Elecraft K60XV Manual - Manual (Page 20)

20
Troubleshooting
i
If your specify problem is not covered below, re-check component values, diode and IC
orientation, and look for soldering problems (bridges, leads not soldered, cold solder joints).
If the S-meter shows full scale and the receiver is always muted: The coax cable on the bottom of the
board may be connected to some pin other than pin 6 on J13.
If the 60 meter band is not available between 80 and 40 meters, or if you see I N F O 0 8 0 on the
LCD: You may have the K60XV module plugged in incorrectly at J13 (8-pin connector). If not, you could
have a problem with the microcontroller on the K60XV (U1). Unplug the K60XV module and examine U1
closely for bent pins or pins not inserted into the socket. Make sure U1 is not plugged in backwards, and
that you have the correct values of R1 and C12 installed. Also examine Z1 for possible heat damage.
If signals on 40 and 60 meters can be heard, but are distorted or can't be tuned in using the VFO:
Verify that C71 on the RF board has been replaced with a 120 pF capacitor. Also check for correct values
and proper installation of R29, D19, and D20 (on the bottom of the board if your K2 s/n is 2999 or lower).
If L30 on the K2 RF board cannot be adjusted so that the VCO voltage is in the 1.5-7.5 VDC range
on all HF bands: Use the troubleshooting information given in the previous item (C71, D19, D20, etc.).
If you can hear signals on all bands except 40 and 60 meters: You may have the K60XV module
plugged in incorrectly at J15 (3-pin connector). Also look for shorts around P2 or K1 on the K60XV.
If the K60XV cannot reach 10 watts on 40 or 60 meters (KPA100 bypassed or not installed): The 40-
m band-pass filter inductors or 60-meter trim caps may not be aligned correctly, or you could have an
incorrect value capacitor at C2-C6 on the K60XV board.
If the KPA100 draws excessive current when used on 60 meters: Make sure you have not accidentally
selected the KPA100's unmodified 80-meter low-pass filter for use on 60 meters (see the D 1 9 menu
discussion at the end of the paragraph, Using the KPA100 on 60 meters). Also, verify that your KPA100
includes recent changes required for operation on this band as described on page 2.
If the low-level XVTR OUT signal is too low in amplitude (< 1 milliwatt into 50 ohms): Re-peak the
band-pass filter for the I.F. band in use. Also check D1 and D2 on the K60XV board, as well as other
components in the low-power path, for correct value and proper orientation.
If the bargraph or LCD power display do not read properly during low-power transverter use:
Check the installation of the coax cable on the bottom of the RF board, as well as D1, D2, and all
transverter ALC detector components on the K60XV PCB. Avoid using POWER settings under 0.1 mW.
If the K60XV module has been removed, and the K2 does not receive or transmit on 40 meters or on
all bands: Having removed the K60XV, you must reconnect the RF path on the K2 RF board: (1) insert a
4.7-pF capacitor into pins 1 and 3 of J15; (2) insert a jumper between pins 3 and 5 of J13. Leave D19, D20,
and the other added components in place, and leave the D 1 9 menu entry set to Y . The 60-meter band and
low-power transverter I/O will no longer be available, but the K2 should otherwise function normally.
If SSB power control malfunctions with transverters: KSB2 revision 1.07 or later firmware is required.