GE AMX-II

GENERAL ELECTRIC MEDICAL SYSTEMS AMX-ll X-RAY UNIT
7-1576 SM AO654E
2-2 Turning Off Battery Charger
When battery voltage is 130 the base emitter voltage for 441Q7 (8,C) will turn it on. The voltage across
4A1R9 will turn on 4A1010 and pick up relay 4A1K23 (7,D). Contact 4A1K23-B (5,E) will close, re-
ducing current to the gate of control SCR 4CR3 (5,B) and stopping the charging operation. Contact
4A1K23-A (8,F) opens to increase the emitter base voltage of 44107. Consequently the battery will
not charge again until it has discharged about 3 volts below the charge complete point.
SUMMARY OF CIRCUIT CONDITIONS
CHARGING CHARGE TERMINATION
1. 4A1Q7 is off 1. 4A1Q7 turns оп.
2 4A1010 is off. 2. 4A1Q10 turns on.
3. 4A1K23 is de-energized. 3. 4A1K23 is energized.
4. 4CR3 is ON、 4. 4CR3 is OFF.
5. “Charge On” light is on. 5. “Charge On” light is off.
6. “Charge Complete” lamp is off 6. “Charge Complete” lamp is on.
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