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ABCD Professional Audio Products Technical Bulletin 1999-012 Digital Worldwide Technical Bulletins for Broadcast and Professional Products Date: April 5, 1999 Subject: OUTPUT LEVEL DROP WHEN CONNECTING 600W DEVICES Model: DPS-V77 Serial No: ALL DESCRIPTION If the output level drops when the XLR (balance) output is connected to other devices at 600W termination, replace the main board ICs and resistors shown below. (See Figures 1 and 2.) MAIN BOARD SCHEMATIC DIAGRAM 470 ➔ 100 Former IC403 IC503 NJM4580E 8-759-711-83 R427, R428 R527, R528 R425, R426 R525, R526 OUT New fi NJM5532M 8-759-700-94 Carbon, 100W 1-259-983-11 fi Carbon, 22W 1-259-975-11 Carbon, 470W 1-259-991-11 fi Carbon, 100W 1-259-983-11 NJM4580E ➔ IC or Resistor 100 ➔ 22 NJM5532M Figure 1 MAIN BOARD S102 R426 R426 470W ➔ 100W R425 + IC403 R425 470W ➔ 100W R427 R428 IC503 R427, R428 100W ➔ 22W IC502 R527 R528 R526 R525, R526 470W ➔ 100W R527, R528 100W ➔ 22W R525 Figure 2 NCA(AU)98-013 Page 1 of 1 Broadcast Professional Products Asia • Sony Australia • Sony Broadcast Professional Europe • Sony Canada Ltd. • Sony Electronics Inc.USA • Sony Products Professional Latin America 1019990008W01.FM