SONY CDX-C7000X, CDX- C7050X Service Manual
CDX-C7000X/C7050X
SERVICE MANUAL
Photo: CDX-C7050X
• The tuner and CD sections have no adjustments.
SPECIFICATIONS
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
19 watts per channel minimum continuous average power into
4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more
than 1% total harmonic distortion.
Other Specifications
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
Laser Diode Properties
Material GaAlAs
Wavelength 780 nm
Emission Duration Continuous
Laser output power Less than 44.6 µW*
* This output is the value measured at a distance
of 200 mm from the objective lens surface on the
Optical Pick-up Block.
Tuner section
FM
Tuning range 87.5 – 107.9 MHz
Antenna terminal External antenna connector
Intermediate frequency 10.7 MHz/450 kHz
Usable sensitivity 8 dBf
Selectivity 75 dB at 400 kHz
Signal-to-noise ratio 66 dB (stereo),
Harmonic distortion at 1 kHz
Separation 35 dB at 1 kHz
Frequency response 30 – 15,000 Hz
AM
Tuning range 530 – 1,710 kHz
Antenna terminal External antenna connector
Intermediate frequency 10.7 MHz/450 kHz
Sensitivity 30 µV
system
72 dB (mono)
0.6% (stereo),
0.3% (mono)
US Model
Model Name Using Similar Mechanism CDX-C5050X/C5055
CD Drive Mechanism Type MG-383Z-121//K
Optical Pick-up Name KSS-720A
Power amplifier section
Outputs Speaker outputs
Speaker impedance 4 – 8 ohms
Maximum power output 50 W × 4 (at 4 ohms)
General
Outputs Audio outputs
Tone controls Bass ±9 dB at 100 Hz
Power requirements 12 V DC car battery
Dimensions Approx. 178 × 50 × 183 mm
Mounting dimensions Approx. 182 × 53 × 162 mm
Mass Approx. 1.2 kg (2 lb. 10 oz.)
Supplied accessories Parts for installation and
Design and specifications are subject to change without
notice.
(sure seal connectors)
Power antenna relay
control lead
Power amplifier control
lead
Telephone ATT control
lead
Treble ±9 dB at 10 kHz
(negative ground)
(7
1/8 × 2 × 7 1/4 in.)
(w/h/d)
(7
1/4 × 2 1/8 × 6 1/2 in.)
(w/h/d)
connections (1 set)
Front panel case (1)
Card remote commander RM-X91
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 objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
P ART NUMBERS APPEAR AS SHOWN IN THIS MANU AL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
1. GENERAL
Location of controls................................................................. 3
Getting Started......................................................................... 3
Setting the clock ...................................................................... 3
CD Player CD/MD Unit (optional) ......................................... 4
Radio ....................................................................................... 5
Other Functions ....................................................................... 6
TV/Video (optional) ................................................................ 7
Connections ............................................................................. 8
2. DISASSEMBLY
2-1. Sub Panel (CD) Assy.........................................................10
2-2. CD Mechanism Block ....................................................... 10
2-3. Main Board ....................................................................... 11
2-4. Heat Sink ...........................................................................11
2-5. Chassis (T) Sub Assy ........................................................ 12
2-6. Lever Section..................................................................... 12
2-7. Servo Board....................................................................... 13
2-8. Shaft Roller Assy .............................................................. 13
2-9. Floating Block Assy .......................................................... 14
2-10. Optical Pick-up Block ....................................................... 14
3. DIAGRAMS
3-1. IC Pin Descriptions ........................................................... 15
3-2. Block Diagram –CD Section–........................................... 21
3-3. Block Diagram –Tuner Section–....................................... 22
3-4. Block Diagram –Display Section–.................................... 23
3-5. Circuit Boards Location .................................................... 23
3-6. Printed Wiring Boards –CD Mechanism Section–............ 24
3-7. Schematic Diagram –CD Mechanism Section (1/2)– ....... 26
3-8. Schematic Diagram –CD Mechanism Section (2/2)– ....... 27
3-9. Schematic Diagram –Main Section (1/2)– ........................ 28
3-10. Schematic Diagram –Main Section (2/2)– ........................ 29
3-11. Printed Wiring Board –Main Section– .............................. 30
3-12. Printed Wiring Board –Relay Section– ............................. 31
3-13. Schematic Diagram –Relay Section–................................ 32
3-14. Schematic Diagram –Display Section–............................. 33
3-15. Printed Wiring Board –Display Section– .......................... 34
3-16. IC Block Diagrams............................................................ 35
4. EXPLODED VIEWS
4-1. Chassis Section ................................................................. 38
4-2. Front Panel Section ........................................................... 39
4-3. CD Mechanism Section (1) ............................................... 40
4-4. CD Mechanism Section (2) ............................................... 41
4-5. CD Mechanism Section (3) ............................................... 42
5. ELECTRICAL PARTS LIST ........................................ 43
2
SECTION 1
GENERAL
This section is extracted from
instruction manual (CDX-C7050X).
3
45678910
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. SUB PANEL (CD) ASSY
4 two claws
6 sub panel (CD) assy
2 PTT 2.6x6
2-2. CD MECHANISM BLOCK
5 CD mechanism block
2 PTT 2.6x6
3 claw
5 CNP800
1 PTT 2.6x6
7 bracket (CD)
6 PTT 2.6x6
3
1 PTT 2.6x6
4 CNP701
2-3. MAIN BOARD
5 PTT 2.6x6
6 MAIN board
4 PTT 2.6x6
3 PTT 2.6x8
2 PTT 2.6x8
1 PTT 2.6x8
2-4. HEAT SINK
7 heat sink
6 PTT 2.6x8
5 PTT 2.6x8
4 PTT 2.6x8
3 PTT 2.6x12
2 PTT 2.6x8
1 PTT 2.6x8
11
2-5. CHASSIS (T) SUB ASSY
2 P 2x3
3 P 2x3
1 Unsolder the
lead wires.
2-6. LEVER SECTION
4 chassis (T) sub assy
black
red
white
4 claws
5 guide (disc)
6 lever (R)
3 tension spring (LR)
7 lever (L)
1 screw
2 DISC IN SW board
12
r
2-7. SERVO BOARD
7 PS 2x4
6 PS 2x4
3 Removal the solders.
4 P 2x3
5 loading motor assy
2-8. SHAFT ROLLER ASSY
• When installing, take note of the positions
arm (roller) and washers. (Fig. 1)
2 CN2
1 CN3
8 SERVO board
3 retaing ring (RA)
4 shaft retainer
shaft retainer
retaing ring (RA)
arm
washer
5 shaft roller assy
2 arm (roller)
Fig. 1
washer
arm
shaft retaine
1 tension spring (RA)
13
2-9. FLOATING BLOCK ASSY
7 compression spring (FL)
1 tension spring (KF1)
6 floating block assy
8 compression spring (FL)
4 Fit lever (D) in the
direction of the arrow.
5 Turn loading ring in the
direction of the arrow.
3 damper (T)
2-10. OPTICAL PICK-UP BLOCK
1 P 2x3
2 sled motor assy
2 damper (T)
3 optical pick-up block
14
SECTION 3
DIAGRAMS
3-1. IC PIN DESCRIPTIONS
• IC501 CXD2598Q (DIGITAL SERVO, DIGITAL SIGNAL PROCESSOR) (SERVO BOARD)
Pin No. Pin Name I/O Pin Description
1 DVDD — Digital power supply pin
2 DVSS — Digital ground
3 SOUT O Servo brock serial data output (Not used.)
4 SOCK O Servo brock serial data read clock output (Not used.)
5 XOLT O Servo brock serial data latch output (Not used.)
6 SQSO O Sub Q 80 bit, PCM peak and level data output. CD TEXT data output
7 SQCK I Clock input from SQSO read output.
8 SCSY I Fixed at “L”.
9 SBSO O Serial output of sub-P to W. (Not used.)
10 EXCK I Clock input from SBSO read output. (Fixed at “L”)
11 XRST I System reset (“L”: Reset)
12 STSM I System mute input (Fixed at “L”)
13 DATA I Serial data input from CPU.
14 XLAT I Latch input from CPU. Latch serial data at the falling edge.
15 CLOK I Serial data transfer clock input from CPU.
16 SENS O SENS output for CPU.
17 SCLK I Clock input from SENS serial data read.
18 ATSK I/O Input/output for anti-shock.
19 WFCK O WFCK (Write Flame Clock) output (Not used.)
20 XUGF O XUGF output (Not used.)
21 XPCK O XPCK output (Not used.)
22 GFS O GFS output
23 C2PO O C2PO output (Not used.)
24 SCOR O “H” output at either detection, sub code sync S0 or S1.
25 C4M O 4.2336 MHz output (Not used.)
26 WDCK O Word clock output f=2Fs (Not used.)
27 COUT I/O Track number count signal input/output (Not used.)
28 MIRR I/O Mirror signal input/output (Not used.)
29 DVSS — Digital ground
30 DVDD — Digital power supply pin
31 DFCT I/O Diffect signal input/output (Not used.)
32 FOK I/O Focus OK signal input/output
33 PWM1 I External control input of spindle motor.
34 LOCK I/O Lock signal input/output
35 MDP O Servo control output of spindle motor.
36 SSTP I Disc most inner track detection signal input
37 FSTIO I/O 2/3 frequency division input/output of pins ih and ij. (Not used.)
38 SFDR O Sled drive output
39 SRDR O Sled drive output
40 TFDR O Tracking drive output
41 TRDR O Tracking drive output
42 FFDR O Focus drive output
43 FRDR O Focus drive output
44 DVDD — Digital power supply pin
45 DVSS — Digital ground
46 TEST I Test pin (Fixed at “L”.)
47 TES1 I Test pin (Fixed at “L”.)
48 XTSL I X’tal select input (“L”: 16.9344 MHz, “H”: 33.8688 MHz)
49 VC I Center voltage input
50 FE I Focus error signal input
51 SE I Sled error signal input
15
Pin No. Pin Name I/O Pin Description
52 TE I Tracking error signal input
53 CE I Center servo analog input
54 RFDC I RF signal input
55 ADIO O Test pin (Not used.)
56 AVSSO — Analog ground
57 IGEN I Constant current input from OP amplifier.
58 AVDDO — Analog ground
59 ASYO O EFM full-swing output (“L”: VSS, “H”: VDD)
60 ASYI I Asymmetry comparate voltage input
61 RFAC I EFM signal input
62 AVSS3 — Analog ground
63 CLTV I VCO control voltage input from master.
64 FILO O Filter output for master PLL (slave=digital PLL)
65 FILI I Filter input from master PLL.
66 PCO O Charge pump output for master PLL.
67 AVDD3 — Analog power supply pin
68 BIAS I Asymmetry circuit constant current input
69 VCTL I VCO2 control input from wideband EFM PLL. (Not used.)
70 V16M O VCO2 oscillator output for wideband EFM PLL. (Not used.)
71 VPCO O Charge pump output for wideband EFM PLL. (Not used.)
72 DVSS — Digital ground
73 MD2 I Digital out ON/OFF control input (“L”: OFF, “H”: ON)
74 DOUT O Digital out output
75 ASYE I Asymmetry circuit ON/OFF input (“L”: OFF, “H”: ON)
76 DVDD — Digital power supply pin
77 LRCK O D/A interface LR clock output (f=Fs)
78 LRCKI I D/A interface LR clock input
79 PCMD O D/A interface serial data output (2’s COMP, MSB fast)
80 PCMD I D/A interface serial data input (2’s COMP, MSB fast)
81 BCK O D/A interface bit clock output
82 BCKI I D/A interface bit clock input
83 EMPH O Emphasis ON/OFF signal output
84 EMPHI I Emphasis ON/OFF signal input (“H”: ON, “L”: OFF)
85 XVDD — Power supply for master clock.
86 XTAI I X’tal oscillator input from master clock (16.9344 MHz).
87 XTAO O X’tal oscillator output for master clock (16.9344 MHz).
88 XVSS — Ground pin for master clock.
89 AVDD1 — Analog power supply pin
90 AOUT1 O Lch analog output
91 AIN1 I Lch OPAMP input
92 LOUT1 O Lch LINE output
93 AVSS1 — Analog ground
94 AVSS2 — Analog ground
95 LOUT2 O Rch LINE output
96 AIN2 I Rch OPAMP input
97 AOUT2 O Rch analog output
98 AVDD2 — Analog power supply pin
99 RMUT O Rch “0” detect Flug (Not used.)
100 LMUT O Lch “0” detect Flug (Not used.)
16
• IC5 CXP84640-072Q (CD SYSTEM CONTROL) (SERVO BOARD)
Pin No. Pin Name I/O Pin Description
1 ITRPT — Not used in this set.
2, 3 — — Not used in this set.
4, 5 NCO — Not used in this set.
6 OPEN I Front panel open detection input
7 CLOSE O Front panel close control output
8 LINKOFF I Bus interface link input
9 NCO — Not used in this set.
10 D SW I Down switch input (SW1)
11 SSTP I Limit switch input (SW4)
12, 13 NCO — Not used in this set.
14, 15 — — Not used in this set.
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 Laser power ON/OFF control output
21 CD RST O CD system reset output
22 HOLD O Hold switch output
23 AGC CONT O AGC control output
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 from system clock. (10 MHz)
32 X OUT O X’tal oscillator output for system clock. (10 MHz)
33 GND — Analog ground
34 XT OUT O Not used in this set.
35 XT IN I Not used in this set.
36 AVSS — A/D converter ground
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 SLED– I Sled drive input
41 PH2 I Not used in this set.
42 SEK/SMET I Fixed at “H” in this set.
43 GFS/MNT2 SEL I Fixed at “H” in this set.
44 SC-JIG ON/OFF I Fixed at “H” in this set.
45 SCLK O CD-TEXT data read clock output
46 LOCK I/O Lock signal input/output
47 — — Not used in this set.
48 SCK2 O Sub Q read clock output
49 SI2 I Sub Q 80 bit, PCM peak and level data 16 bit input.
50 — — 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 TEST MODE I Fixed at “H” in this set.
17
Pin No. Pin Name I/O Pin Description
57 SENS I SENS signal input
58 — — Not used in this set.
59 — — Not used in this set.
60 BU.IN I Back-up power detection input
61 BUSON I Bus on control input
62 IN SW I Disc in switch input (SW3)
63 SELF SW I Self switch input (SW2)
64 SCOR O Sub-code sync output
65 CD-CKO O CD signal process serial clock output
66 LM LOD O Loading motor control output
67 CD DATA O CD signal process serial data output
68 CD-XLAT O CD signal process serial data latch output
69 LM-EJ O Loading motor control output
70 DRV-OE O Focus/tracking coil/sled motor control output
71 MD2 O Digital out ON/OFF control output (“L”: OFF, “H”: ON)
72 VDD — Power supply pin
73 NIH I Fixed at “H” in this set.
74 V/Z I Fixed at “H” in this set.
75 PH1 I Not used in this set.
76 — — Not used in this set.
77 DOUT-SEL I Fixed at “H” in this set.
78 – 80 — — Not used in this set.
18
• IC801 MN101C49KTB (SYSTEM CONTROL) (MAIN BOARD)
Pin No. Pin Name I/O Pin Description
1 VREF– — Ground for A/D converter power supply
2 S METER I S meter voltage detect signal input
3 FM AGC I FM auto gain control signal input
4 KEY IN1 I KEY signal input
5 KEY IN0 I KEY signal input
6 DSTSEL I Not used.
7 RC IN0 I Rotary commander signal input
8 FUNC SEL I Model function selection pin
9 NIL — Ground
10 VREF+ — A/D converter power supply
11 VDD — Power supply (+5 V) input pin
12 OSC OUT O High speed clock signal output (18.432 MHz)
13 OSC IN I High speed clock signal input (18.432 MHz)
14 VSS — Ground for power supply
15 XI I Low speed clock signal input (32 kHz)
16 XO O Low speed clock signal output (32 kHz)
17 MMOD — Not used. (Fixed at “L”.) Memory mode select signal input
18 RC IN1 I Rotary commander shift key signal input
19 SYSRST O System reset signal output
20 BUS ON O Bus on control signal output
21 LCD DATA O LCD serial data signal output
22 LCD CE O LCD chip enable signal output
23 LCD CLK O LCD serial clock signal output
24 ILL ON O Illumination power supply control signal output
25 DOOR IND O Control signal output for power on sub panel when open to front panel
26 KEY ACK I Key active interrupt detect signal input
27 NOSE I Front panel attachment detection input
28 BU IN I Back up power supply setect signal input
29 SIRCS I Remote control signal input
30, 31 NC — Not used. (Fixed at “L”.)
32 RAM — Not used.
33 RESET I Reset signal input
34 NC — Not used.
35 BEEP O Beep signal output
36 NC (FUNC SEL) I Model function selection pin
37 NC (FUNC SEL) I Model function selection pin
38 – 40 NC — Not used.
41 UNI CLI I Bus system serial clock signal input
42 UNI SO O Bus system serial interface signal output
43 UNI SI I Bus system serial interface signal input
44 UNI CLO O Bus system serial clock signal output
45 SDA I/O I2C bus serial data signal input/output
46 NC — Not used.
47 SCL O I2C bus serial clock signal output
48, 49 NC — Not used.
50 LOCK I Check when remove to lock of MDNO CLV SERVO
51 – 63 NC — Not used.
64 ACC IN I Accessory power supply voltage detection input
65 TEL MUT I Telephone attenuate detect signal input
66 TEST IN I Test mode setting detect first stage signal input
67 ANT CUT — Not used.
68 NC — Not used.
19
Pin No. Pin Name I/O Pin Description
69 AMP ON O Power supply on/off control signal output
70 MUT O System attenuate control signal output
71 AMP MUT O Power amp attenuate control signal output
72 VOL MUT O Mute control signal output for electrical volume
73 TU ON O Tuner attenuate signal output
74 EEP SDA I/O Tuner EEPROM serial data signal input/output
75 EEP SCL O Runer EEPROM serial clock signal output
76 IF BW I Not used.
77 NC — Not used. Tuner switch VCO level shift signal input
78 NC — Not used.
79 REIN1 I Rotary encoder signal input
80 REIN0 I Rotary encoder signal input
81 AD ON O Power control output for A/D conversion
82 – 92 NC — Not used.
93 OPEN I Front panel open/close condition signal input
94 – 98 NC — Not used.
99 PW ON O System power supply control signal output
100 NC — Not used.
20
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