Tuesday, November 5, 2019

Digging into load failure on Telex 8020 drive A

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STATUS OF AUTOLOAD ON DRIVE 1 When a threading attempt failed with the latest problem, it left the end of the tape down in the upper vacuu...
Monday, November 4, 2019

Repair work on logic circuits for drive B

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BROKEN COMPONENT FOUND ON CONTROL LOGIC BOARD AND REPAIRED Upon inspection of the control logic board I found that an engineering change w...
Sunday, November 3, 2019

Switching back to power supply in cabinet A for drive 1

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FINISHED WITH REPAIR OF POWER SUPPLY Having received the fuse holder to replace a damaged part, I could now use the power supply that came...

Restoring operation of Power Window on Telex 8020 drive A

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OVERVIEW OF POWER WINDOW IN DOOR The front door of the tape drive has a glass window that slides down under power to allow the operator to...
Friday, November 1, 2019

Ongoing diagnosis of load function for Telex 8020 drive A

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APOLOGIES - HAD TO SWITCH TO MODERATED COMMENTS Sleazebag spammers promoting services and goods have been relentlessly posting fake commen...
Thursday, October 31, 2019

Continuing diagnosis and repair of tape load on drive A of my Telex 8020 system

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VERIFYING VACUUM AT TAKE-UP REEL HUB I pulled the hose off the differential pressure switch for the take-up reel hub and held my finger ov...
Monday, October 28, 2019

Diagnosing failure in tape load operation in Telex 8020 drive cabinet A

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AUTOLOADING CARTRIDGE AND TAPE CARTRIDGE OPENER IBM introduced a feature on its tape drives, during the 360/370 era, where the operator on...