SB-060 TS-120 Repair Notes 12-18-79 Symptom Repair No CW, No Audio Sidetone oscillator Q25 on AF GEN unit 2SC1815 Receiver Sens Down T1, L34--696-35 on RF unit Shorted Analog Dial Cal OFF Mechanical Adjustment Carrier in SSB RF unit D2 and D3 shorted see TKC Service Bulletin Loss of Digital Check P5/J5 on Carrier Unit Smoke at Final Unit Check for long eds of wire shorted to case inside final unit also burned L10 and L11, L40-1011-04 (100uH) SSB Audio bad IF shift control turned max CW Power on Meter Max The RF gain control was turned max CCW VFO freq drift Replace the TEMP comp CAP C17 TX Audio BAD Check the Carrier Point adjust and make sure final bias is set to 150 Ma PLL digital NG Check D15 PLL unit High IC in RX Check the Final transistors 15 Meters only The BCD rotary band switch has a broken wafer. RX TX only 10M The BCD divider Q16, 74LS163 on PLL unit bad. Check the BCD inputs against the pin 2 frequency. 28.5 HF Osc Check ground screws and tighten at Relay Unit X41- 1250 No CW Filter Solder short across pins 1-2 J29 IF Unit No RX After the CW filter was installed the pins were not cut off shorting the signal to ground. Analog dial off Perform VFO tracking adjustment at 50 and 450 TX out 40M only 40M 50W and 10M 10W bad finals No 15M Core on the VCO transformer for 15M broken 3.5 and 7 Band same Shorted trace at Band switch under IF unit Low RF out All bands, Q12 SN16913 on AF gen unit, 2SK19GR bad No TX all bands L25 open on the RF unit Small gree inductor No digital no TX Q12 mixer on the PLL unit bad No RX no digital Q26 mixer on PLL unit bad INtermitt SSB AUdio Pin 5 of J5 on AF GEN unit loose No key or TX D26 and Q24 2SA562 on AF gen unit bad No TX R8 220 ohm at key jack burned open. Make sure customer uses shielded line on CW KEY. 15M osc. On 15M band only with antenna HF oscillation when first speaking. Install Ferrite bead on base of first mic amp Q18 AF GEN UNIT. No TX Loss of AVB Voltage at RF unit. Check Q9 2SA473 on the filter unit, also check 6 volt Zener diode. JEB/yn (c) 8979TKC