CE Tech Tips — December 2014

CE Professional Tech Tip Sharing

December 2014

**NOTICE**

Due the danger and complexity of electronics repair, the following shared
technical tips are intended for professional reference only. Please refer to
manufacturer’s recommendations as Encompass does not guarantee the accuracy,
reliability or safety of this information.

Hitachi TV, 46UX12B

Reason for Service: 
No sound from read speakers.

Solution: IC-4614
defective.  Check PCB for 4 unknown
diodes not listed in manual.  Replace the
4 leaky diodes.

Hitachi TV, 
65XWX20B

Reason for Service: 
No video, audio or OSD.  Turning up screens, you will see some.

Solution:  Check video mute AC protect and H BLK, found Q445
shorted.  Replaced.

Magnavox TV, 
27MS4504AC

Reason for Service: 
Set shuts down.

Solution: Screen control
very touchy, try adjusting that. Check for bad solder on the vert IC, and make
sure it has it’s B+

Mitsubishi DLP TV, WD-62327

Reason for Service: 
Dead, Red light error 34.

Solution:  Check for 5V at J-9 connector pin 1 and 2 on the engine
driver board.  If missing, replace the
power board #930B921001.

Panasonic TV, TH42PX60U

Reason for Service: 
Dead, 10 blink error code.

Solution: Replace PA board,
#TXNPA1BJTUE 

RCA TV, MM101CC

Reason for Service: 
No audio coming out of speakers, but had audio on
fixed level.  Audio going into U11702,
but not coming out.

Solution:  Replacing U11702 and Q11701 fixed the set.

Samsung TV, HLR5678WX/XAA

Reason for Service: 
Video seems to shake or flicker. After several
minutes, picture gets too bright.

Solution:  Check for bulged caps on the power board.  Replace as necessary.

Samsung TV, LNT4661FX/Xaa

Reason for Service: The video and OCD is too dark.

Solution: Replacing the
T-Con fixed the set.

Sanyo TV, CLT2054

Reason for Service: Brightness is changing every second or so.

Solution: Check power supply
for bad caps.  1000uF/16V.

Toshiba TV, 37AV502U

Reason for Service: Dead

Solution:  Found two 150V zeners in the power supply bad.