Tag - tv troubleshooting

04 Jan

CE Tech Tips — January 2022

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is 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, 60V500A
Reason for Service: Sound distortion (rattling sound) on speaker with action movie and bass set to max.
Solution: Replace side protector between woofer and power supply with new part MN06392. 

Samsung TV, LN46A530P1F
Reason for Service: No backlight, power supply comes up with all voltages.
Solution: Replaced main board to fix.

Samsung TV, UN55C6900VFXZA
Reason for Service: Dead set.
Solution: Replaced 2 components in power supply. ICB801 and ZDB802.

Samsung TV, UN40F6300
Reason for Service: Dead set, power LED 2 blink error.
Solution: Found bad SM cap, RS802, replacing fixed set.

Sanyo TV, DP42841
Reason for Service: Audio cuts out at high volume and crackles sometimes.
Solution: Replaced Audio IC LV4906.  

Zenith TV, P42W46X
Reason for Service: Black screen, slowly gets better the longer set is on.
Solution: Found C61 in power supply bad. 47uF/50V.

Zenith TV, Z50PG10UA
Reason for Service: No video or OSD, screen lights up.
Solution: Replacing upper buffer fixed this set.

 

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22 Nov

CE Tech Tips — December 2021

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is 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, 60V500A
Reason for Service: Sound distortion (rattling sound) on speaker with action movie and bass set to max.
Solution: Replace side protector between woofer and power supply with new part MN06392. 

Samsung TV, LN46A530P1F
Reason for Service: No backlight, power supply comes up with all voltages.
Solution: Replaced main board to fix.

Samsung TV, UN55C6900VFXZA
Reason for Service: Dead set.
Solution: Replaced 2 components in power supply. ICB801 and ZDB802.

Samsung TV, UN40F6300
Reason for Service: Dead set, power LED 2 blink error.
Solution: Found bad SM cap, RS802, replacing fixed set.

Sanyo TV, DP42841
Reason for Service: Audio cuts out at high volume and crackles sometimes.
Solution: Replaced Audio IC LV4906.  

Zenith TV, P42W46X
Reason for Service: Black screen, slowly gets better the longer set is on.
Solution: Found C61 in power supply bad. 47uF/50V.

Zenith TV, Z50PG10UA
Reason for Service: No video or OSD, screen lights up.
Solution: Replacing upper buffer fixed this set.

 

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19 Oct

CE Tech Tips — October 2021

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information.

 

Coby TV, TFTV3227

Reason for Service: Loses video intermittently
Solution: We found a ground wire that was supposed to be screwed to the metal frame, had no screw.
Replacing the screw fixed the set.

LG TV, 50PC5D
Reason for Service: The screen had many red horizontal lines across the top part of it.
Solution: Replacing the upper buffer restored a good picture.

LG TV, 32LC7D
Reason for Service: Left side of the screen it too dark.
Solution: Found two bad caps on the inverter board, C215 and C218, 270uF/10V.

Samsung TV, LN-S2641
Reason for Service: Set won’t start.
Solution: Replacing the main board fixed this set.

Samsung TV, LN26A450C1DXZA

Reason for Service: Dead set.
Solution: Found and replaced bad regulator on main Board, IC1001. Check power supply for domed caps also.

Sharp TV, LC-52E77EU
Reason for Service: Set won’t start, power light blinking.
Solution: Replacing main board fixed the set.

Sony TV, KDL55W802A
Reason for Service: Set won’t start, 2 blink error.
Solution: Found and replaced 2 bad transistors in the power supply, Q6502 and Q6503. In addition, R6547 was bad, 0.1ohm/5W.

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22 Sep

CE Tech Tips — September 2021

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is 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, LC320EM2A
Reason for Service: Powers on with high pitched squeal
and blinking power light.
Solution: Found shorted diode in power supply. D633, 27V/1W. 

Insignia TV, NS-LCD47HD-09
Reason for Service: No video, backlights okay.
Solution: Replacing U507 on main board fixed set.
(was running very hot)

Panasonic TV, TH42PZ700U
Reason for Service: Dead, seven blink error.
Solution: On SC module look for row of SM FETs.
Check for shorts by lifting on leg of each. Q641-Q654

Samsung TV, UN55ES6100
Reason for Service: Set won’t connect to Internet.
Solution: Replacing the Wi-Fi module fixed set.

Samsung TV, LN55C750R2F
Reason for Service: Set intermittently had video, then went out all together.
Solution: Before replacing T-Con or main, sub crystal X11 from scrap set.  If no good, replace T-Con.

Samsung TV, PCL542R
Reason for Service: Dead set.
Solution: Replaced IC801, IC802 and IC806.

 Sharp TV, LC52D64U
Reason for Service: Dead set. F7000 blown.
Solution: Replaced Q7805, Q7808 and fuse to fix set.

 Sony TV, KV40XBR800
Reason for Service: Shuts down with 6 blink error.
Solution: Found and replaced bad cap C6556, 33uF/160V.

 

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22 Jul

CE Tech Tips — July 2021

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information.

Hisense TV, 50K360G
Reason for Service: Has audio and backlight, but no picture.
Solution: Replaced T-Con. 

LG TV, 32LX1D
Reason for Service: Dead set
Solution: Replacing C127 and C127 restored normal operation.

Panasonic Combo, PVDM2791
Reason for Service: No vertical
Solution: Replaced the following: U451, LA7331, C401, 2.2uF/50V, C402, 470uF/16V, C408, 1uF/50V, and C409, 100uF/35V.

Samsung plasma, HP-R4252
Reason for Service: Picture has red dotted horizontal lines
over 3/4 of the screen.
Solution: Replacing both lower and upper buffers fixed the set.

 

Sony TV, KDL55EX710
Reason for Service: Set shuts down a couple of hours after turning on. 7 blink error.
Solution: Ensure set has good ventilation; might have to replace BAL board.

Vizio TV, E370VLE
Reason for Service: Set won’t start. Logo changes from amber to white, but no B/L, no sound.
Solution: Found D120 on power board was shorted. Used MUR460.

 Vizio TV, M470NV
Reason for Service: Unit powers on, logo goes white then back to amber and set never starts.
Solution: Reflowing U9 on main board fixed the set. 

Westinghouse TV, DW37H1G1
Reason for Service: Set just keeps cycling the colors and will not turn off.
Solution: Unplug set, hold MENU button down while plugging set back in.

 

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16 Jun

CE Tech Tips — June 2021

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is 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, L32A403
Reason for Service: Set comes on, works okay for an hour then panel shuts
off; sound and other functions work. Turning the TV off, then back on,
set works again for an hour then repeats.
Solution: Replacing inverter board assembly fixed the set. 

Hitachi TV, 57F59A
Reason for Service: No video or weak video. No voltage on the
ABL pin of the fly.
Solution: Replaced open RH28. 

Hitachi TV, 57F59A
Reason for Service: HDMI issues, changes colors, snowy picture,
loss of one or more colors, all white, shuts down.
Solution: Replace Signal Board and make sure software
Hitversion is V201 or higher. 

LG TV, 60LS5750
Reason for Service: After set is on for a few minutes, screen has
many red vertical lines, then picture turns off, but audio remains.
Fix: Replacing T-Con fixed the set.

 

Panasonic TV, TC-32LX85
Reason for Service: No power.
Solution: Found bad photo opto in power supply. PC7000.

Samsung TV, UN40F5500
Reason for Service: Dead, 2 blink error code.
Solution: Found SM RS802 that feeds the opto was open. Replacing fixed the set. 10 ohm. 

Sony TV, KDL-40V4100
Reason for Service: No video.
Solution: No 12V to T-Con. Replaced U21, (AS15F) on T-Con and replaced F1422/1421 on BU Board.

Sony TV, KV40XBR800
Reason for Service: Dead set.
Solution: Replacing relay RY6502 fixed the set.

 

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18 May

CE Tech Tips — May 2021

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information.

Dynex TV, DX40L150A11
Reason for Service: Backlights come on briefly, then screen goes black.
Solution: Replacing inverter module restored normal operation. 

Emerson TV, LC-320EM2A
Reason for Service: When pushing power button, there is a high pitch
squeal and blinking blue power light.
Solution: Replaced shorted D633 in power supply. 27V/1W. 

LG TV, 47LH40UA AUSVVLHR
Reason for Service: Dead set.
Solution: Found bad Opto in power supply, PC502; replacing it fixed the set. 

LG TV, 50PA4500
Reason for Service: Power button or remote will not turn set on.
Solution: Found bad cap in power supply, C802. Replacing it fixed the set. 0.022mF/1600V

 

Samsung TV, LN32B360C5d
Reason for Service: Set turns on one time at plug in, then won’t turn on again unless it is unplugged first.
Solution: Repairing bad tab on power supply board used for CCFL tubes fixed set. 

Sony TV, KDL40Z4100
Reason for Service: Dead, no standby.
Solution: On power supply board found shorted IC6101 and an open R6127, 10 ohm/Fusible.

Sony TV, KDL40V4100
Reason for Service: Dead set, no standby.
Solution: Replacing Fusible resistor R6200, (10 ohm/half W) and IC6200 restored normal operation.

Vizio TV, M420NV
Reason for Service: Set had no video, but sound was okay.
Solution: Installing eeprom kit fixed the set.

 

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27 Apr

CE Tech Tips — April 2021

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is 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, 60SDX88B
Reason for Service: Picture displays a pin problem.
Solution: Replacing Q657 fixed this set.

Hitachi TV, 42HDS69
Reason for Service: Set just clicks when powered on.
Solution: Replaced two 3300uF/100V caps in power supply.

Insignia TV, NS42L780A12
Reason for Service: Set had good audio, but no picture because no backlight.
Solution: In the power supply, Q801 and Q802 were shorted, (had bad solder) and R801 was burned.  0.1ohm/2W.

Panasonic TV, TCP50X5
Reason for Service: Dead, may be intermittent.
Solution: Replaced U203 on back side of power supply.

 

Samsung TV, PN51D550C1
Reason for Service: Six blink code when you plug in set, but set will not turn on.
Solution: Determined it was bad Y main, then found shorted C5020 on Y main.  Replaced C5020.

Sony TV, KDL40V2500
Reason for Service: Right side of screen had video strobing; left side no video at all.  Audio okay.
Solution: Found 3 bad caps in power supply, C6204, C6205 and C6207.
Replacing these fixed the set.

Sylvania TV, LC190SL1
Reason for Service: Dead, fuse blown.
Solution: Replaced Q601, Q602, R610, 0.39Ω/2W and D607 zener. Also check D605, D606.

 

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29 Mar

CE Tech Tips — March 2021

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is 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, 60V500A
Reason for Service: Lamp LED blinking.
Solution: Check door lamp switch – boss on door or lamp assembly may not close switch. Apply tape to boss.

LG TV, 60PV250UB
Reason for Service: Set had no video, but audio okay.
Solution: Replaced Z-Sus and resoldered coils on Y-Sus.

Philips TV, 47PFL7403D/F7
Reason for Service: Dead set, no LED.
Solution: Found fuse open, U101 was shorted with black pin hole on top.  Also check for bad 120W resistor that feeds U101.

Samsung TV, PN51F8500AF
Reason for Service: Dead set, main fuse blown.
Solution: Found shorted transistor, QP804C on power board.  Replacing it and fuse fixed set.

Sanyo TV, DP42841
Reason for Service: Dead set, no standby.
Solution: Replaced R606 and IC601. STR-A6051M.

Sony TV, KDL40EX400
Reason for Service: Dead set with no standby.
Solution: Replaced following: IC6101, D6302, D6304 and R6107, 10ohm/1W.

Sony TV, KDL40SL140
Reason for Service: Dead set.
Solution: Set had no standby, fusible resistor R6200 open. 10ohm/half watt.

 

 

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19 Feb

CE Tech Tips — February 2021

**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is 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, 53SDX01B
Reason for Service: When set turns on, screen is black except for OSD.  Channels changing constantly if you can see them.
Solution: Replaced defective DM04 on control board.

LG TV, 47LE5400
Reason for Service: Set won’t start past LG Splash logo. No buttons work.
Solution: Removed large plastic heatsink and then reflowed large IC on main board.

RCA TV, HD50LPW175
Reason for Service: FPD lights up, then blinks five times, and nothing further happens.
Solution: Check all following caps in power supply: C624, C639, C641, C647 and C640.

Samsung TV, LNT3242HX/XAA
Reason for Service: Dead set, has 5V standby.
Solution: Replaced RM801 in power supply.  0.22W/1W

Samsung TV, LN46A550P3F
Reason for Service: Set makes screeching noise then shuts off.
Solution: Replaced C102, SM 47uF/6.3V Blue box cap.

Sony TV, KDL32L504
Reason for Service: Dead set.
Solution: Found bad IC6102 bad; replaced with Sony 670880101.

Viore TV, LC37VF55
Reason for Service: Set had bad picture, almost like solarized.
Solution: Replacing AS15-F on T-Con fixed set.




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