In the schematic you sent it shows the power supply filter caps at 330uf 63 volt
The caps that I pulled from the amp were blown and were 1000uf 50 volt but I don’t know if these were original or not since the amp was in rough shape .
The only caps I’ve ever seen in rockfords were the 330uf
Should I stick with the 330uf for the caps ?
The caps that I pulled from the amp were blown and were 1000uf 50 volt but I don’t know if these were original or not since the amp was in rough shape .
The only caps I’ve ever seen in rockfords were the 330uf
Should I stick with the 330uf for the caps ?
I've never seen a 'pro' model.
The 330uF work perfectly fine. When you buy replacements, buy low-impedance, 105C caps. When the amps are abused, the primary filter caps can overheat if standard caps are used.
The 330uF work perfectly fine. When you buy replacements, buy low-impedance, 105C caps. When the amps are abused, the primary filter caps can overheat if standard caps are used.
From Rockford's web site, the Punch 401SP was sold at Authorized Dealer "Audio Express" with minor cosmetic changes to Punch 401S. Checking the manuals for both (model year 2003) they are the same amp. I would go with the parts listed on the schematic Perry posted.
They are the same amp. Audio express had the board color changed by Rockford, added the maximum watt rating added to the badge with a little fake carbon fiber in the emblem. They wanted their own line if you will to attract buyers and sell amps. I guess they figured if their amps were pro models they would sell more amplifiers.
I see people list these all the time on ebay calling them pro models with way higher power ratings and being listed as rare. They are neither. Same exact amp as the normal model with a blue board.
I see people list these all the time on ebay calling them pro models with way higher power ratings and being listed as rare. They are neither. Same exact amp as the normal model with a blue board.
Amp will not power up .
Here is what I get on the 494
Pin 1:0.00
Pin 2:4.64
Pin 3:4.70
Pin 4:0.00
Pin 5:1.50
Pin 6:3.33
Pin 7:0.00
Pin 8:13.90
Pin 9:0.00
Pin 10:0.00
Pin 11:13.90
Pin 12:13.90
Pin 13:4.94
Pin 14:4.94
Pin 15:4.94
Pin 16:0.00
Here is what I get on the 494
Pin 1:0.00
Pin 2:4.64
Pin 3:4.70
Pin 4:0.00
Pin 5:1.50
Pin 6:3.33
Pin 7:0.00
Pin 8:13.90
Pin 9:0.00
Pin 10:0.00
Pin 11:13.90
Pin 12:13.90
Pin 13:4.94
Pin 14:4.94
Pin 15:4.94
Pin 16:0.00
Replaced the 494 and here is what I get amp still won’t power up
Pin 1:2.32
Pin 2:2.31
Pin 3:3.06
Pin 4:0.00
Pin 5:1.50
Pin 6:3.37
Pin 7:0.00
Pin 8:13.90
Pin 9:0.78
Pin 10:0.52
Pin 11:13.90
Pin 12:13.90
Pin 13:4.95
Pin 14:4.95
Pin 15:4.95
Pin 16:0.00
I checked pins 2 to 3 nothing shorted
Pin 1:2.32
Pin 2:2.31
Pin 3:3.06
Pin 4:0.00
Pin 5:1.50
Pin 6:3.37
Pin 7:0.00
Pin 8:13.90
Pin 9:0.78
Pin 10:0.52
Pin 11:13.90
Pin 12:13.90
Pin 13:4.95
Pin 14:4.95
Pin 15:4.95
Pin 16:0.00
I checked pins 2 to 3 nothing shorted
I only get 0.62 volts on the gate legs of the fets
Amp isn’t producing rail or regulated voltages .
Amp isn’t producing rail or regulated voltages .
Pins 1 and 2 would be the same as they were with the other IC if there was no rail voltage. The 2.3v on both pins will cause the duty cycle to roll back. Reduce your 12v supply voltage and the pulse width will increase.
Ok my mistake the amp is powered up and producing rail and regulated voltages .
But the amp has no audio on either channel
But the amp has no audio on either channel