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Old 10th September 2019, 11:04 PM   #1
rhempz01 is offline rhempz01  United States
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Default Kicker CXA600.1

Ok so again i have one of these amplifiers. i have the power supply is functioning perfectly. rail & regulated voltage is present. Just no audio?
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Old 12th September 2019, 03:04 PM   #2
PapaZBill is offline PapaZBill  United States
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Signal trace the input stage with 40hz tone to see if the signal is interrupted.

Also check the two 1 ohm 2512's near the regulators
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Old 12th September 2019, 05:52 PM   #3
PapaZBill is offline PapaZBill  United States
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Quote:
Originally Posted by PapaZBill View Post
Signal trace the input stage with 40hz tone to see if the signal is interrupted.


Ignore the following comment. This doesn't apply to the 600.1 only the 300.1

Also check the two 1 ohm 2512's near the regulators
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Old 12th September 2019, 06:01 PM   #4
PapaZBill is offline PapaZBill  United States
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JK1 the remote gain jack may have broken solder, also check R63-20.5K ohm and continuity between R63 to U4 Pin 6 and R63 to R60-499 ohm.

The muting circuit Q3-BC807 may have failed.
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Old 12th September 2019, 07:23 PM   #5
rhempz01 is offline rhempz01  United States
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i previously touched up all solder on that jack first.
the r63 is 20.50k and continuity to u4 pin 6 is good. Continuity from r60 to r63 is good as well.
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Old 12th September 2019, 07:46 PM   #6
PapaZBill is offline PapaZBill  United States
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Look at Q3 muting circuit. Post the Vdc for all three legs
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Old 13th September 2019, 12:57 AM   #7
rhempz01 is offline rhempz01  United States
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1.) 11. 36
2.) 12.20
3.) 1.896

Last edited by rhempz01; 13th September 2019 at 01:00 AM.
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Old 15th September 2019, 03:58 AM   #8
rhempz01 is offline rhempz01  United States
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Are those acceptable? Still no audio and I can't seem to find out why.
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Old 15th September 2019, 09:40 PM   #9
PapaZBill is offline PapaZBill  United States
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Look at the Vdc on either side of the following resistors-R55-0R,R78-470K,R77-200K.

Have you tried signal tracing the input between RCA's and U1 to U7?
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Old 17th September 2019, 01:28 AM   #10
rhempz01 is offline rhempz01  United States
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r55.) -11.11vdc both sides
r77.) -25.08, -11.11
r78.) 12.55, 11.43

pins 4 & 8 of u2-u7 have the 40hrz present if grounded to the rca sheild. were should i be grounded to signal trace.
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