40
P5000S/P7000S
6.4
Repair concrete instance at the trouble part
Check the following instruction.
q
Confirm the resistor value of R416, R451(6.8
Ω
5 W).
Exchange if open the resistor value.
w
Confirm the resistor value of Q406, Q407 Between C-E.
If short or several value(
Ω
), remove the part and then exchange IC402 because it is broken.
e
Conform the resistor value of R420, R421.
Confirm whether or not it is a 10
Ω
.
Remove if open or a resistor value is increased.
r
Conform the resistor value of R419.
Confirm whether or not it is a 4.7
Ω
.
Remove if open or a resistor value is increased.
t
Conform the resistor value of R429, R430.
Remove if open or a resistor value is increased.
y
Confirmation of F401.
Confirm the resistor value of F401.
Don't install the test of
u
ends.
u
Conform a waveform of IC402.
Confirm alternating volts.
【
Note
】
The earth of the measuring machine doesn't connect.
The parts sometimes damages when using in the connecting condition.
After
q
-
u
ending, it observes a waveform IC402-1Pin(Lo),2Pin(COM) with the oscilloscope.
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 (regulator) 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
w
, you exchange IC401).
* When observing a waveform, do short-circuiting of PR401.
i
Exchange the parts which was removed by
q
-
u
for the normal part.
o
It is repair completion if confirming "6-2. Electric performance" and not being in the problem.
All secondary output isn't output.
