CE Tech Tips — August 2018

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information. 

Samsung TV, LN37A550P3F
Reason for Service:  Normal picture goes to white screen in about a minute
Solution: There’s a bad chip on the T-Con; use freeze spray to find and verify.

Samsung TV,  PN60E7000
Reason for Service:  Might be dead, or comes on for a short time, then turns off
Solution:  Look for bad solder on the FETs. Clean and resolder.

Sony TV,  KDL32S20L
Reason for Service:  Backlight comes on for short time then goes off; 4 blink error
Solution: Look for bad ccfl tubes, shorted FET drivers and/or defective output transformer.

Sony TV,  KDS55A2000
Reason for Service:  Shutdown with 4 blink error
Solution:  Remove back and look for dust in exhaust fan. Cleaning should fix the set.

Panasonic TV,  TCP50U50
Reason for Service:  Shutdown, 8 blink error.
Solution:  Found Q051 shorted on SS Board; DG3D3020CVLW.  Use screw kit also: XYN3-F6FJ-18PK.

Toshiba TV, 46SL412U
Reason for Service: Power LED flashes at turn on, but set won’t start
Solution: Found bad Q30 on main board; replacing fixed set.

Vizio TV, VX37LHDTV10A
Reason for Service: No backlight. Emblem turns amber when set plugged in, then turns white when set turned on. Cannot turn set off without unplugging.
Solution: Power supply voltages okay. Main regulator U7 was bad.  Replacing it fixed set.

Westinghouse TV,  TX42F430S
Reason for Service:  Dead, has amber standby
Solution:  Found bad cap, TC51.  470uF/16V.  Replacing fixed set.