-6-
troubleshooting
No Picture
Check following steps.
No picture with all of
input sources
Check signal processing stage and LCD driving stage;
Check RGB S&H signals at test points TP_B1, TP_G1, TP_R1.
Check power supply circuit 15.5V and peripheral circuit.
Check ICs IC501, IC51, IC561, IC501, IC51, IC561, IC401, IC01
and peripheral circuits.
Check RGB signals on PC1.
R signal is applied to pin 8 of IC01<System Control>, G signal is ap-
plied to pin 60 and B signal is applied to pin 58 of IC 01.
HV sync signals are applied to pins 1 and 161 of IC01<System Con-
trol> as the HS and VS signals.
No picture with Pc1
input source only
No picture with Pc2
input source only
Check RGB signals on PC.
R signal is applied to pin 17 of IC01<System Control>, G signal is
applied to pin 78 and B signal is applied to pin 56 of IC 01.
HV sync signals are applied to pins 5 and 66 of IC01<System Con-
trol> as the HS and VS signals.
Check AV Source Selecting and decoding state;
S-Video source
Check S-video signal (Y/C).
S_C signal is applied to pin 65 of IC01<System Control>, and S_Y
signal is applied on pin 64 of IC01.
S-SW signal (S-Video:L) is input to pin 67 of IC01<System Control>.
Composite video source
Check composite video signal (Video).
The composite video signal is applied to pin 6 of IC01<System Con-
trol>.
No picture with video
input sources
Yes
Yes
Yes
No
No
No
Yes
Summary of Contents for PRM-20
Page 68: ... 68 IC Block Diagrams MP2106 DC DC Converter IC5821 IC5861 FA5502 P F Control IC621 ...
Page 71: ... 71 IC Block Diagrams LM4889 Audio Output IC5031 NJW1156 Audio Control IC5001 ...
Page 74: ... 74 LAN9118 LAN Driver IC8801 IC Block Diagrams MC9328MX21 System Control of Network IC8301 ...
Page 103: ...KM5 2000 KM5 20 S 00 103 ...
Page 104: ... KM5YC KM5ZC January 2009 DC 200 Printed in Japan ...
Page 116: ...A10 SCH_KM5YC SCH_KM5ZC NO DATA ...