Tech Tips — May 2014

CE Professional Tech Tip Sharing

May 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, 50V500A

Reason for service:  Negative or reddish picture

Solution: Cleaned
or replaced the connector between flex and drive PCB.

Hitachi TV, 50V500A

Reason for service: Bars
in picture or screen

Solution: Suspect
50 pin connector, #EK01182, polarity or improper connections.

Hitachi TV, 46UX12B

Reason for service:  Intermittently looses channels.

Fix:  Replace defective ZD-008 and C0062.

JVC TV, AF32F703

Reason for service: Shutdown.

Solution: Resoldered
W624 jumper and replaced the following: 
C973, 10uF/50V, D432, and Q431.

Mitsubishi TV, CK-3136R

Reason for service: Dead,
just clicks

Solution:  Replaced all the following:  C901, STR-S5141G, Caps, C914, 470uF/50V,
C916, 10uF/100V, C956, 2.2uF/200V, then discovered the Q532, HOT was
shorted.  Replaced it and a 3.15micro fuse
and the set was fixed.

Panasonic TV, CT-36HX41E

Reason for service:  Intermittent shutdown

Solution: Replaced
R517 and C524.

Panasonic TV, TH42PX75U

Reason for service:  Video is intermittent on all inputs
after set is on for a while.  Audio, OK.

Solution: Clean
and reseat the LVDS cable between the main and control/logic boards.

RCA TV, ITC222

Reason for service:  Set chirps 3 times and shuts down.  No high voltage.

Solution: Flyback
LI008 bad.  If drawing number on fly is
107 56 Xxx, use 259296.  Otherwise use
265409.  Also replace TI-010, 2SC2588 and
DI-012, BYW34V, (244834) 

Sharp TV,  25RT59

Reason for service:  Jagged edges, Christmas tree effect.

Solution: Test
by installing a jumper from the cap at bridge diode output to the cathode of
125V SCR.  Bring set up on a variac.  If the jagged edges go away, replace IC701.   RH-IZ0073CEZZ

Sony TV, KVTS20

Reason for service: Black
screen but sound OK