20
SX-20-K
1
2
3
4
A
B
C
D
E
F
1
2
3
4
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No • Connection of CP401 is defective.
• Main transformer is defective.
• FPC101 or FPC400 solder is defective.
• Connection between FPC101 - FPC400 is defective.
Yes
Yes
Yes
Yes
• FPC101 or FPC400 solder is defective.
• Connection between FPC101 - FPC400 is defective.
• FPC101 or FPC400 solder is defective.
• Connection between FPC101 - FPC400 is defective.
FL No light
Does a sound come
out from SACD/CD input?
No
No
No
No
See "Speaker_A No Sound".
FL does not light.
I
Is there AC waveform
signal in FLT pin 1/pin 39?
(Check the FRONT Assy side B.)
Is there DC-30V in
FRONT Assy -30V?
(Check the FPC400 pin 1
on FRONT Assy side B.)
Is there DC+3.3V in
IC400 VDD?
(Check the VDD on
FRONT Assy side B.)
Is there communication
waveform signal in
FLT pin 4 - pin 36?
(Check the FRONT Assy side B.)
Is there communication waveform in
FRONT Assy FL_CLK, FL_DOUT?
(Check the FL_CLK, FL_DOUT
on FRONT Assy side B.)
Is there DC-30V
in MAIN Assy -30V?
(Check the J304.)
No
No
No
Is there communication waveform
in MAIN Assy FL_CLK, FL_DOUT?
(Check the FPC101 pin 9/pin 10.)
No
Is there DC+3.3V in
FRONT Assy FL_SW/RLY?
(Check the FPC400 pin 15 on
FRONT Assy side B.)
Does the STADBY LED
(Red) light at standby state?
Is there AC waveform
signal in R400A/R403A?
(Check the FRONT Assy side B.)
[Product state]
• Power cord connection (230 V/50 Hz)
• Unit POWER SW: ON
• Power ON operation by remote control
• SPEAKER-A selection
• INPUT: SACD/CD
IC101 is defective or its solder is
defective.
No IC400 is defective or its solder is
defective.
FLT400 is defective or its solder is
defective.
• Q401 is defective or its solder is defective.
• Q402 is defective or its solder is defective.
• R400A or R403A is defective or its solder is defective.
• R404 or R405 is defective or its solder is defective.
• DZ400 is defective or its solder is defective.
• Q501 is defective or its solder is defective.
• DZ513 is defective or its solder is defective.
• R508 is defective or its solder is defective.
• FPC101 or FPC400 solder is defective.
Summary of Contents for SX-20-K
Page 7: ...7 SX 20 K 5 6 7 8 5 6 7 8 A B C D E F ...
Page 11: ...11 SX 20 K 5 6 7 8 5 6 7 8 A B C D E F IC502 IC503 IC301 ...
Page 32: ...32 SX 20 K 1 2 3 4 A B C D E F 1 2 3 4 Pin Function ...
Page 47: ...47 SX 20 K 5 6 7 8 5 6 7 8 A B C D E F 1 x9 x5 x3 x3 x5 x6 x6 x5 x2 x15 x2 x2 x2 x4 x4 A A A ...