Table of Contents
Advertisement
1
Back end section check flow chart
A
NO
B
NO
NO
C
FE test mode
D
E
F
184
1
2
START
Play start
YES
NO
Is a video unusual?
Is sound unusual?
YES
YES
AVCC5
AVCC5
voltages OK?
voltages OK?
Check 9
Check 9
YES
YES
DACCLK
Video circuit OK?
operated normally?
Check 12
Check 10
YES
YES
Audio circuit OK?
Check 11
YES
To FE test mode
Fault part repair
NO
Normal?
YES
Normal end
AVH-P7800DVD/UC
2
3
NO
NO
Stanby OK?
Check 1
YES
NO
SRVDD power
supply OK?
Check 6
YES
NO
NO
SDRAM IF
OK?
Check 7
YES
NO
NO
VD8 and VCC5
power supply
voltages OK?
Check 8
YES
NO
To FE test mode
To FE test mode
NO
FE part normal?
YES
Unit exchange
NO
Normal?
YES
Normal end
3
4
VDD5(VCC33,VCC12)
power supply voltages OK?
Check 2
YES
NO
Reset OK?
Check 3
YES
NO
VSENS OK?
Check 4
YES
NO
27MHz operated
normally?
Check 5
YES
Unit exchange
Fault FE
part repair
4
Advertisement
Table of Contents
