Service manual

CD-SW250DVD
7 – 4
• Video is not output normally.
Put a disc on the DISC tray.
Yes
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
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)
Yes
Check or replace DOLBY PWB.
• Audio is not output normally.
Put a disc on the DISC tray.
Yes
Digital sound signal inputted to pins 2,3 and 4 of IC3301? No Check each line between pin 82,83,86 of IC3201 and pin 2,3,4
of IC3301
Yes Yes
Check or replace IC3301 Check or replace IC3201