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radio removal, '91 740 GL[ALL/1988] posted by Vaughan Scott on
Monday, 26 January 1998, at 9:31 a.m.
I'm loooking to remove the original radio/cassete player from a 740 GL for repair - the radio's fine, but the sound quality goes through the floor when playing tapes, and I've heard that it occasionally eats them too. My question is how the unit is removed: is there some funky way to remove it without dissassembling the console, like the 4-pin DIN tool, or do I have to dissassemble the console still? Both?
Also, any advice on the repairs? I was planning on just pulling the covers and getting into the tape player mechanism, cleaning everything w/ isopropryl alchohol and Q-tips, greasing the relevant gears, and reassembly. Anything I'm missing? I've had success working on these things before - last one was a broken belt and sticking mechanism in a Mitsubishi factory radio.
TIA...
Vaughan Scott
vscott@fusn.com
Re: radio removal, '91 740 GL[ALL/1988] posted by R. Abel on
Monday, 26 January 1998, at 6:53 p.m.
Yesterday, I took the Radio/cassette out of my '87 740. Mine required that
I remove the knobs and then, with tools made from a wire hanger (small hooks
made from stout wire with a fairly long handle) I was able to hook into the
release tabs on the outside of each spindle (behind where the knobs attached).
You then have to pull the tabs inward (the right one left and the left one right)
to disengage a spring catch on each side as you slide the deck out of the
console. It was a bit stubborn, but eventually I was able to get the angles
right (almost cross handed as you pull) and it came out.
Now the tough part is getting someone who will work on it. Two calls today
were unproductive. Good luck.
Re: radio removal, '91 740 GL[ALL/1988] posted by Stoney on
Monday, 26 January 1998, at 9:10 p.m.
There's a guy in Queens, NY Avon Electronics on Union Turnpike who works on anything. Most of the parts are Std. stuff, he says, and if you can get the catalogues anything is available except faceplates.
Considering how many of the 700 series units include a "slave" tape deck unit, it's surprising that no one has realized the avlue of refurb. vs replacing the whole magillah! The cost of repair can be equal to replacement with aftermarket unit but doesn't include the cost of a pro. install (and I don't mean cousin Jethro who moonlights at Circuit City)I"ve fixe more than my share of problems that started when the fool cut the original harness connector off and got out his roll of black tape.....
RE: Check the wiring going to any door speakers for failure due to pinching/binding inside the accordion sleeve. One of the most frequent causes of 1/2 system not working-connector failure is #1, cracked main circuit boards are also quite common. Not only in Volvo but in many other Japanese manufactured Electronics of same vintage-I work on early 80's to mid 90's OEM Japanese TV stuff and the Green boards can't take the flexing after a while and get hairline fractures, the Brown/Honey colored circuit boards are much stronger and can accept lots more heat and flex. Remember that this was also an OEM profit point and was the most $ vs the cheapest unit cost (kinda like the Challenger), so don't expect the quality of hi end units.
Re: radio removal, '91 740 GL[ALL/1988] posted by Vaughan Scott on
Tuesday, 27 January 1998, at 8:59 a.m.
What exactly is a "slave" tape deck unit? How is it different?
BTW, I know the failure is not in the speaker wiring, since the sound is perfect when the radio is used - the problem is limited to the tape deck.
Vaughan
Re: radio removal, '91 740 GL/"Slave" unit[ALL/1988] posted by Stoney on
Tuesday, 27 January 1998, at 11:38 a.m.
Vaughn, A slave unit is one that is set up to feed signal and draw power from a head unit. I should have said "component" or "player". Anyway the tape unit shouldn't be coded just the head unit.
RE: Pulling the head unit: Those little slots are the openings for the release key. Try using a few thin screwdrivers, and a second pair of hands, and see if you can unlock the tangs inside. Push all 4 in at once, and gently pull outward. There are locks on each side and the springs may take a bit of persuasion. The other idea is to go to Wal Mart/Circuit City and see if they carry a "Universal Radio Key" set or if you can borrow one. It is a pair of metal plates that slide into the slots, relese the locks and "Bob's your Uncle"!
RE: Codes-I really don't know if head unit is coded without factory alarm function being installed. Robert, Abe, Mark???
Re: radio removal, '91 740 GL[ALL/1988] posted by Vaughan Scott on
Tuesday, 27 January 1998, at 8:57 a.m.
I'll actually be fixing it myself, so that's not a big concern (what can I say, I'm a masochistic^H^H^H^H^Hmechanical engineer!). My main problem is getting it outta the dash. My radio does not _have_ two knobs like an older-style radio: it's got one smaller knob for volume/fader/balance in the upper left-hand corner, so I don't think that's what's holding it in. The faceplate appears to come out w/ the radio. There are a coupla notches in either side of the radio, outside the bounds of the faceplate - could this be related? What about factory alarm/radio disable - will I need a dealer to punch in a code (no doubt for a hefty fee! :( after replacing it? The car doesn't have an alarm, but I don't know about the radio.
...Vaughan
Re: radio removal, '91 740 GL[ALL/1988] posted by Ed Lipe on
Tuesday, 27 January 1998, at 11:21 a.m.
If sound quality seems to be the problem then drill a small hole in the cover while you have it apart ( if it doesn't have one already) This hole should allow you to adjust the head with a screwdriver while the tape is engaged. Plug it in, play a tape, try the head adjustment... usually not much more than a 1/4 turn either way should get you there. Put a piece of tape on the hole then reinstall the unit.
Re: radio removal, '91 740 GL[ALL/1988] posted by Don Willson on
Saturday, 31 January 1998, at 12:22 a.m.
My '89 760 has two little handles that allow you to just pull the radio out. See if you have a little rectangle on the right and left of the radio. If so push it in and release it quickly, it will pop out enough to pull it out more and get a finger in it.