radio gubbins

Post by **Vart** » 05 Jul 2006 10:36 am

after the dire vc608 i had ate a tape of mine i snapped and cast it out. its replacement is a fairly crabby philips r570. however despite having the same connectors the screen is light but no characters emerge.

its connected too a ground, a 12v +ve and a symbol of a sort of lightbulb thing. its unconnected to a sort of Y symbol, a second 12v and a handwritten 3. my vc608 has this down as a box with two triangles in it.

any ideas, sorry for the vagueness.

there is speaker pop when it comes on and there are lights, just no display.

its also wants negative earth.

cheers for any assistance.

Post by **Chris_C** » 05 Jul 2006 11:14 am

Can't find any kind of manual for it, but, he's at a guess what I'd expect those symbols to mean.

(Actually, before I start, when you asy its connected, what do you mean? Whats you've wired it to in the volvo???)

Anyway, you've got gnd and +ve sorted, I'm guessing the lightbulb is to dim the display at night, so should be wired to the sidelights.

The Y symbol sounds like an aerial symbol to me, the second 12V will be either the main 12V supply (which should be ignitioned, I think (again think, get a multimeter to check) that thats the black and red stripey in the radio plug, or it could be memory, which is a permantent 12V, which I think is the green in the radio plug, but I could have got those 2 backwards, so check. As to the 3... erm, no idea I'm afraid.

Can you get a photo of the back of both?

Post by **Vart** » 06 Jul 2006 05:30 pm

ok, heres some fairly shabtastic pictures of both radios and a possible new question.

hope this sheds some light, i assume whats happening the display needs a line but i can't think why or what it would need. the whole unit might be shot anyway, it did come from a rover and look what happened to them.

the question anyway,

way off topic but, after replacing the thermostat (cheers mac) the temp gauge still doesn't get to the right areas. i've confirmed the old thermo leaked, could the collant temp sensor be out or the gauge itself?

cheers for any help.

Post by **mac** » 06 Jul 2006 07:06 pm

Temp gauge - could be gauge, could be sensor, most probably sensor (always assuming the thermo I gave you hasn't stuck open).

Are you pumping gas tomorrow ? - if so I'll drop off a sensor and gauge for you (have tested both this evening - both fine).

Mac.

Post by **Vart** » 06 Jul 2006 09:36 pm

pumping totals finest 1-5 tomorrow but i'll be moving about the county from 8 in the morning so i could drop by if its easier.

if its the original sensor, which i've no reason to believe its not (although with my car.....), its done well for 20 years service, gauge wise i'm not sure. i didn't check the thermo but i might have a look tomorrow if i'm in the thinking and doing state of mind.

radio wise, the lights run quite dim anyway much like the vc608's tried too... its just the display, the speakers pop when the unit goes on and off and there light. its got a green line for memory and like you said power and ground. i guess its just another wire.

Post by **Chris_C** » 07 Jul 2006 12:35 am

Ahh, ok, they are both wired to a plug! Nah, you are right, both those plugs are a standard (old skool ISO I think... can't remember it's name though) so that won't have hurt anything. Could be the radio is knackered I'm fraid

I'll have a think, see if I can come up with anything simple to check it out.

Post by **pettaw** » 07 Jul 2006 01:04 am

The older cars (anything pre 1989 AFAIK but might be earlier) didn't have any sort of switched live, they only have 1 12V supply that's permanently on, so you might need to check exactly what you've got and what the radio needs.

Chris might be right though, it might be a duff radio.

Post by **jtbo** » 07 Jul 2006 09:12 am

I have radio power that is off when car is shut down and my car is 1988, but this is maybe actually Volvo's 1989 model as I think it was autumn-september when model year at Volvo did change and my car is registered 8/88, so who knows.

There was separate plug that had two connectors, those were 90 degrees to each other, I try to draw it below:

Code: Select all

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   |
   |
   |

Then I had that plug that had several round connectors, I think that one was used for radio originally. I took pull up power for megasquirt main relay from that 2 connector plug and if I shut down car there is no power, but key to ignition and there is power, maybe there is power in other position too, but I never use that other position...

Post by **Vart** » 07 Jul 2006 06:43 pm

might give up on this radio. i get the feeling the display has died. everything else works. just need a display to enter its code...

anyone got a cheapy working radio that'd fit those connectors? preferably without a security code or has one you know.

cheers

Post by MJ » 07 Jul 2006 07:37 pm

Do you need the display to enter the code? Can you not find a manual to tell you what to do 'blind'?

Post by **Vart** » 07 Jul 2006 07:44 pm

never had a manual. theres no clue as too what to do. it may have purposely killed itself after the code was entered wrong too many times. who knows. cost nothing, worth nothing.