Sony XR-C750RDS / XR-C850RDS / XR-C850RW Service Manual ▷ View online
– 1 –
SERVICE MANUAL
MICROFILM
Model Name Using Similar Mechanism
XR-C700RDS
Tape Transport Mechanism Type
MG-52B-135
SPECIFICATIONS
Cassette player section
Tape track
4-track 2-channel stereo
Wow and flutter
0.08% (WRMS)
Frequency response
30 - 20,000 Hz
Signal-to-noise ratio
Cassette type
Dolby B NR
Dolby C
*
NR
Dolby NR off
TYPE II, III, IV
67 dB
73 dB
61 dB
TYPE I
64 dB
70 dB
58 dB
* XR-C850RDS only
Tuner section
FM
Tuning range
87.5 - 108.0 MHz
Aerial terminal
External aerial connector
Intermediate frequency 10.7 MHz
Usable sensitivity
Usable sensitivity
9 dBf
Selectivity
75 dB at 400 kHz
Signal-to-noise ratio
65 dB (stereo),
68 dB (mono)
68 dB (mono)
Harmonic distortion at 1 kHz
0.5% (stereo),
0.3% (mono)
0.3% (mono)
Separation
35 dB at 1 kHz
Frequency response
30 - 15,000 Hz
Capture ratio
2 dB
MW/LW
Tuning range
MW : 531 - 1,602 kHz
LW : 153 - 281 kHz
LW : 153 - 281 kHz
Aerial terminal
External aerial connector
Intermediate frequency 10.71 MHz/450 kHz
Sensitivity
Sensitivity
MW : 30 µV
LW : 50 µV
LW : 50 µV
Power amplifier section
Outputs
Speaker outputs
(sure seal connectors)
(sure seal connectors)
Speaker impedance
4 - 8 ohms
Maximum power output 40 W
×
4 (at 4 ohms)
– Continued on next page –
Photo : XR-C850RDS
XR-C750RDS/C850RDS
AEP Model
UK Model
FM/MW/LW CASSETTE CAR STEREO
– 2 –
General
Outputs
Line outputs (3)
Power aerial relay control
lead
Power amplifier control
lead
Power aerial relay control
lead
Power amplifier control
lead
Tone controls
Bass ± 8 dB at 100 Hz
Treble ± 8 dB at 10 kHz
Treble ± 8 dB at 10 kHz
Power requirements
12 V DC car battery
(negative ground)
(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)
connections (1 set)
Front panel case (1)
Rotary remote RM-X2S (1)
Design and specifications are subject to change without
notice.
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
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
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
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
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
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
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.
aged by heat.
Dolby noise reduction manufactured under license from Dolby Labora-
tories Licensing Corporation.
“DOLBY” and the double-D symbol
tories Licensing Corporation.
“DOLBY” and the double-D symbol
a
are trademarks of Dolby Labora-
tories Licensing Corporation.
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SECTION 1
GENERAL
This section e
xtracted from
instr
uction man
ual.
– 4 –