GSM-Forum - View Single Post - Pinfinder not detected, cant find adapter -- solution

Sethxp · 10-22-2008, 08:02

@kaino147

first, remove all multiplexers and try to detect box without them, if box is sucesfully detected, solder them back, one by one and try to detect box after each multiplexer you will find which is faulty. Multiplexer cost few cents. So if one or more is faulty, simply find which, buy it and change it.

reason why they go bad is that many phones dont have rx/tx in system connector and when you connect power wires and cable to phone, red power led will go off and some shorting happens that can damage multiplexer/s.

part number of multiplexer is

74HC4051 SMD
8channel analog.MX/deMX SO16
price is 0.52c circa

regards

10-22-2008, 08:02	#7 (permalink)
Sethxp Freak Poster Join Date: Feb 2002 Location: Czech republic Age: 43 Posts: 479 Member: 9291 Status: Offline Thanks Meter: 84	@kaino147 first, remove all multiplexers and try to detect box without them, if box is sucesfully detected, solder them back, one by one and try to detect box after each multiplexer you will find which is faulty. Multiplexer cost few cents. So if one or more is faulty, simply find which, buy it and change it. reason why they go bad is that many phones dont have rx/tx in system connector and when you connect power wires and cable to phone, red power led will go off and some shorting happens that can damage multiplexer/s. part number of multiplexer is 74HC4051 SMD 8channel analog.MX/deMX SO16 price is 0.52c circa regards