RCA 50LB45RQ Service Manual
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RCA 50LB45RQ Service Manual

Thomson
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For qualified
service
personne_
only
Version
1,,0 for 2012
Mode_,
50LB45RQ
Made for Today.
www.rca.com

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  • Page 1 For qualified service personne_ only Version 1,,0 for 2012 Mode_, 50LB45RQ Made for Today. www.rca.com...
  • Page 2 Revision No. Revision Date Page Description May, 2012 Initial Release Version 1.0...
  • Page 3 1.1 Basic Specifications 50 inches Diagonal Display Size Television System American TV standard ATSC/NTSC system VHF:2-13 UHF:14-69 CAW:1-135 Channel Coverage Storage Temperature is -20°C-+60°C (-4°F-+140°F) Temperature Operating Temperature is 0°C-+50°C (+32°F-+122°F) Storage Humidity: Less than 85% RH (No condensation) Humidity Operating Humidity: Less than 80% RH (No condensation) AC 100-120V,...
  • Page 4 1,2 Product Function Side Keypad Buttons If you cannot locate your remote, you can use the side keypad buttons on your TV to operate many TV features. INPUT: Displays the Source Select List. MENU: Displays the TV Main Menu. OH ,, : Scans up through the channel list. In the TV menu system, it acts like the up arrow on the remote control and can be used to select menu options.
  • Page 5 1.3 Connection Interface HEAD PHONE: Connect a 3.5mm headphone for personal audio. Digital Audio-out: Connect a coaxial cable for digital audio output. HDMI1, 2, 3, 4: (High-Definition Multimedia Interface) It provides an uncompressed digital connection that carries both video and audio data by way of an integrated mini-plug cable. AUDIO OUTPUT L/R: Connect double-channel coaxial cables for analog audio output.
  • Page 6 2.1 General Information GENERAL DESCRIPTION OVERVIEW V500HJI-L01 is a 50 TFT Liquid Crystal Display module with 12-CCFL Backlight unit and 2ch-LVDS interface. This module supports 1920 x 1080 Full HDTV format and can display 16.7M colors (8-bit). The inverter module for backlight isnt built-in.
  • Page 7 3.1 Inner Structure Inside cabinet (front) Version 1.0...
  • Page 8 Item List RE32185B050 IR board 22F, 38.5X12.3X1.6mm RE0340E011 Key board 22F, 107X12X1.6mm RE01 TC81ELNA0 Main board T.RSC8.1E (It is for version 2012) RE46DZ2009 Power board IPB539 200W RE261530458105 Speakers 8Ohm, 10W Note: (1,2) 22F and dimensions refer to the PCB board. 3.2 Main board connection CN17 CN25...
  • Page 9 Jack List Jack N01 Specification Description connection Note CN25 10 Pin 2.54mm Main power To Power board C N 17 2x20 Pin 2,0ram LVDS interface To LCD panel 14 Pin 2.0mm IR and keyboard jack To IR board and keyboard 6Pin2.0mm Inverter Jack To LCD panel inverter board...
  • Page 10 3,4 Connection Diagram 50" LCD panel 12Pin flat cable ..4 LVDS double array cable CN17 CON5 3Pin to 6Pin flat cable ;u _ CON4 © 4Pin to 4.Pin flat cable CON3 _ CNA3 © © CON2 CN25 AC 100o120V CON1 10Pin to 10Pin...
  • Page 11 Note: Before opening the cabinet and working on the repairs, please read the troubleshooting and Q&A attached in the user's manual, which has covered most of the problems caused by unproper using or settings to the TV set. If that does not work, please carry out the easy troubleshooting before checking or replacing the main parts of the television.
  • Page 12 4.2 Troubleshooting for Displaying Note: If the troubleshooting given below can not help you, change the LCD panel for a try. But we strongly suggest you regard changing the panel as the last step of fixing the display problem. No display (including white screen, black screen, etc.) •...
  • Page 13 4.3 Troubleshooting for Audio Note: Comparing with the display problem, the audio malfunctions are easier to work out. Constantly, if you have excluded the possibility of bad speakers and bad connection of audio output, the problem generally comes from the audio processing parts of mainboard.
  • Page 14 Keys are sunken • Check the screws that fasten the keyboard to the cabinet. They may be lost or getting loose. • The key set may be bad, change them. There is a reacting delay when operating the keys o That is usually caused by bad keyboard, change it for a try. Functions of keys are out of order o Check the keyboard to see whether there is a short circuit between each soldering joint.
  • Page 15 Note: The exception handles are prepared for qualified personal only. 5.1 Display Exceptions 5,1.1 Black screen and no display Note: If the troubleshooting guide can not help you with the obviation of faults, please change the non-conforming materials to rework. Check the external power supply...
  • Page 16 5ol DispJay Exceptions 5.1.2 White screen White screen supply for panel works check the voltage on the PIN no.1-3 of o m m u n ica tio n between is voltage on S-pole of Q7(5V or 3.3V) i_normal whether Ithe jumper of CN2?, voltage on C-pole...
  • Page 17 5.1 Display Exceptions 5.1.3 Dazzling screen Reset the driving voltage Check if the LVDS Change LVDS cable cable is bad e if the panel is bad? Change LCD panel Check if the out network and the Change main board normal Check the power supply and clock circuit of U8...
  • Page 18 5,2 Audio Exceptions 5,2.1 No sound (completely) No sound Check if there is audio input Check external equipment <_, volume are Set the mute and volume Does CNA1 Check the TV speakers _ve output signa if the Audio power supply circuit p1,2,3,34,35,36 is bad, change main board s ok?
  • Page 19 5.2 Audio Exceptions 5.2.2 No sound (TV) Refer to NO SOUND Check if the circuit Change U8, if that doesnt betweenUT3andU8 work, change main board Change UT3 Version 1.0...
  • Page 20 5,2 Audio Exceptions 5.2.3 No sound (HDMI) Unsupported signal, change Is the signal _]]_1 source HDMI OK? input signal of HDMI device Check if the PC/AV Refer to NO SOUND sound is normal Change U7or <,_ Is the EDID(1) YeS>ill or main board Upgraded firmware Note (I): EDtD means Extended Display Identification Data...
  • Page 21 5,3 Function Exceptions 5,3.1 TV function rv can't scan channel/no picture} Check-Pv' RF signal (antenna, cable) by UT2, LT17 <_Check !!p14an_-- I2C network is bad, YesA N___ UT3 s bad, change UT3 Change main board Change Note: (1) iF: Intermediate Frequency (2) AGC: Automatic Gain Control...
  • Page 22 5.3 Function Exceptions 5.3.2 HDMI no picture No signal or image abnormal under HDMI the in Replace the signal source signal source under HDMI is norma Overhaul the relevant if the input circuits between HDMI on the pin under relevant input channel and U7 HDMI channel...
  • Page 23 5.3 Function Exceptions 5.3.3 YPbPr no signal YPbPr no signal Check the YPbPr AV device | or YPbPr cables U8 surrounding circuits are bad, change main board U8 front circuits are bad, change main board work, change main board Version 1.0...
  • Page 24 REC8(it is for version 2012) series main board has a USB SERVICE port, which is reserved for service use only. Please upgrade the firmware according to the instruction below. 6.1 Direct upgrading (do no need normal display) STEP1 Get an empty USB disk with size not larger than 2GB, copy firmware file (CompBase.bin, or AIICompBase.bin) to the root directry of disk.
  • Page 25 6.3 Upgrade Color Balance Table and Backlight configuration file 1 .When you finish to upgrade the basic software, it will display the software date in the factory main menu. the software date 2. Download the color balance table file (CompQuality.bin) and backlight configuration files (ComScaling.bin)
  • Page 26 Adjust Color Balance Table (White Balance) FACTORY MAIN MENU has a WB function, you can adjust the white balance in this menu by adjusting R/G/B value. Press the remote control buttons "MENU"_"1147" to enter the factory menu (see below). Choose "WB"(White Balance) and press OKto...
  • Page 27 ¢ Main Board (SCH) CN25 RE01TC81ELNA0 (2012) PVLU IOPlN 2 5&I>H G 100ttF-25V-+20%-6*7-105 R215 _%_STB 0 htF- 0402-Y%_-+ 80%-20% -16_, _R2'46 0 htF-0402-Y%_-+ 80%-2_ 1, -16_, 4K7dun-0402-_S°>l,'l_V VC?Panel 10Kohm-@D2-_5%- M 6W AO34(_ 10Kohm-@D2-_5%- H 6W 100uF-25V-_20%-6*7 PMBT390_ 0 htF-IMO2-Y5_,c+ 80%- 20%- 16_, POWER ON 510oban-_02-+-_%- 1/I6W PMI3T39BI...
  • Page 28 o ..........Main Board (SCH) RE01TC81ELNA0 (2012) 52- STB LE) R 3.3V STB LB3G 3IC;dm>{M02-+5%- H o%V RII4 DDC S(E 3K3dnn-{g02-+5%- [ 16W RII9 RtI8 DID(" SDA Rg_; RI20 R122 R124 RI07 ^'^ _"_ ¢.-../.-..1% %/X/" GPY08 R126 3(£bhm-0d02-_25% GND 75ohm-O40Z-:k_/_ 1q6W...
  • Page 29 ......Main Board (SCH) RE01TC81ELNA0 (2012) <,G15 DVD STB <.GI6 D DAT RPll 4*33dm>0402-_5%- IVB2TMS <'_ BFTX SKSN :_-_ SFCS NL_ 2 TCK DVD IR ' > SbTK NB2TDI A S1,VO NB2TDO sFrx AsmPx__x AstEMD0 _F_I6 'R238 10Kobm-0402-_5%- H6W £16 TRST 10Kol_n-0402-_5%- Ii16W...
  • Page 30 Main Board (SCH) 5X 4052 5X 4052 RE01TC81ELNA0 (2012) TRY8 > G%_D Y LI' IuF-0603-Y5V- +80%-20%- 10\, h_C-0_3 -Y5V-+ 80%-2de _ t0V 100Koln n-0402-_5%- 1/ 16_vV 100Kotun-( '_P_-_5%- I,'I6W _R43 _R72 100Koln n-0_2-_5%- 1/ 16_vV 100Kohm-( '_2-_5%- l,16_V YPbPri "f _N/Np R79 YPbtM Pb' 'N/NP...
  • Page 31 ..i ... : ......Main Board (SCH) RE01TC81ELNA0 (2012) IOKoban-0402-_5%- 1.16W IOKoban-0402-_5%- H6W DAO LOUT AUDIO AUDIO CI21 LINE OLTL LI>,EOUqR 22ohm-0d02-_5%- 1/16W 0.22t iF-0_2-XSR-±t 0%- 10V DA1 ROUT t0Kot_n-0_)2-±l°i_ Iit6W AINL3 htF-0603-Y5_,c+ 80%-2@ b-I0\, (24911 9 .._V_Nlg(} 0 ItlF-(_O_-YSV-+80q 8-20°...
  • Page 32 ¢ Power-Block NDDI2 1111 vDuiz v,'x> T_D12 T_D12 Main Board (SCH) ..TC, TC, TC,7OTC, , "VI)D12 V,_S RE01TC81ELNA0 (2012) TI)D12 V,_S I_0805-XSR-±t_ ----C173--[C14 "VI)D12 TI)D12 V,_S O%'D VDD12 AT_DI_LLA 0 htF- 0_2-Y5_,_+ 8(Bb-20%- 16V 0 hl_O402-YS_,L+ 8(P, b-20%- 16%" AVDD12PII_ Nil I A'v_DI_LLC...
  • Page 33 84pad DDR2-SDRAM (DDR2-800) (2-1ayers cus tom) Main Board (SCH) iGbit (64Mwords x 16bits) RE01TC81ELNA0 (2012) DDR2 i/f-Block 4*33otml-0402-_5%- Ii16W SODO0 DRacM ,%0 SODO5 DI_acM DRacM AI TOP VIEW %/,,/, aOA4 Hi,_ SDA4 SODOI DR_M A2 DI_acM CT_,S rramx pkg. llxl]@a H3[_ SIX'AS 4 SOCAS...
  • Page 34 ¢ Main Board (SCH) RE01TC81ELNA0 (2012) NC -- G%'D TU 5V NC -- hlF-0603-".L%'- +80%-2(P. 6- @(50 TU _%_ 220ohm-Od02-_5%- 1/16W 220ohm-Od02-_5%- H6W 4K7olm>0402-+__%- H 6W 4K7olml-O_2-+2 %-H6W Ii. G_.D TU SD_ TI2_ _- S(K' I1' O_'D IF ACRP IF AC_7" IFACK_ A16.___ IFAGC...
  • Page 35 ¢ Main Board (SCH) RE01TC81ELNA0 (2012) 10Kohm-{}d02-__1%-Iit6W 330pF-_02-X7R-±I 0%- 50V htF-0603-YST-+80%-20%- NC'Lbhm-0402-=5%- 1/ 16_V q- ( LOUT ROUT ¢...
  • Page 36 Main Board (SCH) RE01TC81ELNA0 (2012) AI 5V © G%_D Diff. pairim_edancel00ohm <ON3 21 SHWL2 AHP{_ SHELIA tlP DET A1 _V Pd36 G2X'D G2"D ASDA DIX" DATA DK'CLK ASCL 10Kol?a n-0402-_5%- 1/ 16W Q_gl 47Kdm>0402-_5%- 1/16W CE Remote 4R7ohm-lM02-+5%- Ii16W ARZQM 47Kolza n-0402-_5%- 1/ 15W G2X'D...
  • Page 39 [IIIIIIIIIIII] ;;_i!i °;; .._,_ _d__F4°_?%_o/' ..0 _4_R42 cl8 _ a_ Q° C_8C3 _2S9 ..© _;_ s _ o,2_ _o_ °,2s _ EB_E'bUUU _ r_ c3 r_ _cl24 c® @°°3 _@002 ..c_sTC] n_r/m C_cao...
  • Page 41 Power board (SCH) RE46DZ1750 INPUT:ACI00V 240V/3A C201 c207 CON2 R402 ..C401 ..i ....+i2v +12VSN3A ..] ....+12v i i io ..VPFC ..] ....] ....C107 Rl12 ..+5VSg Ril6 PSON RIO3 R102 iii ..
  • Page 42 Power board (SCH) RE46DZ1750 80201 I,,I RS208 C202 VPFC © L202 R207 L203 ER28 R216 ..t _c2oJ_ _i ..N_ _2o_{ D202 2o3] _'-_ -_ ____ i' ..'i - c2o8 -[-T R221 R210 VER: 1.0 2012.02.10 Sheet 2 Of 4...
  • Page 43 Power board (SCH) CON5 o ..RE46DZ1750 C603 o..VBL+ 104/400V/MPP SGND D602 0 VBL R629 T301 R628 ER28(4+4) D603 oOO rNTVCrpT (VREF) 44:94 i:i00 R638 ± VPFC °°o_, o_o_ " _..1 " V_F_ 1" T ++2--1 ..R604 I ++_A ..
  • Page 44 Power board (PCB) RE46DZ1750 £ EC405 B1-53900227-ZH 18.0mm --I_ ll3.0mm 248.0mm 266.0mm XXXXIPB740A VER1.0 2011 - Non Feb 27 175516 2012...
  • Page 45 Power board (PCB) RE46DZ1750 • • • BoneR • iRon • • • • " "'" "" 'i'i -'-" 4mmk • • • • i • ill • • • • • • • • • • • I In i i •...
  • Page 46 Power board (PCB) RE46DZ1750 • • • • • • .• • 0.o. • • • • -.-0 • • • • • • • _" o" • • • • . .z--- e • • • & • • •...
  • Page 47 Power board (PCB) RE46DZ1750 i'--Ir ui'i r77r7 VBL+ ¥8L÷ i ii ii i?i,,, VBL- VBL- E°b[:"] FIFIFIFI ..FIFIFI,, FI ,_, m OFIFIFIFIFIFI FIFIFIFI FIFI_ IrAqi II-I.E_ _a_' ,q ,q ' m ,q l q , q ,q , q | _ _| _mO _ _'__¥_'_ Fi,_,Fi II Fi,,[q_...
  • Page 48 Power board (PCB) RE46DZ1750 XXXXIPB740A VERI.0 2011 - Mon Feb 27 17"54:05 2012...
  • Page 49 Power board (PCB) RE46DZ1750 SIZE PLATED <S> +/-0,0 +/-0.0 "_ +/-0.0 Jr [ +/-0.0 ,50 # +/-0.0 -I _ +/-0.0 0.7x 2.8 "I "L YES +/-0.0 "_ +/-0.0 "1 "ff YES +/-0.0 +/-0.0 -I _ +/-0.0 _.z_._ +/-o.o -I 9 +/-0.0 35 _ +/-o.o...
  • Page 50 • ÷ 323ZBDO02 Rubberfoo_ Stand base bracket Standbase 1455731Z0 NeckBracke_ 30557300Z Washse[ Z45573000 Stand _racket _G[}[: 305573001 Washse[ Z45573100 Washse_ S6[}[: 145573Z00 Neckcove_ 145573000 Stand neck LB42K1500 Cable damp 2450AL000 Backcover HIF!; _aJn board Powerboard 153297030 SMeldiack Z550ALZO0 ConnectoJ _0 C Z550kL300 MaJnborad bracket...

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