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Содержание Commodore Plus/4

Страница 1: ......

Страница 2: ...e unit to the Serial 1 0 Connector CN2 located at the rear of the Computer Carefu lly insert the diskette so that the label on the diskette is facing up and the notch on the diskette is on the left side Once the diskette has been inserted close the protective gate by pushing down on the gate lever To load a program from the diskette type LOAD PROGRAM NAME 8 and press the RETURN key To save a progr...

Страница 3: ...orted Diode CR1 D Connect the Power Supply to the Computer press Power Switch SW1 On and check for 13 8V at the positive end of Electrolytic C7 0 MAIN BOARD PROCESSING II A If the power supply Is normal but the Computer does not come up when powered check for a clock waveform at pin 1 of CPU IC U2 and also check IC U2 by substitution C If Computer comes up but not in Basic Ready mode check Basic R...

Страница 4: ...TOR FmCT2 WVIDEO LEVEL 1 5 El 041 010 AHP i sv CN8 YI 4 318181ftr LED POIIER I It JCATOR If 9V 1 6V EXPAHSION OSCILLATOR Q2 U23 BASIC ROO 21 71 40 3 D D 2 I CH3 FRONT vIEW 13 8V U2 21 71 U24 KEYBOARD PRELIMINARY SERVICE CHECKS Continued C7 z oosr sv IO SVAC RESET SIi2 POIIER SI f Pl Y PI 1 POlARIZED 120VAC INTERCONNECTING DIAGRAM III ...

Страница 5: ...T RF MODULATOR M1 CHANNEL f1B SELECTOR SWITCH 5V MAIN BOARD IV AUDIO AMP CN8 PIN 1 KEYBOARD CN7 A r EXPANSION PIN 1 PIN 1 CN4 U25 U26 PRELIMINARY SERVICE CHECKS Continued 3F r OTOR SERIAL DRIVE PIN 1 PIN 1 PIN 1 1 0 U1 Q4 U19 U2 CN2 CR1 MAIN BOARD V 3 0 00 03 m3 r O 0 O cn o Am ...

Страница 6: ...SEE PAGE 3 ...

Страница 7: ... 01 C17 900100 25 C18 900100 25 CRl 251026 01 CR2 900927 01 Fl 903556 18 L4 9011 52 01 LED Ml 251311 01 TOOLS Phillips Screwdriver Low Voltage Soldering Iron Desoldering Tool Alignment Tool GC ELECTRONICS 5000 5009 8276 Small Screwdriver REPLACEMENT PARTS DESCRIPTION Eleclrolylic 2200 F 16V Trimmer Oscillator 40pF Electrolytic 10JLF 16V Electrolytic 10JLF 16V Diode Bridge Rectifier 2B4 E Diode Zen...

Страница 8: ...on scope 7 Do not remove or install boards floppy disk drives printers or other peripherals with power On B Do not use freon propelled sprays These can generate electrical charges sufficient to damage semiconductor devices 9 The Computer cabinet is equipped with vents to prevent heat build up Never block cover or obstruct these vents 10 Instructions should be given especially to children that obje...

Страница 9: ...st 62nd Street P O Box 7092 Indionapolis Indiana 46206 U S A Th lin ing of any available r plac m nt port her in do not onstitut In Iln co Il re ommendlltlon wllTrllnty or gUCl onty by Howord W Somt Co In Ot to th quolity and luilobllity olluch r plac ment pelrl Th numbeu D lthet porh hove be n compiled from informDtion furnilhed 10 Howo d W Soml Co In by th mllnuiodu 01 th porllculllr type of pla...

Страница 10: ...S W CST SEHSE s W 73 8 P U24 I W 15 P IrERHAL I W 76 4 W 22H 8H0S8773 PART OF U6 8H0S8772 PART OF U4 P 1 4V 17 P I W 78 P I IV 1 00 07 02 D3 0 05 06 01 He S W AO P 10 2 W w Ne A7 P 9 IV A2 P 2 W 8 P I IV A3 1 P IV A 6 P AS 5 IN A6 IV P A1 3 IN AI A9 A70 P 00 1 4V 71 P 07 4V 12 P 02 1 4V 1 P I W 15 D3 P I W 16 0 1 4V P 05 17 P 06 I W 18 I IV P 07 19 B J3 A All I Z I s W 74 B P 2 IV 221 A12 A P A73 ...

Страница 11: ...101 J J3 I IV h 0 i3nllY H Al 2 1V P SH LS17SN T74LS27BJ 4 W 6 CI LOIt D 3 lVI I u E PART OF U22 74LSl39 Iii I A13 n W 1 P U21 H 4 W 7 C2 LOIt P A2 irl2 11Y IV U20 P 1 10104 26 2 1V 5 FLJP FL I 14 J L 1 lVf1 2 KERNALCS1 P I rL S o i I IV H A15 7 2 1V p 103 l 1 2 I IV T74LS278J IIY t NC oiI PI 4 W r FtilCTJQN Hl p DECOOER r I IV PART OF U22 r 1i 31Vh E t _ 3 s L I 1 lVlfrNC 11y r 18 1 111Y 4 W P P ...

Страница 12: ... MULTIPLE LINE SEE PINOUTS TERMINAL GUIDES AND SCHEMATIC NOTES PAGES B 19 14t RF HOOULATOR J 1 4V C2t 1 S DV PHOTO CIRCUITRACE SCHEMATIC CIRCUITRACE ll e 2SC9 S 5 SOV CHt F81 L S DV R9 1000 R8 lOOK POWER SUPPLY Q3 ALOI0 AIf Rt3 tooo S DV LINE IDENTIFICATIONS ASSIGNED FOR REFERENCE RH 2 0 PART OF SWt POWER 1 t 2 1 1 o l C5 22 C 22 C6 tOOV 22 to CRt 284 E t tOJ RF OUTPUT LUM COj OR IT Ib F8 1 CN1 r ...

Страница 13: ...MAIN BOARD 4 U14 PIN 1 PIN 1 U7 PIN 1 U3 PIN 1 U6 MAIN BOARD 17 3 0 00 03 m3 f o lJ o o cnl J i m ...

Страница 14: ...MAIN BOARD 16 13 8V 5 0V A Howard W Sama tII ji3iilii j3j Photo MAIN BOARD 5 o o CD 3 0 00 03 m3 r o V o o Cf D c m ...

Страница 15: ...1 2 3 4 5 6 2 3 4 5 6 A Howard W SamsM Ii u tJiW Photo 7 8 9 10 11 12 13 14 15 7 8 9 10 11 12 15 16 17 18 19 20 21 22 23 24 16 17 18 19 20 21 22 23 24 25 26 27 28 25 26 27 28 A B C 0 E F G H J K L M N 0 P MAIN BOARD 15 3 0 00 03 m3 r o 0 o C IJ Am ...

Страница 16: ...F 25 C34A 0 22 FB34 B 4 R24 F 25 C35 J 23 FB35 B 5 R25 F 25 00 C36A 0 23 FB36 C 4 R26 B 1 9 e C37 J 24 F837 C 5 R27 B 19 m C38A 0 24 F838 8 4 RP1 C 4 0 C39A 0 26 FB39 B 4 RP2 C 7 lie o C40 J 26 FB40 B 4 RP3 K 21 en ll C41 H 22 FB41 1 4 RP4 M 21 o m C42 J 1 9 FB42 M 4 SW1 0 28 C43 G 22 FB43 L 4 SW2 F 2B C44 F 24 FB44 L 4 UI G 1 5 C45 J 10 FB45 K 4 U2 G 21 C46 J 12 FB46 0 4 U3 G 26 C47 J 14 FB47 J 4...

Страница 17: ...ec t CAS Col umn Address Strobe CST RD Cassette Read CST MTR Cassette Motor CST SENSE Cassette Sensor CST WRT Cassette Write eso CS1 Chip Select Lines 00 Thru 07 Data Lines EXT AUDIO External Audio FUNCTION HI Function High Line FUNCTION LOW Function Low Line IRQ Interrupt Request KO Thru K7 Keyboard Matrix Line KERN KERNAl CSt Kernal Chip Select KEYPORT CS Key Pori Chip Selecl MUX Multiplex R W R...

Страница 18: ...re 1 32V 5ms OV VIDEO Check for video waveforms on pi ns 13 and 23 of the TED IC U1 If waveforms are missing check IC Ul by substitution If the waveforms are present check for video waveforms on pins 6 7 and 8 of the RF Modulator Ml If waveforms are missing check Modulator M1 by substitution If the wave forms are present at Modulator M1 check the Video Output Connector CN7 for bad connections COLO...

Страница 19: ...945 GE 2 12 WSA18 NTE85 ECGB5 SK3124Ai289A WEP736 123A 121 972 03 2SC18 15 902693 01 GE 62 W SA05 NTE85 ECGB5 SK3 124Ai289A WEP66 199 12 1 Z9065 Q4 TI P29 902653 01 GE 66A TI P298 NTE152 ECG152 SK3893 152 WEP745 152 12 1 987 03 2SD880 902694 01 GE 66A TI P4 1A NTE152 ECGI52 SK3440 291 WEP745 152 12 1 987 03 Ul S8360Rl 7360R7 251535 01 U2 SB501Rl 7501Rl 25 1536 01 U3 S6551CBM 6551A 90 1895 02 U4 S8...

Страница 20: ... M lS65298 25 16 40 03 For SAFE TY use onl y equi va le nt rep lacement part L ead conf igurati on may vary from ori ginal 1 Number on uni t 2 Used In United Kingdom and Germany WIRING DATA PHILIPS NEW TONE MOTOROLA NTE ECG PART No PART No PART No SN74LS I 39N NTE74LS 139 ECG74LS I 39 SN74LS175N NTE74LS175 ECG74LS175 SN74LS27N NTE74LS27 ECG74LS27 8401 or 842 1 Si ng le Conduct or 8208 Two Conducto...

Страница 21: ...ains four 68 5 COILS RF IF ITEM FUNCTION MFGR No PART No ITEM FUNCTION MfGR No PART No Ll F ilter EM I 251264 01 L3 RF Choke 1 2uH 90 11 52 0 1 L2 L1 ne Choke 906127 0 1 L4 RF Choke 1 2uH 901152 01 FUSE DEVICES MFGR ITEM PART NO NOTES DESCRIPTION NO DEVICE HOLDER Fl 1 5A 250V 903556 1 8 906102 0 1 Fast Act ing MISCELLANEOUS ITEM PART NAME MFGR NOTES No PART No FBI Ferrite Bead 903025 01 thru FB65 ...

Страница 22: ...P P P 14 P H H P P P 15 P L L P 16 P H H L 17 P 18 P 19 P 20 H NOTE Logic probe readings taken with computer turned On no keys pressed unless otherwise noted Logic Probe Display L Low H High P Pulse Open No light On PI N Ie NO U2 21 P 22 P 23 P 24 H 25 H 26 27 H 28 L 29 L 30 L 31 P 32 P 33 P 34 P 35 P 36 P 37 P 38 P 39 P 40 H Ie Ie U12 U13 P P P P P P P P P P P P H H P P P P P P P P P P P P P P L ...

Страница 23: ... NO U23 NO U23 NO U24 NO U24 1 15 P 1 15 P 2 P 16 P 2 P 16 P 3 P 17 P 3 P 17 P 4 P 16 P 4 P 16 P 5 P 19 P 5 P 19 P 6 P 20 L 6 P 20 L 7 P 21 P 7 P 21 P 6 P 22 H 6 P 22 P 9 P 23 P 9 P 23 P 10 P 24 P 10 P 24 P 11 P 25 P 11 P 25 P 12 P 26 P 12 P 26 P 13 P 27 H 13 P 27 H 14 L 2B H 14 L 2B H PIN IC PIN IC NO U27 NO U27 1 P 11 P 2 P 12 P 3 P 13 P 4 P 14 P 5 P 15 P 6 P 16 P 7 P 17 P 6 L 16 P 9 P 19 P 10 L...

Страница 24: ...Page 15 See Page 6 Page 16 See Page 5 Page 17 See Page 4 Page 18 See Page 3 ...

Страница 25: ...sured when necessary Each waveform is 7 em width with DC reference voltage given at the bottom line of each wave form Time in ILsec per em given with p p reading at the end of each waveform Item numbers in rectangles appear in the alignment ad justment instructions Supply voltages maintained as shown at input Voltages measured with digital meter no signal Controls adjusted for normal operation Ter...

Страница 26: ...rogram type SAVE press the RETURN key and fol low the instructions displayed on the screen DISK OPERATION Connect Disk Drive unit to the Serial 1 0 Connector CN2 located at the rear of the Computer Carefully insert the diskette so that the label on the diskette is facing up and the notch on the diskette is on the left side Once the diskette has been inserted close the protective gate by pushing do...

Страница 27: ...ith power On 8 Do not use freon propelled sprays These can generate electrical charges sufficient to damage semiconductor devices 9 The Computer cabinet is equipped with vents to prevent heat build up Never block cover or obstruct these vents 10 Instructions should be given especially to children that objects should not be dropped or pushed Into the vents of the cabinet This could cause shock or e...

Страница 28: ...ective circuitry and components LOGIC PIN IC PIN IC PI N IC IC IC IC IC IC IC IC NO Ul00 NO UI OO NO Ul 02 Ul 03 Ul04 Ul05 Ul06 Ul07 UI 08 Ul09 1 P 21 P 1 L L L L L L L L 2 P 22 P 2 P P P P P P P P 3 P 23 P 3 H H H H H H H H Quick Comp onent Location using the SAMS exclusive GRIDTRACE ORCUITRACE and component photographs c _ I a4 C C iii JII C I 4 I 5 I 6 I 7 __ J a t5 1II J I H SflL 4IK 110 111 1...

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