Sony KDL-40SL140 Training Manual page 23

~1Vpp
500mV per div. 2.5ms per div.
Normal Balancer Output Waveform at
Lamp Connector
~1.5Vpp
500mV per div. 5ms per div.
Open Lamp HV Waveform at Lamp
Connector
BALANCER BOARD TEST
POINTS
FIGURE 4-2
CTV-51
Example Area for Balancer Output
Individual Lamp Connectors
Place a DMM probe
(set to AC Volts) over any one
of the positions indicated by the
yellow stars to measure
approximately 3VAC for a good
Balancer output .
OR
Place an Oscilloscope
probe over any one of
the positions indicated
by the yellow stars to
see the waveforms
below
HV1
HV2
500mV per div.
HV1 & HV2 Waveform
Balancer
Board
12V
200mV per div.
FB
LD
LD - 11V normal operaston
Troubleshooting
~1.5Vpp
2.5ms per div.
~500mVpp
2.5ms per div.
FB Waveform
22