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Kicker ZX1500.1 protects when driven hard
Kicker ZX1500.1 protects when driven hard
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Old 20th January 2021, 08:24 PM   #31
mbates14 is offline mbates14
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those ZR "grille" amps love to eat outputs. I've noticed that.
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Old 23rd January 2021, 12:26 AM   #32
peeby is offline peeby
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OK - low voltage is fine and have voltage on the class d card but now no output from the card. I killed it somehow.

-drv is 3.6v and +drv is 5.2v dc measured on scope. Dc no oscillation.

Any suggestions on which IC's to replace? All diodes, caps and resistors are checking ok.
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Old 23rd January 2021, 06:04 PM   #33
PapaZBill is offline PapaZBill  United States
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Look at the U202-LM361 with an Oscope Pins 3,4,9 & 11 and measure DC volts around U200,201,202 & 203. Post voltages and screenshots.

It's possible the problem is the Drive circuit underneath the card. Q100,102,OPT100,101 & U100,101.

To check this circuit you may want to modify the Class D card, so that you can stand card upright to get to the drive circuit underneath. I have done this by bending the pins by 90 degrees on one side and extending the pins on the other with ribbon cable.
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Old 24th January 2021, 03:57 AM   #34
peeby is offline peeby
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PapaZBill- what is the value of D7? Placing a parts order. Thanks
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Old 24th January 2021, 05:08 AM   #35
RussellKinder is offline RussellKinder  United States
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Quote:
Originally Posted by PapaZBill View Post
I have done this by bending the pins by 90 degrees on one side and extending the pins on the other with ribbon cable.
Don't you love designs made for repairability?
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Old 24th January 2021, 03:09 PM   #36
PapaZBill is offline PapaZBill  United States
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Quote:
Originally Posted by peeby View Post
PapaZBill- what is the value of D7? Placing a parts order. Thanks
D7-1N4148
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Old 25th January 2021, 04:10 PM   #37
PapaZBill is offline PapaZBill  United States
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Quote:
Originally Posted by RussellKinder View Post
Don't you love designs made for repairability?
--
Russell, you may know this, but Kamen Vasilev designed this amp. For the most part it's not a bad amp to work on but the drive circuit underneath the daughter board does add a challenge.
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Old 25th January 2021, 09:05 PM   #38
Perry Babin is offline Perry Babin  United States
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Re#33:
You can make male/female ribbon cable jumpers for headers with full length pins. This doesn't work for driver boards that are soldered into the boards due to the short pin length. The ones for JL amps are great time savers.
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Old 27th January 2021, 10:17 PM   #39
peeby is offline peeby
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PapaZBill - I actually have 2 of these amps. My other one the +/-12V regulator is putiing out 15V. Why would that be? Measuring +/-15 at the zeners. And will that cause problems with the IC's?
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Old 28th January 2021, 12:15 PM   #40
PapaZBill is offline PapaZBill  United States
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In later versions the +/- voltage was beefed up.
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