Sharp 21V-R70M Service Manual
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Sharp 21V-R70M 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 .........................................................................
INSTALLATION AND SERVICE INSTRUCTIONS ........................................................................
SERVICE MODE ...........................................................................................................................
ADJUSTMENT METHOD ..............................................................................................................
CHASSIS LAYOUT ....................................................................................................................... 25
BLOCK DIAGRAM ........................................................................................................................ 26
SCHEMATIC DIAGRAMS ...........................................................................................................
PRINTED WIRING BOARD ASSEMBLIES ................................................................................... 33
REPLACEMENT PARTS LIST ...................................................................................................... 36
PACKING OF THE SET ................................................................................................................ 42
POWER INPUT ..................... 110-230 V AC,50/60 Hz
POWER RATING .............................................. 82 W
PICTURE SIZE ...................... 1,240 cm
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
Km. 23 West Service Road, South Super Highway Alabang, City of Muntinlupa

SERVICE MANUAL

CONTENTS
..............................................................................................
ELECTRICAL SPECIFICATIONS
(192sq inch)
2
(Nominal)
SHARP (PHILS.) CORPORATION
COLOR TELEVISION
Chassis No. GA-4M
21V-R70M
MODEL
AUDIO POWER OUTPUT RATING ......................
SPEAKER
SIZE ........................................................ 9 cm x 5 cm
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
Specifications are subject to change without
prior notice.
21V-R70M
TVSM045-21V-R70M
Page
2
4
5
6
12
30
3 W

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Summary of Contents for Sharp 21V-R70M

  • Page 1: Table Of Contents

    UHF-Channels ........14 thru 69 Color Sub-Carrier Frequency ....42.17 MHz CATV Channels ........1 thru 125 (Nominal) Specifications are subject to change without prior notice. SHARP (PHILS.) CORPORATION Km. 23 West Service Road, South Super Highway Alabang, City of Muntinlupa...

  • Page 2: Important Service Safety Precaution

    21V-R70M IMPORTANT SERVICE SAFETY PRECAUTION Service work should be performed only by qualified service technicians who are thoroughly familiar will 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 21V-R70M 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

    21V-R70M LOCATION OF USER'S CONTROL Front Panel Menu/Preset VOLUME Up / Down REMOTE CHANNEL Up / Down CONTROL (Power On) POWER Standby MAIN Note: Appearance design may vary depending on models ; Basic Remote Control Functions REMOTE CONTROL Infrared Transmitter...

  • Page 5: Installation And Service Instructions

    21V-R70M INSTALLATION AND SERVICE INSTRUCTIONS Note: (1) When performing any adjustments to resistor controls and transformers, use non-mettalic screw drivers 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

    21V-R70M 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 21V-R70M 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

    21V-R70M 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 21V-R70M 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 21V-R70M 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 21V-R70M 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

    21V-R70M ADJUSTMENT METHOD Caution: to get into the service mode, one of the ways is press direct key for service items. There is three stage of Service Mode data First stage data from V01 ~ M06 to go into second stage of service mode data, press MENU key...
  • Page 13 21V-R70M 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 21V-R70M 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 V05 F15 F21 F23 F24 F25 F26 F27 F28 003 004 005 006 007 008 009 FUNCTION FUNCTION SHARP Y-DL(TV) Y-DL(AV) TINT-AV COL-AV R-D(R2) R-D(R) R-D(B) B-D(R2) B-D(R) B-D(B) DEMO DOWNLOAD V-CHIP FAO P.PREF UNIV+ VIEW PON-CH -18 -8 21V-R70M 21V-R70M...
  • Page 16 ADJUSTMENT ADJUSTMENT H-POSITION V-SIZE ITEM ITEM ADJUSTMENT ADJUSTMENT STEP RANGE 0-31 STEP RANGE 0~63 POSITION POSITION CONTROL CONTROL C BUS CONTROL C CONTROL PRE-ADJUST PRE-ADJUST OPTION SET UP, BUS SET UP, CRT-PURITY OPTION SET UP, BUS SET UP, CRT PURITY, V-PHASE, +B ADJUST REQUIREMENT REQUIREMENT CONTENT...
  • Page 17 ADJUSTMENT ADJUSTMENT V-PHASE CLOSED CAPTION SET UP ITEM ITEM ADJUSTMENT ADJUSTMENT STEP RANGE STEP RANGE 0~255 POSITION POSITION CONTROL CONTROL C CONTROL C CONTROL PRE-ADJUST PRE-ADJUST OPTION SET UP, BUS SET UP, CRT-PURITY OPTION SET UP, BUS SET UP REQUIREMENT REQUIREMENT CONTENT CONTENT...
  • Page 18 ADJUSTMENT ADJUSTMENT PIF-VCO H-VCO ITEM ITEM ADJUSTMENT ADJUSTMENT STEP RANGE 0~63 STEP RANGE POSITION POSITION CONTROL CONTROL C CONTROL C CONTROL PRE-ADJUST PRE-ADJUST OPTION SET UP, BUS SET UP OPTION SET UP, BUS SET UP REQUIREMENT REQUIREMENT CONTENT CONTENT NO SIGNAL (RASTER) CONDITION NO SIGNAL (RASTER) CONDITION INPUT INPUT...
  • Page 19 ADJUSTMENT ADJUSTMENT RF-AGC SCREEN ITEM ITEM ADJUSTMENT ADJUSTMENT STEP RANGE 0-127 V11,V12,V13 STEP RANGE 0-255 POSITION POSITION CONTROL CONTROL C CONTROL C CONTROL PRE-ADJUST PRE-ADJUST OPTION SET UP, BUS SET UP OPTION SET UP, BUS SET UP REQUIREMENT REQUIREMENT CONTENT CONTENT US10CH HALF COLOR BAR WINDOW PATTERN OR US6 CH LION HEAD...
  • Page 20 ADJUSTMENT ADJUSTMENT WHITE BALANCE SUB-BRIGHT ITEM ITEM ADJUSTMENT ADJUSTMENT V14,V15,V11,V12,V13 STEP RANGE 0-127, 0~255 STEP RANGE 0-255 POSITION POSITION CONTROL C BUS CONTROL C CONTROL CONTROL PRE-ADJUST PRE-ADJUST OPTION SET UP, BUS SET UP, SCREEN OPTION SET UP, BUS SET UP, SCREEN, WHITE BALANCE REQUIREMENT REQUIREMENT CONTENT...
  • Page 21 ADJUSTMENT ADJUSTMENT SUB-PICTURE SUB-TINT ITEM ITEM ADJUSTMENT ADJUSTMENT STEP RANGE 0-127 STEP RANGE 0-127 POSITION POSITION CONTROL CONTROL C BUS CONTROL C CONTROL PRE-ADJUST PRE-ADJUST OPTION SET UP, BUS SET UP, SCREEN, WHITE BALANCE, SUB-BRIGHTNESS OPTION SET UP, BUS SET UP, VCO ADJ, RF-AGC REQUIREMENT REQUIREMENT CONTENT...
  • Page 22 ADJUSTMENT ADJUSTMENT SUB-COLOR X-RAY PROTECTION OPERATING CONFIRMATION ITEM ITEM ADJUSTMENT ADJUSTMENT STEP RANGE 0-127 STEP RANGE POSITION POSITION CONTROL CONTROL C BUS CONTROL PRE-ADJUST PRE-ADJUST OPTION SET UP, BUS SET UP, VCO ADJ, RF-AGC, SUB-PICT, SUB-TNT AFTER ALL ADJUSTMENT FINISHED. REQUIREMENT REQUIREMENT CONTENT...
  • Page 23 ADJUSTMENT HIGH VOLTAGE ITEM ADJUSTMENT STEP RANGE POSITION CONTROL PRE-ADJUST AFTER ALL ADJUSTMENT FINISHED. REQUIREMENT CONTENT US 6 CH LION HEAD (MONOSCOPE PATTERN) INPUT AC 230V, RF INPUT CONDITION OUTPUTW CRT ANODE VOLTAGE SET THE USER CONTROL TO SHIPMENT SETTING POSITION. PUSH ON Y-MUTE BY R/C CONFIRM THE VOLTAGE OF CRT ANODE BY HIGH VOLTAGE METER AND MAKE SURE THE READING IS AS BELOW.
  • Page 24 21V-R70M WAVEFORMS...

  • Page 25: Chassis Layout

    21V-R70M CHASSIS LAYOUT DUNTKD373WE PR701...

  • Page 26: Block Diagram

    21V-R70M CRT BLOCK DIA GRAM...

  • Page 27: Main Block Diagram

    21V-R70M MAIN BLOCK DIAGRAM IC303 VOLUME AUDIO OUT AUDIO BYPASS EX AUDIO IN VIF VCO VIF APC VIF AGC2 VIF AGC1 REAR FRONT IC3002...
  • Page 28 21V-R70M FILT V-HOLD P MONO L-VOL...

  • Page 29: Description Of Schematic Diagram

    21V-R70M 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 W =1000 W , M=M W ) wave shapes at the red, green and blue cathodes of 2.
  • Page 30 21V-R70M C720 1u/50V 0.0022 R609 8500P 1/2 W 220u 0.56u 100K 5.6K FA123WJ...
  • Page 31 21V-R230S/21V-R70M/21V-R75M/21V-R80M 560P VB540ADAC1S1E 330P 220P...

  • Page 32: Printed Wiring Board Assemblies

    21V-R70M PRINTED WIRING BOARD ASSEMBLIES R1007 R1055 R1076 R846 R837 C451 PWB-A: MAIN Unit (Wiring Side)
  • Page 33 21V-R70M R432 R1 0 2 7 RJ 1 6 R1 0 2 4 RJ39 C1 0 1 6 R1 0 0 3 R1056 F DC1 Q1 0 0 2 I C3 0 0 2 R821 Q8 0 5 C3 0 8...
  • Page 34 21V-R70M PWB-B: CRT Unit (Wiring Side)

  • Page 35: Replacement Parts List

    21V-R70M REPLACEMENT PARTS LIST Ref. No. Part No. Description Replacement parts which have these special safety characteristics PWB-A: DUNTKD373WEA6 MAIN UNIT identified in this manual; electrical components having such features are identified by ! And shaded areas in the Replacement Parts...
  • Page 36 21V-R70M Ref. No. Part No. Description Ref. No. Part No. Description PWB-A: DUNTKD373WEA6 MAIN UNIT C209 VCKYCY1HF103Z 0.01, 50V Ceramic (Continued) C210 VCKYCY1HF103Z 0.01, 50V Ceramic D736 RH-EX0680GEZZ Zener, EX0680GE C213 VCKYCY1HB102K 1000p, 50V Ceramic D751 RH-DXA044WJZZ DXA044WJ C301 VCEA0A1CW477M 470, 16V EL.
  • Page 37 21V-R70M Ref. No. Part No. Description Ref. No. Part No. Description PWB-A: DUNTKD373WEA6 MAIN UNIT C3080 VCEA0A1CW107M 100, 16V EL. (Continued) C3081 VCKYCY1HB103K 0.01, 50V Ceramic C805 VCEA0A1HW105M 1, 50V EL. C3083 VCEA0A1CW106M 10, 16V EL. C806 VCKYCY1HF103Z 0.01, 50V Ceramic...
  • Page 38 21V-R70M Ref. No. Part No. Description Ref. No. Part No. Description PWB-A: DUNTKD373WEA6 MAIN UNIT R841 VRD-RA2BE821J 820, 1/8W Carbon (Continued) R842 VRS-CY1JF471J 470, 1/16W M-Ox. R616 VRD-RA2BE102J 1k, 1/8W Carbon R843 VRS-CY1JF103J 10k, 1/16W M-Ox. R617 VRS-CY1JF123J 12k, 1/16W M-Ox.
  • Page 39 21V-R70M Ref. No. Part No. Description Ref. No. Part No. Description PWB-A: DUNTKD373WEA6 MAIN UNIT PWB-B: DUNTKA599WEK5 CRT UNIT (Continued) TRANSISTORS R1854 VRS-CY1JF103J 10k, 1/16W M-Ox. Q853 RH-TX0110BMZZ TX0110BM R1855 VRD-RA2BE122J 1.2k, 1/8W Carbon Q854 RH-TX0110BMZZ TX0110BM R1894 VRD-RA2BE103J 10k, 1/8W Carbon...
  • Page 40 21V-R70M Ref. No. Part No. Description Ref. No. Part No. Description MISCELLANEOUS PARTS QACCU0210PJZZ AC Cord VSP9050PA02WA Speaker LBNDC0001PFZZ Wire Holder LHLDW1003PEZZ Wire Holder LHLDW1047PEZZ Wire Holder LHLDW1060PEZZ Wire Holder LHLDZ0063PEZZ H/V Holder QCNW-F275WJZZ "YBN" Wire QCNW-F276WJZZ "GBN" Wire QPGV-0410PJZZ...

  • Page 41: Packing Of The Set

    21V-R70M PACKING OF THE SET H Infrared R/C Unit H Polystyrene Bag H Rod Antenna Operation Manual Guarantee Card Service List Batteries H Polyethylene Sack H Buffer Material H Packing Case FRONT Use tapes to fix the packing case. REAR...
  • Page 42 I. NAKAMURA M. GABIT A. UGALDE S. VERZOSA Noted Approved Checked Prepared Issue No. Date Received by...

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