Clarion DXZ845MC: CD plays but no sound & Radio noise at Zero Vol.

[heeengky]

Dear Expert,

I installed the head unit myself few days ago. I am replacing original/factory Becker head Unit with Clarion DXZ845MC. System uses no external Amp or other external stuff (so just head unit and speakers). Everything (almost) seems fine except:

1. CD plays but no sound coming out of speakers. Dead silent.

2. It rips CD fine (I think), but again, no sound when I play it back. Dead silent.

3. Radio works, but there’s constant audible noise even at zero volume or mute. There’s no noise in CD/MP3 function. I am just wondering if this is normal for Clarion head unit.

I called Clarion, they suspected mis-wiring. Here’s how I wired the unit: (Left Column is Signal name I got from Original Becker Head Unit manual; on the right is Clarion’s)

1. Speed Dependent Vol Control -> No Connect

2. Phone Mute -> Phone mute lead (brown wire)

3. Constant 12V -> Memory back-up lead (15A) and Bus power lead (3A) both yellow wires.

4. Ant Trig (12V when radio on) -> Auto antenna lead (Blue wire)

5. Illumination -> Illumination lead (orange/white wire)

6. Ignition -> Power lead (Red wire) no fuse attached to it.

7. Ground -> Ground lead (Black wire)

And then there’s “Amplifier turn-on lead” (blue/white wire) that is left disconnected. Antenna wire is connected using VW female to Motorola male adapter. I believe I connect the speaker connections correctly.

I am wondering if I should make extra ground connection to ground the unit chassis to reduce this radio noise.

Please help. Any comment/advice is truly appreciated.

Thanks!!

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[johnecon2001 5,000+ posts]

Possible you have a bad HU. Or that model deck has no internal amp. you should check with the manufacturer, and your user manual.

 

[heeengky]

Problem fixed. Turns out I need to tie car's "Ant Trig (12V when radio on)" to Clarion's "remote amp-on(blue/white)" instead of "Auto antenna lead (Blue wire). I just learned that my car has factory amp hidden somewhere.

As for the noise... it's still there. They say it's normal, but that kind of s*cks.

 

[Scarenius 10+ year member]

It could be alternator whine. Give your HU a better ground, and see if that helps.

Or, it could also be the stock amp(s). Try the HU ground, first.