20.04.2009, 15:59
Ok... mine is 4400 Report Monitor, maybe the power consume is greater than in other previous machines and maybe the Z124 isn't enough to give all the power needed. After the rewire the voltage is better, before that when I start to record, the voltage dropped below 5V and monitoring thru the speakers appears a big and rare noise. Try this in your 4400 Report Stereo while recording and tell me if that noise appears.
I replaced also the three electrolic capacitors, the big one for a 16V / 2200uF and the other two for 25V / 100 uF, all are capable for working at 105º. I tried also to solder another big capacitor in pararel to try to double the capacity, but it doesn't help.
Also the led consumes 20mA instead of the 40 mA of the original bulb... what I couldn't do is to solder the led to the original points of the bulb, because I don't know where were originally in the board. The schematic says that the original bulb is 5V, but I didn't find a 5V point in the board while measured it with the tester, so I soldered the led to a 6.5V with a resistor in serial.
I replaced also the three electrolic capacitors, the big one for a 16V / 2200uF and the other two for 25V / 100 uF, all are capable for working at 105º. I tried also to solder another big capacitor in pararel to try to double the capacity, but it doesn't help.
Also the led consumes 20mA instead of the 40 mA of the original bulb... what I couldn't do is to solder the led to the original points of the bulb, because I don't know where were originally in the board. The schematic says that the original bulb is 5V, but I didn't find a 5V point in the board while measured it with the tester, so I soldered the led to a 6.5V with a resistor in serial.