Sharp 21GT-22 Page 28 Service Manual Download | Manualshive

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PWB-A: MAIN UNIT (Copper Side)

PRINTED WIRING BOARD ASSEMBLIES

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Summary of Contents for 21GT-22

Page 1: ... 15 SOLID STATE DEVICE BASE DIAGRAM 18 WAVEFORMS 19 CHASSIS LAYOUT 20 BLOCK DIAGRAM 21 DESCRIPTION OF SCHEMATIC DIAGRAM 25 SCHEMATIC DIAGRAM Ë MAIN UNIT 26 Ë CRT UNIT 28 Page Ë HEADPHONE UNIT 28 Ë MONO BILINGUAL UNIT 29 PRINTED WIRING BOARD ASSEMBLIES 30 REPLACEMENT PARTS LIST Ë ELECTRICAL PARTS MAIN UNIT 36 CRT UNIT 39 HEADPHONE UNIT 39 MONO BILINGUAL UNIT 39 Ë SUPPLIED ACCESSORIES 40 Ë PACKING P...

Page 2: ... NOTES Maintenance and repair of this receiver should be done by qualified service personnel only SERVICING OF HIGH VOLTAGE SYSTEM AND PICTURE TUBE When servicing the high voltage system remove static charge from it by connecting a 10k ohm Resistor in series with an insulated wire such as a test probe between picture tube dag and 2nd anode lead AC line cord should be disconnected from AC outlet 1 ...

Page 3: ...Note Once the chassis has been assembly together and ready to be POWER ON for the FIRST TIME make sure to make a short circuit 137 and 138 switch to the service mode position first and then turn on the main power switch See 2 1 above Precaution If haven t done this initiation it may possibly generate excessive Beam current 3 For reference please check with memory map GA1 Series type RH iX3368CE Ë ...

Page 4: ...SC 3 58 F N358 FE RF NTSC 4 43 F N443 FE RF SECAM F SECAM VIDEO MUTE AT IDENT LOSS VMI VIDEO MUTE AT PROGRAM SOURCE CHANGE VMC HOTEL MODE HTL REDUCED FM DEMODULATION GAIN FOR BTSC SIGNAL BTSC A A NUMBER OF EXT AV SOURCE AV FM WINDOW SELECTION FMWS SOUND MUTE BIT 0 SM0 SOUND MUTE BIT 1 SM1 THAI LANGUAGE THA ARABIC LANGUAGE ARA MALAY LANGUAGE MAL CHINESE LANGUAGE CHI FRENCH LANGUAGE FRE RUSSIAN LANG...

Page 5: ...ATA WITHOUT SPECIFIC INSTRUCTION Please set the EEPROM initial data according to the value in parenthesis before adjustment 2 2 CDL ADJUST 7 3 3 S COR ADJUST 20 4 4 After SUB COLOUR ADJUSTMENT ADD 6 STEPS INTO THE DATA OF SUB COL NEW SUB COL SUB COL DATA OF 75 WHITE RED PORTIONS AT SAME LEVEL 6 STEPS EEPROM ITEMS OSD DATA LENGTH INITIAL DATA FIX ADJ REMARK SHARPNESS OFFSET NTSC358 SHP O3 0 15 12 F...

Page 6: ...to 63 67dBµV and make sure there is no noise 5 Turn up the input signal to 90 95 dBµV to be sure that there is no cross modulation beat Note For the 50 ohm signal strength gauge when not using 50 75 impedance adapter signal strength is 52 1 dB µ V 75 ohm open instead of 57 1 dB µ V 75 ohm open Precaution The loss of using impedance adapter Bias box About 4 5 V Oscilloscope 0 1V TV Set Bias box TP2...

Page 7: ...CE ADJUSTMENT NO Adjustment part Adjusting procedure and conditions Waveform and others 1 CONVERGENCE ADJ To be done after the purity adjustment 1 Receive the Crosshatch Pattern signal 2 Using the remote controller call NORMAL mode Static convergence 1 Turn the 4 pole magnet to a proper opening angle in order to superpose the blue and red colours 2 Turn the 6 pole magnet to a proper opening angle ...

Page 8: ...e UP DOWN by Volume key LOW HIGH 21 10cd m2 120cd m2 4 Max beam check 1 Receive the Monoscope Pattern signal 2 Press R C to set Picture NORMAL condition 3 Connect the DC miliammeter between TP603 TP602 Full Scale 3 mA Range 4 Beam current must be within 1100 100 µA 1 2 3 4 5 t 3 2Vdc 0 Alternative Procedure 1 Step 1 2 3 and 4 are same as beside procedure 2 Then continue adjust until retrace line a...

Page 9: ... each mode If connect input to Front and Rear AV terminal input terminal of Front AV will be se lected 3 Other protectors 1 Once finish rectified Electrolytic Capacitor short testing in B line check all possible damaged components on B line Use random selected set for inspection Fig 1 1 W Y Cy G Mg R B SAME LEVEL FUNCTION OPERATION CHECKING VIDEO AND AUDIO NO Adjustment part Adjusting procedure an...

Page 10: ...volume control to maximum make sure the sound is heard from the speakers Then put the unit in no signal state 3 Check the sound mute is effective 4 Finally turn sound level of CTV to minimum 12 OSD LANGUAGE QUANTITY CHECK Check OSD LANGUAGE quantity and type TWO OSD LANGUAGE ENGLISH THAILAND 10 Sound system Receive PAL B G signal check the sound output to make sure it is working properly HEADPHONE...

Page 11: ... SM1 SM0 FMWS AV BTSC HTL VMC VMI 00 FF 47 HP2 FSL RUS FRA CHN MLY ARB THA 00 FF 48 AGC1 AGC0 BIL CPT FOB AV FOA AV FOB FE FOA FE NDF MSA LED F 00 FF 00 F3 49 4A 4B 4C VOLUME 01 00 3C 4D CONTRAST 3C 00 3C 4E COLOUR 1E 00 3C 4F BRIGHTNESS 1E 00 3C 50 TINT 1E 00 3C 51 SHARPNESS 1E 00 3C 52 53 54 55 POSITION AV1 AV2 01 00 FF 56 FAV POS A 0A 00 FF 57 FAV POS B 14 00 FF 58 FAV POS C 1E 00 FF 59 FAV POS...

Page 12: ...V FINAL LAST INITIAL SETTING DATA DEFAULT RANGE WRITE CPU CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE REMARK ADDRESS DATA HEX D7 D6 D5 D4 D3 D2 D1 D0 C0 TUNING FREQUANCY LOWER PART POS 25 C1 S SYS AFT auto C SYS C2 TUNING FREQUANCY HIGHER PART POS 26 C3 TUNING FREQUANCY LOWER PART C4 S SYS AFT auto C SYS C5 TUNING FREQUANCY HIGHER PART POS 27 C6 TUNING FREQUANCY LOWER PART C7 S SYS AFT auto C SYS ...

Page 13: ... FINAL LAST INITIAL SETTING DATA DEFAULT RANGE WRITE CPU CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE REMARK ADDRESS DATA HEX D7 D6 D5 D4 D3 D2 D1 D0 140 TUNING FREQUANCY HIGHER PART POS 68 141 TUNING FREQUANCY LOWER PART 142 S SYS AFT auto C SYS 143 TUNING FREQUANCY HIGHER PART POS 69 144 TUNING FREQUANCY LOWER PART 145 S SYS AFT auto C SYS 146 TUNING FREQUANCY HIGHER PART POS 70 147 TUNING FREQUA...

Page 14: ...o C SYS 19A TUNING FREQUANCY HIGHER PART POS 98 19B TUNING FREQUANCY LOWER PART 19C S SYS AFT auto C SYS 19D TUNING FREQUANCY HIGHER PART POS 99 19E TUNING FREQUANCY LOWER PART 19F S SYS AFT auto C SYS 1A0 AV1 1A1 1A2 auto C SYS 1A3 AV2 1A4 1A5 auto C SYS 1A6 1A7 1A8 1A9 1AA 1AB 1AC 1AD 1AE 1AF 1B0 1B1 1B2 1B3 1B4 1B5 1B6 1B7 1B8 1B9 1BA 1BB 1BC 1BD 1BE 1BF MODEL MODEL LETTER NO LETTER NO TUNING F...

Page 15: ... last ch which you received before power off same as normal operation CONDITION When using hotel mode user can control contrast brightness sharpness and tint function But after power off it will return to the initial setting You can t use Preset mode Fine tuning Skip mode System selection The others function is allowed to be used 1 Ch 1 is your selected channel for hotel mode Input 1 3 7 and 9 by ...

Page 16: ...eck pin 38 of IC801 Does the noise level increase at max Contrast Brightness and Sound controls CIRCUITS TO BE CHECKED Tuner PIF Automatic Gain Control 5V 32V Power Source CIRCUITS TO BE CHECKED Sound system pins 28 and 44 of IC801 Sound Detector Circuit Sound Switch and Att Control Audio Output Circuit Does signal appear at pins 2 and 4 of IC301 Check P302 IC301 and peripheral circuit Check Q321 ...

Page 17: ...hite balance The picture colour is yellow The picture colour is magenta The picture colour is cyan Check Q870 Q885 and its adjacent circuits Check Q871 Q883 and its adjacent circuits Check Q872 Q887 and its adjacent circuits Check IC801 and bias control circuit NO SPECIFIC COLOUR PAL NO COLOUR SYNCHRONIZATION Check IC801 R801 R802 R803 D804 D805 D806 and Q801 Check X1001 12MHz ...

Page 18: ...X0110BM TX0124BM 2SC3207 2PC1815 DX0111CE BASE COLLECTOR EMITTER BASE COLLECTOR EMITTER 16 9 1 8 28 15 1 14 B C E KA7808A 1 2 3 CATHODE ANODE RED STRG5653 STV9302A AN7523 PX0013PE 2SD2586 1 9 ZR BR COLLECTOR COLLECTOR BASE EMITTER BASE EMITTER JC COLLECTOR BASE EMITTER IX3368CE TDA9821 M52797SP 2SC2735 1 32 ...

Page 19: ... 8 Vp p 6 90 4 Vp p 1 1 04 Vp p 3 3 40 Vp p 4 3 12 Vp p 2 3 32 Vp p 8 3 16 Vp p 9 2 44 Vp p 10 122 Vp p 7 88 6 Vp p 11 8 72 Vp p 13 140 Vp p 14 1200kVp p 15 528 Vp p 12 47 2 Vp p 16 27 2 Vp p V 17 2 00 Vp p WAVEFORMS ...

Page 20: ...20 21GT 22 CHASSIS LAYOUT ...

Page 21: ...21 21GT 22 ...

Page 22: ...21GT22 21GT22 22 23 BLOCK DAIAGRAM MAIN UNIT ...

Page 23: ...24 21GT 22 HEADPHONE UNIT MONO BILINGUAL UNIT ...

Page 24: ...TED WITH AC MAINS VOLTAGE WHEN SERVICING THE AREA CONNECT AN ISOLATING TRANS FORMER BETWEEN TV RECEIVER AND AC LINE TO ELIMINATE HAZARD OF ELECTRIC SHOCK NOTES 1 The unit of resistance ohm is omitted K 1000 ohms M Meg ohm 2 All resistors are 1 16 watt unless otherwise noted 3 All capacitors are µF unless therwise noted P µµF VOLTAGE MEASUREMENT CONDITIONS 1 Voltage in parenthesis measured with no ...

Page 25: ...21GT22 21GT22 26 27 MAIN UNIT SCHEMATIC DIAGRAM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J ...

Page 26: ...28 21GT 22 CRT UNIT A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 HEADPHONE UNIT ...

Page 27: ...29 21GT 22 ...

Page 28: ...21GT22 21GT22 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J 30 31 PWB A MAIN UNIT Copper Side PRINTED WIRING BOARD ASSEMBLIES ...

Page 29: ...21GT22 21GT22 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J 32 33 PWB A MAIN UNIT Chip Parts Side ...

Page 30: ...34 21GT 22 A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 Copper Side PWB B CRT UNIT Chip Parts Side ...

Page 31: ...0 C3313 C3313 RJ3310 RJ3310 C3328 C3328 R3310 R3310 C3312 C3312 RJ3315 RJ3315 C3311 C3311 RJ3309 RJ3309 C3315 C3315 C3307 C3307 RJ3314 RJ3314 RJ3312 RJ3312 RJ3303 RJ3303 Q3301 Q3301 R3300 R3300 Q3303 Q3303 R3314 R3314 R3313 R3313 R3315 R3315 RJ3311 RJ3311 R3302 R3302 R3316 R3316 RJ3306 RJ3306 RJ3307 RJ3307 C3305 C3305 R3303 R3303 C3324 C3324 R3308 R3308 Q3300 Q3300 R3304 R3304 R3309 R3309 RJ3304 R...

Page 32: ...2PD601AR 1 J 2PD601AR AB Q1010 VS2PD601AR 1 J 2PD601AR AB DIODES AND LED D201 RH EX0676GEZZ J Zener EX0676GE AA D203 RH DX0045GEZZ J DX0045GE D301 VHD1SS119 1 J 1SS119 AA D302 VHD1SS119 1 J 1SS119 AA D332 RH DX0445CEZZ J DX0445CE AL D503 RH DX0045GEZZ J DX0045GE D505 RH DX0441CEZZ J DX0441CE AC D506 RH EX0630GEZZ J Zener EX0630GE AA D507 RH DX0045GEZZ J DX0045GE D508 RH DX0131CEZZ J DX0131CE AC D5...

Page 33: ...V Mylar AA C652 VCQYTA1HM472J J 4700p 50V Mylar AB C653 VCEA0A1HW105M J 1 50V Electrolytic AB C654 VCKYCY1HF223Z J 0 022 50V Ceramic C655 VCEA0A1HW106M J 10 50V Electrolytic AB C656 VCEA0A1HW474M J 0 47 50V Electrolytic AB C657 VCKYCY1EF104Z J 0 1 25V Ceramic AA C658 VCKYCY1EF104Z J 0 1 25V Ceramic AA å C701 RC FZ031SCEZZ J 0 1 275V AD MetalIized Polypro Film C702 RC KZ0029CEZZ J 0 01 250V Ceramic...

Page 34: ... 1 1W Metal Film AA R508 VRD RA2BE153J J 15k 1 8W Carbon AA R509 VRD RA2BE153J J 15k 1 8W Carbon AA R511 VRS CY1JF181J J 180 1 16W Metal Oxide AA R512 VRD RM2HD5R6J J 5 6 1 2W Carbon R521 VRD RA2BE562J J 5 6k 1 8W Carbon AA R529 VRD RA2BE223J J 22k 1 8W Carbon AA R530 VRS CY1JF334J J 330k 1 16W Metal Oxide AA R531 VRS CY1JF101J J 100 1 16W Metal Oxide AA R532 VRS CY1JF101J J 100 1 16W Metal Oxide ...

Page 35: ...AA R1019 VRS CY1JF392J J 3 9k 1 16W Metal Oxide AA R1020 VRS CY1JF101J J 100 1 16W Metal Oxide AA R1021 VRS CY1JF153J J 15k 1 16W Metal Oxide AA R1022 VRS CY1JF101J J 100 1 16W Metal Oxide AA R1023 VRS CY1JF101J J 100 1 16W Metal Oxide AA R1024 VRS CY1JF122J J 1 2k 1 16W Metal Oxide AA R1025 VRS CY1JF101J J 100 1 16W Metal Oxide AA R1026 VRS CY1JF224J J 220k 1 16W Metal Oxide AD R1028 VRS CY1JF101...

Page 36: ...3315 VCKYCY1HF103Z J 0 01 50V Ceramic AA C3316 VCEA0A1CW107M J 100 16V Electrolytic AC C3317 VCEA0A1CW106M J 10 16V Electrolytic AB C3318 VCEA0A1CW106M J 10 16V Electrolytic AB C3319 VCEA0A1CW106M J 10 16V Electrolytic AB C3320 VCKYCY1HB102K J 1000p 50V Ceramic AA C3321 VCKYCY1HB102K J 1000p 50V Ceramic AA C3322 VCEA0A1CW106M J 10 16V Electrolytic AB C3323 VCKYCY1HB102K J 1000p 50V Ceramic AA C332...

Page 37: ... y 1 1 Not Avairable Front Cabinet 1 2 HBDGB0001KJSC J SHARP Badge AE 1 3 GCOVAA184WJSA J RC LED Cover 1 4 JBTN A062WJSA Control Button 1 5 JBTN A063WJSA J Power Button 1 6 MSPRC0005PEFW J Power Button Spring AB 2 CCABB0064WEA0 J Rear Cabinet Ass y 2 1 Not Avairable Rear Cabinet CABINET PARTS LOCATION 1 2 1 3 1 5 1 6 1 4 ...

Page 38: ...Ref No Part No Description Code Ref No Part No Description Code 42 21GT22 PACKING OF THE SET ...

Page 39: ...Ref No Part No Description Code Ref No Part No Description Code 43 21GT22 M E M O ...

Page 40: ...a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without prior written permission of the publisher SHARP CORPORATION AV Systems Group Quality Reliability Control Center Yaita Tochigi 329 2193 Japan TQ1457 S Dec 2002 Printed in Japan In Japan gedruckt MY DS Design and Production Information Design SEM Production STTM ...

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