3-9
ONE POINT REPAIR GUIDE
7. NO SOUND (OPTICAL)
7-1. Solution
Replace IC507 on MAIN bottom board.
7-2. How to troubleshoot (Countermeasure)
1) Please check 3.3VA at R868. If you can check 3.3 VA, please confirm OPT_DET signal (R5R6) when
optical mode.
2) In spite of process 1), set has abnormal output, then replace IC507.
7-3. Service hint (Any picture / Remark)
< MAIN board top view >
IC507
IC507
R5R6
R5R6
R868
R868
R868
R868
Summary of Contents for SH4
Page 9: ...1 8 ...
Page 15: ...2 6 Figure 1 9 HOW TO DISASSEMBLE THE MAIN SET 9 Disassembly finish ...
Page 17: ...2 8 Figure 2 3 HOW TO DISASSEMBLE THE WOOFER 4 Disassembly finish ...
Page 21: ...2 14 ...
Page 36: ...3 15 2 FLASH MEMORY FIG 2 VCC CS CLK DO 4 5 6 7 6 7 5 4 VCC CS CLK DO ...
Page 38: ...3 17 4 USB FIG 4 1 5 V Voltage 12 FIG 4 2 USB D 13 FIG 4 3 USB D 14 12 14 13 ...
Page 40: ...3 19 6 OPTICAL FIG 6 1 OPT_IN 18 FIG 6 2 OPT_DET 19 19 18 ...
Page 53: ...3 42 3 41 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...
Page 55: ...3 46 3 45 ...
Page 62: ...4 7 4 AMP VOLTAGE FIG 4 2 AMP_12V FIG 4 1 AMP PVDD 10 11 11 10 ...
Page 63: ...4 8 5 PWM FIG 5 2 Woofer PWM SW Signal FIG 5 1 Woofer PWM SW Signal 12 13 13 12 ...
Page 64: ...4 9 6 LED FIG 6 2 Pairing On Status Green LED FIG 6 1 Pairing Off Status Red LED 14 15 15 14 ...
Page 65: ...4 10 ...