hi guys
I have a Toshiba 37x3030d (same boards as 42x3030d hence the manual link)
it partially powers up (psu relay clicks and stays on for about 5 seconds, little LED on the AV tuner CI board blinks, the optical autio output comes on and both LED's on the front of the unit come on)
all voltages from the psu check out ok and switch on/off as normal
but on the low_b (second power board) there is an output to the AV board to power the LDVS board (should be 12v according to schematic diag) this doesn't give me any reading at the connector but the switching part of the circuit is getting 24v on its input pin 1 (this is a little daughter board standing vertical off the low_b board) and giving out 24v on pin 2 like the diagram shows but nothing after that,
on the same switching circuit there is a Power_lcd input back from the AV board that comes from the ocm memory chip right back in the the circuit
I just cant work out if the 12v should be on and the power_lcd is the (im ok signal) or if its the (wake up signal) ether way this has no voltage at any time on there
this is the manual, starts at the mem chip on page 50 and goes via these 65-28-23-27&24 are where I've traced the Power_lcd back to the low_b VCC_LCD switch daughter board
I did notice the protect circuit stays at 2.8v once power button is pressed/power relay is on, also tv doesn't turn it's self off if the cable from the av board to the LVDS board is unplugged
hope someone can help
Regs
Richard
I have a Toshiba 37x3030d (same boards as 42x3030d hence the manual link)
it partially powers up (psu relay clicks and stays on for about 5 seconds, little LED on the AV tuner CI board blinks, the optical autio output comes on and both LED's on the front of the unit come on)
all voltages from the psu check out ok and switch on/off as normal
but on the low_b (second power board) there is an output to the AV board to power the LDVS board (should be 12v according to schematic diag) this doesn't give me any reading at the connector but the switching part of the circuit is getting 24v on its input pin 1 (this is a little daughter board standing vertical off the low_b board) and giving out 24v on pin 2 like the diagram shows but nothing after that,
on the same switching circuit there is a Power_lcd input back from the AV board that comes from the ocm memory chip right back in the the circuit
I just cant work out if the 12v should be on and the power_lcd is the (im ok signal) or if its the (wake up signal) ether way this has no voltage at any time on there
this is the manual, starts at the mem chip on page 50 and goes via these 65-28-23-27&24 are where I've traced the Power_lcd back to the low_b VCC_LCD switch daughter board
I did notice the protect circuit stays at 2.8v once power button is pressed/power relay is on, also tv doesn't turn it's self off if the cable from the av board to the LVDS board is unplugged
hope someone can help
Regs
Richard
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