|
|||||||
| Home | Forums | Rules | Articles | Store | Gallery | Blogs | Register | Donations | FAQ | Calendar | Search | Today's Posts | Mark Forums Read | Search |
  |
|
|
|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving |
 |
|
|
Thread Tools | Search this Thread |
9th May 2011, 01:53 AM
|
#1 |
|
diyAudio Member
Join Date: Mar 2010
|
rockford 851s rare problem
i replaced u404 and 403, many times because im getting -16volts on pin 7 on both opamp, at last i measured the ping 6 on u404 after pull out the opamp and some resistor when i was looking for the source of the neg. voltage
this is what im gettin right now.. i pull out r406, u404 and u403 check this pic 
Last edited by stoke; 9th May 2011 at 02:11 AM. |
|
|
9th May 2011, 01:59 AM
|
#2 |
|
diyAudio Member
Join Date: Nov 2003
Location: Louisiana
|
Can you send me a copy of the diagram. I can't read the text.
babin_perry@yahoo.com What is the DC voltage on pin 5?
__________________
Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links |
|
|
|
9th May 2011, 02:10 AM
|
#3 | |
|
diyAudio Member
Join Date: Mar 2010
|
Quote:
remember u404, u403 and rb406 are pulled out check your email |
|
|
|
|
9th May 2011, 02:33 AM
|
#4 |
|
diyAudio Member
Join Date: Nov 2003
Location: Louisiana
|
If you set your meter to diode check and place the red probe on pad 6 or 7 for U404 (black probe on amp ground), what does your meter read?
Are any of the pins in the remote bass level jack crossed?
__________________
Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links |
|
|
|
9th May 2011, 04:04 AM
|
#6 |
|
diyAudio Member
Join Date: Nov 2003
Location: Louisiana
|
Is there any DC on the speaker terminals?
Does the position of the crossover switch make a difference?
__________________
Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links |
|
|
|
9th May 2011, 04:51 AM
|
#8 |
|
diyAudio Member
Join Date: Nov 2003
Location: Louisiana
|
Is there any DC voltage on the frame of the crossover switch?
__________________
Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links |
|
|
|
9th May 2011, 10:59 PM
|
#10 |
|
diyAudio Member
Join Date: Nov 2003
Location: Louisiana
|
Do you have -10v on any pads (not the power supply pads) for U402 or U403?
What's the DC voltage on the RCA shields?
__________________
Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links |
|
|
|
| Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
| Thread Tools | Search this Thread |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Rockford Fosgate bd 1000.1 Problem | lukeman269 | Car Audio | 11 | 8th April 2011 10:35 PM |
| Help with rockford 851s | stoke | Car Audio | 34 | 8th February 2011 05:03 PM |
| Rockford 800a2 problem with right channel | Witwe | Car Audio | 17 | 17th December 2010 03:50 PM |
| Rockford Fosgate POWER 250x2 problem | chemhaz | Car Audio | 2 | 15th August 2010 09:08 PM |
| rockford 4060x problem.. | marko | Car Audio | 5 | 17th March 2009 06:52 PM |
| New To Site? | Need Help? |
| Page generated in 0.09012 seconds (81.55% PHP - 18.45% MySQL) with 10 queries |
