Build Thread for TPA BIII + Ian Async I2S FIFO + OPC NTD1 + Salas SSLV - Page 10 - diyAudio
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Old 24th August 2012, 09:28 AM   #91
DQ828 is offline DQ828  Australia
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It must be contagious I think I have just cooked my BIII as well

I dont even know where to start testing & I just sold the BII I had.
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Old 24th August 2012, 12:00 PM   #92
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I'm glad to report I haven't killed it, but it does seem awfully confused, stange things are happening.
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Old 24th August 2012, 03:51 PM   #93
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Quote:
Originally Posted by ihear21khz View Post
I have no idea how Ian's adapter is designed and if it automatically disables the onboard power for the clock, One of the Tridents feeds the onboard clock crystal. If you are feeding an external masterclock signal I would expect that the Trident and supply to the onboard crystal needs to be disconnected. Hope this helps.
David
Ian's adaptor is simply remove the crystal if external clock is used. The Trident output just open and connected to nothing.
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Old 24th August 2012, 03:52 PM   #94
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Originally Posted by DQ828 View Post
I'm glad to report I haven't killed it, but it does seem awfully confused, stange things are happening.
The BIII should not be so easy be killed. Glad that you can still enjoy music from BIII. I may have to buy a new one
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Old 25th August 2012, 12:05 AM   #95
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I have decided to buy a new BIII with an OTTO II for DSD source selection. I will still try to repair the burnt BIII. If I can get it alive, then will upgrade the DAC to dual Mono.
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Old 26th August 2012, 08:45 AM   #96
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I removed all the tridents from the BIII, check each of them using a bench PSU and a VR as dummy load. None of them have problem. Then I used the bench PSU to power each sections of BIII, set the current limited to 100mA which is the current limit of trident. Both DVCC and VDD caused the PSU overloaded. I checked the circuit board and data sheet, the only thing loads these two supplies is the ES9018 chip. To confirm this, I remove the chip from the PCB again. Then apply voltage to both pins again, both pins are opened circuit and drawn no current. This further confirmed again the chip failed. Did I damage the chip during the soldering? Or bought a fake chip from China? Never know!!

I checked all the tridents and the PCB again and again but found nothing that may cause the damage to the chip. I couldn't think of any other diagnostic to be done. So I ordered another chip and put it back to the BIII. I use the multi-meter to confirm no short, then use the bench PSU to power each sections one by one and confirmed no overload. Everything seems better this time. Finally I put back all the tridents and power the BIII by the bench PSU. Total current drawn is 650mA, all LEDs on tridents "On" steadily. The Mute LED also ON. Up to this stage, everything normal on the BIII except the capacitor C17 is missing which was blown away by the hot gun and I couldn't find it.

Will connect it to the FIFO tonight and hope everything goes fine.
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Old 26th August 2012, 08:53 AM   #97
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Quote:
Originally Posted by bigpandahk View Post
I removed all the tridents from the BIII, check each of them using a bench PSU and a VR as dummy load. None of them have problem. Then I used the bench PSU to power each sections of BIII, set the current limited to 100mA which is the current limit of trident. Both DVCC and VDD caused the PSU overloaded. I checked the circuit board and data sheet, the only thing loads these two supplies is the ES9018 chip. To confirm this, I remove the chip from the PCB again. Then apply voltage to both pins again, both pins are opened circuit and drawn no current. This further confirmed again the chip failed. Did I damage the chip during the soldering? Or bought a fake chip from China? Never know!!

I checked all the tridents and the PCB again and again but found nothing that may cause the damage to the chip. I couldn't think of any other diagnostic to be done. So I ordered another chip and put it back to the BIII. I use the multi-meter to confirm no short, then use the bench PSU to power each sections one by one and confirmed no overload. Everything seems better this time. Finally I put back all the tridents and power the BIII by the bench PSU. Total current drawn is 650mA, all LEDs on tridents "On" steadily. The Mute LED also ON. Up to this stage, everything normal on the BIII except the capacitor C17 is missing which was blown away by the hot gun and I couldn't find it.

Will connect it to the FIFO tonight and hope everything goes fine.
Good luck my fingers are crossed.
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Old 26th August 2012, 07:29 PM   #98
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what frequency did you run ian's clock?
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Old 27th August 2012, 02:46 AM   #99
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Quote:
Originally Posted by bigpandahk View Post
I removed all the tridents from the BIII, check each of them using a bench PSU and a VR as dummy load. None of them have problem. Then I used the bench PSU to power each sections of BIII, set the current limited to 100mA which is the current limit of trident. Both DVCC and VDD caused the PSU overloaded. I checked the circuit board and data sheet, the only thing loads these two supplies is the ES9018 chip. To confirm this, I remove the chip from the PCB again. Then apply voltage to both pins again, both pins are opened circuit and drawn no current. This further confirmed again the chip failed. Did I damage the chip during the soldering? Or bought a fake chip from China? Never know!!

I checked all the tridents and the PCB again and again but found nothing that may cause the damage to the chip. I couldn't think of any other diagnostic to be done. So I ordered another chip and put it back to the BIII. I use the multi-meter to confirm no short, then use the bench PSU to power each sections one by one and confirmed no overload. Everything seems better this time. Finally I put back all the tridents and power the BIII by the bench PSU. Total current drawn is 650mA, all LEDs on tridents "On" steadily. The Mute LED also ON. Up to this stage, everything normal on the BIII except the capacitor C17 is missing which was blown away by the hot gun and I couldn't find it.

Will connect it to the FIFO tonight and hope everything goes fine.
Good to know you make it . Enjoy your project.

Ian
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Old 27th August 2012, 05:11 AM   #100
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Thanks DQ828 and Ian, but I didn't make it

The BIII behaved OK when I tested it with the bench PSU. Then I put it back onto the legato and connected the FIFO. Before that I checked all the output of the SSLV. Then power up, within seconds, the LED on the tridents blinking. Then I knew the same thing happened again. DVCC shorted to GND.
Since there are only two ICs and one regulator on the BIII other than those passive components. The DVCC only connected to the ES9018. I can't think of any other source that kill the BIII and the only suspect is the legato. Will check tonight.

Already lost one third of a new BIII
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