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18.2. (B) Main/Power Circuit
18.3. (C) FL, Music Port, Top Button, Tuner Extent and Tray Motor
Circuit
18.4. (D) Scart Circuit
19. Printed Circuit Board
19.1. (A) DVD Module P.C.B.
19.2. (B) Main & Power P.C.B.
19.3. (C)Tuner extent, AC-inlet, FL, Music Port, & Top button P.C.B.
19.4. (D) Scart & Tray Loading P.C.B.
20. Basic Troubleshooting Guide
20.1. Basic Troubleshooting Guide for Traverse Unit (DVD Module
P.C.B.)
20.2. Troubleshooting Guide for Power section (Power circuit)
/
Refer to the follow-up supplements for this model. This is due to the information not available at
the time of issue for this service manual.
21. Overall Flow-Chart (HT990)
21.1. SC-HT990 DVD Unit Block Diagram
21.2. HT990 Block Diagram (Analog Signal : DVD 5.1ch Play Back
Mode)
21.3. HT990 Block Diagram (Analog Signal : 2ch Analog Input Mode)
21.4. HT990 Power Supply Block Diagram
21.5. HT990 Power Block Diagram (SMPS)
22. Terminal Function of ICs
22.1. IC2018 (C2CBYY000195): System Control Microprocessor IC
58
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