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Teledyne API - Model T200H/T200M Operation Manual
Troubleshooting & Service
243
7.5.5. DC POWER SUPPLY TEST POINTS
Table 7-6: DC Power Test Point and Wiring Color Code
NAME
TEST POINT#
COLOR
DEFINITION
DGND
1
Black
Digital ground
+5V
2
Red
AGND
3
Green
Analog ground
+15V
4
Blue
-15V
5
Yellow
+12R
6
Purple
12 V return (ground) line
+12V
7
Orange
Table 7-7: DC Power Supply Acceptable Levels
POWER
SUPPLY
VOLTAGE
CHECK
RELAY
BOARD TEST POINTS
MIN V
MAX V
FROM
Test Point
TO
Test Point
NAME
#
NAME
#
PS1
+5
DGND
1
+5
2
+4.80
+5.25
PS1
+15
AGND
3
+15
4
+13.5
+16.0
PS1
-15
AGND
3
-15V
5
-14.0
-16.0
PS1
AGND
AGND
3
DGND
1
-0.05
+0.05
PS1
Chassis
DGND
1
Chassis
N/A
-0.05
+0.05
PS2
+12
+12V Ret
6
+12V
7
+11.8
+12.5
PS2
DGND
+12V Ret
6
DGND
1
-0.05
+0.05
The test points are located at the top, right-hand corner of the PCA (see Figure 7-4)
7.5.6. I
2
C BUS
Operation of the I
2
C bus can be verified by observing the behavior of D1 on the relay
PCA & D2 on the Valve Driver PCA . Assuming that the DC power supplies are
operating properly, the I
2
C bus is operating properly if: D1 on the relay PCA and D2 of
the Valve Driver PCA are flashing
There is a problem with the I
2
C bus if both D1 on the relay PCA and D2 of the Valve
Driver PCA are ON/OFF constantly.
07270D DCN7141