Pioneer PDP-R05E Service Manual page 170

1
DTB (Digital Terrestrial Board)(1/2)
A
DTB (Digital Terrestrial
Board) does not work
Yes
Is the power supply voltage
of CN6001 and CN6002
normal? I
Yes
Is DTB_RESET(CN6003
4PIN) becoming High in
power on after V+3V_DD
B
stood up?
I
Yes
Are TXDA(11) and RXDA(12)
of CN6003 communicating?
I
Yes
Is the panel displaying an
animation?
Yes
C
Is an animation output by
Monitor OUT?
D
Yes
B
E
F
170
1
2
Check the communication
No
between CN6001 and
CN8509, between CN6002
and CN8508.
Check the communication
No
between CN6003(4) and
CN6951(47),
between CN6951(47) and
IC7202(155).
Check the communication
No
between CN6003(11, 12)
and CN6951(39, 40).
No Is a signal input into
IC6951(171-202)?
Yes
Has the symptom been
settled when the MR MAIN
BOARD Assy is replaced?
Yes
Finishing troubleshooting
No
Is a signal output from RGB,
CVBS and Y/C of CN4000?.
Yes
Check the communication
between CN4000 and
CN8665, between CN8665
and IC8002, between
CN8665 and IC8005.
PDP-R05E
2
3
OK
Replace DTB.
OK
Replace DTB.
OK
Replace DTB.
Check the communication
No
between CN6003 and
B
CN6951, between CN6951
and IC6951.
No
The panel is defective.
No
DTB is defective.
Replace DTB.
I
3
4
OK
Replace DTB.
4