Sony CDX-C5850R User manual

– 1 –
Model Name Using Similar Mechanism CDX-C570R/C580R
CD Drive Mechanism Type MG-363T-121
Optical Pick-up Name KSS-521A
SERVICE MANUAL
AEP Model
UK Model
CDX-C5850R
FM/MW/LW COMPACT DISC PLAYER
CD player section
System Compact disc digital audio
system
Signal-to-noise ratio 90 dB
Frequency response 10 – 20,000 Hz
Wow and flutter Below measurable limit
Tuner section
FM
Tuning range 87.5 – 108.0 MHz
Aerial terminal External aerial connector
Intermediate frequency 10.7 MHz
Usable sensitivity 12 dBf
Selectivity 75 dB at 400 kHz
Signal-to-noise ratio 65 dB (stereo),
68 dB (mono)
Harmonic distortion at 1 kHz
0.8% (stereo),
0.6% (mono)
Separation 35 dB at 1 kHz
Frequency response 30 – 15,000 Hz
MW/LW
Tuning range MW: 531 – 1,602 kHz
LW: 153 – 281 kHz
Aerial terminal External aerial connector
Intermediate frequency 10.7 MHz / 450 kHz
Sensitivity MW: 30 µV
LW: 50 µV
SPECIFICATIONS
Power amplifier section
Outputs Speaker outputs
(sure seal connectors)
Speaker impedance 4 – 8 ohms
Maximum power output 40 W ×4 (at 4 ohms)
General
Outputs Line outputs (2)
Power aerial relay control
lead
Power amplifier control
lead
Telephone ATT 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. 178 ×50 ×185 mm
(w/h/d)
Mounting dimension Approx. 182 ×53 ×162 mm
(w/h/d)
Mass Approx. 1.2 kg
Supplied accessories Parts for installation and
connections (1 set)
Front panel case (1)
Design and specifications are subject to change without
notice.
MICROFILM

– 2 –
Solder bridge
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINE
WITH MARK !ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
SERVICE NOTE
CAUTION
Use of controls or adjustments or performance of proce-
dures other than those specified herein may result in haz-
ardous radiation exposure.
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.
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown and also use
the procedure in the printed matter which is included in the repair
parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission, ob-
serve from more than 30 cm away from the objective lens.
NOTES ON PICK-UP FLEXIBLE BOARD
The pick-up flexible board in this set is secured to the optical pick-
up with an adhesive tape. Once the tape is removed, an adhering
force becomes weak, and it cannot be reused.
Therefore, if the optical pick-up is replaced, replace also the pick-
up flexible board with a new one.
– main board (side B) –
NOTEFORREPLACEMENT OF COMPLETEMAINBOARD
The complete MAIN board (A-3294-597-A) of this set can be set to
address the specification for each destination by shorting or open-
ing one solder bridge of the MAIN board on theAEP and UK mod-
els and German models :
AEP and UK models : short
German model : open
The solder bridge below shold be opened when replacing the com-
plete MAIN board on the German model.

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TABLE OF CONTENTS
1. GENERAL
Location of controls................................................................. 4
Getting Started......................................................................... 4
Setting the clock ...................................................................... 4
CD Player ................................................................................ 5
Radio ....................................................................................... 5
RDS ......................................................................................... 6
Other Functions ....................................................................... 7
CD/MD Unit ............................................................................ 8
Connections ........................................................................... 10
2. DISASSEMBLY
2-1. Cover ................................................................................. 12
2-2. Front Panel Assy ............................................................... 12
2-3. Sub Panel Assy .................................................................. 13
2-4. CD Mechanism Block .......................................................13
2-5. Main Board ....................................................................... 14
2-6. Heat Sink ........................................................................... 14
2-7. Chassis (T) Sub Assy ........................................................ 15
2-8. Lever Assy ......................................................................... 15
2-9. Servo Board ....................................................................... 16
2-10. Roller Assy ........................................................................ 16
2-11. Chassis (OP) (O/S) Assy ................................................... 17
2-12. Optical Pick-up Block .......................................................17
3. ELECTRICAL ADJUSTMENTS
Tuner Section......................................................................... 18
CD Section ............................................................................ 21
4. DIAGRAMS
4-1. IC Pin Description............................................................. 22
4-2. Block Diagram –CD Section–........................................... 25
4-3. Block Diagram –Tuner Section– ....................................... 27
4-4. Block Diagram –Display Section–.................................... 29
4-5. Circuit Boards Location .................................................... 31
4-6. Printed Wiring Boards –CD Mechanism Section–............33
4-7. Schematic Diagram –CD Mechanism Section– ................ 35
4-8. Printed Wiring Board –Main Section– .............................. 37
4-9. Schematic Diagram –Main Section (1/3)– ........................ 41
4-10. Schematic Diagram –Main Section (2/3)– ........................ 43
4-11. Schematic Diagram –Main Section (3/3)– ........................ 45
4-12. Schematic Diagram –Relay Section–................................ 46
4-13. Printed Wiring Board –Relay Section– ............................. 47
4-14. Printed Wiring Board –Display Section– .......................... 49
4-15. Schematic Diagram –Display Section–............................. 51
5. EXPLODED VIEWS
5-1. Chassis Section ................................................................. 57
5-2. Front Panel Section ........................................................... 58
5-3. CD Mechanism Section (1) ............................................... 59
5-4. CD Mechanism Section (2) ............................................... 60
5-5. CD Mechanism Section (3) ............................................... 61
6. ELECTRICAL PARTS LIST ........................................ 62

– 4 –
SECTION 1
GENERAL This section is extracted
from instruction manual.

– 5 –

– 6 –

– 7 –

– 8 –

– 9 –

– 10 –

– 11 –

– 12 –
3 Push the bearing (L).
4 front panel assy
1 Push the button (open).
2 Push the bearing (R).
1 claw
4 cover
2 claw
3 claws
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. COVER
2-2. FRONT PANEL ASSY

– 13 –
5 PTT 2.6x6
1 PTT 2.6x6
6 PTT 2.6x
6
2 PTT 2.6x6
3 CNP700
7 bracket (M/D)
4 CD mechanism block
3 PTT 2.6x6
7 sub panel assy
6 CNP800
5 claw
1 PTT 2.6x6
2 PTT 2.6x6
4 claws
2-4. CD MECHANISM BLOCK
2-3. SUB PANEL ASSY

– 14 –
2 PTT 2.6x12
5 heat sink
1 PTT 2.6x8
3 PTT 2.6x8
4 PTT 2.6x8
4 ground point screws
(PTT 2.6x6)
5 ground point screw
(PTT 2.6x6)
1 PTT 2.6x8
6 MAIN board
3 PTT 2.6x
8
2 PTT 2.6x8
2-5. MAIN BOARD
2-6. HEAT SINK

– 15 –
5 guide (disc)
1 PS 2x4
6 lever (R) assy
7 lever (L) assy
2 DISC IN SW board
4 claws
3 tension spring (LR)
2 P 2x3
5 chassis (T) sub assy
1 P 2x3
4 claw
3 P 2x3
2-7. CHASSIS (T) SUB ASSY
2-8. LEVER ASSY

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5 LOAD SW board
4 PS 2x3
1 tension spring (RA)
2 arm (roller)
3 roller assy
washer arm washer
Fig. 1
armwashers
5 PS 2x4
1 CN3
3 P 2x3
4 loading motor assy
7 SERVO board
2 CN2
6 PS 2x4
2-9. SERVO BOARD
2-10. ROLLER ASSY
• When installing, take note of the positions
arm (roller) and washers. (Fig. 1)

– 17 –
1 P 2x3
2 sled motor assy
3 optical pick-up bloc
k
7 chassis (OP) (O/S) ass
y
9 compression spring (FL)
5 Fit lever (D) in the
direction of the arrow.
3 damper (T)
4 damper (T)
6 Turn loading ring in the
direction of the arrow.
1 tension spring (angle)
8 compression spring (FL)
2 tension spring (KR1)
2-11. CHASSIS (OP) (O/S) ASSY
2-12. OPTICAL PICK-UP BLOCK

– 18 –
SHUF
SHUF
SHUF
FM RF signal
generator
0.01
µ F
antenna
terminal
set
SECTION 3
ELECTRICAL ADJUSTMENTS
Carrier frequency : 98.00 MHz
Output level : 22 dB (12.6 µ V)
Mode : mono
Modulation : 1 kHz, 22.5 kHz deviation (30%)
Procedure :
1. Set to the test mode.
2. Push the SOURCE button and set to FM.
Display
FM Auto Scan/Stop Level Adjustment
Setting :
D-BASS switch : OFF
SOURCE button : FM
3. Push the preset 3 button.
Display
TUNER SECTION 0 dB = 1 µV
Cautions during repair
When the tuner unit is defective, replace it by a new one
because its internal block is difficult to repair.
TEST MODE
This set have the test mode function. In the test mode, FM Auto
Scan/Stop Level and MW Auto Scan/Stop Level adjustments can
be performed easier than it in ordinary procedure.
<Set the Test Mode>
1. Set the “OFF” mode.
2. Push the preset 4 button.
3. Push the preset 5 button.
4. Press the preset 1 button for more than two seconds.
5. Then the display indicates all lights, the test mode is set.
<Release the Test Mode>
1. Push the OFF button.
Note on Adjustment
The adjustments of tuner section, should be performed according
to the following sequence.
1. FM Auto Scan/Stop Level Adjustment
2. FM Stereo Separation Adjustment
3. FM RDS S-Meter Adjustment
4. MW Auto Scan/Stop Level Adjustment
4. Adjust with the volume RV2 on TU601 so that the “FM”
indication turns to “FM0” indication on the display window.
But, in case of already indicated “FM0”, turn the RV2 so that
put out light “0” indication and adjustment.
Display
Adjustment Location : See page 20.

– 19 –
SHUF
SHUF
FM RF signal
generator
0.01
µ F
antenna
terminal
set
+
–
FM RF signal
generator
0.01 µ F
antenna
terminal
set
LINE OUT REAR
10 k Ω
level meter
FM Stereo Separation Adjustment
Setting :
D-BASS switch : OFF
SOURCE button: FM
Carrier frequency : 98.00 MHz
Output level : 70 dB (3.2 mV)
Mode : stereo
Modulation : main : 1 kHz, 20 kHz deviation (26.5%)
sub : 1 kHz, 20 kHz deviation (26.5%)
19 kHz pilot : 7.5 kHz deviation (10%)
FM stereo Level meter Level meter
signal generator connection reading (dB)
output channel
L-CH L-CH A
B
R-CH L-CH Adjust RV4 on TU601
for nimum reading.
R-CH R-CH C
D
L-CH R-CH Adjust RV4 on TU601
for minimum reading.
L-CH stereo separation : A– B
R-CH stereo separation : C– D
The separations of both channels should be equal.
Specification : Separation more than 28 dB
Adjustment Location : See page 20.
Procedure :
Carrier frequency : 98.00 MHz
Output level : 35 dB (56.2 µ V)
Mode : mono
Modulation : no modulation
Procedure :
1. Set to the test mode. (See page 18.)
2. Push the SOURCE button and set to FM.
Display
FM RDS S-Meter Adjustment
Setting :
D-BASS switch : OFF
SOURCE button : FM
3. Push the preset 10 button.
4. Adjust RV801 so that the display indication is “16.0”.
Display
Specification : Display indication : 15.8 to 16.2
Adjustment Location : See page 20.

– 20 –
AM RF signal
generator AM dummy
antenna (50
Ω )
set
antenna
terminal
30
Ω
15 pF
65 pF
TU601
RV1
MW AUTO SCAN/
STOP LEVEL ADJ
RV2
FM AUTO SCAN/
STOP LEVEL ADJ
RV801
FM RDS
S-METER ADJ
RV4
FM STEREO
SEPARATION ADJ
(NARROW)
TP
SHUF
TP
SHUF
TP
SHUF
MW Auto Scan/Stop Level Adjustment
Setting :
D-BASS switch : OFF
SOURCE nMODE button : MW
Carrier frequency : 999 kHz
30% amplitude
modulation by
1 kHz signal
output level : 33 dB (44.7 µ V)
Procedure :
1. Set to the test mode. (See page 18.)
2. Push the SOURCE button.
3. Push the MODE button and set to MW.
Display
4. Push the preset 3 button.
Display
5. Adjust with the volume RV1 on TU601 so that the “MW”
indication turns to “MW0” indication on the display window.
But, in case of already indicated “MW0”, turn the RV1 so that
put out light “0” indication and adjustment.
Display
Adjustment Location : tuner unit (TU601)
Adjustment Location : tuner unit (TU601)