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Yaesu FT-230R Problems [message #2991] Thu, 20 June 2013 00:09
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Yaesu FT-230R Problems
NO RF OUTPUT : The PA module is a common failure on this unit.

NO RF OUTPUT WHEN HOT : PA.

NO RF OUTPUT IN THE LOW POWER POSITION : Check the PA.

RF OUTPUT INTERMITTENTLY FALLS OFF : I have seen two or three cases where the PA has intermittently gone into oscillation. In both cases this was due to internal faults within the PA module. It should be noted that this oscillation can be sufficient to blank out a nearby TV, and this fault should be suspected if there is a complaint of TVI. It should also be noted that the PA continues to oscillate and draw current when returning to receive, and EVEN IF THE FRONT PANEL POWER SWITCH IS TURNED OFF.

NO AUDIO OUTPUT : Suspect Q07 - the audio o/p IC.

MUFFLED AUDIO ON RX : Note there is an internal tone control (VR1001) on the main PCB. A lot of people don't know it's there.

OFF FREQUENCY TX AND RX : If this is only slight then align the PLL. If the error is significant then the local osc xtal should be checked.

BADLY BROKEN UP ON TX+RX : Check X03 (5.76MHz) in the PLL.

ERRATIC TUNING : Tuning step switch.

144-148MHz OPERATION : On the micro board there are spaces for four small tinned copper wire links next to each other. In normal UK versions, two links, J1 and J4 are made. Cut J1.

S-METER READING FALLS OFF AS UNIT WARMS UP : See Yaesu mod sheet.
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