PIONEER S-LX70W/KUCXTW
Service Manual

5

6

7

8

A

C

When the Red and Blue LED are blinking
B

4

Check that the P/S output (PN203-9 pin) is high.
NO

Check the P/S output (PN203-9 pin) after replacing the SMPS Assy.

YES Check the AMP Assy

Check the 3.3 V line

5
+3.3 V is not output

Voltage of C39 is 0 V (TP9) Voltage of C39 is 5 V (TP9)

Go to

1

C

Replace the SMPS Assy +12 V is not output

2

+12 V or -12 V is not output

Replace the SMPS Assy

-12 V is not output Replace the SMPS Assy

3
+50 V is not output
D

Check the 50 V voltage by shortcircuiting the pins 6 and 8 of PN203 after separating the AMP Assy and SMPS Assy. NO Is the voltage of C26 (TP5) DC 18V or more? NO Replace the SMPS Assy

YES Replace the AMP Assy

YES

Replace the SMPS Assy

E

F

S-LX70W
5 6 7 8

17