Theory of Operation
ECO 422
4–7
a negative voltage. Since the peak detector will never produce a negative voltage,
the comparators will be disabled.
Power is supplied to the Main and Connector boards through J21 from an OEM
supply which pr15 V, –15 V and +5 V logic level voltage. The 15 V
supplies are regulated to +5 and –5 V. The +15 V is reduced by 22
W
resistors
and then used directly by the relay.
NOTE
. There are two fuses in the instrument. One is accessible through the rear
panel and the other is on the power supply. Make sure to check the internal fuse
if the instrument will not power up.
Post Regulated Power
Supply
Summary of Contents for ECO 422
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Page 14: ...General Safety Summary viii ECO 422 ...
Page 16: ...Service Safety Summary x ECO 422 ...
Page 17: ...Getting Started ...
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Page 31: ...Operating Basics ...
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Page 41: ...Operating Basics ECO 422 2 9 Figure 2 6 Setup for Adjusting R265 the User Level for SX 7 ...
Page 43: ...Specifications ...
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Page 53: ...Theory of Operation ...
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Page 62: ...Theory of Operation 4 8 ECO 422 ...
Page 63: ...Performance Verification ...
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Page 84: ...Performance Verification 5 20 ECO 422 ...
Page 85: ...Adjustment Procedure ...
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Page 88: ...Adjustment Procedure 6 2 ECO 422 ...
Page 89: ...Maintenance ...
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Page 101: ...Options ...
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Page 104: ...Options 8 2 ECO 422 ...
Page 105: ...Replaceable Electrical Parts ...
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Page 140: ...Replaceable Electrical Parts 9 34 ECO 422 ...
Page 141: ...Diagrams Circuit Board Illustrations ...
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Page 147: ... ECO 422 Changeover Unit FRONT PANEL 1 ...
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Page 167: ...Replaceable Mechanical Parts ...
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Page 174: ...Replaceable Mechanical Parts 11 6 ECO 422 ...
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Page 176: ...ECO 422 A1 FIG 1 EXPLODED VIEW A2 A3 A4 ...
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