Labels:book | chat room | earth | monitor | reckoner | sky OCR: KENWOOD ASB-1058 Service Bulletin Amateur Radio Division Subject: TM- 455AVE Change in Pin Diode Date: May 1994 Symptom: Some early versions of the TM-455A/E have been discovered with bad solder connection at the final module pin diode D601 If the impedance of this device is too low the power consumption for this device goes UP This increasec power consumption might cause excessive heating of the solder connections ano may result in failure of the connection(s) after FM transmissions Countermeasure: On the TXXI unit replace D601 with a UM9401, change R606 to 100 ohms change C623 TC DF and C624 to After replacing these parts, readjust the NULL and Protection circuit using the procedures provided in the Service Manual Parts Required: Qty Description Part No Circult Description Pin diode UM94 ...
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