KDL-55EX503 Malfunction

[jolebre51]

Hello! 

My KDL-55EX503 TV is faulty - I can turn it on for a while, but then it will go into standby with 7 flashes of the standby LED - I bought it on 12th May 2010. 

Can anyone help me please? I've unplugged it for an hour but that hasn't worked. 

Thanks!

[Thalamus.]

Hi jolebre51,

welcome to the Sony User Community Forum..:smileyhappy:

If the standby light is flashing red then this indicates that the TV's self diagnosis mode has been activated, I suggest you contact your local authorised Sony service centre and inform the them of the sequence that the Standby light flashes. Use the following link to find your nearest: Authorised  Sony service centre

[jolebre51]

Thanks for that - I'm perfectly happy to contact them as well as replacing
the part myself, I'm pretty good at electronics... don't suppose you know
what part needs replacing or how I can find out.. I spotted this, but
doesn't tell me more than the error - I need a circuit diagram for this TV..


- *Seven blinks* - High voltage shutdown. The high voltage has exceeded
33k and the unit goes immediately into safety shutdown. Check power supply
regulation and horizontal circuits.

[jolebre51]

Thanks for that - I'm perfectly happy to contact them as well as replacing the part myself, I'm pretty good at electronics... don't suppose you know what part needs replacing or how I can find out.. I spotted this,  but doesn't tell me more than the error - I need a circuit diagram for this TV..

• Seven blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.

[Thalamus.]

---

@jolebre51 wrote:

but doesn't tell me more than the error - I need a circuit diagram for this TV..

• Seven blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.

---

Hi,

not sure where you'll you will find a circuit diagram from, you could try asking the authorised repair centre but I doubt they'll share otherwise try searching the net..:smileyconfused:

[Anonymous]

Hi there Jolebre51

Did you get that 7 blink code meaning off a generic PDF by any chance (Google Search of Sony Blink Code)?  If so, it might be out of date. 

I have the following for the EX500 series:

Note: I am not a technician or an electronics engineer.  This information is provided as is.  I would strongly recommend contacting an authorised Sony Repair Centre,

Cheers

[jolebre51 · Accepted solution]

INdeed I did! the very same PDF..

I have had the TV open today - and after some checking I've disconnected the IR sensor.. which is known as the HLR Mount. Part number A-1753-636-A

The TV works perfectly now. Albeit without any remote control functions at all. Just need to replace the board, very easy job, only one cable and a couple of screws. Not ordered the part yet - I've left it disconnected and I'm going to run it for a few days, and if all is well, order the part then, I may respond with an update, but if I don't - this was the fix! Hope this helps others, apparantly the HLR Mount is a common fault on these sets.. Annoying though, it's only 3.5 years old.

[Anonymous]

Thanks for the update.  Im glad you have found the fault - or hopefully