Service manual

RC2000 Service Manual Chapter 2 Theory of Operation 19
Research Concepts, Inc; 10679 Widmer; Lenexa, Kansas; USA 66215 WWW.RESEARCHCONCEPTS.COM
Drive Polarity on J2
output terminals
Command Azimuth FETs Elevation FETs
AZ1 AZ2 EL1 EL2
AZ_East Q1=off,Q2=on,Q3=on,Q4=off Q5=na,Q6=na,Q7=na,Q8=na +V 0V 0V 0V
AZ_West Q1=on,Q2=off,Q3=off,Q4=on Q5=na,Q6=na,Q7=na,G8=na 0V V+ 0V 0V
EL_Up Q1=na,Q2=na,Q3=na,Q4=na Q5=on,Q6=off,Q7=off,Q8=on 0V 0V 0V V+
EL_Down Q1=na,Q2=na,Q3=na,Q4=na Q5=off,Q6=on,Q7=on,Q8=off 0V 0V V+ 0V
“Brake”
Mode
Q1=off,Q2=off,Q3=on,Q4=on Q5=off,Q6=off,Q7=on,Q8=on 0V 0V 0V 0V
2.3.6 Parts List
The parts list for the RC2000 drive board is as follows:.
Bill of Materials…AZELDRV2.S01
Quantity Type Value Ref. Designators
8 IN4742 IN4742A D1,D10,D2,D3,D4,D7,D8
1 BREAKER W28-XQ1A-12,P&B CB1
1 BRIDGE
RECT
MB354W BR1
1 CAP .039uF C1
3 CAP .1 C10,C7,C8
4 CAP .039 C3,C4,C5,C6
1 CAP 10 C9
4 DIODE IN4002 D12,D13,D5,D6
1 CONNECTOR IDC2X8 J3
1 VOLTAGE
REGULATOR
LM317TB VR1
1 OP-AMP/
COMPARATOR
LM613 U3
6 MOV V68Z10 V1,V2,V3,V4,V5,V6
2 MOV 68-14m V7,V8