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Содержание 26-3134

Страница 1: ...CC15 08970 COMPUTER RADIO SHACK TRS 80 COLOR COMPUTER 2 MODELS 26 3134 26 3136 TECHNICAL SERVICE DATA FOR YOUR COMPUTER ...

Страница 2: ...578 IC MC6821P IC3 MX6202 IC SC77526P IC5 AMX4227 IC SN74LS273P IC7 MX6211 IC SC67331P IC8 AMX4575 IC MC6847P IC9 MX5560 IC MC6809EP IC11 AMX4583 IC SN74LS138N IC13 MX6200 IC 804236 IC14 MX6199 IC RAM MB8118 12P thru IC21 IC22 MX6198 IC 74LS783 Q1 2SD526 Transistor R2 N0001EGE Resistor 1 ohm 1W RY1 AR8166 Relay SW1 AS2900 Switch Power T1 ATA1056 Transformer Power SAMS Howard W Sams Co 4300 West 62...

Страница 3: ... SA e SOUND RF MODULATOR 3A 4B CHANNEL 4 S CHANNEL 3 120MC R2 OB s ov source IC1 IS 6a SALT o PULSES IC7 PI A C6A 6D PULSES g 4 7 8 9 IC2 P1A KEYBOARD 3 g 2 o w r o 05 7 M O 9 O 55 w O 35 K O P O c H m 33 INTERCONNECTING DIAGRAM II INTERCONNECTING DIAGRAM VIS ...

Страница 4: ...bstitution COLOR A No color Check for 3 579MHz at pin 7 of SAM IC IC22 If the 3 579MHz signal is missing check 1C22 by substitution B If the 3 579MHz signal is present at pin 7 of IC22 check the RF Modulator by substitution C Colors are not correct Check for a frequency of 3 579MHz at pin 7 of SAM IC IC22 If the fre quency is not correct check the adjustment of Clock Trimer TC1 see Miscellaneous A...

Страница 5: ... SERVICE CHECKS Continued 7D CLOCK 4C TC1 PINS 34 AMD 35 PULSES C3 PSMS 24 THRU 31 PULSES PULSES 1 PIN 11 ICT1 PIN 7 2A 579MHz lp C22 J 4A 2A 33 g s o O OT Q I m r1 O to t K O 9 O 5 2 33 W O a o w S w 2 _l m 3D IV ...

Страница 6: ... SERVICE CHECKS Continued 7D CLOCK 4C TC1 PINS 34 AMD 35 PULSES C3 PSMS 24 THRU 31 PULSES PULSES 1 PIN 11 ICT1 PIN 7 2A 579MHz lp C22 J 4A 2A 33 g s o O OT Q I m r1 O to t K O 9 O 5 2 33 W O a o w S w 2 _l m 3D IV ...

Страница 7: ... the cable into the Earphone jack the large gray plug into the Auxiliary jack and the small gray plug into the Remote On Off jack on the Recorder To load a program from cassette put the Recorder in Play mode with the volume turned about half way up Type CLOAD and then press the Return key The letter S will ap pear on the Monitor screen while the Computer searches for the program When the Computer ...

Страница 8: ... SA e SOUND RF MODULATOR 3A 4B CHANNEL 4 S CHANNEL 3 120MC R2 OB s ov source IC1 IS 6a SALT o PULSES IC7 PI A C6A 6D PULSES g 4 7 8 9 IC2 P1A KEYBOARD 3 g 2 o w r o 05 7 M O 9 O 55 w O 35 K O P O c H m 33 INTERCONNECTING DIAGRAM II INTERCONNECTING DIAGRAM VIS ...

Страница 9: ...ccessible connectors and contacts DISK DRIVES Clean the read write heads of the Disk Drives about once a month or after 100 hours usage Use only an approved head cleaning kit Handle carefully to preserve proper disk head alignment A sudden bump or jolt to the Disk Drives can knock the disk head out of alignment If the disk drive must be transported place an old disk in slot and close door during t...

Страница 10: ...os o l 5 o 30 CO o o s W T O c H m 33 NS SAMS Howard W Sams Co im 4300 West 62nd Street P O Box 7092 Indianapolis Indiana 46206 U S A The listing of any available replacement part herein does not constitute in any case a recommendation warranty or guaranty by Howard W Sams Co Inc as to the quality and suitability of such replacement part The numbers of these parts have been compiled from informati...

Страница 11: ...A PHOTOFACT STANDARD NOTATION SCHEMATIC w THHEBffiQEBl Howard W Sams Co Inc 1886 RADIO SHACK COLOR COMPUTER MODELS 26 3134 26 3136 ...

Страница 12: ...P VIEW 1C3 D18ITAL TO ANAL06 CONVERTER CMC TOP VIEW SS5D 1 41 VCC 8 2 TRI66ER D15CHM8E 7 3 OUTPUT THRESHOLD 6 4 RESET CONTROL V0LTA6E 5 C4 T1HER TOP VIEW 1 vss DD7 2 DOS CSS 3 DM IB 4 DD1 5 5 BD2 RP 6 003 A S 7 DD4 A S 8 ODS CLK 9 H8 1HV 10 t IW EXT 11 A OHO 12 w an 13 DAS Y 14 DAB o IS DA7 DA4 IS 0A8 DA3 17 WO BA2 18 DAS 0 1 18 DA10 0 0 20 Mil mn SN74LS244N IC8 VDG TOP VIEW 8040517 t NC SNO 2 D I...

Страница 13: ...A PHOTOFACT STANDARD NOTATION SCHEMATIC with HBatm fwa Howard W Sams Co Inc 1906 21 ...

Страница 14: ...f x f j C21 IC17 IC20 3M S8M1K pi 1 Us f m iBlll 4HBI111111IIC llillf vl iAJ iPtafiiiaSi feaifetttir i ee siii IBS a ll3H ll7 n i tMf lJ If fi HI h t I r If P at la KmH Ii IC18 IC15 IC16 IC14 IC16 IC14 o o 3J s 5 m r O Cfl 9 o r w O 3 N O o o 2 S 2 o c i m 33 5 0V A Howard W S0m HEHfflfiTOl Photo 20 NOTE ARROWS ON IC S INDICATE PIN 1 UNLESS NOTED ...

Страница 15: ...e SB wl R mmMi gam j jtjjtifcjjjpJg all iii HP I m SBV V I l 4 mm Pi BIB Us i 1 MW0t P s mm m It 1 fc 2 I 3 4 I 5 f I f A HowordW Sams EEHfflffl Photo 3 9 Uw f lflP 1 mfc MP WE 1 W w HI I 1 74 J 7S 4 1 I E TT I 3 g o O i 2 p o o o S3 a 5 W n H m 19 ...

Страница 16: ...R8 C48 E 24 R9 C50 T 24 R10 C51 0 23 R1 1 C52 T 23 R13 C53 0 21 R14 C54 T 22 R15 C55 0 20 R16 C56 T 19 R17 C57 T 18 R18 C58 C 23 R19 C59 D 8 R20 C61 H 7 R21 C62 H 7 R22 C63 T 24 R23 C64 T 22 R24 C65 T 18 R25 C66 F 2 R26 CN1 H 26 R27 CN2 L 10 R28 D1 K 4 R29 D2 K 3 R30 D3 1 2 R31 D4 1 2 R32 D5 p 4 R33 D6 P 4 RY1 D7 E 15 SW1 D8 E 14 SW2 D9 D 18 SW3 D 22 D 24 D 23 C 10 G 2 G 3 N 18 L 15 S 14 0 3 0 19 ...

Страница 17: ...lso check for other shorted components that may be overloading the power supply If the voltage across R2 is approximately 1 0V check Resistor R2 for an open condi tion If the voltage across R2 is less than 0 2V check Tran sistor Q1 and IC1 If voltage at the collector of Q1 is less than 7 5V check for approximately 17 5VAC between the anodes of D3 and D4 If the voltage is missing check Power Switch...

Страница 18: ...e A and Phase B waveforms at pins 10 and 11 of the Video Display Generator IC8 If either waveform is missing check IC8 Also check the CH B out put at pin 9 of IC8 The CH B output should be a steady DC value in the range of 0 5V to 2 0V If the CH B output is missing check IC8 If IC8 is good check for a possible bad modulator that may be loading the chroma signals from IC8 If color is missing in the...

Страница 19: ...f SALT IC IC1 If the voltage is not correct at pin 9 of IC1 check IC1 Relay RY1 and Diode D9 TROUBLESHOOTING Continued Programs cannot be saved to cassette Type in and run the following basic program This program continuously saves itself to the cassette 10 CSAVE GOTO 10 While the program is running use a scope to check for pulses at pin 17 of DAC IC IC3 If pulses are present check Connector JK4 I...

Страница 20: ... CO to to to to Q d r r r t LU 3 Z CM CM CM CM tr c r i r r 1 t S S SS 00 oo oo cn L i EC iDiDlfllOOO o o o o o On On On On CM CM CM CM in in in in 1 _l J 1 in oo oo o o o o o O O co oo oo oo in in in in 3 M a in tn in in in in in r m in 8888 ON ON ON ON r r r r O CD O CD O CD O CD CD CD O o O CD O CD CD CD p CD CD OCD OOO O OO O OOO O O O OO oooo OOOO OOOO UJ UJ LU UJ UJ LU LU LU LU LU LU UJ LU L...

Страница 21: ...o O O o O o o o o LU LU UJ LU LU LU LU LU LU LU LU LU LU LU LU LU 9 CO 00 00 00 d a a CM CM CM CM KN KN KN KN ill CM CM CM CM LU LU LU LU O O O O CO CO CO CO 0N ON ON ON CO CO CO CO CO CO CO CO 1 t I r i f o o o o J 1 1 _J _J _l _l z CC a 00 CD 00 CD 3 t f Bqf J lE f r r t r NO D NO NO r r i r r r r r Ql LU LU LU LU l_ l_ l_ l_ Z Z Z Z LU LU LU LU h 1 1 1 LU LU LU LU h l l i Z Z Z 2 LU LU LU LU 1 ...

Страница 22: ... in in in in in in in X 00 00 CO o_ LU LU LU LU LU LU LU LU j _ 1 1 1 O z z z z z z z z k_ o co 22 LU 55 O c z 0 l_ c 0 E 0 d o cE z JjO I 3 L oc Q 1 0 CL Imk oo NO no in ON CM KN rl u in in on no Q oo X CO CO CO s CM CM CM Q CO li cc Lu z _ 2 oeujiL 3 o 1 i_ d z 00 CL MOino 00 w XZ o CO CO CO K1 m mooflfl iDiOin 1 _j i r oo od a oo co r m in sr co co co co co co fn m in in On 3 i 1 I no no z too ...

Страница 23: ...ANSFORMERS Sweep Circuits ITEM No FUNCTION MFGR PART No OTHER IDENTIFICATION NOTES T2 LI Power RF Choke IOOuH ATA 1056 ACA8339 MISCELLANEOUS ITEM PART NAME MFGR NOTES No PART No FB1 Ferri te Bead Thru FB4 RY1 Relay AR8166 Cassette SI Switch Key Thru S53 SW1 Switch AS 2900 Power SW2 Sw i ten AS2849 Reset SW3 Switch AS2847 Channel XI Crystal MX1112 14 31818MHz Foot AHC2450 RUSSELL Industries 4 Requi...

Страница 24: ...8 H 18 P P 18 P 38 P 19 19 L 39 L 19 P P 19 L 39 L 20 20 H 40 H 20 H H H 20 H 40 P PIN IC PIN IC PIN IC PIN IC PIN IC IC PIN IC PIN IC NO IC8 NO IC8 NO IC9 NO IC9 NO IC10 1 C1 NO IC12 NO IC12 1 L 21 P 1 L 21 P 1 P P 1 P 13 P 2 P 22 P 2 H 22 P 2 P P 2 P 14 P 3 P 23 P 3 P 23 P 3 P P 3 P 15 P 4 P 24 P 4 24 P 4 H P 4 P 16 P 5 P 25 P 5 P 25 P 5 L P 5 P 17 P 6 P 26 P 6 L 26 P 6 L H 6 P 18 P 7 P 27 L 7 H...

Страница 25: ...P 10 P P P P P P P P 11 P 23 P 11 P P P P P P P P 12 L 24 H 12 P P P P P P P P 13 13 P P P P P P P P 14 14 P P P P P P P P 15 15 P P P P P P P P 16 16 L L L L L L L L PIN IC PIN IC NO 22 NO 22 1 P 21 P 2 P 22 P 3 P 23 P 4 P 24 P 5 P 25 P 6 P 26 P 7 P 27 P 8 P 28 P 9 P 29 P 10 P 30 P 11 P 31 P 12 P 32 P 13 P 33 P 14 P 34 P 15 P 35 P 16 P 36 P 17 P 37 P 18 P 38 P 19 P 39 P 20 L 40 H Logic Probe Disp...

Страница 26: ...uest JOY THRU JOY 3 Joystick Inputs MAO THRU MA7 Memory Address MDO THRU MD7 Memory Data NMI Nonmaskable Interrupt 3D PIAO Peripheral Interface Adapter Zero g PIA1 Peripheral Interface Adapter One Q Clock 1 16 Master Clock O 2 en Leads E Clock by Ninety Degrees o x R W Read Write O RAS Row Address Strobe j2 O RESET Reset RSOUT1 Transistor Transistor Logic Input So for RS232C Output p RS232 RS232 I...

Страница 27: ...remove or install board floppy disk drives printers or other peripherals with power On Do not use freon propelled sprays These can generate electrical charges sufficient to damage semiconductor devices 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 dropp...

Страница 28: ...e SB wl R mmMi gam j jtjjtifcjjjpJg all iii HP I m SBV V I l 4 mm Pi BIB Us i 1 MW0t P s mm m It 1 fc 2 I 3 4 I 5 f I f A HowordW Sams EEHfflffl Photo 3 9 Uw f lflP 1 mfc MP WE 1 W w HI I 1 74 J 7S 4 1 I E TT I 3 g o O i 2 p o o o S3 a 5 W n H m 19 ...

Страница 29: ...f x f j C21 IC17 IC20 3M S8M1K pi 1 Us f m iBlll 4HBI111111IIC llillf vl iAJ iPtafiiiaSi feaifetttir i ee siii IBS a ll3H ll7 n i tMf lJ If fi HI h t I r If P at la KmH Ii IC18 IC15 IC16 IC14 IC16 IC14 o o 3J s 5 m r O Cfl 9 o r w O 3 N O o o 2 S 2 o c i m 33 5 0V A Howard W S0m HEHfflfiTOl Photo 20 NOTE ARROWS ON IC S INDICATE PIN 1 UNLESS NOTED ...

Страница 30: ...A PHOTOFACT STANDARD NOTATION SCHEMATIC with HBatm fwa Howard W Sams Co Inc 1906 21 ...

Страница 31: ...P VIEW 1C3 D18ITAL TO ANAL06 CONVERTER CMC TOP VIEW SS5D 1 41 VCC 8 2 TRI66ER D15CHM8E 7 3 OUTPUT THRESHOLD 6 4 RESET CONTROL V0LTA6E 5 C4 T1HER TOP VIEW 1 vss DD7 2 DOS CSS 3 DM IB 4 DD1 5 5 BD2 RP 6 003 A S 7 DD4 A S 8 ODS CLK 9 H8 1HV 10 t IW EXT 11 A OHO 12 w an 13 DAS Y 14 DAB o IS DA7 DA4 IS 0A8 DA3 17 WO BA2 18 DAS 0 1 18 DA10 0 0 20 Mil mn SN74LS244N IC8 VDG TOP VIEW 8040517 t NC SNO 2 D I...

Страница 32: ...hen necessary Each waveform is 7 cm width with DC reference voltage given at the bottom line of each wave form Time in ftsec per cm 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 Terminal i...

Страница 33: ...8 d 1 JE S UJ z e s tn f t o e j U l Q _j a u a UJ BLOCK DIAGRAM 24 ...

Страница 34: ...ds the program the let ter F will appear on the screen and the word OK will appear after the program has been loaded To save a program to cassette put the Recorder in the Record mode Type CSAVE and then press the Return key The word OK will appear on the Monitor screen after the pro gram has been saved and the Recorder will shut Off POWER UP The Computer will come up in Basic mode when turned On w...

Страница 35: ...o o j on oo I 00 CM CO a CO D oo to o CM 1 to ffi 5 cp ca OJ T3 6 en O C TO O Q J E cd ca r w CO c O CD CO 5 O W if o 09 O CO O c CD CD en u S U O P c E S 2 5 m u 3 C Q O el E lC OC o i u CD en _ D a a o U a c D O EQ c o Ed o 2 D c crt O a O o C T3 in u CR CD in d Si c E 41 o o 4 CO 4 0 XI o Ol D C 0 u J n c o u in c D C u u C l T3 a 1 o E c r ID c en 01 Cl S x Hi c o u en E CD V 01 3 COl D S o a ...

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