of the residual bi-stable
relay K1.
7
6
5
4
3
2
1
START
STOP
+ Batt
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