MBF COMPANY CONFIDENTIAL FIELD INFORMATION BULLETIN SERVICE GROUP(S): MINI MFG: BASIC FOUR NACS TYPE(S): 4302,4303,4306 MFG. MODEL(S): 4302,4303,MDT,MPC CATEGORY: VIDEO TERMINAL DESC: 12" & 15" MDT *** TABLE OF CONTENTS AS OF 12/23/90 *** FIB 00001.General Information.........................................10/16/86 FIB 00002.Potential High Voltage Hazard - 15" MDT.....................01/15/82 FIB 00003.Potential High Voltage Arcing - 12" MPC Only................01/15/82 FIB 00004.MDT,Missing Cable Clamp.....................................07/01/82 FIB 00005.CPM/VDM PCBA Interchangeability.............................12/01/82 FIB 00006.Part Numbers for Fuse Holder and Fuse Carrier...............08/15/83 FIB 00007.Battery Backup Installation Instructions....................08/15/83 FIB 00008.ICOM Service Jumper Cable...................................08/15/83 FIB 00009.Printer ERRS on Word Processing Printer Due to Improper Grou08/15/83 FIB 00010.Minimum REV Level of CPM/VDM for Use With A Modem...........08/15/83 FIB 00011.Self Test Failures..........................................08/15/83 FIB 00012."Wrong System and/or Hardware" Message......................08/15/83 FIB 00013.Serial Interface Boards.....................................08/30/85 FIB 00014.Grounding Checks............................................12/24/86 VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------Table Of Contents Pg01 of 01 FIB 00001 10/16/86 *** General Information *** The multifunction display terminal (MDT) and multifunction processing computer (MPC) are intelligent terminals which communicate with a host CPU. Each terminal contains its own processor and 64K of memory. VDT emulation (RS232 cables) maximum cable lengths are: 2400 baud - 1000 feet 9600 baud - 250 feet Part number prefix: MM87xxxx *** NACS MACHINE TYPES AND FEATURE NUMBERS *** MDT, DATAWORD II, 15" CRT, Sorbus Type = 4271, Basic Four Model = 4302,7561 MPC, S80 TERMINAL, 12" CRT, Sorbus Type = 4262, Basic Four Model = 4303,7310 *** AVAILABLE DOCUMENTATION *** S-HDBK-241 - BFISD 5120 Dataword II Level 2.0 Referance Manual S-HDBK-238 - BFISD 5124 Dataword II Level 2.0 Quick Reference Manual S-HDBK-277 - 7561 Maintenance Manual S-HDBK-216 - Sorbus Handbook For Basic Four S/80 S-HDBK-258 - Model 7310 Intelligent Terminal Service Manual *** AVAILABLE TRAINING *** Included in the BBIII/IV Basic schools. *** SPECIAL TOOLS *** No special tools are required. *** SPECIAL ADMINISTRATIVE PROCEEDURES *** There are no special administrative procedures required. ORIGINATOR: N. Jones VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------FIB001 Pg001 FIB 00002 01/15/82 *** Potential High Voltage Hazard - 15" MDT *** There is a potential high-voltage hazard on some 15" monitor PCBAs in the MDT. The wire from the high-voltage transformer (T1) to the high-voltage trippler may not be adaquately insulated at the trippler terminal. Since 6000 V are present on this terminal when the unit is powered on, all MDTs should be checked for proper safety insulation whenever a unit is serviced or installed. CORRECTION Power the unit off and unplug the ac line. Allow 1 minute for the high voltage to bleed off. Remove the monitor PCBA and liberally cover the terminal standoff with silicone rubber sealant (follow manufacturer's directions for proper application). Ensure that all exposed wiring is adequately insulated. PARTS AFFECTED: MM871050/903175-001 PCBA, 15" monitor DRAWING INFORMATION: See TECH TALK 5-VI-3 for drawing infomation if needed. ORIGINATOR: TIC VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------FIB002 Pg001 FIB 00003 01/15/82 *** Potential High Voltage Arcing - 12" MPC Only *** Original Document Name - Tech Talk 5-VI-4 Some 12" monitor PCBs were incorrectly manufactured. The high-voltage lead on the flyback transformer is too long and may arc to other board components or to the terminal top cover. Total wire length must not exceed 2", wire must be formed away from components and covers. Replace the monitor board if these conditions cannot be met. DRAWING INFORMATION: See Tech Talk for illustration if needed. ORIGINATOR: TIC VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------FIB003 Pg001 FIB 00004 07/01/82 *** MDT,Missing Cable Clamp *** ORIGINAL DOCUMENT NAME = MINI ALERT 41 SUBJECT: MDT, MISSING CABLE CLAMP The cable clamp used to secure the VDT emulation cable to the enclosure may be . missing on some 12" and 15" MDT's. When required order as follows: MM888030 P/N 907169-001 Cable Clamp Kit * The kit includes screws and washers. ORIGINATOR: J. Van Oordt VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------FIB004 Pg001 FIB 00005 12/01/82 *** CPM/VDM PCBA Interchangeability *** ORIGINAL DOCUMENT NAME: Mini Alert 91 SUBJECT: CPM/VDM PCBA INTERCHANGEABILITY BFISD MODEL 4302/4303, NACS TYPE 4262 Two versions of the CPM/VDM PCBA for DataWord II Terminals are now available. They are compatible and spare parts orders will be filled with either one. The original board was: MM871010, P/N 903179-003, PCBA CPM/VDM w/o crystal The new board is: MM871012, P/N 903295-001, PCBA CPM/VDM w/o crystal All boards are stocked without crystal Y1. When replacing a PCBA use the crystal from the defective board. If necessary, order crystal according to table below. Many components have been relocated but their function remains the same. The following tables shows some important components locations and functions. Y1 Crystal (Location: 2A on 903179, 8A on 903295 Monitor Type Value MM P/N BFISD P/N 12", 60 Hz 18.144 MHz 877030 150001-004 12", 50 Hz 15.120 MHz 877035 150001-008 15", 60 Hz 22.032 MHz 877040 150001-006 15", 50 Hz 18.360 MHz 877045 150001-009 SW 1 - SWITCH SETTINGS (Location: 3P on 903179, 8T on 903295) Position Function ON (Closed) OFF(Open) SW1-8.......VDT Emulation Baud Rate.......2400..........9600 SW1-7.......Not Used SW1-6.......Not Used SW1-5.......Screen Size...................12"...........15" SW1-4.......Switches 4 to 2 are SW1-3.......set according to SW1-2.......the table below _______________________________________ : SW. 4 : SW. 3 : SW. 2 : Terminal No.: :_______:_______:_______:_____________: : : : : : : OFF : OFF : OFF : 0 : : ON : OFF : OFF : 1 : : OFF : ON : OFF : 2 : : ON : ON : OFF : 3 : : OFF : OFF : ON : 4 : : ON : OFF : ON : 5 : : OFF : ON : ON : 6 : : ON : ON : ON : 7 : :_____________________________________: SW1-1.......Not used PROMS - Shown for reference only VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------FIB005 Pg001 Function P/N 903179 Loc. 903295 Loc. Self Test 165009-034 7H 4H IPL 165009-024 7J 4K Character Generator 165024-002 5H 9F Character Generator 165024-003 5J 9G *P/N may change according to PCBA Rev. Level. ORIGINATOR: J. Van Oordt VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------FIB005 Pg002 FIB 00006 08/15/83 *** Part Numbers for Fuse Holder and Fuse Carrier *** Original Document Name - Tech Talk 5-VI-6 The part numbers for the fuse holder and fuse carrier are not listed in the parts cross reference. Part numbers are: Fuse carrier - MM160211 338005-001 Fuse holder - YY010180 338006-001 ORIGINATOR: TIC VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------FIB006 Pg001 FIB 00007 08/15/83 *** Battery Backup Installation Instructions *** Original Document Name - Tech Talk 5-VI-12 1. Remove AC power to the terminal. 2. Remove terminal aux power supply PCB (MM871030/903189-001) from slot J3. 3. Install terminal BBU (battery backup) power supply PCB (MM871040/903197-001) in slot J3. It may be necessary to reconnect the battery wires if they were disconnected for shipment. TESTING BBU IN MDT 1. With AC power present and the power switch on, measure the following voltages at connector J3 on the backplane: Use P2 (margin connector) pin 1 as logic ground. Pin 5 = -5VBB Pin 6 = +5VBB Pin 7 = +12VBB 2. Unplug AC power cord with the power switch on, the voltages measured in the previous step should still be present. The BBU should maintain these voltages for approximately 30 minutes. NOTE: Batteries will require charging for up to 24 hours when the BBU PCB is installed and after any sustained battery backup use before correct outputs are obtained. 3. Reinstall the AC power cord and verify that the unit performs a power-fail recovery. Refer to S/80 System User's Guide (BFISD 5134), Section 12, for detailed power-fail recovery procedures. ORIGINATOR: J. Van Oordt VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------FIB007 Pg001 FIB 00008 08/15/83 *** ICOM Service Jumper Cable *** Original Document Name - Tech Talk 5-VI-13 There is now available a service jumper cable to be used when multiple MDTs are daisy chained together and an MDT in the middle of the daisy chain must be removed from a system in operation. The part number is MM879010/906740-001. ORIGINATOR: TIC VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------FIB008 Pg001 FIB 00009 08/15/83 *** Printer ERRS on Word Processing Printer Due to Improper Grounding *** SYMPTOMS: 1. Stopping in the middle of printout with error light on (Diablo). 2. Incorrect characters printed. 3. Text repeating on printout. CAUSE: 1. Check cable shielding connections. Shield should be connected at the printer, at the connector between the printer cable and the cable from the MDT. The shield wire should NOT be connected at the MDT. 2. Check for logic to frame ground isolation in both MDT and printer. Check FIBs labled grounding checks. 3. Plug both MDT and printer into the same AC receptacle to reduce ground potential difference. ORIGINATOR: N. Jones VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------FIB009 Pg001 FIB 00010 08/15/83 *** Minimum REV Level of CPM/VDM for Use With A Modem *** Original Document Name - Tech Talk 5-VI-16 In order to interface a S80 MPC to a modem the CPM/VDM PCB (MM871010/903179) must be a rev G or later. For detail on the necessary change refer to the Tech Talk. ORIGINATOR: C. Corby VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------FIB010 Pg001 FIB 00011 08/15/83 *** Self Test Failures *** Original Document Name - Tech Talk - 5-VI-17 Intermittant self test failures (green light does not illuminate) will occur if the CPM/VDM PCB (MM871010/903179-003) is below rev J. ORIGINATOR: TIC VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------FIB011 Pg001 FIB 00012 08/15/83 *** "Wrong System and/or Hardware" Message *** Original Document Name - Tech Talk 5-VI-34 Whenever an MDT is powered off and then powered on at a later time, the MDT goes through an IPL routine, trying to communicate with the IMLC controller in the CPU. If the CPU has been powered off and then powered on at a later time, the IMLC Controller is not active until program "WPS.LD" is run from terminal "T0". When "WPS.LD" is run, ghost tasks are started by the program. If, however, the ghost tasks were started the previous day, (which they would have been), "WPS.LD" cannot restart them unless they are first released. This can be done manually, or by reloading BOSS. If "WPS.LD" is run and ghost tasks are already started, a message - "WRONG SYSTEM AND/OR HARDWARE" is printed on the VDT (T0). Either reload BOSS, or check the configuration for the number of ghost tasks (one per MDT), and manually release them. (RELEASE "G0", etc.). ORIGINATOR: S. Schwartz VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------FIB012 Pg001 FIB 00013 08/30/85 *** Serial Interface Boards *** ORIGINAL DOCUMENT: Mini Alert # 408 Problem: All controller boards with 1488 and 1489 Chips frequently fails during an electrical storm. Solution: These boards can be repaired in the field by replacing the Chips that are on the IC sockets. Order the Chips and keep them in your tool bags and replace them when one of the channels are not functioning. The IC Chip inventory control numbers are as follows: 1. OR999398 IC, 1488L 2. YY003599 IC, 1489 The following are the boards that have the 1488/1489 on IC sockets: 1. MM081018 901706 PCBA, 1 Channel Controller Board 13XX 2. MM081019 901708 PCBA, 4 Channel Controller Board 13XX 3. MM081020 901420 PCBA, 8 Channel Controller Board 13XX 4. MM361000 903271-001 PCBA, Tritel Logic Board 5. MM362070 903300-003 PCBA, Whisper Logic Board 6. MM531011 903441-002 PCBA, CMB 2000 7. MM531040 903390-001 PCBA, 4-Way Controller 2000 8. MM720010 901810 PCBA, 7230 Logic Board 7230 9. MM730010 901990-001 PCBA, 7250 Logic Board 7250 10. MM741020 903260-001 PCBA, 7270 Logic Board 7270 11. MM780010 903373-001 PCBA, EVDT Logic Board EVDT 12. MM780150 903462-001 PCBA, EDT Logic Board EDT 13. MM821020 903242-001 PCBA, 8 Channel Controller Board 13XX 14. MM831061 903149-002 PCBA, 1345 Accessory Board 13XX 15. MM871010 903179-003 PCBA, CPM/VDM Board MDT ORIGINATOR: E. Unten VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------FIB013 Pg001 FIB 00014 12/24/86 *** Grounding Checks *** Logic and frame ground should be isolated in the MPC or MDT to reduce noise on logic ground, reduce the sensitivity to static discharge, and reduce the sensitivity to AC ground potential differences. To check for proper isolation: 1. Remove AC power. 2. Disconnect all signal cables from unit. 3. Check resistance between logic ground (use CRT frame) and frame ground (RFI filter). If greater than 10K ohms ground isolation is good. If the resistance is lower than 10K there is a logic to frame short in the unit that must be located, perform the following checks to isolate: 1. Remove cables from the main power supply and unplug from the motherboard. If the resistance did not change significantly the problem is probably not in the power supply but leave disconnected until the short is found due to possible multiple shorts and proceed to the next step. Check for a jumper labled A to B located near connector P1 on the power supply PCB, it should be out. If there is no jumper and the power supply has a short it must be replaced. 2. Disconnect the keyboard. If the resistance did not change significantly the problem is probably not in the keyboard but leave disconnected until the short is found due to the potential for multiple shorts and proceed to the next step. There may be an unwanted land pattern in the keyboard. Remove bottom of keyboard housing and make a cut in the wide land (which connects to a feed through) located between key pads 78 and 15. Reconnect to the unit and if the resistance is >10K the keyboard is OK, otherwise replace the keyboard. 3. Examine the enclosure (which is covered with a conductive EMI coating) for any potential shorts to logic ground. The most critical areas are: 1). The left side of the CRT mounting bracket to the empty PCB support rail. 2). The bottom of the CRT mounting bracket to the base of the enclosure. 3). Under the motherboard, to the base of the enclosure. If a contact point is located, remove the conductive coating with a knife or insulate with electrical tape. After a short is found and corrected, reconnect all other components that were previously disconnected while continuing to monitor the resistance between logic and frame grounds. There may be multiple shorts on the unit. NOTE: There is a potential shock hazard due to improper crimps on the monitor ground leads. Check as follows: 1). Disconnect the two spade lugs (located on the bottom left side of the CRT frame near the CPM/VDM PCB). 2). Check for continuity between the spade lugs and the end of their respective black and white wires (one terminates at CRT neck, the other on the monitor PCB). If OK reconnect, if no continuity, solder lug to wire and reconnect. VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------FIB014 Pg001 ORIGINATOR: N. Jones VIDEO TERMINAL-BASIC FOUR-4302,4303,MDT,MPC---------FIB014 Pg002