Pioneer XW-HTP550 Service Manual page 36

1
2. Receiver (Wireless SP) side
(1) In a case where the power is not turned on (the POWER LED does not light)
A
Insert the FFC
correctly.
Is the
B
POWER LED lit?
Yes
C
(2) In a case where no sound is output
D
Check the Transmitter side.
Check the "SP PROTECT"circuits
around Q3455 and Q3454.
E
Replace IC12
and IC13.
(A)
F
36
1
2
No power
(The POWER LED does not light.)
Is the
No
FFC (*1) correctly
inserted?
Yes
No
Is the fuse FU1 blown?
Yes
Replace the FU1 fuse.
Yes
Is the POWER
LED lit?
Yes
Inspection completed.
No
No
No
Is +B voltage active?
XW-HTP550
2
3
(*1) : FFC between CN5901 (RX Assy) and CN5902 (LED Assy)
Is the
No
IC11 and/or IC14
in MAIN Assy
broken?
Yes
Replace IC11 and/or
IC14.
Yes
No
Is the POWER
LED lit?
Yes
No sound
Is TUNED LED
lit?
Yes
Is the relay on?
Yes
Yes
(B)
3
4
No
Check that the circuits
are not short-circuited.
As the circuit for +9 V is most
likely to have been short-
circuited, check the circuits
around IC15.
No
4