Pro Plus ZK-1800.1D amplifier not working?? - diyAudio
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Old 17th February 2012, 03:35 PM   #1
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Default Pro Plus ZK-1800.1D amplifier not working??

hi guys,
I had this amp running a while back and i really need to get it working.
I let a friend borrow it and he returned it not working.

no lights nothing...looked inside and no signs of anything burned up but im no expert.

ive included pics below of the board if anyone could help me out with finding out the problem, it will be highly appreciated

Model ZK-1800.1D
RMS power @ 1 ohm 1800 watts
RMS power @ 2 ohm 1050 watts
RMS power @ 4 ohm 750 watts
Frequency response 35 - 120 hz
Input sensitivity 0.24 6V
Input impedance 20K Ohm
Signal to noise ratio > 100dB
Low pass crossover 35 - 300 Hz
Subsonic Filter 10 - 60 Hz
Bass boost @ 45 Hz 0 / + 18 dB.
Dimensions (W x H x L) Inches 10.24 x 2.15 x 18.5

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Old 17th February 2012, 04:13 PM   #2
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Join Date: Nov 2003
Location: Louisiana
Did you pull the fuses to check them?

I'm assuming that they were in the amp when you checked it.
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Old 17th February 2012, 04:58 PM   #3
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hi, thanks for the quick reply.

yes checked the fuses, they are fine.
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Old 17th February 2012, 05:18 PM   #4
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Location: Louisiana
Post the DC voltage on all pins of the TL494. Copy and paste this into your post.Clamp all transistors tightly to the heatsink and install a single 15 amp fuse.

IC#
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
Pin 15:
Pin 16:
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Old 17th February 2012, 05:34 PM   #5
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Just to be sure...you want the amp wired up with no speaker connected and a 15amp fuse installed. Then id use the red pin on the meter on each pin and the black pin on ground all the time??
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Old 17th February 2012, 05:54 PM   #6
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Location: Louisiana
Yes but with all transistors tightly clamped to the heatsink.
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Old 17th February 2012, 06:10 PM   #7
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Where is the TL494?
Must be blind..im sorry
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Old 17th February 2012, 06:25 PM   #8
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Where is the TL494?
Must be blind..im sorry
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Old 18th February 2012, 01:37 AM   #9
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The 16 pin IC in the power supply
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