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tv aoc D26W931 Exploding Capacitor 100uF / 450V and tny277 Source Board (PSU) (1/2)

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tv aoc D26W931 Exploding Capacitor 100uF / 450V and tny277 Source Board (PSU)

tv aoc D26W931 Exploding Capacitor 100uF / 450V and tny277 Source Board (PSU) 2 мес. 2 нед. назад #5667

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initially the B + capacitor (100uF / 450V and tny277 were burnt out. Replaced them and also the 470uF / 10V capacitor of the 12V line.
The TV comes to work but after a while the source is on and off. Note a heat generated by the source . Either it has another faulty component besides the main capacitor and the tny277 or some board is consuming current beyond normal.
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tv aoc D26W931 Exploding Capacitor 100uF / 450V and tny277 Source Board (PSU) 2 мес. 2 нед. назад #5669

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Download the service manual and take measurements.

Download D26W931-D32W931-LC32W053-LC42H053 :
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tv aoc D26W931 Exploding Capacitor 100uF / 450V and tny277 Source Board (PSU) 1 мес. 3 нед. назад #5728

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I started by checking the components of the FAN7529 integrated primary stage when I found the 0 ohm resistor R920 open.
the resistor R920 was replaced and, while powering the source using a series lamp, the lamp started to flash (I even measured the voltage on capacitor C920 showing a little high voltage) until it came at a time when the lamp didn't light up.

After replacing the resistor and testing the source right away, I measured the voltages on the capacitor C920 when I realized that the voltage was back to around 185V again. It may be that the integrated FAN7529 has burned again
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