TECHNICAL BULLETIN INDEX
                           Sorted by Bulletin Number
                                   06/25/86

  No.      Catalog  Description                                       Rev. Date
===============================================================================
HD:001     26-4150 Switch and jumper positions for interface board.    11/29/82
HD:002     26-4150 Wrong value pot, R3, on controller board.           11/29/82
HD:003     26-4150 Correct shipping procedure.                         11/29/82
HD:004     26~4150 Prevent erratic operation - schmitt trigger.        11/29/82
HD:005     26~4150 How to install secondary drive.                     03/06/84
HD:006     26~4150 Prevent stepper motor from getting lost.            11/29/82
HD:007     26—4150 Mislabeled connector causing drive not ready.       11/29/82
HD:008     26-4150 Write protected drive after service.                11/19/82
HD:009     26-4150 Random and intermittent hard drive problems.        02/O4/83
HD:010     26-1130 RS—232 problems with hard drive connected.          04/25/86
HD:011     26-1130 Jumper differences between 12 and 5 MEG drives.     06/01/83
HD:012     26-4152 Insure proper level of interface signals.           01/02/86
HD:013     26-4150 8/12 MEG - How to decode XENIX hard disk errors.    09/09/83
HD:014     26-4150 Hard Drives - Arrangement of tracks and cylinders.  03/19/84
HD:015     26-4152 Reduce temperature drift of VCO.                    11/30/83
HD:016     26-6006 15 MEG internal controller board alignment.         12/05/83
HD:017     26-4150 Shielded cables for random problems.                12/28/83
HD:018     26-4152 False triggering of CTC chip modification.          12/19/83
HD:019     26-6006 Modification to improve interface signal integrity. O1/26/84
HD:020     26-4152 Mandatory modification to correct VCO failures.     02/07/84
HD:021     26-4152 Acceptable WD1010 and WD1100 combinations.          07/09/85
HD:O22     26-5104 Model 2000 Hard Drive alignment procedure.          03/22/84
HD:023     26-4152 Modification for write data pulse.                  04/19/84
HD:024     26-1130 Power supply going into current limiting mode.      03/11/85
HD:025     26-1130 Motor speed alignment 5 wire connection points.     08/07/85
HD:026     26-1l30 Specifications for brake assembly.                  04/18/84
HD:O27     26-6006 Correct drive select problem with external drives.  04/19/84
HD:028     26-4152 Reduce occurrence of "Active Drive Not Ready".      05/21/86
HD:O29     26-4152 Identify hard disk bubble types.                    04/30/85
HD:030     26-4155 Ready lamp connection on WD1010 controller boards.  06/27/85
HD:031     26-4155 Proper connection of INDEX J5 on 10 and 15 MEGS.    07/16/86
HD:032     26-4155 Conversion of oxide media PCB to plated media PCB.  08/03/84
HD:033     26-4155 XFERRQ* signal going to wrong pin on bus.           08/22/84
HD:034     26-4155 Eliminate WAIT* from WD1010 being pulled down.      09/07/84
HD:O35     26-4155 Ext. WD1010 PCB not allowing secondary to power up. 10/l5/84
HD:036     26-4155 PAL change for WD1010 controller board.             11/14/84
HD:037     26-4171 Grounding differences with Tandy & Astec supplies.  O3/Ol/85
HD:O38     26-4171 Connecting wire harness to 35 MEG drive logic PCB.  06/22/85
HD:039     26-4152 Effects on HD Controller with cables upside down.   08/21/85
HD:040     26-1138 Describe the external hard drive ctlr for Model 4.  03/21/86
HD:O41     26-4173 70 MEG hard drive.                                  07/15/86