Pioneer PDP-5020FD Service Manual page 64

1
A
=> DTV 1
Digital tuner signal is not
displayed on the screen.
Yes
Is the input selecter set to
TV/DTV?
Yes
B
Is the symptom cleared if connection
of the RF IN connector is secured or
the RF cable is replaced?
No
Is the DTV-related menu displayed
on the home menu?
Yes
With a DTV channel selected, are the
level and quality of the DTV channel
displayed on the Home Menu high
enough?
Yes
C
Replace the MAIN Assy.
=> DTV 2
Block noise is generated in the
digital tuner.
D
Yes
Is an uncorrected error
generated?
Yes
Replace the MAIN Assy and
check if the symptom persists.
Yes
Is the input level high enough?
(IF_AGC check)
Yes
E
Is the C/N value high enough?
(C/N check)
Yes
If IF_AGC level and C/N value are
high enough, block noise is not
usually generated.
F
64
1
2
No
Select the TV/DTV selector
to DTV input.
Yes
Poor connection of the
connectors or defective cable
No
Replace the MAIN Assy.
No
Is the periphery of the terrestrial-
broadcast tuner defective?
No
An error may be generated in the B.E. block
(after the demodulation TS is output).
No
Defective MAIN Assy
No [Checking of the reception environment]
• Does the input level become high when the antenna is reoriented?
• Is the signal loss large because multiple distributors are used?
• When a booster or attenuator is added, is the symptom cleared?
• Is the RF cable defective?
• When the dressing of the RF cable is modified, does the level fluctuate?
No
[Checking of the reception environment]
• Is the C/N value affected by a wireless LAN or other ambient electromagnetic waves?
• When the dressing of the RF cable is modified, does the C/N value fluctuate?
• When the RF cable is shortened as much as possible, is the symptom cleared?
PDP-5020FD
2
3
No
Replace the MAIN Assy.
3
4
4