Heathkit SB-1000 - Page 64

Heathkit
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67
TROUBLESHOOTING CHART (Cont'd)
No high voltage.
None of the meter lamps light. 1. Lamps PL1 through PL4.
2. Bridge rectifier D201.
1, Diode D301 through D310.
2. Capacitor C401 through C408.
3. Resistor R405 through R409 or A441 through R413.
4. Coil L401
5. Choke RFC3.
6. Parasitic choke PC1.
Relay K1 does not activate. 1. OPR/STBY switch SW1.
2. interconnection to exciter.
3. Resistor R3.
4. Relay K1.
Plate contral has no effect. 1. Band switch SW2A, B, C, D, or E.
2. Coil L7 or L8.
3. Capacitor C26, C28, or C29.
4, Variable capacitor C27.
No RF output.
ALC inoperative.
Amplifier is hard to drive.
1. Relay K1 wired wrong.
2. Coil L7, L8, or L9.
3. Coaxial cable between Band switch and relay K1.
4. Band switch SW2A, B, C, D, or E.
5. Variable capacitor C31.
1. Interconnection to exciter.
2. Setting of control R2.
1, Cables to input filter chassis are interchanged.
2. Band switch SW2A, B, C, D, or E.
3. Coils L1 through LS.
Plata current does not increase with added drive power. 1. Exciter and Amplifier are set to different bands.
2. Band switch SW2A, B,C, D, or E.
8. Coils L1 through L6.