Sharp CX-34G3 Service Manual Download Page 3

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ADJUSTMENT PRECAUTIONS

SERVICE MODE

This model’s settings are adjusted in two different ways: through the

bus control and in the conventional analog

manner. The adjustment via the

bus control includes preset-only items and variable data.

1. Calling the service mode by the microprocessor

Set the switch

to the service mode position, and the microprocessor is put in the service mode

(adjustment through the

bus control).

Press the

UP/DOWN keys on the remote controller to select the modes one by one.

Press the

UP/DOWN keys on the remote controller to select the modes in the order opposite to the

above step

Using the VOLUME UP/DOWN keys on the remote controller, the data can be modified.
Set the switch

to the normal mode (OFF) position, and the microprocessor is put out of the

service mode.

2. Factory

Set the switch

to the service mode position and turn on the main power switch. Initial values are

automatically preset only when a new

is used (judgment with the first 4 bytes).

The initial data are preset as listed on pages 4 and 5.
Keep in mind that some settings should be modified, and the others should remain as preset.

Once the chassis has been put together, be sure to set the switch

to the service mode position

first and then turn on the main power switch (see the step

above). Turning on the power without

initializing the

may cause a flow of excess beam current.

3. The accompanying memory map

document for the

is for your

reference.

3-1

(1) Press the specific keys to change the modes as follows.

COLOUR ADJUST mode

60 Hz ADJUST mode

In the direction of arrow :

DOWN key

In the opposite direction :

UP key

m o d e

R-CUT OFF
G-CUT OFF
B-CUT OFF

HORIZONTAL mode

time out

KEY

R-CUT OFF
G-CUT OFF
B-CUT OFF
R-DRIVE
B-DRIVE

HORIZONTAL mode

DOWN

KEY

7 K E Y

KEY

9 K E Y

COLOUR ADJUST mode

V-AMP 50 Hz

V-LINE 50 Hz

S-CORRECT 50 Hz (V

V-PHASE 50 Hz

H-PHASE 50 Hz

START

STOP

R-Y (R-Y)

B-Y (R-Y)

In the direction of arrow :

DOWN key

In the direction of arrow :

DOWN key

In the opposite direction :

UP key

In the opposite direction :

UP key

The characters in parentheses appear on the on-screen display.

3-2

Summary of Contents for CX-34G3

Page 1: ...l n Wide Range Chopper Regulator System n NTSC Colour Comb Filter n Front A V Input Rear A V Input Output Terminal n Black Strech Circuit CONTENTS Y Page Page l SPECIFICATIONS 2 l WAVE FORMS 22 l IMPORTANT SERVICE NOTES 2 DESCRIPTION OF SCHEMATIC DIAGRAM 24 l ADJUSTMENT PRECAUTIONS 3 BLOCK DIAGRAM 29 l TROUBLE SHOOTING TABLE 17 PRINTED WIRING BOARD ASSEMBLIES 33 l SOLID STATE DEVICE BASE DIAGRAM 1...

Page 2: ...lift picture tube by the neck 4 Handle the picture tube only when wearing shatterproof goggles and after discharging the high voltage completely X RAY This receiver is designed so that any X Ray radiation is kept to an absolute minimum Since certain malfunctions or servicing may produce potentially hazardous radiation with prolonged exposure at close range the following precautions should be obser...

Page 3: ...that some settings should be modified and the others should remain as preset Once the chassis has been put together be sure to set the switch S1006 to the service mode position first and then turn on the main power switch see the step 2 above Turning on the power without initializing the E PROM may cause a flow of excess beam current c4 3 3 The accompanying memory map 12 page document for the RH i...

Page 4: ...E2PROM s addresses OOH thru 03H are read If the data are not as given below the E2PROM is initialized according to the table below Address Data OOH 22H 02H 13H I OOH OlH 29H 03H 48H E PROM item IData adjustable range Data initial value 1 Remarks I I 3c L l I OlH W f 4 03H R CUT OFF G CUT OFF B CUT OFF G DRIVE B DRIVE 50Hz V AMP 50Hz V LINEARITY 50Hz S CORRECTION 50Hz V PHASE 50Hz H PHASE V BLK ST ...

Page 5: ...NITIAL SETTINGS OF CHANNEL SELECTION DATA 1 Make an entry of MCLI in the service mode in order to set the following channel selection data to the E2PROM And select the POSl channel An MCL2 3 or 4 input makes different settings FACTORY SETTING 1 The following key in data have been factory set for the E2PROM LAST FB POS 1 VOLUME MIN CONTRAST MAX COLOUR CENT BRIGHTNESS CENT TINT CENT SHARPNESS CENT I...

Page 6: ...the third decimal place 4 Relieve pin 4 of lC201 of the DC voltage 5 Reconnect the antenna in position and receive l Position the T203 core in the the E 12CH signal With the AFT off adjust the range in which the E l 2CH sig receiving frequency to 224 25 MHz nal can be received 6 Connect the DC digital voltmeter to pin 20 of IC201 Adjust T203 so that the voltmeter should read the same voltage as in...

Page 7: ... only Blue only Red only screen screen screen T Single colour Fig 5 3 screen cleared Rank A on the left of the CRT l Whether in the service mode OI not hold down the single coloul key for 1 second or longer ant the service mode is called The TEXT key or the R G Cy kel may be used instead to provide the single colour screens o j Adiustina j Adiuztino oracedurelconditions I Waveform and others 1 Rec...

Page 8: ...ontroller to call II 1 2 3 4 5 the NORMAL mode Note Before starting this adjustment warm up the unit for 30 minutes or longer at a beam current of over 500 PA 14 700 PA 21 5 Adjust the G drive and B drive data to have a Note colour temperature of 12 300 K white G DRIVE UP 7 KEY 6 Adjust the contrast and brightness controls to DOWN I KEY have the beam current of 200 PA Now check the B DRIVE UP 8 KE...

Page 9: ...Waveform and others 1 Sub colour 1 Receive the E l 2CH PAL colour bar signal adjustment 2 Using the remote controller call the Video Nor 12C bus mal mode B adjustment 3 Connect the oscilloscope to TP851 14 1TP852 21 RED cathode Use a 10 1 probe l Range 2 Vldiv l Sweep time 20 usecldiv 4 Using the remote controller call the sub colour w adjustment mode Adjust the sub colour data so W Y lOO WMg R th...

Page 10: ...ximum 4 Make a short circuit between the collector and emitter of Q851 Q852 or Cl853 and make sure that the protector is activated and the stand by mode is called 2 High voltage protector 1 Receive the E8CH monoscope pattern signal 2 Connect the bias box to the cathode R635 side of D607 3 Adjust the bias box voltage to 18 V and make sure that the protector is not activated 4 Adjust the bias box vo...

Page 11: ...UP DOWN key 7 Channel sign 1 The display colour of all the channel O 99 signs display coiour must be green Keep the AFT on 11 1 o Adjusting point Adjusting procedure conditions Waveform and others 9 COLOUR 1 Receive the E l 2CH PAL colour bar signal Us SYSTEM key ing the COLOUR SYSTEM key select a mode other than PAL and make sure the colour system does not work properly 2 Receive the E 37CH NTSC ...

Page 12: ...H2 012 1 013 I PLL d a t a i PLL data lower t OIA 1I 1 fl1B 1 017 018 019 I I PLL data lower PLL PLL data iI data upper ower PLL data upper PLL data il eri 1 I I I CHIO CHll I I I OlC OlD OlE 1 OlF 1I I 020 I PLL data uppe PLL data lower PLL data I Jeer PLL data lowerj PLL data De CH12 CH13 CH14 021 022 023 024 1 025 1 PLL data ildwerj PLL data upper PLL data lower PLL data upper CH15 CH16 026 1 0...

Page 13: ...per PLL d I 1 CH72 CH73 I CH74 lzF 09B 09c 09D 09E 09F OAO OAl OA2 OA3 OA4 OA5 OA6 OA7 OA8 OA9 OAA OAD 1 OAE I PLL d PLL d PLL d PLL dlata lower PLL dlata upper PLL dlata lower PLL clata upper PLL clata lower PLL clata upper PLL ctata lower PLL c TT late Imnerb PLL data lower PLL data upper pLL dP ln Amr PLL PLL PLL L TT PLL data lower PLL data upper PLL data lower PLL data upper I CH77 I CH78 I 1...

Page 14: ...F r iF iF T E E OC6 1 oc7 I oca oc9 OCA OCB PLL data upper PCL data lower1 I PLL data upper PLL data lower PLL data upper PLL data lower I 1 CH97 I CH98 CH99 OCC POWER I L OCD TVIAV I I I OCE BLUE BACKGROUND 1 One digit two digit 1 OFFI LANGUAGE I 1 Factorv set at ON 1 OCF II I 1 AST POSITION I I 000 LAST CONTRkT ODl LAST COLOUR OD2 LAST BRIGHTNESS OD3 LAST TINT I I OFE 1 I I I I I t I I I OFF 1 I...

Page 15: ...6 5 4 3 2 1 0 REMARKS CRITERIA SETTING 130 AUDIO SYSTEM VIDEO SYSTEM CH4B 131 AUDIO SYSTEM VIDEO SYSTEM CH49 132 AUDIO SYSTEM VIDEO SYSTEM CH50 133 AUDIO SYSTEM VIDEO SYSTEM CH51 I I 1 15F 1 AUDIO SYSTEM 1 VIDEOSYSTEM 1 iHi I 1 I I ...

Page 16: ...V MODE 165 166 167 168 169 16 1 SUB DATA I I I I 1 S FIELD pc0 1 r IDEUFJ Foj s GP I I 198 I 1 V ID SW 1 s KIL I I I 19c I I I I I I BELLFO 1 I I I 1 I 196 L 19E 1 I 1AB I I I I I I I I I I I I I I I i I I I 1AC 1AD 1AE IAF I I 1BO I I I I I I I I I I I I I I I I I I 181 I I I I I I I I I I I I I I I The initial setting of the RH iX2938CEZZ Nl must be changed from 00 to 01 With the RH iX2938CEN2 t...

Page 17: ... power is turned off The power key is still effective IC1003 Fig 1 EEPROM ST24C02 1 IC801 V C J TB1226CN TU201 PLL CXA3134 6 uu 2s 0 5s 17 1 CIRCUITS TO BE CHECKED l Tuner NO PICTURE NO SOUN l PIF l Automatic Gain Control l W 9V Power Source Does the noise level increase at max received No snow noise I Jr Check the tuner supply voltage MB must be approx 9V BP must approx 5V BT must be approx 31V a...

Page 18: ...OUBLE SHOOTING TABLE Continued NO SPECIFIC COiOU NO Is some colour produced in YES BNJ broadcast reception I _ __ i Check IC801 R809 R810 i R811 D801 D802 D803 1 I Q801 Q802 Q803 Q804 and Q805 I yEs I s t h e w h i t e b a l a n c e p r o p e r l y adjusted NO r m _ I I I Readjust the white balance I I I The prcture colour IS magenta r v w r __ r _ ____ I Check Q851 and its I Check Q852 and its I ...

Page 19: ...TB1226 1 11 BA7357S SIDE VIEW ILt BASE COLLECTOR Ii Ii R 1LI BASE COLLECTOR EMllTER L L CATHODE ANODE 1 2 3 3 2 1 EMITTER 2SA1015 2SC1815 2SC1906 KiA7045P TA78L09 UPC78LO5 iX0037CE TA7348P 2sc2229 2SC2482 B C E B C E 2SD1884 PX0003PE 1 7 1 9 1 2 3 iX0640CE TDA7056A 2582586 2SD1877 KA7809 KA7805 19 ...

Page 20: ...Ol CFlOOl ICI003 if PBO4 ICI002 8 OQBOI Q607 PBOS 0 OQB03 0 4802 I C60 2 1 C60 4 4 0 5 0 Q606 1C603 0 9601 0 T601 CB14 CB13i n 0 X801 e6 TPBOl F Q602 0 0 R F ACC 9401 4 4 0 4 63 L602 ooa303 0 cl305 T602 VA P302 n IC401 I c202 t J BC D604 5 4 0 1 qFzq I I Hl S1006 NOR SEVON TU20 1 L TUNER IDEOj A U D I O VIDEO IN 10 AUD IN AUD OUT TPB54 VI DE0 OUT 10 r 2 I i 1 I 2 I 3 4 I 5 I 6 I 2 0 ...

Page 21: ...1006 NOR SEVON J403 5 4 0 2 I 0 a301 5 1 0 0 4 CH DOWN 5 1 0 0 5 Y l CH UP s1003 VOL UP PRE SET 4804 IC1002 a I7 q D1013 RMClOOl CFlOOl g OQBOl cl805 ow303 0 QEO2 I 1 VIDEO IN VIDEO OUT AUDIO I IN 2 13 I 1 CRT UNIT 1 PWB B 1 1 I 2 I 3 I 4 I 5 I 6 1 21 ...

Page 22: ... H IO 2 1 3 Vp p H IO 3 1 5 Vp p H l o 4 3 0 Vp p H IO 5 3 0 VP p H 1 A I 1 L L n 7Ttt w II7 I I t I 0 1 8 Vp p H 0 8 VP p I i I I 140 VP p H CX 34G3 145 Vp p H CX 51 G3 0 9 VP p I i CX 34G3 1000 Vp p H CX 51 G3 150 Vp p H IO 19 520 Vp p H 2 2 ...

Page 23: ... NOTE The parts here shown are supplied as an assembly but not independently n Infrared Remote Control Unit RRMCGI 342PESA NOTE The parts here shown are supplied as an assembly but not independently 03001 2SC3203Y DxDl 191 L 1 2 3 4 5 6 I 23 ...

Page 24: ...WITH AC MAINS VOLTAGE WHEN SERVlClNG THEAREA CONNECTAN ISOLATING TRANS FORMER BETWEEN TV RECEIVER AND AC LlNE TO ELIMINATE 1 HAZARD OF ELECTRIC SHOCK NOTES 7 The unit of resistance ohm is omitted K 1000 ohms M Meg ohm 2 All resisfors are I B watt unless otherwise noted 3 All capacitors are pF unless therwise noted P ppF VOLTAGE MEASUREMENT CONDITIONS 1 Voltage in parenthesis measured with no Signa...

Page 25: ...MODELCX 34G3 SCHEMATIC DIAGRAM PWB C AV2 UMT DUNTK9324WEVO B CRT UNIT 9323WEV2 PWB A 7 MAIN UNIT DUtdTK9322WEW 1 Ic80 1 T91226CN iPAL SECAM NTSCI IC603 N S Th78109S 25 ...

Page 26: ...k CX 34G3 CX 51 G3 2 6 ...

Page 27: ...CX 34G3 CX 51 G3 MODEL CX 51 G3 SCHEMATIC DIAGRAM 27 ...

Page 28: ...CX 34G3 CX 34G3 CX 51 G3 CX 51 G3 28 ...

Page 29: ...J 1 2 I 3 AUDIO IN w z VIDEO IN 4 ____AUDIO OUT ______VIDEO OUTv 5 6 29 ...

Page 30: ... I CX 34G3 CX 34G3 CX 51 G3 CX 51 G3 r H DRIVE 060 I H OUT T60 I 0602 T PLUSE CLIP D602 l 5701 c 1 I d 1 L 8 I I I F __A I j L70L 1 LINE FILTER 1 I a 1 II II I l 4 RECTIFIER 070 I 0704 ...

Page 31: ... H G F E D C B 4 FOCUS C _ I I I c IC35 I SPOT MODEL CX 51 G3 BLOCK DIAGRAM P B B PWB A MAIN UNIT i a ___ ____ 1 AUDIO IN 2 VIDEO I AUDIO OUT VIDEO C 3 4 I 5 I 6 31 ...

Page 32: ...01004 L A 2 j y 7 L702 LINE FILTER 1 I I I L70 I I 1 I LINE FILTER I 11 18 I I I I I I I I RECTIFIER D70 I 0704 t A i i PLUSE CLIP D602 II Ii e m rh _ __ _ ___ _ ___ JDIO IN VIDEO IN AUDIO OUT VIDEO OUT AUDIO IN VIDEO IN 6 7 I 8 9 I 10 11 12 32 ...

Page 33: ...CX 34G3 C CX 51 G3 C PRINTED WIRING BOARD ASSEMBLIES All the PWBs here are shown as viewed from their wiring sides PWB A Main Unit 1 1 2 3 4 5 6 33 ...

Page 34: ... I 3463 51G3 _ _ xxIIIIIII rX ___ _I 1 XI _ PWB B CRT Socket Unit PWB C AV 2 Terminal Unit 7 8 9 10 11 12 34 ...

Page 35: ...t No Description Code PWB A DUNTK9322WEwl ws MAIN UNIT NOTE a TU201 IC201 IC202 IC302 lC351 IC401 IC501 IC602 iC603 iC604 IC751 IC801 Ic1001 IC1002 IC1003 IC1004 Q201 Q202 Q205 Q207 Q301 Q302 Q303 Q305 Q401 TUNER THE PARTS HERE SHOWN ARE SUPPLiED AS AN ASSEMBLY BUT NOT INDEPENDENTLY VTUVTSTGHD64I R VHFTuner INTEGRATED CIRCUITS VHiBA7357S 1 RH iX0037CEZZ VHiTA7348P 1 VHiTDA7056A 1 VHiTA7348P 1 RH i...

Page 36: ...AB AB AB AB AA AA AA AE Ref No Part No Description Code PACKAGED CIRCUITS PR701 RMPTP0028CEZZ R Packaged Circuit CX 34G3 AG PR701 RMPTPOOOl PEZZ R Packaged Circuit CX 51 G3 AN X801 RCRSB0244CEZZ R Crystal 16 2MHz AH COILS AND TRANSFORMERS CF201 RFiLA0042CEZZ R Filter AD CFl 001 RFiLA0084CEZZ R Filter AE L201 VP DF270KOOOO R Peaking 27pH AB L202 VP DF270KOOOO R Peaking 27pH AB L203 VP DF270KOOOO R ...

Page 37: ...lytic AB Ceramic AA Electrolytic AC Ceramic AA Electrolytic AB Electrolytic AC Ceramic AA Electrolytic AB Electrolytic AA Electrolytic AC Mylar AB Ceramic AA Electrolytic AA Ceramic AA Electrolytic AA Ceramic AA Electrolytic AA Electrolytic AD C408 c409 c410 c411 C412 c413 c414 c415 C416 c417 C418 c419 c501 c501 C502 c503 c504 c505 C506 c507 c509 c510 c511 C512 C512 c513 c513 c514 c515 C518 c519 C...

Page 38: ...C AQ AC AD AA AB AC AC AA AB AC AC AB AD AA AC AC AB AA AC AE AD AA AC AC AE AB AC AC AE AA AB AA AA Ref No Part No Description Code C804 RC QZA103TAYK R 0 01 50V Mylar C805 VCEAGAl CW107M R 1 0 0 16V Electrolytic C806 VCKYMNl CY103N R 0 0 1 16V Ceramic C807 VCEAGAl CWl07M R 1 0 0 16V Electrolytic C808 VCKYMNlCY103N R 0 0 1 16V Ceramic C809 VCKYMNlCY103N R 0 0 1 16V Ceramic C810 VCCCMNlHH120J R 12...

Page 39: ... 1 2k 1 8W C a r b o n R 100 1 8W Carbon R lk 1 8W Carbon R 2 2k 1 8W C a r b o n R lk 1 8W Carbon R 27k 1 8W C a r b o n R 150k 1 8W C a r b o n R 180k 1 8W C a r b o n R 22k 1 8W C a r b o n R 4 7k 1 8W C a r b o n R 4 7k 1 8W C a r b o n R 4 7k 1 8W C a r b o n R 4 7k 1 8W C a r b o n R 12 1 4W Carbon R 12 1 4W Carbon R 10k 1 8W C a r b o n R 1 Ok 1 8W Carbon R 15k 1 8W C a r b o n R 47k 1 8W C...

Page 40: ...7 1 2W C a r b o n R 1 Ok 1 8W Carbon R 4 7 1 2W Carbon R 680 1 8W Carbon R621 VRN VV3ABl ROJ AA AB AA AA AB AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA R709 R710 R711 R712 R715 VRS KT3LB562J VRD RA2BE392J See Controls VRD RA2BE821 J VRD RA2BElO3J Metal Oxide Carbon R621 VRN RV3ABR56J R 820 1 8W Carbon R 10k 1 8W C a r b o n CX 34G3 R 15k 1 8W C a r b o n CX 51 G3 R 18 ll8W Carb...

Page 41: ...34G3 R 18 ll2W Carbon CX 51 G3 AA AA AA AA AA AA AA AA AA AB AA AA AA AA AA AA AA AB AA AB AA AA AA AA AA AA AA AB AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA R1047 VRD MN2BE472J R 4 7k ll8W C a r b o n R1049 VRD MN2BE473J R 47k lf8W C a r b o n R1050 VRD RA2BE473J R 47k 1 8W C a r b o n R1051 VRD MN2BE393J R 39k lf8W C a r b o n R1052 VRD MN2BE272J R 2 7k ll8W C a r b o n Rio55 VRD RM2HDlO...

Page 42: ...852 C853 C853 C854 C854 C861 C865 C866 C870 R851 R851 R852 R856 R856 R858 R859 R860 R862 CAPACITORS VCCSPAl HL271 J R 270 50V C e r a m i c CX 34G3 VCCSPAl HL391 J R 390p 50V C e r a m i c CX 51 G3 VCCSPAl HL271 J R 270 50V C e r a m i c CX 34G3 VCCSPAl HL391 J R 390p 50V C e r a m i c CX 51 G3 VCCSPAl HL271 J R 270 50V C e r a m i c CX 34G3 VCCSPAl HL391 J R 390p 50V C e r a m i c CX 51 G3 RC KZO...

Page 43: ...R 4 7 0 1 8W CX 51 G3 R 5 6 0 1 8W R 4 7 0 ll8W R 12k 2W R 2 7k ll2W R 12k 2W R 2 2k 1 8W R 1 5k ll8W R 5 6 ll8W R 5 6 1J8W R 5 6 1l8W R 2 7k 1 2W R 2 7k 1 2W Carbon Carbon Carbon Metal Oxide Carbon Metal Oxide Carbon Carbon Carbon Carbon Carbon Carbon Carbon AA AA AA AA AA AA AA AA AA AA AA AA AA MISCELLANEOUS PARTS P851 QPLGN0441CEZZ R Plug 4 pin H P852 QPLGN054lCEZZ R Plug 5 pin K A SC851 QSOCV...

Page 44: ...ire K CX 51 G3 R Connecting Wire S CX 51 G3 AP AR AC AK AG AG AG AG AE SUPPLIED ACCESSORIES ACCESSORIES QANTR0018PEZZ R Rod Antenna CX 34G3 QPLGJOll BCEZZ R Antenna Plug Adaptor CX 34G3 RRMCG1342PESA R infrared R C Unit TiNS 6222PEZZ R Operation Manual AQ AG AU AG ACCESSORIES NOT REPLACEMENT ITEM UBATU0002AJZZ Dry Batteries TGAN 0068PEZZ Guarantee Cord CX 34G3 MODEL CX 34G3 SPAKC6280PEZZ Packing C...

Page 45: ...GCOVA0079PESA R LED Cover GCOVA0083PESA R R C Cover HBDGB0018PESA R SHARP Badge JBTN 0273PESA R Control Button JBTN 0272PESA R Power Button MSPRC0068CEFW R Spring for Power Button AC AD AE AF AD AA AY l l l 2 l 3 l 4 I 5 l 6 l 7 2 Not Available Front Cabinet GCOVA0079PESA R LED Cover GCOVA0080PESA R R C Cover HBDGB0019PESA R SHARP Badge JBTN 0273PESA R Control Button JBTN 0274PESA R Power Button M...

Page 46: ...ED No part of this publication may be reproduced stored in 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 21 Japan ...

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