| Author |
Message |
    
Skipshooter
| | Posted on Sunday, October 06, 2002 - 11:40 pm: | 
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Need help with this problem. It powers up but does not key up or receive (can hear slight receive when vol is at 100%). When facing the unit, the left side get very warm after about 5 minutes. Help??? |
Taz
| | Posted on Monday, October 07, 2002 - 2:07 am: |
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pll is probly shot |
Tech671
| | Posted on Monday, October 07, 2002 - 5:41 am: |
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You might ask 307, I'd suspect the voltage regulator. |
307
| | Posted on Monday, October 07, 2002 - 6:51 pm: |
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I would guess the Audio IC is bad..Ya thats it...I think it is a TA7222AP but could be wrong...It has been a while since I seen one...
307 |
Taz
| | Posted on Monday, October 07, 2002 - 8:42 pm: |
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well, its one of the 3 |
Skipshooter
| | Posted on Tuesday, October 08, 2002 - 12:15 am: |
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Where can I find (purchase) these parts? |
307
| | Posted on Tuesday, October 08, 2002 - 8:46 pm: |
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No it is not one of the three , Just the Audio IC , However send me your address via tech307@copperelectronics.com (put in it what you are emailing me about , I get tons of email) and I will send you one on me IF you report what happens..
307 |
Taz
| | Posted on Tuesday, October 08, 2002 - 9:07 pm: |
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ok, the audio ic is one of the 3 ;-) |
Skipshooter
| | Posted on Tuesday, October 08, 2002 - 11:16 pm: |
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Thanks 307,
I will e-mail you with info. I will keep everyone posted on what happens.
Again, thank you all for your help,
Skipshoter |
Skipshooter
| | Posted on Tuesday, October 15, 2002 - 6:31 pm: |
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307,
Let me start by saying thank you for your help. I received the part in the mail today. I can't seem to find its match on the units pcb. Most of the ics have 8 leads, the one you sent has 7. Is it the ic at location "IC3" ? It looks simular but is much smaller in size. The pcb is identified with PC-833AF if that helps.
Thanks again,
Ben |
Jyd
| | Posted on Tuesday, October 15, 2002 - 7:43 pm: |
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your looking at the wrong one,if i wer you i would e-mail 307 and find out what it would cost you to let him fix it,he is awsome! |
Skipshooter
| | Posted on Tuesday, October 15, 2002 - 9:10 pm: |
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307,
I think the unit has a NEC PC1242H audio IC chip. Or at least that is the numbers on the chip that seems to gets very hot. It has a green Triac or transistor to the right of it. Both mount to the chassis for cooling needs.
I hope this helps..
Ben |
307
| | Posted on Tuesday, October 15, 2002 - 9:33 pm: |
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Hmmm..What is the part number on the one I sent you? I looked it up on the schematic....If it is the wrong one , drop it in the mail to me and give me the number of the one you need. I am sure I sent you the right one though...email me at tech307@copperelectronics.com for my address..
307 |
Skipshooter
| | Posted on Wednesday, October 16, 2002 - 7:58 pm: |
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307,
It has a NEC upc1242H, you sent a NEC C1182H3. I think the upc1242 is actually a newer replacement for the old NEC c1182H3 chips. So far thats what I've been told by Cobra...
Is there away to use the c1182H3? |
307
| | Posted on Friday, October 18, 2002 - 7:04 am: |
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Just send that one back , I will get you the right one out today..Email me direct with your address again...
307 |
Skipshooter
| | Posted on Sunday, November 03, 2002 - 2:37 am: |
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307,
Received the part and installed. No change. Thanks for the effort.
Ben |
2600
| | Posted on Sunday, November 03, 2002 - 9:38 pm: |
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The UPC 1242 WILL install in place of the 1182, by grounding TWO pins in place of the single ground pin on the original 1182. You just have to ground the RIGHT two pins.
Sounds like it's time to check the PLL unlock detector and the regulated power supply. Do you have a voltmeter? A 'scope? If not, I think you may have gotten as far as you can with this one. It sure sounds like a 'screwdrivered off the air' job to me. The cure for that is a full alignment. Even if they put it to sleep by turning ONLY ONE slug too far, the rest probably got twisted in an effort to revive it. You might take a bright light and magnifier to look at all the little gray tuning slugs. If you see any cracks in the tops of any slugs, it's a bad sign, but would confirm my 'screwdriver' theory.
73 |
Skipshooter
| | Posted on Monday, November 04, 2002 - 1:25 pm: |
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I have located a local fella here who seems to know his stuff (he used to work for cobra's tech department - so he claims). This will be a good test for him I guess. I'll let everyone know how it turns out.
It's just one of those things that just bugs the heck out of ya for some unknown reason.
However, it'll make a great conversation pc as a door stop for the radio room...
Nothin but smiles and grins.....73's
Ben |
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