Sharp 27SC260R Service Manual
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Sharp 27SC260R Service Manual

Sharp 27SC260R Service Manual

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In the interests of user-safety (Required by safety regulations in some countries ) the set should be restored to its
original condition and only parts identical to those specified should be used.
» ELECTRICAL SPECIFICATIONS ......................................................................................................... 1
» IMPORTANT SERVICE SAFETY PRECAUTION ................................................................................. 2
» LOCATION OF USER'S CONTROL ..................................................................................................... 4
» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................ 5
» SERVICE ADJUSTMENT ..................................................................................................................... 9
» CHASSIS LAYOUT ............................................................................................................................. 12
» BLOCK DIAGRAM .............................................................................................................................. 13
» DESCRIPTION OF SCHEMATIC DIAGRAMS & WAVEFORMS ........................................................14
» SCHEMATIC DIAGRAMS ................................................................................................................... 15
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 22
» PARTS LIST ........................................................................................................................................ 27
» PACKING OF THE SET ...................................................................................................................... 36
POWER INPUT ..................................................... 120V AC, 60 Hz
POWER RATING ................................................................... 130W
PICTURE SIZE .......................................... 2,187 cm
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS ............................................... Hi-Bi-Potential Electrostatic
INTERMEDIATE FREQUENCIES
Picture IF Carrier Frequency ...... 45.75 MHz (Analog Terrestrial)
Sound IF Carrier Frequency....... 41.25 MHz (Analog Terrestrial)
Color Sub-Carrier Frequency ..... 42.17 MHz (Analog Terrestrial)
IF Center Frequency ........................ 44 MHz (Digital Terrestrial)
AUDIO POWER
OUTPUT RATING .............. 3.0W + 3.0W (at 10% distortion and
SHARP CORPORATION
SERVICE MANUAL
MODEL
CONTENTS

ELECTRICAL SPECIFICATIONS

SPEAKER
SIZE .......................................................... 9 x 5 cm oval (2 pcs.)
2
(339sq inch)
VOICE COIL IMPEDANCE ............................ 16 ohm at 400 Hz
ANTENNA INPUT IMPEDANCE
VHF/UHF ..................................................... 75 ohm Unbalanced
TUNING RANGES
VHF-Channels ............................................................... 2 thru 13
UHF-Channels ............................................................ 14 thru 69
CATV Channels ........................................................... 1 thru 125
Digital Terrestrial Broadcast (VHF/UHF) .......................2 thru 69
(Nominal)
Specifications are subject to change without
Dual CH Operate)
prior notice.
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
COLOR TELEVISION
Chassis No. GB-3D(1W)
27SC260R
(EIA, Channel Plan U.S.A.)
27SC260R
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  • Page 1: Table Of Contents

    27SC260R SERVICE MANUAL COLOR TELEVISION Chassis No. GB-3D(1W) 27SC260R MODEL In the interests of user-safety (Required by safety regulations in some countries ) the set should be restored to its original condition and only parts identical to those specified should be used.

  • Page 2: Important Service Safety Precaution

    27SC260R IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow: WARNING X-RADIATION AND HIGH VOLTAGE LIMITS 1. For continued safety, no modification of any circuit 1.
  • Page 3 27SC260R IMPORTANT SERVICE SAFETY PRECAUTION (Continued) BEFORE RETURNING THE RECEIVER • Connect the resistor connection to all exposed metal parts having a return to the chassis (antenna, metal (Fire & Shock Hazard) cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop Before returning the receiver to the user, perform across the resistor.

  • Page 4: Location Of User's Control

    27SC260R LOCATION OF USER'S CONTROL Front Panel POWER VIDEO/AUDIO IN 2 Press TERMINALS Press again Off. REMOTE CONTROL SENSOR CHANNEL UP/DOWN MENU ( ) Selects next higher channel. Press Accesses MAIN MENU. VOLUME UP/DOWN ( ) Selects next lower channel.

  • Page 5: Installation And Service Instructions

    27SC260R INSTALLATION AND SERVICE INSTRUCTIONS Note: (1) When performing any adjustments to resistor controls and transformers use non-metallic screwdrivers or TV alignment tools. (2) Before performing adjustments, the TV set must be on at least 15 minutes. HIGH VOLTAGE CHECK CIRCUIT PROTECTION The receiver is protected by a 4.0A fuse (F701),...
  • Page 6 27SC260R For adjustments of this model, the bus data is converted to various analog signals by the D/A converter circuit. Note: There are still a few analog adjustments in this series such as focus and master screen voltage. Follow the steps below whenever the service adjustment is required. See "Table-B" to determine, if serv- ice adjustments are required.
  • Page 7 TINT-S 0-127 (00h-7Fh) 62 (3Eh) S-Terminal Input C-TRAP 0-1 (00h-01h) 00 (00h) AUTO FRESH 0-1 (00h-01h) 00 (00h) SHARP P F 0-1 (00h-01h) 01 (01h) CD MATRIX 0-3 (00h-03h) 02 (02h) B-Y ATT 0-1 (00h-01h) 00 (00h) R-Y ATT 0-1 (00h-01h)
  • Page 8 27SC260R DATA SERVICE NOTES FIXED VALUE ADJUSTMENT ITEM NUMBER RANGE (HEX) INITIAL VALUE V POSITION 0-7 (00h-07h) 00 (00h) H POSITION 0-31 (00h-1Fh) 18 (12h) V SIZE 0-127 (00h-7Fh) 46 ( H SIZE 0-63 (00h-3Fh) V-LINEARITY 0-15 (00h-0Fh) 08 (08h)

  • Page 9: Service Adjustment

    27SC260R Holding down both the VOL-up and CH-up buttons on the TV set at service mode for more than 2 seconds will automatically write the above initial values into IC2101. ADJUSTMENT PART REPLACED NOTES NECESSARY UNNECESSARY IC2001 Data is stored in IC2101.
  • Page 10 27SC260R Sub-Tint Adjustment 2. Enter the service mode and select the service adjustment "D03" for V-size. 1. Receive the half color bar signal. 3. Adjust the "D03" bus data to get the proper V-size. • RF INPUT (TU1101) 4. For V-linearity adjustment, select data bus "D05" and 2.
  • Page 11 27SC260R Ë MTS ADJUSTMENT MTS Level Adjustment 1. Set the sound volume above 1. Monoral signal: 400Hz, 100% modulation 2. Confirm "EX4" data is "5Ah". 3. Vary the "M01" bus data until the voltage to pin (39) of IC3001 to become the value as stated below.

  • Page 12: Chassis Layout

    27SC260R CHASSIS LAYOUT...

  • Page 13: Block Diagram

    27SC260R BLOCK DIAGRAM...

  • Page 14: Description Of Schematic Diagrams & Waveforms

    27SC260R DESCRIPTION OF SCHEMATIC DIAGRAMS WAVEFORM MEASUREMENT CONDITIONS: NOTES: 1. Photographs taken on a standard gated color bar 1. The unit of resistance "ohm" is omitted. signal, the tint setting adjusted for proper color. The (K=kW=1000W, M=MW) wave shapes at the red, green and blue cathodes of 2.

  • Page 15: Schematic Diagrams

    27SC260R SCHEMATIC DIAGRAM: CRT Unit A68AGA20X105...
  • Page 16 27SC260R SCHEMATIC DIAGRAM: MAIN-1 Unit QPWBFD571WJN3...
  • Page 17 27SC260R...
  • Page 18 27SC260R SCHEMATIC DIAGRAM: MAIN-1 Unit JA108WJ JA108WJ...
  • Page 19 27SC260R JA108WJ JA108WJ...
  • Page 20 27SC260R PWB-D: 2-LINE Y/C Unit...
  • Page 21 27SC260R...

  • Page 22: Printed Wiring Board Assemblies

    27SC260R PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN Unit (Wiring Components Side)
  • Page 23 27SC260R...
  • Page 24 27SC260R PWB-A: MAIN Unit (Components side)
  • Page 25 27SC260R...
  • Page 26 27SC260R PWB-B: CRT Unit (Wiring Side) PWB-D: 2-LINE Y/C Unit (Wiring Side) PWB-D: 2-LINE Y/C Unit (Chip Parts Side)

  • Page 27: Parts List

    IC1101 VHIPQ1CZ41H-1Y PQ1CZ41H2ZPH IC1102 VHIBA00BC0W-1S BA00BC0WT-V5 in USA: Contact your nearest SHARP Parts Distributor to order. IC1103 VHINJ2584AM-1Y NJ2584AM For location of SHARP Parts Distributor, Please call Toll- IC1104 VHIBA00BC0W-1S BA00BC0WT-V5 Free; 1-800-BE-SHARP IC1403 VHIPQ05RDA1-1 PQ050RDA1SZ IC2001 RH-IXB644WJQ2Q TMP88CS38BFG « MARK: SPARE PARTS-DELIVERY SECTION...
  • Page 28 27SC260R Ref. No. Part No. Description Code Ref. No. Part No. Description Code PACKAGED CIRCUITS PWB-A: DUNTKD571WEB5 TH501 RH-HZ0004GEZZ+ X Thermistor MAIN UNIT VA701 RH-VXA009WJZZ X VARISTOR U PR701 RMPTP0092CEZZ X Packaged Circuit DIODES X801 RCRSAA010WJZZ X Crystal D412 RH-EX0614GEZZY Zener Diode 5.6V AB...
  • Page 29 27SC260R Ref. No. Part No. Description Code Ref. No. Part No. Description Code U C725 RC-EZA064WJZZ 160V PWB-A: DUNTKD571WEB5 C726 RC-KZ0226CEZZ+ 560p Ceramic AB C727 RC-KZ0226CEZZ+ 560p Ceramic AB MAIN UNIT C729 VCEA0A1HW106M+ X C730 VCEA0A1VW108M+ X 1000 CAPACITORS [EL.··· Electrolytic, M-Poly.··· Metalized Polypro Film]...
  • Page 30 27SC260R Ref. No. Part No. Description Code Ref. No. Part No. Description Code C3013 VCKYCY1HB272KY 2700p Ceramic AA PWB-A: DUNTKD571WEB5 C3014 VCKYCY1CB473KY 0.047 Ceramic AA C3015 VCEACA1HC335K+ MAIN UNIT C3016 VCE9GA1HW475M+ X C3017 VCEACA1CC106K+ CAPACITORS [EL.··· Electrolytic, M-Poly.··· Metalized Polypro Film]...
  • Page 31 27SC260R Ref. No. Part No. Description Code Ref. No. Part No. Description Code R624 VRS-RG3DB332J+ 3.3k M-Ox. PWB-A: DUNTKD571WEB6 R625 VRD-RA2BE102JY 1/8W Carbon R627 VRN-RL3ABR47J+ M-Film MAIN UNIT R628 VRN-RL3ABR47J+ M-Film R651 VRS-RG2HC270J+ 1/2W M-Ox. RESISTORS R652 VRD-RA2EE103GY 1/4W Carbon [M-Ox.···...
  • Page 32 27SC260R Ref. No. Part No. Description Code Ref. No. Part No. Description Code R968 VRS-CY1JF102JY 1/16W M-Ox. PWB-A: DUNTKD571WEB5 R969 VRS-CY1JF472FY 4.7k 1/16W M-Ox. R970 VRD-RA2BE6R8JY 1/8W Carbon MAIN UNIT R971 VRS-CY1JF101JY 1/16W M-Ox. R972 VRS-CY1JF101JY 1/16W M-Ox. RESISTORS R973...
  • Page 33 27SC260R Ref. No. Part No. Description Code Ref. No. Part No. Description Code R3033 VRS-CY1JF474JY 470k 1/16W M-Ox. PWB-A: DUNTKD571WEB5 R3034 VRS-CY1JF000JY 1/16W M-Ox. R3035 VRS-CY1JF102JY 1/16W M-Ox. MAIN UNIT R3036 VRS-CY1JF102JY 1/16W M-Ox. R3037 VRS-CY1JF153JY 1/16W M-Ox. RESISTORS [M-Ox.··· Metal Oxide, M-Film ··· Metal Film]...
  • Page 34 27SC260R Ref. No. Part No. Description Code Ref. No. Part No. Description Code R899 VRD-RA2BE222JY 2.2k 1/8W Carbon PWB-B: DUNTKB568WEV0 MISCELLANEOUS PARTS CRT UNIT P860 QPLGN0441CEZZ Plug 4Pin(RAV) P880 QPLGN0641CEZZ Plug (6 Pins) SC850 QSOCV0937CEZZ CRT Socket DIODES D891 VHD1SS119//-1Y...
  • Page 35 Wire (BLACK 80MM+) CABINET PARTS SUPPLIED ACCESSORIES 1 CCABAB574WEH0 Front Cabinet Assembly 1-1 Not Available — Front Cabinet — 1-2 HBDGB1009MESB BADGE (SHARP PLASTIC) RRMCGA450WJSA Infrared Remote Control Unit AM 1-3 GCOVA0121GJSA RC/LED Cover TINS-C268WJZZ Operation Manual 1-4 JBTN-0138GJKG Button, Power...

  • Page 36: Packing Of The Set

    27SC260R PACKING OF THE SET Polyethylene Bag ACCESSORIES Polyethylene Mat Packing Foam FRONT Packing Case Use tape to fix the top side of packing case. REAR Use 12 staples to fix the bottom side of packing case.
  • Page 37 27SC260R...
  • Page 38 QRC0030-U November. 2006 Modify : SEMEX Design and Production Information SHARP ELECTRONICA MEXICO S. A. DE C. V. Design base : SEM Quality & Reliability Control Center Production : SEMEX Blvd. SHARP No. 3510 Parque Industrial Rosarito...

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