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Tape Threads Successfully But Fails To Load In Columns; Window Fails To Open After Unload Operation; Channel Fails To Select Tape Unit (Device Switching Or Two-Channel Switch Feature Installed) - IBM 3803 Manual

Magnetic tape subsystems subsystem description
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2. Rewind Procedure - Without Cartridge:
Do (b) of step 1. Unload tape unit when rewinding is complete.
Tape Threads Successfully, But Fails to Load in Columns
Check for missing
BOT
marker, or incorrect leader length. Tapes with more than
30-foot
(9
m) leaders may not load reliably.
If
BOT
marker is present and leader
length is correct and tape fails to load in columns, notify
CE.
Window Fails to Open After Unload Operation
1. Open access door and manually wind remaining tape onto file reel.
2.
Close front door and press
RESET
and
UNLOAD.
3.
Notify
CE.
Channel Fails To Select Tape Unit (Device Switching or
Two~Channel
Switch Feature Installed)
Check that toggle switches on the appropriate 3803 operator's panel (Figure 10)
are set to enable selection of the desired tape control and tape unit. (Refer to
"3803 Operator's Panel, Toggle Switches." )
Section 3: Subsystem Operator Functions
31

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