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Sharp 25VT-CK10 Service Manual Download Page 33

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25VT-K100
25VT-CK10

25VT-K100
25VT-CK10

SCHEMATIC DIAGRAM : MAIN Unit (VCR Section)

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Summary of Contents for 25VT-CK10

Page 1: ...REPLACEMENT AND ASSEMBLY OF MECHANICAL UNITS Refer to 13VT J100 Service Manual æ ADJUSTMENT OF THE VCR ELECTRICAL CIRCUITRY Refer to 13VT J100 Service Manual æ TROUBLESHOOTING Refer to 13VT J100 Service Manual æ TROUBLESHOOTING OF TV SECTION 17 æ CHASSIS LAYOUT 20 æ BLOCK DIAGRAM OF TV SECTION 23 æ BLOCK DIAGRAM OF VCR SECTION Refer to 13VT J100 Service Manual æ OVERALL SCHEMATIC DIAGRAM 27 æ DESC...

Page 2: ... power receptacle when servicing this chassis X RADIATION AND HIGH VOLTAGE LIMITS 1 Be sure all service personnel are aware of the procedures and instructions covering X radiation The only potential source of X ray in current solid state TV receivers is the picture tube However the picture tube does not emit measurable X Ray radiation if the high voltage is as specified in the High Voltage Check i...

Page 3: ...l parts in the receiver 2 Inspect all protective devices such as non metallic control knobs insulating materials cabinet backs adjustment and compartment covers or shields isolation resistor capacity networks mechanical insulators etc 3 To be sure that no shock hazard exists check for leakage current in the following manner Plug the AC cord directly into a 120 volt AC outlet using reverse polarity...

Page 4: ...tre que celui spécifié et ne pas effectuer de modifications déconseillées du circuit à haute tension 6 Lors de la recherche des pannes et des mesures d essai sur un récepteur qui présente une haute tension excessive éviter de s approcher inutilement du récepteur Ne pas faire fonctionner le récepteur plus longtemps que nécessaire pour localiser la cause de la tension excessive AVERTISSEMENT 1 N ent...

Page 5: ...nt étalonnées pour haute tension puissance etc Les pièces de remplacement qui présentent ces caractéristiques sont identifiées dans ce manuel les pièces électriques qui présentent ces particularités sont PRECAUTIONS A PRENDRE LORS DE LA REPARATION Suite 1 Inspecter tous les faisceaux de câbles pour s assurer que les fils ne soient pas pincés ou qu un outil ne soit pas placé entre le châssis et les...

Page 6: ...balanced TUNING RANGES VHF Channels 2 thru 13 UHF Channels 14 thru 69 CATV Channels 1 14 thru 125 EIA Channel Plan VCR SECTION Format VHS Standard Video Recording System Rotary Two Head Helical Scanning Number of Video Heads 2 pcs Video Signal Standard NTSC Color System Tape Width 12 7mm 1 2inch Tape Speed SP 33 35mm sec 1 31i p s LP 16 67mm sec 0 66i p s Play back only EP 11 12mm sec 0 44i p s Ma...

Page 7: ...25VT K100 25VT CK10 7 LOCATION OF USER S CONTROL ...

Page 8: ...25VT K100 25VT CK10 8 Location Of Control s Buttons Remote Control LOCATION OF USER S CONTROL Continued ...

Page 9: ...cover 2 Take out the anode cap CRT PWB connectors K M and RC coating ground SP chip fixing screws and others 3 Remove the 2 main PWB fixing screws and take out the main PWB unit and the VCR unit 4 Remove the 7 VCR fixing screws and detach the shielding case DISASSEMBLY AND REASSEMBLY ...

Page 10: ...using control fixing screws and detach the cassette housing control 6 Remove the 4 mechanism chassis fixing screws and detach the mechanism chassis PWB 7 Remove the 8 main PWB fixing screws and detach the main PWB DISASSEMBLY AND REASSEMBLY Continued ...

Page 11: ... servicing any of the components inside disconnect the lead dressing holder Position the main PWB unit upright as shown below and connect the leads for starting the services Note Fit the VCR unit into the front cabinet with the front flap door tilted at 70 80 70 80 ...

Page 12: ...4 Apply external 13 5V DC at TP653 by using an external DC supply The increased voltage will cause the horizontal oscillator to stop and the TV to shut off 5 To re start the osillator remove the external DC power supply and short together TP651 and TP652 Once the TV set operates normally again remove the short between TP651 and TP652 HIGH VOLTAGE CHECK High voltage is not adjustable but must be ch...

Page 13: ...the reset function in the video adjust menu to ensure customer controls are in their proper reset position To enter the service mode While pressing the Ch up S2507 button Plug the AC cord into a wall socket Now theTV set is switched on and enters the service mode When successfully entered the service mode will be displayed as shown in Figure A The SERVICE MODE figure the top line stands for servic...

Page 14: ...be only PICTURE 16 0 63 TINT 39 0 77 COLOR 13 0 63 BRIGHT 32 0 63 SHARP 7 0 13 V PHASE 0 0 7 H PHASE 20 0 31 RF AGC 32 0 63 V AMP 32 0 63 PIF VCO 40 0 127 R CUT OFF 0 0 255 G CUT OFF 0 0 255 B CUT OFF 0 0 255 G GAIN 128 0 255 B GAIN 128 0 255 MUTE 0 0 2 0 Normal raster 1 no Y 2 No Vertical BALANCE 32 0 63 TEXT POSITION 28 0 128 TEXT PICTURE 20 0 1 CCD LEVEL 7 0 10 OPTION 1 0 3 DATA INTIAL VALUE RA...

Page 15: ...rightness level SERVICE ADJUSTMENT VCO Adjustment 1 Connect a digital voltmeter between pin 44 of IC401 and ground 2 Select a good local channel 3 Enter the service mode select adjustment PIF VCO and data value 64 4 Adjust the VCO coil T201 so that the digital voltmeter reads 2 5 volts 5 Adjustment is complete remove the voltmeter return to normal mode RF AGC Adjustment 1 Have unit receive a good ...

Page 16: ...ion adjustment 1 Have unit receive a good local channel 2 Enter the service mode and select service adjustment H PHASE 3 Adjust H PHASE data value so that picture is centered Caption position adjustment hori zontal 1 Have unit receive a good local channel 2 Enter the service mode and select service adjustment TEXT POSITION 3 A black text box appears on the screen see Figure B 4 Adjust TEXT POSITIO...

Page 17: ...een 2 and 3 of IC701 Check D701 thru D704 L701 R701 and F701 Is AC cord connected Is 170V DC applied to C705 Check T701 and adjacent parts Is 16V DC applied to pin 4 of IC701 Check R708 and IC701 Check IC701 and adjacent parts CRT connector GC1 GC5 bias check The Fuse is again blown out D701 D702 D703 D704 D705 Connect AC cord F701 Check Normal Normal IC701 Check Normal Abnomal IC401 iX2933CE Norm...

Page 18: ...k the IC401 and adjacent parts Check IC2001 Check the Tuner AGC Check the IC351 Does the noise level increase at max Contrast Brightness and Sound Control Is there a signal at pin 43 of IC401 noise increases but no signal is received Is there a signal at pin 41 of IC401 Picture noise decrease but sound level varies greatly Check the tuner bias Normal Abnormal Abnormal Check the IC401 Normal Check ...

Page 19: ...Replace the infrared remote control as required Check pin 10 of IC2001 and or receiver Reposition the set not to be exposed to strong light Is L pulse given out of pin 1 of the receiver and received at pin 4 of IC2001 when the infrared remote control is activated No operation is possible from the infrared remote control Does waveform appear at pin 8 of IC351 Check IC351 and adjacent parts Check IC...

Page 20: ...25VT K100 25VT CK10 20 H G F E D C B A 1 2 3 4 5 6 CHASSIS LAYOUT PWB F SENSOR UNIT PWB E POWER SW UNIT PWB D VCR KEY UNIT PWB B CRT UNIT PWB C SUB POWER UNIT 25VT CJ100 ONLY ...

Page 21: ...25VT K100 25VT CK10 21 H G F E D C B A 1 2 3 4 5 6 MODEL 25VT K100 PWB A MAIN UNIT ...

Page 22: ...25VT K100 25VT CK10 22 H G F E D C B A 1 2 3 4 5 6 MODEL 25VT CK10 PWB A MAIN UNIT ...

Page 23: ...H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 25VT K100 25VT CK10 25VT K100 25VT CK10 23 24 MODEL 25VT K100 BLOCK DIAGRAM OF TV SECTION ...

Page 24: ...H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 25VT K100 25VT CK10 25VT K100 25VT CK10 MODEL 25VT CK10 BLOCK DIAGRAM OF TV SECTION 25 26 ...

Page 25: ...H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 25VT K100 25VT CK10 25VT K100 25VT CK10 27 28 MODEL 25VT K100 OVERALL SCHEMATIC DIAGRAM ...

Page 26: ...H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 25VT K100 25VT CK10 25VT K100 25VT CK10 29 30 MODEL 25VT CK10 OVERALL SCHEMATIC DIAGRAM ...

Page 27: ...ated 2 All voltages measured with 1000µV B W or Color signal DESCRIPTION OF SCHEMATIC DIAGRAM å AND SHADED COMPONENTS SAFETY RELATED PARTS ç MARK X RAY RELATED PARTS DRGANNES MARQUES ET HACHRES PIECES RELATIVES A LA SECURITE MARQUE ç PIECS RELATIVE AUX RAYONS X This circuit diagram is a standard one printed circuits may be subject to change for product improvement without prior notice WAVEFORM MEA...

Page 28: ...H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 25VT K100 25VT CK10 25VT K100 25VT CK10 33 34 MODEL 25VT K100 SCHEMATIC DIAGRAM MAIN Unit TV Section ...

Page 29: ...H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 25VT K100 25VT CK10 25VT K100 25VT CK10 35 36 ...

Page 30: ...H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 25VT K100 25VT CK10 25VT K100 25VT CK10 37 38 MODEL 25VT CK10 SCHEMATIC DIAGRAM MAIN Unit TV Section ...

Page 31: ...H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 25VT K100 25VT CK10 25VT K100 25VT CK10 40 39 ...

Page 32: ...H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 25VT K100 25VT CK10 25VT K100 25VT CK10 41 42 SCHEMATIC DIAGRAM MAIN SENSOR Unit VCR Section ...

Page 33: ...H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 25VT K100 25VT CK10 25VT K100 25VT CK10 SCHEMATIC DIAGRAM MAIN Unit VCR Section 43 44 ...

Page 34: ...H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 25VT K100 25VT CK10 25VT K100 25VT CK10 PWB A MAIN Unit Wiring Side 45 46 PRINTED WIRING BOARD ASSEMBLIES ...

Page 35: ...H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 25VT K100 25VT CK10 25VT K100 25VT CK10 PWB A MAIN Unit Chip Parts Side 47 48 ...

Page 36: ...8 9 10 11 12 25VT K100 25VT CK10 25VT K100 25VT CK10 PWB B CRT Unit Wiring Side PWB D VCR KEY Unit Wiring Side Side PWB E POWER SW Unit Wiring Side PWB F SENSOR Unit Wiring Side PWB C SUB POWER Unit Wiring Side 25VT CK10 ONLY 49 50 ...

Page 37: ... TUNER NOTE THE PARTS HERES SHOWN ARE SUPPLIED AS AN ASSEM BLY NOT INDEPENEDTLY å TU51 VTUVTST6UF78 J Tuner BD INTEGRATED CIRCUITS IC351 VHiTDA7233 1 J TDA7233 AF çå IC401 RH iX2933CEZZ J TA1268N AX IC402 RH iX2345CEZZ J TA8822SN AG å IC501 VHiTA8403K 1 J TA8403K AL å IC701 VHiSTRF65152E J STR F6515 AV å IC702 RH FX0034CEZZ J PC817 AE or RH FX0029CEZZ IC703 RH FX0034CEZZ J PC817 AE or RH FX0018CEZ...

Page 38: ...RH EX0603GEZZ J Zener Diode AA D421 RH EX0393GEZZ J Zener Diode AB D451 RH EX0616GEZZ J Zener Diode AA D455 VHD1SS119 1 J Diode AB D457 RH EX0631GEZZ J Zener Diode AA D501 RH DX0441CEZZ J Diode AC å D502 RH DX0131CEZZ J Diode AC çå D651 VHD1SS82 1A J Diode AC çå D652 VHD1SS119 1 J Diode AB çå D653 RH EX0628GEZZ J Zener Diode AC å D701 RH DX0154CEZZ J Diode AC å D702 RH DX0154CEZZ J Diode AC å D703...

Page 39: ... 1 0 50V EL AB C54 VCEAKA1HW225M J 2 2 50V EL AB C55 VCEA0A0JW477M J 470 6 3V EL AC C201 VCKYCY1EB103K J 0 01 25V Ceramic AA C202 VCKYCY1EB103K J 0 01 25V Ceramic AA C203 VCKYCY1EB103K J 0 01 25V Ceramic AA C204 VCKYCY1CF104Z J 0 1 16V Ceramic AA C205 VCEAKA1HW474M J 0 47 50V EL AB C206 VCEA0A1CW477M J 470 16V EL AC C207 VCKYCY1HF103Z J 0 01 50V Ceramic AA C208 VCEAKA1HW474M J 0 47 50V EL AB C209 ...

Page 40: ...AKA1CW226M J 22 16V EL AB C759 VCEA0A1CW476M J 47 16V EL AB C760 VCEA0A1CW476M J 47 16V EL AB C768 VCEA0A1CW476M J 47 16V EL AB C769 VCEA0A1CW476M J 47 16V EL AB C775 VCKYPA1HB102K J 1000p 50V Ceramic AA C801 VCKYCY1EB223K J 0 022 25V Ceramic AA C802 VCEAKA1HW105M J 1 0 50V EL AB C803 VCCCCY1HH100D J 10p 50V Ceramic AA C804 VCKYCY1EB103K J 0 01 25V Ceramic AA C805 VCKYCY1EB103K J 0 01 25V Ceramic ...

Page 41: ...50V Ceramic AA C6604 VCEAKA1CW106M J 10 16V EL AB C6605 VCEAKA1CW476M J 47 16V EL AB C6606 VCKYCY1HB681K J 680p 50V Ceramic AA C6607 VCEAKA1HW475M J 4 7 50V EL AB C6608 VCEAKA1CW106M J 10 16V EL AB C6609 VCQYTA1HM683K J 0 068 50V Mylar AB C6612 VCQYTA1HM183K J 0 018 50V Mylar AB C6615 VCEAKA1HW335M J 3 3 50V EL AB C6616 VCKYCY1HB102K J 1000p 50V Ceramic AA C6617 VCEAKA1CW106M J 10 16V EL AB C6618 ...

Page 42: ...2k 1 16W M Ox AA R307 VRS CY1JF152J J 1 5k 1 16W M Ox AA R308 VRS CY1JF271J J 270 1 16W M Ox AA R313 VRS CY1JF000J J 00 1 16W M Ox AA R315 VRS CY1JF221J J 220 1 16W M Ox AA R319 VRS CY1JF223J J 22k 1 16W M Ox AA R320 VRS CY1JF103J J 10k 1 16W M Ox AA R327 VRS VV3DB120J J 12 2W M Ox AA R342 VRD RA2BE223J J 22k 1 8W Carbon AA R344 VRS CY1JF332J J 3 3k 1 16W M Ox AA R346 VRD RA2BE221J J 220 1 8W Carb...

Page 43: ... 150 1 8W Carbon AA R749 VRD RA2EE561J J 560 1 4W Carbon AA R751 VRD RA2BE104J J 100k 1 8W Carbon AA R752 VRD RM2HD104J J 100k 1 2W Carbon AA R753 VRD RA2BE223J J 22k 1 8W Carbon AA R754 VRD RA2BE563J J 56k 1 8W Carbon AA R756 VRD RM2HD221J J 220 1 2W Carbon AA R757 VRD RA2BE683G J 68k 1 8W Carbon AA R766 VRD RA2BE102J J 1 0k 1 8W Carbon AA R775 VRD RM2HD123J J 12k 1 2W Carbon AA R776 VRD RM2HD123...

Page 44: ...E102J J 1 0k 1 8W Carbon AA R3141 VRS CY1JF103J J 10k 1 16W M Ox AA R3142 VRS CY1JF681J J 680 1 16W M Ox AA R3143 VRD RA2BE562J J 5 6k 1 8W Carbon AA R3144 VRS CY1JF562J J 5 6k 1 16W M Ox AA R3145 VRS CY1JF562J J 5 6k 1 16W M Ox AA R3157 VRD RA2BE221J J 220 1 8W Carbon AA R3162 VRS CY1JF472J J 4 7k 1 16W M Ox AA R3163 VRD RA2BE222J J 2 2k 1 8W Carbon AA R3167 VRD RA2BE221J J 220 1 8W Carbon AA R31...

Page 45: ...k 1 16W M Ox AA R7772 VRD RA2BE102J J 1 0k 1 8W Carbon AA R7773 VRD RA2BE102J J 1 0k 1 8W Carbon AA R7774 VRS CY1JF681J J 680 1 16W M Ox AA R7775 VRS CY1JF332J J 3 3k 1 16W M Ox AA R7776 VRS CY1JF102J J 1 0k 1 16W M Ox AA R7781 VRS CY1JF103J J 10k 1 16W M Ox AA R7782 VRD RA2BE102J J 1 0k 1 8W Carbon AA R7788 VRS CY1JF103F J 10k 1 16W M Ox AA R7789 VRS CY1JF332J J 3 3k 1 16W M Ox AA R7790 VRS CY1JF...

Page 46: ...CEFD J Screw AA LX BZ3100CEFD J Screw AA LX BZ3100CEFD J Screw AA LX TZ3004CEFD J Screw AA TRANSISTORS Q853 VS2SC3619LB1E J AD Q854 VS2SC3619LB1E J AD Q855 VS2SC3619LB1E J AD Q894 VS2SA1266 Y 1 J AA DIODES D850 VHD1SS119 1 J Diode AB D851 VHD1SS119 1 J Diode AB D852 VHD1SS119 1 J Diode AB D894 VHD1SS119 1 J Diode AB D895 VHD1SS119 1 J Diode AB D898 VHD1SS119 1 J Diode AB COIL L851 VP MK820K0000 J ...

Page 47: ... DUNTK9055WEV9 POWER SW UNIT RESISTORS R2502 VRD RA2BE103J J 10k 1 8W Carbon AA R2503 VRD RA2BE223J J 22k 1 8W Carbon AA R2504 VRD RA2BE563J J 56k 1 8W Carbon AA SWITCHES S2501 QSW K0094GEZZ J Stop Eject AC S2502 QSW K0094GEZZ J Play AC S2503 QSW K0094GEZZ J FF AC S2504 QSW K0094GEZZ J REW AC MISCELLANEOUS PARTS P2501 QPLGN0278GEZZ J Plug 2pin RC AA QCNW 1942PEZZ R Connecting Cord AE PWB D DUNTK90...

Page 48: ...ing 31 MSPRT0403AJFJ V Pinch Double Action AD Spring 33 MSPRT0405AJFJ V Tension Spring AE 34 NBLTK0067AJ00 V Drive Belt AE 35 NDAiV1070AJ00 V Reel Disk AE 36 NGERH1267AJZZ V Loading Connect Gear AD 37 NGERH1268AJ00 V Master Cam AE 38 NGERH1269AJZZ V Casecon Drive Gear AD 39 NGERH1270AJZZ V Take Up Loading Gear AF 40 NGERH1271AJZZ V SupplyLoading Gear AD 41 NGERH1272AJZZ V Pinch Drive Cam AE 42 NGE...

Page 49: ...SM CHASSIS PARTS 66 62 62 66 63 67 53 66 64 65 26 57 55 201 56 59 28 28 202 202 16 200 207 207 49 7 218 8 200 49 11 216 203 5 41 61 3 17 216 38 21 208 37 9 30 36 39 216 45 48 27 40 30 10 23 43 216 217 35 46 42 35 215 209 210 211 212 213 4 52 2 58 206 15 33 1 50 34 54 60 47 51 44 6 205 204 24 25 22 12 31 214 19 68 29 18 20 ...

Page 50: ... 7 AD 214 PSPAP0009AJZZ V Reverse Guide AB Adjusting Nut 215 LX WZ1003GE00 J Cut Washer AA 216 LX WZ1041GE00 J Cut Washer AA 217 LX WZ1073GE00 J Cut Washer AB 218 XBPSD30P08J00 J Drum Base Mounting AA Screw SW3P 8S 300 CHLDX3074TEV0 V Cassette Housing AX Control Ass y 301 LANGF9592AJFW V Upper Plate AL 302 LHLDX1028AJ00 V Frame L AH 303 LHLDX1029AJ00 V Frame R AH 304 LHLDX1030AJZZ V Holder L AE 30...

Page 51: ...t No Description Code Ref No Part No Description Code 25VT K100 25VT CK10 65 H G F E D C B A 1 2 3 4 5 6 CASSETTE HOUSING CONTROL PARTS 304 301 311 311 305 308 302 313 306 309 303 310 317 314 312 307 315 316 300 ...

Page 52: ...ASD30P12000 J Screw AA 12 LX TZ3011CEFD J Screw AA 13 VSP0080PBK98A J Speaker AP 14 XTASD40P16000 J Screw AA 15 GCABB1143MEKA M Cabinet Rear 16 XTASD40P20000 J Screw x6 AA 17 LHLDZ0094PEZZ R Sensor Holder AC 18 LX HZ3001PEFD R Screw AA 19 XHPSD30P06WS0 J Screw AA 20 LCHSM0056PEKZ R Chassis Frame AW 21 PSLDM0215PEFW R Shield Case Top AQ 22 PSLDM0202PEFW R Shield Case Bottom AK 23 PSLDM0205PEFW R Sh...

Page 53: ...H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 25VT K100 25VT CK10 25VT K100 25VT CK10 67 68 CABINET AND MECHANICAL PARTS ...

Page 54: ... AR TGAN 1006MEZZ M Guarantee Card AA 25VT K100 TiNS 6348MEZZ M Operation Manual AD 25VT K100 TCAUH3025MEZZ M Safety Tip AA 25VT K100 TiNS 6349MEZZ M Operation Manual AE 25VT CK10 Ref No Part No Description Code Ref No Part No Description Code PACKING OF THE SET SETTING POSITIONS OF THE KNOBS Power SW OFF Channel 2ch S Volume About 20 50 REAR Use tapes to fix the packing case Packing case FRONT Bu...

Page 55: ...25VT K100 25VT CK10 71 Memo ...

Page 56: ...25VT K100 25VT CK10 72 TQ0452 S YO IK Printed in Japan ...

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