Sharp W21FL Service Manual
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Sharp W21FL 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 MODE ................................................................................................................................... 6
» ADJUSTMENT METHOD ..................................................................................................................... 7
» CHASSIS LAYOUT ............................................................................................................................. 14
» BLOCK DIAGRAM .............................................................................................................................. 15
» DESCRIPTION OF SCHEMATIC DIAGRAM ...................................................................................... 19
» SCHEMATIC DIAGRAMS...................................................................................................................... 20
» PRINTED WIRING BOARD ASSEMBLIES......................................................................................... 24
» REPLACEMENT PARTS LIST............................................................................................................. 28
» PACKING OF THE SET ...................................................................................................................... 34
POWER INPUT ............................................... AC 110-220V, 60 Hz
POWER RATING .................................................................... 90W
PICTURE SIZE .......................................... 1,239 cm
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS ................................................................................. Uni-Bi
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 ........................................ 4 W(RMS) x 2pcs

SHARP CORPORATION

SERVICE MANUAL

MODELS

ELECTRICAL SPECIFICATIONS

SPEAKER
SIZE ................................................................... 5 x 12 cm, 2pcs
2
(192sq 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
(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.
COLOR TELEVISION
Chassis No. GA-4
W21FL
(EIA, Channel Plan U.S.A.)
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  • Page 1: Table Of Contents

    SERVICE MANUAL COLOR TELEVISION Chassis No. GA-4 W21FL MODELS 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

    W21FL 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

    W21FL 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

    W21FL LOCATION OF USER'S CONTROL Front Panel POWER VIDEO IN 2 L-AUDIO-R Press → On. Press again → Off. SENSOR AREA FOR REMOTE CONTROL (INSIDE DOOR) MENU Press → Accesses MAIN MENU. Press again → Exits MAIN MENU. VOLUME UP/DOWN CHANNEL UP/DOWN (+) Increases sound.

  • Page 5: Installation And Service Instructions

    W21FL 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 6: Service Mode

    W21FL SERVICE MODE Service Mode Overview 1. Service mode is entered by SERVICE key input or CH-UP +VOL-DOWN input during reset. 2. Service mode is cleared by entering SERVICE key or CH-UP +VOL-DOWN key command during service mode. 3. If key input port (SERVICE) input is LOW, then it is in service mode.

  • Page 7: Adjustment Method

    W21FL ADJUSTMENT METHOD Adjustment Mode Items Caution: to get into the service mode, one of the ways is press direct key for service items. the other ways is short the main chassis JA309 and JA402 There is three stage of Service Mode data...
  • Page 8 W21FL Ë SELF ADJUSTMENT H-VCO 1. When there is H-VCO self-adjustment key input for adjustment item H-VCO, self-adjustment is performed. 2. H-FREE(1chip) is set to 1. 3. H-OUT is set by intelligent monitor output. 4. IM input is set as TIM input.
  • Page 9 W21FL Setting Mode Items Second Stage Item Name Register Range Default VideoTone-Gain (TV) 1chip V-TONE 0 / 1 VideoTone-Gain (AV) 1chip V-TONE 0 / 1 VideoTone-Gain(YUV) 1chip V-TONE 0 / 1 ABCL 1chip ABCL 0 / 1 1chip BS-OFF 0 / 1...
  • Page 10 W21FL Option Mode Items Third Stage ITEM DEFAULT DEM0 Without DEMO With DEMO O02 DOWNLOAD Without V-CHIP OP With V-CHIP OP O03 V-CHIP Without V-CHIP With V-CHIP O04 SPEAKER Without SPEAKER With SPEAKER O05 FAO Without FAO With FAO O06 P.PREF Without P.PREF...
  • Page 11 W21FL ADJUSTMENT METHOD Caution: to get into the service mode, one of the ways is press direct key for service items. the other ways is short the main chassis JA309 and JA402 There is three stage of Service Mode data...
  • Page 12 W21FL Second Stage Data Service Mode Function Range Default Data VIDEO TONE -GAIN (TV) V-TONE VIDEO TONE -GAIN (AV V-TONE VIDEO TONE -GAIN(YUV) V-TONE ABCL ABCL BS-OFF ABCL-G ABCL-G SHP-AV VIDEO-TONE(OFFSET) -16~+16 SHP-YUV VIDEO-TONE(OFFSET) -16~+16 SHP-CLIP EXTRGB-CLIP E-SAVE CONTRAST(OFFSET) 0~63...
  • Page 13 W21FL Third Stage Data Service Mode DATA="0" DATA="1" Default Data DEMO DEMO DISABLE DOWNLOAD V-CHIP OP DISABLE V-CHIP V-CHIP DISABLE SPEAKER SPEAKER DISABLE FAO DISABLE P.PREF P.REF DISABLE UNIV+ UNIV+ DISABLE VIEW TIMER VIEW TIMER DISABLE EZ-SETUP EZ-SETUP AUTO PRESET...

  • Page 14: Chassis Layout

    W21FL CHASSIS LAYOUT...

  • Page 15: Block Diagram

    W21FL CRT BLOCK DIAGRAM...
  • Page 16 W21FL MTS BLOCK DIAGRAM...

  • Page 17: Main Block Diagram

    W21FL MAIN BLOCK DIAGRAM...
  • Page 18 W21FL...

  • Page 19: Description Of Schematic Diagram

    W21FL DESCRIPTION OF SCHEMATIC DIAGRAM WAVEFORM MEASUREMENT CONDITIONS: NOTES: 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 Ω Ω Ω (K=k =1000 , M=M wave shapes at the red, green and blue cathodes of 2.

  • Page 20: Schematic Diagrams

    W21FL SCHEMATIC DIAGRAM: CRT Unit...
  • Page 21 W21FL SCHEMATIC DIAGRAM: MAIN-1 Unit...
  • Page 22 W21FL...
  • Page 23 W21FL SCHEMATIC DIAGRAM : MTS Unit...

  • Page 24: Printed Wiring Board Assemblies

    W21FL PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN Unit (Wiring Side)
  • Page 25 W21FL RJ 4 0 R1 0 2 6 R1 0 0 8 R3 8 4 R1 0 0 7 R1 0 0 9 R1 0 0 2 RJ 1 6 R3 8 3 RJ 4 8 R1 0 2 7...
  • Page 26 W21FL PWB-B: CRT Unit (Wiring Side)
  • Page 27 W21FL PWB-E: MTS MODULE Unit (Wiring Side) R3 0 8 1 Q3 0 0 7 R3 0 0 5 C3 0 0 8 C3 0 8 2 R3 0 3 6 RJ 7 RJ 2 Q3 0 0 6 RJ 6...

  • Page 28: Replacement Parts List

    IC1003 VHIBR24L04F-1Y X BR24L04F-WE2 TRANSISTORS in USA: Contact your nearest SHARP Parts Distributor to order. Q201 VS2SC2735//1EY X 2SC2735 For location of SHARP Parts Distributor, Please call Toll- Free; 1-800-BE-SHARP Q601 VS2SC2235Y/1E+ X 2SC2235-Y Q602 VSTT2140+++-F X TT2140LS « MARK: SPARE PARTS-DELIVERY SECTION...

  • Page 29: Main Unit

    W21FL Ref. No. Part No. Description Code Ref. No. Part No. Description Code C437 VCE9GA1HW106M+ X 10 PWB-A: DUNTKC522WEA6 C438 VCEA0A1CW106M+ X 10 C439 VCKYCY1HF103ZY X 0.01 Ceramic AA MAIN UNIT C452 VCE9GA1CW106M+ X 10 C505 VCEA0A1HW107M+ X 100 DIODES...
  • Page 30 W21FL Ref. No. Part No. Description Code Ref. No. Part No. Description Code R206 VRS-CY1JF122JY X 1.2k 1/16W M-Ox. PWB-A: DUNTKC522WEA6 R207 VRS-CY1JF221JY X 220 1/16W M-Ox. R208 VRS-CY1JF331JY X 330 1/16W M-Ox. MAIN UNIT R209 VRS-CY1JF392JY X 3.9k 1/16W M-Ox.
  • Page 31 W21FL Ref. No. Part No. Description Code Ref. No. Part No. Description Code R1036 VRS-CY1JF103JY X 10k 1/16W M-Ox. PWB-A: DUNTKC522WEA6 R1037 VRS-CY1JF103JY X 10k 1/16W M-Ox. R1038 VRS-CY1JF562JY X 5.6k 1/16W M-Ox. MAIN UNIT R1039 VRS-CY1JF102JY X 1k 1/16W M-Ox.

  • Page 32: Crt Unit

    W21FL Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-C: DUNTKC574WEA0 PWB-A: DUNTKC522WEA0 MAIN UNIT MTS UNIT INTEGRATED CIRCUITS MISCELLANEOUS PARTS IC3001 VHICXA2194Q-1Y X CXA2194Q P601 QPLGN0660CEZZ X plug (6 pins) TRANSISTORS P602 QPLGN0461CEZZA X plug,4pin(S1-4)

  • Page 33: Packing Parts

    W21FL Ref. No. Part No. Description Code Ref. No. Part No. Description Code PWB-C: DUNTKC574WEA0 PACKING PARTS MTS UNIT SPAKCC116WJZZ PACKING CASE RESISTORS [M-Ox.··· Metal Oxide, M-Film ··· Metal Film] SPAKP0109GJZZ LAMIFOAM SPAKXA145WJZZ PACKING FOAM R3014 VRS-CY1JF102JY X 1k 1/16W M-Ox.

  • Page 34: Packing Of The Set

    W21FL PACKING OF THE SET...
  • Page 35 QRC0026-U July. 2005 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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