XAV-77 - Sony Car Audio Service Manual (repair manual)

E Model

2003D0500-1

C

 2003.04

The XAV-77 is composed of the following models.

Media Center/Receiver

XAV-77

Connection Box

XA-114

Card Remote Commander

RM-X118

Wide LCD color monitor

7 in.

TFT active matrix

336,960 pixels

FM tuning interval: 50 kHz/200kHz

switchable

87.5 - 108.0 MHz (at 50 kHz step)
87.5 - 107.9 MHz (at 200 kHz step)

10.7 MHz

8 dBf

30 - 15,000 Hz

75 dB (400 kHz)

66 dB (stereo)
72 dB (mono)

0.6% (stereo)
0.3% (mono)

35 dB at 1 kHz

AM tuning interval: 9 kHz/10kHz

switchable

530 - 1,602 kHz (at 9 kHz step)
530 - 1,710 kHz (at 10 kHz step)

10.7 MHz/450 kHz

30 µV

Speaker outputs
(sure seal connectors)

4 - 8 ohms

45 W × 4 (into 4 ohms, at 1 kHz)

12 V DC, from car battery (negative

ground)

FM/AM antenna (1)
Power supply (1)
Telephone ATT control lead (1)
Illumination control lead (1)
Remote control input connector (1)

Front audio (1)
Rear audio (1)
Subwoofer (mono)
Power antenna relay control lead (1)
Power amplifier control lead (1)

Dedicated 22-pin connector

Bass ±7.5 dB at 100 Hz
Treble ±7.5 dB at 10 kHz

+8 dB at 100 Hz
+2 dB at 10 kHz

With monitor closed
Approx. 178 × 50 × 185 mm

(W × H × D)

Approx. 1.7 kg

Card remote commander RM-X118

(1) (incl. 1 lithium battery)

Connection box (1)
Parts for installation and

connections (1 set)

Operating Instructions (1 set)

– Continued on next page –

2

...............................................

3

...................................................................

5

3-1. Disassembly Flow ...........................................................

9

3-2. Front Panel Assy .............................................................

9

3-3. Case (Upper) Assy .......................................................... 10
3-4. MAIN Board ................................................................... 11
3-5. Motor Assy (M701) ......................................................... 12
3-6. Setting of Lead from Motor Assy (M701) ..................... 12
3-7. Monitor ............................................................................ 13
3-8. Monitor (F)/(R) Cabinet Assy ......................................... 13
3-9. LCD ................................................................................. 14
3-10. MONITOR Board ........................................................... 14

4-1. Assembly of Flat Cable ................................................... 15

......................... 16

6-1. Block Diagram  – MAIN Section – ................................ 21
6-2. Block Diagram

– DISPLAY/BUS CONTROL Section – ........................ 22

6-3. Block Diagram  – MONITOR Section – ........................ 23
6-4. Block Diagram  – POWER SUPPLY Section – ............. 24
6-5. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 25

6-6. Schematic Diagram  – FM/MAIN (1/5) Boards – ......... 27
6-7. Schematic Diagram  – MAIN Board (2/5) – .................. 28
6-8. Schematic Diagram  – MAIN Board (3/5) – .................. 29
6-9. Schematic Diagram  – MAIN Board (4/5) – .................. 30
6-10. Schematic Diagram  – MAIN Board (5/5) – .................. 31
6-11. Printed Wiring Board

– MAIN Board (Component Side) – .............................. 32

6-12. Printed Wiring Boards

– FM/MAIN (Conductor Side) Boards – ....................... 33

6-13. Printed Wiring Board  – FRONT Board – ...................... 34
6-14. Schematic Diagram  – FRONT Board – ......................... 35
6-15. Printed Wiring Board

– MONITOR Board (Component Side) – ...................... 36

6-16. Printed Wiring Board

– MONITOR Board (Conductor Side) – ........................ 37

6-17. Schematic Diagram  – MONITOR Board (1/3) – .......... 38
6-18. Schematic Diagram  – MONITOR Board (2/3) – .......... 39
6-19. Schematic Diagram  – MONITOR Board (3/3) – .......... 40
6-20. Printed Wiring Boards  – ANGLE/KEY Boards – ......... 42
6-21. Schematic Diagram  – ANGLE/KEY Boards – ............. 43
6-22. Printed Wiring Board  – MOTOR Board – ..................... 44
6-23. Schematic Diagram  – MOTOR Board – ....................... 45
6-24. Printed Wiring Boards  – PULSE/SWITCH Boards – ... 46
6-25. Schematic Diagram – PULSE/SWITCH Boards – ........ 46
6-26. IC Pin Function Description ........................................... 52

7-1. Front Panel Section ......................................................... 61
7-2. Case (Upper) Assy Section ............................................. 62
7-3. Open Close Motor Section .............................................. 63
7-4. Case (Lower) Assy Section ............................................. 64
7-5. Monitor Section ............................................................... 65

............................... 66

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

Video/audio

(Sony bus compatible, 1)

BUS control input connector (1)
Video/audio (2)

Video/audio (1)

Dedicated 22-pin connector

Approx. 136 × 77 × 30 mm

(W × H × D)

Approx. 260 g

Design and specifications are subject to
change without notice.

3

In the state of electric interruption, if a monitor is opened and
closed by force, it will became the cause of failure.
Please open and close a monitor at the time of repair after the
following procedure decomposes and removing a motor.

1) Front Panel Assy (Disassembly page 9)
2) Case (Upper) Assy (Disassembly page 10)
3) Motor Assy (Monitor Open/Close) (M701)

Follow the disassembly procedure in the numerical order given.

1

five screws (M2 

×

 2.3)

3

three screws (M2 

×

 2.3)

6

Open and close a monitor after lifting 
a motor assy (monitor open/close) (M701).

motor assy (monitor open/close) (M701)

3

screw (M2 

×

 2.3)

2

cover

4

lug

5

4

When repairing this set, etc., connect the extension cable as the figure shown below.

extension cable
(LCD unit – monitor board)
(Part No. J-2502-051-1)

extension cable
(main board – monitor board)
(Part No. J-2502-056-3)

extension cable
(monitor board – monitor ground plate)
(Part No. J-2502-056-4)

extension cable
(7 inch monitor back light – monitor board)
(Part No. J-2502-051-3)

connect the earth