DV-650
DV-650W
Yes
Check the A 9V line.Check the IC6601 periphery circuit, including the microphone jack (J6601-2).Check whether the ALC circuit (Q6601-4, A6607-8) is operating normally.Check the MIC-1/2 VR. periphery circuit.Check the Q6609 periphery circuit.Check whether the mute circuit (Q6610-11) is operating normally, taking the microphone jack (J6601-2) as a starting point.
NoNoNoNoNo
YesYesYesYesYes
FLOW CHART NO.17Sound is not output from MIC-1 and MIC-2.Set MIC VR to MAX.Is 9V voltage applied to the IC6601 pin 8?Is it possible to confirm the audio signals from the specific microphones on the IC6601 pins 7 and 1?Is it possible to confirm the audio signals from the specific microphones on the Q6613 and Q6612 bases?Is it possible to confirm the audio signal from the microphone on the Q6609 emitter?Is it possible to confirm the audio signals from the microphone on the pins 1 and 5 of A/D converter IC804 for Karaoke?Check or replace the IC804 periphery circuit.
YesYes
Check the main unit. (IC201, Q202-7 periphery circuit)Check the lines between the pins of main unit connector CN801 and the pins of IC2006.Check the line between the video signal selection switch (SW2001) and IC2006 pins 9, 10 and 11.Make sure that the level of IC2006 pin 6 is "L" level.Check or replace IC2006.Check the V-MUTE line.Check the Cb/V DRIVE circuit IC2003 periphery circuit.Check the S-YC DRIVE circuit IC2002 periphery circuit.Check the Cb/V DRIVE circuit IC2003 periphery circuit.Check the Cr/Y DRIVE circuit IC2004 periphery circuit.Check the main unit.(IC801-3 circuit)Check the AUDIO AMP. circuit IC6001 periphery circuit.Check the AUDIO AMP. circuit IC6002 periphery circuit.
No
NoNoNoNoNoNoNoNoNoNoNoNoNo
YesYesYesYes
In case of the S-OUT/VIDEO-OUT sideIs the composite video signal output to the VIDEO OUT terminal(J2001)? Is the luminance signal output to the S-OUT terminal (J2002)? Is the chroma signal output to the S-OUT terminal (J2002)? In case of the Cb/Cr/Y side Is theCb signal output to the Cb OUT terminal(J2001)? Is the Y signal output to the Y OUT terminal (J2002)? Is the Cr signal output to the Cr OUT terminal (J2002)?
<Audio system><Video system> Are the video signals output to the pins of main unit connector CN801? CN801 25Pin CVBS/Cb CN801 27Pin C/Cr CN801 29Pin Y/YAre the video signals shown above input into the pins of IC2006? IC2006 4Pin CVBS/Cb IC2006 15Pin C/Cr IC2006 14Pin Y/YAre the video signals output to the pins of IC2006 with the video signal selection switch (SW2001)? (1) In case of the S-OUT/VIDEO-OUT side IC2006 5Pin CVBS IC2006 12Pin S-Y IC2006 2Pin S-C (2) In case of the Cb/Cr/Y side IC2006 3Pin Cb IC2006 13Pin COMP-Y IC2006 1Pin CrAre the video signals output to the specific output terminals? (1) (2) Are the audio signals output to the pins of main unit connector CN801? CN801 1Pin FRONT-L CN801 3Pin FRONT-R CN801 5Pin REAR-L CN801 6Pin REAR-R CN801 7Pin CENTER CN801 8Pin SUB WOOFERAre the audio signals output to the specific output terminals?Are the audio signals output to the FRONT-L/R OUT terminal (J2001)? Are the audio signals output to the REAR-L/R OUT terminal (J2001)? Are the audio signals output to the CENTER/ SUBWOOFER terminal (J2001)?
FLOW CHART NO.16Both video and audio do not operate normally.Set the disc on the disc tray.
10-3
ACEC
SHARP
