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3P5000S / P7000S
4 Repair concrete instance at the trouble part
All secondary output isn't output. Check the following instruction.
Æ’ Confirm the resistor value of R416, R451(6.8 -„¦ 5 W).
Exchange if open the resistor value.
-ž Confirm the resistor value of Q406, Q407 Between C-E.
If short or several value( -„¦), remove the part and then exchange IC402 because it is broken.
-¦ Conform the resistor value of R420, R421.
Confirm whether or not it is a 10 -„¦.
Remove if open or a resistor value is increased.
- Conform the resistor value of R419.
Confirm whether or not it is a 4.7 -„¦.
Remove if open or a resistor value is increased.
-¡ Conform the resistor value of R429, R430.
Remove if open or a resistor value is increased.
ˆ Confirmation of F401.
Confirm the resistor value of F401.
Don't install the test of -° ends.
-° Conform a waveform of IC402.
Confirm alternating volts.
² Note ³
The earth of the measuring machine doesn't connect.
The parts sometimes damages when using in the connecting condition.
After Æ’ - -° ending, it observes a waveform IC402-1Pin(Lo),2Pin(COM) with the os\
cilloscope.
There is good if being the square wave (0-15V) of the about 70 kHz.
In the waveform malfunction case, confirm that the output of IC403 (reg\
ulator) is +15 V.
In case of equal to or less than 15V, it exchanges IC402 and it observes a waveform once again.
(When exchanging IC402 already by -ž, you exchange IC401).
When observing a waveform, do short-circuiting of PR401.
Å Exchange the parts which was removed by Æ’ - -° for the normal part.
-¹ It is repair completion if confirming "6-2. Electric performance" and n\
ot being in the problem.