Tech Tips

Tech Tips — September 2014

CE Professional Tech Tip Sharing
September 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 picture, no OSD, sound is normal and lamp is on.  Some random color dots can be seen.
Solution: 1.8V from power
supply on  connector PPS2 was
missing.  Replacing the power supply
fixed the set.
Hitachi TV, 
53SDX01B
Reason for Service: 
No audio from ext. input 2
Solution:  Do a hard reset and re-adjust horizontal position and sub
brite in service mode.
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.
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, MM101
Reason for Service: 
Audio from the left channel was buzzing
Solution: Found a shorted
cap between pins 4 and 6 of the output. 
C11912
Samsung TV LNS4041DX/XAA
Reason for Service: Won’t start, but cycles
Solution:  Check power supply for bad caps and bad solder on Q801,
Q802.
Samsung LNT4069FX/XAA
Reason for Service: 
Picture flashes off and on (backlight problem)
Solution: Replace ICM804 on
power/inverter board, BN44-00167C
Sanyo TV, DS31590
Reason For Service:  Dead, fuse blown
(lightning?)
Solution:  Replace the following parts: Q601,
Q604, Q605, D612 and the 4A fuse
Sony TV, KF42WE610
Reason for Service: 
Lamp enclosure gets too hot
Solution: The sirocco fan
above the housing was clogged; clean it out.
Toshiba TV, 37AV502U
Reason for Service: Dead
Solution:  Found two 150V zeners in the power supply bad.

Tech Tips — August 2014

CE Professional Tech Tip Sharing
August 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: Loss of brightness
Solution: Replaced IC-006.
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.
JVC TV, AV36850
Reason for Service: Dead
Solution:  Replaced C926, 1000uF/16V.
Mitsubishi TV, WS55909
Reason for Service: Timer light blinks continuously. PS 5V and 3.3V are low.
Solution: Check and replace
C9811 surface mount, located across from the 12V supply on IC9800.
Panasonic TV, PT-47WX53/RP
Reason for Service: No picture but you see retrace lines
Solution: Replaced Q944 and
Q945.
Philips TV, 
50PFP5332D/37
Reason for Service: 
Dead
Solution:  Replaced 3 caps, C601 and 609, both 470uF/25V and C036,
100uF/50V.
Samsung TV, HLR5067W
Reason for Service: 
Vertical stops working, intermittently, good sound
and lamp ok.
Solution: Found SM C9005 in
digital board open. 10uF/10V.
Sharp TV, LC52E77U
Reason for Service: 
Replaced a bad main board, and now a “k” is
flashing on the screen.
Solution: When you turn the
set on and see the k, quickly toggle volume up and channel down together.  You’ll be in the service menu.  Look for Industry Initialization in the menu,
activate it and wait until it finishes. 
Unplug the set then plug it back in and turn it on. The “k” should be
cleared now. 
Sony LCD, 
KDL40V4100
Reason for Service: Picture too dark and color too rich
Solution:  T-Con is bad, but before replacing, try replacing just
the AS15-F chip on it. 
Toshiba TV, 42HP83
Reason for Service: Set would play for a couple of minutes then shut down.
Two blink code.

Solution: One of the fans
had stopped running, replaced with 23125910.

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.

Tech Tips — June 2014

CE Professional Tech Tip Sharing
June 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 and TP15.
Hitachi TV, 43FWX20B
Reason for Service: Horz noise in picture when first turned on.
Solution: Wiggle the anode
connector at each CRT to determine if this causes the symptom, if so, replace
that lead.
Panasonic PT-47WX53
Reason for Service: 
No audio
Solution: Check and replace
as necessary: R881, R880 and D2321.
Philips TV, 21PT6446-44, L03.1LAA
Reason for Service:  Vertical
is shrinking down.
Solution: Replaced D6460 SM diode in vertical section, and check or
replace C2444 and C2465.
RCA TV, ATC221
Reason for Service: Convergence not working
Solution: Convergence power
supply not working because FP251 and FP221 were open.  Replacing fixed the set.
RCA TV, ITC222
Reason for Service: Set pulses 3 times then goes into shutdown
Solution: Check the ground
straps on the CRTs.  Make sure they are
not touching anything shorting out.
Sony TV, KPCX35
Reason for Service: 
Bright picture with no contrast
Solution: Found C650 on the
G board open.  100uF/160V.
Sony TV, KV32FS120
Reason for Service: 
Dead, 9 blink error code
Solution: Replacing D647
fixed the set.  #10ERB20, NTE125
Toshiba TV, 34HD82
Reason for Service: Picture was jagged jittery and sometimes more than one
picture side by side.
Solution:  Found many bad caps on the vertical mounted MVPU15 board
assy.  Replacing them fixed the set.
Vizio Plasma, P50HDTV20A
Reason for Service: 
Shuts down

Solution: Replace all the
following in the power supply:  C201,202,203,227,271,272,282
and 283.  Check 261, C275.  Measure voltage in and out of all the
regulators on the main board.  Replace
any found bad.

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

Solution: Bringing
up screen you could see vertical collapsed. Found and repaired bad connections
on IC501 and the yoke plug.