SECTION 3
ELECTRICAL
CONTENTS
ONE POINT REPAIR GUIDE
............................................................................................................................
3-2
1. NO POWER ............................................................................................................................................ 3-2
2. NO BOOTING WHEN POWER ON THE SET........................................................................................ 3-4
3. NO BOOTING IN CD/USB FUNCTION .................................................................................................. 3-5
4. NO OPERATION OF MD ...................................................................................................................... 3-10
5. NO SOUND IN THE USB FUNCTION .................................................................................................. 3-15
6. AUDIO OUTPUT IS SMALL OR NO AUDIO OUTPUT ........................................................................ 3-16
7. NO POWER ON (STANDBY LED IS BLINKING) ................................................................................. 3-17
8. SPEAKER NO AUDIO .......................................................................................................................... 3-18
9. NO SOUND ........................................................................................................................................... 3-19
10. VFD IS NOT DISPLAYED WHEN POWER ON THE SET ................................................................... 3-24
ELECTRICAL TROUBLESHOOTING GUIDE
.................................................................................................
3-25
1. POWER SUPPLY ON SMPS BOARD .................................................................................................. 3-25
2. SYSTEM PART ..................................................................................................................................... 3-28
3. NO AUDIO CHECK ............................................................................................................................... 3-29
WAVEFORMS OF MAJOR CHECK POINT
....................................................................................................
3-34
1. DSP (IC501) .......................................................................................................................................... 3-34
2. PWM (IC600) ........................................................................................................................................ 3-35
3. SERVO (IC401) ..................................................................................................................................... 3-36
4. MOTOR DRIVER (IC400) ..................................................................................................................... 3-37
5. ADC ....................................................................................................................................................... 3-38
6. USB ....................................................................................................................................................... 3-38
7. BLUETOOTH ........................................................................................................................................ 3-39
WIRING DIAGRAM
..........................................................................................................................................
3-41
BLOCK DIAGRAM
..........................................................................................................................................
3-43
CIRCUIT VOLTAGE CHART
...........................................................................................................................
3-45
1. CAPACITOR VOLTAGE ....................................................................................................................... 3-45
PRINTED CIRCUIT BOARD DIAGRAMS
.......................................................................................................
3-47
1. SMPS P.C.BOARD DIAGRAM ............................................................................................................. 3-47
2. MAIN P.C.BOARD DIAGRAM .............................................................................................................. 3-51
3. FRONT P.C.BOARD DIAGRAM ........................................................................................................... 3-55
4. JACK P.C.BOARD DIAGRAM .............................................................................................................. 3-59
3-1
Summary of Contents for CJ87
Page 17: ...1 16 ...
Page 19: ...2 2 ...
Page 21: ...2 6 2 5 ...
Page 23: ...2 8 A60 3 SPEAKER SECTION FRONT SPEAKER ...
Page 69: ...3 40 ...
Page 73: ...3 47 3 48 PRINTED CIRCUIT BOARD DIAGRAMS 1 SMPS P C BOARD DIAGRAM TOP VIEW ...
Page 75: ...3 51 3 52 2 MAIN P C BOARD DIAGRAM TOP VIEW ...
Page 76: ...3 53 3 54 MAIN P C BOARD DIAGRAM BOTTOM VIEW ...
Page 77: ...3 55 3 56 3 FRONT P C BOARD DIAGRAM TOP VIEW ...
Page 78: ...3 57 3 58 FRONT P C BOARD DIAGRAM BOTTOM VIEW ...
Page 79: ...3 59 3 60 4 JACK P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...