Denon DVM-4800 Service Manual

Also see for DVM-4800: Specifications Operating instructions Service manual Operating instructions

Contents

15DVM-48005. ADJUSTMENT PROCEDURES5.1. Service Tools and EquipmentApplication Name NumberTilt adjustment DVD test disc DVDT-S15 or DVDT-S01Hex wrenchInspection Extension cable (module P.W.B. to mother P.W.B.) JGS0098Extension cable (module P.W.B. to mother P.W.B.) VUC8026Extension cable (module P.W.B. to mother P.W.B.) RFKZ0097Extension cable (module P.W.B. to mother P.W.B.) VUC8026Others Screw lock RZZ0L01Grease RFKXGAK152Oil RFKXGA1280, JZS0648Confirmation CD test disc PVCD-K06 or any other commerciallyavailable discVCD test disc PVCD-K06 or any other commerciallyavailable discRecovery disc RFKZD5TR0015.2. Important points in adjustment5.2.1. Important points in optical adjustment· Before starting optical adjustment, be sure to take anti-static measures.· Optical pickup tilt adjustment is needed after replacement of the following components.1. Optical pickup unit2. Spindle motor unit3. Optical pickup peripheral parts (such as rail)NotesAdjustment is generally unnecessary after replacing other parts of the traverse unit. However, make adjustment if there is anoticeable degradation in picture quality. Optical adjustments cannot be made inside the optical pickup. Adjustment is generallyunnecessary after replacing the traverse unit.5.2.2. Important points in electrical adjustment· Follow the adjustment procedures described in this Manual.5.3. Storing and Handling Test Discs· Surface precision is vital for DVD test discs. Be sure to store and handle them carefully.1. Do not place discs directly onto the workbench, etc., after use.2. Handle discs carefully in order to maintain their flatness. Place them into their case after use and store them vertically. Storediscs in a cool place where they are not exposed to direct sunlight or air from air conditioners.3. Accurate adjustment will not be possible if the disc is warped when placed on a surface made of glass, etc. If this happens, usea new test disc to make optical adjustments.4. If adjustment is done using a warped disc, the adjustment will be incorrect and some discs will not be playable.