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1990-10-14
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625b
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26 lines
SB-903
TR-2600A PLL Unlock 1-14-86
Some cases of PLL unlock on the TR-2600 may be caused by a failure of the
crystal oscillator circuit X2, X3, and Q13. This may be corrected by
performing the following changes.
On the TX unit (X56-1470-10)
Replace diodes D13 and D14 (MA856) wit a series pair of BA282 diodes. Also
change resistor R54 to 47 ohms.
Parts required:
BA-282 diode 4 each.
47 ohm chip resistor (RD73FB2A470J) 1 each
This change is applicable to serial numbers before SN 702XXXX.
Time required for this modification is 1 hour or less.
CLM
(c) 121589TKC