/ Other Field Change Order

Title Order No  
Parent
AC Adapter Replacement Field Change Order
This document outlines the procedure to replace defective AC adapters (30-47941-01) due to a potential electrical shock hazard. 		VP5XX-F001
Adaptec 1742A Not Compatible with OSF/1 Field Change Order
This Field Change Order (FCO) provides instructions to upgrade the firmware of the Adaptec 1742A SCSI controller to ensure compatibility with the OSF/1 operating system. 		PB22H-0002
AlphaServer 800 Combo Slot -12v Issue Field Change Order Instructions
Field change order instructions for correcting an incorrect wiring issue in the AlphaServer 800 system module combo slot. 		00-AS800 F001
BIOS Support for 5.25-Inch Diskettes Field Change Order
This document outlines the procedure for upgrading the BIOS on various DECpc computers to support 5.25-inch, 360KB formatted diskettes. 		PC744-F001
Blocks Lost/Position Lost Error on Backup Operation Field Change Order
This document outlines the rework procedure for the TA81 tape transport to resolve 'Blocks Lost' or 'Position Lost' errors during backup. 		TA81-I001
Bugs found in ROM code in VAXstation 4000 Model VLC Field Change Order
This Field Change Order (FCO) details the resolution of various ROM code bugs in the VAXstation 4000 Model VLC by replacing base system ROMs with version V1.3. 		KA48-F001
Bugs Found in ROM Code in VS4000, Model 60 Field Change Order V1.1
This document outlines a Field Change Order (FCO) for the VAXstation 4000 Model 60 to fix various bugs in the V1.1 ROM code. 		KA46-F001
Capacitor May Blow After Power Supply Fuse Blows Field Change Order
This field change order addresses a potential issue where a blown power supply fuse in LP37 printers causes subsequent component damage. 		LP37-S001
Command Timeouts Field Change Order
This document outlines an FCO for the RF31 disk drive to address command timeouts and other diagnostic/interface issues by installing new firmware. 		RF31-0001
Command Timeouts Field Change Order
This Field Change Order addresses command timeout issues on RF72 modules by updating firmware to revision D01 or higher. 		RF72-0001
Connector Can Be Broken on the 60Hz Power Supply Field Change Order
This Field Change Order provides instructions to retrofit the 60Hz power supply with plastic connector braces to prevent potential safety hazards caused by broken J11 connectors. 		TA91-S001
CPU Error Messages and Windows NT Support Field Change Order
This Field Change Order (FCO) details the replacement of B2040-AA CPU modules with B2040-AB to resolve error messages and enable Windows NT support. 		KN470-AA-0001
CPU Module May Produce Wrong Answers to Floating Point Operations
Field Change Order to upgrade KA660 CPU modules for systems shipping prior to December 10, 1991 to fix floating point operation and password failure issues. 		KA660-0001
DA11-F Bus Window Control Engineering Change Order Log
An engineering change order log for the M7284 DA11-F Bus Window Control, listing revisions and corrections made between 1973 and 1974. 		M7284
Data Integrity Improvement of External Drives Field Change Order
This document outlines the procedure to upgrade the RQDXE Module (M7513) to Revision B1 or greater to improve external drive data integrity. 		RQDXE-I001
Datamec 2020 Mag Tape Transport Engineering Change Order Log
A log of engineering change orders for the TU20 Datamec 2020 Magnetic Tape Transport unit. 		TU20
DD11-B Engineering Change Order Log Revision A
This document is a log of engineering change orders (ECOs) for the DD11-B backplane unit in the PDP-11 family. 		DD11-B
DEC Pack Disk Engineering Change Order Log
A log of engineering change orders for the RK05 DEC Pack Disk drive. 		RK05
DECpc AXP150 and DEC2000 Model 300 AXP BIU Parity Errors Field Change Order
This document provides instructions for addressing BIU memory parity errors and machine check code 214 on DECpc AXP150 and DEC2000 Model 300 AXP systems. 		PB22H-CX-F001
DH11 Register and Byte Control
This document contains the Engineering Change Order log for the M7278 module, covering three specific change orders from 1973. 		M7278
Diagnostic Engineering Change Order
A collection of Diagnostic Engineering Change Orders (ECOs) documenting updates and patches for various PDP-8 diagnostic software. 		Form B
Disk Control Engineering Change Order Log M7255
An engineering change order log for the M7255 disk control module used in the PDP-11 family and PDP-15. 		M7255
Disk Power and Motor Control XX-C99A4-EA
Distinguishing Between Certain Characters Field Change Order
Field Change Order for replacing the font ROM in VT320 terminals to improve character readability in 132-column mode. 		VT320-I001
DMHUB-MB-0001 70-30820-01
DQS11-C DMA Controller Engineering Change Order Log
An engineering change order log documenting three modifications for the DQS11-C DMA controller. 		DQS11-C
DR11-B Maintenance Module
Field Change Order for the M9680 DR11-B maintenance module regarding a long time constant issue. 		M9680-D0001
DS5000 Model 240 and DS5900 Generate Erroneous Data Field Change Order
This FCO addresses a data integrity issue in DS5000 Model 240 and DS5900 systems caused by double precision floating point calculation errors. 		KN03-GA-0001
Engineering Change Order Log Card Reader
An engineering change order log for various card reader models containing technical modifications and installation notes. 		CRO4
Engineering Change Order Log DP11 Control
This document lists engineering change orders for the M7223 DP11 control module. 		M7223
Engineering Change Order Log G109 Control and Data Loops
A log of engineering changes (ECOs) and field change orders (FCOs) for G109 control and data loop modules used in PDP-11 and PDP-15 systems. 		G109
Engineering Change Order Log PDP-11 Family 360 MPX/SEL Channel to Unibus
An engineering change order log documenting various technical revisions and corrections for the DX11-B product. 		DX11-B
Extremely Slow Performance W/O Diag Failure Field Change Order
Field Change Order for PMAG-FB graphics options to resolve system performance issues caused by unhandled DMA errors. 		PMAG-FB-F001
Extremely Slow Performance without Diagnostic Failure Field Change Order
This document outlines a field change order for the PMAG-DB graphics option to address system performance issues. 		PMAG-DB-F001
Extremely Slow Performance without Diagnostic Failure Field Change Order
This Field Change Order addresses extremely slow system performance caused by unisolated DMA errors in the PMAG-EB graphics module. 		PMAG-EB-F001
Failure of TK50/TQK50 Subsystems Field Change Order 16-Bit Systems
This field change order outlines procedures for upgrading the TK50/TQK50 subsystem to resolve specific operational errors in 16-bit PDP-11 Q-Bus systems. 		TQK50-R002
Faulty Chip Resulting in Heavily Loaded Outputs Field Change Order
This document outlines a field change order for the VAXstation 3100 Model 76 to replace the KA43 System Module due to a faulty National Semiconductor 74F244 chip. 		KA43-0001
FCO Field Application Document (FA) 54-24508-01
FCO 10XXX-0001, Mem Config Restrict/Cache Err Correction Routine EQ-01694-01
FCO 2R-RZR6A-F001, Does not meet ESD standards 2R-RZR6A-AA
FCO 2R-RZREA-F001, Does not meet ESD standards 2R-RZREA-AA
FCO 51XXX-0001, Module mag indicators inadvertently set 23-327E9-00
FCO 58XMX-0001 (DAS) Rev B, Console code/parity logic/T1035 upgraded 50-19761-01
FCO 5900-0001, RZ57s in DS5900 systems experiencing SCSI bus hangs EQ-01670-O01
FCO 62XMX-1003, Inst of DWMVA requires 6000-2XX CPU upgrade 23-303E9-00
FCO 62XMX-F001, Replace cable Assy on European 6200 Sys per VDE regs 17-01567-01
FCO 62XMX-F002 (DAS), TK50 incompatibility problem (TBK50 cntrlr) 23-358E5-00
FCO 63XMX-1004, Inst of DWMVA requires 6000-3XX CPU upgrade 23-305E9-00
FCO 63XMX-F003 Rev C, Secondary proc fails RDB test, parity errors 23-188E9-00
FCO 63XMX-S002, VAX 6000 Embedded storage controls EQ-01563-01
FCO 64XMX-0002, T2015, T2015-YA and T2017 Module Replacement 21-25087-09
FCO 64XMX-1003, Inst of DWMVA requires 6000-4XX CPU upgrade 23-308E9-00
FCO 64XMX-S001, VAX 6000 embedded storage controls 70-26931-01
FCO 65XMX-1001, Inst of DWMVA requires 6000-5XX CPU upgrade 23-312E9-00
FCO 7XXX-F001, Capacitor in some blower assys may overheat/fail 12-35173-01
FCO 7XXX-F002, CCL module air pressure switch/Door catches 54-20300-01
FCO 7XXX-F003, Spares shipped prior to being FCC compliant EQ-01675-01
FCO 82XBX-M001 EQ-01469-01
FCO 82XBX-R002, Revision of the kernel to "B1" 21-20850-BB
FCO 83XBX-M001, BBU may activate, causing hazardous condition FQ-01469-01
FCO 85XBA-1003, Fusible resistor blows prematurely on power up. EQ-01460-01
FCO 85XBA-1004, Trip point, signal set for VAX 85x0 EQ-01461-01
FCO 85XBA-1007 Rev B, PC38N console problems EQ-01523-01
FCO 85XBA-1008, MS88-DAs on VAX 85x0 systems EQ-01518-01
FCO 85XBA-1009, Overvoltage fault in the H7187 reg EQ-01535-01
FCO 85XBA-F010 Rev C, Reliability of system recovery from brownouts. FA-04858-01
FCO 85XBA-R001, Retrofit VAX 8500/8550 to Rev level "B1" EQ-01450-01
FCO 85XBA-R002 Rev B, F1010 (CLK) module EQ-01452-01
FCO 85XBA-R005 Rev C, Shuts down prematurely because of temp sensor EQ-01470-O01
FCO 85XBA-R006, Retrofit VAX 85xx systems to rev "E1" EQ-01487-01
FCO 871BA-F005 Rev C, Corrects system recovery from brownouts. FA-04858-02
FCO 871BA-R002, Retrofit VAX 8700 to rev "C1" FA-04779-O1
FCO 882BA-1004, Unibus time out errors with VMS V5.0 19-22633-02
FCO 882BA-F007 Rev C, Corrects system recovering from brownouts. FA-04858-03
FCO 882BA-R002 Rev B, F1005 Address bit 23 causes cache prob. 19-22596-00
FCO 882BA-R003, Retrofit VAX 8800 systems to rev "D1" FA-04779-02
FCO 885BA-0001, μVAX Console fails to load μCode/diag into CPU EQ-01481-01
FCO 885BA-F002 Rev B, Memory box intermittently fails from pwr fail 17-02438-01
FCO 9XXX-0002, Build up of residue resulting in funct failures EK-KA901-MG
FCO 9XXX-0005, Failures of interconnect cables cause sys failures EQ-01618-O01
FCO 9XXX-0007, T1061 XJA module contention problem causing "hangs" FA-04957-01
FCO 9XXX-0008, ALPHA particle effects causing intermittent errors EQ-01623-01
FCO 9XXX-0009, Airflow/temp sensors register false trips 12-28780-05
FCO 9XXX-0010, Rev B Config of airflow/speed control & temp sensors 17-02756-01
FCO 9XXX-0011, ALPHA particle effects causing intermittent errors F6-P1018-AA
FCO 9XXX-0012, Caps difficult to assemble to buss bars, overheating... 54-21037-01
FCO 9XXX-0015, Rev B MCU Spares to be retested to ensure reliability. FA-04977-O01
FCO 9XXX-0016, Problems Related to Memory ECC Error Reporting EQ-01644-01
FCO 9XXX-F013, Noise on the module causes false error reports 54-17961-01
FCO 9XXX-S006, VAX 9XXX-4XX cabinets may tip when moved EQ-01622-01
FCO 9XXX-S014, 280 DC Wiring diagram error, potential safety hazard 36-36578-01
FCO A2150-0001, Bugs in Standard I/O Board 54-23146-01
FCO CI750-1005 Rev B, Cluster of 6 CI/HSC nodes on SC008 EQ-01454-05
FCO CI750-1006, VAXcluster node randomly rcvs incorrect data 23-121C6-00
FCO CI750-1007, The CIXCD requires LO118 or L0100 Min Rev E. EQ-01616-XX
FCO CI750-E1-1004 Rev B, Numerous functional errors,sanity timer FQ-01421-XXX
FCO CI780-F1-1005, Numerous funct errors ("arbitration timeout") et al FQ-01422-01
FCO CI780-R0D1, Funct problem in VAXcluster testing EQ-01344-01
FCO CIBCA-1001, CIBCA microcode inefficiency FA-04803-01
FCO CIBCI-I001, Numerous functional errors 23-310J5-00
FCO Customer Applicability Document 30-46980-02
FCO DEBET-F002 (DAS), Broadcast address prob w/Apple′s/MACs on net EQ-01536-02
FCO DEBET-F003 Rev B, HELLO messages w/SNAP header EQ-01646-01
FCO DEBET-I001, Nodes running RBMS, minor Microcode problems EQ-01479-O01
FCO DEBNA-R001, DEBNA UVAX machine-checks 23-250E6-00
FCO DEBNI-0001 (DAS), Problems using "Show" commands 23-562E6-00
FCO DEBNT-1001, New Firmware/Out of Sequence and Duplicate Packets. EQ-01444-01
FCO DECSK-AE-I001, DECSA-XX fused pwr cord fails (UK only) 17-00209-05
FCO DEFEB-F001, Fan circuitry malfunctions 54-19375-01
FCO DEMPR-R001, Shorted coax cable, self-test disabled EQ-01491-01
FCO DFMZA-1001, Composite link has problems w/error recovery 29-26246-00
FCO DFMZA-F002 (DAS), Composite link probs with flow control 70-20999-01
FCO DHW4X-F001, Failure on rev B03 DHW4X Logic Board 54-20662-01
FCO DM300-F001 (DAS), Composite link probs w/data compression 54-18590-01
FCO DMB32-F001 (DAS), System/Process Page Table Entry Access Violations 23-369E6-00
FCO DNSBX-0001, Potential for Electrical Short in the Transformer 30-36324-01
FCO DRB32-0002, Timing descrepancy with SYNCIN/SYNCOUT signals 23-1091L1-00
FCO DRB32-0003, Simultaneous intermittent timeout problems EQ-01542-01
FCO DRB32-0004, Corrects "hang" condition and adds a Word Counter. 23-022L5-00
FCO DRB32-0005, Problem during FAST DMA WRITE's to user device 19-21330-01
FCO DRB32-E-F001, Modules shipped with ECO implemented incorrectly. EQ-01680-01
FCO DRB32-I001, "USER DEVICE" connection to DRB32-W fail 23-088L1-00
FCO DS-173Q1-F001, Problem between Dispatcher cable & switched cable. EQ-01568-01
FCO DSRZA-F002 (DAS), Composite link probs w/flow control 70-24216-01
FCO DSRZC-F001 (DAS), Composite link probs w/data compression EQ-01579-02
FCO DWBUA-R001 Rev B, Current Ucode fails 23-314F4-00
Field Change Order Capacitor may overheat and fail
This document outlines an FCO for the VT420 terminal to replace a capacitor prone to overheating and address potential yoke cable connector issues. 		VT420-I001
Field Change Order Field Change Order
This document outlines the field change order (FCO) TU77A-M0007 for the TU77A magnetic tape transport, detailing installation procedures and parts lists. 		TU77A-M0007
Field Change Order K.STI microcode version 26
This document describes the procedure for upgrading K.STI microcode to version 26 on L0108-YB modules within an HSC50 node. 		HSC50-R007
Field Change Order Self-test prints out wrong revision on console
This document addresses the issue of self-test printing the wrong revision on the console and excessive Q-Bus activity on DECsystem 5500 modules. 		KN220-F002
Field Change Order for DEC 4000 Model 610 Field Change Order
Field Change Order (FCO) for replacing I/O module B2101-AA in DEC 4000 Model 610 systems to resolve parity errors and crashes. 		KN430-0005
Field Change Order for DECstation 5000 Model 200 System Modules
This document outlines an FCO for replacing 70-26722-02 system modules in DECstation 5000 Model 200 systems to resolve multiple hardware, firmware, and enclosure issues. 		KN02-AA-F002
Field Change Order for LN08 Light or No Printing
This document outlines the field change order procedure to resolve light or no printing issues on LN08 (DEClaser 3200/3250) printers. 		LN08-0001
Field Change Order for VAXBI Systems Using KDB50 Controller Field Change Order
This document provides instructions for updating the KDB50 disk controller on VAXBI systems to address data transfer errors. 		KDB50-R001
Field Change Order Instructions for Asr4x00 B3002 and B3004 CPU
Field Change Order instructions for resolving CPU hangs or slow-downs on AlphaServer 4000/4100 systems in OpenVMS V7.1 SMP environments. 		KN304-XX-F001
Field Change Order LN03 Font Management Problem
This document provides a rework procedure to resolve font management issues and margin violations on the LN03 printer. 		LN03-I001
Field Change Order: Monitor Loses Video Revision A
This document describes the field change order procedure to resolve video loss issues on DECstation monochrome monitors by replacing them with the B01 revision. 		PC4XV-F001
Field Change Order: Upgrade to Fix Data Corruption Problem Field Change Order
This document outlines a required firmware upgrade to T387 or higher for RF31T, RF35, and RF73 disk drives to resolve a potential data corruption issue. 		RF31T-0001
Filter Network Engineering Change Order Log
Field change order documenting the increase of capacitor voltage ratings for the G8000 filter network. 		G8000-C0001
Firmware and Hardware Problems on Current Revisions of KD560 Module Field Change Order
This Field Change Order (FCO) outlines the mandatory replacement of KD560 modules in VAXft model 810 systems to resolve firmware and hardware defects. 		KD560-0001
Firmware Bugs in V1.1 FCO VT340
Field Change Order for upgrading the ROM cartridge on VT330/340 terminals to version V2.1 to resolve firmware bugs. 		VT340-I001
Firmware Specification for Open Systems Environment Field Change Order
This field change order addresses firmware complexity and hardware stability issues for the DECstation 5000/Model 200 workstation and DECsystem 5000/Model 200 server. 		KN02-AA-0001
Firmware Upgrade for LA75X-SF Sheetfeeder Field Change Order
This document provides instructions for upgrading LA75 printer firmware to ensure compatibility with the LA75X-SF sheetfeeder. 		LA75-I001
Functions Microcode Field Change Order
Field Change Order for updating functions microcode on T2029-AB KZMSA modules. 		KZMSA-F001
Glare from CRT face Field Change Order
This document provides instructions for retrofitting VR260 monitors with antiglare treatment and repairing defective yoke connectors. 		VR260-I001
Ground Currents Cause System Errors Field Change Order
This document provides instructions for replacing the FEU (H7884-AA) in certain DEC 4000-6XX and VAXft Model 810 systems to resolve random system errors caused by high ground currents. 		KN430-0003
H740 Regulator Board Engineering Change Order Log
A log of engineering change orders and corrective actions for the H740 Regulator Board used in PDP-8, PDP-12, and PDP-11 family computers. 		5409728
Heads Become Offset Causing E9 & E25 Errors Field Change Order
This document provides the Field Change Order (FCO) procedure to correct an issue where RA70 disk drive heads become offset over time, leading to E9 and E25 errors. 		RA70X-I002
Intermittent Errors During Backup Field Change Order
This Field Change Order (FCO) addresses intermittent backup errors in TA81 tape drives by replacing three EPROMs on the STI interface module. 		TA81-F002
Intermittent Failures Due to Tape Positioning Field Change Order
This document outlines a field change order for TA90 TCUs to address intermittent tape positioning failures through updated formatter software. 		TA90-0001
Intermittent Load/Unload Problems and Operator Errors Field Change Order
This document describes a Field Change Order (FCO) to resolve intermittent load/unload problems and operator error issues in TK50 tape drives. 		TK50-I002
Intermittent NMI Errors When Reading From Floppy Field Change Order
Field Change Order (FCO) to resolve intermittent NMI errors during floppy disk reads on specific DEC2000 AXP systems by replacing the CPU module. 		PB22H-0001
Intermittent Position Lost and Serious Exception Errors Field Change Order
Field Change Order document addressing intermittent position lost and serious exception errors for TU81+ tape drives. 		TU81E-F001
Interprocessor Buffer, PDP-11 to Positive Bus
Engineering Change Order (FCO) documentation detailing modifications for the DA28-F Interprocessor Buffer. 		DA28-F
ISA Bus Network Adapter Cards Field Change Order
This field change order addresses marginal ISA bus signal integrity issues in Celebris 560, 590, and FP 590 systems. 		FR-830xx-0001
KB11-A Timing and Miscellaneous Control
This document is a log of engineering change orders for the M8105 module, which provides timing and control for the PDP-11/45 processor. 		M8105
KD11-B 16 Bit Processor Engineering Change Order Log
An engineering change order log for the KD11-B 16-bit processor, documenting updates to documentation, ROM listings, and microprograms for PDP-11/05 and 11/10 systems. 		KD11-B
KT11-D Memory Management Engineering Change Order Log
This document logs multiple Engineering Change Orders (FCOs) for the M7236 KT11-D Memory Management module used in PDP-11/40 and PDP-11/35 processors. 		M7236
LA30 Control Logic A Module Engineering Change Order Log
An engineering change order log for the M7711 LA30 control logic module containing seven entries from 1971 to 1972. 		M7711
LA30 Motor Drive Amplifier Engineering Change Order Log
An engineering change order log for the H605 LA30 motor drive amplifier, detailing various hardware and documentation corrections. 		H605
LAMB Module Addressing Modification Field Change Order
This field change order upgrades T2028-AA LAMB module field spares to revision E* to support lower address bit passage to the XMI. 		KN7AA-F002
Laserfeeders Problems Field Change Order
Field Change Order for LN03X-SF/SH laserfeeders to address random paper jams and synchronization issues. 		LN03X-SF/SH-F002
LG02 Printer Upgrade Field Change Order
This Field Change Order (FCO) outlines an upgrade procedure for LG02 printers to address Power Amp PCB failures. 		LG02-R002
LG02 Printer Upgrade Field Change Order
This field change order documents an upgrade for the LG02 printer series to address issues with font selection, panel lock-ups, and firmware hangs. 		LG02-F003
Line Printer Engineering Change Order Log
An engineering change order log for the LP01 line printer, detailing hardware and documentation modifications. 		LPO1
LN03S-XX Printer VAXmate Configuration Rework Procedure Field Change Order
This Field Change Order provides instructions to rework the LN03S-XX printer for compatibility with the VAXmate configuration. 		LN03S-I001
Long Arm HDA's Exhibit Hazing Condition Field Change Order
This document describes a mandatory field change order for RA90 disk drives to correct a potential hazing condition in long-arm HDAs produced before July 1989. 		RA90X-F003
LP02 Data Products Line Printer Engineering Change Order Log
An engineering change order log for the LP02 line printer listing various fixes and modifications. 		LP02
LPS32 Field Change Order Upgrade to correct minor software bugs
Field Change Order (FCO) documentation to upgrade LPS32 printer firmware to version B01 to address minor software bugs and support optional output trays. 		LPS32-F001
LQP45 Printer Field Change Order
This document outlines the Field Change Order (FCO) for the LQP45-B printer to address character interpretation, proportional mode, and country-specific issues. 		LQP45-I001
Memory Configuration Restrictions Field Change Order
This document outlines the procedure for upgrading E2056-CA/DA CPU modules to eliminate memory configuration restrictions in AlphaServer 8200/8400 systems. 		KN7CC-AA-0001
Memory Module Seating Improvement Field Change Order
This document outlines instructions for correcting memory module seating issues in AlphaServer 4100 systems. 		MS330-XX-F001
Microcode Does Not Handle Invalid/Illegal Commands Field Change Order
This Field Change Order (FCO) provides microcode update instructions for RA90 and RA92 disk drives to resolve issues with invalid or illegal commands causing system hangs. 		RA9X-F005
MicroVAX 3100 Firmware Upgrade Field Change Order
This Field Change Order (FCO) provides instructions for upgrading MicroVAX 3100 systems from V1.1 to V1.2 firmware to resolve several identified bugs. 		KA45/47-F001
Minor Software Bugs Field Change Order
This document addresses minor software bugs in LN08 and LN08R printer models by upgrading their firmware to Version 1.1. 		LN08-F002
Multi-purposed, firmware not booting supported devices Field Change Order
This field change order addresses multiple issues with Decstation 5000 Model 200 system modules. 		KN02-AA-F003
Paper Tape Reader and Punch Engineering Change Order Log
Engineering Change Order (ECO) log documenting design updates for the PC04 Paper Tape Reader and Punch. 		PC04-00057
Paper Tape Reader/Punch Engineering Change Order Log
This document logs engineering changes for the PC05 Paper Tape Reader/Punch, documenting modifications to drivers, materials, and fuse specifications. 		PC05
PDP-11/35 Basic Box Power Supply and Slides Engineering Change Order Log
A log of engineering change orders for the PDP-11/35 Basic Box power supply and slides, covering various technical improvements and corrections. 		BA11-D
Phase Encoded Formatter Control Engineering Change Order Log
Engineering Change Order (ECO) log for the TR07-F Phase Encoded Formatter Control for the PDP-11 processor. 		TR07-F
Potential Fire Hazard Caused by Capacitor Field Change Order
This document outlines a field change order to replace a potentially hazardous electrolytic capacitor in LXY series printer power supply assemblies. 		LXYXX-S001
Potential Problem in Early Revenue Version of CPU Chip
Field Change Order to replace the system module in AlphaStation 600 systems to address a branch misprediction problem in early 21164 CPU chips. 		KN20-AA-0001
Power Harness Cable Replacement Field Change Order Application
Field Change Order to replace defective Amphenol power harness cables in Prioris HX6 and ZX6 systems due to intermittent connectivity issues. 		DS-ZXHX6-XX-F001
Power-up self test writes in one location in NVRAM Field change order
This Field Change Order addresses potential NVRAM data corruption during power-up self-tests on DECsystem 5500 systems. 		KN220-0001
Powers off within a permanent false power supply Field Change Order
This document provides instructions for replacing CEAG power supplies (revision N or lower) in RA90 and RA92 disk drives to resolve power-off issues. 		RA9X-0006
Prioris LX5000 RTC FCO Application
Field Change Order document addressing CMOS setting loss in Prioris LX systems due to a Real Time Clock (RTC) circuit flaw. 		LX5XX-XX-0001
Problems in V1.0 VMB Firmware & V1.3 CPU Firmware Field Change Order
A procedure for replacing flash ROMs on the VAXft 810 I/O ATM module to upgrade to V1.1 VMB and V1.4 CPU firmware. 		FT810-0001
Problems with KFMSB Module Field Change Order
This document outlines the field change order procedure for resolving hardware and firmware problems in the KFMSB (T2029-AC) module. 		KFMSB-AA-0001
Recoverable soft errors, unrecoverable hard errors Field Change Order
This document outlines an FCO to resolve disk drive errors on various MicroVAX, VAXstation, and MicroPDP systems by replacing a specific interface cable. 		RQDX2-R001
Remote Data Terminal Engineering Change Order Log Revision 0
A log of engineering change orders (ECOs) for the RT02-A Remote Data Terminal. 		RTO2-A
Required Microcode Fix for ULTRIX Based System Field Change Order
This document describes the field change order (FCO) procedure for applying a required microcode fix to KDB50 DSA disk controllers in VAXBI systems running ULTRIX. 		KDB50-R002
Retrofit T1032 with T1034 Making DEBNT a DEBNA Field Change Order
This document outlines the procedure to retrofit T1032 modules to T1034 modules to upgrade DEBNT options to DEBNA options. 		T1032-R001
RK05 Retrofit Kit
Field Change Order for retrofitting the RK05 Disc Drive with air handling, capacitor bracket, head select, data reliability, and overvoltage improvements. 		RK05-00064
RK11-C Disk Control Engineering Change Order Log
A log of engineering change orders for the RK11-C disk control system, covering updates and corrections made from 1972 to 1973. 		RK11-C
RK11-D Data Paths Engineering Change Order Log
A log of engineering change orders for the M7256 RK11-D data paths module. 		M7256
RS64 AC/DC Low Sensor Engineering Change Order Log
A document listing engineering change orders for the G8002 RS64 AC/DC Low Sensor module for the PDP-11 family. 		G8002
RZ57 Disk Drive Write Faults Field Change Order
Field Change Order correcting a firmware bug causing unrecovered write faults in RZ57 disk drives. 		RZ57-F001
Scope Cable XX-986CD-9C
SCSI Controller Transaction Error Field Change Order Field Application Document
This document outlines a field change order for DEC3000 Alpha AXP systems to address a rare SCSI controller transaction error in low-temperature environments. 		KN16-AA-F001
Slow PostScript Printing Field Change Order
This document outlines a field change order to address slow PostScript printing on DEClaser 3250 printers by updating the firmware. 		LN08-F003
Smoke/Soot From Power Supplies Field Change Order
This document outlines the procedure for replacing the power supply harness in DEC 3000 AXP systems to address a potential smoke and soot issue. 		KN15-AA-0003
Smp Upgrade Field Change Order
This document outlines the procedure to upgrade DEC 4000 systems to multiprocessor (SMP) configurations by ensuring memory modules meet revision C01. 		KN430-F004
Spare Parts Compatibility and Interchangeability Issue Field Change Order
This Field Change Order (FCO) addresses an incompatibility between field spares and the LG04+ A01 printer, providing instructions to upgrade to B01 revision. 		LG04-F001
Startup Problem When Option Cards Installed Field Change Order
This document outlines the upgrade process for DECpos units (MT10A-AA/AB) to resolve startup issues when option cards are installed. 		MT10A-F001
System Firmware Update for RZ26L and RZ28 Drives Field Application Document KA47-F002
This field change order provides instructions for updating firmware to resolve issues where RZ26L and RZ28 drives are not detected by Microvax 3100 systems. 		KA47-F002
Systems Fail to Autoboot RA70 During Power Up Field Change Order
This Field Change Order (FCO) addresses issues with MicroVAX and VAXstation systems failing to automatically boot RA70 or RA90 drives after power sequences. 		KA650-F001-DAS
Systems with Multiple 32meg Samsung SIMMs Field Application Document
Field change order document for resolving boot and crashing issues on DEC3000 systems using specific Samsung 32MB SIMMs. 		KN16-AA-F002
TC11 DECtape Control Engineering Change Order Log
A log of engineering change orders (FCOs) for the TC11 DECtape Control system. 		TC11-LOG
TQK50 Q Bus Controller Modules
Field Change Order for TQK50 Q bus controller modules (M7546) to address memory corruption and other operational issues. 		TQK50-I001
TQK70 Controllers Fail to Boot Standalone Backup FCO TQK70-R001
Field Change Order to fix TQK70 controller boot failure issues during standalone backup. 		TQK70-R001
TSV05 Magnetic Tape Subsystem Controller Upgrade Field Change Order
This document outlines the procedure to upgrade the TSV05-Sx magnetic tape controller for optimal performance on MicroVAX 3300 and later systems. 		TSV05-I002
TU10 Magtape Control Engineering Change Order Log TM11
A log of engineering change orders (ECOs) and field change orders (FCOs) for the TU10 Magtape Control system. 		TM11
TU60 Read/Write and Servo Engineering Change Order Log
A log of engineering change orders and field change orders for the TU60 Read/Write and Servo system. 		M7761
TUK50 UNIBUS Controller Module Maintenance Field Change Order
Field Change Order for upgrading the TUK50 UNIBUS controller module (M7547) to resolve system hangs, errors, and software compatibility issues. 		TUK50-I001
TURBOchannel DMA Reads and Conflicted I/O Writes Field Change Order
This Field Change Order (FCO) addresses a system hang issue on DEC 3000 AXP Model 400/400S systems caused by TURBOchannel DMA and I/O write conflicts. 		KN15-BA-0002
Typesetting Punch Control Engineering Change Order Log
This document outlines engineering corrections for the PDP-11 family Typesetting Punch Control, specifically regarding M7821 module integration and UNIBUS connector print errors. 		PA611-P
Typesetting Reader Control Engineering Change Order Log
This document is an Engineering Change Order (ECO) log detailing connector and module modifications for the PDP-11 processor family. 		PA611-R
Unibus Interface for LPS11 Engineering Change Order Log
An engineering change order log for the M7015 Unibus interface board used in the PDP-11 family. 		M7015
Upgrade FS Stockroom Inventory of M7625-AA/BA Modules Field Change Order
This field change order directs the upgrade of M7625-AA and M7625-BA modules in Field Service stockroom inventory from revision B1 to C1. 		KA655-I001
Vector and Character Generator Control Engineering Change Order Log
This document is an Engineering Change Order (FCO) log for the M7013 Vector and Character Generator control module used in VT40 terminals. 		M7013
Video Display Interface Engineering Change Order Log
This document outlines engineering changes and rework procedures for the M7009 Video Display Interface. 		M7009-B0001
Video Module Field Change Order Implementation Instructions
This document provides instructions for a field change order to replace faulty video modules in AlphaServer 4100/4000 systems to resolve intermittent PCI data parity errors. 		PB2GA-JX-F001
Video Streaking on VR160 & VR290 Monitors
This Field Change Order (FCO) addresses and provides instructions to resolve video streaking on VR160 and VR290 monitors for specific VAXstation systems. 		VS40X-PA-F001
Videotex Emulation Problems Field Change Order
Field Change Order for correcting Videotex emulation and modem port issues on VTX20 terminals. 		VTX20-I001
VR14 Regulator Engineering Change Order Log
An engineering change order log documenting revisions and technical corrections for the VR14 regulator module. 		G836
Write Back Cache Batteries Field Change Order
This document outlines procedures for identifying and replacing faulty Write Back Cache batteries for various Digital storage controllers to prevent potential data loss. 		HSWBC-0001
Write Back Cache Batteries Field Change Order
This field change order addresses a manufacturing defect in write-back cache batteries produced in 1996 that can lead to data loss. 		HSWBC-S-0002
Write Back Cache Batteries Field Change Order
This document outlines the procedure to replace defective 1996 Write Back Cache batteries in HSZ20-based storage array controllers. 		HSWBC-S-0003
XP1000 NT4 – EV6 Field Change Order Instructions
This document outlines the upgrade procedure for XP1000 workstations to resolve incompatibility issues between EV6 V2.3 chips and Windows NT4.0. 		00-XP1000 F001
229 documents

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