TROUBLE
Exposure times getting very
long.
Lamp does not light, and the
integrator reads “AOP”. The
vacuum does not go higher
than 15” of mercury.
Only slight vacuum is
registered on gauge.
Vacuum gauge reads full
vacuum, but frame lacks
contact pressure.
Vacuum pump does not run.
PROBABLE CAUSE
1) Lamp near end of life
2) Dirty reflecter.
3) Low line voltage
1) Vacuum blanket not
adjusted properly (blanket
has taken a set)
2) Leak in vacuum blanket
(holes or cuts)
3) Defective vacuum sensor on
digital PC boards
1) Vacuum valve open
2) Blanket not properly
adjusted
3) Bad seal on rubber blanket
4) Leak in vacuum hose
5) Defective pump
1) Clogged vacuum hose line
.
2) Plugged air filter
1) Defective switch
2) Defective or blown fuse(s)
3) Defective pump
REMEDY
1) Replace lamp with correct lamp.
2) Clean reflector.
3) Check line voltage as before.
1) Readjust blanket following
procedure in manual.
2) Replace blanket.
3) Replace digital board.
1) Make sure vacuum regulator knob
is fully closed. (clockwise)
2) Readjust blanket following
procedure in manual.
3) Wet surface of bead and check for
leaks while vacuum draws down.
If seal has leaks, replace blanket.
4) Check all hose fitting for leaks.
Replace if necessary.
5) Check vacuum at pump. Replace
if pump cannot pull vacuum.
1) Place finger over hole in blanket
while vacuum pump runs. If
vacuum pull is weak, clean or
replace hoses.
2) Change filter.
1) Check continuity of vacuum
switch. Replace if defective.
2) Replace fuse(s) with proper value.
3) Replace pump
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