XR-C750RDS, XR-C850RDS, XR-C850RW - Sony Car Audio Service Manual (repair manual). Page 2

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General
Outputs
Line outputs (3)
Power aerial relay control
lead
Power amplifier control
lead
Tone controls
Bass ± 8 dB at 100 Hz
Treble ± 8 dB at 10 kHz
Power requirements
12 V DC car battery
(negative ground)
Dimensions
Approx. 184 
×
 50 
×
 176 mm
(w/h/d)
Mounting dimensions
Approx. 182 
×
 53 
×
 163 mm
(w/h/d)
Mass
Approx. 1.3 kg
Supplied accessories
Parts for installation and
connections (1 set)
Front panel case (1)
Rotary remote RM-X2S (1)
Design and specifications are subject to change without
notice.
TABLE OF CONTENTS
1. GENERAL
Location of Controls .................................................................. 3
Preparing the rotary remote ....................................................... 3
Setting the Clock ....................................................................... 3
Cassette Player .......................................................................... 4
Radio ......................................................................................... 4
RDS ........................................................................................... 5
Other Functions ......................................................................... 7
CD/MD Changer ....................................................................... 9
DSP .......................................................................................... 11
Connections ............................................................................. 14
2. DISASSEMBLY
2-1.   Cover Assy .......................................................................... 16
2-2.   Front Panel Assy ................................................................. 16
2-3.   Sub Panel Assy .................................................................... 17
2-4.   Mechanism Deck Block ...................................................... 17
2-5.   Heat Sink ............................................................................. 18
2-6.   Main Board .......................................................................... 18
3. ASSEMBLY OF MECHANISM DECK
Alignment of Rotary Switch .................................................... 19
Gear (LDG-E) .......................................................................... 19
Chassis (S) Assy ...................................................................... 20
Lever (Mode) ........................................................................... 20
Lever (Pinch Selection) ........................................................... 21
Head Plate Assy ....................................................................... 21
Lever (Pinch) Assy .................................................................. 22
Housing ................................................................................... 22
Arm (Suction) .......................................................................... 23
Lever (LDG-A)/(LDG-B) ........................................................ 23
Gear (LDG-FT) ....................................................................... 24
Guide (C) ................................................................................. 24
4. MECHANICAL ADJUSTMENTS
................................. 25
5. ELECTRICAL ADJUSTMENTS
Deck Section ............................................................................ 25
Tuner Section ........................................................................... 26
6. DIAGRAMS
6-1.   IC Pin Descriptions ............................................................. 30
6-2.   Block Diagram –TC Section– ............................................. 35
6-3.   Block Diagram –Main Section– .......................................... 37
6-4.   Printed Wiring Boards –Main Section– .............................. 39
6-5.   Schematic Diagram –Main Section– ................................... 43
6-6.   Printed Wiring Board –Panel Section– ................................ 48
6-7.   Schematic Diagram –Panel Section– .................................. 50
7. EXPLODED VIEWS
7-1.   Chassis Section .................................................................... 59
7-2.   Front Panel Section ............................................................. 60
7-3.   Mechanism Deck Section-1 ................................................ 61
7-4.   Mechanism Deck Section-2 ................................................ 62
8. ELECTRICAL PARTS LIST
......................................
63
Notes on Chip Component Replacement
Never reuse a disconnected chip component.
Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Dolby noise reduction manufactured under license from Dolby Labora-
tories Licensing Corporation.
“DOLBY” and the double-D symbol 
a
 are trademarks of Dolby Labora-
tories Licensing Corporation.
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