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| Nokia Hardware & Hardware Repair all what you need for Hardware Repairing for Nokia Phones. Before writing any thread here try to check the Frequently Asked Questions Section. |
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06-03-2001, 15:56
| #1 (permalink) |
| No Life Poster  Join Date: Apr 2001 Location: Philippines
Posts: 535
Member: 4274 Status: Offline Thanks Meter: 18 |  Z500 duplexer (3210) |
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| The Following User Says Thank You to ambot For This Useful Post: |
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06-03-2001, 21:17
| #2 (permalink) |
| No Life Poster  Join Date: Feb 2000 Location: UK
Posts: 3,186
Member: 1024 Status: Offline Thanks Meter: 5,510 | Hi, Absolutely this is the most sensitive to the heat part of the whole RF unit. As less as possible temperature. Also important rule - don't put too much copper on siver or gold plated RF parts. Best Regards |
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| The Following User Says Thank You to Bph&co For This Useful Post: |
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06-03-2001, 22:02
| #3 (permalink) |
| No Life Poster Join Date: Apr 2001 Location: Philippines
Posts: 535
Member: 4274 Status: Offline Thanks Meter: 18 | so this Z500 is the possible problem on my phone(3210) for not having a signal? Because i have tried to heat up this one and also put a little more soldering lead on its terminal... |
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06-04-2001, 20:32
| #4 (permalink) |
| No Life Poster Join Date: Feb 2000 Location: UK
Posts: 3,186
Member: 1024 Status: Offline Thanks Meter: 5,510 | Hi, Common problem with the bad/no reception in 3210 is Cobba chip. As you know this chip contain all ADC/DAC converters needed for convert I/Q analog signals to digital and back. Bad connection of the balls under the chip will cause also breaking of audio path. I saw some new versions have a glue a side of Cobba to prevent breaking the balls. To check is that a problem - twist the board (reasonable angle !) and check for change in the RSSI value change( WinTesla tests ) Best Regards |
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06-05-2001, 14:18
| #5 (permalink) |
| No Life Poster Join Date: Apr 2001 Location: Philippines
Posts: 535
Member: 4274 Status: Offline Thanks Meter: 18 |  the cobba in this unit had a glue at all sides, as i inspected with a microscope all sides with a glue were all intact and i tried to **** again with a hot air with the use of hakko850 but the unit still the same (no signal)... by the way i have accidentally put a soldering lead on the copper pad of the Z500 because i'm trying to resolder the contacts, so, does this could affect the component function? and also sorry i don't have any idea yet with regards to wintesla... if it's okey with you, can you teach me how to use it and what are the materials do i need when i have to use the wintesla? i do have a service manual... |
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