Service manual

Page 9
Pin Voltage Mode ModeCommands
JP7(left) 1.4V
Transmitter
keyed

Q3base(leftpin) 1.2V
Transmitter
keyed
Q3emitter(rightpin) 0.4V
Transmitter
keyed
Q3collector(centerpin) VCC 
R21,C9orC133(top) 9.5V
CWUSB,CWLSB,
FM
md3;md7;md4;
Transmitter
keyed
Q4collector
VCC 
(centerpinon2SC1969)
Q5collector
VCC 
(centerpinon2SC1969)
R42(top) 5.0V
Transmitter
keyed
R42(top) <0.7V
Transmitter
keyed

(Keydownin
CWmodes,PTT
pressedin
phonemodes)
D3cathode 4.3V
Transmitter
notkeyed
D3cathode(squarepad) <0.7V
Transmitter
keyed

(Keydownin
CWmodes,PTT
pressedin
phone
modes)
ToprightpinonK2 <0.8V Freq<2MHz fa00001800000;
ToprightpinonK4 <0.8V Freq2‐6MHz fa00003500000;
ToprightpinonK6 <0.8V Freq6‐12MHz fa00007000000;
ToprightpinonK8 <0.8V Freq12‐20MHzfa00014000000;
ToprightpinonK10 <0.8V Freq20
‐30MHzfa00021000000;