Citizen GSX-190 Service Manual Page 238

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PN 4237242C
A.2-2
QUICK REFERENCE INFORMATION
SWITCH SETTINGS, JUMPER SETTINGS AND TEST POINTS
DRA Card
Hgb Preamp Card
Test Points
TP1 - orange, output
TP2 - black, ground
Linear Power Supply Card
Jumpers
Test Points
Table A.2-3 DRA Card Jumper Settings
Jumper Description MD II Setting
X4 Sets card for IRQ11, needed for DRA1
Sets card for IRQ12, needed for DRA2
1-3
2-3
X5 Sets card to DRA1 or DRA2 ON - DRA1
OFF - DRA2
X6 Connects oscillator to circuit when jumped ON
Table A.2-4 Linear Power Supply Card Jumper Settings
Jumper Description MD II Setting
X1 Used to provide grounding for testing the card outside the unit. OFF
X2 Used to provide grounding for testing the card outside the unit. OFF
X3 Used to provide grounding for testing the card outside the unit. OFF
Table A.2-5 Linear Power Supply Card Test Points
Test Point Supply
TP1 +240 Vdc ground
TP2 +240 Vdc
TP3 -15 Vdc ground
TP4 -15 Vdc
TP5 +15 Vdc ground
TP6 +15 Vdc
TP7 Hgb LED cathode (negative lead)
TP8 Hgb LED anode (positive lead)
TP9 RBC aperture voltage
TP10 WBC aperture voltage
TP11 Aperture zap voltage (200 V)
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