
3-6. VE OPERATION Menu.....................................................................................................3-29
3-7. MAINTENANCE Menu.....................................................................................................3-39
4. Replacement of Main Parts
4-1. General Information for Parts Replacement..................................................................................4-1
4-1-1. Index....................................................................................................................4-1
4-1-2. Basic Knowledge.......................................................................................................4-3
4-2. Power Supply Unit............................................................................................................4-4
4-2-1. Power Block Assembly (D00)..........................................................................................4-4
4-2-2. DC Fan..................................................................................................................4-5
4-2-3. RE-274 Board...........................................................................................................4-7
4-2-4. PS-778D00 Board......................................................................................................4-8
4-2-5. Notes on Disassembling the Power Block Assembly (D00)..........................................................4-10
4-3. Front Panel...................................................................................................................4-13
4-3-1. Removal and Installation of Front Panel..............................................................................4-13
4-3-2. CN-3451 Board........................................................................................................4-13
4-3-3. AU-340 Board / LE-377 Board.......................................................................................4-14
4-4. Rear Panel....................................................................................................................4-16
4-4-1. Removal and Installation of Rear Panel Assembly...................................................................4-16
4-4-2. SDP-17 Board.........................................................................................................4-16
4-5. Plug-In Board................................................................................................................4-19
4-5-1. Installing/Removing Plug-in Boards on the Front Side...............................................................4-19
4-5-2. Installing/Removing Plug-in Boards and Blank Panels on the Rear Side............................................4-20
4-6. Main Frame..................................................................................................................4-21
4-6-1. HIF-62 Board..........................................................................................................4-21
4-6-2. SDI-99 Board..........................................................................................................4-21
4-6-3. CN-2675G Board......................................................................................................4-22
4-6-4. CN-2676 Board........................................................................................................4-23
4-6-5. CN-2677G Board......................................................................................................4-24
4-6-6. VIF-52 Board..........................................................................................................4-25
4-6-7. ADO-12 Board........................................................................................................4-26
4-6-8. CNB-29A Board.......................................................................................................4-27
4-6-9. MB-1181 Board.......................................................................................................4-28
5. Electrical Alignment
5-1. Preparations...................................................................................................................5-1
5-1-1. Equipment Required....................................................................................................5-1
5-1-2. Notes on Adjustments..................................................................................................5-1
5-1-3. Connection of Equipment..............................................................................................5-2
5-1-4. Initialization Settings...................................................................................................5-2
5-2. Audio System Adjustment....................................................................................................5-4
5-2-1. RTS Intercom Adjustment..............................................................................................5-4
5-3. Video/Reference Signal System Adjustment..................................................................................5-7
5-3-1. 27 MHz VCO Free-Running Adjustment..............................................................................5-7
5-3-2. Clock (74 MHz) Duty Adjustment.....................................................................................5-7
5-3-3. Prompter 1/2 Level Adjustment........................................................................................5-8
5-3-4. STAIR CASE Adjustment..............................................................................................5-9
5-4. SD Signal System Adjustment...............................................................................................5-11
5-4-1. VBS Output Level Adjustment........................................................................................5-11
HDCU2500 3