Sharp 19C140 - 19" CRT TV Service Manual

Service manual

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

» CHASSIS LAYOUT ............................................................................................................................ 10

» BLOCK DIAGRAM ............................................................................................................................. 11

» SCHEMATIC DIAGRAMS .................................................................................................................. 12

» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 15

» REPLACEMENT PARTS LIST ........................................................................................................... 18

» PACKING OF THE SET ..................................................................................................................... 23

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

POWER RATING ............................................. 69 W

PICTURE SIZE ....................... 1,194cm

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

SHARP CORPORATION

SERVICE MANUAL

COLOR TELEVISION

MODELS

CONTENTS

ELECTRICAL SPECIFICATIONS

AUDIO POWER

OUTPUT RATING ........... 1.0 W (at 10% distortion)

SPEAKER

(185sq inch)

SIZE .................................................. 8 cm (Round)

VOICE COIL IMPEDANCE ........... 8 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

(Nominal)

Specifications are subject to change without

prior notice.

This document has been published to be used for after

sales service only.

The contents are subject to change without notice.

Chassis No. CD-A

19C140

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

19C140

Page

Table of Contents

Summary of Contents for Sharp 19C140 - 19" CRT TV

Page 1: Table Of Contents
Color Sub-Carrier Frequency ....42.17 MHz (EIA, Channel Plan U.S.A.) (Nominal) Specifications are subject to change without prior notice. 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
19C140 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 19C140 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 and etc.) and measure the AC voltage Before returning the receiver to the user, perform drop across the resistor.
Page 4: Location Of User's Control
19C140 LOCATION OF USER'S CONTROL...
Page 5: Installation And Service Instructions
19C140 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 19C140 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 19C140 DATA SERVICE ADJUSTMENT ITEM ADJUSTMENT CONTENTS NUMBER RANGE INITIAL VALUE PICTURE 00-7F TINT 00-7F COLOR 00-7F BRIGHTNESS 00-7F SHARPNESS 00-3F Must be set to "24" VERTICAL PHASE 00-07 Must be set to "00" ~ "03" HORIZONTAL PHASE 00-1F RF-AGC 00-3F VERTICAL AMP 00-3F...
Page 8 19C140 Ë SERVICE ADJUSTMENT VCO Adjustment White Balance Adjustment 1. Connect a digital voltmeter between pin (44) of IC201 1. Receive a good local channel. and ground. 2. Enter the service mode and select the service 2. Receive a good local channel. adjustment "S03"...
Page 9 19C140 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. 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 10: Chassis Layout
19C140 CHASSIS LAYOUT NORMAL PR701 C708...
Page 11: Block Diagram
19C140 BLOCK DIAGRAM...
Page 12: Schematic Diagrams
19C140 SCHEMATIC DIAGRAM: MAIN-1 Unit...
Page 13 19C140...
Page 14 19C140 SCHEMATIC DIAGRAM: CRT Unit...
Page 15: Printed Wiring Board Assemblies
19C140 PRINTED WIRING BOARD ASSEMBLIES P WB -A: MAIN Unit (Wiring S ide)
Page 16 19C140 PWB-A: MAIN Unit (Chip Parts Side)
Page 17 19C140 PWB-B: CRT Unit (Wiring Side) PWB-B: CRT Unit (Chip Parts Side)
Page 18: Replacement Parts List
X 2SC945AQ Q201 VS2SC2735//1EY X 2SC2735 in USA: Contact your nearest SHARP Parts Distributor to order. Q451 VS2SA1530R/-1Y X 2SA1530R For location of SHARP Parts Distributor, Please call Toll- Q452 VS2SA1266-Y-1+ X 2SA1266(Y) Free; 1-800-BE-SHARP Q601 VS2SC2482//-1+ X 2SC2482 Q602...
Page 19 19C140 Ref. No. Part No. « Description Code « Description Ref. No. Part No. Code C706 RC-KZ0092GEZZA X 3300p AC250V Ceramic PWB-A: DUNTKA358WEX9 C717 VCKYPA2HB472K+ X 4700p 500V Ceramic C723 RC-EZ0638CEZZ X 33 160V MAIN UNIT (Continued) C725 RC-EZ0724CEZZ X 100 160V C726 VCKYPH3DB561K...
Page 20 19C140 Ref. No. Part No. « Description Code « Description Ref. No. Part No. Code PWB-A: DUNTKA358WEX9 R653 VRS-CY1JF000JY 1/16W M-Ox. R654 VRD-RA2BE154JY 150k 1/8W Carbon MAIN UNIT R655 VRS-CY1JF103JY 1/16W M-Ox. R659 VRN-RL3AB3R3J+ M-Film RESISTORS R661 VRN-RL3ABR47J+ 0.47 M-Film R662 VRD-RA2BE102GY 1.0k...
Page 21 19C140 « Description « Description Ref. No. Part No. Code Ref. No. Part No. Code JACK PWB-A: DUNTKA358WEX9 J903 QJAKE0211CE09 RCA JACK WHITE MAIN UNIT (Continued) J905 QJAKE0211CE04 RCA JACK YELLOW Plug RESISTORS (Continued) P302 QPLGN0261CEZZ Plug (2 ) PINS P401 QPLGN0561CEZZA Plug 5Pin...
Page 22 19C140 « Description « Description Ref. No. Part No. Code Ref. No. Part No. Code PACKING PARTS MISCELLANEOUS PARTS (NOT REPLACEMENT ITEM) SPAKCB315WJZZ PACKING CASE — SPAKP0102GJZZ LAMIFOAM ACC701 QACCDA015WJPZ X AC-CORD SPAKX0003GJZZ PACKING FOAM VSP0080PBL4YS SPEAKER 32ohm 2W SSAKA0101GJZZ PLASTIC BAG QCNW-2111PEZZ WIRE (YBN)
Page 23: Packing Of The Set
19C140 PACKING OF THE SET Polyethylene Bag Operation Manual Infrared R/C Unit Batteries Wrapping Paper Buffer Material FRONT Packing Case Use tape to fix the top side of packing case. REAR Use 10 staples to fix the bottom side of packing case. MARK : Not replacement items.
Page 24 QRC0005-L Feb. 2004 Modify : SEMEX Design and Production Information Design base : JAPAN SHARP ELECTRONICA MEXICO S. A. DE C. V. Production : SEMEX Quality & Reliability Control Center Blvd. SHARP No. 3510 Parque Industrial Rosarito Playas de Rosarito, México B. C. 22710...

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Sharp 19C140 - 19" CRT TV Service Manual

Table of Contents

ELECTRICAL SPECIFICATIONS

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Summary of Contents for Sharp 19C140 - 19" CRT TV

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