Service manual

GE MEDICAL SYSTEMS
D
IRECTION 2300749-100, REVISION 2LOGIQ
TM
3 SERVICE MANUAL
Chapter 6 6-3
6-3-2 Adjustments Procedures
1.) Using the following VR’s, DC output can be adjusted
NOTE: Using DMM Check if the voltage settings are within spec, if not do adjustment as per table below.
NOTE: Voltages can also be measured on test points provided in PCB Assembly by removing nest EMI
Table 6-2 DC Output Specification for LV Unit
VR
Specifications PCB Name Test Point
VR1
3.3V +/- 34mV TXB 3.3VD
VR2
5V +/- 100mV TXB +5VD
VR3
5V +/- 100mV RXB +5VA
VR4
-5 V +/- 100mV RXB N5VA
VR5
12V +/- 120mV TXB +12VA
VR6
-12V +/- 120mV (non adjustable) TXB N12VA
Figure 6-2 VR’s for Adjusting DC Output
+S -S
+5V A
+12V A
-5V A
GND
GND
GND
+3.3VD
+5V D
GND
GND
6
5
4
3
2
1 +5V A
+12V A
-5V A
GND
GND
GND
4
3
2
1
+3.3VD
+5V D
GND
GND
Black
Blue
Black
Orange
Black
Red
Black
Red
Black
Brown
6
5
4
3
2
1 +5V A
+12V A
-5V A
GND
GND
GND
4
3
2
1
+3.3VD
+5V D
GND
GND
Black
Blue
Black
Orange
Black
Red
Black
Red
Black
Brown
VR1
VR2
VR3
VR4
VR5
Test Points on the
Transmit Board
Test Points on the
Recieve Board