I have a previous thread for this tv that relates to a 2-3(2 short, 3 long) error code that was fixed by replacing the main board:
https://www.badcaps.net/forum/showth...ht=lc-70le734u
I decided to restart this thread because I felt like the 1-1 error code is the most common for the Sharp 70 inchers, and the title of the previous thread doesn't reflect the 1-1 error code and might be overlooked by someone for whom the information contained in this thread might be of great benefit. That being said, let's get to it.
I thought I had a backlight issue so I attempted the laborious process of removing the lcd screen on this bad boy. Unfortunately I cannot find any issues with the backlighting and was hoping that someone could help me troubleshoot. As you can see from the pictures below, all of the leds come on just fine. In order to get them to come on, I have to use Vol+ and Channel-. If I attempt to get into the service menu by using Vol- and Input the boomerang status light goes solid for 8 seconds and looks like everything is going to work, but then it starts throwing the 1-1 code again, so no service menu for me!
. I have 2 main boards with which to test and this happens on both of them.
The cabling only comes in from the right side of the tv, so the wiring runs to the left side of the tv are longer. There are two led strips per row. On the first row the labeling would be 1L(1 Left) and 1R(1 Right), the second row would be 2L and 2R, etc. The black and green references are for the coloring on the led pcb units, the leds are a slightly different tint, this may not show up in the pictures. I took voltage readings on each of the test points on each led strip. The initial readings are as follows:
Legend: L=Left, R=Right, B=Black, G=Green
1L(B):71.4V 1R(B):71.4V
2L(G):69.0 2R(G):74.1
3L(B):71.9 3R(B):71.6
4L(G):69.0 4R(G):73.3
5L(B):70.9 5R(B):70.6
6L(G):68.2 6R(G):73.0
7L(B):69.9 7R(B):70.9
8L(G):69.0 8R(G):71.8
9L(B):70.1 9R(B):72.5
AL(G):69.0 AR(G):72.6
BL(B):70.1 BR(B):71.2
CL(G):69.1 CR(G):74.1
DL(B):70.6 DR(B):70.9
EL(G):69.1 ER(G):72.0
I had 2 black strips that I had ordered before I knew there were 2 different types, so I attempted to replace 1R and 7R due to lower voltage for the black color. After replacement 1R jumped to 74.1V and 7R jumped to 73.8V. Unfortunately, after doing so, I noticed that 9R went down from 72.5 to 70.7.....#confused.
Please help me.
https://www.badcaps.net/forum/showth...ht=lc-70le734u
I decided to restart this thread because I felt like the 1-1 error code is the most common for the Sharp 70 inchers, and the title of the previous thread doesn't reflect the 1-1 error code and might be overlooked by someone for whom the information contained in this thread might be of great benefit. That being said, let's get to it.
I thought I had a backlight issue so I attempted the laborious process of removing the lcd screen on this bad boy. Unfortunately I cannot find any issues with the backlighting and was hoping that someone could help me troubleshoot. As you can see from the pictures below, all of the leds come on just fine. In order to get them to come on, I have to use Vol+ and Channel-. If I attempt to get into the service menu by using Vol- and Input the boomerang status light goes solid for 8 seconds and looks like everything is going to work, but then it starts throwing the 1-1 code again, so no service menu for me!
. I have 2 main boards with which to test and this happens on both of them.The cabling only comes in from the right side of the tv, so the wiring runs to the left side of the tv are longer. There are two led strips per row. On the first row the labeling would be 1L(1 Left) and 1R(1 Right), the second row would be 2L and 2R, etc. The black and green references are for the coloring on the led pcb units, the leds are a slightly different tint, this may not show up in the pictures. I took voltage readings on each of the test points on each led strip. The initial readings are as follows:
Legend: L=Left, R=Right, B=Black, G=Green
1L(B):71.4V 1R(B):71.4V
2L(G):69.0 2R(G):74.1
3L(B):71.9 3R(B):71.6
4L(G):69.0 4R(G):73.3
5L(B):70.9 5R(B):70.6
6L(G):68.2 6R(G):73.0
7L(B):69.9 7R(B):70.9
8L(G):69.0 8R(G):71.8
9L(B):70.1 9R(B):72.5
AL(G):69.0 AR(G):72.6
BL(B):70.1 BR(B):71.2
CL(G):69.1 CR(G):74.1
DL(B):70.6 DR(B):70.9
EL(G):69.1 ER(G):72.0
I had 2 black strips that I had ordered before I knew there were 2 different types, so I attempted to replace 1R and 7R due to lower voltage for the black color. After replacement 1R jumped to 74.1V and 7R jumped to 73.8V. Unfortunately, after doing so, I noticed that 9R went down from 72.5 to 70.7.....#confused.
Please help me.
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