Pioneer SX-650 Woes
- Thread starter 49hawkeye
- Start date
goat67
Addicted Member
measure to ground on the board pins
use the auto ranging on the multimeter need to see millivolts
Right Channel
6 sb 65 mv
8 sb -6 mv
17 sb < 33mv
measure power pack pins
1 sb 36 v
2 sb 1.2v
3 sb 65 mv
4 33 mv
5 -36 v
6 -1.2 v
7 -6 mv
measure pin 4 on the power pack corresponding with these pins
Left Channell
2 sb 65 mv
4 sb -6 mv
19 sb < 33mv
measure power pack pins
1 sb 36 v
2 sb 1.2v
3 sb 65 mv
4 33 mv
5 -36 v
6 -1.2 v
7 -6 mv
what wattage bulb do you have in the DBT?
The bulb should start bright and the go completely out or just barley glow.
use the auto ranging on the multimeter need to see millivolts
Right Channel
6 sb 65 mv
8 sb -6 mv
17 sb < 33mv
measure power pack pins
1 sb 36 v
2 sb 1.2v
3 sb 65 mv
4 33 mv
5 -36 v
6 -1.2 v
7 -6 mv
measure pin 4 on the power pack corresponding with these pins
Left Channell
2 sb 65 mv
4 sb -6 mv
19 sb < 33mv
measure power pack pins
1 sb 36 v
2 sb 1.2v
3 sb 65 mv
4 33 mv
5 -36 v
6 -1.2 v
7 -6 mv
what wattage bulb do you have in the DBT?
The bulb should start bright and the go completely out or just barley glow.
49hawkeye
Member
measure to ground on the board pins
use the auto ranging on the multimeter need to see millivolts
Right Channel
6 sb 65 mv = 32.0mv
8 sb -6 mv = Searches between -6.5 and -9.3mv
17 sb < 33mv = 19.9mv
measure power pack pins
1 sb 36 v = 30.03v
2 sb 1.2v = 1.25v
3 sb 65 mv = 32.1mv
4 33 mv = 19.9mv
5 -36 v = -30.02v
6 -1.2 v = -1.23v
7 -6 mv = Searches between 6.4 and 7.8mv not minus
measure pin 4 on the power pack corresponding with these pins
Left Channel
2 sb 65 mv = 13.0mv
4 sb -6 mv = -12.7mv
19 sb < 33mv = 0.00
measure power pack pins
1 sb 36 v = 30.27v
2 sb 1.2v = 1.26v
3 sb 65 mv = 58.8mv
4 33 mv = Searches between 43 to 46mv
5 -36 v = -30.27v
6 -1.2 v = -1.2v
7 -6 mv = Searches between 29 to 33mv not minus
what wattage bulb do you have in the DBT? GE Soft White 100W (uses/rated 72 W) Here's a picture taken while testing.
use the auto ranging on the multimeter need to see millivolts
Right Channel
6 sb 65 mv = 32.0mv
8 sb -6 mv = Searches between -6.5 and -9.3mv
17 sb < 33mv = 19.9mv
measure power pack pins
1 sb 36 v = 30.03v
2 sb 1.2v = 1.25v
3 sb 65 mv = 32.1mv
4 33 mv = 19.9mv
5 -36 v = -30.02v
6 -1.2 v = -1.23v
7 -6 mv = Searches between 6.4 and 7.8mv not minus
measure pin 4 on the power pack corresponding with these pins
Left Channel
2 sb 65 mv = 13.0mv
4 sb -6 mv = -12.7mv
19 sb < 33mv = 0.00
measure power pack pins
1 sb 36 v = 30.27v
2 sb 1.2v = 1.26v
3 sb 65 mv = 58.8mv
4 33 mv = Searches between 43 to 46mv
5 -36 v = -30.27v
6 -1.2 v = -1.2v
7 -6 mv = Searches between 29 to 33mv not minus
what wattage bulb do you have in the DBT? GE Soft White 100W (uses/rated 72 W) Here's a picture taken while testing.
Attachments
goat67
Addicted Member
The left Channel looks off
The dim bulb looks correct
When you installed what you called the left power pack was this for the left channel?
When you installed this one you did not come out of protection correct?
What we could try is to remove the power pack that caused you to not come out of protect. Do you have a test speaker?
If so see if you get sound out of the one channel
What have you done on the GWR-101 board have you replaced any components if so which ones?
If you changed any of these verify installation.
Q5 Q6 Q11 Q12 C21 C22 C26 C27
The dim bulb looks correct
When you installed what you called the left power pack was this for the left channel?
When you installed this one you did not come out of protection correct?
What we could try is to remove the power pack that caused you to not come out of protect. Do you have a test speaker?
If so see if you get sound out of the one channel
What have you done on the GWR-101 board have you replaced any components if so which ones?
If you changed any of these verify installation.
Q5 Q6 Q11 Q12 C21 C22 C26 C27
Last edited:
49hawkeye
Member
The left power pack was for the left channel. With this one it came out of power protection. When I installed the right channel power pack is when it did not come out.
I did not install Q5, Q6, Q11 or Q12 but did install C21 and C22 with WIMA caps. C26 and C27 each got a 330/10 cap installed. Have verified correct orientation.
If you think the left channel is off why did it come out of power protection and then not with the right channel installed? Do you still wish me to remove the right channel and try for sound or do you think I ought to remove the left channel and see what happens? Thanks so much.
I did not install Q5, Q6, Q11 or Q12 but did install C21 and C22 with WIMA caps. C26 and C27 each got a 330/10 cap installed. Have verified correct orientation.
If you think the left channel is off why did it come out of power protection and then not with the right channel installed? Do you still wish me to remove the right channel and try for sound or do you think I ought to remove the left channel and see what happens? Thanks so much.
49hawkeye
Member
Sorry for the long absence. I un-soldered the right channel, loosened the board to swing it a bit away from the pins and had to straighten the power pack pins a bit. When I did this the tips on pins 4 and 6 broke off. I also had the trace pad from pin 4 come off the board when I used the solder sucker. I then tried it and it didn't come out of protect mode. I got frustrated, buttoned it back up and walked away until today. I opened it back up and rechecked the solder on the right channel power pack traces with a multimeter. 2 set of pin pads had solder connecting them I had failed to clean up so did just that. I had checked for shorts after installing the right channel pack so this was not an issue when I tried it with both packs installed. It now comes out of protect mode and I get a hum from the left channel speaker. The hum is constant and is unaffected by what component source is selected nor the volume knob. So now you know of my disappearance for the last 2 weeks. I'm fairly certain you weren't hanging over your computer awaiting my response.
Thanks for all the help so far.
Thanks for all the help so far.
Last edited:
49hawkeye
Member
I got a good used power pack for the right channel and installed it. The unit came out of protection mode. I then hooked it up and tested it with a CD player and the FM.
I still have a constant hum in the speakers as above and the music sounds like I'm not quite on a radio station so is breaking up. Left channel volume is much lower than right and every so often it goes into protection mode and then comes out of it in about 10-15 seconds.Also it was hooked up without the DBT.
Anyone have any suggestions as to where I go from here?
Thanks for any help on this.
I still have a constant hum in the speakers as above and the music sounds like I'm not quite on a radio station so is breaking up. Left channel volume is much lower than right and every so often it goes into protection mode and then comes out of it in about 10-15 seconds.Also it was hooked up without the DBT.
Anyone have any suggestions as to where I go from here?
Thanks for any help on this.