Pioneer PRA-BD11 Service Manual page 44

1
5 When no AES/EBU signal is input, LED 3 is unlit
A
START
IC8301
pins 17, 18, 23
and 24
L
B
IC8311
pin 2
L
IC8311
pin 1
L
C
D8303
Lit
Check +5V power supply
D
TP8481=
+5V ?
Yes
Is pin 7 of IC8301
+5V ?
Yes
E
Is pin 22 of IC8301
+5V ?
Yes
Check the mounting status of IC8301
If there is no problem in mounting status, IC8301 may be in failure.
F
44
1
2
H Check the logical states of Pins 1, 4, 9 and 12 of IC8312.
If they are all H, check the mounting statuses of Pins 192, 193, 194, and 195 of IC8201.
H
Check the mounting status of Pin 199 of IC8201.
• Check the logical state of TP8215. If it is L, check the mounting status of CN8202.
H
• Check the logical state of Pin 4 of IC8308. If it is L, check the mounting status of IC8308.
• Check the logical state of Pin 12 of IC8309. If it is L, check the mounting status of IC8309.
Unlit
Check the mounting and operation statuses of CN8201, R8208, TH8301 and F8301,
in that order.
No
Check the mounting and operation statuses of F8302.
No
Check the mounting and operation statuses of F8304.
No
Check the mounting and operation statuses of F8305.
PRA-BD11
2
3
3
4
4