Sharp 14V-R70M 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 .........................................................................

LOCATION OF USER'S CONTROL

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,60 Hz

POWER RATING .............................................. 65 W

PICTURE SIZE ......................

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

574 cm

(89 sq inch)

(Nominal)

SHARP (PHILS.) CORPORATION

COLOR TELEVISION

Chassis No. GA-4M

14V-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.

14V-R70M

TVSM043-14V-R70M

Page

3 W

Table of Contents

Summary of Contents for Sharp 14V-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
14V-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 14V-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
14V-R70M LOCATION OF USER'S CONTROL Front Panel Menu/Preset Down VOLUME Up / REMOTE CHANNEL Up / CHANNEL Up / CHANNEL Up / CHANNEL Up / CONTROL Down Down Down Down (Power On) POWER Standby MAIN Note: Appearance design may vary depending on models ;...
Page 5: Installation And Service Instructions
14V-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
14V-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 14V-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 14V-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 14V-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 14V-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 14V-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
14V-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 14V-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 14V-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 14V-R70M 14V-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 14V-R70M WAVEFORMS...
Page 25: Chassis Layout
14V-R70M CHASSIS LAYOUT DUNTKD373WE PR701...
Page 26: Block Diagram
14V-R70M CRT BLOCK DIA GRAM...
Page 27 14V-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 14V-R70M FILT V-HOLD P MONO L-VOL...
Page 29 14V-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 C720 1u/50V 0.0022 R609 1/2 W...
Page 31 14V-R70M SCHEMATIC DIAGRAM: CRT Unit...
Page 32: Printed Wiring Board Assemblies
14V-R70M PRINTED WIRING BOARD ASSEMBLIES R1007 R1055 R1076 R846 R837 C451 PWB-A: MAIN Unit (Wiring Side)
Page 33 14V-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 14V-R70M PWB-B: CRT Unit (Wiring Side)
Page 35: Replacement Parts List
14V-R70M REPLACEMENT PARTS LIST Ref. No. Part No. Description Replacement parts which have these special safety characteristics PWB-A: DUNTKD373WEA3 MAIN UNIT identified in this manual; electrical components having such features are identified by ! And shaded areas in the Replacement Parts...
Page 36 14V-R70M Ref. No. Part No. Description Ref. No. Part No. Description PWB-A: DUNTKD373WEA3 MAIN UNIT C210 VCKYCY1HF103Z 0.01, 50V Ceramic (Continued) C213 VCKYCY1HB102K 1000p, 50V Ceramic D751 RH-DXA006WJZZ DXA006WJ C301 VCEA0A1CW477M 470, 16V EL. D752 RH-DX0247CEZZ DX0247CE C304 VCEA9M1CW106M 10, 16V EL.
Page 37 14V-R70M Ref. No. Part No. Description Ref. No. Part No. Description PWB-A: DUNTKD373WEA3 MAIN UNIT RESISTORS (Continued) [M-Ox. …Metal Oxide, M-Film …Metal Film] C810 VCKYCY1HF103Z 0.01, 50V Ceramic RJ15 VRS-CY1JF000J 0, 1/16W M-Ox. C811 VCEA9M1CW106M 10, 16V EL. RJ16 VRS-CY1JF000J 0, 1/16W M-Ox.
Page 38 14V-R70M Ref. No. Part No. Description Ref. No. Part No. Description PWB-A: DUNTKD373WEA3 MAIN UNIT R847 VRS-CY1JF475J 4.7M, 1/16W M-Ox. (Continued) R1002 VRS-CY1JF183J 18k, 1/16W M-Ox. R621 VRS-SV2HC100J 10, 1/2W M-Film R1003 VRS-CY1JF822J 8.2k, 1/16W M-Ox. R622 VRS-VV3DB682J 6.8k, 2W M-Ox.
Page 39 14V-R70M Ref. No. Part No. Description Ref. No. Part No. Description PWB-A: DUNTKD373WEA3 MAIN UNIT PWB-B: DUNTKA599WEK4 CRT UNIT (Continued) TRANSISTORS R1895 VRS-CY1JF473J 47k, 1/16W Carbon Q853 RH-TX0110BMZZ TX0110BM R1896 VRS-CY1JF473J 47k, 1/16W Carbon Q854 RH-TX0110BMZZ TX0110BM Q855 RH-TX0110BMZZ TX0110BM...
Page 40 14V-R70M Ref. No. Part No. Description Ref. No. Part No. Description MISCELLANEOUS PARTS QACCUA001WJZZ AC Cord VSP9050PB53WA Speaker LBNDC0001PFZZ Wire Holder LHLDW1002PEZZ Wire Holder LHLDW1003PEZZ Wire Holder LHLDW1060PEZZ Wire Holder LHLDZ0063PEZZ H/V Holder LX-WZ5225CEFD CRT Washer PSPAG0007TA00 CRT Spacer QCNW-A871WJZZ "YBN"...
Page 41: Packing Of The Set
14V-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 ACKNOWLEDGEMENT TO THE FOLLOWING: ELECTRICAL GROUP ALVIN A. UGALDE Chief Engineer ANGUSTIA D.C. CALING Senior Engineer MICHAEL M. MAVINES Circuit Design Engineer NANNIE D. TANDUG Circuit Design Engineer NOEL M. RUEDA Circuit Design Engineer JOEL F. MAHILUM Circuit Design Engineer SONNY C.
Page 43 I. NAKAMURA M. GABIT A. UGALDE A. CALING Noted Approved Checked Prepared Issue No. Date Received by...

Sharp 14V-R70M Service Manual

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Summary of Contents for Sharp 14V-R70M

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