Commodore A 2286 User Manual Download

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Summary of Contents for A 2286

Page 1: ...Commodore A 2286 AT Emulator Card Service Manual 1 89 Commodore...

Page 2: ...Emulator Card TABLE OF CONTENTS Specifications 11 2 Installing Bridgeboard 11 3 Jumper Location 11 4 SoIder Jumper 11 6 Spare Parts List 11 8 Schematics Main 11 20 Schematics Baby 11 33 5 25 Drive 11...

Page 3: ...ompatible emulated on Amiga parallel port Slots 1 IBM PC AT 2 IBM PC compatible full size slots Keyboard AT keyboard emulated on the Amiga keyboard Video Display IBM PC monochrome text mode and color...

Page 4: ...uide and reconnect any equipment you may have disconnect Where the Bridgeboard Goes The Bridgeboard plugs into the internal expansion slot area located at the left of the A2000 There are five slots on...

Page 5: ...l l l l l l l l l _ _ I I I I I I I I I I I _ _ l l l I I I I I I I I I I I I K I I I I I I I I L II G m en V omead OOOE9J Z f Z8208 m 98208 89H Z 9 f l 19V iaa i r ja B e d s zr e 3 r ynx g ujei joie...

Page 6: ...5 Function enable disable 384K above memory Position baby board above memory enabled above memory disabled J6 Function floppy disk select Position baby board P S 2 type 1 44 Mbyte AT type 1 2 1 44 J7...

Page 7: ...to CAS delay is 50 ns default JS2B closed JS2A open RAS to CAS delay is 75 ns JS4A JS4B Function Onboard or external 16MHz Oscillator select Position baby board JS4A closed JS4B open selects 16 MHz fo...

Page 8: ...S9 Function real time clock standby mode Position baby board JS9 closed standby mode default JS9 must be closed JS10A JS10B Function real time clock bus timing select Position baby board JS10A closed...

Page 9: ...A T E A P P R O V E D A D A Jd E N Q W E3fUG RELEASE 1 48 3 j h f crS 1 S H E E T O F S IZ E A S S Y D W G N O T E S 1S83 CCMMGEGRE AI IGA INC I nformation ccntained H E R E IN IS T H E unpusushed an...

Page 10: ...X O X C k M X K X k c m O l i 0 L 0 0 8 E 0 e r U l C D 2 D Z h X 0 1 X e x k X Q M i m 1 O l V X Q i X X k l V M k i v o C M X C i c o V v o o C M Q O f i u l C M X v n C M C N J X M X 1 l C X X X r...

Page 11: ......

Page 12: ...m ODORE AMIGA INC INFORMATION CONTAINEO HEREIN IS THE UNPUBUSHED ANO CONFIOENTIAL PROPERTY OF COMMCDORE AMIGA INC USE REPROCUCTION OR OISCLOSURE OF THIS INFORMATION WITHOUT THE PRIOR DRITTEN PERMISSI...

Page 13: ...AL 1 1 15 380658 0 1 IC ADDRESS BUS TRANSLATER U68 5 16 380230 0 3 IC ALS245 U15 U17 U20 U22 U24 2 17 380230 0 4 IC ALS573 U14 U16 3 18 380230 0 5 IC ALS646 Ul 2 Ul 3 Ul 9 1 19 380695 0 1 IC DATA BUS...

Page 14: ...01550 1 0 5 RESISTOR CARBON FILM 33 OHM R10 2 55 901550 9 4 RESISTOR CARBON FILM 68 OHM R2 R27 56 57 CAPACITORS 18 58 900022 0 1 CAPACITOR 22uF C1 C6 C9 CIO C23 C59 C62 C65 C67 C68 C I01 21 59 900020...

Page 15: ...0 0 6 IC SOCKET 40 PIN DIL U2 4 78 3 90185 0 1 IC SOCKET 84 PIN PLCC U3 U4 U67 LF68 3 79 904150 0 8 IC SOCKET 20 PIN DIL U10 U21 U23 2 80 904150 0 4 IC SOCKET 24 PIN DIL U5 U6 81 1 82 38 03 33 0 1 JUM...

Page 16: ...SCREEN 4 3 V 2 1 REVIS10NS ZONE LTR DESCMPTION DATE APPROVED S E E S H E E T _1_ I 4JNLESS O T H rPW I1 S L C in r p TOLCBANCCS ON o c c p m a l s y Jt XX r 1 I X 5 1 yL X M A T t N I A L 1RAM N Bl US...

Page 17: ...ION CONTAINED HEREIN IS THE UNPU0USHED AND CONFIDENTIAL PROPERTY OF COMMODORE AMIGA INC USE REPRODUCTION OR DISCLOSURE OF THIS INFORMATION W1THOUT THE PRIOR WRITTEN PERMISSION OF COMMODORE IS STRICTLY...

Page 18: ...0 U32 16 390 Z0 0Z IC B04 U46 17 390092 03 IC F08 U47 18 39008 0 IC P74 U48 2 19 380280 03 IC F Z 58 U25 U26 20 380280 04 IC F280 U27 U28 21 390322 0 IC LM fO CN DIL U54 22 390305 0 IC M Cf468f A U52...

Page 19: ...2 2 OK OHM B 32 I 50 I 2 51 900850 01 BJOBF 1N4148 B1 B2 n I 1 52 324220 02 TBANSJSTOB BC237B T3 53 324220 03 TB4NSJST0B BC307 T2 54 55 380678 01 J C DFLAY U N F 125 ns 5 TABS U31 3 56 902 50 05 JC SO...

Page 20: ...Chapter11...

Page 21: ...E_6 DWG DATA BUS LATCHES BUFFER ATE_68 DHG 128K DUAL PORTED RAM ATE_69 DMG ABDRESS BUS TRANSLATOR ATE_bl0 DHG DATA BUS TRANSLATOR ATE_611 DMG COHN TO PC AT A2888 BUS ATE_612 DMG CONNECTORS TO BABY BOA...

Page 22: ...Chapter11 18 HHz UERSIOH 6 OR 18 MHz MERSXOH c o R i m o d o r e b s w DF ft WH E V H ULLRIJCH T I T L E SCHEKATIC AT BRIDGEBOARD A F R0 UE D M F T i P M C TT I r 11 20...

Page 23: ...C hapterll 11 21...

Page 24: ...a m C S ZS 1 6 7 IRQ SC123 7 V I 0R 3 6 f f v i T R r r BMATfEMRCSf y r i E m u s 6 f C U m C U X X C U X C U C O H r i 3 X L U L U x P X w i L U L U X X X X X X P X X C X C O X P V RESET 5 1 2 3 ALE...

Page 25: ...Chapter 11 11 23...

Page 26: ...Chapter 11 11 24...

Page 27: ...Chapter 11 11 25...

Page 28: ...4 JG2 41 46 4 14 14 13 13 12 12 1 1 1 1 O o 7 6 6 16 10 4 4 16 16 c 1 1 RA8 Rh I RA2 Rh 3 RA4 RAE RAb RA UE CAS RAS OE DO D l D2 D3 12 13 15 1 14 15 US4 41 4 6 4 RAO 1 4 14 RA8 RAI 13 13 RAI RA2 12 1...

Page 29: ...E D A T h 1 0 CHRE F DC C S KR W MRES MUDS T uT ds F C P C S I R Q 3 I R Q 1 4M I O R C I Q WC KE KR KE KW AEN D C K 0 L OC K REGEN ADDRESS BUS TRANSLATOR U68 USS 1 2 2 4 8 6 4 UI i 4 2 3 4 1 0 i C 4...

Page 30: ...i Mh 0 2 Mh 0 3 MAQ4 MA0 5 MA06 MAIS MAI MAIS MAIS MA2 9 MA21 MA2 2 MA23 USS U3 3D 2 2 4 1 8 4 7 7 1 4 4 coTTfT en c n f T i n CONF Q T m u MUDS MAS SLAUE 3 Z i N C O Q _ Li jl r co co C D il ll I Li...

Page 31: ..._ ZE RO US 3 1 2 3 8 X o 2 3 9 7 T 4 2 4 I E Q 3 7 9 f ______ a v tr 2 fr 4 9 1 2 j 2 4 29 5 j 1 9 4 I i I 4 a 1 6 3 I 7 21 23 4 1 0 C C5 1 2 90 38 1 4 17 RESET C2 5 1 2 3 3 L _______ ___ 2 31 fe 0 i...

Page 32: ...H K E 3 113 13 1 Z IO R l 2 5 6 7 3 1 0 113 I CHRBV l 3 3 113 Z 14 1 0 T SVSCLK E5 7 9 113 1 AEHC5 7 3 1 8 1 1 3 2 0 1 1 Z T C L 5 U _ 13 7 1 2 1 B H L E E 5 i n 18 t 9 0 1 H C Ti nri SA TV r 4 4 1 _...

Page 33: ...5U i __ i _ sb 22uF 1 C62 22u F i __ u b y 2 2 u F 1 CS4 7 2 2uF 1 CSS 1 CS7 2 2 u F 1 CSS 22u F X v 5U 1 C7 8 1u F 1 03 0 l u F 1 Cli 8 l u F 1 C1 2 8 l u F 1 C13 0 luF 1 C14 0 1u F 1 CIS 8 luF 1C1 6...

Page 34: ...BTE_72 DKG BTE_ 73 BMG BTE_ 74 B7G BT _75 r MG BTE_ S B iG BTE_77 BMG CONTENTS IHI s SHEET i h b mm BIOS EFROHS PftP ITY LOGIC TBC DECODING LOGIC ETC TEYBOARB CONTROLLER COr HECTOEi BLOCK CATS S 1903...

Page 35: ...Chapter11 11 33...

Page 36: ...RBWRC43 RASEN 43 z FISTS BD 3 iS C4 J EBNE C4 S 3 k 18 lb 1 4 lb i S 18 AL S2 45 1 A l ft 2 T A4 i2 A3 T A3 r o r i A7 C A3 T P U2 3 2A k T b j IK 54 fiSLJ V Ti 13 3 14 1 i j 1 w 1 5 t 12 1 H 7 10 V V...

Page 37: ...Chapter11 11 35...

Page 38: ...Ud BBi BBS DB BBS DBS DB7 v y 58 51 N C X 34 2 2 23 N C 24 N C 35 3 b N C 37 C 12 0 A 13 i 14 2 15 2 i f 16 4 17 q 18 r iS 14383 8 US 3 3 14863 U S 3 4 R i 2 1436S CS 4 8 lu F 14 C30 6 18uF TANTAL 2M...

Page 39: ...3 r 4y E8 f C N C l i C N C M li C N C RAMCS 3 43 F 1b L3 3 LuWfiEb C43 SETSDC53 1 A20GTL E 3 i KBD I NT l 53 S P26CE2 S l P27C53 a IR y b 3 EDATA 8 7 LSI F L O P P Y D R I V E S CA B NORMAL HI SH DEN...

Page 40: ...7 22u F 7 22uF 22u F 22uF 7 22u F 2 2 2 i 2 4 2 2 2 2 i V C45 22uF i 1 i V i f K 1 i i i l es2 CSS CSS C57 CSS C71 C72 Ci 88 _ 7 22115 7 22u F 7 22uF 7 22u F 7 22u F 722u F 7 22uF 7 22u F 2 2 2 2 2 2...

Page 41: ...n tro l c irc u its high p e rfo r m a nce and lo w p o w e r c o n s u m p tio n are achieved In s ta n d b y m ode p o w e r c o n s u m p tio n is o n ly 1 59W an d in O peration m ode 3 81 W m a k...

Page 42: ...512 B 128 B 256 B Recording density 4935 BPI 9870 BPI 2961 BPI 5922 BPI Rate of data transfer 250K BPS 500K BPS 125K 150K BPS 250K 300K BPS Access time Power on to ready time 0 5 sec or less Single tr...

Page 43: ...ption Write 330 mA TYP 210 mA TYP 4 17 W TYP Seek 260 mA TYP 440 mA TYP 6 58 W TYP Spindle Motor Starting current 0 5 sec max 900 mA MAX Ripple voltage allowance DC 12 V Less than 150 mVp p including...

Page 44: ...n 5 90 RH No dew condensation D ring storage 8 90 RH No dew condensation Environment conditions Temperature change 15 C H Vibration D ring Operation Continuous Vibration Amplitude Less than 0 5 mm 5 2...

Page 45: ...149 0 5 ChapterU 4 DIMENSIONS 474 05 792 0 5 i 5 I S 11 43 146 0 5 _______ 21 8 0 5...

Page 46: ...ecuted when no disk is loaded This Signal operates independently of the DRIVE SELECT Signals 3 DIRECTION SELECT Signal line This Signal determines the direction of movement of the head when a pulse is...

Page 47: ...h e n th e d isk is inserted 2 TRACK 00 signal line W h e n th is signal line is set to lo w level th e head is lo ca te d a t th e tra c k 00 P o sitio n and th e s p e cific phase o f th e ste p p...

Page 48: ...DRIVE SIDE MODE SELECT 2 IN USE HEAD LOAD 4 DRIVE SELECT 3 8 INDEX 6 DRIVE SELECT 0 10 DRIVE SELECT 1 12 DRIVE SELECT 2 14 MOTOR ON 16 directio n SELECT 18 STEP 20 WR1TE DATA 22 WRITE GATE 24 26 TRAC...

Page 49: ...Chapter11 5 6 Signal Tinning 1 Initialize sequence The drive requires a power on sequence delay of 600 ms DRIVE SELECT is ignored during this delay time 11 47...

Page 50: ...DIRECTION SELECT TRACK 00 t 1 s min 3 Read timing DRIVE SELECT STEP WRITE GATE SIDE SELECT VALID READ DATA 1 S mm 18ms min 1 s mm 100 s min 28ms max 1us min 600 min a 1ms mm b S iS max a J Jm s max b...

Page 51: ...iS nom a 2 S nom a 6 iS nom b 4 u snom b READ DATA MFM recording C Clock D Data a 1 6MB mode b 1MB 300 rpm mode 5 Write timing MOTOR ON DRIVE SELECT STEP WRITE GATE SIDE SELECT WRITE DATA 700ms mm 18...

Page 52: ...a Qfis 40ns b WRITE DATA FM recording M M J WRITE DATA MFM recording C D C A s 20ns a 8 S 40ns b 3 S 15ns a 6fjs 30ns b 2 s 10ns a 4 iS 20ns b C Clock D Data a 1 6MB mode b 1MB 300 rpm mode 7 INDEX ti...

Page 53: ...Chapter 11 6 POWER ON SEQUENCE Recalibration of the head position is performed during the power on sequence of the FDD Fig 6 1 shows the power on sequence 600ms max Fig 6 1 Power On Sequence...

Page 54: ...90 of the specified value should be set to 100 ms or less 2 If th e d rive is in a Status o th e r th a n w rite O peration and th e DC p o w e r is d isco n n e cte d th e d isk and th e da ta sto re...

Page 55: ...DEX 7 GND 10 DRIVE SELECT 0 9 GND 12 DRIVE SELECT 1 11 GND 14 DRIVE SELECT 2 13 GND 16 MOTOR ON 15 GND 18 DIRECTION SELECT 17 GND 20 STEP 19 GND 22 WRITE DATA 21 GND 24 WRITE GATE 23 GND 26 TRACK 00 2...

Page 56: ...rpm IBM PC AT compa tible Pin 2 as change over input Pin 2 High 1 6 MB 360 rpm Low 1 MB 360 rpm o o o o o 1 6 MB 360 rpm non switchable Disregards pin 2 Signal O 0 o o _ _ o 12 READY 1 T h e s h o rt...

Page 57: ...t Pin 2 High 1 6 MB 360 rpm Low 1 MB 360 rpm o o o o o Mode 4 1 6 MB 360 rpm non switchable Disregards pin 2 signal o o o o _ _ o 12 READY Table 105 13 DISK CHANGE 0 Position closed _ p osjtj0n open 1...

Page 58: ...ensor output Signal is taken out before flowing across the Schmitt inverter Here it is necessary to check that the output voltage of the index sensor is normal with no waveform split 4 TP6 write prote...

Page 59: ...riodic Maintenance 1 3 1 Cleaning of Magnetic Head by Cleaning Disk When using the FDD in a dusty location it is advisable to clean the magnetic head with a cleaning disk at regul r intervals When the...

Page 60: ...ure occurs in several disks 4 Whether the FDD is operated under appropriate environmental conditions For example check whether the location is exceedingly noisy or has an extremely strong magnetic fie...

Page 61: ...m 3 7 5 Check the index sensor output pulse waveform and the pulse interval disk rotating speed at TP5 If abnormal check them see item 3 3 6 Carry out check and adjustment of the head for touching the...

Page 62: ...hat the problem lies in drive compatibility Therefore check the drive compatibility 1 Causes of compatibility error 1 Tracking Position head Position deviating from the regul r position 2 Improper rot...

Page 63: ...r nge Voltage at TP6 when notch B is on the light path less than 0 5V 6 When it is not within the specified r nge check whether or not there is foreign matter on the light path If so remove it If not...

Page 64: ...4 Check of Head for Touching with Disk When replacing or repairing the following parts or assemblies check the head for touching the disk according to the following procedure O Head carriage ass y 1 M...

Page 65: ...e oscilloscope screen Then check so that the split asymmetry width of the second read data pulse waveform from the trigger pulse 6 Remove the alignment disk and load the work disk 7 Write a 1F Signal...

Page 66: ...otate the DD motor set short Plug J1 to mode 2 and pin 2 input Signal of the 34 pin l F connector to high level 1 MB 300 rpm mode 3 Move the head to track 79 4 Select the side 0 5 Write one cycle of a...

Page 67: ...ure to check and adjust the tracking alignment O Head carriage ass y O Stepping motor ass y O Steel beit O DD motor ass y O Clamper ass y 1 Measuring instruments and tools Two channel oscilloscope Ali...

Page 68: ...Signal of the 34 pin l F connector to high level 1 MB 300 rpm Mode 3 Select the side 0 4 Move the head to alignment check track 32 5 Check that the burst Signal wave form in Fig 303 is observed If th...

Page 69: ...o that the right and left peak points of B2 and B3 become the same as the calibrated value Then secure the motor 5 Step the head in and out repeatedly and fine adjust the installation of the stepping...

Page 70: ...nect the FDD tester with the tester connected turn its power off once 2 Connect the oscilloscope referring to 3 7 Check of tracking alignment Step 1 3 Loosen the track 00 sensor mounting screw Fig 406...

Page 71: ...channel oscilloscope to PJ1 8 index output and TP1 or TP2 pre amp output on the control PC board respectively Setting of oscilloscope CH 1 DC 2 V div 50 Atsec div CH2 AC 0 1 V div 50 tsec div Trigger...

Page 72: ...ng screw to the specified torque and execute Steps 3 5 in Check 3 Apply a small amount of screw lock adhesive to the head of the mounting screw 4 Check by TP5 that the output voltage of the index sens...

Page 73: ...tors 3 Mount the new control PC board ass y in the reverse procedure 4 Check the asymmetry in accordance with item 3 5 5 Check the read level and resolution in accordance with item 3 6 6 Check and adj...

Page 74: ...torque and apply screw lock 10 Check the write protect sensor referring item 3 1 11 Check the disk in sensor referring item 3 2 12 Check and adjust the index burst timing in accordance with item 3 9...

Page 75: ...D motor then draw the DD motor out from it s rotor side 4 Mount the new DD motor in the reverse procedure 5 Check and adjust the disk rotating speed in accordance with item 3 3 6 Check and adjust the...

Page 76: ...Tweezers FDD tester Pure alcohol or daiflon Screw lock adhesive Tools measuring instruments etc specified in reference items 2 Replacement procedure 1 Remove the control PC board ass y in accordance...

Page 77: ...PC board ass y and shield plate C 15 Connect the FDD tester and load the work disk 16 Rotating the DD motor repeatedly seek between track 00 and track 79 for 10 minutes 17 Check and adjust the trackin...

Page 78: ...w index sensor ass y in the reverse procedure 5 Check and adjust the index burst timing in accordance with item 3 9 4 10 Replacement of Track 00 Sensor Ass y 1 Tools Phillips screwdriver for M3 2 Repl...

Page 79: ...Chapter 11 Stepping m otor connector 11 77...

Page 80: ...ion The components of the FZ 506 is shown below DD motor ass y Stepping motor ass y Clamp base plate ass y Write protect sensor ass y Index sensor ass y Frame Track 00 sensor ass y Disk in sensor ass...

Page 81: ...13 PULLEY WASHER 1 14 CLAMP BASE PLATE ASS Y 1 15 CLAMPER ASS Y 1 16 CLAMPER SPRING 1 17 HEAD CARRIAGE ASS Y TYPE S 1 HEAD CARRIAGE ASS Y TYPE M 1 18 W P SENSOR ASS Y 1 19 INDEX SENSOR ASS Y 1 W ID S...

Page 82: ...please be sure to use replacement parts in the proper combination The correct head carriage assemblies contro PC board assembly combinations are shown in the table below please Order parts by number...

Page 83: ...2 L5 6 CERAMIC RESONATOR 4MHZ 1 OSC CAPACITOR 0 047 mF 50V 4 C14 15 22 23 CAPACITOR 0 022 mF 50V 4 C17 29 31 34 CAPACITOR 0 01 mF 50V 1 C35 CAPACITOR 4700PF 50V 1 C30 CAPACITOR 220PF 50V 1 C13 CAPACIT...

Page 84: ...W 4 3 K n 1 R49 RESISTOR 1 1 0 W 10K 13 R 14 25 26 35 36 38 40 43 45 54 55 RESISTOR 1 1 0 W 22KH 1 R 18 RESISTOR 1 1 0 W 30K11 1 R20 RESISTOR 1 1 0 W 39KH 1 R 19 RESISTOR 1 1 0 W 9 1 K a 1 R5 RESISTO...

Page 85: ...ChapterU Location of Electrical Parts 11 83...

Page 86: ...5V DRIVE SELECTO DRIVE SELECT1 DRIVE SELECT2 DRIVE SELECT3 INUSE HEAD LOAD t i r o C34 r n rrxx pi t v o o MODE SELECT 0 MOTOR ON ie DIRECTION STEP SIDE SELECT D WRITE GATE D WRITE DATA D TRACKOO WRIT...

Page 87: ...N Commodore Technical Training Friedrich Seele Stra e 10 3300 Braunschweig Tel 0531 89 5063 Fax 0531 857 74...

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