Let the amp go into protect mode and post the voltage on all of the LM339s in the power supply. Copy and past the following into your post. Place the black meter probe on the amplifier's ground terminal. Place the red meter probe on the point where you need to measure the voltage.
IC#
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
IC#
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
is it at all possible the u1620r and u1620 are installed backwards. i checked the schematics and installed them per board designation. but i want to rull that out.
also what about the messed up trade i has to fix @ one of the smd 20r0 resistors? i did my best soldering in these resistors, but it doesnt look oem by any means.
also what about the messed up trade i has to fix @ one of the smd 20r0 resistors? i did my best soldering in these resistors, but it doesnt look oem by any means.
Use your meter to confirm that you have a good connection between components on the repaired trace.
It's unlikely that you have the rectifiers installed reversed. If you did, it's likely that the amp would draw excessive current at all times. If you're still unsure, post the DC voltage on one 28N15 and one 36P15 (preferably from the repaired channel).
It's unlikely that you have the rectifiers installed reversed. If you did, it's likely that the amp would draw excessive current at all times. If you're still unsure, post the DC voltage on one 28N15 and one 36P15 (preferably from the repaired channel).
alright first off i am sure the light is NOT supposed to flash. idid not know what order to test in as i dont know the leg numbering. i started @ the left most leg and went right(started in bottom legs), then went to upper legs from left most leg to right.
ic voltage readings(voltages posted with F at end meant they went to OL with the blink of the light.)
1-.2 F
2-4.81 F
3-18
4-.15
5-2.0
6-.47 F
7-.49F
8-6.0F
9-6.0
10-.08
11-6.0
12-4.9
13-6
14-3
Now for the second lm339 and F at end of reading means going to OL with protect light
1-4.8F
2-17.4
3-8.7
4-.7
5-2.3
6-4.9
7-4.9
8-.005
9-.549
10-.024
11-1.5
12-1.05
13-5.0F
14-.5
Mosfets on output side got warm during the 10 minutes amp was on, but not hot by anymeans, none of the power side fets or other components got warm. during testing thermal light blinked on a few times.
ic voltage readings(voltages posted with F at end meant they went to OL with the blink of the light.)
1-.2 F
2-4.81 F
3-18
4-.15
5-2.0
6-.47 F
7-.49F
8-6.0F
9-6.0
10-.08
11-6.0
12-4.9
13-6
14-3
Now for the second lm339 and F at end of reading means going to OL with protect light
1-4.8F
2-17.4
3-8.7
4-.7
5-2.3
6-4.9
7-4.9
8-.005
9-.549
10-.024
11-1.5
12-1.05
13-5.0F
14-.5
Mosfets on output side got warm during the 10 minutes amp was on, but not hot by anymeans, none of the power side fets or other components got warm. during testing thermal light blinked on a few times.
IF pinout is based on this pick 1-7 are right, 8-14 are backwards meaning 8 is 14 in my post, and 14 is 8 in my post. thanks
You should have asked if you didn't know the pin configuration. Correct them and repost them. Confirm that you have them right.
alright first off i am sure the light is NOT supposed to flash.
ic voltage readings(voltages posted with F at end meant they went to OL with the blink of the light.)
1-.2 F
2-4.81 F
3-18
4-.15
5-2.0
6-.47 F
7-.49F
8-3.0
9-6.0
10-4.9
11-6.0
12-.08
13-6.0F
14-6.0F
Now for the second lm339 and F at end of reading means going to OL with protect light
1-4.8F
2-17.4
3-8.7
4-.7
5-2.3
6-4.9
7-4.9
8-.5
9-5.0F
10-1.05
11-1.5
12-.024
13-.549
14-.005
ic voltage readings(voltages posted with F at end meant they went to OL with the blink of the light.)
1-.2 F
2-4.81 F
3-18
4-.15
5-2.0
6-.47 F
7-.49F
8-3.0
9-6.0
10-4.9
11-6.0
12-.08
13-6.0F
14-6.0F
Now for the second lm339 and F at end of reading means going to OL with protect light
1-4.8F
2-17.4
3-8.7
4-.7
5-2.3
6-4.9
7-4.9
8-.5
9-5.0F
10-1.05
11-1.5
12-.024
13-.549
14-.005
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Were all of these with the amp in protect mode?
What's the DC voltage across the B+ and ground terminals when the amp is on (not in protect)?
What's the DC voltage across the B+ and ground terminals when the amp is on (not in protect)?
voltage across b+ and ground is 12.8volts, without car running. all tests were done in amp in protect mode. But it seems the amp is actually going in and out of protect mode over and over. Every time that light(protect) lights up, the voltages that do fluctuate to no reading or a lower reading, do so when light lights up.
What's the remote voltage when the amp is on (both in protect and out of protect mode). Place the black probe on the amp's ground terminal.
remote voltage @ protect mode is 11.18, off protect is 11.3. protect mode switched on and off every second roughly.
The voltage on pin 3 of the second LM339 seems low. Is it accurate?
What is the voltage with the amp not in protect mode?
What is the voltage with the amp not in protect mode?
i will recheck pin 3 now. but thats the thing with the protect mode not protect mode, i have a second or less to take voltages before it switches to or from protect mode.
How sure are you that the rest of the voltages are correct? The difference between 8.7 and 18.8 is significant. I know that you may have simply missed the 1 but I don't want to spend an hour chasing a problem that doesn't exist.
Earlier, was the amp staying in protect mode after it went into protect mode? Or did it always remain in protect mode for only a second (after remaining on for 30 seconds to 2 minutes)?
Earlier, was the amp staying in protect mode after it went into protect mode? Or did it always remain in protect mode for only a second (after remaining on for 30 seconds to 2 minutes)?
it flashed in and out of protect mode the whole time.
originally after i fixed the amp, it wouldn't flash protect mode at all, just make the burp of distortion, and that was it. the problem has gotten worse and worse.
i will recheck all voltages. and repost.
originally after i fixed the amp, it wouldn't flash protect mode at all, just make the burp of distortion, and that was it. the problem has gotten worse and worse.
i will recheck all voltages. and repost.
heres the voltages, where F after voltage means Flashing to OL from voltage posted.
1-.024F
2-4.6
3-18.5
4-.10
5-2.0
6-4.9
7-4.93F
8-3.5
9-.07
10-.08
11-.04F
12-6.02F
13-.03
14-.05
second ic
1-4.85F
2-17.4
3-18.7
4-.43
5-2.3
6-4.3
7-4.9
8-.58
9-5.2F
10-.40
11-1.5
12-.018F
13-.20F
14-4.9
i guess somehow some voltages were posted wrong before.
1-.024F
2-4.6
3-18.5
4-.10
5-2.0
6-4.9
7-4.93F
8-3.5
9-.07
10-.08
11-.04F
12-6.02F
13-.03
14-.05
second ic
1-4.85F
2-17.4
3-18.7
4-.43
5-2.3
6-4.3
7-4.9
8-.58
9-5.2F
10-.40
11-1.5
12-.018F
13-.20F
14-4.9
i guess somehow some voltages were posted wrong before.
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That voltage should be on pins 9 and 10 of U2. With the amp off, what's the resistance between pin 18 of the 3526 and pins 9 and 10 of U2?
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