I have amplifier PIONEER PRS d2000SPL in protection. I found defective driver IC861 (TND505) it's not on sale anywhere, I decided to put tnd506. Put, voltage appeared all. But again triggered protection. Voltage jumps. I disabled the feedback 2 leg protection transition loop but the music has not appeared. Please tell me what can be done?
BLOCK DIAGRAM HERE:
https://drive.google.com/open?id=0Byp6dPywKnEPOWFjMVh6WWRSZFU
BLOCK DIAGRAM HERE:
https://drive.google.com/open?id=0Byp6dPywKnEPOWFjMVh6WWRSZFU
Last edited:
Is the triangle oscillator running? Output FETs short? Rail missing? General look for burnt components?
Try and think of the components as separate parts, which they are. Square wave generator coming from the analogue driver. Triangle generator with oscillator, Hi and Lo drivers, buffers then output stage.
Try and think of the components as separate parts, which they are. Square wave generator coming from the analogue driver. Triangle generator with oscillator, Hi and Lo drivers, buffers then output stage.
+VH: +118
-VH: +115
IN FLAX:
1.-VL = -29.5
2.GRND
3.VL = +29
4.VCC = 12.7
5.TEMP 0.02
6.MUTE 0.01
7.PROTECT = 4.2
8.+15.6 = 15.8
-VH: +115
IN FLAX:
1.-VL = -29.5
2.GRND
3.VL = +29
4.VCC = 12.7
5.TEMP 0.02
6.MUTE 0.01
7.PROTECT = 4.2
8.+15.6 = 15.8
Hello everybody. Sorry, accidentally faulty power supply and waiting for spare parts for power supply, they came today, the unit has started, the sound was still there.
I had a suspicion of the driver tnd505 I ordered tnd506 as the other was not. So after changing drivers, on-chip tnd506 (on the driver) when a signal is applied to the RCA on the legs the LIN (14), HIN (12) jumps voltage, as I understand it signal comes through operational amplifiers from RCA, on the leg (13)SD are present 6.1V, on the leg (11) VDD 6.3V.
The output stage is intact, there is no closed transistors. Checked all diodes, everything is fine.
Please give a recommendation. Already the 2nd month working on it, I want to finish the job.
Regards.
On the scheme I found the missing driver supply voltage (tnd505), there should be a minimum of 16v in place of these 6v, I did change on the scheme d731 UZDS16(B)
Voltage was normaly. On the board I connected MUTE line with line PROTECT(4V) and power and AMP began to work normally on output terminal I get sound. But when I return back line of protect , protection is triggered again and power supply restarts..
For any help I will be grateful.
Voltage was normaly. On the board I connected MUTE line with line PROTECT(4V) and power and AMP began to work normally on output terminal I get sound. But when I return back line of protect , protection is triggered again and power supply restarts..
For any help I will be grateful.
Hi
I have aproblem with this amp too, it alternately switches between blue and red led every one second , i think it goes to protect mode always and every time it tries to turn on. Does Any one have an idea?
I don't know what voltage should be the protect line? it doesn't turn on at all to measure voltages
I have aproblem with this amp too, it alternately switches between blue and red led every one second , i think it goes to protect mode always and every time it tries to turn on. Does Any one have an idea?
I don't know what voltage should be the protect line? it doesn't turn on at all to measure voltages