OEC COMPACT 7600 Series - mA - Troubleshooting Charts, p. 4, 3;97

Page 4 of 4
For Reference Only
mA GENERATION & REGULATION
3/7/97
MA.DS4
TROUBLESHOOTING CHARTS
COMPACT / SERIES 7600
UH - APROXEMENT FILAMENT VOLTAGE
MODE
Fluoro Standby (Pre-heat)
Fluoro Exposure
Fluoro Exposure
Snapshot
Snapshot
Hip
Hip
Film Mode Prep
Press hand switch quickly (less than 1 second)
2 Second Film Exposure
2 Second Film Exposure
kV
76
36
110
36
110
36
110
76
36
80
mA
0.2
3.0
8.0
8.0
0.2
5.0 - 6.0
20.0
20.0
UH FILAMENT VOLTAGE **
Filter Pcb XP1-3 or B143 Pcb X3-4
9.8vdc - 10.2vdc
10.2vdc - 10.6vdc
11.8v - 12.2vdc
14.0vdc - 15.5vdc
12.5vdc - 13.4vdc
10.2vdc - 10.6vdc
11.2vdc - 11.5vdc
14.9vdc - 15.5 vdc
16vdc than dropping to 14.3vdc - 14.8vdc
16vdc than dropping to 13.8vdc - 14.3vdc
** UH Filament Voltage Note **
>21vdc = Xray is disabled (B143 Pcb)
Fault Indicator Off
10vdc - 20vdc = good range
6vdc - 9.9vdc = low mA, Fault Indicator Off
<5vdc = No mA, Fault Indicator illuminated
(See Interface Signals Diagram
for Fault Indicator)
Chart 1
B143 Pcb TROUBLESHOOTING CHART
Approximate voltages
Use TP6 as GND
MODE
76kV Idol Fluoro (No exposure)
36kV Standard Fluoro Exposure
60kV Standard Fluoro Exposure
85kV Standard Fluoro Exposure
mA
0.0
0.2
1.7
3.0
TP2
MAIST
+0.44vdc
+0.25vdc
-1.1vdc
-2.4vdc
TP3
Offset
0.0vdc
-.103vdc
-.86vdc
-1.5vdc
TP4
Filament Regulator Control
+1.5vdc
+0.15
+0.94vdc
+1.58vdc
Chart 2
NOTES:
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