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Section F
3.30.NO START/STOP HW
The microprocessor of the PC1 system control board is sending
the X-ray on start signals (one is a digital signal, the other one is an
analog signal) to the converter board PQ1; the sequence of signals
is the following:
(1)
Dead man (positive - analog signal)
(2)
on the serial communication channel are transferred
information about set point of kV, mA and duration of the
exposure time
(3)
X-ray start (negative - digital signal)
If the PQ1 is receiving a wrong sequence of signals, the alarm No
start/stop hw is generated.
Possible causes:
(1)
PC1 system control board defect
(2)
PQ1 converter board damaged
(3)
wiring between PQ1 (X44) and PC1 (X30) board damaged
or bad connection.
W
f I
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c
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p
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P
C
1
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E
E
P
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M
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3
8
f
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o
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a
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t -
b u
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a c
b i l
a r
o i t
n
-
, X
, Y
R
a
d n
C
m
o
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m
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s t
a t
-
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o
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-
c
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p
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-
A
E
C
a c
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o i t
n
a
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n
g i f
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C
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g i f
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n
C
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S
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W
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o
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P
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1
p
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T
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b i l
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n
a
(
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t
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a v
n
p t
a
a r
g
a r
p
s h
The alarm is captured and stored as soon as it is detected.
Press the RESET pushbutton on the control panel to cancel the
alarm (if expired).
F-12
A
R
N
N I
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d
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o
d l
b
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a
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t i t
o l l
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p
a
a r
m
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s r
w
l i
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o l
: t s
t r
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s n
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V
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A
. )
u
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e h
f n i
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a
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f
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c
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C
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A
R
N
N I
G
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e
s d
o t
b
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p
a l
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d
t ,
e h
d n
V
t f
b u
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e
d
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g n
m
s u
b t
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p
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f o
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s
c e
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f n
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m
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f n i
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3.31. RESET -X- FAILED
Every movement (X,Y, R and C) has a maximum time (about 20 s) to
reach the reset position after pressing the RESET pushbutton on
the control panel.
If the X movement does not reach its reset position in time, the
alarm is generated.
Possible causes:
(1)
X movement step motor defective
(2)
belt of the X movement step motor damaged or belt tension
incorrect
(3)
X movement blocked
(4)
X movement step motor +42V power supply is not correct
on the PC1 system control board: this power supply comes
from the PFC board PN1.
Check the power supply value on test points TP1 and TP7
(GND) on the PFC board PN1; by checking the LED H3
(ON=OK, OFF=NOT OK) on the system control board PC1;
by checking the LED V5 (ON=OK, OFF=NOT OK) on the
PFC board PN1.
Check whether fuse F2 on the PFC board PN1 has blown.
PFC board PN1 defective.
System control board PC1 defective.
(5)
wiring damaged between PC1 system control board and X
movement step motor (see principle diagram Z1-9)
b
r e
o t
(6)
X movement reset position optoswitch S15 damaged
o
t n
e h
(7)
PC1 system control board does not recognize the X
movement reset position optoswitch S15 (PC1 board
defective)
(8)
wiring damaged between optoswitch S15 and PC1 system
control board (see principle diagram Z1-10)
S
s y
e t
m
f I
h t
e
h
o
t s
c
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m
o
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t
e h
E
e n
w
o
n
, e
o
h t
t -
b u
e
a c
b i l
a r
-
, X
, Y
R
a
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e s
i v r
e c
-
a l
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g
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o
f r
r o
m
e
d
-
c
s u
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i m
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d
m
a
o i t
. ) n
-
A
E
C
a c
b i l
a r
f I
o y
u
o f
g r
t e
C
o
n
g i f
u
a r
o i t
The alarm is captured and stored as soon as it is detected.
Press the RESET pushbutton on the control panel to cancel the
alarm.
(03.0)E
ORTHORALIX 9200
W
A
R
N
N I
G
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m
p
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r e
P
C
1
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e
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E
P
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3
8
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C
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p
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DENTSPLY Gendex
Service Manual
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