Tech Tips — July 2014

CE Professional Tech Tip Sharing

July 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.

GE TV, Chassis TX81G

Reason for Service:  Dead, no high voltage.

Solution: Check
all and replace as necessary: CF09, DF04, DP18, TP15.

Hitachi TV, 43FWX20B

Reason for Service:  Freezing or any weird eeprom or micro
suspected problem

Solution: Add a
jumper from 1007 pin 1 to cathode of D019.

Hitachi TV, 46UX12B

Reason for Service: Loss
of audio

Solution: Replaced
shorted Q403 and Q404.

Mitsubishi TV, WS-655515

Reason for Service: No
power, LED blinks slow at plug in and does not stop blinking

Solution: Check
pin 3 of PC9A21for 12V; if low or missing, replace PC9A21 on main board.  #268P058020

Philips TV, 32MF605W/17

Reason for Service: Good
picture but no sound

Solution: VCC
for audio processor was missing. Replacing the supply regulator 7006, fixed the
set.  L78L08ACZ

RCA TV, CTC169

Reason for Service:  Vertical loss from top and bottom 3
inches of screen.

Solution:  Replaced 2 caps in vertical
circuit.  0.47uF/100V and 33uF/50v.  Check for bad solder in the same area.

Sanyo TV, DS31590

Reason for Service: 
Dead, fuse blown (lightning?)

Solution:  Replaced the following
parts:  Q601, Q604, Q605, D612 and the 4A
fuse.

Samsung DLP HLR4266WXXAA

Reason for Service: Picture
flickers

Solution: Replacing
the ballast fixed the set.

Samsung LNT4069FX/XAA

Reason for Service:  Picture flashes off and on, (backlight
problem)

Solution: Replace
ICM804 on power/inverter board, BN44-00167C.

Sony TV, KDFE50A10

Reason for Service:  Shutsdown and 6 blinks and relay
clicks.

Solution: Found
a bad cap in the power supply, C6049, 200uF/16V.

Sony LCD,  KDL40V4100

Reason for Service: Pic
too dark and color too rich.

Solution:  T-Con is bad, but before replacing, try
replacing just the AS15-F chip on it.  Do
a Google search to find the chip.