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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.
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ELECTRICAL SPECIFICATIONS -------------------------------------------------------------------
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IMPORTANT SERVICE SAFETY PRECAUTION -----------------------------------------------
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LOCATION OF USER'S CONTROL ---------------------------------------------------------------
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INSTALLATION AND SERVICE INSTRUCTIONS -----------------------------------------------
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CHASSIS LAYOUT -------------------------------------------------------------------------------------
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BLOCK DIAGRAM --------------------------------------------------------------------------------------
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SCHEMATIC DIAGRAMS -----------------------------------------------------------------------------
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PRINTED WIRING BOARD ASSEMBLIES -------------------------------------------------------
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REPLACEMENT PARTS LIST -----------------------------------------------------------------------
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PACKING OF THE SET --------------------------------------------------------------------------------
POWER INPUT .............. 110~230 V AC 60Hz
POWER RATING ................................ 55W
PICTURE SIZE ............. 574 cm
CONVERGENCE .......................... Magnetic
SWEEP DEFLECTION ................... Magnetic
FOCUS ........................... QPF Electrostatic
INTERMEDIATE FREQUENCIES
Picture IF Carrier Frequency .... 45.75 MHz
Sound IF Carrier Frequency ..... 41.25 MHz
Color Sub-Carrier Frequency ... 42.17 MHz
SHARP (PHILS.) CORPORATION
Km 23 West Service Road, South Super Highway Alabang, City of Muntinlupa
SERVICE MANUAL
CONTENTS
ELECTRICAL SPECIFICATIONS
2
(89 sq inch)
(Nominal)
TVSM017-14V-L70M
NTSC SYSTEM
COLOR TELEVISION
GA-1- CHASSIS
MODEL :
14V-L70M
AUDIO POWER OUTPUT RATING .......... 3 W
SPEAKER SIZE ............................. 9 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.
1
2
4
5
13
14
18
21
24
31
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Summary of Contents for Sharp 14V-L70M
- Page 1 Sound IF Carrier Frequency .…. 41.25 MHz CATV Channels ……..………….. 1 thru 125 Color Sub-Carrier Frequency … 42.17 MHz (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 14V-L70M IMPORTANT SERVICE SAFETY PRECAUTION 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 For continued safety, no modification of any circuit Be sure all service personnel are aware of the should be attempted.
- Page 3 14V-L70M 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 cabinet, screw heads, knobs and control shafts, (Fire & Shock Hazard) escutcheon and etc.) and measure the AC voltage drop across the resistor.
- Page 4 14V-L70M LOCA TION OF USER'S CONTROL Front Panel Menu VOLUME Up / Down FRONT REMOTE CHANNEL Up / Down CONTROL S ensor (Power On) POWER S tandby indicator MAIN Power Basic Remote Control Functions Infr a red Transmitter Windo w...
- Page 5 14V-L70M INSTALLATION AND SERVICE INSTRUCTIONS Note: When performing any adjustments to resistor controls and transformers use non-metallic screwdrivers or TV alignment tools. 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 14V-L70M 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.
- Page 7 14V-L70M SERVICE MODE (1) In the Service Mode, Key is used to select the mode in the following order. AGC & WHITE POINT GEOMETRIC ADJ. ADJ. MODE MODE MODE OFFSET ADJ. MODE FEATURE OPTION OPTION ADJ. MODE MODE MODE AGC &...
- Page 8 14V-L70M AGC & GEOMETRIC ADJ. MODE MODE Y-D TIME (TV) [YD] (DL-TV) ATTENUATE INPUT SIGNAL LEVEL (ATT) Y-D TIME (AV) [YD] (DL-AV) VCO FREE RUNNING FREQUENCY ADJ. (VCO) INITIAL/DEFAULT LANGUAGE (INIT) STEREO, SAP, DBX FILTER ADJ. (FILTER) FAO-MAX VOLUME (FA0-VOL)
- Page 9 14V-L70M SERVICE MODE SERVICE DATA ADJUST ITEM REMARK INITIAL VALUE POSITION RANGE FIX/ADJ AGC TAKE OVER POINT 0~63 V-LIN VERTICAL SLOPE 0~63 V-AMP VERTICAL AMP 0~63 V-CENT VERTICAL SHIFT 0~63 V-ZOOM VERTICAL ZOOM 0~63 H-CENT HORIZONTAL SHIFT 0~63 H-SIZE EAST-WEST WIDTH...
- Page 10 14V-L70M SERVICE DATA ADJUST ITEM REMARK INITIAL VALUE POSITION RANGE FIX/ADJ FMWS FM WINDOW SELECTION 0 (disable) or 1 (enable) SOUND MUTE BIT 0 (SM0) 0 (disable) or 1 (enable) SOUND MUTE BIT 1 0 (disable) or 1 (enable) AGC0...
- Page 11 14V-L70M SERVICE ADJUSTMENT RF AGC Adjustment 1. Receive a good local channel. 2. Enter the service mode signal category and select the service adjustment "AGC". 3. Set the data value to point where no noise or beat appears. 4. Select another channel to confirm that no noise or beat appears.
- Page 12 14V-L70M CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT No. Adjusting point Adjusting procedure/conditions Waveform and others CRT CUTOFF 1. Switch TV to VIDEO mode, BLUE BACK OFF, with ADJUSTMENT NO VIDEO signal. (I2C BUS 2. Press R/C to set Picture Normal condition.
- Page 13 14V-L70M MODEL 14V-L70M CHASSIS LAYOUT...
- Page 14 14V-L70M BLOCK DIAGRAM...
- Page 15 MODEL 14V- L70M BLOCK DIAGRAM 14V-L70M...
- Page 16 14V-L70M DESCRIPTION OF SCHEMATIC DIAGRAM WAVEFORM MEAS UREMENT 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= k = 1000 , M= M ) wave shapes at the red, green and blue cathodes of 2.
- Page 17 14V-L70M SCHEMATIC DIAGRAM: CRT Unit...
- Page 19 14V-L70M PRINTED WIRING BOARD ASSEMBLIES T CLINCH DUNTKA543WE N CLINCH P352 CH DOWN VOL UP VOL DOWN\ PIC/ CH UP S1002 S1003 S1004 PRESET J402 J404 J403 J408 C760 J410 J408 WHITE J351 P351 (QKITPA541CEN4) WHITE C1001 S1001 IC302 D1001...
- Page 20 14V-L70M RJ46 R1007 R1009 R1008 R1002 R335 R1006 R1003 RJ23 R315 RJ34 RJ24 Q320 R305 R1072 RJ52 RJ26 R1051 IC1003 R1040 RJ55 R1041 R1035 R304 Q804 R1037 C529 R530 RJ75 R1038 R1014 R1016 R1034 R1021 C1005 D1019 C1018 R1020 RJ78...
- Page 21 14V-L70M PWB-B: CRT Unit (Wiring Side) PWB-B: CRT Unit (Chip Parts Side)
- Page 22 14V-L70M REPLACEMENT PARTS LIST Ref. No. Part No. Description Replacement parts which have these special safety PWB-A: DUNTKA541WEF2 MAIN UNIT characteristics identified in this manual; electrical components having such features are identified by ! And shaded areas in TUNER the Replacement Parts Lists and Schematic Diagrams. The use...
- Page 23 14V-L70M Ref. No. Part No. Description Ref. No. Part No. Description PWB-A: DUNTKA541WEF2 MAIN UNIT C211 VCKYCY1HF103Z 0.01, 50V Ceramic (Continued) C231 VCKYCY1HF223Z 0.022, 50V Ceramic D754 RH-EX0616GEZZ Zener Diode, 5.6V C232 VCKYCY1HB821K 820p,50V Ceramic D755 RH-EX0603GEZZ Zener Diode, 3.9V...
- Page 24 14V-L70M Ref. No. Part No. Description Ref. No. Part No. Description PWB-A: DUNTKA541WEF2 MAIN UNIT VRS-CY1JF000J 00, 1/16W M-Ox. (Continued) VRS-CY1JF000J 00, 1/16W M-Ox. C703 RC-KZ0029CEZZ 0.01, 250V Ceramic VRS-CY1JF000J 00, 1/16W M-Ox. C704 RC-KZ0029CEZZ 0.01, 250V Ceramic VRS-CY1JF000J 00, 1/16W M-Ox.
- Page 25 14V-L70M Ref. No. Part No. Description Ref. No. Part No. Description PWB-A: DUNTKA541WEF2 MAIN UNIT R618 VRS-VV3DB391J 390, 2W M-Ox. (Continued) R619 VRS-VV3LB103J 10k, 3W M-Ox. R261 VRS-CY1JF223J 22k, 1/16W M-Ox. R620 VRS-VV3AB472J 4.7k, 1W M-Ox. R262 VRS-CY1JF560J 56, 1/16W M-Ox.
- Page 26 14V-L70M Ref. No. Part No. Description Ref. No. Part No. Description PWB-A: DUNTKA541WEF2 MAIN UNIT P1002 QPLGN0541CEZZ Plug, 5-pin (BC) RMC1001 RRMCU0222CEZZ R/C Receiver (Continued) R1014 VRS-CY1JF101J 100, 1/16W M-Ox. RDA301 PRDAR0119GJFW Heatsink for IC301 R1015 VRS-CY1JF332J 3.3k, 1/16W M-Ox.
- Page 27 14V-L70M Ref. No. Part No. Description Ref. No. Part No. Description PWB-B: DUNTKA542WEA0 CRT UNIT TRANSISTORS Q870 RH-TX0110BMZZ TX0110BM Q871 RH-TX0110BMZZ TX0110BM Q872 RH-TX0110BMZZ TX0110BM Q883 RH-TX0124BMZZ TX0124BM Q885 RH-TX0124BMZZ TX0124BM Q887 RH-TX0124BMZZ TX0124BM DIODES D881 RH-DX0048GEZZ Diode D882 RH-DX0048GEZZ...
- Page 28 14V-L70M Ref. No. Part No. Description Ref. No. Part No. Description MISCELLANEOUS PARTS CABINET PARTS LHLDW1003PEZZ Wire Holder GCABA0341PJSA Front Cabinet LHLDW1033PEZZ Wire Holder GCABB0327PJSA Rear Cabinet LHLDZ0063PEZZ H/V Holder HBDGB0207PJSA Sharp Badge LX-WZ5225CEFD Washer HDECQ0316PJOT R/C Deco Cover PSPAG0007TA00...
- Page 29 14V-L70M PACKING OF THE SET REMOTE CONTROL ANTENNA UPPER PAD UNIT LOWER PAD CARTON BOX F R O...
- Page 30 ACKNOWLEDGEMENT TO THE FOLLOWING: AUDIO / VISUAL GROUP ANTONIO G. BAGALAY Asst. Manager Audio / Visual Group ALVIN A. UGALDE Asst. Chief Engineer Circuit & PWB Section FROILAN V. GARCIA Asst. Chief Engineer Product Engineering Section FELICISIMO R. BIDONG JR. Circuit Design Engineer ANGUSTIA C.