Instructions to Convert IBM PCjr Color Monitor to Standard DB9 Connector
Jump to navigation Jump to search
Instructions to Convert IBM PCjr Color Monitor to Standard DB 9 Connector Pin out for the IBM PCjr Color Monitor cable is: A1 EMPTY -Vertical Sync A2 Violet Logic Ground A3 EMPTY -Horizontal Sync A4 Dark Blue Blue (color) A5 Dark Red Red (color) A6 Orange Intensity A7 Green Green (color) A8 EMPTY Composite Sync A9 Gray Shielded Audio (white audio - high) B1 Yellow +Vertical Sync B2 EMPTY Logic Ground B3 Brown +Horizontal Sync B4 Lt.Red & Clear Reserved B5 Lt.Blue Logic Ground Black & Lt.Grey B6 EMPTY B7 EMPTY B8 Shield from A9 Audio (shielded ground) B9 Bare Wire Shielded Ground (Braided down entire cable) Refer to pages 2-82, 3-83, 3-93, and B-29 in the IBM PCjr Technical Reference Manual. Please note that on page 3-83, the view is from the rear of the connector. The pictorial appears to be viewing from the front. Please note: The schematic for the IBM Color Display on page B-29 is NOT the IBM PCjr Color Monitor. It is the IBM Color Display. There is a difference! This is just for reference. Cut the end of the cable off the IBM PCjr Monitor. Carefully remove the outer insulation and pre-tin these wires: Lt. Blue, Black, Lt. Grey, Dk. Red, Green, Dk. Blue, Orange, Brown, and Yellow. Tin the outer braided jacket close to the cable. Cut the braided wire close to the cable, leaving about 1/4". Solder a short length of insulated wire to it. This is to keep the large braided cable from causing shorts in the connector. You will have four wire that you do not connect. These are a Grey shielded Audio cable, a Lt. Red or Pink wire, a Violet or Purple wire, and a Clear wire. Fold the four wires back along the cable and place a piece of heat shrink tubing on them. Purchase a DB-9 Male plug with a shielded hood. Solder the wires as follows: DB-9 Male Color of the PCjr Monitor cable From 1 Bare wire or shielded jacket B9 2 Lt. Blue, Black, & Lt. Grey B5 3 Dk. Red A5 4 Green A7 5 Dk. Blue A4 6 Orange A6 7 No Connection 8 Brown B3 9 Yellow B1 Place the hood on the DB-9 connector. You are now ready to test the monitor. No warranty is given to these instructions. This has been done to 3 IBM PCjr monitors with success.