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7.3 Faultfinding
Although detailed faultfinding is not done at the user's level, it is a
simple matter to determine whether a fault lies in the teleprinter or in
the crypto module.
1. Gain access to the main electronics board of the teleprinter and
identify the three connectors for flat cables, located on the left-
hand side of the board; the centre connector is empty.
2. Transfer the grey flat cable from its normal position in the rear
connector to the empty connector in the centre.
3. Disconnect the other flat cable.
The crypto module is now bypassed and the teleprinter can be tested alone.
7.4 Options
Optional features incorporated for use at the user's discretion are listed
in figure 2. They are selected by placing U-links over the appropriate
pins on the interface board in the crypto module, as shown in the figure.
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