Fitting the new JVC KD-AVX2 car AV centre - questions

[Richard10002]

1st step is to identify how the power connects. There are 3 wires with the following instructions:

Black - to metallic body or chassis of car... I am assuming that this is the negative/earth lead and should be connected to the negative/earth wire from the switch bank?

Yellow - to a live terminal in the fuse block connecting to the car battery, bypassing the ignition switch, (constant 12v) - I am wondering if this is the wire which keeps the memory alive. If so, I need to find a live which is direct to the battery and not switched. The VHF and the bilge pump are direct connects, or do I need to feed a separate independent wire

Red - to an accessory terminal in the fuse block - Presumably this is the on/off wire, and goes to the live end of a fused switch on the switch bank. There is a diagram suggesting that this wire is connected to the ignition switch.

Light green - to parking break switch - the guy at halfords said to connect this to an earth, or to the aerial... this is also advised on avforums to enable DVDs to be watched whilst a car is moving.

I could be wrong on all, or any, counts, so any assistance/confirmation welcomed.

There are other wires which I dont think I need to use:

Blue with white stripe - to the remote lead of other equipment or power aerial, (200mA max)

Orange with white stripe - To car light control switch

Brown - to mobile phone system, (may look at this at a later date)

ALSO:

There is a 15A fuse in the back of the set where the power connects, but there is no suggestion of the size of fuse to use in the fuse block, (either for the red, or the yellow wires above), and no suggestion of the maximum amps drawn - any ideas how to work out what to use?

That'll do for now. I'm reasonably sure I can work out the AV and speaker stuff, (famous last words)

Many Thanks

Richard

 

[ShipsWoofy]

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Black - to metallic body or chassis of car... I am assuming that this is the negative/earth lead and should be connected to the negative/earth wire from the switch bank?

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Yes

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Yellow - to a live terminal in the fuse block connecting to the car battery, bypassing the ignition switch, (constant 12v) - I am wondering if this is the wire which keeps the memory alive.

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Yes again, though on my boats radio I just have this tied to the red +ve feed. This means retuning Radio 2 and 4 each time we arrive. When cruising we generally do not switch the power off the radio so it does not become an issue. When we move aboard I may take this to the bilge feed as you suggest. Do make sure you add a really small in-line fuse to this feed, 50mA would suffice, but I would have to look up the drain figures to make sure.

Some radios, like mine will not let you just hang the yellow wire, you have to have +12v on both yellow and red. I have my stereo on my navtex circuit as that is my 24hr switch as such.

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Light green - to parking break switch - the guy at halfords said to connect this to an earth, or to the aerial... this is also advised on avforums to enable DVDs to be watched whilst a car is moving.

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Never come across this one, I am unsure how connecting to gnd enables watching DVD on the move in a car, unless it is connected to the ignition so when it is at +12v it disables the DVD player. I would try hanging it first and see if it functions, if not, touch it to the radio chassis and see if the dvd spins up??

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Blue with white stripe - to the remote lead of other equipment or power aerial, (200mA max)

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yup, leave disconnected

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Orange with white stripe - To car light control switch

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This might be handy for night sailing, by adding a 12v rocker switch you may be able to dim / turn off the display. They can ruin your night vision, I wish mine had this. i.e. connect a switch between this wire and your 12v feed to the radio.

You could connect it to your nav lights for true auto operation.

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Brown - to mobile phone system, (may look at this at a later date

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Interesting, this may, may allow you to connect your VHF to the radio, muting the radio if the VHF chirps into life, it may also drive you nuts and should probably be left blank /forums/images/graemlins/grin.gif


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There is a 15A fuse in the back of the set where the power connects, but there is no suggestion of the size of fuse to use in the fuse block, (either for the red, or the yellow wires above), and no suggestion of the maximum amps drawn - any ideas how to work out what to use?

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In the specs at the back of your manual it should give you power consumption. It will likely be in watts, if you can find it I will show you how to convert.

Most DVD players / head units seem to be around an amp when running. If you can turn off your display and do not pound out music at full blast you should be able to get this right down.

The manual should give you two figures, max and standby.

 

[Richard10002]

Thanks for all that! Dont we sleep??

I'm off to bed now and will have a crack at this, the AIS engine and the toilet tomorrow.

 

[ShipsWoofy]

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Dimmer: This unit is equipped with a wire that JVC calls an illumination lead, however, it acts as a dimmer lead. The dimmer can be set to Off (normal brightness at all times), Auto (display window automatically dims when your car head lights are turned on), or On (display is always dimmed). Also, this unit has a timer that allows you to turn the dimmer on for a period of time each day. The timer allows you to select a start time and an end time for the dimmer.
Note: The amount of dimming is fixed, it cannot be adjusted, and the illumination wire must be connected for Auto operation.

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Ok, it seems you do not have to connect this wire through a switch, seemingly left unconnected you can apply the dimmer via a setup menu.

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Camera: use this mode when connecting an optional rear view camera

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So you can put a mini cam up the mast and have it showing on the panel, fab toy!

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from the manual

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Hidden deep, deep in the manual I found absolutely nothing concerning input power requirement of this unit. I guess they think they are covered by providing you a power lead. I guess if you look inside the case of the lead this should contain a fuse, prolly 5A. You cannot just trust the 15A chassis fuse as this does not protect the wire. I would be happy putting this unit on a 5A terminal on my switch panel, but I would also probably manually measure the power when I fitted it too.

I think JVC is making a mistake not declaring the power consumption of this unit as it makes fitting it a little too hit and miss, their suggestion of just finding an accessory cable under your dash board is beyond belief.