Sony CDX-3170 Service manual
CDX-3170
SERVICE MANUAL
SPECIFICATIONS
E Model
Model Name Using Similar Mechanism CDX-2180
CD Drive Mechanism Type MG-363X-121
Optical Pick-up Name KSS-521A
CD player section
System Compact disc digital audio
Signal-to-noise ratio 90 dB
Frequency response 10 - 20,000 Hz
Wow and flutter Below measurable limit
T uner section
FM
Tuning range 87.5 - 107.9 MHz
Antenna terminal External antenna connector
Intermediate frequency 10.7 MHz
Usable sensitivity 13 dBf
Selectivity 70 dB at 400 kHz
Signal-to-noise ratio 62 dB (stereo),
Harmonic distortion at 1 kHz
Separation 33 dB at 1 kHz
Frequency response 30 - 15,000 Hz
Capture ratio 2 dB
AM
Tuning range 530 - 1,710 kHz
Antenna terminal External antenna connector
Intermediate frequency 450 kHz
Sensitivity 32 µV
system
65 dB (mono)
1.0% (stereo),
0.5% (mono)
Power amplifier section
Outputs Speaker outputs
Speaker impedance 4 - 8 ohms
Maximum power output 35 W × 4 (at 4 ohms)
General
Outputs Line outputs (2)
Tone controls Bass ± 10 dB at 100 Hz
Power requirements 12 V DC car battery
Dimensions Approx. 188 × 58 × 180 mm
Mounting dimensions Approx. 183 × 53 × 163 mm
Mass Approx. 1.3 kg
Supplied accessories Parts for installation and
Design and specifications are subject to change without
notice.
(sure seal connectors)
Power antenna relay
control/Power amplifier
control lead
Treble ± 10 dB at 10 kHz
(negative ground)
(w/h/d)
(w/h/d)
connections (1 set)
MICROFILM
FM/AM COMPACT DISC PLAYER
– 1 –
SERVICE NOTE
TABLE OF CONTENTS
CAUTION
Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous 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 objecti ve lens in the optical pic k-up
block. Therefore, when checking the laser diode emission, observe
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 remov ed, 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.
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 PAR TS WHOSE
P AR T NUMBERS APPEAR AS SHO WN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
1. GENERAL
Location of Controls................................................................ 3
Getting Started......................................................................... 3
Setting the Clock ..................................................................... 4
CD Player ................................................................................ 4
Radio ....................................................................................... 4
Other Functions .......................................................................5
Connections .............................................................................6
2. DISASSEMBLY
2-1. Cover Assy ..........................................................................8
2-2. Front Panel Assy .................................................................8
2-3. Sub Panel.............................................................................9
2-4. CD Mechanism Block ......................................................... 9
2-5. Main Board ....................................................................... 10
2-6. Heat Sink ........................................................................... 10
2-7. Chassis (T) Sub Assy ........................................................ 11
2-8. Lever Assy ......................................................................... 11
2-9. Servo Board....................................................................... 12
2-10. Roller Assy........................................................................ 12
2-11. Chassis (OP) (O/S) Assy ................................................... 13
2-12. Optical Pick-up Block ....................................................... 13
3. ELECTRICAL ADJUSTMENTS
Tuner Section.........................................................................14
CD Section ............................................................................ 18
4. DIAGRAMS
4-1. IC Pin Description............................................................. 19
4-2. Circuit Boards Location ....................................................21
4-3. Printed Wiring Boards –CD Mechanism Section–............23
4-4. Schematic Diagram –CD Mechanism Section– ................ 25
4-5. Printed Wiring Boards –Display Section– ........................ 27
4-6. Schematic Diagram –Display Section–............................. 29
4-7. Printed Wiring Board –Main Section– .............................. 31
4-8. Schematic Diagram –Main Section (1/2)– ........................ 33
4-9. Schematic Diagram –Main Section (2/2)– ........................ 35
5. EXPLODED VIEWS
5-1. Chassis Section ................................................................. 40
5-2. Front Panel Section ........................................................... 41
5-3. CD Mechanism Section (1) ............................................... 42
5-4. CD Mechanism Section (2) ............................................... 43
5-5. CD Mechanism Section (3) ............................................... 44
6. ELECTRICAL PARTS LIST ........................................ 45
– 2 –
– 3 –
SECTION 1
GENERAL
This section extracted from
instruction manual.
– 4 –
– 5 –
– 6 –
– 7 –
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the n umerical order given.
2-1. COVER ASSY
2
claw
5
cover assy
4
claws
1
PTT 2.6x6
3
claw
2-2. FRONT PANEL ASSY
2
front panel assy
1
Push the RELEASE button
– 8 –
2-3. SUB PANEL
1
PTT 2.6x6
3
sub panel
2
PTT 2.6x6
2-4. CD MECHANISM BLOCK
5
CD mechanism block
8
bracket (MD)
1
PTT 2.6x6
6
PTT 2.6x6
2
PTT 2.6x6
7
PTT 2.6x6
3
PTT 2.6x6
– 9 –
4
PTT 2.6x6
2-5. MAIN BOARD
2
screws (+BTT)
1
PTT 2.6x6
3
MAIN board
2-6. HEAT SINK
2
PTT 2.6x8
3
heat sink
1
PTT 2.6x8
– 10 –
2-7. CHASSIS (T) SUB ASSY
1
Unsolder the
lead wires.
red
white
black
3
P 2x3
2
P 2x3
4
chassis (T) sub assy
2-8. LEVER ASSY
6
lever (R) assy
3
tension spring (LR)
7
lever (L) assy
5
guide (disc)
1
PS 2x4
2
DISC IN SW board
4
claws
– 11 –
2-9. SERVO BOARD
4
loading motor assy
3
5
P 2x3
PS 2x4
1
CN3
6
PS 2x4
2
CN2
7
SERVO board
2-10. ROLLER ASSY
• When installing, take note of the positions
arm (roller) and washers. (Fig. 1)
4
PS 2x3
5
LOAD SW board
washer
arm
washer
3
2
Fig. 1
roller assy
arm (roller)
washers
arm
1
tension spring (RA)
– 12 –
2-11. CHASSIS (OP) (O/S) ASSY
8
compression spring (FL)
1
tension spring (angle)
7
9
compression spring (FL)
2
tension spring (KR1)
5
Fit lever (D) in the
direction of the arrow.
chassis (OP) (O/S) assy
6
Turn loading ring in the
direction of the arrow.
4
damper (T)
2-12. OPTICAL PICK-UP BLOCK
1
P 2x3
2
sled motor assy
3
damper (T)
3
optical pick-up block
– 13 –
SECTION 3
r
r
)
ELECTRICAL ADJUSTMENTS
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.
FM VT Volta ge Adjustment
Setting :
SOURCE button : FMI
FM RF signal
generator
FM VT OUT
dummy
antenna
50
50
Ω
digital
voltmete
+
–
antenna
terminal
Ω
set
Procedure :
Adjust for following value reading on digital voltmeter.
Frequency Display 87.5 MHz 107.9 MHz
Reading on Digital voltmeter 1.42 ± 0.05 V 7.2 ± 0.5 V
Adjustment Part T4 (confirmation)
Adjustment Location : See page 17.
FM Center Adjustment
Setting :
SOURCE button : FMI
FM RF signal
generator
Carrier frequency: 97.9 MHz
Output level : 60 dB (1 mV)
Mode : mono
Modulation : 1 kHz, 75 kHz deviation (100 %)
FM CENTER
OUT
(Both side or R32.)
dummy
antenna
50
IC2 pin
IC2 pin
50
Ω
antenna
terminal
Ω
set
digital
voltmete
!‡
!‹
+
–
Procedure :
1. Adjust T5 on TU1 so that the reading on the digital voltmeter
becomes in 0 ± 50 mV.
2. Output an Fcenter 10 dB signal output from FM RF signal
generator so that the LINE OUT REAR jack is –20 dBs.
3. Change the FM RF signal generator frequency and check the
deviation of the frequency on + side and – side when the LINE
OUT REAR jack drops 3 dB. (Both + side and – side is approx.
50 kHz.)
4. Re-adjust T5 on TU1 when the difference deviation of the
frequency does more than 10 kHz.
0 dBs
–3 dBs
(fc–10) fc (fc+10) (kHz
Adjustment Location : See page 17.
– 14 –
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