LG RU-27FB30C Series Service Manual

Hide thumbs Also See for RU-27FB30C Series:

Advertisement

SERVICE MANUAL
SERVICE MANUAL
Product Type:
Chassis:
Manual Part #:
Model Line:
Product Year:
Printed in U.S.A.
Commercial Color TV
FC NARROW
3828VD0210A Rev A
H
2005
CONTENTS
General Information/Remote Controls................................
Installer's Menu ............................................................
Servicing/Trobleshooting ................................................
Model/Module Parts List .................................................
Exploded Views .............................................................
Schematics ...................................................................
Published by
Technical Publications
LG Electronics Corporation
P.O. Box 240007
Huntsville, Al 35824
Copyright
February 2005 by LG Electronics Corporation
©
Model Series:
RU-27FB30C
RU-27FB31C
1
2
3
4
5
6

Advertisement

Table of Contents
loading

Summary of Contents for LG RU-27FB30C Series

  • Page 1 General Information/Remote Controls........ Installer’s Menu ............Servicing/Trobleshooting ..........Model/Module Parts List ..........Exploded Views ............. Schematics ..............Published by Technical Publications LG Electronics Corporation P.O. Box 240007 Huntsville, Al 35824 Copyright February 2005 by LG Electronics Corporation © Printed in U.S.A.
  • Page 2: Important Safety Notice

    This Manual was prepared for use only by properly trained audio-visual service technicians. When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Electronics Corporation. All components should be replaced only with types identical to those in the original circuit and their physical location, wiring and lead dress must conform to original layout upon completion of repairs.
  • Page 3 If replacement of any of these components ·After discharging the CRT, connect a high impedance-high volt- are deemed necessary, it is important to use original type LG age meter to the CRT anode Electronics components. After replacement is made, confirm ·Remove jumper wire from RX3750.
  • Page 4: Table Of Contents

    TABLE OF CONTENTS SECTION 1....GENERAL INFO SECTION 4....MODEL PARTS PRODUCT SAFETY SERVICING GUIDELINES ....i~ii RU-27FB30C ............4-1 OVERVIEW ............1-1 Connections ............ 1-3 SECTION 5....DIAGRAMS REMOTE INFO ............1-4 SC652LG ........... 1-4 RU-27FB30C ............ 5-1 CLONE PROGRAMMER ..........1-5 QUICKSET II PROGRAMMER ........
  • Page 5: Overview

    OVERVIEW INTRODUCTION This manual covers the FC Narrow Chassis Comercial Sets. This chassis has stereo, surround, MPI, and component video ports. IC100 - IF, micro, audio, video, sync and sweep drive processing. And it is tied directly to the keyboard and the infrared detector.
  • Page 6 These cards SUPERPORT - MPI might contain one of the above features. LG Commercial Product receivers are now being adapted CONNECTION CENTER ON BACK OF TV to interact with other equipment. Prime examples of...
  • Page 7: Connections

    OVERVIEW (continued) CONNECTION CENTER ON BACK OF TV 4. COMPONENT INPUT The connection center on the rear of the TV allows for These jacks are for input connections to YPrPb (or YCrCb) Video equipment. connection of the viewing source. The diagrams list the use of each jack on the connection center.
  • Page 8: Sc652Lg

    REMOTE CONTROL FLASHBK (FLASHBACK) Returns to the last channel viewed. POWER POWER MUTE Turns TV On or Off Turns sound Off and On, while the picture remains. CC (CLOSED CAPTIONING) Press to access closed options. Press ENTER to exit.. CHANNEL (UP/DOWN) Scroll through available channels, VOLUME DOWN/UP and the Video Channel (Audio/Video...
  • Page 9: Quickset Ii Programmer

    LT2000 & LT2002 CLONE PROGRAMMER Note: A slowly flashing green light indicates there is a problem with communications between TV and programmer. In this case, check for damaged cable, poor contacts, or other connection Status Indicator problems. If the status indicator is red, the programmer batteries are low.
  • Page 10: Set Clone Clock From Tv

    LT2000 & 2002 CLONE PROGRAMMER Using the on-screen menu, select a memory or return to DISPLAY CLONE SETUP the main selection menu. Then press ON/OFF, POWER, or Select “DISPLAY CLONE SETUP”, and then press ON/OFF, ENTER to activate the selection. POWER or ENTER to begin the teaching process.
  • Page 11: User Menus

    USER MENUS SETUP MENU Select any other channels to be changed, and when fin- ished, press ENTER to close the menu. Press the Menu key on the Installer’s remote repeatedly so that the SETUP MENU appears on the screen CH LABELS (CHANNEL LABELS) Press the MENU key on the remote so that the SETUP SETUP MENU MENU reappears.
  • Page 12: Clock Set

    USER MENUS CLOCK SET Note: The clock must be set before for the Timers to function. Press MENU repeatedly to show the Setup menu. Use the The Off Timer can be used to turn the TV Off at the Up/Down Arrows to highlight Clock Set. present time.
  • Page 13: Degauss

    USER MENUS DEGAUSS • BASS: Adjusts the amount of Bass (Low frequency level in the sound. It has 15 steps (0 to 14). On the optional installer’s remote, press MENU repeat- edly until the Setup Menu appears. • TREBLE: Adjusts the amount of Treble (High frequency Press SELECT to highlight the Degauss Option on your level) in the sound.
  • Page 14: Overview

    USER MENUS OVERVIEW To ensure complete for all TV programs (movies and regu- VIDEO MENU lar TV shows), choose ratings from the Motion Picture Association of America (MPAA) Rating System chart and the TV Parental Guidelines Rating System chart (both shown in next page).
  • Page 15: On Screen Displays

    USER MENUS • To reset the password, use the installer’s remote control to deactivate the V-Chip in the Installer’s menu (#21). Exit out of the Installer’s Menu after deactivating the Parental Control. Then enter back in and reactive the V-Chip. With the PARENTAL CONTROL menu on-screen, use the CAPTION 1 IS ON Up Arrow to choose an option, such as CONTENT BLOCK.
  • Page 16 Not for children under age 17 under any circumstances. Strong sexual content. Hard Core Films Same as NC-17 rating. Note: LG Electronics Corporation is not liable for any program content that appears when using this rating system; as always, user discretion is advised. TV PARENTAL GUIDELINE RATING SYSTEM General Audiences Content not offensive to most viewers.
  • Page 17: Installers Menu

    INSTALLERS MENU INSTALLER’S MENU ADJUSTMENTS NOTE: When set to 1 (ON), the TV does not respond to ON/OFF commands from either the remote or the control Installer’s menu items can be accessed by using the panel, and the SLEEP TIMER is also nonfunctional. optional LP702 installer’s remote control.
  • Page 18 INSTALLERS MENU 7-I. START VOLUME Scan mode Characteristics This function allows the Installer to determine the initial Channel Up/Down keys volume level setting when the TV is turned ON. This Change channels only. feature is useful for an in-house information channel, Channel down below the since the TV would always select that Volume level when lowest channel (or channel...
  • Page 19 INSTALLERS MENU 23-I. CAPTION LOCK 35-I. SUP. PORT YUV Set to 1 to restore previous Caption On/Off state after Reserved for future use TV turns off. When set to 0, Captions are always off, when TV is initially turned on. 36-I.
  • Page 20 INSTALLERS MENU 49-I. DIS. AUDIO M. 1 = Red 4 = Blue 7 = White Set to 1 to disable the Audio menu. Audio menu will 2 = Green 5 = Violet not appear. Set to 0 to enable the Audio menu. 60-I.
  • Page 21 INSTALLERS MENU 6Time display. 80-I. UPN MSB-2 User programmable number, most significant byte-2 readable by M.P.I. command. 70-I. FOR. CH-T COL (Channel-Time Display Foreground Color) 0 = Black 3 = Yellow 6 = Cyan 81-I. UPN LSB 1 = Red 4 = Blue 7 = White User programmable number, least significant byte...
  • Page 22 INSTALLERS MENU 94-I. NOT USED 90-I. KEY LOCK When set to 1, frontal keyboard functionality is disabled. 95-I. AUDIO MD DISP When set to 1, Audio Mode Information is enabled to 91-I. NOT USED appear in the Channel Time Display. 92-I.
  • Page 23 INSTALLERS MENU Value Default Function Menu Item Range Value Brief Description of Function and Comments 40-I. AUTO CAMPORT 0 / 1 Set to 1 to automatically switch to Camport. 41-I. NOT USED 42-I. AUTO FRNT Y/C 0 / 1 Set to 1 to automatically switch to front S-Video input. 43-I.
  • Page 24 INSTALLERS MENU Default Function Menu Item Value Range Value Brief Description of Function and Comments 81-I. UPN LSB 0 - 255 User programmable number, least significant byte. (SN-LOW) 82-I. CHKSM ERROR 0 / 1 Enforces rigid M.P.I.* checksum Relaxes M.P.I. timing to be compatible with PC based Windows controlled 83-I.
  • Page 25: Factory Menu

    FACTORY MENU 13-F CRNL6 (Lower Corner(6 DEFLECTION 1 More detail adjusts until symmetries lower corner of the screen. 0-F VL (Vertical Linearity) Adjust so that the boundary line between upper and DEFLECTION 2 lower half is in accord with geometric horizontal center of the CPT.
  • Page 26 FACTORY MENU 42-F AGCADJ1 27-F TINT RF Manual AGC Adjust for ADC1. Range : 0 to 63. Internal Tint Control for RF input source. Range : -128 to 127. 43-F AGCADJ2 Manual AGC Adjust for ADC2. Range : 0 to 63. 28-F SCADJ Chroma Sub-Carrier adjust register.
  • Page 27 FACTORY MENU 74-F RF BLACK 58-F VSATADJ Brightness register to set the initial condition for Pr Chroma component saturation adjust. Range : 0 to Brightness final alignment. 75-F RF WHITE 59-F LPFOP Contrast register to set the initial condition for Lines per Field Output.Only used for Freerun Mode.
  • Page 28 INSTALLERS MENU 88-F ULBLK DIS 103-F HBSO Register to toggle between Black or ultrablack during Horizontal Blanking Stop. Range : 0 to 1295 Blanking. Range : 0,1. 104-F VBST 89-F PRED CH Vertical Blanking Start Line. Range : -127 to 343. Register to Choose the default channel during Predominant Color Adjustment.
  • Page 29 INSTALLERS MENU VIDEO-FI 8 115-F YCDEL YC Luminance Delay for Luminance/Chrominance Video input source. Range : -8 to 7. 129-F PKCF YC Peaking Filter Center Frequency for Luminance/ 116-F FIX G2 chrominance Video input source. Range : 0,1,2,3 Register to set the default value of Brigh(Luma Offset) register during G2 adjustment.
  • Page 30 INSTALLERS MENU Value ITEM Register Name Description (dec) Deflection 1 Vertical Linearity -280 Vertical Amplitude S-Correction Vertical Position Horizontal Position Horizontal Width Trapezoidal Pin Cushion CRNU Upper Corner CRNL Lower Corner ANGLE Angle CRNU6 Upper Corner(6 CRNL6 Lower Corner(6 EHTTH EHT Compensation Threshold Deflection 2 EHT S...
  • Page 31 INSTALLERS MENU Value ITEM Register Name Description (dec) RC YPBPR Red cutoff offset for YPbPr input Blue cutoff offset for YPbPr input BC YPBPR Green cutoff offset for YPbPr input GC YPBPR Video-FI 3 YPBPROFS Internal Brightness offset for YPbPr input YFDEL Luma/Fast blanking delay for YPbPr input UVDEL...
  • Page 32 INSTALLERS MENU Value ITEM Register Name Description (dec) NOOSDBCL BCL function for analog RGB. Register to enable or disable the BCL function for OSD HBST 1207 Horizontal Blanking Start. HBSO Horizontal Blanking Stop VBST Vertical Blanking Start Line. VBSO Vertical Blanking Stop Line OSD CNTR Analog Contrast for OSD and external RGB OSD BRT...
  • Page 33: Servicing

    GENERAL INFORMATION +14VSW at CX3660 +11VSW at ZDX3865 Servicing the FC Narrow is the same as with other LG +9VSW at CX3865 single-board chassis. If the set is dead, first check the standby and switched voltages. If the switched volt- +8VSW at ZDX3870 ages do not appear, check the power “On”...
  • Page 34: Shutdown Circuit Operation

    ICX3751 thresholds. If replacement of any of these compo- nents are deemed necessary, it is important to use original type LG Electronics components. After re- HV SHUTDOWN PROCEDURE. placement is made, confirm proper anode voltage ·After discharging the CRT, connect a high impedance- using the following procedure.
  • Page 35: If Servicing

    (U100) which is a band pass filter with sharp out band attenuation required to pre- a) With the LG remote control (P/N: 105-201M) to make vent adjacent channel disturbances going into the IF the next steps: amplifiers in the one chip IC.
  • Page 36: Adjustment Of Rgb Cutoff

    Factory Menu. IF VIDEO is switched internally on IC100. 2. With Zenith Remote (P/N MBR3447CT) or LG Remote (P/N MBR3447LG). Hold Menu button for just a sec Rear Y enters at pin 35 and C enter at pin 34 onds until channel will be displayed.
  • Page 37 SERVICING PURITY & CONVERGENCE SETUP PROCEDURE CONVERGENCE ADJUSTMENT PRELIMINARY SETUP 1. Release locking assembly. 1. Allow the receiver to warm up for 15 to 20 minutes. 2. Connect crosshatch generator to the receiver and 2. Degauss the CRT. adjust static (center) convergence as follows: 3.
  • Page 38 SERVICING VERTICAL-TILT WEDGE ADJUSTMENT IMPROVING CRT CORNER PURITY The vertical lines at 6 and 12 o’clock are converged by CRTs that display corner purity problems even after fol- vertically tilting the yoke and inserting a wedge at the lowing the service procedures can be modified with a top of the yoke until it is firmly seated between the CRT picture correction kit.
  • Page 39: Huntsville, Al

    6140VC2006D COIL,DEGAUSSING 6335V29020J CPT ASSEMBLY 120-C77G SPEAKER,FULLRANGE 6411VUH003A POWER CORD ASSEMBLY All LG Commercial Models are Module Level repair only. Parts contact information is below. Voice: 1-888-3-ZENITH Fax: 1-888-6-ZENITH Mail: ZENITH NATIONAL PARTS P O Box 240007 Huntsville, AL 35824-6407...
  • Page 40: Ru-27Fb30C

    RU-27FB30C Exploded View DESCRIPTION RU-27FB30C CABINET ASSEMBLY 3091V00746A SPEAKER, FULLRANGE 120-C77G CHASSIS ASSEMBLY KEYBOARD 3141VSNJ06A WINDOW 3790V00315A CPT ASSEMBLY (CRT) 6335V29020J BACK COVER ASSEMBLY 3809V00518A CHASSIS ASSEMBLY MAIN 3141VMNU33A FC NARROW SHEET 1 3828VD0210A...
  • Page 41: Microprocessor

    Microprocessor R 15 3 E / W H F L B S H T 4 S H T 4 10 0 V E R T + C 16 0 R 15 2 S H T 4 R 17 9 10 0 p F 2 7 K 2 .7 K 5 0 V...
  • Page 42: Audio

    Audio Luminance Chroma R R 8 8 0 0 1 1 1 1 K K R R 8 8 2 2 2 2 R R 8 8 2 2 4 4 I I C C 8 8 0 0 0 0 M M U U T T E E 8 8 0 0 3 3 S S H H T T 1 1...
  • Page 43: Power Supply

    Power Supply H O T S ID E C O L D S ID E C N 2 D E G K X 3 9 0 0 3 6 6 - 0 4 3 B 14 1- 0 18 E D G 12 D 1- O ( M ) 12 V T H X 3 9 0 0...
  • Page 44: Deflection

    Deflection IC 3 0 1 4 9 2 1V 0 0 2 3 1A + 14 0 IP M G P H 0 0 2 A V S W 4 9 2 0 V 0 0 0 8 2 C T D A 4 8 6 3 A R 3 12 WF15...
  • Page 45: Tilt

    Tilt + 14 + 14 V S W V S W C 5 0 1 C 5 0 0 R 5 0 7 R 5 0 0 0 .1 10 0 µ F 4 .7 K 4 .7 K 5 0 V 2 5 V Q 5 0 1 Q 5 0 4...
  • Page 46: Edge Card

    Edge Card Luminance C C O O N N 1 1 C C N N 1 1 E E 1 1 1 1 C C N N 1 1 V V G G A A 1 1 0 0 6 6 6 6 3 3 0 0 V V L L 0 0 2 2 7 7 1 1 1 1 6 6 6 6 3 3 0 0 V V L L 0 0 2 2 7 7 1 1 1 1 3 3 6 6 6 6 - - 9 9 2 2 2 2 J J + + 1 1 2 2 L L S S P P...
  • Page 47: Mpi Card

    MPI Card + 12 + 5 V C O N 11E 1 V S B S B F + 5 V S B F 6 6 3 0 V L0 2 8 11 + 12 V S B T P 1 R 4 9 9 5 10 K R 4 9 9 6...
  • Page 48: Video Output

    Video Output W5 10 0 9 7 1- 16 R 5 117 2 2 0 160V Q 5 10 1 C 5 114 R 5 115 0 T R 9 4 5 0 0 9 A A 1.5 K K S C 9 4 5 C - Y 15 0 p F + 2 0 0 V 5 0 V...
  • Page 49: Keyboard

    Keyboard V O LU M E C H A N N E L S W7 M E N U S W6 C LO S E D S W5 V O LU M E S W4 C H A N N E L S W3 S W2 M U T E...
  • Page 50: Ir Led Switch

    Ir Led Switch IR LE D P O WE R IN D IC A T O R LE D + 5 V LE D 1 4 9 3 0 V 0 0 0 4 8 A IR 1 10 µ H 3 3 0 S W8 14 0 - 3 15 A...
  • Page 51: Front Jack

    Front Jack JP 2 6 6 13 V 0 0 0 10 B S - V ID E O A U D IO A U D IO V ID E O LE F T R IG H T R 17 R 18 R 2 1 Composite Video...
  • Page 52: Pcb Layout Top

    PCB Layout Top C O L D H O T C O L D T H X 3 9 0 0 C O L D K X 3 9 0 0 H O T R 5 0 7 D X 3 9 0 0 D X 3 7 0 5 IC X 3 7 0 0 H O T...
  • Page 53: 2Nd Pcb Layout Top

    2nd PCB Layout Top CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X” IN THEIR ALL COMPONENTS WITH “M” IN THE DESIGNATOR 3828VD0210A FC NARROW SHEET 13 6-13 COMPONENTS DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED. ARE A SURFACE MOUNTED COMPONENT.

This manual is also suitable for:

Ru-27fb31c series

Table of Contents