[TechAssist] Chrysler Car radio display problems. Part No: P4704302
- From: "Ty" <ty1k@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 25 Jun 2004 09:20:58 -0700
No cigars Albert!
From what I see in this thing, it has at least 3 crystals.
Two on the main board and one in the tuner.
No trimmers on the main board.
The one closest to the Micro has a 10,000
The other has 4,5000 stamped on it.
I have replaced the 4,5000 which I robed out of a known good radio. No
change.
I can not come up with a replacement for 10,000 crystal, and I think, it
being the closest to the micro, is probably the one I need.
I will have to find a source for it.
Any ideas?
Ty
Tiberius Kraemer
BLUE STAR ELECTRONICS
3312 Silverton Rd. NE
Salem, Oregon
Phone: 503 391 1491
Mailto:ty1k@xxxxxxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of albert walfield
Sent: Thursday, June 24, 2004 1:20 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Chrysler Car radio display problems. Part No:
P4704302
Ty change out your crystal and or shift your trimmer by crystal .
let me know if this solves problem
Albert Walfield
Albert Walfield's Electronics
28 Mulock Rd.
RR#3
Bridgewater
Nova Scotia
CANADA
B4V 2W2
Phone/Fax 902 543-9831
Email : albertwalfield@xxxxxxxxxxxxxxx
----- Original Message -----
From: "Ty" <ty1k@xxxxxxxxxxx>
To: "Techassist" <techassist@xxxxxxxxxxxxx>
Sent: Thursday, June 24, 2004 2:26 PM
Subject: [TechAssist] Chrysler Car radio display problems. Part No: P4704302
> I am attempting to isolate a display problem in this Chrysler car radio.
> Specifically, it is a Chrysler Part N: P4704302, Issue 1, Date Code 2215,
> Supplier 18629
>
> Of course, no schematic, and to be honest, I have no clue as to where to
> start.
> When first powered up the display is dead. Turning the unit on, one can
see
> the lights in the Tone Controls come on(No Radio Function).
> After about 4 minutes, some random segments of the display turn on and off
> at full brightness (No Radio Function). About 2 minutes later 00:00 turns
> on. During this time, pushing any button does not affect the display,
except
> the ON/OFF will turn the display off, whit nothing displayed.
> About 8 minutes into this sequence, 12:00 turns on (With the unit turned
on,
> indicated by the tone control lights.) Buttons still have no affect. about
> 10 minutes into this test, the buttons and display will start working
> normally (Radio function is motor boating slowly and can not tune
stations).
> Turning the unit off, the time will display, turning it back on, all
> functions are normal Including Radio. The above description is general.
> Sometimes during this warm-up period the radio will actually turn off, and
I
> cannot turn it back on for an extended period.
> Problem is that customer reports that randomly the unit will fail in the
> above described mode, although the power was not interrupted.
> Also noted that when power is interrupted for a short time, it has no
> adverse affect. Disconnect the power for about 5 minutes, the above
problem
> repeats, but even this is inconsistent.
> I made extension cables, allowing me proper access to the components.
Also,
> I have selectively sprayed with freeze spay all components as individually
> as possible, on the main board and front panel board, with no affect. I
> sprayed the two boards to a frosty state with no affect.
> I interpret this problem to be thermally related,
> Now here is the strangest part.
> I encountered the same problem with my 2000 (August 1999) Grand Am. The
car
> was under warranty and the dealer changed it out. About two months ago,
the
> replacement radio started showing similar symptoms. It is starting to drop
> display segments randomly when turned on. Reception is unaffected. Turning
> it off and on a few times, the segments turn on and the problem will not
> show up for a few days.
> Any ideas would be most welcome.
> Your time and effort is appreciated.
>
> Ty
>
> Tiberius Kraemer
> BLUE STAR ELECTRONICS
> 3312 Silverton Rd. NE
> Salem, Oregon
> Phone: 503 391 1491
> Mailto:ty1k@xxxxxxxxxxx
>
>
>
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