Sony DVW-250 - Page 6

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DVW-250/250P
8. Replacement of Circuit Boards
8-1. General Information for Boards Replacement ............................................8-1
8-2. Video Boards Assembly Replacement ........................................................8-1
8-2-1. Opening/Removal of Video Boards Assembly ..........................8-1
8-2-2. DIF-31 Board Removal ..............................................................8-3
8-2-3. VPR-12 Board Removal ............................................................ 8-4
8-2-4. DPR-62 Board Removal ............................................................ 8-4
8-3. SST-3 Board Removal ................................................................................8-5
8-4. KY-315 Board Removal .............................................................................8-6
8-5. ADA-44 Board Removal.............................................................................8-7
8-6. EQ-54 Board Replacement .........................................................................8-8
8-7. DC/DC Converter Removal ........................................................................8-8
9. Electrical Alignment
9-1. General Information for Electrical Adjustment ..........................................9-1
9-1-1. Notes for Adjustment ................................................................. 9-1
9-1-2. Equipment/Fixtures .................................................................... 9-1
9-1-3. Initial settings for switches .........................................................9-2
9-1-4. Test Signals ................................................................................ 9-2
9-1-5. Adjustment after Replacement of Boards and/or Blocks ...........9-3
9-2. Power/Control System Adjustment .............................................................9-4
9-2-1. SST-3 Board Voltage Adjustment ............................................. 9-4
9-3. Servo System Adjustment ...........................................................................9-4
9-3-1. EEPROM Data Initialize ............................................................9-4
9-3-2. Click Position Correction of Tracking Volume ......................... 9-5
9-3-3. Capstan FG Duty Adjustment .................................................... 9-5
9-3-4. Capstan Free Speed Adjustment ................................................9-6
9-3-5. Drum PG Phase Adjustment ...................................................... 9-6
9-3-6. Save the Servo Data ...................................................................9-7
9-4. Audio System Adjustment ..........................................................................9-8
9-4-1. PB Level/Distortion Adjustment ................................................ 9-8
9-4-2. INPUT Level Adjustment .......................................................... 9-8
9-4-3. DC Offset Adjustment................................................................9-9
9-4-4. CUE ERASE Current Adjustment ........................................... 9-10
9-4-5. CUE Channel PB Frequency Response Adjustment ................9-10
9-4-6. CUE Bias Adjustment .............................................................. 9-11
9-4-7. CUE REC Level Adjustment ...................................................9-12
9-5. RF System Adjustment .............................................................................9-14
9-5-1. RF Parameter Initialize ............................................................ 9-16
9-5-2. Transversal Filter Adjustment ..................................................9-16
9-5-3. PLL Adjustment ....................................................................... 9-17
9-5-4. Phase Adjustment ..................................................................... 9-18
9-5-5. ADC V-ref Adjustment ............................................................9-18
9-5-6. ADC Sampling Phase Adjustment ........................................... 9-19