CDX-C90 - Sony Car Audio Service Manual (repair manual). Page 3

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Initial settings .......................................................................... 4
Setting the clock ...................................................................... 5
Using the main panel controls ................................................. 6
Basic oprations ........................................................................ 7
Using the rotary remote ........................................................... 8
Using the wireless remote ....................................................... 9
Menu display/Lists ................................................................ 10
Listening to a CD/MD ........................................................... 10
Playing tracks repeatedly ....................................................... 11
Playing tracks in random order ............................................. 12
Creating a program ................................................................ 12
Labeling a CD ....................................................................... 14
Selecting specific tracks for playback ................................... 15
Locating a disc by name ........................................................ 16
Viewing CD TEXT information ............................................ 17
Customizing the CD sound .................................................... 18
Listening to radio ................................................................... 18
Presetting radio stations ......................................................... 19
Specifying monaural/stereo mode ......................................... 20
Receiving only the strongest signals ..................................... 21
Labeling radio stations .......................................................... 22
Selecting a station by name ................................................... 23
Adjusting the sound characteristics ....................................... 23
Setting the set up menu ......................................................... 24
Setting the display menu ....................................................... 25
Setting the function menu ...................................................... 26
Selecting a surround menu .................................................... 26
Storing a surround effect for CDs ......................................... 27
Selecting the listening position .............................................. 28
Adjusting the cut-off frequency of the subwoofer(s) ............ 29
Adjusting the turn-over frequency of the bass and treble ...... 30
Additional information .......................................................... 31
Connections ........................................................................... 33

2-1.   Cover (Upper) ................................................................... 35
2-2.   Front Panel Assy ............................................................... 35
2-3.   Cords ................................................................................. 36
2-4.   Rear Panel ......................................................................... 36
2-5.   MD Assy ........................................................................... 37
2-6.   Audio Board ...................................................................... 37
2-7.   Bracket (MD) .................................................................... 38
2-8.   Motor Block ...................................................................... 38
2-9.   Base Panel Assy ................................................................ 39
2-10. Sub Panel Assy .................................................................. 39
2-11. Chassis (Front) Assy ......................................................... 40
2-12. Main Board ....................................................................... 40
2-13. Chassis (T) Sub Assy ........................................................ 41
2-14. Lever Assy ......................................................................... 41
2-15. Servo Board ....................................................................... 42
2-16. Roller Assy ........................................................................ 42
2-17. Chassis (OP) (O/S) Assy ................................................... 43
2-18. Optical Pick-up Block ....................................................... 43

CD Section ............................................................................ 44
Tuner Section ......................................................................... 44

4-1.   IC Pin Descriptions ........................................................... 47
4-2.   Block Diagram –CD Section– ........................................... 57
4-3.   Block Diagram –Main Section– ........................................ 59
4-4.   Block Diagram –Display Section– .................................... 61
4-5.   Circuit Boards Location .................................................... 63
4-6.   Printed Wiring Boards –CD Mechanism Section– ............ 63
4-7.   Schematic Diagram –CD Mechanism Section– ................ 67
4-8.   Schematic Diagram –Audio Section– ............................... 72
4-9.   Printed Wiring Board –Audio Section– ............................ 75
4-10. Schematic Diagram –Main Section (1/2)– ........................ 77
4-11. Schematic Diagram –Main Section (2/2)– ........................ 82
4-12. Printed Wiring Boards –Main Section– ............................ 87

5-1.   Case Section ...................................................................... 96
5-2.   Front Panel Section ........................................................... 97
5-3.   Chassis Section ................................................................. 98
5-4.   CD Mechanism Section (1) ............................................... 99
5-5.   CD Mechanism Section (2) ............................................. 100
5-6.   CD Mechanism Section (3) ............................................. 101

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