19
SX-20-K
5
6
7
8
5
6
7
8
A
B
C
D
E
F
Yes
Yes
No
No
No • JACK103 solder is defective.
• C703L or C703R solder is defective.
No
IC605 is defective or communication
defective or its solder is defective.
Yes
IC605 is defective or communication
defective or its solder is defective.
PHONO No sound
Does a sound come
out from SACD/CD input?
No
See "Speaker_A No Sound".
A sound does not come out
fromPHONO input.
I
Is there signal in
IC700 pin 3/pin 5?
(Check the C703L/R + pin.)
Yes
Is there signal in
IC605 pin 4/pin 29?
(Check the C710L/R + pin.)
Yes
Yes
Is there signal in
IC700 pin 1/pin 7?
(Check the C708L/R + pin.)
Is there DC+6V in IC700 pin 8?
(Check the R708R.)
Is there DC-6V in IC700 pin 4?
(Check the R708L.)
[Product state]
• Power cord connection (230 V/50 Hz)
• Unit POWER SW: ON
• Power ON operation by remote control
• SPEAKER-A selection
• INPUT: PHONO
[Product state]
• Power cord connection (230 V/50 Hz)
• Unit POWER SW: ON
• Power ON operation by remote control
• SPEAKER-A selection
• INPUT: TUNER (FM/AM)
• Tuner setting: FM
• IC105 or IC106 is defective or its
solder is defective.
• Check the
±
15 V power supply.
• IC101 is defective or its solder is
defective.
• PACK101 solder is defective.
No C708L, C708R, C710L, C710R
are defective or those solders are
defective.
IC700 is defective or its solder is
defective.
PACK101 is defective or its solder is
defective.
C113L or C113R is defective or its
solder is defective.
Yes
Yes
Yes
Yes
No
No
TUNER No sound
Does a sound come
out from SACD/CD input?
No
See "Speaker_A No Sound".
A sound does not come out
from TUNER input.
I
Is there signal in
PACK101 pin 7/pin 8?
(Check the C113L/R - pin.)
Is there signal in
IC605 pin 5/pin 28?
(Check the C113L/R + pin.)
Is there DC+5V in PACK101
pin 5? (Check the R708R
for +6 V, R708L for -6 V.)
Is there communication waveform
in TUNER_SCLK and TUNER_SDIO?
(Check the J405 for TUNER_SCLK,
J406 for TUNER_SDIO.)
No
• IC103 is defective or its solder is
defective.
• BD121 solder is defective.
• D520 is defective or its solder is
defective.
• Check the
±
15 V power supply.
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 ...