Tait Limited TEL0046 Betriebsanleitung

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Refer to the test points and options diagrams in Section 6 for test point locations, and to
the regulator fault finding chart (

) for fault diagnosis.

Check the 13.8V (TP601) and 9V (TP602) supplies at their test points in the regula-
tor compartment with a DMM.

Check the 5V (TP604) and 20V (TP603) rails at their respective test points in the
regulator compartment.

Check that Tx-Reg. (TP305 in the exciter compartment) comes up to 8.8V when the
exciter is keyed.

Check the +5V digital regulator output (TP607 in the regulator compartment).

Check for short circuits.

Key  the exciter.

Using a DMM, monitor the VCO control voltage at PL4-1 or the junction of L1 and
R1 on the VCO PCB.

If the synthesiser is locked and the VCO aligned, the voltage at this point should
be between 5 and 13V.

If the VCO is not locked, refer to the synthesiser fault finding chart (

).