45
Service Manual
5-12
• Meter with Battery Option
Line Operation: 54 mV
Battery Operation: 43 mV
• Meter with IEEE-488 Interface and Battery Options
Line Operation: 85 mV
Battery Operation: 43 mV
HEAVY LOAD ON 5V SUPPLY5V SUPPLY OUTPUT SHORTED
NORMAL LOAD ON 5V SUPPLY NO LOAD OR VERY LIGHT LOAD ON 5V SUPPLY
5V
5 sm
5V
5 sm
5V
5 s
5V
m
5 sm
qb23f.eps
Figure 5-2. Volt Switching Supply
5-8. Inverter
Use an oscilloscope to troubleshoot the inverter. Check for a 9.6 V p-p signal (with a
period of approximately 30 to 40 µs) across the primary winding of the inverter
transformer (A1T2). If this signal is measured with reference to ground, the amplitude of
the square wave should be approximately 4.8 V p-p.
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