Heathkit SB-220 - Troubleshooting Chart

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TROUBLESHOOTING CHART
DIFFICULTY
1. No AC power
2. Meter inoperative in
one position:
A. GRID.
B. REL. PWR.
C. HV.
3. Meter circuits
inoperative
4.
Idle current over
.I 5A in CWITUNE
position.
5. No idle current
6. No high voltage
7. Relay will not activate
8. Final tune has no
effect
POSSIBLE CAUSE
A. Circuit breakers open.
B.
Jumpers missing on terminal strip AE.
C.
Terminal strip AE wired wrong.
A. Resistor R 1, R3.
B. D17, R25, R24,
C54, R26.
C. R6, R7, R8, R9.
D. Meter switch.
A. Meter jumper wire not
removed.
B. R2, C3, C8.
C. Meter switch.
A. ZD1.
A. Relay.
B. ZDI.
C. v1
- v2.
A. Dl -D14.
B. C10-C17.
C. R12- R19.
D. TI.
E. R1 or R3.
F. C29.
G. Top cover off (interlock).
A. D16.
B.
a.
C. Ant-Relay jack.
D. T2.
E. RL-1.
A. Bandswitch wafer #2
180 degrees out of position.
B. L7 installed wrong.
C. Improper load on the
Linear Amplifier.
D. V1, V2.