SX-315
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7. GENERAL INFORMATION
7.1 DIAGNOSIS
7.1.1 TROUBLE SHOOTING
The Protection circuit is activated by DC or overcurrent detection.
Detection method:
The voltage at the Protection port (Pin 7) of the microcomputer becomes low.
Time required for detection:
2.5 sec after the power is turned on
Operation when the Protection circuit is activated:
• Mute: ON
• Speaker Relay: OFF
• The unit immediately enters Standby mode.
Recovery method:
Press the STANDBY key twice.
When the DC detection circuit is not normal
When the overcurrent detection circuit is not normal
• BD501 and BD502 are in failure or their peripheral circuits are short-circuited.
• Power amp section is in failure.
• Protection circuit is in failure.
• Microcomputer is in failure. (pin 7: protection)
• Power amp section is in failure.
• Protection circuit is in failure.
• Microcomputer is in failure. (pin 7: protection)
• Only when the signal is output, short-circuiting of the output circuit is suspected.
Summary of Contents for SX-315
Page 7: ...SX 315 7 5 6 7 8 5 6 7 8 C D F A B E ...
Page 14: ...SX 315 14 1 2 3 4 1 2 3 4 C D F A B E 3 BLOCK DIAGRAM AND SCHEMATIC DIAGRAM 3 1 BLOCK DIAGRAM ...
Page 15: ...SX 315 15 5 6 7 8 5 6 7 8 C D F A B E 7809 ...
Page 25: ...SX 315 25 5 6 7 8 5 6 7 8 C D F A B E ...
Page 31: ...SX 315 31 5 6 7 8 5 6 7 8 C D F A B E D DSP ASSY D CN2 CN1 IC1 Q6 Q5 Q4 Q3 Q1 Q2 SIDE B ...
Page 36: ...SX 315 36 1 2 3 4 1 2 3 4 C D F A B E G FRONT ASSY G CN301 Q301 Q302 IC302 IC301 SIDE B ...
Page 37: ...SX 315 37 5 6 7 8 5 6 7 8 C D F A B E G CP306 CN305 CN303 CN302 C301 Q303 Q304 SIDE B ...
