CE Tech Tips — November 2014

CE Professional Tech Tip Sharing

November 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: No audio

Solution: Found open LA01 on
the signal board. Replacing fixed the set.

Mitsubishi TV, WS-65515

Reason for Service: Dead, LED does not blink at plug in

Solution:  Check for 3.3V at the connector RF pin 3.  If low or missing, suspect the reset switch
S7L40 on the control board.  Part
#432P109010

Philips TV, 
42PFL5432D/37

Reason for Service: 
Power Supply still dead after replacing several bad
caps.  It chirps now.

Solution: Replace ZD904 and
902, part number P6KE120A.

RCA TV, ITC222

Reason for Service: No high voltage, power supply chirps 3 times and shuts
down

Solution: Replace the fly.
If drawing number on fly is 107 56 Xxx, use 259296.  If not, use 265409.  Also replaced TI-010, 2SC5588, #259899 and
DI-012,  BYW34V, #244834.

Samsung Plasma TV, PN58B540

Reason for Service: 
Turns off intermittently, cycles

Solution: Use the melody to
guide your troubleshooting.
Does melody play when set turns off ?
No – means power loss, replace power supply.
Yes – means the set thinks it shut off normally.  Look at 1 of 2 parts.

If the TV plays a melody, that means it could either be the main board or
the function/IR board. When you hear the relay turn on, quickly remove the AC
cord from the wall.  Now disconnect the
function/IR connector from the main board and replug the AC back into the
wall. 

Does the set stay on ?

No –  main board bad.

Yes – function/IR board bad.

Sanyo TV, DS31590

Reason for Service: 
Dead, no picture or sound

Solution: Replaced IC301
comb filter (TC90A44P) and D311, D312.

Sony TV, KF50XBR800

Reason for Service: Set cycles on and off a few times before it will stay on

Solution: Replacing the bulb
fixed the set.

Toshiba TV, 42LX196

Reason for Service: Dead with 3 blinking lights

Solution: Replace all 3
regulators in power supply even if only one checks bad. Q820, SRX2039,  Q860, STRZ4479 and Q880, STRW6765.