Hi guys: this Sony KVHS500 started with intermittent shut down with no blinks,now after a few days it shows 3 blinks sometime it starts right up sometimes it takes 1 or 2,3 pushes on the remote,which leads me to some confusion,pulled up the diagnosis test shows 0's no faults, i know,3 blinks is Low +B Over voltage (OVP) IC6505 maybe faulty. (D Board, anybody here knows about this intermittent faults?thanks
-
Hello everyone. π
As per thread title, this unit has a serious SMPSU fault. It blows F1001, which is a 10A M205 in the phase from the mains input.
Very first thing I tried, was simply replacing the fuse, but the replacement ceramic fuse blew immediately.
Looking at the schematic for this PSU, I then removed what I thought was the next likely candidate: D1001 - the HV main bridge rectifier.
This isolated the fault(no longer blows the main fuse), but does not point me to the actual fault.
There are no devices that have exploded or otherwise show signs... -
I would like to get some help on a 820-2850 logic board with intermittent charging problem. Sometimes the battery will charge all the way and sometimes magsafe would be cycling between green and orange.
I have already tried replacing dc-in board, swapping good battery, swapping genuine 85w chargers. None of that helps..
when it is not intermittent:
PPVBAT_G3H_CHGR_R is 12.07v
when it is intermittent:
When the light is green, PPVBAT_G3H_CHGR_R is 12.99v
when the light is orange, PPVBAT_G3H_CHGR_R is 11.62v
data line on the battery...07-25-2025, 08:18 PM -
- Prior owner tried a replacement main board. No difference.
- Samsung 2x red blinking standby LED = panel fault
- Jumpered FB_TRDY_1 (pin 1 CN1300 left. main tcon->left side buffer boards) and FB_TRDY_3 (pin 95 CN1301 right. main tcon->right side buffer boards) This allows testing individual T-Con (on main board) connection to panel on this Samsung. Found fault on left side (viewing from rear of TV)
- Each side has 2 buffer boards, disconnected left side flex between 2 buffer boards. Fault is on the left most board.
- Tape masking eventually isolated to CN1300 pin 15 (CKV4_GOA) Display
-
I have been having a fun time at work with two pieces of equipment that had shorted components or shorted component cables to machine frame
I would check what my multi meter was telling me about how many ohms I getting with the multi meter was telling versus the ESR was telling me about weather or not it really was a short to machine ground or not
One note at first we thought that it might be a bad I/O card or a malfunction PLC including me as well but I thought I would try and see if removing the I/O cables would make a difference or not and this time it did make a difference... -
Hello! yes I know there is already lots of information about this issue. I have a Panasonic TC-P55ST50 that originally displayed an 8-blink error code. Following the troubleshooting flowchart, I ended up replacing the SS board. However, even after replacing it, the issue persists. The TV turns on and stays on without displaying an image, and continuity is confirmed on all connectors. What am I missing hereπ€?
Ok Im a mechanical engineer ...but I thought I was able to follow a rather simple flowchart for electric troubleshooting π.
TV Model: Panasonic TC-P55ST50
...11-20-2024, 08:52 PM