MBF COMPANY CONFIDENTIAL FIELD INFORMATION BULLETIN SERVICE GROUP(S): MICRO MFG: KAYPRO NACS TYPE(S): 5806,5807,9503,9505, MFG. MODEL(S): PC,PC30,XT 9707 CATEGORY: CPU DESC: DESKTOP COMPATIBLE *** TABLE OF CONTENTS AS OF 12/19/90 *** FIB 00001.General Information.........................................11/03/87 FIB 00002.KPC-286 CMOS ERROR FIX......................................05/02/88 FIB 00003.CONTINUOUS RESET FAILURES...................................05/02/88 FIB 00004.PC HARD DRIVE CONTROLLER JUMPERS............................05/02/88 CPU-KAYPRO-PC,PC30,XT-------------------------------Table Of Contents Pg01 of 01 FIB 00001 11/03/87 *** General Information *** 5806,5807,9503,9505,9707 MAINTENANCE APPROACH All Kaypro models will be maintanied on a board-swap level in the field. Any component level repair is to be done in Class 1 Computer Repair Centers only. Diagnostic procedures will be the same as for the IBM PC/XT family of computers. PC777 or equivalent can be used for most problems. NACS MACHINE TYPES AND FEATURE NUMBERS DESCRIPTION MFG # OS M/T CRC M/T PC W/2 FLOPPIES 4101 9707 PC-10 W/HD, 1 FLOPPY 4104 9707 PC-30 W/HD, 1 FLOPPY,RLL 9707 FIELD REPLACEABLE PARTS Description MFG PN Sorbus PN Combo I/O Controller w/768k 4310 NS090303 Dual speed Processor PCB 5235/5238 NS090305 Single speed Processor PCB 4226 NS090322 obsolete Main Bus Board (Motherboard) 4107/4344 NS090306 Multi-video PCB 1/2 length 4690 NS090301 Dual-video PCB full length 3805 not assgn Floppy drive w/slides 4113 NS090316 Use Panasonic drive JU4555AAG NS090119 Hard Drive 20 meg 4499 USE SEAGATE ST225 HD010225 NEC MODEL D5126 HD155126 Power Supply 4114 NS090318 Keyboard Assy AT/XT 4117 NS090319 Keyboard Assy (Enhanced) 5519 NS090326 Cable Assy FD/FDC 3314 NS090308 Cable Assy Grounding 3297 NS090309 Cable Assy Switch & keyboard conn 4455 NS090311 Cable assy LED/pwr 4473 NS090313 Cable assy led pws ind. 2876 NS090312 Chassis w/acc kit 4921 NS090315 Speaker & Cable assy 3328 NS090314 Monitor Green 4196 NS090300 Floppy Disk Kit 4340 NS090302 Hard Disk Controller 4674 NS090304 SCSI hard disk controller (obsolete) 1373 NS090022 Hard disk controller (RLL) 5616 Cable HD/HDC 1382 NS090307 Cable HD/HDC 34 pin 2744 NS090310 Monitor RGB 3250 not assgn AVAILABLE DOCUMENTATION Description MFG P/N Sorbus P/N CPU-KAYPRO-PC,PC30,XT-------------------------------FIB001 Pg001 Kaypro PC Users Guide 4242-B Kaypro PC-10 Users Guide 4362-B SHDBK-495 Kaypro PC Technical Manual 5097-B SHDBK-K02 Kaypro PC Users Guide (looseleaf) 5036-A SHDBK-K03 AVAILABLE TRAINING Micro Familiarization class is recommended. SPECIAL TOOLS Service Test Utility (diagnostic diskette) NS090113 SPECIAL HANDLING Warranty and post warranty maintenance will be provided in areas selected by Kaypro ( on-site and CRC). ORIGINATOR: JOHN HILL CPU-KAYPRO-PC,PC30,XT-------------------------------FIB001 Pg002 FIB 00002 05/02/88 *** KPC-286 CMOS ERROR FIX *** The following board modification will solve many of the PC286 CMOS ram errors. Error indication is known by: 1. Repeated "INVALID CONFIGURATION, PLEASE RUN SETUP". 2. Audible error beep code of 1-1-3. 3. Will boot only after Ctrl-Alt-Del. The fix involves replacing R9 (a 1.2K Ohm resistor) with an 1N6263 Diode. Physical placement is opposite of CR2 (the cathode band is down toward the card edge contact fingers). Also the capacitor at C11 (upper right hand corner) must be changed from a 0.1uf to a .47uf capacitor. This help stabilize power supply voltage at DS1210. Technically the voltage difference between VCC (Power on) and battery voltage (Power off) at DS1210 is not great enough. Therefore the DS1210 cannot switch voltage source or enable the CMOS ram properly. By replacing the series resistor R9 with a series diode, the total battery voltage drop accross both diodes (CR2 & the new one at R9) is increased by approximately .7 volt. This, in turn, increases the voltage potential difference at DS1210 assuring proper operation. Also, a 1 Meg resistor, watt, needs to be soldered from pin 2 to pin 5 at U5 on the backside of the board. FROM: KAYPRO TECH SUPPORT ORIGINATOR: JOHN HILL CPU-KAYPRO-PC,PC30,XT-------------------------------FIB002 Pg001 FIB 00003 05/02/88 *** CONTINUOUS RESET FAILURES *** Subject: PC286 and New 286i continuous RESET failures. 02/16/88 FROM Kaypro tech support RE: 3 Possible problems that cause continuous reset 1. Improper setup can cause continuous reset. Make sure, by going through each and every parameter with the tech, that setup is correct. This would entail making sure all third party boards or drives are identified in setup. 2. Certain 80286 processor chips, U10, are having heat related problems that cause a continuous state of reset or reset for a while and then lock up. The offending chips are AMD N80L286-12/S. AMD chips can easily be idenified by a large arrow on the chip. These chips do not have a heat sink covering the chip so they are readily readable. we are also sending an Intel 80286 chip without a heat sink.( the amd chip has Intel written on it for copywrite priveleges. Don't mix these chips up). The Intel chip works fine. We have AMD chips going out with a heat sink on the chip. These work fine also. The offending AMD 80286 chip without a heat sink has heat related problems. Spraying freon on the chip will make it work properly again, for a little while. The chips do not work in the temperature range they are specified to work in. 3. They have found several 160 watt power supplys on the production line that are causing the continuing state of reset. It seems crosstalk between the +5 and +12 volt lines is causing this problem. If setup is correct and they do not have the offending amd chip, swap out the power supply. ORIGINATOR: JOHN HILL CPU-KAYPRO-PC,PC30,XT-------------------------------FIB003 Pg001 FIB 00004 05/02/88 *** PC HARD DRIVE CONTROLLER JUMPERS *** JUMPER BLOCK SETTINGS FOR PC HARD DRIVE CONTROLLER WESTERN DIGITAL WD1002(A)-WX1 MFM (62-000042-013 and 62-000094-032 ROM) W3 ON BIOS ROM enabled W4 2-3 Device address 320H * W5 1-2 BIOS ROM 32K or 64K W6 2-3 RWC, for drives with less than 8 heads 1-2 For drives with more than 8 heads * W7 1-2 INTRQ 5 W8 2-3 First or only controller in system 013 ROM S1 3-5-6 For 20Mb drive S1 OPEN For 10Mb drive 032 ROM S1 OPEN Use dynamic configuration WD1002-27X RLL (62-000094-032, 062 and 002 ROM) W3 ON BIOS ROM enabled W4 2-3 Device address 320H * W5 1-2 BIOS ROM size W6 2-3 RWC, up to 8 heads 1-2 More than 8 heads, up to 16 * W7 1-2 INTRQ 5 W8 2-3 Standard factory setting ** W9 OPEN Disabled special firmware translation S1 6 NOTE: * Some PC/B will already have trace jumper on back-side. ** Some PC/B do not have this block. WD1002A-27X RLL (62-000094-002 ROM) No Jumper WDXT-GEN MFM (62-000128-000 ROM) No Jumper ADAPTEC ACB-2072 RLL (411503-00B ROM) No Jumper ACB-2070A RLL (Full length - not current) No Jumper DATA TECHNOLOGY CORPORATION DTC-5160CRH RLL (CRD06A ROM) W1 1-2 BIOS ROM size W2 3-4 ROM address W3 2-3 DACK 3 W4 1-2 DREQ 3 W5 2-3 IRQ 5 W7 ON Device address 320H NOTE: Virgin drives will have to be Low Level Formatted via Debug. Diagnostics will not format the drive with this controller the first time. CPU-KAYPRO-PC,PC30,XT-------------------------------FIB004 Pg001 NATIONAL COMPUTER LTD. NDC-5427 MFM (NCL 5427/00-00-05) JP1 1-2 Up to 8 heads 2-3 Up to 16 heads SW1 1 ON Drive with 612 cyl/4heads 2 thru 8 OFF NOTE: Only Diagnostic v3.25 will do Low Level Format with this controller. Any other version Diagnostics will not work. 17676*17676* ORIGINATOR: JOHN HILL CPU-KAYPRO-PC,PC30,XT-------------------------------FIB004 Pg002