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SERVICE MANUAL

COLOUR TALEVISION

Chassis No. GA-4

MODEL

In the interests of user-safety (Required by safety regulaton in some countries) the set should be restored to its original condition
and only part identical to those specified should be used.

PAL B/G System
Full Auto Channel Preset and Auto Channel Skip
100-CH Program Memory
CATV (Hyper Band) Ready
<Used Frequency Synthesizer Tuner>
Black Stretch Circuit
On Timer / Off Timer / Reminder Timer
Blue Back Noise Mute
Front AV IN & Rear AV IN / OUT Terminals
Front Headphone Jack
Aperture Control Circuit

FEATURE

Auto Fine Tuning
Colour Comp Filter (NTSC Only)
High Contrast Picture
Hotel Mode
2 Language OSD
(English / Thai )
White Temperature Select
Component In
Surround Sound Effect
<With Bass / Treble / Balance>
AV Stereo

SPECIFICATIONS...................................................
IMPORTANT SERVICE NOTES..............................
ADJUSTMENT PRECAUTIONS..............................
TROUBLE SHOOTING FLOWCHART....................
SOLID STATE DEVICE BASE DIAGRAM...............
WAVEFROMS.........................................................
CHASSIS LAYOUT..................................................
BLOCK DIAGRAMS
MAIN UNIT.......................................................
CRT UNIT.........................................................
HEADPHONE UNIT.........................................
S-CONTROL UNIT...........................................
DESCRIPTION OF SCHEMATIC DIAGRAM.........

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SCHEMATIC DIAGRAM
MAIN UNIT............................................
CRT UNIT..............................................
HEADPHONE UNIT...............................
S-CONTROL UNIT................................
PRITED WIRING BOAD ASSEMBLIES.......
REPLACEMENT PARTS LIST
ELECTRICAL PARTS............................
MISCELLANEOUS PARTS...................
ACCESSORIES PARTS.......................
CABINET PARTS..................................
PACKING PARTS..................................

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CONTENTS

WARNING

The chassis in this receive is partially hot. Use an isolation transformer between the line cord plug and
power receptable, when servicing this chissis. To prevent eletriv shock, do not remove cover. No user-
servieable parts inside. Refer servicing to qualified service personnel.

SHARP MENUFACTURING (THAILAND) CO.,LTD.

21F-PA330

I

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Содержание 21F-PA330I

Страница 1: ...tereo SPECIFICATIONS IMPORTANT SERVICE NOTES ADJUSTMENT PRECAUTIONS TROUBLE SHOOTING FLOWCHART SOLID STATE DEVICE BASE DIAGRAM WAVEFROMS CHASSIS LAYOUT BLOCK DIAGRAMS MAIN UNIT CRT UNIT HEADPHONE UNIT S CONTROL UNIT DESCRIPTION OF SCHEMATIC DIAGRAM g g g g g g g g g g g g g g g g g g g n n n g g g g Page 2 2 3 13 15 16 17 18 19 19 20 21 SCHEMATIC DIAGRAM MAIN UNIT CRT UNIT HEADPHONE UNIT S CONTROL...

Страница 2: ...rrier Frequency 6 5 MHz 32 4 MHz 6 0 MHz 32 9 MHz 5 5 MHz 33 4 MHz 4 5 MHz 34 4 MHz Colour Sub Carrier Frequency 34 47 MHz Power Input 110 240V AC 50 60 Hz Power Consumption 97 W Audio Power Output Rating 4 W RMS x 2 Speaker Size 12 x 6 cm 2 pcs Voice Coil Impedance 16 ohm at 400 Hz Aerial Input Impedance VHF UHF 75 ohms Unbalanced Receiving System PAL B G Tuner Ranges VHF Channels E2 thru E12 UHF...

Страница 3: ...ng SERVICE mode MANUAL Short JA301 JA410 then TV set will switch to the service mode position and the microprocessor is in input mode Adjustment through the I2C bus control Press the MENU key on the remote controller to get ready to select the mode Adjustment mode Setting mode Check mode and Option mode one by one Press the CH UP DOWN key on the remote controller select the item in Adjustment mode...

Страница 4: ...R V14 SCM BB V15 SUB VOL V16 S TRAP BG V20 S TRAP I V21 S TRAP DK V22 S TRAP M V23 S TRAP 574 V24 R C UP YUV IN SERVICE MODE V25 G C UP YUV IN SERVICE MODE V25 B C UP YUV IN SERVICE MODE V25 R C DOWN YUV IN SERVICE MODE V25 G C DOWN YUV IN SERVICE MODE V25 B C DOWN YUV IN SERVICE MODE V25 R D UP YUV IN SERVICE MODE V25 B D UP YUV IN SERVICE MODE V25 B D DOWN YUV IN SERVICE MODE V25 R D DOWN YUV IN...

Страница 5: ...05 05 03 03 06 06 EEPROM ITEMS R DRIVE B DRIVE R CUT G CUT B CUT RF AGC VIF VCO H VCO SUB CONTRAST SUB COLOR SUB BRIGHT SUB TINT SUB SHARPNESS SUB COLOR YUV SUB TINT YUV V SIZE 50Hz V SHIFT 50 Hz H SHIFT 50 Hz SECAM BR SECAM BB SUB VOL V SIZE 60 Hz V SHIFT 60 Hz H SHIFT 60 Hz S TRAP BG S TRAP I S TRAP DK S TRAP M S TRAP 5 74 CUTOFF BKGD YUV R DRI YUV B DRI YUV R CUT YUV G CUT YUV B CUT YUV SUB CON...

Страница 6: ...1 VERT SYNC DETECT MIN WIDTH MSB LSB RESPECTIVELY AS TV AV YUV SWICH CHCHANGE FBP FLYBACK PULSE SLICE LEVEL TV VD2 VD1 VERT SYNC DETECT MIN WIDTH MSB LSB RESPECTIVELY AS TV AV YUV SWICH CHCHANGE FBP FLYBACK PULSE SLICE LEVEL AV OSD F01 F02 F03 F04 F05 F06 F07 F08 F09 F10 F11 F12 F13 F14 F15 F16 F17 F18 F19 F20 F21 F22 F23 F24 F25 F26 F27 F28 F29 F30 F31 F32 F33 F34 F35 F36 F37 F38 F39 F40 F41 F42 ...

Страница 7: ...7 O08 O09 O10 O11 O12 O13 O14 O15 O16 O17 O18 O19 O20 O21 O22 O23 O24 O25 O26 O27 O28 O29 O30 DATA LENGTH 0 1 0 99 0 60 0 1 0 1 0 1 0 1 0 1 1 15 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 255 1 5 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 INITIAL DATA 0 1 1 1 1 0 15 1 1 1 1 0 0 0 0 63 3 0 0 0 0 0 1 0 0 0 0 0 SET UP DEC 0 1 0 0 0 0 1 1 1 1 1 0 0 0 1 65 3 0 0 0 0 0 0 0 0 0 0 1 OPTION MODE FOURTH STAGE EEPROM IT...

Страница 8: ...s repeat step2 Preceed step 4 5 in manual mode PURITY ADJUSTMENT No 1 Adjusting point PURITY ADJ Receive the GREEN ONLY signal Adjust the beam current to 700 µA Degauss the CRT enough with the degauss coil Note Follow the Job Instruction Sheet to adjust the magnetic field Vertical Bv 0 030 mT 0 30 gauss Horizontal Bh 0 20 mT 0 20 gauss Maintain the purity magnet at the zero magnetic field and keep...

Страница 9: ...NTROL AUTO MANUAL ADJ Adjusting procedure conditions MANUAL ADJ In No signal RASTER condition Go to service mode choose service data V03 Connect oscilloscope to IC801 pin11 adj V03 until freq become 15 625 0 15 KHz AUTO ADJ In No signal RASTER condition Go to service mode Choose service data V03 by pressing R C Auto Hex C1 key OSD will appear OK at screen If appear NG pls repeat step 3 MANUAL ADJ ...

Страница 10: ...UP G CUTOFF G C DOWN B CUTOFF B C UP B CUTOFF B C DOWN R DRIVE R D UP R DRIVE R D DOWN B DRIVE B D UP B DRIVE B D DOWN RC key 1 HEX 80 RC key 4 HEX 20 RC key 2 HEX 40 RC key 5 HEX A0 RC key 3 HEX C0 RC key 6 HEX 60 RC key 7 HEX E0 RC key Flashback HEX E4 RC key 8 HEX 10 RC key 0 HEX 50 Dark White White 9 5 IRE 50 IRE 5 5 IRE Note Dark White WINDOW PATTERN SIGNAL In Window Pattern Signal condition ...

Страница 11: ...of PAL Colour Bar be at the same level shown as Fig 1 1 Clear the Service mode Adjusting point SUB COLOUR I2C BUS CONTROL to be done after sub picture sub tint adj Wavefrom and others Adjusting procedure conditions 1 2 3 4 5 Fig 1 1 No 1 Cy G B W Y 100 W Mg R 75 No 1 2 3 PROTECTOR OPERATION CHECKING Receive Monoscope Pattern signal Set CONTRAST MAX Set BRIGHT MAX During the Collector Emitter of Q8...

Страница 12: ...e UP DOWN key to check whether the left to right BALANCE effect is OK or not Wavefrom and others In NORMAL Mode when press NORMAL key will appear NORMAL OSD and all setting PICTURE SOUND functions set to NORMAL No 14 15 16 No 1 Adjusting point SOUND SYSTEM NOISE MUTE CHECKING OSD LANGUAGE QUANTITY CHECK Adjusting point HEADPHONE OUTPUT CHECKING Receive PAL B G signal press MENU choose CH SETTING t...

Страница 13: ...pply voltage LB must approx 5V BT must be approx 33V And check the CH preset data Check the tuner AGC at TP201 Does noise or signal appear at pin 58 of IC801 Check IC801 and related circuit Check IC401 and related circuit Check pin 1 of SF201 Tuner and related circuit Check pin 60 at IC801 and related circuit Check pin 59 of IC801 Tuner and related circuit Check pin 58 of IC801 Does the noise leve...

Страница 14: ...TY Re adjust vertical size Bus Data Check R503 R506 R513 R520 and C515 NO VERTICAL SCAN Check IC501 Check C511 Check IC501 bias NO SPECIFIC COLOUR Is some colour produced in B W broadcast reception Is the white balance properly adjusted Re adjust the white balance The picture colour is yellow The picture colour is magenta The picture colour is cyan Check Q855 and its adjacent circuits Check Q854 a...

Страница 15: ... 56 55 54 53 52 51 50 49 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 16 33 48 49 17 32 M61266F 1 2 4 3 P C 1 2 3 S 4 FXA003WJ COLLECTOR BASE EMITTER C3928 COLLECTOR BASE EMITTER A1530 4 6 3 1 IMZ1A CATHOD ANODE RED PX0013 1 7 AN15525 _ DX0476CE 1 2 1 2 E C B 2SC3198 E C B 2SD468 C 2SC2235 GND COLLECTOR Vout SE125N AN17820B E C B TT2140 LOTNo TT2140 1 2 3 PQ09RDA 1 4 DX0452CE CATHOD ANODE STRW6...

Страница 16: ...z Rate 6 6 24 Vp p Horiz Rate 7 1 80 Vp p Vert Rate 8 1 76 Vp p Vert Rate 9 5 63 Vp p Horiz Rate 10 51 6 Vp p Horiz Rate 11 1040 Vp p Horiz Rate 12 53 6 Vp p Vert Rate 13 4 8 Vp p Vert Rate 14 126 Vp p Horiz Rate 15 508 Vp p 16 5 28 Vp p Horiz Rate 17 5 36 Vp p Vert Rate 18 88 8 Vp p Horiz Rate 19 96 8 Vp p Horiz Rate 20 99 2 Vp p Horiz Rate ...

Страница 17: ...CHASSIS LAYOUT 17 A C B D E F G H 1 2 3 4 5 6 7 8 9 10 ...

Страница 18: ...BLOCK DIAGRAM PWB A MAIN UNIT 18 ...

Страница 19: ...19 PWB B CRT UNIT A C B D 1 2 3 4 5 6 7 8 9 10 A C B D 1 2 3 4 5 6 7 8 9 10 PWB C HEADPHONE UNIT ...

Страница 20: ...20 PWB E SOUND CONTROL UNIT A C B D E F G H 1 2 3 4 5 6 7 8 9 10 ...

Страница 21: ...sistance ohm is omitted K 1000 ohm M Mage ohm 2 All resistors are 1 16 watts unless otherwise noted 3 All capacitor are µF unless otherwise noted P µµF VOLTAGE MEASUREMENT CONDITIONS 1 Voltages in parenthesis measured with no signal 2 Voltage without parenthesis measured with 3mV B W or colour signal 3 All the voltages in each point are measured with VTVM WAVE FORM MEASUREMENT CONDITIONS 1 The col...

Страница 22: ...PWB A MAIN UNIT SCHEMATIC DIAGRAM 22 ...

Страница 23: ...PWB B CRT UNIT 23 PWB C HEADPHONE UNIT A C B D 1 2 3 4 5 6 7 8 9 A C B D 1 2 3 4 5 6 7 8 9 ...

Страница 24: ...24 PWB E SOUND CONTROL UNIT A C B D E F G H 1 2 3 4 5 6 7 8 9 10 ...

Страница 25: ...PWB A MAIN UNIT COMPONENT SIDE PRINTED WIRING BOARD ASSEMBLIES 25 ...

Страница 26: ...R 8 4 2 R 8 4 2 R 1 0 6 4 R 1 0 6 4 R 1 0 6 5 R 1 0 6 5 C 1 0 0 8 C 1 0 0 8 C 8 2 6 C 8 2 6 C 1 0 0 9 C 1 0 0 9 C 8 1 3 C 8 1 3 R 1 0 6 1 R 1 0 6 1 R 1 0 5 5 R 1 0 5 5 C 7 5 7 C 7 5 7 D 1 0 8 6 D 1 0 8 6 R J 2 5 R J 2 5 R 1 8 5 5 R 1 8 5 5 C 1 8 5 6 C 1 8 5 6 R 1 8 5 4 R 1 8 5 4 R 8 4 5 R 8 4 5 C 8 3 2 C 8 3 2 C 8 2 8 C 8 2 8 C 8 3 0 C 8 3 0 R 8 4 4 R 8 4 4 C 8 3 1 C 8 3 1 C 8 3 3 C 8 3 3 C 8 2 1 ...

Страница 27: ...PWB B CRT UNIT 27 PWB C HEADPHONE UNIT A C B D 1 2 3 4 5 6 7 8 9 10 COMPONENT SIDE CHIP PART SIDE A C B D 1 2 3 4 5 6 7 8 9 10 COMPONENT SIDE ...

Страница 28: ...28 PWB E SOUND CONTROL UNIT A C B D 1 2 3 4 5 6 7 8 9 10 COMPONENT SIDE CHIP PART SIDE ...

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