Sharp 27SC26BQ Service Manual

Color tv

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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 ..................................................................................................... 5

» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................ 6

» SERVICE ADJUSTMENT ................................................................................................................... 13

» CHASSIS LAYOUT ............................................................................................................................. 16

» BLOCK DIAGRAM .............................................................................................................................. 17

» DESCRIPTION OF SCHEMATIC DIAGRAMS & WAVEFORMS ........................................................ 18

» SCHEMATIC DIAGRAMS ................................................................................................................... 19

» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 26

» PARTS LIST ........................................................................................................................................ 31

» PACKING OF THE SET ...................................................................................................................... 40

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

POWER RATING .................................................................. 110W

PICTURE SIZE ....................................... 2,193.5 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

SERVICE MANUAL

MODEL

CONTENTS

ELECTRICAL SPECIFICATIONS

SPEAKER

SIZE .......................................................... 12 x 6 cm oval (2 pcs.)

(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 (Analog)

CATV Channels ............................................. 1 thru 135 (Digital)

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-D7

27SC26BQ

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

27SC26BQ

Page

Table of Contents

Summary of Contents for Sharp 27SC26BQ

Page 1: Table Of Contents
27SC26BQ SERVICE MANUAL COLOR TELEVISION Chassis No. GB-D7 27SC26BQ 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
27SC26BQ 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: Safety Notice
27SC26BQ 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 27SC26BQ Precautions for using lead-free solder 1 Employing lead-free solder "PWBs" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.
Page 5: Location Of User's Control
27SC26BQ LOCATION OF USER'S CONTROL Front Panel POWER Press → On. Press again → Off. VIDEO/AUDIO IN 2 TERMINALS REMOTE CONTROL SENSOR MENU Press → Accesses MAIN MENU. VOLUME UP/DOWN CHANNEL UP/DOWN Press again → Exits MAIN MENU. (k) Increases sound.
Page 6: Installation And Service Instructions
27SC26BQ 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...
Page 7 27SC26BQ 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 8 27SC26BQ A. Deflection Item. DATA Range Remark Revision / Change V-SHIFT V-SHIFT 0 … 7 [13h D2…D0] H-PHASE H-SHIFT 0 … 31 H-PHASE.DTV [16h D4…D0] V-POS-4:3 m-con 0 … 255 V-PHASE.DTV V-SIZE V-SIZE-4:3 0 … 63 V-SIZE.DTV [11h D5…D0] H-SIZE H-SIZE-4:3 0 …...
Page 9 27SC26BQ Item. DATA Range Remark Revision / Change Auto-Slice AS-SAV 0 / 1 [16h D6] Auto-Slice AS-YUV 0 / 1 [16h D6] Auto-Slice AS-DTV 0 / 1 [16h D6] FBP VTH L FBP-TV 0 / 1 [16h D5] AS SPEED UP...
Page 10 27SC26BQ Item. DATA Range Remark Revision / Change V-TONE SHPG-YUV 0 / 1 [02h D3] Y-Delay YDL-YUV 0 … 7 [06h D2…D0] CrDL FINE ADJ. CrDL-FINE-YUV 0 … 3 [21h D3…D2] CbDL FINE ADJ. CbDL-FINE-YUV 0 … 3 [21h D1…D0] CB PEDESTAL ADJ.
Page 11 27SC26BQ Item. DATA Range Remark Revision / Change BRIGHT(OFFSET) BRIGHT-OFF-AV -63 c [0Ah D7c D0] CONTRAST(OFFSET) CON-OFF-AV -32 c [05h D6c D0] TINT(OFFSET) TINT-OFF-AV -32 c [07h D6c D0] COLOR(OFFSET) COL-OFF-AV -32 c [08h D6c D0] VIDEO-TONE(OFFSET) SHP-OFF-AV -32 c...
Page 12 27SC26BQ Item. DATA Range Remark Revision / Change R MTX DOWN V105 R-MTX-DN 0 / 1 [23h D6] V106 0 / 1 [23h D3] KILLER LEVEL V107 KILLER-LVL 0 / 1 [15h D0] SIF BPF WIDE V108 SIF-BW 0 … 3 [2Bh D5…D4]...
Page 13: Service Adjustment
27SC26BQ 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 The adjustment is needed to compensate for characteristics of parts IC801 including IC801 and MTS level (M01).
Page 14 27SC26BQ White Balance Adjustment Sub-Tint Adjustment 1. Receive a good local channel. 1. Receive the half color bar signal. • RF INPUT (TU1101) 2. Enter the service mode and select the service adjustment "V03" and set to "00" (minimum color) 2.
Page 15: Mts Adjustment
27SC26BQ Vertical-Size and Linearity Adjustments EW-Corner 1. Receive a good local channel. 1. Receive a good local channel. (SCREEN FORMAT 4:3) (SCREEN FORMAT 4:3) 2. Enter the service mode and select the service 2. Enter the service mode and select the service adjustment "D04"...
Page 16: Chassis Layout
27SC26BQ CHASSIS LAYOUT...
Page 17: Block Diagram
27SC26BQ BLOCK DIAGRAM...
Page 18: Description Of Schematic Diagrams & Waveforms
27SC26BQ 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 19: Schematic Diagrams
27SC26BQ SCHEMATIC DIAGRAM: CRT Unit...
Page 20 27SC26BQ SCHEMATIC DIAGRAM: MAIN-1 Unit DUNTKD872WEA1...
Page 21 27SC26BQ...
Page 22 27SC26BQ SCHEMATIC DIAGRAM: MAIN-2 Unit...
Page 23 27SC26BQ...
Page 24 27SC26BQ SCHEMATIC DIAGRAM: 2-LINE Y/C Unit...
Page 25 27SC26BQ...
Page 26: Printed Wiring Board Assemblies
27SC26BQ PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN Unit (Wiring Components Side)
Page 27 27SC26BQ...
Page 28 27SC26BQ PWB-A: MAIN Unit (Components side)
Page 29 27SC26BQ...
Page 30 27SC26BQ 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 31: Parts List
BH3544F-E2 IC1101 VHIPQ033DNA-1Y PQ033DNA1ZPH in USA: Contact your nearest SHARP Parts Distributor to order. IC1102 VHIBA50B0WP-1Y BA50BC0WFP-E2 For location of SHARP Parts Distributor, Please call Toll- IC1103 VHITL52055D-1Y TL52055DR Free; 1-800-BE-SHARP IC2101 VHIBR24L16F-1Y BR24L16F « MARK: SPARE PARTS-DELIVERY SECTION IC2102...
Page 32: Main Unit
27SC26BQ Ref. No. Part No. Description Code Ref. No. Part No. Description Code CAPACITORS PWB-A: DUNTKD872WEA1 [EL.··· Electrolytic, M-Poly.··· Metalized Polypro Film] MAIN UNIT C201 VCKYCY1HB102KY 1000p 50V Ceramic AA C202 VCKYCY1HB103KY 0.01 Ceramic AA C203 VCKYCY1HB102KY 1000p 50V Ceramic AA...
Page 33 27SC26BQ Ref. No. Part No. Description Code Ref. No. Part No. Description Code C840 VCKYCY1HB104KY Ceramic AA PWB-A: DUNTKD872WEA1 C841 VCKYCY1HB103KY 0.01 Ceramic AA C842 VCKYCY1HF224ZY 0.22 Ceramic AA MAIN UNIT C843 VCKYCY1HB104KY Ceramic AA C844 VCKYCY1HB102KY 1000p 50V Ceramic AA...
Page 34 27SC26BQ Ref. No. Part No. Description Code Ref. No. Part No. Description Code RJ41 VRS-CY1JF000JY 1/16W M-Ox. PWB-A: DUNTKD872WEA1 RJ46 VRS-CY1JF000JY 1/16W M-Ox. RJ47 VRS-CY1JF000JY 1/16W M-Ox. MAIN UNIT RJ48 VRS-CY1JF000JY 1/16W M-Ox. RJ49 VRS-CY1JF000JY 1/16W M-Ox. CAPACITORS RJ50 VRS-CY1JF000JY 1/16W M-Ox.
Page 35 27SC26BQ Ref. No. Part No. Description Code Ref. No. Part No. Description Code R725 VRD-RM2HD392JY 3.9k 1/2W Carbon AA PWB-A: DUNTKD872WEA1 R726 VRS-CY1JF182JY 1.8k 1/16W M-Ox. R743 VRD-RA2BE470JY 1/8W Carbon AA MAIN UNIT R751 VRD-RA2BE473JY 1/8W Carbon AA R752 VRD-RA2BE392JY 3.9k...
Page 36 27SC26BQ Ref. No. Part No. Description Code Ref. No. Part No. Description Code R1114 VRD-RA2BE101JY 1/8W Carbon AA PWB-A: DUNTKD872WEA1 R1115 VRD-RA2BE101JY 1/8W Carbon AA R1116 VRD-RA2BE101JY 1/8W Carbon AA MAIN UNIT R1118 VRD-RA2BE470JY 1/8W Carbon AA R1119 VRD-RA2BE101JY 1/8W...
Page 37: Crt Unit
27SC26BQ Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-A: DUNTKD872WEA1 PWB-B: DUNTKB568WEA0 MAIN UNIT CRT UNIT RESISTORS TRANSISTORS [M-Ox.··· Metal Oxide, M-Film ··· Metal Film] Q850 VS2SC3789//2E 2SC3789 Q851 VS2SC3789//2E 2SC3789 R3036 VRS-CY1JF102JY 1/16W M-Ox.
Page 38 27SC26BQ Ref. No. Part No. Description Code Ref. No. Part No. Description Code CAPACITORS PWB-B: DUNTKB568WEA0 [EL.··· Electrolytic, M-Poly.··· Metalized Polypro Film] CRT UNIT C1431 VCKYCY1HB103KY 0.01 Ceramic AA C1432 VCKYCY1HB103KY 0.01 Ceramic AA RESISTORS RESISTORS [M-Ox.··· Metal Oxide, M-Film ··· Metal Film] [M-Ox.···...
Page 39: Packing Parts
X WIRE (CJ) CABINET PARTS SUPPLIED ACCESSORIES CCABAB575WEH2 X Front Cabinet Assembly Not Available — Front Cabinet — HBDGB1009MESB X BADGE (SHARP PLASTIC) GCOVA0112GJKA X RC/LED Cover RRMCGA536WJSA X Infrared Remote Control Unit JBTN-0130GJKC X Button, Power TINS-D135WJZZ X Operation Manual JBTN-0131GJKC...
Page 40: Packing Of The Set
27SC26BQ PACKING OF THE SET FRONT Use tape to fix the top side of packing case. REAR Use 12 staples to fix the bottom side of packing case.
Page 41 27SC26BQ - M E M O -...
Page 42 QRC0033-U June. 2007 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...

Sharp 27SC26BQ Service Manual

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