Sharp 27C24 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 ................................................................................ 6

» CHASSIS LAYOUT ............................................................................................................................. 12

» BLOCK DIAGRAM .............................................................................................................................. 13

» SCHEMATIC DIAGRAMS ................................................................................................................... 14

» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 20

» REPLACEMENT PARTS LIST ............................................................................................................ 23

» PACKING OF THE SET ...................................................................................................................... 31

POWER INPUT .................................................... 120 V AC 60 Hz

POWER RATING .................................................................. 105 W

PICTURE SIZE ........................................... 2,187cm

CONVERGENCE ............................................................. Magnetic

SWEEP DEFLECTION .................................................... Magnetic

FOCUS ............................................... Hi-Bi-Potential Electrostatic

INTERMEDIATE FREQUENCIES

Picture IF Carrier Frequency ..................................... 45.75 MHz

Sound IF Carrier Frequency ...................................... 41.25 MHz

Color Sub-Carrier Frequency .................................... 42.17 MHz

AUDIO POWER

OUTPUT RATING ..................... 1.5W + 1.5W (at 10% distortion

SHARP CORPORATION

SERVICE MANUAL

MODELS

CONTENTS

ELECTRICAL SPECIFICATIONS

SPEAKER

(339sq inch)

ANTENNA INPUT IMPEDANCE

TUNING RANGES

(Nominal)

and Dual CH Operate)

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. C/D-BM

27C241

SIZE ............................................................... 9x5cm (Oval type)

VOICE COIL IMPEDANCE ............................ 32 ohm at 400 Hz

VHF/UHF ..................................................... 75 ohm Unbalanced

VHF-Channels ............................................................... 2 thru 13

UHF-Channels ............................................................ 14 thru 69

CATV Channels ........................................................... 1 thru 125

Specifications are subject to change without

prior notice.

27C241

Page

(EIA, Channel Plan U.S.A.)

Summary of Contents for Sharp 27C24

Page 1: Table Of Contents
AUDIO POWER prior notice. OUTPUT RATING ..... 1.5W + 1.5W (at 10% distortion and Dual CH Operate) This document has been published to be used for after sales service only. SHARP CORPORATION The contents are subject to change without notice.
Page 2: Important Service Safety Precaution
27C241 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 27C241 IMPORTANT SERVICE SAFETY PRECAUTION (Continued) • Connect the resistor connection to all exposed metal BEFORE RETURNING THE RECEIVER 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
27C241 LOCATION OF USER'S CONTROL (27C241) Front Panel VIDEO IN 2 L-AUDIO-R (VIDEO/AUDIO terminals are also provided on the rear.) POWER → Press → Press again Off. SENSOR AREA FOR CHANNEL UP/DOWN – MENU REMOTE CONTROL ( ) Selects next higher channel. VOLUME UP/DOWN ( ) Selects next lower channel.
Page 5: Installation And Service Instructions
27C241 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), High voltage is not adjustable but must be checked...
Page 6 27C241 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 adjusment is required. To enter the service mode and exit service mode.
Page 7 27C241 Below are the adjustments ranges and initial values for FIX VALUE category. FIX VALUE DATA SERVICE ADJUST ITEM INITIAL VALUE (Hex) POSITION RANGE OPTION 1 00-FF OPTION 2 00-FF E-SAVE 00-3F TUNER SETUP 00, 01 R-TONE RD 00-7F R-TONE BD 00-7F B-TONE RD 00-7F...
Page 8 27C241 SIGNAL DATA SERVICE ADJUST ITEM ADJUSTMENT CONTENTS POSITION RANGE INITIAL VALUE RF AGC 00-3F VIDEO LEVEL 00-07 Must be "4" "01": Y-MUTE, "02": V-STOP & Y-MUTE Y-MUTE 00-03 "03": Activate color killer circuit. SUB BIAS 00-FF Must be "30" R-BIAS 00-FF G-BIAS...
Page 9 27C241 Ë SERVICE ADJUSTMENT 7. Adjust the service adjustment "S05" red, "S06" green, Note: Before making the service adjustment, make the bus data settings. "S07" blue to obtain a good grey scale with normal +B Adjustment white at low brightness level. 8.
Page 10 27C241 Ë MTS ADJUSTMENT Vertical-Size, V-Linearity and V-S Correction Adjustments MTS Level Adjustment 1. Receive a good local channel. 1. Feed the following monaural signal to pin (14) of 2. Enter the service mode DEF category and select the IC3001. adjustment "D02"...
Page 11: Chassis Layout
27C241 CHASSIS LAYOUT...
Page 12: Block Diagram
27C241 BLOCK DIAGRAM...
Page 13 27C241 DESCRIPTION OF SCHEMATIC DIAGRAM WAVEFORM MEASUREMENT CONDITIONS: NOTES: 1. Photographs taken on a standard gated color bar 1. The unit of resistance "ohm" is omitted. Ω Ω Ω signal, the tint setting adjusted for proper color. The (K=k =1000 , M=M wave shapes at the red, green and blue cathodes of 2.
Page 14 27C241 SCHEMATIC DIAGRAM: MAIN-1 Unit...
Page 15 27C241...
Page 16 27C241 SCHEMATIC DIAGRAM: MAIN-1 Unit...
Page 17 27C241...
Page 18 27C241 SCHEMATIC DIAGRAM: CRT Unit...
Page 19: Printed Wiring Board Assemblies
27C241 PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN Unit (Wiring Side)
Page 20 27C241 PWB-A: MAIN Unit (Chip Parts Side)
Page 21 27C241 PWB-B: CRT Unit (Wiring Side)
Page 22 IX3528CE IC2040 VHIPST994C/-1+ PST994C in USA: Contact your nearest SHARP Parts Distributor to order. IC2101 VHICAT24W16-1 CAT24W16P For location of SHARP Parts Distributor, Please call Toll- IC3001 VHICXA2194Q-1Y CXA2194Q Free; 1-800-BE-SHARP IC3371 VHIAN7511//-1 AN7511 « MARK: SPARE PARTS-DELIVERY SECTION TRANSISTORS...
Page 23 27C241 « « Description Ref. No. Part No. Description Code Ref. No. Part No. Code C356 VCKYCY1HB332KY 3300p 50V Ceramic PWB-A: DUNTKA462WEA0 C357 VCEA0A1HW106M+ MAIN UNIT C358 VCEA0A1HW106M+ C361 VCEA0A1CW477M+ C401 VCCCCY1HH470JY Ceramic DIODES C411 VCEA0A1AW108M+ 1000 D708 VHD1SS119//-1Y Diode C412 VCKYCY1HF103ZY 0.01...
Page 24 27C241 « Description « Description Ref. No. Part No. Code Ref. No. Part No. Code VRS-CY1JF000JY 1/16W M-Ox. PWB-A: DUNTKC290WEA4 VRS-CY1JF000JY 1/16W M-Ox. VRS-CY1JF000JY 1/16W M-Ox. MAIN UNIT VRS-CY1JF000JY 1/16W M-Ox. RJ10 VRS-CY1JF000JY 1/16W M-Ox. CAPACITORS RJ11 VRS-CY1JF000JY 1/16W M-Ox. [EL.···...
Page 25 27C241 Ref. No. Part No. « Description Code Ref. No. Part No. « Description Code R746 VRS-CY1JF562JY 5.6k 1/16W M-Ox. PWB-A: DUNTKA462WEA0 R747 VRS-CY1JF682JY 6.8k 1/16W M-Ox. R752 VRD-RA2BE392JY 3.9k 1/8W Carbon MAIN UNIT U R758 VRS-RG2HC100J+ 1/2W M-Ox. R762 VRS-CY1JF103JY 1/16W M-Ox.
Page 26 27C241 « Description Ref. No. Part No. Code Ref. No. Part No. « Description Code MISCELLANEOUS PARTS PWB-A: DUNTKA462WEA0 RY701 RRLYJ0081CEZZ Relay MAIN UNIT F701 QFS-B4023CEZZ FUSE - 4A 125V FB601 RBLN-0047CEZZY FERRITE BEAD RESISTORS FH701 QFSHD1013CEZZ+ FUSE CLIP [M-Ox.··· Metal Oxide, M-Film ··· Metal Film] FH702 QFSHD1014CEZZ+ FUSE CLIP...
Page 27 QCNW-0134MEZZ WIRE SPEAKER Not Available — Front Cabinet — QCNW-0166MEZZ WIRE (GBN) GCOVA0112GJKA RC/LED Cover QCNW-0167MEZZ WIRE (YBN) HBDGB1009MESB BADGE (SHARP PLASTIC) AC TCAUH3045GJZZ caution card JBTN-0130GJKB Power button TLABN0101GJZZ Remark label(chassis ID) JBTN-0131GJSB Button, CH-Up/Down, VSP9050PB40YA speaker VOL-Up/Down, Menu...
Page 28: Packing Of The Set
27C241 PACKING OF THE SET Polyethylene Bag Operation Manual Infrared R/C unit Batteries Polyethylene Mat Buffer Material 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. MARK : Not replacement items.
Page 29 QRC0016-U March. 2004 Modify : SEMEX Design and Production Information SHARP ELECTRONICA MEXICO S. A. DE C. V. Design : SEM Quality & Reliability Control Center Production : SEMEX Blvd. SHARP No. 3510 Parque Industrial Rosarito...

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Sharp 27C24 Service Manual

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