Heathkit SB-104 - Converter Circuit Boards

Converter Circuit Board
TROUBLESHOOTING CHART
QUAN- TYPE HEATH
DIODES
TIT? PART NO.
D851
-D854 4 IN2071 57-27
TRANSISTORS
Q851, 0852 2 MPSU05 417-224
I
SYMPTOM
Output voltage low.
No output voltage.
POSSIBLE CAUSE
1. 0851,0852. T851.
2. 5 volt input low.
1. No input voltage.
2.
0851,0852. T851.
3. D851 - D854.
4. C851 - C857.
5. Solder bridge on board.