Non-Reproducible Failure Tests - Yamaha pw 5000 Service Manual

QQ
3 7 63 1515 0

NON-REPRODUCIBLE FAILURE TESTS

Printed circuit board, soldering,
parts mounting, foreign materials
Check output
Powe On/Off
TE
L 13942296513
Output ripple
Appearance
It attaches in a main part
(PW5000).
www
NOTE 1)
Voltage check shall be performed at the
specified point with PM 5000 main body
.
connected.
Adjustment on 48.0V CELL has been
performed already. Correct it only if any
deviation was found.
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NO
NG
voltage
OK?
YES
NO
OK?
YES
NO
Signals
OK?
YES
NO
waveform
OK?
YES
NO
check
OK?
YES
NO
Aging test
OK?
YES
Perform analysis
again
x ao
y
i
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8
Visually check inside the power unit as
＊
required
Verify normal output voltage for each
＊
circuit.
When required, the half-fixation VR is
adjusted. Note 1)
＊ Verify normal output performance by
turning on and off the AC input.
Verify normal signal transmission by turning
＊
on and off the power and the SW.
While acting as the monitor of the output
＊
Q Q
voltage waveform on an oscilloscope, the 3 6 7 1 3
test which adds vibration is performed.
Please check the change in a waveform.
Appearance check
＊
Aging examination conditions are carried
＊
out on the
consideration according to the fault
generating situation.
Adjustment on 12.0V:
Readjustment is needed when Fault CELL is
exchanged.
①Before attaching the jumper connectors,
check that the replaced CELL has output
u163
between 11 to 13 V.
②Attach the jumper connectors, and then
.
attach the short bar.
③Set the semi-fixed volume at MAX (fully
turned to the right) on the CELL 2 to 5, and
adjust the semi-fixed volume on CELL 1.
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
conditions taken
m
co
PW5000
9 9
2 8 9 9
into
5