CE Tech Tips — February 2016

CE Professional Tech Tip Sharing

February 2016

**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.

Emerson TV, LC320EM9

Reason for Service: Set shuts down, back light comes up briefly

Solution: The inverter
transformer was bad. (#LTZ3PC0XB004)

Hitachi TV, P42H401A

Reason for Service: Set clicks and shutdown; it may start after repeatedly
trying

Solution: Loose connections
from the X-sustain down to the X-right driver board.  Hard wire the connections.

Hitachi TV, 60SX2K

Reason for Service: 
Hum in the audio

Solution:  Found two leaky transistors: Q4013 and Q4008.  Replacing them fixed the audio.

Hitachi TV, 53FDX20B

Reason for Service: No sync on main picture, but PIP picture is ok.

Solution: Replaced IX04

LG LCD TV, 42LH20-UA

Reason for Service: 
No audio

Solution: Replaced front
board, EBR59217402.

Panasonic TV, PT47WXC43G

Reason for Service: Dead set

Solution: Replaced T802.

Philips TV, 50PFP5332D/37

Reason for Service: 
Dead, power supply not starting

Solution: Notice stand up
board on the power supply board. 
Resoldering the connections where this board solders to the power supply
board fixed the set.

RCA TV, ITC008 chassis

Reason for Service: Set shuts down after a few seconds

Solution: Replaced bad TX508.

Sanyo TV, DP42849

Reason for Service: Set runs fine for a few seconds, then backlight goes
out

Solution: Before replacing
the power/inverter board, ohm the four small blue poly caps next to the large
inverter transformer.  If any of them are
out of range, try replacing them before ordering the new board.  (C327, 10kΩ, C330, 81Ω, C333, 10kΩ,  C329, 81Ω)

Vizio TV, VT420M

Reason for Service: 
Powers up with backlight, but no picture or OSD

Solution: Replaced the T-Con
(no difference); replacing the main fixed the set.

Zenith TV, E44W48LCD, MD042B Chassis

Reason for Service: Audio popping or won’t display 1080i correctly

Solution: Replace 550
Digital Board.   (3171VSN916C)