Service Manual 29E3 '1 8
Contents
1. 5 50 Location Description CAPACITORS No Part C101 Capacitor EL 4 70 120 50 C403 Capacitor PF 270pF 5 100V C102 Capacitor EL 1uF 20 50V C404 Capacitor PF 3300 5 SOV C103 Capacitor EL 0 47uF 203 50V C405 Capacitor luF 20 50V C104 Capacitor EL 2 2uF 20 50V C406 Capacitor 0 0150 45 50V C105 Capacitor EL luF 20 50V C407 Capacitor PF 2700pF 5 50 C106 Capacitor 0 014 3 10 50 C408 Capacitor EL lu 20 50 C107 Capacitor EL 47uF 20 25V C409 Capacitor EL 470uF 20 16V C108 Capacitor 270 5 50 C410 Capacitor PF 0 lur 5 63V C302 Capacitor 0 14 5 63 C412 Capacitor CD 3300pF 10 5000 C305 Capacitor EL 220uF 20 16V C413 Capacitor CD 390pF 10 500V C306 Capacitor EL 100uF 20 25V C416 Capacitor 3900pF 5 2KV C307 Capacitor 0 1uF 5 63V C417 Capacitor 3900 5 2 C308 Capacitor TE luF 120 35V C419 Capacitor 0 18uF 5 400V C309 Capacitor EL luF 20 50V C421 Capacitor EL 470 20 SOV C310 Capacitor EL 100uF 20 35V C422 Capacitor 5600pF 5 1 6KV C313 Capacitor EL 220uF 20 35 C423 Capacitor EL 4 7uF 20 100V C314 Capacitor EL 3300uF 203 25V C424 Capacitor EL 470uF 20 160V C315 Capacitor EL luF 20 50V C426 Capacitor EL 33uF 20 160V 6317 Capacitor EL 470uF 20 25V C427 Capacitor EL 330uF 20 35V C318 Capacitor 0 0274 10 100 C428 Capacitor PI2. 30KQ 258 1 2W C816 Capacitor CD 2 108V 1500pF 108 R274 Resistor __ CF 20KQ 15 1 6W C817 Capacitor CD 330pF 10 500V R292 Resistor CF 36KQ 5 1 6W C818 Capacitor 1000pF 10 3000 R293 Resistor 33 0 5 1 64 C819 Capacitor 330pF 108 500V R303 Resistor CF 56 5 1 6W C820 Capacitor 10 500V i C821 Capacitor EL 220uF 20 50V 306 Resistor CF 270KQ 5 1 6W C822 Capacitor EL luF 20 50V R307 Resistor 22KQ 5 1 6 C831 Capacitor EL 33uF 20 2500 R308 Resistor CF 18K 5 1 6W Capacitor EL R313 Resistor 10 0 5 1 60 C Capacitor EL uF 20 50V E C835 Capacitor EL 1000uF 420 35V R315 Resistor _ CF 2 2KQ 58 1 64 C836 Capacitor EL 2200uF 20 10V R316 Resistor CF 27KQ 5 1 6W C837 Capacitor PF 0 1uF 5 63V R318 Resistor CF 33KQ 45 1 6W C838 Capacitor PF 0 10 5 63V R319 Resistor CF 10KQ 52 1 6W pun Capacitor EL PED RM R320 Resistor 1 8 0 5 1 6 C Capacitor EL uF 20 6 3V C841 Capacitor PF O luF 420 400V R324 Resistor CF 30KQ 55 1 08 C851 Capacitor EL 100uF 420 16V R325 Resistor OMF 0 47Q 5 1W C852 Capacitor EL 10uF Not leak SOV R329 Resistor CF 4 7KQ 5 1 6W C901 Capacitor R330 Resistor OMF 100Q 5 2W C902 Capacitor 1500pF 10 SOV 52 C903 Capacitor PF 0 1uF 45 63V ROS Resistor ME SLO 155 2 11 R336 Resistor CF 560 5 1
3. B GAIN FOCUS SCREEN 2E VR112 VR4B1 VR455 VR451 VR353 VR35 1 VR458 VR454 VR456 VR354 VR442 VR901 VR902 CONTRAST ADJUSTMENT Turn the pot clockwise to increase the C NTRAST BRIGHTNESS ADJUSTMENT Brightness adjustment for the raster Turna pes clockwise to increase the rightness LASA A HORIZONTAL SIZE ADJUSTMENT fee AER Adjustment for horizontal raster size k Jj 7 HORIZONTAL POSITION ADJUSTMENT F E Adjustment for horizontal image position tL Ulla r VERTICAL SIZE ADJUSTMENT Adjustment for vertical raster size 5 VERTICAL POSITION ADJUSTMENT A Adjustment for vertical image position PARALLELOGRAM DISTORTION CORRECTION 2 Adjustment for parallelogram distortion ran PINCUSHION DISTORTION CORRECTION M 15 Adjustment for pincushion distortion V 1 1 TRAPEZOID DISTORTION CORRECTION Adjustment for trapezoid distortion VERTICAL LINEARITY ADJUSTMENT ABC E Adjustment for vertical linearity of top and bottom portion ABC 1 HORIZONTAL SYNCHRONIZATION ADJUSTMENT Adjustment the pot when the image flows laterally RED GAIN ADJUSTMENT GAIN CONTROL Turn the pot clockwise to increase j cain min GAIN MAK the RED color gain gt BLUE GAIN ADJUSTMENT Turn the pot clockwise to increase the BLUE color gain FOCUS ADJUSTMENT Adjustm
4. Ora P102A Plug TJC3 12A 2 5m P301 Plug 2663131 P401 Plug B2P LV IN P801A Plug B2P3 VH P801B Plug 176300 1 P802 Plug XH 2A 2 P810 Plug B2P LV TN P901A Plug EH 4A 2 5ram P902A Plug 1 1 P902B Plug TJCl 1Y P912A Plug PH 5A 2 0mm P913A Plug TJC3 4A 2 Sram P102B Plug EH 12AW 2 Snm 912 Wireharness GD5 SCN 5P 2 5mn B B Wire WHITE UL1007 AWG24 Wireharness GD6 UL1015AWG20 2P DY N Plug Wireharness GD7 UL1015AWG18 2P DY H Plug P901A Wireharness GD4 4P 3 P901B P102A Wireharness GD3 12P VR Plug P102B Wireharness 15P D SUB Plug VGA PC BOARD ASSEMBLIES 29E31S A Main Board 345 x 255 29E31S B Drive Board 143x108 29 315 Controls Board 199x33 PICTURE TURE V901 Picture Tube 735 701 22 or 735 706 22 735 707 22 or 68 5 696 1 99019 Picture Tube Socket 62510 2 4 15
5. REG CIRCUIT 1 1 1 1 1 1 1 1 1 1 1 1 Block Diagram vRo04 R 8LK RED OUTPUT 73SX701 22 or 73SX706Y22 89 5 G GLK 1 or73SX707Y22 I GREEN orAGBKSM696X OUTPUT 993 906 BLUE E Nr OUTPUT 0908 353 V SIZE VR384 LINEALI TY VERTICAL OUTPUT 35 POSITION VERTICAL POSITION 0309 VERTICAL COIL 7 3 HORIZONTAL COIL V OUTPUT Flyback trans Focus SOREEN HORIZONTAL OUTPUT TRANSFORMER 1403 NIGH VOLTAGE REGULATION GIRGUI Q491 BLK Pulse HORIZONTAL ORIVE 0408 9435 0436 TA HORIZONTAL DEFLECTION OUTPUT 412 H 2 CONTROL DISTORTION CONTROL 0424 0431 OIODE MODULATOR OUTPUT 0413 0414 0411 3 ADJUSTMENT 3 1 Horizontal Synchronization Adjustment input signal frequency VGA or naomi Adjust for VR442 H Hold so the Picture Hold 3 2 High Voltage Adjustment VR401 Adjust VR401 so that the anode voltage of CRT is approx 27kV Do not rotate VR401 after the factory adjustment because this adjustment affects X ray radiation protection 3 3 Geometry Adjustment Adjust
6. C925 Capacitor EL 3 3uF 20 50V C471 Capacitor EL 470 20 SOV C927 Capacitor EL 470uF 420 16V C474 Capacitor EL luF 20 50V C928 Capacitor EL luF 20 50V C481 Capacitor EL 10uF 20 50V C929 Capacitor 0 47uF 10 160V 48 Capacitor CD 3300 10 SOV C930 Capacitor EL 1uF 20 SOV C4A2 Capacitor PF 0 0luF 10 50V 93 Capacitor 150pF 5 50V C4A3 Capacitor 0 014 10 50 C932 Capacitor EL 1uF 20 SOV C4A4 Capacitor 0 14 3 5 63 C934 Capacitor CD 0 0luF Z SOV C4A5 Capacitor CD 27pF 5 50V C940 Capacitor CD 0 OluF Z SOV C4A6 Capacitor EL 22uF 20 16V C941 Capacitor CD 0 01luF 2 SOV C4A7 Capacitor EL 10uF 20 25V C942 Capacitor EL luk 20 SOV C4A8 Capacitor 0 014 10 50 C943 Capacitor EL 1007 320 50 801 Capacitor 0 220 20 250 1 C804 Capacitor 4700 20 250 RESISTORS C805 Capacitor 4700 20 250 101 Resistor CF 3 9KQ 15 1 6N Capacitor CD F 250 1 6808 Capacitor Cb 3300pF 208 AC250V R105 Resistor 4700 155 1 68 C810 Capacitor PF 0 033uF 15 630V R106 Resistor 470Q 5 1 6W C811 Capacitor EL 1000uF 20 200V R212 Resistor CF 18KQ 5 1 6 C812 Capacitor CD 24108V 1500pF 10 R269 Resistor gt CF 8 2KQ t5 1 6W ay Sor sae R271 Resistor 51 0 5 1 28 at C815 Capacitor 1000pF 10 500V 8272 Resistor
7. attempted anyone who is not thoroughly familiar with the precautions necessary when working on high voltage equipment 2 Always discharge the picture tube anode to the chassis to keep off the shock hazard before removing the anode cap 3 Perfectly discharge the high potential of the picture tube before handling The picture tube is highly evacuated and if broken glass fragments will be violently expelled FS circuit which prevents the receiver from producing an excessively high voltage even if the B voltage increases abnormally Each time the unit is servi ced the FS circuit must be checked to determine that the circuit is properly functioning following the FS CIRCUIT CHECK procedure on page 3 of this manual 3 The only source of X RAY RADIATION in this unit is the picture tube For con tinued X RAY RADIATION protection the replacement tube must be exactly the same tube as specif ed in the parts list 4 Some parts in this unit have special safety related characteristics for X RAY RADIATION protection For continued safety parts replacement should be undertaken only after referring to the PRODUCT SAFETY NOTICE below PRECAUTION 2 1f any FUSE in this unit is blown replace it with the FUSE specified in the chassis parts list 3 When replacing parts or circuit board wind the lead wires axound the terminals before soldering 4 When replacing a high wattage resistor oxide metal film in circuit board keep
8. the resistor 10mm away from circuit board 5 Keep wires away from high voltage or high temperature components 6 This unit can be operated under AC100 120volts 50 60Hz NEVER connect to DC supply or any other power HIGH VOLTAGE CHECK CAUTION There is HIGH VOLTAGE ADJUSTMENT on this chassis ADJ VR VR401 must be properly adjusted to insure the correct high voltage l Connect an accurate high voltage meter to the anode of the picture tube 2 Turn on the unit 100 white window Set the BRIGHTNESS at center and CONTRAST to the maximum 3 High voltage will be measured below 27 5kv 4 Rotate the contrast control to both extremes to be sure the high voltage does not exceed the limit under any conditions CAUTION The international hazard symbols in the schematic diagram and the caurzon The international hazard symbols in the schematic diagram and the 2 Display Unit 29 315 CAUTION The international hazard symbols in the schematic diagram and the parts list designate components which have special Characteristics important for safety and should be replaced only with types identical to those in the original circuit or specified in the parts list The mounting position of replacements is to be identical with originals Before replacing any of these components read carefully the PRODUCT SAFETY NOTICE on this page Do not degrade the safety of the receiver through improper servicing PRO
9. 00 CF 100 5 1 04 CF 6 8KQ 5 1 6W CF 100Q 5 1 6W CF 3902 455 1 6N CF 10Q 5 1 6W CF 82Q 5 1 6W CF 100Q t5 1 6W CF 100Q 5 1 6W CF 4 3KQ 55 1 6W OMF 15KQ 5 2W OMF 15KQ 5 2W OMF 15KQ 53 2W CF 7 5KQ 15 1 64 CF 5600 10 1 20 CF 4 3KQ 5 1 6W CF 1KQ 5 1 64 CF 3900 5 1 6W CF 10Q 5 1 6W CF 822 5 1 6W CF 1KQ 5 1 6 CF 1KQ 45 1 6W CF 10KQ 52 1 68 OMF 15KQ 5 2W 15 0 5 24 15 0 5 28 7 5 5 1 6W CF 5600 108 1 20 1 0 5 1 64 CF 750 5 1 64 CF 1K0Q 53 1 6 CF 3902 15 1 68 CF 6 80 53 1 6 CF 820 45 1 6 CF 1KQ 5 1 6 CF 750 45 1 68 OME 15 53 2W OMF 15800 5 2W ONF 15KQ 5 2W 750 5 1 64 CF 560Q 10 1 2W Location No Part R941 Resistor R942 Resistor R943 Resistor R944 Resistor R945 Resistor R946 Resistor R947 Resistor R948 Resistor R949 Resistor R950 Resistor R951 Resistor R952 Resistor R953 Resistor R954 Resistor R956 Resistor R963 Resistor R964 Resistor R965 Resistor R966 Resistor R967 Resistor R968 Resistor R969 Resistor R970 Resistor 01 Resistor RTO2 Resistor VR112 Resistor VR351 Resistor 08393 Resistor VR354 Resistor VR401 Resistor VR442 Resistor VR451 Resistor 08454 Resistor VRA55 Resistor VR456 Resistor VR458 Resistor VR481 Resistor VR901 Resistor 902 Resistor VR903 Resistor VR904 Resistor VR905 Res
10. 02 Transistor RN120 9303 1417838 0305 Transistor 25 1815 2 1815 0308 Transistor 25 4793 0309 Transistor 2541837 0312 Transistor RN2002 0314 Transistor 28 1015 2 1015 0402 IC LA7856 0403 Transistor 25 1815 2 1815 0404 Transistor 25 1385 25 2649 01 0408 Transistor 25 525 25 2382 0411 Transistor 2SC1815Y 2PC1815Y 0412 Transistor 25 5612 0413 Transistor 258688 25 1940 0 0414 Transistor 2SA1015Y 2PA1015Y 0424 IC 4558DD TA75559P 0435 Transistor 25 1959 0436 Transistor 25 562 0447 Transistor 28 1815 2 1815 0491 KA3843B UC3843 Q4A2 Transistor 2SA1015Y 2PA1015Y Q801 IC STR M6511 0802 Transistor 2SC1815Y 2PC1815Y Q821 IC 7812 78125 0822 Transistor 25 1815 2 1815 0823 Photo Coupler 511 5 TLP621 GR Q826 Photo Coupler TLP621 GR Q827 IC 58105 0851 Transistor 259 1815 2 1815 0852 Transistor 25 1815 2 1815 0901 Transistor 25 5147 0902 Transistor 25 1815 2 1815 0903 Transistor 25 5147 Location Description No Part 0904 Transistor 29 1815 2 1815 0905 Transistor 2SC5147 0906 Transistor 28 1815 2PC1815Y 0908 Transistor 2SA1020 0909 Transistor 25 1815 2 1815 0910 Transistor 2SC945 2SC1815Y 9912 M52327SP 0913 Transistor 25 1015 2 1015 0918 Transistor 25 1815 2 1815 D101 Diode Zener 234 2 37 D102 Diode Zener 2B4 2CW37 1213 Diode 1N4
11. 148 D214 Diode Zener 20A 2CW37 D216 Diode 184148 D301 Diode 1N4001 1302 Diode SC570A D303 Diode RGP10J D401 Diode EMV 3GMR D402 Diode RP3F D406 Diode 1N4148 D407 Diode HER104 191887 D408 Diode Zener 15A 2CW37 D409 Diode Zener 16A 2CW37 D410 Diode HER104 EU2A D413 Diode 1N4148 1414 Diode 1N4148 1416 Diode 1N4148 D417 Diode Zener 15B 2CW37 D425 Diode HER104 2 0426 Diode HER104 2 D430 Diode Zener 305 572 D471 Diode HER104 EU2A D480 Diode Thyristor BT169 1484 Diode Zener MT ZJ27C 1042 Diode 1N4148 0482 Diode 1N4148 D4A3 Diode 1N4148 D4A7 Diode 1N4148 D4A8 Diode 1N4148 D810 Diode HER308 93016 D811 Diode Bridge 4A 400V KBLOG D812 Diode Zener 581 BS72 D813 Diode HER104 1014 Diode HER104 1815 Diode HER104 1816 Diode Zener 30S BS72 D817 Diode Zener 10A 2CW37 D821 Diode FML G14S 0823 Diode FML G14S D824 Diode EMP G12S EMP G12S 0825 Diode EMP G12S FMP G12S D826 Diode HER302 1827 Diode Zener 15A 2CW37 D836 Diode 1N4148 0851 Diode 1N4148 1852 Diode Zener 5S1 572 0901 Diode 144148 1902 Diode 14148 Description 14 Display Unit 29 315 No Part D903 Diode 1N4148 D904 Diode Zener 9A1 2CW37 D917 Diode 1N4148 D918 Diode 1N4148 D919 Diode 1N4148 D920 Diode 1N4148 D921 Diode 1N4148 D922 Diode 1N4148 D925 Diode Zener 10A 2CW37 MISCELLANEOUS F801 Fuse Holder 801 Fuse 4A 504 K801 Relay JOX 14FC 12 0412 sheet M 45 or P101A Plug PH 3A 2
12. 2200pF 5 1 6KV C320 Capacitor 0 01 10 50 C429 Capacitor EL 100uF 420 25V C323 Capacitor 8200 10 50 C430 Capacitor 0 224 5 400 C324 Capacitor CD 5P 5 100V C432 Capacitor CD 6800 10 50V C328 Capacitor EL 10uF 20 50V C433 Capacitor EL 33uF 20 160V 10 Display Unit 29E31S C434 Capacitor 0 270 310 100 C904 Capacitor CD 1500pF 10 50V C436 Capacitor 0 108 25 63V C905 Capacitor 0 14 5 63 C437 Capacitor 33uF 20 50V C906 Capacitor CD 1500pF 10 SOV C438 Capacitor EL 470uF 20 25V C907 Capacitor CD 2 108V 4700pF 20 C908 Capacitor EL 100uF 20 25V Location Description No Part Location Description No Part C439 Capacitor EL 33uF 20 35V C440 Capacitor 0 14 5 63 C910 Capacitor CD 0 0luF Z 50V C441 Capacitor EL 10uF 20 SOV C911 Capacitor EL 47uF 20 25V C442 Capacitor PF 0 01luF 10 50V C912 Capacitor EL 47uF 20 25V C446 Capacitor EL 10uF 20 50V C913 Capacitor EL 47uF 20 25V C447 Capacitor EL 10uF 20 50V C915 Capacitor EL 100uF 20 25V C449 Capacitor PF 0 47uF 5 AC250 C917 Capacitor CD 0 01uF 2 50V C452 Capacitor 10uF 20 SOV C919 Capacitor CD 0 01luF 2 50V C453 Capacitor PF O luk 5 63V C921 Capacitor CD 0 01uF 2 SOV C454 Capacitor CD 390pF 10 500V C922 Capacitor EL 3 3uF 20 50V C456 Capacitor ELN 10uF 20 50V
13. 6W R487 Resistor 68002 5 1 6W R338 Resistor 47 0 5 1 64 R490 Resistor CF 27 5 1 2W Location Description No Part Location Description R491 Resistor CF 470Q 5 1 6W No Part R492 Resistor CF 2 2KQ t52 1 68 R339 Resistor CF 39KQ 5 1 6W R493 Resistor CF 6 8KQ 5 1 0W R347 Resistor CF 0 820 45 1 2W 494 Resistor CF 100KQ 5 1 6W R351 Resistor CF 7 5KQ t5 1 6W R495 Resistor CF 220KQ 45 1 6W 352 Resistor CF 100KQ 5 1 6W R497 Resistor CF 1KQ 52 1 6W R404 Resistor 6 8 0 5 1 64 R498 Resistor CF 2 4KQ t5 1 6W R405 Resistor CF 12KQ 5 1 6W R499 Resistor CF 100 452 1 6W R406 Resistor CF 22KQ 45 1 6W R4AO Resistor CF 9 1KQ 45 1 6W R407 Resistor CF 5 6KQ 5 1 6W R4AL Resistor CF 200KQ 5 1 6W R408 Resistor 0 339 5 1W R4A2 Resistor CF 7 5KQ 15 1 6N R410 Resistor CF 3 3KQ 53 1 6W R4A3 Resistor CF 1KQ 55 1 6W R411 Resistor CF 10KQ 15 1 4W R4A4 Resistor CF 470 45 1 6W R412 Resistor CF 27KQ 5 1 6W R4AS Resistor 4 7 5 1 6 R413 Resistor 2 2 0 5 1 64 47 Resistor CF 10Q 5 1 6W R414 Resistor __ CF 33KQ 45 1 6W R4A8 Resistor CF 10KQ 5 1 6W R415 Resistor CF 1KQ 5 1 6W R4A9 Resistor 1 0 5 1 60 R416 Resistor CF L0KQ 5 1 40 4 1 Resistor CF 10Q 5 1 6W R417 Resistor CF 47 5 1 4W R4B2 Resistor 5 1 0 5 1 64 R419 Resistor CF 12KQ 5 1 4W R4B3 Resistor CF 10KQ 5 1 6W R420 Resistor
14. CF 12KQ 5 1 4W R4B5 Resistor CF 1KQ 5 1 6W R421 Resistor 100 5 1 24 R4B6 Resistor CF 4 7KQ 45 1 6W R422 Resistor CF 1KQ 15 1 6W R4B7 Resistor 1 0 45 1 64 8423 Resistor CF 820 5 1 20 R4B8 Resistor CF 1KQ 52 1 6W R424 Resistor OMF 150KQ 5 2W R4B9 Resistor CF 3600 5 1 2W R429 Resistor CF 330Q 45 1 2W R4C8 Resistor 2 7 0 5 1 64 R430 Resistor CF 75KQ 5 1 6N R802 Resistor 1 2 0 10 1 20 R436 Resistor CF 2 2KQ 5 1 6W R808 Resistor PIC Thermistor R440 Resistor OMF 1000 45 3W PTH451A300BG3R0QL40 R444 Resistor CF 510 45 1 6W R810 Resistor OMF 33K 45 3W R447 Resistor CF 33KQ 45 1 6W R812 Resistor CF 270KQ 45 1 4W R450 Resistor R451 Resistor R454 Resistor R455 Resistor R456 Resistor R459 Resistor R460 Resistor R461 Resistor R462 Resistor 463 Resistor R467 Resistor R471 Resistor R477 Resistor R478 Resistor R480 Resistor R481 Resistor R484 Resistor CF 5 6KQ 5 1 6W CF 51Q 5 1 6W 3600 53 1 2W CF 2 70 5 1 28 FR 0 399 45 1 2W CF 7 5KQ 1 2W CF 1800 52 1 6W CF 470KQ 153 1 68 CF 10KQ 5 1 68 CF 10KQ 5 1 6W CF 30KQ 5 1 6W 2 70 5 1 24 CF 100KQ 53 1 6W CF 15KQ 5 1 4W CF 1 5KQ 45 1 64 1 2 5 1 6 CF 8200 5 1 6W R813 Resistor R815 Resistor R816 Resistor R817 Resistor R818 Resistor R819 Resistor R820 Resistor R821 Resistor R822 Resistor R823 Resistor R824 Resist
15. DUCT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety related characteristics These Characteristics are often passed unnoticed by a visual inspection and the protection afforded by them can not necessarily be obtained by using replacement components rated for higher voltage wattage etc Replacement parts which have these special safety characteristics are identified in this manual and its supplements electrical components having such features are identified by the international hazard symbols on the schematic diagram and the parts list Before replacing any these components read the parts list in this manual carefully The use of substitute replacement parts which do not have the same safety Characteristics as specified in the parts list may create shock fire X ray radiation or other hazards FS CIRCUIT CHECK The fail safe FS circuit check is indispensable for the final check in the Servicing Checking should be done following the steps below l Turn the power switch on and adjust controls for nominal operation 2 Temporarily short terminal the D484 on main board with a jumper wire Raster will disappear 3 The unit must remain in this state even after removing the jumper wire This is the evidence that the FS circuit is functioning properly 4 To obtain a picture again temporarily turn the power off and allow the FS circuit more than 30 seconds to reset Then turn the powe
16. Display Unit 29 315 29 CRT Display Unit ver Service Manual 202E E31S Rev B Contents Safety Instructions Specificaion Circuit Block Diagram Adjustments Adjustment Controls Layout Replacement Parts List Circuit Diagram SANWA Electronics Co Ltd Kokonokaichi Kamihayasi mura Iwafune gun Niigata 959 3446 JAPAN TEL 81 254 665611 81 254 865599 SAFETY INSTRUCTIONS 1 WARNING BEFORE SERVICING THIS CHASSIS READ THE X RAY RADIATION PRECAUTION SAFETY PRECAUTION AND PRODUCT SAFETY NOTICE DESCRIBED BELOW X RAY RADIATION PRECAUTION 1 Excessive high voltage can produce potent ially hazardous X RAY RADIATION To avoid such hazardous the high voltage must not b e above the specified limit The nominal va lue of the high voltage of this unit is 27k V at zero beam current minimum brightness between 85 132V AC power so urce The high voltage must not under any circumstances exceed 27 0kV Each time a unit requires servicing the high voltage should be checked following the HIGH VOLTAGE CHECK procedure on page 2 of this manual It is recommended that the reading of the high voltage be recorded as a part of the service record It is important to use an accurate and reliable high voltage meter 2 This unit is equipped with a Fail Safe SAFETY 1 Potentials as high as 27kv is present when this unit operating 1 Servicing should not be
17. Syne 1 5Vpp L 14 sepa syne 3 5vpp AA RECOMMENDED SIGNAL TIMING 31 69KHz HORIONTAL TIMING UNIT u sec Video 0 1Wp p 150 Black Revel 1 07 5 0Y8 5 x Nc MINI aea 3 22 87dot 1 60 43d0t 04 82404 VERTICAL TIMING P UNIT msec Video 0 7 750 Black Revel 3 0 5 0 1 04 39H 0 44 14H 16 72 530H 0 09 3H Table 1 5 29E31S Display Un 2 CIRCUIT BLOCK DIAGRAM Mai 2 2 4 2 2 2 D 4 D 1 3 1 1 ai VR48 BRIGHT VR153 CONTRAST VR903 SU8 CONT awaqa ns D VIDEO INPUT R ka YR901 R GATN VIDEO 2 19 CONTROL VIDEO INPUT G yA n VIDEO INPUT 9 here VR902 B GAIN 2912 M52327SP s SYNC INPUT H S COMP S vs E 1 f 1 1 E 1 1 1 t 1 oe a 1 4 ES SYNC PROCESSOR 1 Qin SAtoTas aana H LA7856 3 m 451 H POSITION H VR442 H HOLD 1 D D 1 1 1 i D 1 3 1 1 i 200V VIDEO OUTPUT v OUTPUT 1 DEF OUTPUT 31 90 132v f STR M6511 29 VERTICAL OUTPUT VERTICAL POSITION HORIZONTAL DRIVE GAUSS ING CIRCUIT VIDEO SIGNAL SW SYNC PROCESSOR VIDEO CONTROL HEATER
18. ent the beam focus to the optimum SCREEN ADJUSTMENT Adjustment raster brightness to cutoff point back raster just disappear CHASSIS REPLACEMENT PARTS LIST WANING BEFORE SERVICING THIS CHASSIS READ THE X RAY RADIATION PRECAUTION SAFETY PRECAUTION AND PRODUCT SAFETY NOTICE ON PAGE 2 OF THIS MANUAL CAUTION The international hazard symbols in the schematic diagram and the pa rts list designate components which have special characteristics important for safety and should be replaced only with types identical to those is the origi nal circuit or specified in the parts list The mounting position of replacements is to identical with originals Before repelacing any of these components read carefully the PRODUCT SAFETY NOTICE on page 3 Do not degrade the safety of the receiver through improper servicing NOTICE The part number most be used when ordering parts in order to assistIn processing be sure to include the Model number and Description Model 29 315 ABBREVIATION Capacitors CD Ceramic Disk PF Plastic Film EL Electrolytic TE Tantalum Electrolytic EIN Non pole Resistors CF Carbon Film OMF Oxide Metal Film VR Variable Resistor FR Fusible Resistor ALL CD and PF capacitors are 5 50V and all resistors 5 1 6W unless otherwise noted Location Description C401 Capacitor 100pF 5 50V No Part C402 Capacitor 1000
19. istor VR906 Resistor Description CF 680 55 1 69 CF 6800 45 1 68 CF 1 2KQ 5 1 4W 3600 5 1 4W CF 1000 5 1 6W CF 9 1KQ 5 1 6W CF 4 7KQ 45 1 6W CF 9 1KQ t5 1 6W CF 4 7KQ 5 1 6W CF 9 1KQ 5 1 6W CF 4 7KQ X58 1 68 CF 5 6KQ 5 1 6 CF 5 1KQ 5 1 6W CF 10KQ 5 1 6W CF 6800 15 1 6W FR 2 2Q 5 2W CF 1KQ 55 1 6 CF 1KQ 5 1 6W CF 2 4KQ 45 1 6W CF 1 8KQ 5 1 6W CF 2402 45 1 08 OMF 510Q 5 1W CF 562 5 1 6W CF 1KQ 5 1 6W CF 2 2KQ 5 1 6W VR 5KQO 3W VR 10KQ0 3W VR 1KQ0 3W VR 1K20 3W VR 10KQ0 3W VR 5K20 3W VR 2KQ0 3W VR 2000 0 3W VR LOKQO 3W VR 20KQ0 3W VR 20KQ0 3W VR SKQO 3W VR 5KQ0 3W VR 5KQ0 3W VR 50KQ0 3W VR 5KQ0 3W VR 5KQ0 3W VR 5KQ0 3W 13 Description COILS amp TRANSFORMERS 1301 Coi Choke 56uH 3142D HA 56uH L401 Coi Linearity 15T31A 1403 Coil Ferrite Bead 3 3uH 1404 Coi Choke CH 900 1405 Coi Choke 3155D 1406 Coil Choke 3155D 1408 Coi Choke 3155 1410 Coil Ferrite Bead 1411 Coi Ferrite Bead 1801 Coi De Magnet SLXC74 01 1811 Coi Ferrite Bead L812 Coi Ferrite Bead 1911 Coil Peaking 100uH 1912 Coi Peaking 100uH T401 Transformer 47 T403 Transformer Pulse PT153KHA T462 Transformer Flyback T801 Transformer Line Filter LCL35 HA T803 Transformer Converter DT 432 2HA SEMICONDUCTORS Q101 IC BA7078S 03
20. ment of geometry should be made following procedure Horizontal Position Adjustment with VR451 H POSI vertical Linearity Adjustment with VR354 V LIN GVertical Position Adjustment with VR351 V POSI G Horizontal and Vertical size adjustment with VR455 H SIZE and VR353 V SIZE GPincushion Amplitude Correction PIN VR454 OT B Trapezoid Correction T B TRAPE VR456 DParallelogram Correction PARA VR458 Repeat above procedure for the optimum geometry 3 4 White Balance Adjustment Adjustment of White Balance should be made following procedure Before performing adjustment preset the controls 112 9903 9 901 VR902 VR904 VR905 VR906 to the center and warming up of the set for 30 minutes Receive black video signal Increase the screen gradually and set it to the position where the first appeared color lights up slightly adjust the cutoff VR s R BLK VR904 G BLK VR905 B BLK VR906 of two other colors which were not appeared in step D for the 9700k color temperature x 0 285 0 02 y 0 285 0 02 Y 10 2 Rotate the screen to adjust the brightness of back raster just before disappeared Receive 100 white window signal Adjust the color temperature to 9700K with gain VR s R gain VR901 B gain VR902 and Sub CONT VR VR903 0 285 0 03 0 285 0 03 120 3 BRotate the Contrast VR VR112 to the minimum Adjust the cutoff VR s R BLK VR904 G BLK VR905 B BLK VR906 of two other colors
21. ontal 2 Vertical See the recommend timing below 1 1 AC Input 15 connector 2 53918 Input D SUB 15 PIN SIZE 540 8mm 405 6mm 1 8 IMAGE CHARACTERISTICS 1 Linearity Horizontal within 10 Vertical within 8 2 Image Distortion H V trapezoid within 3 Pincushion within 3 Tilt within 40 3 Mis Convergence Zone within 1 5mm Inside a circle of 60 diameter of the screen height Zone B within 2 5mm Inside a circle of a diameter equal to the screen height except zone A Zone C within 3mm Outside the zone A B 4 Jitter Not identified 50mmm away from CRT 5 Video Resolution 676 dots x 625 lines calculated by effective screen size phosphor dot pitch Clock Frequency 20MHz Typ 6 White Balance x 0 285 0 02 0 285 0 02 Color Temperature Approx 9700K 1 9 AMBIENT CONDITION 1 Temperature Operating 0 40T Storage 10 60 C 2 Humidity Operating under 70 Storage under 80 2 0 DIMENSION 594 x624 x488 D mu 2 1 WEIGHT Approx 43 0kg Display Unit 298315 INPUT SIGNAL CONNECTOR 1 AMP 15 PIN 2 D SUB 15 PIN SPECIFICATION Posi 0 7Vpp 750 Input Nominal Voltage Input Nominal Voltage Input Degauss Connection to SW Degaussing Switch Degauss Connection to SW Degaussing Switch AC Input 13 H SYNC CS
22. or R825 Resistor R826 Resistor R827 Resistor R828 Resistor R831 Resistor R833 Resistor Cement 8 22 45 TW CF 6 8KQ 5 1 2W CF 8 2KQ 5 1 2W OMF 3302 45 2W OMF 0 18Q t5 2W OMF 0 18 45 2W 4700 t5 1 2W CF 1KQ 15 1 6W CF 5102 5 1 6W CF 4700 5 1 6W CF 470Q 5 1 2W CF 10KQ 5 1 6W CF 5 1 6W CF 3 9KQ 58 1 6W CF 1KQ 5 1 2W CF 470KQ 5 1 4W OMF 0 120 5 2W 12 R838 Resistor CF 3KQ 5 1 2W Location No R839 R840 R842 R851 R852 R853 R854 R855 R857 R901 R902 R903 R904 R905 R906 R907 R908 R909 8910 R911 R912 R913 R914 R915 R916 R917 R918 R919 R920 R921 R922 R923 R924 R925 R926 R927 R928 R929 R930 R931 R932 R933 R935 R936 R937 R938 R939 R940 Part Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Description OMF 6 8KQ 5 1W CF 1502 5 1 6W 6 8 0 5 19 CF 10KQ 5 1 64 CF 20KQ 5 1 64 CF 1KQ 5 1 6W CF 120Q 45 1 28 CF 3 3KQ 5 1
23. r switch on to produce a normal picture Fail safe circuit The fail safe circuit samples horizontal pulses of a flyback transformer should the high voltage rise above normal limits The fail safe circuit activates and prevents excessive anode voltage from being developed Troubleshooting guide for fail safe circuit picture i3 seen YES picture when shorting FS circuit is functioning pxoperiy p B4 Kathode voltage is around 25 Refer to troubleshooting No Defective D471 R471 High voltage output circuit Display Unit 29E31S 1 SPECIFICATION 1 1 29 inch 108 deflection Full Square Picture Tube Dot pitch 0 0 0 80mm at center 96mm at corner 64mm vertical Phosphor 22 1 2 POWER INPUT 1 Voltage 100 to 120V 2 Frequency 50Hz 60Hz 3 Input current 2 5A maximum 4 Inrush current 72Ap p max 5 Power dissipation 160208 1 3 SCANNING FREQUENCY 1 Horizontal fH 31 5KHz 500Hz Retrace Time 2 Vertical V Retrace Time 1 4 SIGNAL INPUT 1 Video Signal a Analog R G b Positive 0 Impedance 7 2 Syne Signal a Horizontal within 5 55 70Hz within lmsec B 7v 5Q terminated composite sync 1 5Vpp separate sync 3 5Vpp b Vertical separate sync 3 5Vpp 5 SIGNAL TIMING Table 6 INPUT SOCKET 7 DISPLAY SCREEN 1 Horiz
24. which were not appeared in step D for the 9700K color temperature x 0 285 0 03 y 0 285 0 03 3 5 Focus Adjustment Adjust the focus of all over the screen to the optimum E Display Unit 298315 4 ADJUSTING CONTROLS LAYOUT MAIN BOARD O O oM a OOOO oO pac CONTROLS BOARD 0 ces Y 2 4 40UNC Display Unit 298215 9 B LI E lt gt ssp D Q E NAE T y 143 CRT DRIVE BOARD O SUB CONT VR903 SUBCONTRAST ADJUSTMENT Adjustment for the maximum CONTRAST Q R BLK VR904 RED CUTOFF ADIJSTMENT Turn the pot clockwise to inerease the red color 8 G BLK VR9095 GREEN CUTOFF ADJUSTMENT Turn the pot clockwise to inorease the green oolor UE CUTOFF ADJUST B BLK VR906 rn the He SO CONNECTOR inorease the ue color FOR DEFLECTION YORK POLARITY SWITCH P301 NEN NORMAL REVERSE 5 9000 81009 J j norma ime toe end Porton SE fw n o AWAQ VIANVS iil right end left 180 degree reversed image rotated imago CONTRAS BRIGHT H SIZE POSI V SIZE V POSI PARA PIN AMP Q T B TRAP V LIN HOLD GAIN
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