Commodore CM-141 Service Manual Download | Manualshive

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Summary of Contents for CM-141

Page 1: ...CM 141 SERVICE MANUAL PN 314004 02 commodore COLOR VIDEO MONITOR JULY 1984...

Page 2: ...ing of any available replace ment part herein does not constitute in any case a recommendation warranty or guaranty as to quality or suitability of such replacement part Reproduction or use without ex...

Page 3: ...2 CONTENTS SPECIFICATIONS 2 SAFETY PRECAUTIONS 3 MAJOR CIRCUIT DESCRIPTIONS 5 CIRCUIT DESCRIPTIONS 6 BLOCK DIAGRAM 9 CHASSIS TOP VIEW 10 COMPONENT AND TEST POINT LOCATION 11 INSTALLATION AND SERVICE A...

Page 4: ...1 0Vp p 2 Chromlnance Signal Input Signal Type NTSC chrominance signal Input Level 1 0Vp p 3 3 Audio Input Signal OAV RMS max 3 4 Input Impedance Video Audio 4 Input Terminal 5 Horizontal Scanning Fr...

Page 5: ...ce radiatIOn In excess of desirable levels When the high voltage regulator is operating properly there is no possibility of an X radiation problem Every time a color chassis IS serviced the brightness...

Page 6: ...ated for higher voltage wattage etc Replacement parts which have these special safety charactenstlcs are Identified In this manual elec tncal components having such features are identified by and shad...

Page 7: ...usting points 3 Low Loss Vertical Output CircuIt The power loss In the vertical output circuit IS reduced by changing over from high voltage to low voltage In the front and back halves of the scanning...

Page 8: ...tch as above and the IIlstrument IS necessary to turn off for at least 30 seconds to function again 6 VERTICAL OSCILLATION DRIVE CIRCUIT Vertical oscillation and drive CirCUit are located In IC701 R60...

Page 9: ...it against over load and output short so addibonal protection circuit is not needed rent is going to decrease so that Ql IS switched off during small collector current and the output voltage is regula...

Page 10: ...sier than free frequency If locking to some frequency IS needed the primary Induc 5 Operation circuit for frequency iock ng 0907 R902 C914 C913 V n I I R904 I I I I t_ ______ P tance shall be determin...

Page 11: ...L l VI oEO FOCUS HIGH VOLTKf AMP 0 202 rsYNcl VERT BlK 60Hz r _____________J Hz I H V OSC H V DRIYE III 60Hz I ____ __ _ __ J 15750Hz r HOR 8lK 1575CHz VERT OUTPUT 60Hz VERT 0 601 0 602 DEF YOKE H OR...

Page 12: ...SSTRANv __ __ IC201 SWITCHING IC IC401 SOUND IC CHASSIS TOP VIEW R625 V CENTER T703 FBT L704 H WIDTH COIL CREEN FOCUS R731 R355 R DRIVE R351 B DRIVE R362 B BIAS R358 R BIAS R3S4 G BIAS HOLD DOWN IC701...

Page 13: ...C P T P W B o T20 I R609 IT VSIZE V Q601 IC701 Q p TP4 H HOLD r rR 08 IT P7 DL201 D T P 6 TP5 TP9 COLOR SYNC R314 EJQ L704 o t l IC301 IJ P301 V CENTER R625 C I f I L g V R731 l HOLD DOWN SUB BRIGHT...

Page 14: ...just Hold down VR R731 on the main Board for the voltage at TP7 the cathode voltage of 0703 IS 10 3 002V DC 5 After the adjustment ot the voltage fiX the Hold down VR R731 With silicon bond 6 Check th...

Page 15: ...the input signal 2 Remove the connector of the P351 3 Short the terminal TPI and TP2 with a jumber wire 4 Turn the screen control fully counterclockwise 5 By rotating the RED GREEN and BLUE bias contr...

Page 16: ...GURE 1 Circumference Convergence Adjustment 1 Loosen the clamping screw of deflection yoke to allow the yoke to tilt 2 Put a wedge as shown in figure 1 temporarily Do not remove cover paper on adhesiv...

Page 17: ...t I GRN t I l 6 POLE MAGNETS MOVEMENT Centre Convergence by Convergence Magnets 8 G R I 1 R 1__ 1 _18 G G 81 1 I R 1 t RGB I I I I I 711 I I 8GR I R G R G 8 B INCLINE THE YOKE UP OR DOWN INCLINE THE Y...

Page 18: ...211 RD 1 8W 5 6K R319 RD 1 8W 56K R212 RD 1 BW 5 6K R320 RD 1 BW 180 ohm R213 RD 1 BW 5 6K R322 RD 1 BW 470 ohm R214 RD 1 BW 10K R323 RD 1 8W B2K R215 RD 1 BW 10K R324 RD 1 BW 22K R216 RD 1 BW 10K R32...

Page 19: ...RD 118W 10K C207 CC 39pF 50 0 R708 J SR19R 10KS C208 CE 10uF 16V R709 RD 1 8W 47 ohm C210 CK 103pF 80 0 20G o R710 RD 1l 8W 470 ohm C211 CK 103pF 800 0 20 0 R7l1 RD 1 8W 47K C212 CK 103pF 80 20e c R7l...

Page 20: ...2pF 10 CEo 1uF 50V PP 562pF 10 200V CC 270pF 5 CK 103pF 80 200 0 CE 22uF 16V CE 33uF 16V CK 103pF 80 20 CO 333pF 10 CK 270pF 10 500V CK 820pF 10 500V CC 82pF 5 CK 560pF 10 PP 223pF 10 200V CE 33uF 25V...

Page 21: ...RGP10G D906 RGP10G 2 C P T PWB D907 RGP10G D908 RGP10G RESISTOR 0909 RGP10G D910 RGP10G R351 SR 290 330B 0921 RGP10G R352 RO 1 BW 160 ohm D922 RGP10G R353 RO 1 BW 1K R354 SR 19R 4 7 KB COIL AND TRANS...

Page 22: ...0352 KTC 2068 0353 KTC 2068 I I COIL L351 COil PEAKING 56uH l352 COIL PEAKING 56uH l353 COil PEAKING 56uH l354 COIL PEAKING 56uH SPARK GAP SG351 SPARK GAP SG352 SPARK GAP SG353 SPARK GAP MISCELLANEOUS...

Page 23: ...TION FIGURE KT 1959 KTA562 B KT 1815 O Y KDS1553 KDS1555 4 Il RD11E B2 2501138 Kl 2233 B 1N4002l1N4004 1N4005GP 1 I 4 STR470A 3 RGP10G KT 20681 2068 FA 1 B RU 1AVIRU 1V 1 If RH 1ZVIRH 1MV RD9 1EB KT 2...

Page 24: ...__ c C _ 30 l A _ NllfQB U _ __ 03270201 rnS2 SA _ _ _ _ J_ fiill f 4304 4 MA lAL r_ T_ _____ i 332 WASJ 1ER 03220 0 4 XH119A 0 m 07 14 4 R1S2 J PLATE ASSY fOO9 o rtAH ASS H D S j 3 2 rA i I lLOfR PW...

Page 25: ...PRINTED CIRCUIT BOARD 2 C P T P W S c 24...

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