Alpine Ai-NET CHA-1214 Service Manual page 13

| CHA-1204
Servo Monitor (Part No. 01E20845S01)
1. Purpose
CHA-1204 performs digital signal processing in the inside of Super 1 chip LSI.
The outside alignment circuit builds into this LSI. Each alignments are automatic.
This DT Mechanism Servo Monitor is a jig for the automatic alignment circuitry.
Please refer to the following list for the reference;
1. LED indicates the alignment.
2. Diagnosis of automatic alignment.
3. LED indicates a failure item for easy failure analysis of servo circuitry.
External View
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LPS VALUE
* The numbers of the automatic alignment sequence.
ll. Connection Points and Connection Method
Main P.C.Board (Solder Side)
T.P.5 (A2)
T.P.3(A0)
Yellow
NOTE : For the Test Points (T.P.3~5),
refer to the Parts Layout on P.C.Boards
and Wiring Diagram.
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Connect each of the wires to the Test point as illustrated in the diagram.
* Be very careful not to shorts the test points since they are located close together.