Pioneer SX-20-K Service Manual page 21

5
Remote control unit does not work.
[Product state]
• Power cord connection (230 V/50 Hz)
• Unit POWER SW: ON
• Power ON operation by remote control
Remote control unit does not work.
No
Does a sound come
out from SACD/CD input?
Yes
No
Is there signal in RMC?
(Check the R270.)
Yes
IC101 is defective or its solder is
defective.
5
6
• SPEAKER-A selection
• INPUT: SACD/CD
I
See "Speaker_A No Sound".
Is there signal in RMC
on FRONT Assy?
(Check the FPC400 pin 14
on FRONT Assy side B.)
Yes
• FPC101 or FPC400 solder is defective.
• Connection between FPC101 - FPC400 is defective.
6
7
• REM401 is defective or its solder is defective.
No
• Connection of CN403, CP403, CN402, CP402
are defective or those solders are defective.
SX-20-K
7
8
A
B
C
D
E
F
21
8