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Thread: Tandy 1400HD woes

  1. #1

    Default Tandy 1400HD woes

    I was given a Tandy 1400HD. It came in 'pieces'. The power supply had a good deal of corrosion which I removed. Caps were bad as well, so I replaced most. I am in need of a technical manual for the power supply. Many of the caps had their values missing due to the corrosion and leaking.

    I came across the Tandy 1400LT technical manual but the power supply is in fact different. Anyone have the correct manual? Or can someone do me a solid and look inside your power supply and give me the value for about 1/2 dozen caps?

    THANKS!

    Carlos

  2. #2
    Join Date
    Feb 2014
    Location
    Netherlands
    Posts
    408

    Default

    @ColorComputerStore

    I have the same 1400HD with the same problems.
    There are only a few 1400HD left and they all have the same problems with the very complex power supply.
    I have been looking for the service manual, but there is no manual available.
    I have a part list of the power supply, see below.
    Don't forget to recap the small PCB below the hard disk, it seem very important.

    The BOM list:

    250-3505 1400HD

    Reference # Part# Part Description EO#
    ------------------------------------------------------------------------
    TR-1 1TD0047 TRANSISTOR,DTC144K 10511376
    FD-Q5 1TD0179 TRANSISTOR,UN2115-TX 10511970
    LG-Q004 LG-Q007 1TR0340 TRANSISTOR DTA143ES 10518363
    LG-Q008 1TR0340 TRANSISTOR DTA143ES 10518363
    LG-Q006 LG-Q009 1TR0723 XSTR SC XDC143ES B40 10519759
    PS-Q11 2TR0473 XSTR 2SC2655 T092 10526812
    PS-Q1 2TR0536 XSTR 2SB1140-T T0126 10527117
    PS-Q54 2TR0637 XSTR 2SC536-E-SPA B-40 10527554
    PS-Q46 2TR0713 XSTR 2SD1111 T092 10527869
    LG-Q001 LG-Q002 2TR0783 XSTR 2SD1683T T0126ML 10528099
    PR-Q3 2TR1004 XSTR 2SK1086-03 10529048
    PS-Q51 PR-Q1 2TR1081 XSTR 2SD1835T T092 10529436
    52 AXX0264 KEYBOARD ASSY 10543569
    AXX2102 2800HD/1100FD DIAGNOSTICS 10544344
    AXX2140 PORTABLE SYSTEM DIAG. 10544716
    93 BC0011 BUZZER,S03G05B 10553147
    LG-CV001 C0107 CAPACITOR,TRIMMER 10554400
    PS-L3 CA0287 COIL,15UH 1.7A CHOKE 10557171
    LG-L001 CA1699 COIL,CHOKE 200UH 10560175
    PS-C61 CC102KUBCC 1000PF +-10 500V CER 10571917
    LG-C057 CC103ZJBCC .01UF +80-20 50V CER 10572162
    PR-C1 PR-C2 PR-C10 CC104JJBG .1UF +-5 50V PYS 10572204
    PR-C11 PR-C12 CC104JJBG .1UF +-5 50V PYS 10572204
    PR-C3 PR-C8 CC128MCBA 1200UF +-20 10V ALP 10572766
    TLX-C8-20 CDA103ZJBC .01UF +80-20 50V CER 10575868
    FD-C28 FD-C30 FD-C33 CDA104ZFBC .1UF +80-20 25V CER 10575892
    FD-C34 CDA104ZFBC .1UF +80-20 25V CER 10575892
    FD-C8 FD-C9 FD-C25 CDA104ZFBC .1UF +80-20 25V CER 10575892
    FD-C26 FD-C27 CDR101JJBC 100PF +-5 50V CER 10577385
    TLX-C21 TLX-C22 CDR104ZJBC .1UF +80-20 50V CER 10577484
    TLX-C23 CDR104ZJBC .1UF +80-20 50V CER 10577484
    FD-C31 FD-C32 CDR221JJBC 220PF +-5 50V CER 10577534
    FD-C36 FD-C37 CDR222KJBC 2200PF +-10 50V CER 10577559
    FD-C12 CDR681JJBC 680PF +-5 50V CER 10577765
    FD-PQ1 CP0073 PHOTO COUPLER,GP1S56 10582971
    LG-BT001 CS2003 BATTERY,RECHARGEABLE 10587111
    18 CS2004 BATTERY,RECHARGEABLE 4.8V 10587129
    LG-X002 CX1084 CRYSTAL,24MHZ 10595403
    LG-X001 CX1085 CRYSTAL,12.45MHZ 10595411
    LG-X005 CX1086 CRYSTAL,32.768KHZ 10595429
    X-1 CX1088 CRYSTAL 15.000MHZ 10595437
    46 DB0114 COVER,BATTERY 10603975
    PS-D13 DX0070 DIODE SC GZB6.2B 10621977
    PS-D51 PS-D54 PS-D56 DX0077 DIODE SC ERA91-02 10621993
    PS-D14 DX0532 DIODE SC GZA7.5X 10623080
    PR-D1 DX0555 DIODE SC ERC90M-02 10623130
    PS-D2 PS-D3 DX1160 DIODE ERB81-004 10624898
    LG-0001-011 DX2230 DIODE SC 1SS133 10628121
    LG-0001-012 DX2230 DIODE SC 1SS133 10628121
    LG-0001-013 DX2230 DIODE SC 1SS133 10628121
    LG-0001-014 DX2230 DIODE SC 1SS133 10628121
    FD-12 HA0058 HEAD ASSY,MAGNETIC 10649309
    FD-6 HB0141 HOLDER ASSY,CARTRIDGE 10651735
    FD-9 HC0006 DAMPER,BLACK PLASTIC 10659845
    FD-20 HC0010 GUIDE,PLASTIC BLACK 10659860
    FD-21 HC0011 BEARING,BALL 10659878
    6 HC0014 HINGE,METAL RIGHT 10659894
    7 HC0015 HOUSING,HINGE RIGHT PLSTC 10659902
    8 HC0016 STOPPER,HINGE METAL 10659910
    12 HC0019 HINGE,METAL LEFT 10659928
    37 HC0022 STOPPER,LCD UNIT FAWN-GRY 10659936
    65 HC0028 BLIND,FLOPPY DISK DRIVE 10659951
    86 HC0031 BLIND,MODEM PCB METAL 10659969
    HC0403 MEMBRANE ASSY 10662096
    FD-18 HC0478 FLANGE,METAL 10662500
    47 HC0849 SPACER,HDD PCB 10664696
    FD-16 HC0881 BALL,STEPPER MOTOR 10664878
    34 HC5605 INSULATOR,LCD 10684645
    FD-17 HD0150 SCREW,SPECIAL MACH M2.6X5 10691038
    FD-23 HD0448 SCREW,PH/FLAT WSHR 2.6X4 10692085
    HD0649 SCREW,#6-32X1/4 10692929
    FD-14 HD8030 WASHER,FELT BLACK 10695138
    1 HL0032 HANDLE,BLACK PLASTIC 10702975
    PS-CN1 J0108 JACK,POWER 10720332
    LG-U007-1 LG-U042-1 JB0108 SOCKET,IC 28PIN 10735355
    LG-U026-1 LG-U027-1 JB0109 SOCKET,IC 40PIN 10735363
    LG-U041-1 JB0111 SOCKET,IC 32PIN 10735389
    LG-CN008 JE0452 CONNECTOR,8P FEMALE 10740918
    23 K0576 KNOB,CONTRAST BLACK 10752293
    KB-1 KC0058 KEY TOP UNIT,CHARACTOR 10788214
    LU5 L0096 BACK LIGHT,ELECTROLUMINES 10790525
    LU5 L0107 BACK LIGHT,ELECTROLUMINES 10790616
    LE-LED1 LE-LED3 LA0123 LED,LAMP RED SQ 10797231
    LE-LED4 LE-LED5 LA0123 LED,LAMP RED SQ 10797231
    LE-LED2 LA0124 LED,LAMP GREEN SQ 10797249
    36 MB0065 BRACKET,MOUNTING HINGE 10805919
    63 MB0068 BRACKET,FLOPPY DISK DRIVE 10805935
    FD-19 MD0105 MOTOR ASSY,STEPPING 10809960
    FD-24 MD0106 MOTOR ASSY,SPINDLE RED 10809978
    74 MF0008 FAN,AC 12V .06A 10815645
    MS2503501 MANUAL,SERVICE 25-3501 10825487
    MU2503501 MANUAL,USERS 25-3501 10848331
    PS-U31 MX0062 JRC2904D OP AMP 10868628
    PS-U41 MX0513 IC,UPA1522H 10 PIN SIP 10871648
    PS-U11 MX0670 IC, MB3759 SW REG 10872737
    LG-U005 LG-U39 LG-U052 MX1588 IC,M74HC244FP 20P C-MOS 10878254
    LG-U002 MX1589 IC,M74HC368FP 16P C-MOS 10878262
    LG-U003 MX1590 IC,M74ALS1240P 20P TTL 10878270
    LG-U016 MX1591 IC,M74HC367FP 16P C-MOS 10878288
    LG-U008 MX1593 IC,M74HC04FP 14P C-MOS 10878296
    LG-U009 MX1594 IC,MB622160 100P C-MOS 10878304
    LG-U010 MX1595 IC,V6366C-F 100P C-MOS 10878312
    LG-U018 MX1598 IC,M74HC151FP-32A 10878338
    LG-U019 MX1600 IC,MC145406M-L C-MOS 16P 10878353
    LG-U022 LG-U023 MX1601 IC,M74HCU04FP C-MOS 14P 10878361
    LG-U037 MX1601 IC,M74HCU04FP C-MOS 14P 10878361
    LG-U025 MX1602 IC,T4770A 144P C-MOS 10878379
    LG-U026 MX1603 IC,UPD70108C-10 40P DIP 10878387
    LG-U029 MX1605 IC,LD1102CV C-MOS 44P 10878403
    LG-U030 MX1606 IC,SED9420MAC C-MOS 24P 10878411
    LG-U031 MX1607 IC,M74HC245FP C-MOS 20P 10878429
    LG-U032 LG-U033 MX1608 IC,M5M44256BP-10 RAM 20P 10878437
    LG-U034 LG-U047 MX1608 IC,M5M44256BP-10 RAM 20P 10878437
    LG-U048 LG-U049 MX1608 IC,M5M44256BP-10 RAM 20P 10878437
    PS-U1 MX1609 IC,RE5RA30A-A REG 3PIN 10878445
    LG-U058 MX1610 IC,M74HC02FP C-MOS 14P 10878452
    TLX-IC2 MX1612 IC,TC40H368F HS-C2-MOS 10878478
    LG-U044 MX1614 IC,RF5C15 C-MOS 18P RTC 10878486
    LG-U045 MX1615 IC,M74HC32FP C-MOS 14P 10878494
    LG-U055 MX1616 IC,M74HC175FP-32A C-MOS 10878502
    LG-U053 MX1617 IC,PST531A 8PIN 10878510
    PS-U32 MX1618 IC,NJM431L 3PIN 10878528
    PS-U41 MX1619 IC,UPA1520H 10PIN SIP 10878536
    TLX-IC3 MX1622 IC,TC40H163F HS-C2-MOS 10878544
    TLX-IC5 MX1623 IC,LA5316M 20P FLAT PAK 10878551
    TLX-IC7 MX1624 IC,TA75902F 14P FLAT PAK 10878569
    TLX-XD1-8 MX1625 IC,T7778A LCD CONTROLLER 10878577
    TLX-YD1-3 MX1626 IC,T7900 LCD CONTROLLER 10878585
    LG-U014 LG-U015 MX1789 IC,LC3664N-12 10879864
    LG-U051 MX1790 IC,M74HC175FP 10879872
    LG-U035 MX1791 IC,M74ALS1244P ALSTTL 20P 10879880
    LG-U059 MX1793 IC,M74C14FP C-MOS 14 PIN 10879906
    LG-U001 MX1794 IC,M74HC157FP-32A C-MOS 10879914
    LG-U043 MX1795 IC,MC74HC4538F-L C-MOS 10879922
    LG-U028 LG-U050 MX1796 IC,LC92018B-291 C-MOS 10879930
    LG-U013 MX1798 IC,MBL80C49NPFG761BN 10879948
    LG-U054 MX1800 IC,PST520C-T SYSTEM RESET 10879963
    LG-U056 MX1809 IC,M74HC00FP-32A 14 PIN 10880045
    LG-U061 MX1811 IC,M74HC393FP 14P C-MOS 10880052
    LG-U062 MX1812 IC,M74HC158FP 16P C-MOS 10880060
    FD-U1 MX1813 IC,1344298000 FDD 10880078
    FD-U5 MX1814 IC,1344347900 MOTOR DRIVE 10880086
    IC-3 IC-10 MX1817 IC,TC54256AF ROM 28P SMD 10880094
    IC-5 MX1819 IC,20513B C-M0S 84P SMD 10880102
    IC-8 MX1820 IC,20527C C-MOS 28P SMD 10880110
    SP-U2 MX1937 IC,LA6393D COMPAR 10881076
    LG-U013 MX3327 IC,SN74HC08NS-NT 10890523
    LG-U063 MX3332 IC,MBL80 C49 10890564
    IC6 IC7 MX4160 IC,SN74HC240NS 20P SMD 10895647
    IC2 MX4348 IC,Z86C9112VSC1262 C-MOS 10896728
    IC3 IC10 MX4349 IC,TC53257F-K950 10896736
    TLX-IC4 MX4773 40H074F DUAL FF 10898690
    LG-U046 MX4779 386 LIN AMP 10898732
    LG-U057 MX7719 DS14C89AN C-MOS RS-232C 10912012
    FD-U2 MX7744 BA6581CK C-MOS 10912129
    LG-U007 MXP0639 IC,NMC27C64Q FC14A1 C-MOS 10932218
    LG-U042 MXP0778 IC,ROM BIOS CS=C800 10933216
    LG-U060 MXP1044 IC,GAL 16V8 25LP 20P CMOS 10934800
    PS-R7 N0003BEEC .22 1% 1/4W MTF RES 10937944
    PR-R7 PR-R8 N0063ECCC 10 5% 1/6W CBF RES 10939072
    PS-R81 PS-R84 N0078EEC 22 5% 1/4W CBF RES 10939395
    PS-R2 PS-R69 PS-R94 N0079ECCC 24K 5% 1/6W CBF RES 10939460
    PS-R82 N0099EEC 47 5% 1/4W CBF RES 10939742
    LG-R014 LG-R043 N0132ECCC 100 5% 1/6W CBF RES 10940161
    LG-R073 LG-R078 N0132ECCC 100 5% 1/6W CBF RES 10940161
    LG-R091 LG-R093 N0132ECCC 100 5% 1/6W CBF RES 10940161
    LG-R092 PS-R4 PS-R5 N0132ECCC 100 5% 1/6W CBF RES 10940161
    PS-R33 N0132ECCC 100 5% 1/6W CBF RES 10940161
    PS-R32 N0136ECCC 120 5% 1/6W CBF RES 10940294
    PS-R22 N0146ECCC 200 5% 1/6W CBF RES 10940500
    PS-R92 N0155ECCC 270 5% 1/6W CBF RES 10940724
    LG-R095 LG-R096 N0159ECCC 330 5% 1/6W CBF RES 10940872
    LG-R006 LG-R007 N0196ECCC 1K 5% 1/6W CBF RES 10941334
    LG-R008 LG-R009 N0196ECCC 1K 5% 1/6W CBF RES 10941334
    LG-R010 LG-R083 N0196ECCC 1K 5% 1/6W CBF RES 10941334
    LG-R085 LG-R086 N0196ECCC 1K 5% 1/6W CBF RES 10941334
    LG-R088 LG-R094 N0196ECCC 1K 5% 1/6W CBF RES 10941334
    PS-R27 PS-R28 PS-R29 N0196ECCC 1K 5% 1/6W CBF RES 10941334
    PS-R62 N0196ECCC 1K 5% 1/6W CBF RES 10941334
    PS-R26 N0202ECCC 1.3K 5% 1/6W CBF RES 10941458
    PS-R16 PS-R17 N0216ECCC 2.2K 5% 1/6W CBF RES 10941664
    LG-R046 PR-R11 N0219ECCC 2.4K 5% 1/6W CBF RES 10941730
    LG-R069 LG-R079 N0230ECCC 3.3K 5% 1/6W CBF RES 10941896
    LG-R001 LG-R002 N0247ECCC 4.7K 5% 1/6W CBF RES 10942084
    LG-R003 LG-R019 N0247ECCC 4.7K 5% 1/6W CBF RES 10942084
    LG-R029 LG-R074 N0247ECCC 4.7K 5% 1/6W CBF RES 10942084
    LG-R072 PS-R24 N0247ECCC 4.7K 5% 1/6W CBF RES 10942084
    LG-R076 LG-R077 N0247ECCC 4.7K 5% 1/6W CBF RES 10942084
    PS-R91 N0257ECCC 5.6K 5% 1/6W CBF RES 10942191
    LG-R004 LG-R005 N0281ECCC 10K 5% 1/6W CBF RES 10942472
    LG-R012 LG-R013 N0281ECCC 10K 5% 1/6W CBF RES 10942472
    LG-R021 LG-R028 N0281ECCC 10K 5% 1/6W CBF RES 10942472
    LG-R038 LG-R041 N0281ECCC 10K 5% 1/6W CBF RES 10942472
    LG-R065 LG-R071 N0281ECCC 10K 5% 1/6W CBF RES 10942472
    LG-R075 LG-R081 N0281ECCC 10K 5% 1/6W CBF RES 10942472
    PS-R87 PS-R96 N0281ECCC 10K 5% 1/6W CBF RES 10942472
    PS-R11 N0311ECCC 22K 5% 1/6W CBF RES 10942977
    LG-R022 PS-R61 N0340ECCC 47K 5% 1/6W CBF RES 10943215
    LG-R080 N0340ECCC 47K 5% 1/6W CBF RES 10943215
    LG-R017 LG-R090 N0354ECCC 68K 5% 1/6W CBF RES 10943462
    PR-R5 PS-R90 N0354ECCC 68K 5% 1/6W CBF RES 10943462
    PS-R49 PS-R95 N0371ECCC 100K 5% 1/6W CBF RES 10943595
    PS-R50 PS-R12 PS-R13 N0371ECCC 100K 5% 1/6W CBF RES 10943595
    PS-R70 N0387ECCC 180K 5% 1/6W CBF RES 10943736
    PS-R86 N0396ECCC 220K 5% 1/6W CBF RES 10943819
    PS-R30 N0398ECCC 240K 5% 1/6W CBF RES 10943850
    PR-R3 N0423ECCC 470K 5% 1/6W CBF RES 10944056
    PS-R88 N0527ECCC 75K 5% 1/6W CBF RES 10944502
    FD-R52 NDA0159EDC 330 5% 1/10W CBF RES 10946630
    R-04 NDA0371EDG 100K 5% 1/10W MLG RES 10948230
    FD-R49 NDA0445EDC 1M 5% 1/10W CBF RES 10948644
    FD-R9 NDA0575BDC 3.09K 1% 1/10W CBF RES 10948891
    R15 R3 NDB0281EDG 10K 5% 1/10W MLG RES 10949154
    R6 R7 R8 R9 R13 R14 NDB0281EDG 10K 5% 1/10W MLG RES 10949154
    FD-R22 FD-R23 NDR0159EBC 330 5% 1/8W CBF RES 10950020
    R10 NDR0196EDG 1K 5% 1/10W MLG RES 10950202
    FD-R33 NDS0155EAC 270 5% 1/16W CBF RES 10952133
    FD-R29 NDS0196EAC 1K 5% 1/16W CBF RES 10952323
    PS-F2 NE0054 RESISTOR,FUSE 6A 125V 10953743
    PS-F1 NE0055 RESISTOR,FUSE 3.15A 125V 10953750
    LG-VR001 PA0157 POT,VOLUME 4.7K OHM 10978229
    LG-VR002 PA0158 POT,CONTRAST 10K OHM 10978237
    PR-VR1 PA0210 POT,MTLGLZ VM50K PV B/3K 10978633
    PS-RY1 R0030 RELAY,ORWH-SS112D 5A 5PIN 10983963
    FD-5 RB0366 SPRING,SLIDER 11008505
    FD-11 RB0367 SPRING,ROD METAL 11008513
    FD-13 RB0368 SPRING,TENSION LEVER 11008521
    38 RB0370 SPRING,STOPPER 11008547
    FD-4 RL0077 LEVER,SLIDER METAL 11039815
    FD-15 RL0078 LEVER,LATCH METAL 11039823
    LG-SW001 SA0132 SWITCH,SLIDE 3P L-TYPE 11067618
    PS-T1 TA0101 TRANSFORMER,POWER E14 10P 11091394
    LG-T001 TB0258 TRANSFORMER,INVERTER E15 11100807
    PR-T1 TB0296 TRANSFORMER,PULSE 11101169
    33 W0074 CABLE ASSY,SIGNAL 20 PIN 11106598
    94 WE0080 ADAPTOR,AC120V/DC12V 2.2A 11124211
    68 WF0109 CABLE ASSY,SIGNAL 20P 11126976
    50 WF0175 CABLE,SIGNAL HDD 11127602
    54 WF0176 CABLE,SIGNAL 34P INT FDD 11127610
    72 XB2536 PCB ASSY,POWER SOURCE 11141348
    41 XB2538 PCB ASSY,LED 11141363
    FD-22 XB2539 PWB ASSY 11141371
    68 XB2809 PWB ASSY,SR-121 11143377
    70 XB2810 PCB ASSY,MOTHER 11143385
    9 Z2511 COVER,HINGE RIGHT 11185642
    10 Z2512 COVER,HINGE LEFT 11185659
    14 Z2513 CASE,BATTERY PLASTIC BLK 11185667
    49 Z2519 CASE,TOP FAWN-GREY 11185691
    48 Z2524 COVER,REAR FAWN-GREY 11185709
    87 Z2565 PANEL,REAR 11185949
    88 Z2594 CASE,BOTTOM PLASTIC BLACK 11186129
    FD-1 Z2610 BEZEL ASSY,FRONT BEIGE 11186210
    FD-7 Z2611 COVER,METAL 11186228
    39 Z3179 CASE,LCD UNIT FAWN-GREY 11189867
    44 Z3181 PANEL,DECORATION 11189875

  3. #3

    Default

    Could you do me a massive favor and tell me what the values of these capacitors are?
    C4
    C14
    C43
    C52

    THANK YOU!

  4. #4
    Join Date
    Feb 2014
    Location
    Netherlands
    Posts
    408

    Default

    Sorry I can't help you.
    The computer was assembled and placed in a box and stored somewhere else.

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