titanium 900.7 power supply
Posted: Tue Mar 23, 2010 8:15 pm
Hi Guys,Never had an amp this nice just starting to appreciate it when when she just quit.Took it to a repair shop they tried and said the replacement transistors just blew again.Took it to a friends shop and he emailed me to say........Mike,
Re: Phoenix Gold Titanium 900.7 amp.
I took apart the amp you brought in last week and diagnosed the problem to the DC to DC converter circuit. The amplifier section is O.K.
The last technician that worked on it had replaced 5 surface mount transistors which are all burnt up. I noticed that the part #'s of transistors he had replaced do not match with the originals that were not de-soldered from the board. In order for me to repair the amp, I need either a schematic or a parts listing of the OEM transistors that were replaced by the previous technician.
I need the manufacturers part #'s of Q172, Q171, Q170, Q169, Q155, Q154, Q152, Q151.
Some of the transistors listed above were not replaced, but the part # written on the top of them are slightly distorted/scratched.
See what you can get me........either a service manual or schematic or OEM part #'s for the transistors listed above etc. I always take a picture of a customer's circuit board before I remove or replace any defective components; this way I can always reference the picture in case I forget which parts go where etc.
If the transistor is burnt up & I can't read the OEM part #, I will not guess & solder a substitute on the board, just like the last technician did..............I would either get a schematic or another working identical amp to read the correct part #'s etc.
Erik.
Re: Phoenix Gold Titanium 900.7 amp.
I took apart the amp you brought in last week and diagnosed the problem to the DC to DC converter circuit. The amplifier section is O.K.
The last technician that worked on it had replaced 5 surface mount transistors which are all burnt up. I noticed that the part #'s of transistors he had replaced do not match with the originals that were not de-soldered from the board. In order for me to repair the amp, I need either a schematic or a parts listing of the OEM transistors that were replaced by the previous technician.
I need the manufacturers part #'s of Q172, Q171, Q170, Q169, Q155, Q154, Q152, Q151.
Some of the transistors listed above were not replaced, but the part # written on the top of them are slightly distorted/scratched.
See what you can get me........either a service manual or schematic or OEM part #'s for the transistors listed above etc. I always take a picture of a customer's circuit board before I remove or replace any defective components; this way I can always reference the picture in case I forget which parts go where etc.
If the transistor is burnt up & I can't read the OEM part #, I will not guess & solder a substitute on the board, just like the last technician did..............I would either get a schematic or another working identical amp to read the correct part #'s etc.
Erik.