Sony CDX-4480ESP - Am/fm Compact Disc Changer User manual

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Model Name Using Similar Mechanism NEW
CD Drive Mechanism Type MG-363W-121
Optical Pick-up Name KSS-520A
SERVICE MANUAL
E Model
CDX-4480ESP
FM/AM COMPACT DISC PLAYER
MICROFILM
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 FM tuning interval:
50 kHz/200 kHz switchable
87.5 - 108.0 MHz
(at 50 kHz step)
87.5 - 107.9 MHz
(at 200 kHz step)
Antenna terminal External antenna connector
Intermediate frequency 10.7 MHz
Usable sensitivity 8 dBf
Selectivity 75 dB at 400 kHz
Signal-to-noise ratio 65 dB (stereo),
68 dB (mono)
Harmonic distortion at 1 kHz0.5% (stereo),
0.3% (mono)
Separation 35 dB at 1 kHz
Frequency response 30 - 15,000 Hz
Capture ratio 2 dB
AM
Tuning range AM tuning interval:
9 kHz/10 kHz switchable
531 - 1,602 kHz
(at 9 kHz step)
530 - 1,710 kHz
(at 10 kHz step)
Antenna terminal External antenna connector
Intermediate frequency 10.71 MHz/450 kHz
Sensitivity 30 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 antenna relay
control lead
Power amplifier control
lead
TelephoneATT control
lead
Tone controls Bass ±10 dB at 100 Hz
Treble ±10 dB at 10 kHz
Power requirements 12V DC car battery
(negative ground)
Dimensions Approx. 178 ×50 ×185 mm
(w/h/d)
Mounting dimensions 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.

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NOTES ON CLEANING THE OBJECTIVE LENS
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.
cotton swabs
objective lens
2-axis actuator
2-axis cover
slide base
optical pick-up
surface of objective lens
Notes:
Do not force to push the objective lens. Otherwise, the plate spring
supporting the objective lens will be bent, causing a deteriorated
RF waveform.
Never touch anything other than the objective lens. Otherwise, a
significant deterioration occurs in the RF waveform.
ApplyCDlenscleaner B-4(Part No.:J-2501-000-A)to cottonswabs
(narrowtype)(Part No.:J-2501-023-A)to belightly wet.Use aforce
(about 5 g (0.18 oz)) to make the objective lens in contact with the
bottom lightly, and clean the lens by spirals as following below.
Replace the cotton swab and repeat this cleaning two or three times.
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.

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TABLE OF CONTENTS
1. GENERAL
Location of Controls.................................................................. 4
Getting Started........................................................................... 4
Setting the Clock ....................................................................... 5
CD Player .................................................................................. 5
Radio ......................................................................................... 6
Other Functions ......................................................................... 7
Connections ............................................................................... 9
2. DISASSEMBLY
2-1. Cover Assy ...........................................................................11
2-2. Front Panel Assy ..................................................................11
2-3. Sub Panel (1)Assy .............................................................. 12
2-4. CD Mechanism Block ......................................................... 12
2-5. Main Board ......................................................................... 13
2-6. Heat Sink ............................................................................. 13
2-7. Chassis (T) SubAssy .......................................................... 14
2-8. Lever Assy........................................................................... 14
2-9. Servo Board......................................................................... 15
2-10. Roller Assy .......................................................................... 15
2-11. Chassis (OP) (O/S) Assy ..................................................... 16
2-12. Optical Pick-up Block ......................................................... 16
3. ELECTRICAL ADJUSTMENTS
Tuner Section........................................................................... 17
4. DIAGRAMS
4-1. IC Pin Descriptions ............................................................. 19
4-2. Circuit Boards Location ...................................................... 26
4-3. Block Diagram –CD Section–............................................. 27
4-4. Block Diagram –Main Section–.......................................... 29
4-5. Schematic Diagram –CD Mechanism Section–.................. 31
4-6. Printed Wiring Boards –CD Mechanism Section–.............. 35
4-7. Printed Wiring Board –Main Section– ................................ 40
4-8. Schematic Diagram –Main Section–................................... 45
4-9. Printed Wiring Board –Display Section– ............................ 49
4-10. 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

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SECTION 1
GENERAL This section extracted from
instruction manual.

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SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. COVER ASSY
2-2. FRONT PANEL ASSY
4 cover assy
1 claw
2 claw
3 claws
2 front panel assy
1 button (release)

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

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2-5. MAIN BOARD
2-6. HEAT SINK
2 ground point screw
(PTT 2.6 X 6)
3 ground point screws
(PTT 2.6 X 6)
1 PTT 2.6x8
4 MAIN board
1 PTT 2.6x8
2 PTT 2.6x10
3 PTT 2.6x8
4 heat sink

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

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2-9. SERVO BOARD
2-10. ROLLER ASSY
• When installing, take note of the positions
arm (roller) and washers. (Fig.1)
2 PS 2x5
3 PS 2x5
!¡ PS 2x5
4 heat sink
1 PTT 2.6x5
0 CN4
6 P 2x3
7 loading motor assy
!™ SERVO board
5 wire
8 CN2
9 CN5
Fig. 1
4 PS 2x4
5 LOAD SW board
1 tension spring (RA)
2 arm (roller)
3 roller assy
washer arm arm
washer washers

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

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SECTION 3
ELECTRICAL ADJUSTMENTS
FM SENS/IF Adjustment
Setting:
SOURCE button : FMI
D-BASS switch : OFF
FREQUENCY SELECT switch : FM 200K
Procedure:
Adjust for a maximum reading on level meter.
FEB1
87.5 MHz
Adjustment Location: See page 18.
AM SENS Adjustment
Setting:
SOURCE nMODE button : AM
D-BASS switch : OFF
FREQUENCY SELECT switch : AM 10K
CD SECTION
CD section adjustments are done automatically in this set.
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 Center Adjustment
Setting:
SOURCE button : FMI
D-BASS switch : OFF
FREQUENCY SELECT switch : FM 200K
FM RF signal
generator dummy
antenna antenna
terminal
set
50
Ω
50 Ω
Carrier frequency: 97.9 MHz
Output lever : 60 dB (1 mV)
Mode : mono
Modulation : 1 kHz, 75 kHz deviation (100%)
+
–
FM CENTER
OUT
(Both side
of R24.)
IC1 pin
#¶
IC1 pin #¢
digital
voltmete
r
0 dBs
–3 dBs
(fc–10) fc (fc+10) (kHz
)
FM RF signal
generator dummy
antenna
50
Ω
50 Ω
4 Ω
antenna
terminal
set
SPEAKER OUT
+
–
level
meter
AM RF signal
generator dummy
antenna antenna
terminal
set
SPEAKER OUT
level
meter
+
–
30 Ω
4 Ω
15 pF
30 pF
Procedure:
Adjust for a maximum reading on level meter.
IFT1, 3
1,400 kHz
Adjustment Location: See page 18.
Procedure:
1. Adjust IFT4 on TU1 so that the reading on the digital voltmeter
becomes in 0 ±30 mV.
2. Output an Fcenter 10 dB signal output from FM RF signal
generator so that the speaker out terminal is –20 dBs.
3. Change the FM RF signal generator frequency and check the
deviation of the frequency on + side and – side when the speaker
out terminal drops 3 dB. (Both + side and – side is approx.
50 kHz.)
4. Re-adjust IFT4 on TU1 when the difference deviation of the
frequency does more than 10 kHz.
Adjustment Location: See page 18.

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Carrier frequency: 1000 kHz
30% amplitude
modulation by
1 kHz signal
output level : 33 dB (44.7 µ V)
Procedure:
1. Adjust IFT3 on TU1 so that the reading on the digital
voltmeter is 1.5 ±0.2 V.
Adjustment Location: tuner assy (TU1)
AM Auto Scan/Stop Level Adjustment
Setting:
SOURCE nMODE button : AM
D-BASS switch : OFF
FREQUENCY SELECT switch : AM 10K
AM RF signal
generator dummy
antenna antenna
terminal
set
SPEAKER OUT
level
meter
+
–
30 Ω
4 Ω
15 pF
30 pF
+
–
digital
voltmeter
S-METER OUT
Adjustment Location: tuner assy (TU1)
– tuner assy (TU1) (component side) –
AM AUTO
SCAN/STOP
LEVEL ADJ
IFT3
AM SENS
ADJ
IFT3 IFT1
FEB1
FM SENS/IF
ADJ
IFT4
FM CENTER
ADJ
– tuner assy (TU1) (conductor side) –
IC1 R24
S-METER
OUT
FM CENTER
OUT
‘
’

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SECTION 4
DIAGRAMS
4-1. IC PIN DESCRIPTIONS
• IC5 CXP84640-003Q (CD SYSTEM CONTROL)
Pin No. Pin Name I/O Pin Description
1 – 7 NCO — Not used in this set.
8 LINKOFF I Bus interface link input (Not used in this set.)
9 DRV OE O Focus/tracking coil/sled motor control output
10 D SW I Down switch input (SW4)
11 – 13 NCO — Not used in this set.
14 LM EJ O Loading motor control output
15 LM LOD O Loading motor control output
16 EMPH O O De-emphasis ON/OFF control output
17 CDMON O CD mechanism deck power control output
18 CD ON O CD power control output
19 A MUT O System attenuate control output
20 LD ON O Lazer power ON/OFF control output
21 CD RST O CD system reset output
22 – 24 — — Not used in this set.
25 PH3 I Not used in this set.
26 TSTIN0 I Not used in this set.
27 TSTIN1 I Not used in this set.
28 TST CLV I Not used in this set.
29 NCO — Not used in this set.
30 RESET I System reset input (“L” = Reset)
31 X IN I X’tal oscillator input of system clock. (10 MHz)
32 X OUT O X’tal oscillator output of system clock. (10 MHz)
33 GND — Analog GND
34 XT OUT O Not used in this set.
35 XT IN I Not used in this set.
36 AVSS — A/D converter GND
37 AVREF I A/D converter reference voltage input
38 TEP L I Not used in this set.
39 TEP H I Not used in this set.
40 NCO — Not used in this set.
41 PH2 I Not used in this set.
42 SCLK O CD-TEXT data read clock output
43 ESPXQOK O XQOK signal output to DRAM controller.
44 ESPSDT I Serial data input from DRAM controller.
45 GRSRST O Reaet signal output to DRAM controller.
46 GRSCOR I Sub-cord sync input from DRAM controller.
47 CD XLAT O CD signal process serial latch output
48 TX CLK O EEPROM serial clock output (Not used in this set.)
49 TX DATA O EEPROM serial data output (Not used in this set.)
50 UNISO O Not used in this set.
51 BUS CLK I/O Bus system serial clock input/output
52 BUS SI I Bus system serial interface input
53 BUS SO O Bus system serial interface output
54 F OK I Focus OK signal input
55 GFS I GFS signal detection input
56 SCOR O Sub-cord sync output
57 SENS I SENS signal input
58 — I Fixed at “H” in this set.
59 CD CKO O CD signal process serial clock output
60 BU.IN I Back-up power detection input
61 BUSON I Bus on control input

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Pin No. Pin Name I/O Pin Description
62 IN SW I Disc in switch input (SW1)
63 SELF SW I Self switch input (SW2)
64 TX CE O EEPROM chip enable output (Not used in this set.)
65 SCK2 O Sub Q read clock output
66 SI2 I Sub Q 80 bit, PCM peak and level data 16 bit input
67 CD DATA O CD signal process serial data output
68 ESPXWRE O Write signal output to DRAM controller.
69 ESPXRDE O Read signal output to DRAM controller.
70 ESPXLT O Serial data latch output to DRAM controller.
71 ESPXSOE O XSOE signal output to DRAM controller.
72 VDD — Power supply
73 HIN I Fixed at “H” in this set.
74 TEXT.ON/OFF I Fixed at “H” in this set.
75 PH1 I Not used in this set.
76 FBTBSEL I Not used in this set.
77 CDOSEL I Not used in this set.
78 – 80 — — Not used in this set.