Hi All!
I,m troubleshooting a Hisense 32K20DW that won't turn on.
5VSTB is present when the set is off. When turned on, 12V are present, SW >4V. No sound, video or backlight. The STB LED blinks 6 times, then goes off.
Here are the pins and voltages at the 10-pin connection to the Main Bd:
ON:
STBY 0V
12V 12V
GND 0
16V 0V
SW 4V
The same pins when OFF (the standby LED on the bezel is red):
STBY 5V
12V 12V
GND 0V
16V 0V
SW 4V
Strangely enough, the largest cap C829 reads both 178VDC and 368VAC across it's leads with my VOM.
Other caps on the PSB and their on voltages follow:
C827,828 45V
C855,861,862 12V
C717 by LED pwr 0V
I suspect power supply, would greatly appreciate knowing if these factors point to any specific component.
I,m troubleshooting a Hisense 32K20DW that won't turn on.
5VSTB is present when the set is off. When turned on, 12V are present, SW >4V. No sound, video or backlight. The STB LED blinks 6 times, then goes off.
Here are the pins and voltages at the 10-pin connection to the Main Bd:
ON:
STBY 0V
12V 12V
GND 0
16V 0V
SW 4V
The same pins when OFF (the standby LED on the bezel is red):
STBY 5V
12V 12V
GND 0V
16V 0V
SW 4V
Strangely enough, the largest cap C829 reads both 178VDC and 368VAC across it's leads with my VOM.
Other caps on the PSB and their on voltages follow:
C827,828 45V
C855,861,862 12V
C717 by LED pwr 0V
I suspect power supply, would greatly appreciate knowing if these factors point to any specific component.
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