Sharp CD-SW250DVD Service Manual page 86

CD-SW250DVD
• Video is not output normally.
Put a disc on the DISC tray.
Are the video signals input to the pins of CN3007 as shown
below ?
CN3007 Pin1 COMP_OUT
CN3007 Pin2 C_OUT
CN3007 Pin3 Y_OUT
CN3007 Pin4 Y/G
CN3007 Pin5 Pb/B
CN3007 Pin6 Pr/R
Check or replace DOLBY PWB.
• Audio is not output normally.
Put a disc on the DISC tray.
Digital sound signal inputted to pins 2,3 and 4 of IC3301?
Check or replace IC3301
Yes
Yes
Yes
Yes
No Check the line between the pins of DVD servo unit IC3701 and the
pins of CN3007.
IC3701 Pin 33 to CN3007 Pin 1(COMP_OUT)
IC3701 Pin 31 to CN3007 Pin 2(C_OUT)
IC3701 Pin 28 to CN3007 Pin 3(Y_OUT)
IC3701 Pin 25 to CN3007 Pin 4(Y/G)
IC3701 Pin 23 to CN3007 Pin 5(Pb/B)
IC3701 Pin 21 to CN3007 Pin 6(Pr/R)
No Check each line between pin 82,83,86 of IC3201 and pin 2,3,4
of IC3301
Check or replace IC3201
7 – 4
Yes