Pioneer krp-m01, Руководство по обслуживанию

Страница: 47 / 131

47
KRP-M01
5 6 7 8
5 6 7 8
A
B
C
D
E
F
Is a Packet Error generated?
An error may be generated in the B.E. block
(after the demodulation TS is output).
Replace the MAI N BLOCK Assy.
N o
N o
[Checking of the reception environment]
• Is the C/
N value affected by a wireless LA N or other ambient electromagnetic waves?
• W hen the dressing of the RF cable is modified, does the C/ N value fluctuate?
• W hen the RF cable is shortened as much as possible, is the symptom cleared?
N o
[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?
•
W hen a booster or attenuator is added, is the symptom cleared?
• Is the RF cable defective?
•
W hen the dressing of the RF cable is modified, does the level fluctuate?
N o
If IF_AGC level and C/ N value are
high enough, block noise is not
usually generated.
Yes
=> DT V 2
Replace the MAI N BLOCK Assy
and check if the symptom persists.
Yes
Is the input level high enough?
(IF_AGC check)
Is the C/ N value high enough?
(MER check)
Yes
Yes
Is a Packet error generated?
(PER check) An error may be generated in the B.E. block
(after the demodulation TS is output).
Replace the MAI N BLOCK Assy.
N o
N o
[Checking of the reception environment]
• Is the C/
N value affected by a wireless LA N or other ambient electromagnetic waves?
• W hen the dressing of the RF cable is modified, does the C/ N value fluctuate?
• W hen the RF cable is shortened as much as possible, is the symptom cleared?
N o
[Checking of the reception environment]
• Is the signal loss large because multiple distributors are used?
•
W hen a booster or attenuator is added, is the symptom cleared?
• Is the RF cable defective?
•
W hen the dressing of the RF cable is modified, does the level fluctuate?
N o
If IF_AGC level and C/ N value are
high enough, block noise is not
usually generated.
Yes
Replace the MAI N BLOCK Assy
and check if the symptom persists.
Yes
Is the input level high enough?
(RF Level check)
Is the C/ N value high enough?
(C/ N check)
Yes
Yes
Block noise is generated.
Di g ital Terrestrial Broadcast
Di g ital satellite Broadcast