AEC IST5 Series, Service Manual

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34) The signal should be seen in the number 8 of the U3 integration. (against GND) (See
Picture 2)
35) The signal should be seen in the number 2 of Q13 transistor as above.(against GND) (See
Picture 3)
36) The signals should be measured in the order of J27 and J26. Pin 1 of sockets are negative(-)
and pin 2 of sockets are positive. Probes of the oscilloscope should be polarized according
to this statement. (See Picture 4)
37) Thyristor J33 and J32 connection points should be connected the board before the test.
38) Adjusted PWM as in the second article is applied to number 10 of J38 socket by function
generator.
39) D28 LED is ON after these steps.
40) The signal should be seen in the number 10 of the U3 integration. (against GND) (See
Picture 2)
41) The signal should be seen in the number 2 of Q16 transistor as above.(against GND) (See
Picture 3)
42) The signals should be measured in the order of J33 and J32. Pin 1 of sockets are negative(-)
and pin 2 of sockets are positive. Probes of the oscilloscope should be polarized according
to this statement. (See Picture 4)
43) Once all the procedures are completed, the board should be inspected by thermal camera
and check if there is any anormal
44) Two way current flow should be performed by current sensors. Before starting the test,
the pin 1 of input socket should be connected by +15V and pin 3 is connected to -15V and
pin 4 is connected to GND.
After completing the test by running all the functions, the board should be labeled and stored in
available conditions.