Sharp 21C-FX1C Service Manual
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Sharp 21C-FX1C Service Manual

Sharp 21C-FX1C 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 Multi 21 Systems
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
» SPECIFICATIONS ........................................... 2
» IMPORTANT SERVICE NOTES ...................... 2
» ADJUSTMENT PRECAUTIONS ..................... 3
» HOTEL MODE APPLICATION ...................... 13
» MEMORY MAP .............................................. 14
» TROUBLE SHOOTING TABLE ..................... 26
» CHASSIS LAYOUT ........................................ 29
» WAVEFORMS ............................................... 31
» DESCRIPTION OF SCHEMATIC DIAGRAM .. 32
CRT UNIT ................................................. 33
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
MODELS
FEATURE
CONTENTS
Page
WARNING
SHARP CORPORATION
COLOUR TELEVISION
Chassis No. UAF-C
21C-FX1(C)/(G)
21C-FX5/FX8
Ë Colour Comb Filter (NTSC Only)
Ë High Contrast Picture
Ë Hotel Mode
Ë Multi Longuages OSD(Eng/Chi/Fre/Malay/Arab/Russian)
Ë NICAM I, B/G, D/K & A2 STEREO B/G(21C-FX5/FX8)
Ë TELETEXT (One Page)-English / German / French /
Spanish / Italian / Swedish (21C-FX5)
Ë White Temperature Adjustment
MAIN UNIT ............................................... 34
NICAM Unit .............................................. 40
» BLOCK DIAGRAM ........................................ 42
» PRINTED WIRING BOARD ASSEMBLIES ... 47
» REPLACEMENT PARTS LIST
ELECTRICAL PARTS ............................... 52
MISCELLANEOUS PARTS ...................... 58
SUPPLIED ACCESSORIES ..................... 58
PACKING PARTS ..................................... 58
CABINET PARTS ..................................... 58
» PACKING OF THE SET ................................ 59
1
21C-FX1(C)/(G)
21C-FX5/FX8
S32G721C-FX5/
Page

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Summary of Contents for Sharp 21C-FX1C

  • Page 1: Table Of Contents

    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. SHARP CORPORATION...

  • Page 2: Specifications

    SPECIFICATIONS IMPORTANT SERVICE NOTES Convergence ..............Self Convergence System Focus ..............Quadra-Potential Electrostatic Sweep Deflection ..................Magnetic Maintenance and repair of this receiver should be done by qualified Intermediate Frequencies service personnel only. Picture IF Carrier .................. 38.9MHz Sound IF Carrier Frequency SERVICE OF HIGH VOLTAGE SYSTEM AND PIC- 6.5MHz ....................

  • Page 3: Adjustment Precautions

    ADJUSTMENT PRECAUTIONS SERVICE MODE (1) In the Service Mode, Key is used to select the mode in the following order. This model’s setting are adjusted in two different ways: through the I C bus control and in the conventional analog manner. The adjustments via the I C bus control include preset-only items and variable data.
  • Page 4 Y-DELAY OFFSET MISC. ADJ. ADJ. OPTION OPTION MODE MODE MODE MODE ↓ ↓ ↓ ↓ ↓ Y-Delay time for PAL (TV) (DL-PT) COLOUR OFFSET (PAL) (COL-OP) Bass Mix for AN7396K (BM-ON) Sound system M (S-M) Forced V-SYNC slicing level (FSL) ↓...
  • Page 5 USER DATA IN SERVICE MODE After short TP1001 & TP1002, and turn on the MAIN POWER switch, read data from EEPROM address * While SERVICE mode ON, EEPROM DATA will switch to the service data. 00H ~ 03H, and compare to the list below, if different, initialize the EEPROM. Also, once SERVICE mode OFF, EEPROM will switch back to previous USER DATA.
  • Page 6 EEPROM ITEMS DATA LENGTH INITIAL DATA FIX/ADJ REMARK EEPROM ITEMS DATA LENGTH INITIAL DATA FIX/ADJ REMARK COLOUR OFFSET (PAL) COL-OP 0 ~ 15 Forced V-SYNC slicing level 0(DISABLE)/1(ENABLE) COLOUR OFFSET (SECAM) COL-OS 0 ~ 15 Sync of OSD 0 FOR Ph1 / 1 FOR Ph2 COLOUR OFFSET (NTSC358) COL-O3 0 ~ 15...
  • Page 7 INITIAL SETTING SHIPPING SETTING & CHECKING In service mode, after execute select POS 1, store the following tuning data in EEPROM. THE FOLLOWING DEFAULT DATA HAS BEEN FACTORY-SET FOR THE EEPROM. MCL1 MCL2 ITEMS DATA SETTING CH-NO Fv (MHz) SOUND SYS CH-NO Fv (MHz) SOUND SYS...
  • Page 8 PIF ADJUSTMENT SIF (NICAM/IGR) ADJUSTMENT No. Adjusting point Adjusting procedure/conditions Waveform and others No. Adjusting point Adjusting procedure/conditions Waveform and others *For model Tuner IFT 1. Get the tuner ready to receive the CH. E - 9 VCO COIL 1. Receive “PAL colour bar” signal.(E-69) ( PRESET ) signal,but with no signal input.
  • Page 9 PURITY ADJUSTMENT CONVERGENCE ADJUSTMENT No. Adjusting point Adjusting procedure/conditions Waveform and others No. Adjusting point Adjusting procedure/conditions Waveform and others PURITY ADJ. 1. Receive the GREEN-ONLY signal. Adjust the CONVERGENC 1. Receive the "Crosshatch Pattern" signal. beam current to ~700 µA. ADJ.
  • Page 10 CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT Note: This adjustment must be done after *18000ºK warming up the unit for 30 minutes or DRI-GW = "DRI-GS" DATA -7 No. Adjusting point Adjusting procedure/conditions Waveform and others µ longer with a beam current over 700 DRI-BW = "DRI-BS"...
  • Page 11 FOCUS ADJUSTMENT NTSC CHROMA ADJUSTMENT No. Adjusting point Adjusting procedure/conditions Waveform and others No. Adjusting point Adjusting procedure/conditions Waveform and others Focus 1. Receive the “Monoscope Pattern” signal. SUB-TINT (I2C 1. Receive the "NTSC3.58 Colour Bar" signal 2. Press R/C to set Picture NORMAL condition. BUS CON- through AV in.
  • Page 12 FUNCTION OPERATION CHECKING (VIDEO AND AUDIO) FUNCTION OPERATION CHECKING (VIDEO AND AUDIO) (Continued) No. Adjusting point Adjusting procedure/conditions Waveform and others No. Adjusting point Adjusting procedure/conditions Waveform and others CONTRAST 1. Receive "Monoscope Pattern" signal. 2. Set P-Mode to select CONTRAST. TREBLE 1.

  • Page 13: Hotel Mode Application

    FUNCTION OPERATION CHECKING (VIDEO AND AUDIO) HOTEL MODE APPLICATION (Continued) How to enable/disable the "Hotel Mode" ? No. Adjusting point Adjusting procedure/conditions Waveform and others Ans: a) Press the Menu key. NOISE MUTE 1. Receive "PAL COLOUR BAR" signal. b) Using the CH UP or CH DW key, move the cursor to FEATURE. Press the VL UP or VL DW key. CHECKING 2.

  • Page 14: Memory Map

    21C-FX1(C)/(G) 21C-FX5/FX8 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 00-3F AGC TAKE-OVER 00-3F...
  • Page 15 21C-FX1(C)/(G) 21C-FX5/FX8 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 BM-ON 00-0F BM-EFFECT...
  • Page 16 21C-FX1(C)/(G) 21C-FX5/FX8 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 00-FF FAVOURITE PROGRAM CYAN 00-01...
  • Page 17 21C-FX1(C)/(G) 21C-FX5/FX8 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 IGR_ST 5 IGR_ST 6 IGR_ST 7...
  • Page 18 21C-FX1(C)/(G) 21C-FX5/FX8 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 NIC_3D 37 NIC_3D 38 NIC_3D 39...
  • Page 19 21C-FX1(C)/(G) 21C-FX5/FX8 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) S-SYS (auto) C-SYS...
  • Page 20 21C-FX1(C)/(G) 21C-FX5/FX8 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) S-SYS (auto) C-SYS...
  • Page 21 21C-FX1(C)/(G) 21C-FX5/FX8 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) POS 56 TUNING FREQUANCY (LOWER PART) S-SYS...
  • Page 22 21C-FX1(C)/(G) 21C-FX5/FX8 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) S-SYS (auto) C-SYS...
  • Page 23 21C-FX1(C)/(G) 21C-FX5/FX8 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) S-SYS (auto) C-SYS...
  • Page 24 21C-FX1(C)/(G) 21C-FX5/FX8 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 21C-FX1(C)/(G) 21C-FX5/FX8 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

    TROUBLE SHOOTING TABLE TROUBLE SHOOTING TABLE (Continued) NO RASTER CIRCUITS TO BE CHECKED: NO PICTURE, NO SOUND » Tuner. » PIF. » Automatic Gain Control. » (5V), (32V) Power Source. Check F701. Blown out. Does the noise level increase at max. Contrast, Brightness and Sound controls ? Replace the fuse.
  • Page 27 TROUBLE SHOOTING TABLE TROUBLE SHOOTING TABLE (Continued) (Continued) NO SPECIFIC COLOUR NEITHER VERTICAL NOR HORIZONTAL SYNCHRONIZATION Is some colour produced in B/W broadcast reception ? CIRCUIT TO BE CHECKED: » Sync. Separator Circuit. Check pins(33) and (34) of IC801. Is the white balance properly Check IC801, R801, R802, adjusted ? R803, D804, D805, D806...

  • Page 28: Solid State Device Base Diagram

    21C-FX1(C)/(G) 21C-FX5/FX8 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 DX0386CE 2SA1015 ANODE (RED)

  • Page 29: Waveforms

    21C-FX1(C)/(G) 21C-FX5/FX8 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 5.72 Vp-p 55.2 Vp-p...

  • Page 30: Schematic Diagram Crt Unit

    21C-FX1(C)/(G) 21C-FX5/FX8 SCHEMATIC DIAGRAM: CRT Unit...
  • Page 31 21C-FX1(C)/(G) 21C-FX1(C)/(G) 21C-FX5/FX8 21C-FX5/FX8 SCHEMATIC DIAGRAM: MAIN Unit -1/2 (MODEL 21C-FX1(C)/(G) )
  • Page 32 21C-FX1(C)/(G) 21C-FX1(C)/(G) 21C-FX5/FX8 21C-FX5/FX8 SCHEMATIC DIAGRAM: MAIN Unit -1/2 (MODEL 21C-FX5/FX8 )
  • Page 33 21C-FX1(C)/(G) 21C-FX1(C)/(G) 21C-FX5/FX8 21C-FX5/FX8 SCHEMATIC DIAGRAM: MAIN Unit -2/2...
  • Page 34 21C-FX1(C)/(G) 21C-FX1(C)/(G) 21C-FX5/FX8 21C-FX5/FX8 SCHEMATIC DIAGRAM: NICAM Unit (MODEL 21C-FX5/FX8 )
  • Page 35 21C-FX1(C)/(G) 21C-FX1(C)/(G) 21C-FX5/FX8 21C-FX5/FX8 BLOCK DIAGRAM - 1/3:MAIN BLOCK MODEL 21C-FX1(C)/1(G) PWB-A MAIN BLOCK...
  • Page 36 21C-FX1(C)/(G) 21C-FX1(C)/(G) 21C-FX5/FX8 21C-FX5/FX8 BLOCK DIAGRAM - 2/3:MAIN BLOCK MODEL 21C-FX5/FX8 PWB-A MAIN BLOCK...
  • Page 37 21C-FX1(C)/(G) 21C-FX5/FX8 BLOCK DIAGRAM - 3/3: CRT / NICAM BLOCK PWB-B CRT BLOCK PWB-C NICAM BLOCK (MODEL 21C-FX5/FX8)

  • Page 38: Main Unit

    21C-FX1(C)/(G) 21C-FX5/FX8 Ref. No. Part No. Description Code Ref. No. Part No. Description Code IC751 VHiTA48M033-1 R TA48M033F PARTS LIST IC752 VHiKA7805AP-1 R KIA7805API IC753 VHiSE120N//-1 R SE120N IC801 RH-iX3410CEN5 R I.C. (21C-FX1(C)/(G), FX8) PARTS REPLACEMENT IC801 RH-iX3412CEN5 R I.C. (21C-FX5) IC1003 VHiM24C08W/-1 R M24C08-WBN6 Replacement parts which have these special safety characteristics...
  • Page 39 21C-FX1(C)/(G) 21C-FX5/FX8 Ref. No. Part No. Description Code Ref. No. Part No. Description Code D707 VHD1SS82///1A R 1SS82 CAPACITORS D708 RH-DX0400CEZZ R Diode C200 VCEA0A1CW476M R 47 Electrolytic D709 RH-DX0164CEZZ R Diode C203 VCKYCY1HF103Z R 0.01 Ceramic D710 RH-EX0601GEZZ R Zener Diode C204 VCEA0A1CW108M R 1000 16V Electrolytic...
  • Page 40 21C-FX1(C)/(G) 21C-FX5/FX8 Ref. No. Part No. Description Code Ref. No. Part No. Description Code C371 VCEA0A1CW476M R 47 Electrolytic C708 RC-KZ0029CEZZ R 0.01 250V Ceramic C372 VCEA0A1CW106M R 10 Electrolytic C709 VCQYTA1HM471J R 470p 50V Mylar C375 VCEA0A1HW225M R 2.2 Electrolytic C711 RC-KZ0039CEZZ...
  • Page 41 21C-FX1(C)/(G) 21C-FX5/FX8 Ref. No. Part No. Description Code Ref. No. Part No. Description Code RJ46 VRS-CY1JF000J 1/16W Metal Oxide R339 VRS-CY1JF564J R 560k 1/16W Metal Oxide RJ47 VRS-CY1JF000J 1/16W Metal Oxide R340 VRS-CY1JF102J R 1k 1/16W Metal Oxide RJ55 VRS-CY1JF000J 1/16W Metal Oxide R341 VRD-RA2BE102J...
  • Page 42 21C-FX1(C)/(G) 21C-FX5/FX8 Ref. No. Part No. Description Code Ref. No. Part No. Description Code R625 VRD-RM2HD184J R 180k 1/2W Carbon R1022 VRD-RA2BE101J R 100 1/8W Carbon R626 VRS-CY1JF472J R 4.7k 1/16W Metal Oxide R1023 VRS-CY1JF101J R 100 1/16W Metal Oxide R628 VRD-RM2HD820J R 82 1/2W...

  • Page 43: Nicam Unit

    21C-FX1(C)/(G) 21C-FX5/FX8 Ref. No. Part No. Description Code Ref. No. Part No. Description Code FILTERS PWB-B DUNTK9990WEC2/C3/B9/C4 SF2300 RFiLC0016PEZZ R Filter CRT UNIT TRANSFORMERS TRANSISTORS T2300 RCiLD0231CEZZ R Detection Coil Q870 RH-TX0110BMZZ+ R TX0110BM Q871 RH-TX0110BMZZ+ R TX0110BM CAPACITORS Q872 RH-TX0110BMZZ+ R TX0110BM Q883 RH-TX0124BMZZ+ R TX0124BM...

  • Page 44: Miscellaneous Parts

    MSPRC0005PEFW R Power button Spring R2354 VRS-CY1JF225J R 2.2M 1/16W Metal Oxide GCOVA0145PESA R R/C Cover R2355 VRS-CY1JF101J R 100 1/16W Metal Oxide HBDGB3142CESA R SHARP Badge R2356 VRS-CY1JF102J R 1k 1/16W Metal Oxide GDORF0196PESA R Door R2357 VRS-CY1JF122J R 1.2k 1/16W Metal Oxide...

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