6
5.
If digital display does not count: Make sure DH is not"ON."
6.
If there is no DG display: Make sure you are not inREMOTE VFO with no
remote VFO attached.
7.
When intermittant in any circuit:
a.
Check for loose black jumper from point to pointon circuit board.
b.
Check for broken foil path.
c.
Check for component that has been pulled out or loosely soldered.
d.
Check for solder splash across foil path.
e.
Check for loose pins.
f.
Check for component leads touching to metal IF cans.
g.
Check for wire not soldered at function switch orat any switch or control.
h.
When checking FET's, check for excessive voltageat can top usually
source, or same G-1, G-2 voltage.
i.
Check for loose Molex mini connector or any foreign substance on pins.
8.
Complaint of frequency shift when TX-CW: This is normal. 800 Hz.
9.
Not proper PLL action: Make sure PLL slide switch isin NOR not TUNE.
10.
Receiver audio self oscillation at high level: Make sure audio board mounting
screws are tight.
RECEIVER
1.
Low audio output receiver sensitivity and no transmit: -6v supply is bad. Q13 on
FIX VOX unit.
2.
25 kHz calibrator will not zero: Add 3 pf in parallel with TC-1 on the marker
unit.
3.
Receiver sensitivity down: Q2 on RF unit. +9v on PD unit is shorted. L-6
shorted to ground.
4.
Intermittant receive when moving set.: Check for touching terminals at final
relay socket.
5.
No receiver or digital: 14v wire pinched between DG-1 chassis and ground.
6.
Receiver sensitivity 40 db down: Check for shorted L8, 1.8 MHz antenna coil on
coil pack.
7.
Adjacent signal interferance: See TKC bulletin.
8.
No receive audio: Check for shorted TA-7201P module at X49-1080-00.
9.
Poor receive audio: The 100 V AC 120 V taps were miswired.
10.
Receiver doesnt work 20-40: Check for wafer touch to ground on band switch.
11.
No DG1, no RX, no TX, no VCO: Bad D1 5 volt zener on relay unit.
12.
RIT action seems warbly: See TKC bulletin.
13.
Receiver has bad static and is noisy: Bad C14, C15, tantalum on PD unit.
14.
VFO frequency shift: Check for loose tension of VFO tension spring.
15.
USB/LSB will not work: Check for loose connection at C18 CAR-1 unit.
16.
Intermittant audio: Check for loose mounting screws on audio board.
TRANSMITTER
1.
Mushy audio on transmit: Mic amps Q20 and Q21 on IF unit are bad.
2.
No 14V supply: Bad bridge diodes D8-D10 on X43-1090- 02.
