How To Repair The Cyclops
- #ane
And so have this cyclops. At showtime it was constantly going into protect. In that location was a wink of DC on the output terminals as it would protect. While in protect I got the following measurements:
KA7500BD Pin ane: v.78
Pin 2: 2.546
Pin 3: four.68
Pin 4: 3.983
Pivot 5: 1.575
Pin half-dozen: 3.676
Pin 7: 0.00
Pin 8: 12.16
Pin 9: 0.000
Pivot 10: 0.000
Pin 11: 12.16
Pin 12: 12.xvi
Pin 13: 4.97
Pin fourteen: 4.97
Pin xv: 4.97
Pin 16: 0.000
Pin i: 6.37
Pin two: 2.483
Pin 3: around 4v
Pin 4: 0.000
Pin five: 1.025
Pivot vi: 2.944
Pin seven: 0.116
Pin 8: 12.xv
Notation nearly pivot 3 on LM: It started out around 4v again similar the AQ if I held the lead on the pin long enough information technology would somewhen "drain" to beneath 2v and plough off the protection and then relays would click on then voltage jumps support and become back into protect and turn relays off again.
So subsequently trying this a few times to become readings, I got it to stay out of protect. Using the current limiter. So I rechecked voltages at various locations heres what I have.
KA7500BD -------- -----------------------LM293D Pin 1: 0.004 -----Pin sixteen: 0.003 ------- Pin ane: 0.070
Pivot 2: 2.163 -----Pin xv: four.470 -------Pin ii: 2.271
Pin 3: 0.075 -----Pin 14: four.470 -------Pin iii: ane.800
Pin iv: 0.075 -----Pin 13: 4.470 -------Pin iv: 0.003
Pin five: one.372 ---- Pivot 12: five.45 ---------Pivot v: 0.945
Pin 6: iii.103 -----Pin xi: 5.45 ---------Pin 6: 2.710
Pin seven: 0.003 -----Pin x: 1.785 ---- ---Pin 7: 0.070
Pin eight: 5.420 -----Pin 9: 1.782 ----- --- Pin 8: five.46
IRFP064N: Leg i: i.6v ......Leg 2: 8.2v ................................Leg iii: 0.000v
Rectifiers: Leg 1: 68.5v ......Leg 2: pulses display of dmm .. Leg 3: 68.7v
IFRP360LC: Leg one: 50v .....Leg 2: 68.5v ..............................Leg three: 51v
I have the post-obit readings on the output bulldoze bill of fare pins:
Pin i: -51.0v ...............Pivot 8: 1.846 .............Pin 15: -68.vi
Pin 2: -51.2v .............. Pin ix: 5.03 .............. Pivot 16: -68.2
Pivot 3: -68.5v .............. Pin 10: -five.42 ...........Pin 17: -68.6
Pin 4: -58.7v ...............Pivot 11: 0.000 ..........Pivot eighteen: -58.7
Pivot 5: -68.6v ...............Pin 12: -5.10 ..........Pin nineteen: -68.6
Pin 6: -68.1v ...............Pin 13: 5.00 ...........Pin twenty: -51.4
Pin seven: -68.6v ...............Pin 14: viii.73 ...........Pin 21: -51.iii
...and there is over 40vdc on the output speaker terminals when relays are engaged.
Now after leaving my resistor cool, and recharging my battery. I can't go it to stay out of protect again. Back to point one.
This pic shows a spot on the PS driver card thats not looking too skillful or was repaired before and not cleaned up well.
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IMG_0366.JPG
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- #vii
Should I be driving a signal into information technology for this test?
I'm not sure if there is or not... Equally presently as I touch the ruby prob to either pin the trace darts up off the screen. even if I fix it to 50v/div. I tried black on both the center tap and batt ground concluding.
With the power applied (no remote) the DMM shows 0.040v on pins 1 & 3 and pin 2 every bit a slowly draining rail. Almost downwards to i.5v now....
With remote applied using DMM I accept -58.9v on pins ane & iii and 66.8v on pin 2. of 2 banks and -66.4v on pins i&iii and -60v on pin 2 of the other 2 banks.
My settings:
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IMG_0367.jpg
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- #11
It is turning on everytime without clicking back off at present, no protection lights, but no oscillation and 60v dc on output terminals. It pulling about 3.0amps with the limiter in place
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- #xiii
thats what I meant... 60vdc in the speaker terminals... it might have been that high from the first
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- #19
I don't encounter any broken legs and they all exam OK in the circuit. I haven't removed them to examination... there are no shorts and they all pretty much read the same.
I have the following voltages on the output driver card pins.
1: -60v
2: -60v
3: -64v
4: -54.6v
5: -63.7v
6: -63.1
7: -63.5
8: 1.335
nine: v.03
ten: -5.31
11: 0.000
12: -5.10
thirteen: v.0
14: vii.267
fifteen: -63.five
16: -63.1
17: -63.5
18: -54.iv
19: -63.6
twenty: -lx.1
21: -60.2
Should I pull it out of the case and remove the outputs and test out of the circuit?
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Source: https://www.diyaudio.com/forums/car-audio/228771-hifonics-xxv-cyclops-repair.html
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