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LG RT-17FB70V Service Manual

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All manuals and user guides at all-guides.com
COLOR TV
SERVICE MANUAL
CHASSIS : MC-019A
MODEL : RT-17FB70V
MODEL :
RT-21FB70RN/RQ/RX/V/VX
MODEL :
RT-21FB700VX
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

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  • Page 1 All manuals and user guides at all-guides.com website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html COLOR TV SERVICE MANUAL CHASSIS : MC-019A MODEL : RT-17FB70V MODEL : RT-21FB70RN/RQ/RX/V/VX MODEL : RT-21FB700VX CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    All manuals and user guides at all-guides.com CONTENTS CONTENTS ....................2 SAFETY PRECAUTIONS ................3 SERVICING PRECAUTIONS ..............4 SPECIFICATIONS ..................6 DESCRIPTION OF CONTROLS .............. 7 ADJUSTMENT ..................10 PURITY & CONVERGENCE ADJUSTMENT ..........13 BLOCK DIAGRAM ...................16 EXPLODED VIEW .................. 18 EXPLODED VIEW PARTS LIST ..............19 REPLACEMENT PARTS LIST ...............

  • Page 3: Safety Precautions

    All manuals and user guides at all-guides.com SAFETY PRECAUTIONS IMPORT ANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by the Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.

  • Page 4: Servicing Precautions

    All manuals and user guides at all-guides.com SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service transistors and semicounductor "chip" components. The manual and its supplements and addenda, read and follow the following techniques should be used to help reduce the SAFETY PRECAUTIONS on page 3 of this publication.
  • Page 5 All manuals and user guides at all-guides.com c. Qulckly move the soldering iron tip to the junction of the Fuse and Conventional Resistor component lead and the printed circuit foil, and hold it Removal/Replacement there only until the solder flows onto and around both the 1.

  • Page 6: Specifications

    All manuals and user guides at all-guides.com SPECIFICA TIONS Note : Specification and others are subject to change without notice for improvement. Video input system: PAL-B/G, D/K, I/I SOUND IF : 33.4MHz (B/G) SECAM-B/G, D/K,L/L’ 32.9MHz (I/I) NTSC M 32.4MHz (D/K) NTSC 4.43 34.4MHz (M) Intermediate Frequency (Unit : MHz)

  • Page 7: Description Of Controls

    All manuals and user guides at all-guides.com DECRIPTION OF CONTROLS All the functions can be controlled with the remote control handset. Some functions can also be adjusted with the buttons on the front panel of the set. Remote control handset Before you use the remote control handset, please install the bat- teries.
  • Page 8 All manuals and user guides at all-guides.com 10. MUTE switches the sound on or off. 11. TV/AV selects TV or AV mode. clears the menu from the screen. switches the set on from standby. 12. I/II/ (option) selects the language during dual language broadcast. (option) selects the sound output.
  • Page 9 All manuals and user guides at all-guides.com Front panel RF/RT-21FB70 series Side panel 1. MAIN POWER (ON/OFF) switches the set on or off. 2. POWER/STANDBY INDICATOR illuminates brightly when the set is in standby mode. dims when the set is switched on. blinks when signal is input from the remote control.

  • Page 10: Adjustment

    All manuals and user guides at all-guides.com ADJUSTMENT Safety Precautions Option Code Function Remark 1. It is safe to adjust after using insulating transformer W/O TBS between the power supply line and chassis input to WITH TBS prevent the risk of electric shock and protect the instrument.
  • Page 11 Table below. 5) Press the OK( ) button to memorize the data. Status Initial Data Remark 6700VPF009G Tuner P/N 6700VPF016A LG Innotek(W/S TUNER) Marker DAEWOO(W/S TUNER) 2.7! 0.05V AGC Voltage 2.7! 0.05V 6700VPF009S Tuner P/N BLO-R...
  • Page 12 2. Deflection Initial Setup Data Status Default 21" FLAT S/S 21" FLAT LG 3. Deflection Adjustment Procedure VL (Vertical Linearity) Adjust so that the boundary line between upper and lower half is in accord with geometric horizontal center of the CPT.

  • Page 13: Purity & Convergence Adjustment

    All manuals and user guides at all-guides.com PURITY & CONVERGENCE ADJUSTMENT Caution: 5. Reconnect the internal degaussing coil. Convergence and Purity have been factory aligned. Do not attempt to tamper with these alignments. 6. Position the beam bender locking rings at the 9 o'clock However, the effects of adjacent receiver components, or position and the other three pairs of tabs (2,4 and 6 pole replacement of picture tube or deflection yoke may require the...
  • Page 14 All manuals and user guides at all-guides.com 1.ADJUST YOKE Z-AXIS FIRST 2 .ADJUST BEAM BENDER 2 POLE TO GET EQUAL BLUE MAGNET TO GET FOUR EQUAL COLOR CIRCLES COLOR CIRCLES MAGNETS 8. Referring to above, perform the following two steps: 6.
  • Page 15 All manuals and user guides at all-guides.com ROTATION DIRECTION RING MOVEMENT OF RED OF BOTH TABS PAIRS AND BLUE BEAMS OPPOSITE POLE SAME OPPOSITE POLE SAME UP/DOWN ROCKING OF THE YOKE LEFT/RIGHT ROCKING OF THE YOKE UP/DOWN ROCKING OF THE YOKE LEET/RIGHT ROCKING OF THE YOKE CAUSES OPPOSITE ROTATION OF RED CAUSES OPPOSITE SIZE CHANGE OF THE...

  • Page 16: Block Diagram

    All manuals and user guides at all-guides.com BLOCK DIAGRAM - 16 -...
  • Page 17 All manuals and user guides at all-guides.com MEMO - 17 -...

  • Page 18: Exploded View

    All manuals and user guides at all-guides.com EXPLODED VIEW - 18 -...

  • Page 19: Exploded View Parts List

    All manuals and user guides at all-guides.com The components identified by mark critical for safety. EXPLODED VIEW PARTS LIST Replace only with part number specified. PARTS No. LOCA. NO DESCRIPTIONS 17Ó 21Ó 6334V17001A 6334V21004B 2426GDB30CA CPT SET, A51QDJ279X(PB) 00Q7NP FREE,BARE 120-C77M 120-C77M SPEAKER,FULLRANGE ESTEC 8 OHM 10/15W 130DB 57*117MM...

  • Page 20: Replacement Parts List

    All manuals and user guides at all-guides.com The components identified by mark critical for safety. REPLACEMENT PARTS LIST Replace only with part number specified. LOCA. NO PART NO DESCRIPTION LOCA. NO PART NO DESCRIPTION D903 0DR210009AC DIODE, TP DO35 200V 0.2A 1A 50SEC 100A D904 0DR140049AC DIODE, 1N4004A DO41 500V 1.0A 30A - 10UA...
  • Page 21 All manuals and user guides at all-guides.com The components identified by mark For Capacitor & Resistors, CC, CX, CK, CN : Ceramic RD : Carbon Film the charactors at 2nd and 3rd CQ : Polyestor RS : Metal Oxide Film critical for safety.
  • Page 22 220 OHM 1/6 W 5.00% TA52 CONNECTOR R121 0RD1001F609 1K OHM 1/6 W 5% TA52 P02A 366-932B CONNECTOR, 2.5MM 3P GIL-G LG CABLE S R122 0RD1001F609 1K OHM 1/6 W 5% TA52 P05A 366-921J CONNECTOR, 2.5MM 10P GIL-G LG CABLE .
  • Page 23 LOCA. NO PART NO DESCRIPTION R542 0RD1002F609 10K OHM 1/6 W 5% TA52 SW04 140-315A SWITCH, TACT SKHV17910B LG C&D NON 12V R551 0RD2200F609 220 OHM 1/6 W 5.00% TA52 SW05 140-315A SWITCH, TACT SKHV17910B LG C&D NON 12V R552 0RD2200F609 220 OHM 1/6 W 5.00% TA52...
  • Page 24 All manuals and user guides at all-guides.com...
  • Page 25 All manuals and user guides at all-guides.com...
  • Page 26 All manuals and user guides at all-guides.com Apr.,2004 P/NO : 3828VD0126V Printed in Korea...

This manual is also suitable for:

Rt-21fb70rnRt-21fb70rqRt-21fb70rxRt-21fb70vRt-21fb70vxRt-21fb700vx

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