Sony Betacam SX DNW-A100 Maintenance Manual

6-84 DNW-A100/A50/A45DNW-A100P/A50P/A45P6-7. TBC-23 Board ReplacementThe electrical adjustments are essential after the TBC-23 board is replaced.To perform the electrical adjustment, the following equipment and fixtures are required.nThe TBC-23 board of the service parts code suffix-A cannot be used to this unit. Be sure to check thesuffix of service parts code before replacement. The service parts code is indicated on near the top rightcorner (F-2) of A side of TBC-23 board.For the TBC-23 board of the board number 1-648-543-13 or 1-648-543-14, modification is required.Please consult your local Sony Sales Office/Service Center in detail. The board number is indicated onthe left margin (A-6) of A side of TBC-23 board.. Component video signal generator: TEKTRONIX TSG-300 or equivalentnIt is required that the component video signal generator is able to output the 50% bowtie signal.. Composite video signal generatorFor DNW-A100/A50/A45: TEKTRONIX TSG-170A or equivalentFor DNW-A100P/A50P/A45P: TEKTRONIX TSG-271 or equivalent. Component waveform monitor: TEKTRONIX WFM300 or equivalent. Composite waveform/vector monitorFor DNW-A100/A50/A45: TEKTRONIX 1750, 1780R, or equivalentFor DNW-A100P/A50P/A45P: TEKTRONIX 1751, 1781R, or equivalent. VISC phase adjusting toolFor DNW-A100P/A50P/A45P only: (SONY part No. J-6332-240-A). Composite video monitor. 75 Z terminators (5 pcs.). Cleaning tape BCT-5CLN (SONY standard products). Alignment tapesFor DNW-A100/A50/A45: CR5-1B (SONY part No. 8-960-096-41) andCR5-2A (SONY part No. 8-960-097-44)For DNW-A100P/A50P/A45P: CR5-1B PS (SONY part No. 8-960-096-91) andCR5-2A PS (SONY part No. 8-960-098-44)6-7-1. Replacement ProcedurenTurn off the POWER switch before starting the replacement.(1) Remove the upper lid, board retainer (S), and TBC-23 (original) board.(Refer to “6-1-3. Plug-in Board Pulling out/Insertion”.)(2) Inserting a new TBC-23 board to the slot for TBC-23 board.(3) Connect the one disconnected harness to CN1 on the TBC-23 (new) board.(4) Clean the video heads using a cleaning tape. (Refer to “5-2-1. Cleaning using Cleaning Tape”.)(5) Perform the electrical adjustments (Section 6-7-2).(6) For DNW-A100/A50/A45 onlyReturn the ITEM-709 and ITEM-713 of setup extend menu to previous settings after the electricaladjustments are completed.(7) Return the states of S1100-1 on the SS-63 board and control panels to their previous states.(8) Turn off the power, and wait for 30 seconds.(9) Reattach the board retainer (S) and upper lid. (Refer to Section 6-1-3.)6-7. TBC-23 Board Replacement