7
Troubleshooting analysis 3──cylinder’s lifting problem
Figure 22 circles number testing in
cylinder is broken, the circles testing
board is broken caused the single
board cannot receiving signal on PC
board then cannot enter to next step.
Change the hall tube on cylinder testing
board or change the whole
cylinder
Power on, the backrest lay down, calf
rest cylinder rise up and stop testing,
don’t enter to auto massage
program. But the manual program is
ok, without auto stretch function
Cylinder’s lifting problem
Pic 19 cylinder driving circuit diagram
Cylinder throw over relay 212L
Audion 8050
Control DC 110 V power
optocoupler 817
Control DC 110 V field
effect tube 13N50C
Use replace method to
check the problem caused
by cylinder or PC board
──
with the normal cylinder to
driving the abnormal
cylinder, if it can move, we
can judge the problem is
caused by the PC board, if it
cannot move, we can judge
the cylinder is broken ,
change a new one.
One cylinder cannot rise up
or down
See figure 19 and 21
,
the
relay 212L or Q8/Q9
audion 80580 was broken
Change the component
or PC board
One cylinder can only rise
up or only decline
DC 12 V power’s problem
caused the relay cannot
reversing, no matter you
press up or down, the
cylinder can only get one
direction DC 110 V power
Power board 7812 stabilivolt
was broken, change a new
component or new power
board.
The two cylinders can only
rise up or only decline
Backrest cylinder can
only rise up no matter
you press down or up
①
figure 2 the safety
switch was squeezing by
other thing
②
safety switch was
broken
,
cause the
mis-testing
Change the testing switch
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