Sailor COMPACT HF SSB T2130, Техническое руководство

Страница: 60 / 138

3 SERVICE T2130
PAGE 3-6
3.4.2 OUTPUT FILTER (MODULE 2)
3.4.2.1 ERROR 71. VFORWARD LOW
3.4.2.2
Check if the error comes up on all frequencies (one in each filter). Fault is probably in relay RE14-2 or
in the cabling from module 2 to the Connection Board (6).
If the error only comes up in one filter, check the input/output relays (eg. RE01-2, RE07-2), and then the
filter capacitors.
3.4.2.3
Check of the Vforward detector.
Select service programme SP-29, see chapter 3.9.
3.4.2.4
Measure the RF-output voltage on the Connection Board (6) with an oscilloscope approx. 200 Vp-p.
Then check the DC voltage on U01/1 pin 1 approx. 6.5V.
3.4.2.5 ERROR 78. INTERNAL SWR TOO HIGH
3.4.2.6
Check R27 and R28 (the power resistors to the left of module 6) with an ohmmeter value 50 ohm ±10%.
3.4.2.7
Check relay RE14.
3.4.2.8 ERROR 73 AND 75
Connect a 50 ohm load to the output terminal on the Connection Board (6).
Select service mode SP-29, see chapter 3.9.
3.4.2.9
Check Vforward U1 pin 1 approx. 6.5 V
Vreverse U1 pin 7 approx. 10.5 mV.
3.4.2.10
IF Vforward and Vreverse are ok. Then the fault is in TX-Processor (3)