FE ZAJ, Руководство по обслуживанию

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TN512955-E
9
5-1. Check of voltage across printed circuit board
Check of power supply voltage

CPU board
J6 (GND) – J5 (+5V) ·············· +5.0

0.3V

A/D board
J13 (GND) – ··································· J11 (+15V) +15.0

0.5V
J13 (GND) – ···································· J12 (-15V) -15.0

0.5V
J13 (GND) – ···································· J14 (-12V) -12.0

0.5V
J13 (GND) – ····································· J15 (+5V) +5.0

0.5V

Output board
CN1 11 pin (Vss) – CN1 - 10 (+5V) ························ +5.0

0.3V
CN5 2 pin (VG) – CN5 - 1 (+15V) ······················ +15.0

0.5V
CN5 2 pin (VG) – CN5 - 3 (-15V) ························ -15.0

0.5
5-2. Check of magnet driven pulse

Check the pulse between terminals at the lower part of the sensor using an oscilloscope.
Pulse cycles depend on power frequencies:
At power frequency of 50Hz, 12.5

0.5Hz
At power frequency of 60Hz, 15.0

0.5 Hz
5-3. Check and adjustment of synchronous rectification waveforms
Synchronous rectification waveforms should be checked if they vary widely.

Check points
Use an oscilloscope to check waveforms between pin 4 of AC amplifier board Q7 and A/D board J13.
Note that the tester should be directly applied to the IC pin since pin 4 of the AC amplifier board Q7 is
not provided with a check terminal. Be careful not to short between adjacent pins.
Observe and check the waveforms according to waveform examples.
5. CHECK FOR SIGNALS
0V
30V
12.5or15Hz