Sharp 21FL84 Service Manual
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Sharp 21FL84 Service Manual

Sharp 21FL84 Service Manual

Color television
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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 ................................................................................................................... 12
» CHASSIS LAYOUT................................................................................................................................ 15
» BLOCK DIAGRAM..............................................................................................................................16
» DESCRIPTION OF SCHEMATIC DIAGRAMS & WAVEFORMS........................................................ 19
» SCHEMATIC DIAGRAMS ................................................................................................................... 20
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 23
» REPLACEMENT PARTS LIST ............................................................................................................26
» PACKING OF THE SET ...................................................................................................................... 31
POWER INPUT ....................................... AC 110~220 V, 50/60 Hz
POWER RATING .................................................................... 88W
PICTURE SIZE .......................................... 1,239 cm
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS .................................................. QFP/UNI-B1 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 ........................................ 3.0 W(RMS) x 2pcs

SHARP CORPORATION

SERVICE MANUAL

MODEL
CONTENTS

ELECTRICAL SPECIFICATIONS

SPEAKER
SIZE ................................................................... 12 x 5 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
21FL84
(EIA, Channel Plan U.S.A.)
21FL84
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Summary of Contents for Sharp 21FL84

  • Page 1: Table Of Contents

    21FL84 SERVICE MANUAL COLOR TELEVISION Chassis No. GA-4 21FL84 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

    21FL84 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

    21FL84 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

    21FL84 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

    21FL84 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. CIRCUIT PROTECTION HIGH VOLTAGE CHECK The receiver is protected by a 3.15A fuse (F701),...

  • Page 6: Service Mode

    21FL84 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 command during service mode. 3. If key input port (SERVICE) input is LOW, then it is in service mode.
  • Page 7 21FL84 Adjustment Mode Items Item Name Register Range Default SUB-PICTURE 1 Chip CONTRAST 0~127 SUB-TINT 1 Chip TINT 0~127 SUB-COLOR 1 Chip COLOR 0~127 SUB-BRIGHT 1 Chip BRIGHT 0~255 SUB-SHARP 1 Chip VIDEO-TONE 0~63 V-SHIFT 1 Chip V-SHIFT H-SHIFT 1 Chip...

  • Page 8: Self Adjustment

    21FL84 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 21FL84 Setting Mode Items Item Name Register Range Default VIDEO TONE -GAIN (TV) 1 Chips V-TONE VIDEO TONE -GAIN (AV) 1 Chips V-TONE VIDEO TONE -GAIN (S-AV) 1 Chips V-TONE VIDEO TONE -GAIN(YUV) 1 Chips V-TONE ABCL 1 Chips ABCL...
  • Page 10 21FL84 Setting Mode Items (Continued) Item Name Register Range Default FAO-VOL 0~63 CHARGE PUMP CC LEVEL MICON CC LEVEL OSD POS MICON OSD POS OFFSET-ADJ-COL 1 Chips COLOR -32~+32 OFFSET-ADJ-TINT 1 Chips TINT -32~+32 OFFSET-ADJ-TINT-YUV 1 Chips BASEBAND-TINT -32~+32 TIMER4-LOW SPEED...
  • Page 11 21FL84 Option Mode Items OPTION FUNCTION Default Data DEMO Without DEMO With DEMO DOWNLOAD Without V-CHIP OP With V-CHIP OP V-CHIP Without V-CHIP With V-CHIP SPEAKER Without SPEAKER With SPEAKER Without FAO With FAO P.PREF Without P.REF With P.REF UNIV+...

  • Page 12: Adjustment Method

    21FL84 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 JA301 and JA410 There is three stage of Service Mode data...
  • Page 13 21FL84 Second Stage Data Service Mode Function Range Default Data VIDEO TONE -GAIN (TV) V-TONE VIDEO TONE -GAIN (AV) V-TONE VIDEO TONE -GAIN (S-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-SAV VIDEO-TONE(OFFSET) -16~+16...
  • Page 14 21FL84 Second Stage (Continued) Data Service Mode Function Range Default Data CHARGE PUMP CC LEVEL CC LEVEL OSD POS OSD POS OFFSET-ADJ-COL COLOR -32~+32 OFFSET-ADJ-TINT TINT -32~+32 OFFSET-ADJ-TINT-YUV BASEBAND-TINT -32~+32 TIMER4-LOW SPEED TIMER4 VALUE 0~225 TIMER4-HIGH SPEED TIMER4 VALUE 0~225...

  • Page 15: Chassis Layout

    21FL84 CHASSIS LAYOUT...

  • Page 16: Block Diagram

    21FL84 MAIN BLOCK DIAGRAM...
  • Page 17 21FL84...
  • Page 18 21FL84 CRT BLOCK DIAGRAM...

  • Page 19: Description Of Schematic Diagrams & Waveforms

    21FL84 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 (K=k Ω =1000 Ω , M=M Ω ) wave shapes at the red, green and blue cathodes of 2.

  • Page 20: Schematic Diagrams

    21FL84 SCHEMATIC DIAGRAM: MAIN-1 Unit...
  • Page 21 21FL84...
  • Page 22 21FL84 SCHEMATIC DIAGRAM: CRT Unit...

  • Page 23: Printed Wiring Board Assemblies

    21FL84 PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN Unit (Wiring Side)
  • Page 24 21FL84 R1 0 2 7 RJ 1 6 R1 0 2 4 C1 0 1 6 R3 8 3 R1 0 0 3 R1 0 0 2 R1 0 0 7 F DC1 R1 0 8 3 Q1 0 7 2...
  • Page 25 21FL84 PWB-B: CRT Unit (Wiring Side)

  • Page 26: Replacement Parts List

    IC3002 VHIMM1501XN-1Y X MM1501XN 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- Q601 VS2SC2235Y/1E+ X 2SC2235-Y Free; 1-800-BE-SHARP Q602 VSTT2140+++-F X TT2140LS p MARK: SPARE PARTS-DELIVERY SECTION...

  • Page 27: Main Unit

    21FL84 Ref. No. Part No. « Description Code Ref. No. Part No. « Description Code C505 VCEA0A1HW107M+ X PWB-A: DUNTKC522WEA2 C508 VCFYAA2AA224J+ 0.22 100V M-Poly. C511 VCEA0A1VW477M MAIN UNIT C512 VCKYPA2HB102K+ 1000p 500V Ceramic AA C513 RC-EZA332WJZZ+ 1000 DIODES C514 VCFYSA1JB273J+ 0.027...
  • Page 28 21FL84 « Description Ref. No. Part No. Code Ref. No. Part No. « Description Code R208 VRS-CY1JF331JY 1/16W M-Ox. PWB-A: DUNTKC522WEA2 R209 VRS-CY1JF392JY 3.9k 1/16W M-Ox. R216 VRS-RG3LB333J+ 3.0W M-Ox. MAIN UNIT R220 VRS-CY1JF221JY 1/16W M-Ox. R301 VRS-CY1JF102JY 1/16W M-Ox.
  • Page 29 21FL84 « Description « Description Ref. No. Part No. Code Ref. No. Part No. Code R1051 VRD-RA2BE473JY 1/8W Carbon PWB-A: DUNTKC522WEA2 R1054 VRD-RA2BE101JY 1/8W Carbon MAIN UNIT R1055 VRS-CY1JF332JY 3.3k 1/16W M-Ox. R1056 VRS-CY1JF332JY 3.3k 1/16W M-Ox. R1059 VRS-CY1JF103JY 1/16W M-Ox.

  • Page 30: Packing Parts

    21FL84 Ref. No. Part No. « Description Code Ref. No. Part No. « Description Code PWB-B: DUNTKA599WED5 PACKING PARTS CRT UNIT TRANSISTORS Q854 VS2SC3789//2E 2SC3789 SPAKCB492WJZZ PACKING CASE Q855 VS2SC3789//2E 2SC3789 SPAKPA125WJZZ LAMIN FOAM Q894 VS2SA1015Y/1E+ 2SA1015Y SPAKXA145WJZZ PACKING FOAM...

  • Page 31: Packing Of The Set

    21FL84 21FL84 PACKING OF THE SET...
  • Page 32 21FL84 - M E M O -...
  • Page 33 QRC0008-L June. 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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