PIONEER XWHT1
Instrukcja Serwisowa

1

2

3

4

(1) In a case where the power is not turned on (the POWER LED does not light)

RX side
A

No power (The POWER LED does not light.)

Insert the FFC correctly.

No

Is the FFC correctly inserted? Yes

Is the POWER LED lit?
B

No

Yes

Is the fuse blown?

No

Is the protection circuit in IC11 and/or IC14 broken? Yes Replace IC11 and/or IC14.

No

Check that the circuits are not short-circuited. As the circuit for +9 V is most likely to have been shortcircuited, check the circuits around IC15.

Yes Replace the F1 fuse. Yes
C

Yes

Is the POWER LED lit?

No

Is the POWER LED lit?

No

Yes Inspection completed.

Yes

(2) In a case where no sound is output
D

RX side

No sound

Check the electric potentials at each point of the module.

No

Is TUNED lit?

Yes

E

Check the circuits around Q3455 and Q3454.

No Is the relay on?

Yes

Replace IC12 and IC13.

No

Is +B voltage active?

Yes
F

56
1 2

XW-HT1
3 4