Investigate The Type Of Noise; Power Cable Test - GE LOGIQ E9 Service Manual

D 5180483-100, R
IRECTION
7-9-3

Investigate the Type of Noise

Use the flow chart below to investigate the type of noise.
START
DISCONNECT ALL CABLES
THAT ARE NOT IN USE. (KEEP
POWER CABLE AND ACTIVE
PROBE CONNECTED.)
DOES
THE NOISE
DISAPPEAR?
DOES
THE NOISE
CHANGE?
DOES
THE NOISE CHANGE
IF YOU HOLD THE PROBE
AND AT THE SAME TIME
TOUCH THE SCANNER
GROUND?
THE NOISE IS EITHER
RECEIVED VIA THE AC
POWER CABLE OR IS
SELF GENERATED.
See:
7-9-3-1 "Power Cable
Test" on page 7-198
7-9-3-1

Power Cable Test

Use a ferrite core on the AC power cable to verify if the noise is picked up by the AC power cable.
7 - 198
PROPRIETARY TO GE
. 7
EV
Figure 7-155 Noise Type
THIS MAY INDICATE THAT THE NOISE WAS PICKED
UP BY ONE OF THE CABLES YOU DISCONNECTED.
YES
CONNECT THE CABLES AGAIN, ONE BY ONE AND
WATCH THE NOISE. IF ONE CABLE IS
RESPONSIBLE FOR ALL THE NOISE, REPLACE IT.
NO
YES
NO
YES
NO
Section 7-9 - Troubleshooting Tips
THIS MAY INDICATE THAT THE NOISE IS PICKED UP
DUE TO STRONG ELECTRIC OR MAGNETIC FIELDS
OR THAT THE GROUNDING IS FAULTY.
THIS MAY INDICATE THAT THE NOISE IS PICKED UP
DUE TO STRONG ELECTRIC OR MAGNETIC FIELDS
OR THAT THE GROUNDING IS FAULTY.
LOGIQ E9 P
ROPRIETARY
S M
ERVICE ANUAL