I have been asked to look at a SONIQ E32W13D-AU 32" TV. I could find no service manual or schematics for this or any SONIQ model.
- It does not turn on, and does not seem to respond at all to pressing the Standby button on the side.
- There is a red power light on the front that remains lit, does not flash, nor does it change color, even when pressing the Standby button on the side (or any other button for that matter).
- I have never seen the backlight come on, or any sign of display.
- The integrated DVDROM does a couple of seeks, it seems to be powered and operating normally. It accepts a disc but does not respond to the eject button on the side.
I was hoping to get some thoughts on what the fault might be. I have done the following:
- Measured the voltages on the bottom power connector, which read as follows:
ADJ = 0.06VDC 0.3VAC
ON/OFF = 0.00VDC
PS-ON = 5.02VDC
5VS = 5.15VDC
+5V = 5.13VDC
+12V = 12.57VDC 0.3VAC
- Measured the SOT223 regulators on the brain board, two read 3.3VDC and one reads 1.43VDC, its a 1117-ADJ
- Static tested the the TO220 diodes at the backlight output after removing them from the board
- Diode tested the other main Schottky diodes on the PSU
- Removed the backlight connector and tried again, no change
- Measured 52VDC (+ 0.3VAC) across the black 47uF 160V on the far right of the PSU, near the LED connector
- Tried to shine a torch at the screen to see if its active without backlight, but no sign of life
Can anybody suggest where to look now?
Does anybody know what the pins labelled ADJ, ON-OFF, PS-ON are supposed to read, and what function they are?
Should I be reading more than 1.43VDC on the adjustable regulator? I could find no datasheet for the LQFP processor MSD6306PUM-XG
Thanks for any advice.
- It does not turn on, and does not seem to respond at all to pressing the Standby button on the side.
- There is a red power light on the front that remains lit, does not flash, nor does it change color, even when pressing the Standby button on the side (or any other button for that matter).
- I have never seen the backlight come on, or any sign of display.
- The integrated DVDROM does a couple of seeks, it seems to be powered and operating normally. It accepts a disc but does not respond to the eject button on the side.
I was hoping to get some thoughts on what the fault might be. I have done the following:
- Measured the voltages on the bottom power connector, which read as follows:
ADJ = 0.06VDC 0.3VAC
ON/OFF = 0.00VDC
PS-ON = 5.02VDC
5VS = 5.15VDC
+5V = 5.13VDC
+12V = 12.57VDC 0.3VAC
- Measured the SOT223 regulators on the brain board, two read 3.3VDC and one reads 1.43VDC, its a 1117-ADJ
- Static tested the the TO220 diodes at the backlight output after removing them from the board
- Diode tested the other main Schottky diodes on the PSU
- Removed the backlight connector and tried again, no change
- Measured 52VDC (+ 0.3VAC) across the black 47uF 160V on the far right of the PSU, near the LED connector
- Tried to shine a torch at the screen to see if its active without backlight, but no sign of life
Can anybody suggest where to look now?
Does anybody know what the pins labelled ADJ, ON-OFF, PS-ON are supposed to read, and what function they are?
Should I be reading more than 1.43VDC on the adjustable regulator? I could find no datasheet for the LQFP processor MSD6306PUM-XG
Thanks for any advice.
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