Hi. I'm new here.
I recently was given an Olevia 747-b11 47" LCD TV (very heavy object)
Symptoms: When powered up has dark screen, no sound.
Am told problem originally occurred when TV was operated one day for many hours in very high ambient temperature (Florida, summer, A/C broke down)
Details:
When Plugged in and main power switch on, blue pilot light appears.
When TV is POWERED UP, Blue pilot light goes out, a click is heard, a brief 'chirp' is (sometimes) heard coming from inside the TV, no activity, dark screen, no sound.
Observations:
When powered down, D1 LED is RED.
When powered up, Main PCB has many GREEN LEDs,
2 RED LEDs (D1, D2 RED)
and 1 LED comes on briefly as GREEN (D96) then goes dark, sometimes with a high pitched chirp sound coming from main PBC in this area as the protection circuit shuts the set down. The LCD backlight never comes on even for a second.
24VDC observed at both TCON boards with VM.
Fuses (8 on each) TCON board test ok (tested in circuit with ohmmeter)
Shielding removed to reveal TCON boards, Main PCB, Power supply PCB.
No visibly bad caps on any of the above PCBs.
PCB IDs / numbers:
MAIN PCB
DigiMedia Technology
SDA1 R0.9
PCB P/N EPC-P508201G000
STICKER P/N sc0-p5028201-s10 NS1
STICKER S/N CSHN7B01202355
POWER SUPPLY PCB
Delta
DPS-408AP B
Rev S3-F
S/N A16W0742049708
TCON PCB - left
CMO S
4H.V1838.351 / E2
VK8A183L02 0735TD-S11172
27-D005130 1470H1-24-V01-D1H0 REV 1H
TCON PCB right
All numbers exactly same as above EXCEPT is M11172 instead of S11172
Anyone know what other model badges this TV might appear as? parts interchanges for PCBs?
Help?
I recently was given an Olevia 747-b11 47" LCD TV (very heavy object)
Symptoms: When powered up has dark screen, no sound.
Am told problem originally occurred when TV was operated one day for many hours in very high ambient temperature (Florida, summer, A/C broke down)
Details:
When Plugged in and main power switch on, blue pilot light appears.
When TV is POWERED UP, Blue pilot light goes out, a click is heard, a brief 'chirp' is (sometimes) heard coming from inside the TV, no activity, dark screen, no sound.
Observations:
When powered down, D1 LED is RED.
When powered up, Main PCB has many GREEN LEDs,
2 RED LEDs (D1, D2 RED)
and 1 LED comes on briefly as GREEN (D96) then goes dark, sometimes with a high pitched chirp sound coming from main PBC in this area as the protection circuit shuts the set down. The LCD backlight never comes on even for a second.
24VDC observed at both TCON boards with VM.
Fuses (8 on each) TCON board test ok (tested in circuit with ohmmeter)
Shielding removed to reveal TCON boards, Main PCB, Power supply PCB.
No visibly bad caps on any of the above PCBs.
PCB IDs / numbers:
MAIN PCB
DigiMedia Technology
SDA1 R0.9
PCB P/N EPC-P508201G000
STICKER P/N sc0-p5028201-s10 NS1
STICKER S/N CSHN7B01202355
POWER SUPPLY PCB
Delta
DPS-408AP B
Rev S3-F
S/N A16W0742049708
TCON PCB - left
CMO S
4H.V1838.351 / E2
VK8A183L02 0735TD-S11172
27-D005130 1470H1-24-V01-D1H0 REV 1H
TCON PCB right
All numbers exactly same as above EXCEPT is M11172 instead of S11172
Anyone know what other model badges this TV might appear as? parts interchanges for PCBs?
Help?
Comment