Sharp SX51LF7 Service Manual
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Sharp SX51LF7 Service Manual

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STEREO
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.
Ë Full Auto Channel Preset and Auto Channel Skip
Ë 100-CH Program Memory
Ë CATV(Hyper Band) Ready <Used Frequency Synthesizer
Tuner>
Ë Black Stretch Circuit
Ë On Timer/Sleep Timer/Reminder Timer
Ë Blue Back Noise Mute
Ë Front AV-In & Rear AV-IN/OUT Terminals
Ë Colour Comb Filter (NTSC Only)
» SPECIFICATIONS ........................................... 2
» IMPORTANT SERVICE NOTES ...................... 2
» ADJUSTMENT PRECAUTIONS ..................... 3
» HOTEL MODE APPLICATION ...................... 13
» MEMORY MAP .............................................. 14
» TROUBLE SHOOTING TABLE ..................... 26
» CHASSIS LAYOUT ........................................ 31
» WAVEFORMS ............................................... 32
MAIN UNIT ............................................... 34
CRT UNIT ................................................. 42
The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power
receptacle, when servicing this chassis. To prevent electric shock, do not remove cover. No user - serviceable
parts inside. Refer servicing to qualified service personnel.
SERVICE MANUAL
PUSH OPEN
FEATURE
CONTENTS
Page
WARNING
SHARP CORPORATION
COLOUR TELEVISION
Chassis No. UAF
SX51LF7
SX51LF8
MODELS
Ë High Contrast Picture
Ë Hotel Mode
Ë Multi Longuages OSD(Eng/Chi/Fre/Malay/Arab/Ru)
Ë NICAM B/G & A2 STEREO B/G(SX51LF8 Only)
Ë A2 STEREO B/G(SX51LF7 Only)
Ë TELETEXT (One Page)-English / German / French /
Spanish / Italian / Swedish (SX51LF8 Only)
Ë White Temperature Adjustment
IGR Unit .................................................... 44
NICAM Unit .............................................. 46
» BLOCK DIAGRAM ........................................ 48
» PRINTED WIRING BOARD ASSEMBLIES ... 52
» REPLACEMENT PARTS LIST
ELECTRICAL PARTS ............................... 57
MISCELLANEOUS PARTS ...................... 64
SUPPLIED ACCESSORIES ..................... 64
PACKING PARTS ..................................... 64
CABINET PARTS ..................................... 64
» PACKING OF THE SET ................................ 65
1
SX51LF7
SX51LF8
S22F8SX51LF7/
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  • Page 1: Table Of Contents

    Ë Multi Longuages OSD(Eng/Chi/Fre/Malay/Arab/Ru) Ë NICAM B/G & A2 STEREO B/G(SX51LF8 Only) Tuner> Ë Black Stretch Circuit Ë A2 STEREO B/G(SX51LF7 Only) Ë On Timer/Sleep Timer/Reminder Timer Ë TELETEXT (One Page)-English / German / French / Ë Blue Back Noise Mute Spanish / Italian / Swedish (SX51LF8 Only) Ë...
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  • Page 14: Memory Map

    SX51LF7 SX51LF8 MEMORY MAP DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA 00-FF PASS WORD 00-FF PASS WORD 00-FF PASS WORD 00-FF PASS WORD...
  • Page 15 SX51LF7 SX51LF8 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA 00-0F SHARPNESS-OFFSET (SECAM) 00-0F SHARPNESS-OFFSET (N358) 00-0F SHARPNESS-OFFSET (N443) 00-01...
  • Page 16 SX51LF7 SX51LF8 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA 00-FF FAVOURITE PROGRAM RED 00-FF FAVOURITE PROGRAM GREEN 00-FF FAVOURITE PROGRAM YELLOW...
  • Page 17 SX51LF7 SX51LF8 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA 00-FF IGR_ST 0 IGR_ST 1 IGR_ST 2 IGR_ST 3 IGR_ST 4...
  • Page 18 SX51LF7 SX51LF8 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA REMARK 00-FF NIC_3D 32 NIC_3D 33 NIC_3D 34 NIC_3D 35 NIC_3D 36...
  • Page 19 SX51LF7 SX51LF8 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA S-SYS (auto) C-SYS TUNING FREQUANCY (HIGHER PART) POS 13 TUNING FREQUANCY (LOWER PART)
  • Page 20 SX51LF7 SX51LF8 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA TUNING FREQUANCY (HIGHER PART) POS 34 TUNING FREQUANCY (LOWER PART)
  • Page 21 SX51LF7 SX51LF8 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA TUNING FREQUANCY (LOWER PART) POS 55 S-SYS (auto) C-SYS TUNING FREQUANCY (HIGHER PART)
  • Page 22 SX51LF7 SX51LF8 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA S-SYS (auto) C-SYS TUNING FREQUANCY (HIGHER PART) POS 77 TUNING FREQUANCY (LOWER PART)
  • Page 23 SX51LF7 SX51LF8 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA TUNING FREQUANCY (HIGHER PART) POS 98 TUNING FREQUANCY (LOWER PART)
  • Page 24 SX51LF7 SX51LF8 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA MODEL MODEL LETTER NO. LETTER NO.
  • Page 25 SX51LF7 SX51LF8 MEMORY MAP (Continued) DATA ADDRESS MICON EEPROM EEPROM CHASSIS CTV FINAL LAST INITIAL (HEX) DEFAULT RANGE REMARK WRITE(CPU) CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA MODEL MODEL LETTER NO. LETTER NO.

  • Page 26: Trouble Shooting Table

    SX51LF7 SX51LF8 TROUBLE SHOOTING TABLE NO RASTER Check F701. Blown out. Replace the fuse. Check T701 pin (7) voltage The fuse is again blown out. (Approx. 310V at 220V AC) Check R701, R707 and Check IC701, D701 and D709. C707.
  • Page 27 Does signal appear at pins (2) and (5) of IC302 ? Check NICAM/ Check IC401. Check IC302 and IGR unit, tuner Check Speaker. peripheral circuit. and its peripheral circuit. *NOTE: NICAM/IGR for model SX51LF8 Only IGR for model SX51LF7 Only.
  • Page 28 SX51LF7 SX51LF8 TROUBLE SHOOTING TABLE (Continued) NEITHER VERTICAL NOR HORIZONTAL SYNCHRONIZATION CIRCUIT TO BE CHECKED: » Sync. Separator Circuit. Check pins(33) and (34) of IC801. DEFECTIVE VERTICAL AMP. AND VERTICAL LINEARITY Readjust vertical size. (Bas Data) Vertical linearity and size is abnormal.
  • Page 29 SX51LF7 SX51LF8 TROUBLE SHOOTING TABLE (Continued) NO SPECIFIC COLOUR Is some colour produced in B/W broadcast reception ? Is the white balance properly Check IC801, R801, R802, adjusted ? R803, D804, D805, D806 and Q801. Readjust the white balance. The picture colour is cyan.

  • Page 30: Solid State Device Base Diagram

    SX51LF7 SX51LF8 SOLID STATE DEVICE BASE DIAGRAM TOP VIEW COLLECTOR COLLECTOR :BG: BASE EMITTER BASE EMITTER M24C08W FX0008GE D601A B709A COLLECTOR BASE EMITTER iX3410CE 2SC2735 AN5891 M52797 /iX3412CE SIDE VIEW BASE BASE COLLECTOR COLLECTOR EMITTER EMITTER 2SC1815 2SC2482 SE120N DX0476CE...

  • Page 31: Chassis Layout

    SX51LF7 SX51LF8 CHASSIS LAYOUT...

  • Page 32: Waveforms

    SX51LF7 SX51LF8 WAVEFORMS 0.98 Vp-p 4.08 Vp-p 3.68 Vp-p 4.2 Vp-p HorizRate HorizRate HorizRate HorizRate 88.8 Vp-p 107.2 Vp-p 109.6 Vp-p 3.32 Vp-p HorizRate HorizRate HorizRate Vert Rate 2.28 Vp-p 138 Vp-p 9.12 Vp-p 0.13 Vp-p HorizRate HorizRate HorizRate Vert Rate 0.18 Vp-p...

  • Page 33: Description Of Schematic Diagram

    SX51LF7 SX51LF8 DESCRIPTION OF SCHEMATIC DIAGRAM SAFETY NOTES: NOTES: 1. The unit of resistance "ohm" is omitted. 1. DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE REPLACING PARTS. (K = 1000 ohms, M = Mega ohm). 2. SEMICONDUCTOR HEAT SINKS SHOULD BE REGARDED AS 2.

  • Page 34: Schematic Diagram

    SX51LF7 SX51LF7 SX51LF8 SX51LF8 SCHEMATIC DIAGRAM: MODEL SX51LF7 MAIN Unit -1/2...
  • Page 35 SX51LF7 SX51LF7 SX51LF8 SX51LF8 SCHEMATIC DIAGRAM: MODEL SX51LF7 MAIN Unit -2/2...
  • Page 36 SX51LF7 SX51LF7 SX51LF8 SX51LF8 SCHEMATIC DIAGRAM: MODEL SX51LF8 MAIN Unit -1/2...
  • Page 37 SX51LF7 SX51LF7 SX51LF8 SX51LF8 SCHEMATIC DIAGRAM: MODEL SX51LF8 MAIN Unit -2/2...

  • Page 38: Crt Unit

    SX51LF7 SX51LF8 SCHEMATIC DIAGRAM: MODEL SX51LF7 CRT Unit...
  • Page 39 SX51LF7 SX51LF8 SCHEMATIC DIAGRAM: MODEL SX51LF8 CRT Unit...
  • Page 40 SX51LF7 SX51LF7 SX51LF8 SX51LF8 SCHEMATIC DIAGRAM: MODEL SX51LF7 IGR Unit...

  • Page 41: Nicam Unit

    SX51LF7 SX51LF7 SX51LF8 SX51LF8 SCHEMATIC DIAGRAM: MODEL SX51LF8 NICAM Unit...
  • Page 42 SX51LF7 SX51LF7 SX51LF8 SX51LF8 BLOCK DIAGRAM - 1/3:MAIN BLOCK...
  • Page 43 SX51LF7 SX51LF8 BLOCK DIAGRAM - 2/3: CRT / IGR BLOCK SX51LF7...
  • Page 44 SX51LF7 SX51LF8 BLOCK DIAGRAM - 3/3: NICAM/IGR BLOCK SX51LF8...
  • Page 45 SX51LF7 SX51LF7 SX51LF8 SX51LF8 PRINTED WIRING BOARD ASSEMBLIES PWB-A: MAIN Unit (Wiring Side)
  • Page 46 SX51LF7 SX51LF7 SX51LF8 SX51LF8 PWB-A: MAIN Unit (Component Side)
  • Page 47 SX51LF7 SX51LF8 PWB-B: CRT Unit (Component Side) PWB-C: NICAM/IGR Unit (Wiring Side) PWB-C: NICAM/IGR Unit (Component Side)
  • Page 48 R Zener Diode (NOT REPLACEMENT ITEM) D502 RH-EX0654CEZZ R Zener Diode D504 RH-DX0048GEZZ R Diode D505 RH-DX0295CEZZ R Diode DUNTKA200FMW0 - Main Unit (SX51LF7) — D506 RH-DX0295CEZZ R Diode DUNTKA200FMW6 - Main Unit (SX51LF8) — D509 RH-EX0640GEZZ R Zener Diode DUNTK9669FMX0 - IGR Unit (SX51LF7) —...
  • Page 49 SX51LF7 SX51LF8 Ref. No. Part No. Description Code Ref. No. Part No. Description Code D716 RH-EX0615GEZZ R Zener Diode C211 VCKYCY1EF104Z R 0.1 Ceramic D718 RH-EX0649GEZZ R Zener Diode C212 VCEA0A1CW106M R 10 Electrolytic D719 RH-EX0649GEZZ R Zener Diode C213 VCKYCY1HF223Z R 0.022 50V...
  • Page 50 SX51LF7 SX51LF8 Ref. No. Part No. Description Code Ref. No. Part No. Description Code C409 VCKYCY1CF474Z R 0.47 Ceramic C802 VCEA0A1CW337M R 330 Electrolytic C410 VCKYCY1CF474Z R 0.47 Ceramic C803 VCEA0A1CW107M R 100 Electrolytic C411 VCKYCY1HB102K R 1000p 50V Ceramic...
  • Page 51 SX51LF7 SX51LF8 Ref. No. Part No. Description Code Ref. No. Part No. Description Code R222 VRS-CY1JF681J R 680 1/16W Metal Oxide R515 VRD-RA2BE153J R 15k 1/8W Carbon R223 VRD-RA2BE101J R 100 1/8W Carbon R516 VRD-RA2BE153J R 15k 1/8W Carbon R224...
  • Page 52 Carbon R1046 VRD-RA2BE103J R 10k 1/8W Carbon PACKAGED CIRCUITS R1048 VRS-CY1JF103J R 10k 1/16W Metal Oxide X2301 RCRSB0038PEZZ R Crystal(SX51LF7) R1049 VRS-CY1JF101J R 100 1/16W Metal Oxide X2301 RCRSB0295CEZZ R Crystal(SX51LF8) R1050 VRS-CY1JF102J R 1k 1/16W Metal Oxide R1052 VRD-RA2BE101J...
  • Page 53 SX51LF7 SX51LF8 Ref. No. Part No. Description Code Ref. No. Part No. Description Code C2311 VCKYCY1HB681K R 680p 50V Ceramic (SX51LF8) (SX51LF7) RJ2313 VRS-CY1JF000J 1/16W Metal Oxide C2313 VCFYFA1HA474J R 0.47 Mylar (SX51LF7) (SX51LF8) R2306 VRS-CY1JF562J R 5.6k 1/16W Metal Oxide...
  • Page 54 SX51LF7 SX51LF8 Ref. No. Part No. Description Code Ref. No. Part No. Description Code MISCELLANEOUS PARTS FB2300 RBLN-0062TAZZ R Ferrite Bead(SX51LF8) FB2302 RBLN-0062TAZZ R Ferrite Bead FB2303 RBLN-0067CEZZ R Ferrite Bead FB2304 RBLN-0067CEZZ R Ferrite Bead FB2305 RBLN-0062TAZZ R Ferrite Bead(SX51LF8)

  • Page 55: Miscellaneous Parts

    — SUPPLIED ACCESSORIES ACCESSORIES RRMCG1586PESA R Infrared Remote Control Unit AQ (SX51LF7) RRMCG1577PESA R Infrared Remote Control Unit AR (SX51LF8) TiNS-7579PEZZ R Opearation Manual(SX51LF7) AH STEREO TiNS-7678PEZZ R Opearation Manual(SX51LF8) AH ACCESSORIES (NOT REPLACEMENT ITEM) TCAUA0002PEZZ - Causion Card —...

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