Heath Zenith DC13-PF Series Service Manual Download Page 20 | Manualshive

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Summary of Contents for DC13-PF Series

Page 1: ...3 PF SERIES AND GDZ1320 COLOR MONITORS ZENITH RADIO CORPORATION PARTS AND SERVICE DIVISION 11000 SEYMOUR AVENUE FRANKLIN PARK ILLINOIS 60131 Copyright 1980 Heath Company All Rights Reserved Printed in the United States of America 595 2533 ...

Page 2: ...and under certain circumstances may produce radiation in excess of desirable levels 2 Only Zenith specified CRT anode connectors must be used The degaussing shield also serves as an X ray shield in color sets do not defeat its purpose 3 It is essential that the serviceman has available an accurate and reliable high voltage meter The calibration of the meter should be checked periodically against a...

Page 3: ...nts Required Line and Load Voltage Regulation 100 Solid State Modular Design All Components on Four Replaceable Modules UL and CSA Listed Conforms to the Technical Requirements of 21 CFR Subchapter J for X Radiation AUDIO 2 Volts P P High Impedance Audio System with Built in Speaker and Front Panel Volume Control Audio Input Jack Miniature Tip Type DIMENSIONS MATERIAL FINISH NET WEIGHT PICTURE TUB...

Page 4: ...y Do not use an excessive force To remove M10 board first remove the key lock holding ft le board down in place To remove key lock twist it 90 and pull it up Removal of M10 board if rest of module assembly is in place also requires unscrewing center screw from bottom edge of cabinet Disengaging edge con nectors from the boards occasionally requires removal of small holder tabs inserted into edge c...

Page 5: ...lts on 9 160 modules 25 KV or 1 500 volts on 9 160 02 modules 30 KV Remove the DC voltmeter from the Brightness Limiter test point Connect DC voltmeter set for positive reading from pin 1 of 221 96 IC U2226 to ground or across 22 ufd capacitor C2252 on 9 152 module Adjust brightness limiter control R2278 for 3 4 volts Remove DC voltmeter from pin 1 of 221 96 IC Remove the 10 K test potentiometer a...

Page 6: ...ing Focus Chassis Purpose To obtain best focus 1 Set brightness contrast and chroma for normal pic ture 2 Adjust for optimum focus in highlights Brightness Range and Brightness Limiter Adlustment Purpose To limit maximum brightness and prevent picture blooming 1 Wire a 10 K 1 4 watt potentiometer as a rheostat and connect in series a 3 3 K 1 2 watt carbon resistor this assembly to be used in step ...

Page 7: ...ss control so color bar area is gray 5 Adjust 3 58 MHz trap for minimum brightness in color bar area 5 Cross Talk Control Purpose To prevent color smear 1 Connect color bar generator to antenna terminals 2 Properly fine tune receiver and activate AFC 3 Ground vertical heatsink side of R2227 4 Adjust color level to approximately mid range 5 Starting from minimum brightness adjust brightness control...

Page 8: ... 15 01 b After the four pole magnet has been adjusted to superimpose the red and blue lines on top of one another use the six pole amplitude adjustment to place the converged blue and red lines over the green line Position the knob radially in a 30 arc from top dead center to move them vertically Rotating the knob laterally will move the converg ed beam to the left or right MASTER G 2 CONTROL ADJU...

Page 9: ...rightness con trol to produce a dim raster b The color of the dim raster will depend on which gun has the highest cut off point 7 c Adjust the Tracking Controls of the two missing colors to display a white raster NOTE One Tracking Control should always be in the full counterclockwise position 11 Display a cross hatch pattern on the screen and check for yoke tilt Tighten the yoke clamp 12 FOCUS ADJ...

Page 10: ...ntrols for the two missing colors to produce a white raster a Turn all three Tracking Controls to minimum 8 G l 8 G l SET UP POINT 8 G J SET UP POINT SETUP POINT FIGURE 8 A VERTICAL TILT OF THE DEFLECTION YOKE UPWARD OR DOWNWARD WILL ROTA TE THE RED AND BLUE RASTERS t l G 8 8 Ge t I I G I T I t9l 1 SETUP POINT I 8 G 8 8G G G 8 G8 G8 FIGURE 9 A HORIZONTAL TILT OF THE DEFLECTION YOKE WILL INCREASE O...

Page 11: ...P CONNfC TIONS w CRT SOCKET 101 5720 05 V IDEO MODULE SWEEP MODULE FIGURE 10 BUlLT IN TEST PA TTERN A spring loaded slide switch is located on the top rear of the cabinet When activated the switch will allow a vertical bar test pattern to be applied to the input of the video circuits COMPOSITE ViDEO IN TEST AUDIO IN BLACK LEVEL COLOR SHARPNESS W p p NEG SYNC 15a PATTERN 2V p p HI Z PICTURE DETENT ...

Page 12: ...capacitor part number 22 7639 15 or 15C 2 Install the capacitor as indicated in figure 12 NOTE The capacitor should be connected in parallel to resistor R1203 R1203 may b e labeled R203 on some modules However easy access is available to the component side and the fix requires only removal of the cabinet back r j I I I CIRCUIT I COMMON I TO I 9 171 I 3 171 01 I 9 171 02 I tm I Q1228 I I I I I I R ...

Page 13: ...I9 6 20 THIS END HARD HIRED OR USING SPECIAL CONNECTORS INTERCONNECT SCHEMATIC INTERCONNECT SCHEMATIC ONE UP ASSY a _ __INDICATES KEYING 0 BURNDY TYPE MDLEX TYPE CABLE CONF I GURAT I ON 9 152 b CHR A LUMINANCE SET UP VERT D VERT 4 1 2G BLANK Im 2F SA 2 1 201 IB 2C 2B 3C 2A 4K lR SL lR 4R 2R 3L 2L SR lR 6R 2R 3L rTTIl 3 J 15 16 17 14 19 iYOKE 16 1 S IbJlR 2L 2F SfI 38 58 4H SC ISA ISB Ise NORMAL LO...

Page 14: ...31 R2132 R2134 I RX2135 R2151 R2152 R2153 R21S4 RX2157 I RX21S8 RX21fi9 PRRT NUMBER DESCRIPTION 63 9922 28 RESISTOR FILM 220K OHM 5 1 4W 63 9921 92 RESISTOR FILM 6 8K OHM 5 1 4W 63 9922 16 RESISTOR FILM 68K OHM 5 1 4W 63 9921 72 RESISTOR FILM IK OHM 5 1I4 63 10585 CONTRO 2K OHM 20 VERTICAL HEIGHT 63 9922 13 RESISTOR FILM 51K OliM 5 1 4W 63 9922 45 RESISTOR FILM 1 1 MEGOHM 5 1 41 1 63 9921 88 RESIS...

Page 15: ...2G NORMAL R2154 I I C2177 U2151F T Ol 6BO 62 VDC CR2151 22 PF U2326C 12V m 21 C 151 R2351 470 14 11 15 16 1 12 13 10 17 C2352 15 R2357 820 G 56 C2329 5 U2326D 1 I __ t 8 IC2351 18 7 6 CHROMA 19 5MF 56PF 16V 5 221 140 20 21 22 8 2K C23S8 23 1 15 I I 24 3 I rlC2376 1 001 R2381 IC2380 L2376 R2354 t 82 CH 1 9 R2378 IK C2377 I 22PF R2352 390 1270PF R2376 510 1 8K R2377 390 20PF I L R2379 510 R2382 390 ...

Page 16: ...TOR CMlBON 2 2K OH tID 1 211 R ilot RESISTOR C RBON 2 7K OHM is 1 211 115109 CONTROl ROTARY SINGLE 500 OHM GREEN BACKGROUND R5110 6 3 10794 01 CONTROL flOT RY SINGLE 500 OHM flED BACKGROUND ItSI51 RESISTOR C flBON 1 0 OHM iIDS 1 2 flSI52 63 i947 26 RESISTOR FILM IIOK OHM 5 1 2 fl51S3 63 9946 45 RESISTOR FILM 75 OHM tS 211 RSIS4 63 9946 70 RESISTOR FILM 820 OHM is 112 RSt5S 63 7854 RESISTOR C RBON ...

Page 17: ...GREEN 10 Y R51S2 ISOK R5110 500 RED BIICKGROUND R5151 E l r lJ iNORHIIL 820 4 CR5152 i 10 2 f j Q5151 153 1 LUMINANCE 1 DRIVER SET UP PIN R5154 820 r i R Y INPUT Inr _t __ R Y______________ R Y__ G Y INPUT r _t ___G Y______________ G Y__ _ o LUMINIINCE S J r 255V U5105K 13 145K CSI04 Q5102 I 47PF VIDEO OUTPUT 15 18 U510SL 20 75K QS152 VIDEO OUTPUT n I RS162 GROUND INPUT Ib B Y INPUT _r B Y I 9 155...

Page 18: ...R THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER FROM THE AC TUAL ClRCUll USED THIS WIlY IIf t EMENTATION OF TI LATEST SAFETY AI O PERFORMANCE II F ROVEH NT CHANGES INTO THE SETS IS NOT OELAYEO UNTIL TI NEW SERVICE LlTERP TURE IS PRINTED CRlllCIIL SI II E TY ct P9 EH S1 THE LETTER 1N THE EL CfRtCIIl SCt MIInc NO PMTS LIST l Il nC HE tOWI ZENITH PIIRTS LIST 11ft SCtfEMATiC DESCRIPTION 9 1 0 9 9 160 0...

Page 19: ...ICATES INSU ATED _ JUMPER WIRE 7TEST V POINT B INDICATES KEYING ON MIlLE CONNECTOR REMOVED BOARD _EOI lev SU START UP VOLTAGE I l L ________________ _ L _ _ hl __ U v I I i I PERMAHENT FIltTORY SEllLEO CONTROL DO NOT DEFEAT FOR PROPER REPLIltEHENT SEE SERVICE INSTRUCTIONS I I i I iii I wiRE I 1IOfcr I 38 5 I I I I I I I 1 1 __IU _ IJ i rll I s 17 TO ORC I i I I I I I I I I ...

Page 20: ...l lIZ 15 9941 71 85 1i50 83 1741 63 101111 68 63 10115 86 63 1883 63 10142 63 21 18 63 9921 40 63 1921 72 63 9921 78 63 9121 80 63 1121 78 63 1921 16 63 1921 94 63 10884 06 6 1 1 21 12 63 1921 72 63 9921 72 83 9 21 88 53_9921_95 83 9921 11 63 n85 6S H21 8D 63 10565 10 63 10565 10 63 H47 20 63 8246 63 H21 14 63 121 88 6S 6913 6S 922 D6 63 9921 12 63 9921 8 63 10452 63 10442 8 63 10526 04 63 1921 48...

Page 21: ... 41 C330a r OOl 5 ENT FACTORY SEALED DO NOT DEFEAT FOR PROPER REPLACEMENT SEE SERVICE INSTRUCTIONS I C3338 047 R3330 690 2 I I I L t_l E31 ___j i X 3 2 ___ ____ _ J F SHEEP 15 I I rlllr l i 3 V I D I 11 I i L3303 R3323 2 7 1I2W R3324 2 7 1I2H C3315 C3314 r OOl 400 MEG I i t w FOCUS I I lOMEG WIRE 1 I I iT t i h Jt ilE 0 CLOSED 29 5MEG _2_0_M EG __ FOCUS I PDT WIRE I 33 1HEG ____ BOPO ST 38 5 I I I...

Page 22: ...7 I II LX1226 I J j 663UH L _ J 1 c132B rl00MF 25V lR1204 Q1201 SEE ABOVE 25V Q1226 R1201 CIRCUIT FOR NP R1202 9 171 01 330 R1205 i l lk1329 lSEE 2 7K LIST VIDEO R13S3 33K C1352 1150PF R1354 R13 6 10K 22K CR1376 NC I 14 CR1377 l R1355 1 2K R13 76 C1354 220K 0047 1 LC1326 1 015 10 SYNC SCRN PROCESSOR R1358 470 2L ll Jz f R 1 1 r 1 680 C1356 1 1 R13EO 1 2K 39PF L 1 I HORIZ LC1357 C1355 OSC T470PF T ...

Page 23: ... f l UX SOLDER FLUID HOLL IS 22 OIL SOLVENT CLEAN I NG 126 1901 SHIELD 204 724 OIl VIDEO MONITOR P NTED CIRCUIT BOA D 9 171 02 SAME AS 9 171 03 EXCEPT I II I C SI CI452 CI453 CI454 CI 5S CI 56 CI457 CI458 CI476 C1471 CI501 CI502 ICI451 Ie RI451 Ir RI452 I RI453 II 454 Ii RX1476 1 II 503 II QUANT lTV I I I A 0 0 122 7710 01 CAPA I TQR ELECTROLYTIC I IIF 50 101 SOY 22 7563 28 ICAPACITOR POLYE TER 22...

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