phoenix gold TI600.2

[RockfordFIx]

phoenix gold Ti600 powers up with only one channel working. drive LEDs are not on for that particular channel. Q114 and Q109 do not have rail voltage. Pulled the A1964 and c5248 and they tested out fine.

 

[RockfordFIx]

does anyone have a schematic, this amp has a lot of optoisolators. could one of these be causing an issue with only half the driver circuit.

 

[Perry Babin]

Did you download the 2125 diagram from elektrotanya to see if it was of any help?
PHOENIX-GOLD MS2125 SCH Service Manual download, schematics, eeprom, repair info for electronics experts

 

[RockfordFIx]

if I short the collector to the base of Q110 the EDS for the driver circuit light up.

 

[Perry Babin]

I'm sorry but I don't know what Q110 is. If you don't get any definitive answers, find the equivalent on the MS125 diagram. The overall circuit should be similar.

 

[Bertje]

Check all fusible resistors (gray/green) and leds...first

 

[RockfordFIx]

I just found 2 of the 8 audio outputs with 35v vs. 55v. I found 2 of the 2.4ohms at 300+k ohms. I also found 100ohm resistor at 1meg. will continue repairs tomorrow. thank you

 

[RockfordFIx]

I have replaced all the 2.2 ohm and 100 ohm fusable resistors. I replaced 2 of the 2sc5248 transistors that were leaking. these were 2 near the outputs not the driver circuit. the driver LEDS come on very dim. when powered up I have approximately 4 to 5volts more on 2 of the out puts versus the other 6 outputs. going to pull the c5200 and a1943. to verify they are not open or giving false reading

 

[RockfordFIx]

I cannot find where I am bbn losing my rail voltage to on side of the driver circuit