Sony CDX-V7800X Service manual

CDX-V7800X

SERVICE MANUAL

Ver 1.1 2001.06

• The tuner and CD sections have no adjustments.

SPECIFICATIONS

E Model

Tourist Model

Model Name Using Similar Mechanism NEW

CD Drive Mechanism Type MG-383K-121//K

Optical Pick-up Name KSS-720A

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 Signal format system PAL/NTSC

Tuner section

Tuning range FM tuning interval:

50 kHz/200 kHz

switchable

87.5 – 108 MHz

(at 50 kHz step)

87.5 – 107.9 MHz

(at 200 kHz step) Aerial terminal External aerial connector Intermediate frequency 10.7 MHz/450 kHz Usable sensitivity 9 dBf Selectivity 75 dB at 400 kHz Signal-to-noise ratio 65 dB (stereo),

68 dB (mono) Harmonic distortion at 1 kHz

0.7% (stereo),

0.4% (mono) Separation 35 dB at 1 kHz Frequency response 30 – 15,000 Hz

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) Aerial terminal External aerial connector Intermediate frequency 10.7 MHz/450 kHz Sensitivity 30 µV

Power amplifier section

Outputs Speaker outputs

(sure seal connectors) Speaker impedance 4 – 8 ohms Maximum power output 50 W × 4 (at 4 ohms)

General

Outputs Audio outputs

Video output

Power aerial relay control

lead

Power amplifier control

lead Input Telephone ATT control

lead

Parking break control lead Tone controls Bass ±9 dB at 100 Hz

Treble ±9 dB at 10 kHz Power requirements 12 V DC car battery

(negative earth) Dimensions Approx. 178 × 50 × 183 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)

Card remote commander RM-X200

Design and specifications are subject to change without notice.

FM/AM MULTI MEDIA PLAYER

9-870-201-12

2001F0400-1

Sony Corporation

e Vehicle Company

Shinagawa Tec Service Manual Production Group

SERVICE NOTES

TABLE OF CONTENTS

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.

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.

1. GENERAL

About Discs .............................................................................3

Location of Controls................................................................ 3

Getting Started......................................................................... 3

CD ........................................................................................... 4

Video CD/Super VCD ............................................................. 5

Radio ....................................................................................... 6

Other Functions .......................................................................6

MP3 File Instruction................................................................ 7

Connections ............................................................................. 9

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 –Tuner Section–....................................... 23

3-3. Block Diagram –CD Section–........................................... 24

3-4. Block Diagram –MPEG Section– .....................................25

3-5. Block Diagram –Display Section–.................................... 26

3-6. Circuit Boards Location ....................................................26

3-7. Printed Wiring Board –CD Mechanism Section– .............28

3-8. Schematic Diagram –CD Mechanism Section (1/3)– .......30

3-9. Schematic Diagram –CD Mechanism Section (2/3)– .......31

3-10. Schematic Diagram –CD Mechanism Section (3/3)– .......32

3-11. Schematic Diagram –Main Section (1/2)– ........................ 33

3-12. Schematic Diagram –Main Section (2/2)– ........................ 34

3-13. Printed Wiring Board –Main Section– .............................. 35

3-14. Schematic Diagram –Relay Section–................................ 36

3-15. Printed Wiring Board –Relay Section– ............................. 37

3-16. Printed Wiring Board –Display Section– .......................... 38

3-17. Schematic Diagram –Display Section–............................. 39

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.

4. EXPLODED VIEWS

4-1. Chassis Section ................................................................. 42

4-2. Front Panel Section ...........................................................43

4-3. CD Mechanism Section (1) ............................................... 44

4-4. CD Mechanism Section (2) ............................................... 45

4-5. CD Mechanism Section (3) ............................................... 46

5. ELECTRICAL PARTS LIST ........................................47

SECTION 1

GENERAL

This section extracted from instruction manual.

456

MP3 FILE INSTRUCTION

CONNECTIONS

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

4 CN701

1 PTT 2.6x

7 heat sink

1 PTT 2.6x8

2 PTT 2.6x8

4 PTT 2.6x8

5 PTT 2.6x8

3 PTT 2.6x12

6 PTT 2.6x8

2-3. MAIN BOARD

5 screws (BTT)

6 MAIN board

4 screws (BTT)

3 PTT 2.6x

2 PTT 2.6x8

1 PTT 2.6x8

2-4. HEAT SINK

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

claws

lever (R)

tension spring (LR)

lever (L)

guide (disc)

special screw

DISC IN SW board

2-7. SERVO BOARD

3 Removal the solders.

6 Special screw

1 CN517

4 P 2x3

5 LO motor sub assy

(M903)

7 Special scre

2 CN518

8 heat sink (CD)

9 SERVO board

2-8. SHAFT ROLLER ASSY

3 retaing ring (RA)

4 shaft retainer

shaft retainer

retaing ring (RA)

washer

arm

washer

arm

shaft retaine

Fig. 1

5 shaft roller assy

2 arm (roller)

1 tension spring (RA)

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

(M902)

2 damper (T)

3 optical pick-up block

SECTION 3

DIAGRAMS

3-1. IC PIN DESCRIPTIONS

• IC513 CXP81960M-659R (CD SYSTEM CONTROL)

Pin No. Pin Name I/O Pin Description

1 A MUTE O Audio mute control output 2 N.C — Not used. (Open) 3 CD ON O CD servo power supply control output 4 RW/R O RF amplifier gain control output (H: CD-RW, L: CD-R/CD-DA) 5 SLD MINUS O Sled motor control output 6 SELF SW I Disc self store switch input 7 E/(U) I Destination setting input (Fixed at H in this set) 8 PH1 I Photo coupler input 1 (Not used in this set)

9 SDA I/O I2C interface data input/output for video encoder IC. 10 SCL O I2C interface clock output to video encoder IC. 11 H WAIT I Wait input from MPEG decoder (Host) IC. 12 H INT I Interruption input from MPEG decoder IC.

13 – 20 HDATA7 – 0 I/O Host data 7 – 0 input for MPEG decoder IC.

21 EMPH O O D/A converter emphasis control output to DSP IC. 22 CD DATA O Data output to CD servo IC. 23 CD XTAL O System latch output to CD servo IC. 24 CD CKO O Clock output to CD servo IC. 25 D SW I Disc switch input 26 N.C — Not used. (Fixed at H in this set) 27 LIMIT SW I Sled limit switch input 28 SUBQ I CD sub-Q serial data input from DSP IC. 29 N.C — Not used. (Open) 30 SQCK O Sub-Q clock output to DSP IC. 31 N.C — Not used. (Open) 32 MSRQ O Serial request output of master microcomputer. 33 N.C — Not used. (Open) 34 CD RST O CD reset output

35, 36 N.C — Not used. (Open)

37 MP I Connect to VSS. 38 RESET I Slave microcomputer hard reset input 39 VSS — Ground 40 XTAL O Crystal oscillation output (12 MHz) 41 EXTAL I Crystal oscillation input (12 MHz) 42 N.C — Not used. (Fixed at H in this set) 43 TEXT IN I Not used. (Connect to SUBQ) 44 N.C — Not used. (Open) 45 TEXT CLK O Not used. (Connect to SQCK) 46 PH2 I Photo coupler input 2 (Not used in this set)

47 – 49 N.C — Not used. (Open)

50 AVSS — Analog ground 51 AVREF — Analog power supply reference input 52 AVDD — Analog power supply pin 53 GFS/MNT2 SEL I GFS/MNT2 select input of DSP IC. (Fixed at H in this set) 54 N.C — Not used. (Fixed at H in this set) 55 FOK I Focus OK input from DSP IC. 56 GFS I Guard frame synchro input from DSP IC.

57, 58 N.C — Not used. (Fixed at L in this set)

59 TEMP H I Not used. (Open) 60 TEMP L I Not used. (Open) 61 LOCK I Lock input from DSP IC. 62 TEST MODE I Not used. (Fixed at H in this set)

Pin No. Pin Name I/O Pin Description

63 SENS I Sensitivity input from DSP IC. 64 IN SW I Disc in switch input

65, 66 N.C — Not used. (Fixed at H in this set)

67 MP3 I MP3 playback control input (H: not playback, L: playback) 68 PH3 I Photo coupler input 3 (Not used in this set) 69 SCLK O Serial clock output to DSP IC. 70 LM LOADING O Loading motor loading (CD tray close) output 71 TV RST O TV encoder IC reset output 72 N.C — Not used. (Open) 73 TE CANCEL O Tracking error offset cancel output of RF amplifier. (Not used in this set) 74 FE CANCEL O Focus error offset cancel output of RF amplifier. (Not used in this set) 75 BU IN I Back-up power supply input 76 SCOR I SCOR input from DSP IC. 77 MSO I Serial input from master microcomputer IC. 78 MSI O Serial output to master microcomputer IC. 79 MSC I Serial clock input from master microcomputer IC. 80 MCS I Chip select input from master microcomputer IC. 81 LM EJECT O Loading motor eject (CD tray open) output 82 DRV OE O Mute control output for driver IC. 83 MD2 O Check output for operation mode. (Not used in this set) 84 TEX I Not used. (Connect to VSS) 85 TX O not used. (Open) 86 VSS — Digital ground 87 VDD — Digital power supply pin 88 N.C — Not used. (Fixed at H in this set) 89 H R/W O Read/Write select output for MPEG decoder IC. (H: Read, L: Write) 90 H RD O Mode select output for MPEG decoder IC at read. (H: Multiflux, L: Individual)

91 – 93 HADDR2 – 0 O Host address 2 – 0 output for MPEG decoder IC.

94 H CS O Host chip select output for MPEG decoder IC. 95 N.C — Not used. (Open) 96 H RST O Host reset output

97 – 99 N.C — Not used. (Open)

100 CDM ON O CD mechanism deck loading motor power supply control output (8 V).

• IC514 CL8830-PE0 (MPEG DECODER)

Pin No. Pin Name I/O Pin Description

1 RESERVED I Fixed at L in this set.

2 – 4 HDATA0 – 2 I/O 8-bit bi-directional host data bus 0 – 2 input/output

5 VDD — Power supply pin (+3.3 V)

6 HDATA3 I/O 8-bit bi-directional host data bus 3 input/output

7 VSS — Ground

8 – 11 HDATA4 – 7 I/O 8-bit bi-directional host data bus 4 – 7 input/output

12 VDD2.5 — Power supply pin (+2.5 V) 13 RESET I Hardware reset input 14 VSS — Ground 15 WAIT O Host wait output 16 INT O Host interrupt output 17 VDD — Power supply pin (+3.3 V) 18 NC O Not used. (Open) 19 VSS — Ground

20 – 26 NC O Not used. (Open)

27 VDD — Power supply pin (+3.3 V) 28 NC O Not used. (Open) 29 VSS — Ground

30 – 35 NC O Not used. (Open)

36 VDD — Power supply pin (+3.3 V) 37 NC O Not used. (Open) 38 VSS — Ground 39 NC O Not used. (Open) 40 VDD2.5 — Power supply pin (+2.5 V) 41 NC O Not used. (Open) 42 VSS — Ground

43 – 46 NC O Not used. (Open)

47 VDD — Power supply pin (+3.3 V) 48 NC O Not used. (Open) 49 VSS — Ground

50, 51 NC O Not used. (Open)

52 RESERVED I Fixed at L in this set.

53, 54 MDATA15, 0 I/O Memory data 15 and 0 input/output

55 VDD — Power supply pin (+3.3 V) 56 MDATA14 I/O Memory data 14 input/output 57 VSS — Ground

58 – 60 MDATA1, 13, 2 I/O Memory data 1, 13 and 2 input/output

61 VDD — Power supply pin (+3.3 V) 62 MDATA12 I/O Memory data 12 input/output 63 VSS — Ground 64 MDATA3 O I/O Memory data 3 input/output 65 VDD2.5 — Power supply pin (+2.5 V) 66 MDATA11 I/O Memory data 11 input/output 67 VSS — Ground 68 MDATA4 I/O Memory data 4 input/output 69 VDD — Power supply pin (+3.3 V) 70 MDATA10 I/O Memory data 10 input/output 71 VSS — Ground

72 – 74 MDATA5, 9, 6 I/O Memory data 5, 9 and 6 input/output

75 VDD — Power supply pin (+3.3 V) 76 MDATA8 I/O Memory data 8 input/output 77 VSS — Ground

Pin No. Pin Name I/O Pin Description

78 MDATA7 I/O Memory data 7 input/output 79 LDQM O SDRAM LDQM output 80 UDQM O SDRAM UDQM output 81 VDD — Power supply pin (+3.3 V) 82 MWE O SDRAM write enable output 83 VSS — Ground 84 SD-CLK O SDRAM system clock output 85 SD-CAS O SDRAM column address output 86 SD-RAS O SDRAM row address output 87 VDD — Power supply pin (+3.3 V) 88 SD-CS1 O SDRAM bank select 1 output (Not used in this set) 89 VSS — Ground 90 SD-CS0 O SDRAM bank select 0 output 91 VDD2.5 — Power supply pin (+2.5 V) 92 NC O Not used. (Open) 93 VSS — Ground 94 NC O Not used. (Open) 95 VDD — Power supply pin (+3.3 V) 96 MADDR9 O Memory address 9 output 97 VSS — Ground

98 – 100 MADDR11, 8, 10 O Memory address 11, 8 and 10 output

101 VDD — Power supply pin (+3.3 V) 102 MADDR7 O Memory address 7 output 103 VSS — Ground

104 – 106 MADDR0, 6, 1 O Memory address 0, 6 and 1 output

107 VDD — Power supply pin (+3.3 V) 108 MADDR5 O Memory address 5 output 109 VSS — Ground

110 – 112 MADDR2, 4, 3 O Memory address 2, 4 and 3 output

113 VDD — Power supply pin (+3.3 V) 114 MADDR12 O Memory address 12 output 115 VSS — Ground 116 MADDR13 O Memory address 13 output 117 VDD2.5 — Power supply pin (+2.5 V) 118 MADDR14 O Memory address 14 output 119 VSS — Ground

120 – 122 MADDR15 – 17 O Memory address 15 – 17 output

123 VDD — Power supply pin (+3.3 V) 124 MADDR18 O Memory address 18 output 125 VSS — Ground

126, 127 MADDR19, 20 O Memory address 19 and 20 output

128 ROM-CS O ROM chip select output 129 RESERVED I Fixed at L in this set. 130 NC O Not used. (Open)

131, 132 GND — Ground

133 RESERVED I Fixed at L in this set. 134 VDD — Power supply pin (+3.3 V) 135 RESERVED I Fixed at L in this set. 136 VSS — Ground

137 – 141 RESERVED I Fixed at L in this set.

142, 143 VDATA0, 1 O Video data bus 0 and 1 output

144 VDD2.5 — Power supply pin (+2.5 V) 145 VDATA2 O Video data bus 2 output

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