Electrical Troubleshooting Guide - Zenith ZH-T202SF Series Service Manual

SECTION 3. DVD & AMP PART

ELECTRICAL TROUBLESHOOTING GUIDE

1. System operation flow
POWER ON.
1. Initializes SERVO, DSP & RISC registers.
2. Write RISC code to SDRAM.
3. Reset RISC.
Show LOGO.
Yes
Tray closed?
Tray close to closed position.
SLED at inner
side?
SLED moves to inner position.
1. Judge whether have disc and disc type.
2. Jump to related disc reading procedure.
Recieve
OPEN/ CLOSE
Key?
1. Execute Pressed Key & IR Key.
2. System operation routine loop.
1. Stop Playback & Open Tray.
2. Display tray open message & LOGO.
No
Receive
CLOSE Key?
No
Yes
No
No
Yes
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