Road Rover I10 Platform Manuale utente

Service Manual for VW

Hardware

I10 Platform Preview

Structure and Design ……………………………………………………………………………………… 01

Connecters and Pin Diagram ………………………………………………………………………………….…02

Cables ………………………………………………………………………………………………………………….…02

System Configuration………………………………………………………………………………………………..03

Function and Features……………………………………………………………………………………………….04

Fundamental Performance and Parameter………………………………………………………………...05

……….

Main Board

Chips and Circuit Analysis

U13（LM3S1793）Microcontroller（MCU）…………………………………… 06

1.Power supply circuit for MCU……………………………………………………………………………….…06

2.B+3.3V power supply for MCU……………………………………………………………………………..…07

3.MCU clock circuit………………………………………………………………………………………………....…07

4.MCU reset circuit………………………………………………………………………………………………....…07

5.ACC detection circuit………………………………………………………………………………………………08

6.MCU Situation Analysis after Working Properly…………………………………………………..…08

7.System main power supply………………………………………………………………………………………09

8..Data bus works properly…………………………………………………………………………………………12

9.U16 Digital audio processing chip…………………………………………………………………………13

……………………………………………………………………………………….…05

……………………….…

10.U25 Central/Bass Operational Amplifier………………………………… 22

11.U24 CCD Switch Chip……………………………………………………………………………………………23

12.DVD Power Supply………………………………………………………………………………………………...25

13. Hand Brake Circuit Analysis………………………………………………………………………………….27

14. Remote Control Circuit Analysis……………………………………………………………………………27

15. SWC(Steering Wheel Control) Circuit……………………………………………………………………28

16. USB/iPod Power Supply Circuit…………………………………………………………………………….28

17. ILL (Illumination) Circuit……………………………………………………………………………………….29

……………………………

Contents

Navigation Board

1.Main power supply circuits on navigation board………………………………… 31

2.Main chips on navigation board…………………………………………………………………………………33

1. U8 CPU………………………………………………………………………………………………………………………33

2.U12、U13、U31、U32 DDR RAM（256M）………………………………………………………………...34

3.Flash (256M) ………………………………………………………………………………………………………………34

4.U29 (Expanded Memory) ……………………………………………………………………………………………35

5.U14 TW8816-Display Driver Chip………………………………………………………………………………35

6.Display Screen……………………………………………………………………………………………………………37

7.Touch screen……………………………………………………………………………………………………….………39

8.USB………………………………………………………………………………………………………………………..……40

9.SD Card………………………………………………………………………………………………………………….……41

10.Bluetooth …………………………………………………………………………………………………………………41

11.U27 Bluetooth Audio Amplifier ………………………………………………………………………….……43

12.Bluetooth Audio Switching Chip…………………………………………………………………………….…43

13.U20 Audio Decode Processing Chip…………………………………………………………………….……43

14.U22 GPS Module………………………………………………………………………………………………………45

…………………..…

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Troubleshooting Guide

Troubleshooting Methods and Steps

General regulation………………………………………………………………………………………………………………46

General troubleshooting methods………………………………………………………………………………………46

Common failure and solutions ……………………………………………………………………………………………47

1.Cannot power on (black screen) ………………………………………………………………………………………47

2.All functions have no sound……………………………………………………………………………………………..50

3.Radio doesn't work & no sound………………………………………………………………………………………..51

4.DVD Failure (blue screen/no sound/no image/no color) …………………………………………………52

5.TV/AUX/iPod no sound…………………………………………………………………………………………………….54

6.Displaying problem………………………………………………………………………………………………………….55

7.Reverse problem……………………………………………………………………………………………………………...55

8.Handbrake doesn't work…………………………………………………………………………………………………..56

9.iPod cannot work properly………………………………………………………………………………………………..57

10.Cannot recognize USB device…………………………………………………………………………………………58

11.Remote control doesn't work…………………………………………………………………………………………58

12.SWC doesn't work…………………………………………………………………………………………………………..59

13.White screen/ blurred screen …………………………………………………………………………………………59

14.Bluetooth cannot be connected/ cannot search any Bluetooth device…………………………..63

15.The receiver cannot hear any sounds or noises exist when call somebody via Bluetooth 64

16.Hear nothing when you play Bluetooth music (A2DP) or call somebody via Bluetooth….64

17.No sound when you play MP3/MP4 or in navigation mode…………………………………………….65

18.GPS cannot get the position……………………………………………………………………………………………66

19.Screen Color Bias…………………………………………………………………………………………………………….67

20.Touch screen doesn't work ……………………………………………………………………………………………..69

21.Button lights cannot work……………………………………………………………………………………………...69

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i10 PLATFORM

HARDWARE

Basic Information

All the units based on I10 platform adopt a brand new structure engineering design,

which makes the products have a better look, a better performance.

Side View

Structure & Design

Front Panel

DVD PART

Main Part

Front Panel: Navigation Board，LED Screen，Touch Screen，Plastic Frame And

Holding Covers included.

DVD Part: DVD Loader and holding covers included.

Main Part: Main board and holding covers included.

Front View

HARDWARE

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i10 PLATFORMi10 PLATFORM

HARDWARE

Connecters & PIN Diagram

Cables

1. Rear camera cable----input the video

of rear camera; input a reverse trigger;

provide power for rear camera.

GND

+12V

Reverse

CCD-IN

2. iPOD cable-----connectivity to IPOD，IPAD，IPHONE, play and control music

from I10 unit.

3. USB cable-----use for USB devices.

4. Front camera cable----- input the video of rear camera; provide power for rear

camera.(This function can be enabled by a special software if needed)

GND

+12V

Video-IN

5. Subwoofer pre-out cable---Pre-outs for subwoofer

and center signal; provide a trigger for external

amplifier. This cable is special for car audio tuning

to realize a real 5.1 channel sound effect.

Amp Control

Center out

Sub-woofer

6. Microphone cable-----audio input for Bluetooth.

7. TV input cable-----audio and video input from other

sources, mainly used for external TV audio and video

input.

R-IN

L-IN

Video IN

8. Video output cable-----mainly used for headrest

monitor, provide video from DVD，AV-IN，

（Internal TV—developing），（ipod，ipad，

iPhone Video—developing）.

R-OUT

L-OUT

Video OUT

9. Surround pre-outs（4 SP）----Used when the

user wants to connect external 5.1 amplifier. RR OUT

RL OUT

FR OUT

FL OUT

10. GPS cable----receive signals from satellite to fix the position.

System Configuration

1. CPU: 600MHz ARM11+300MHz DSP

2. DDR1: 128M\256M

3. FLASH: 256M\128M

4. INAND: 4G---32G

5. RADIO: NXP Ultra low intermediate frequency digital radio modem

6. AUDIO DSP: NXP 135MHz float DSP

7. MCU: TI 32bit microcontroller\bus transceiver

8.Amplifier: ST7801 digital input, integrated HIFI (high fidelity) DAC

（digital-to-analog converter）, adopt MOSFET as the power output

HARDWARE

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i10 PLATFORMi10 PLATFORM

HARDWARE

Functions and Features

1. Standard power interface, no damage to plug with the original car

2. Support dual antenna interface, transfer-free

3. Adopt Germany FAKARA standard radio connector, enhance the sensitivity and

stability for the GPS reception.

4. Support front\rear camera(options)

5. Support dual USB 2.0& USB 1.1

6. Support external microphone

7. Support two AV outputs

8. Support CMMB\DVB-T\ISDB-T digital TV and analog TV

9. Connect and charge iPhone \ iPod \iTouch

10. Support Surround pre-out

11. Support central and subwoofer output

12. Support AUX input

13. Support 3D real view navigation

14. Support multi navigation software

15. Support DVD\CD\CD-R\CD-RW format and MP4,WMA,WAV and so on.

16. Radio (support RDS, including AF,TP,TA,PTY function)

17. Bluetooth (support phonebook function)

18. Support IPOD,IPHONE operation from the touch screen

19. Support file explorer

20. Support multi language and theme, the background theme can be customized.

21. Air-conditioner information display synchronization

22. Multi time zone selection, support 12\24hour mode

23. backlight adjustable，day/night mode

24. support original parking sensor and rear image display, easy to switch from

parking sensor image to rear view image

25. Dynamic spectrum display

26. 9 bands EQ free choice， 5 DSP sound effect selection

27. Unique spatializer, provide 5 sound field position selection

28. Sound pressure contour control

29. Button beep sound

30. 5.1 channel Real mode output, output voltage is 4Vrms（volts root mean square）

maximum output 8V

31. Dynamic treble\bass control, central frequency and gain adjustable

32. Bass output, provide 10 cut off frequency points, gain(6DB) adjustable, phase

(0-180) adjustable

33. Central output, provide 7 alternative cut off frequency points, gain(6DB)

adjustable

34. Indirect touch technical for CD，realize track selection directly

Fundamental Performance and Parameter

a. CD (internal amplifier output, standard output)

SNR: ≧92B

DYNAMIC: ≧90Db

DISTORTION THD+N: 0.05％

b. Radio (internal amplifier output, standard output)

SNR: ≧75Db

Sensitivity S\N 30DB: -3 dBuv

c. MP3(internal amplifier output, standard output)

SNR: ≧80db

DYNAMIC: ≧75db

DISTORTION THD+N: 0.05％

Main Board

Radio antenna socket

Function Socket Power & Speakers Socket

Cn8 DVD Connecting Port

Q1 P-Channel

Enhancement Mode

MOSFET

U19 Digital input quad

power amplifier

U11 Synchronous

Rectified step-down

converter

U25 operational amplifier

for Ex. Bass &central

U17 operational amplifier

for Ex. Amp

U6 Low Dropout Voltage

Regulator with Shut Down

Switch

Q22 DSP1.8V Supplier

CN6 Front Panel Connecting Socket

U14 Erasable

Programmable

ROM（EPROM）

U13 Microcontroller（MCU）

U20 CANBUS Transceiver

U16 DSP

Processor IC

Front/Rear Video IC

U26 A/V Switcher

CN9 Built-in TV Socket

USB.IPOD Power Supply IC

Digital Radio Module

Chips and Their Functions on Main Board

HARDWARE

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i10 PLATFORMi10 PLATFORM

HARDWARE

1. U13（LM3S1793）Microcontroller（MCU）

1. Function: Control the power supply and all the functions for the whole system.

2. Normal Operating Conditions:

2.1 Power supply circuit

2.2 Crystal oscillator oscillation circuit

2.3 Reset circuit

2.4 ACC detection circuit

2.5 Correct Software

Operating Conditions Analysis for MCU

2.1 Power supply circuit for MCU

The main power supply circuit for MCU can be divided into two parts.

a. MCU need a 3.3V Power supply（MCU_+3.3V）.

The BATT+12V goes to U6, then U6 offers a 5V voltage at pin 4 to U1, U1 provides

the 3.3V at pin 5 to MCU. As shown below.

B+12v input to U6 5V

MCU3.3V

b. B+3.3V for MCU（MCU BATT_+3.3V）.

The Batt+12V goes to the pin 3 of U8, and U8 offers a 5V voltage to U2, then U2

output the B+3.3V to MCU. As shown below.

B+12V

MCU B+3.3V

2.2 MCU clock circuit

There are two oscillation circuits for MCU, two crystal oscillators are included,

one is 16 MHz and the other is 4.194304 MHz.

2.3 MCU reset circuit

U15 is a reset chip for MCU, it works when you press the reset button and pin 2

becomes low level. It doesn't work if the power at pin 2 is a high level.

HARDWARE

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i10 PLATFORMi10 PLATFORM

HARDWARE

3.3V

U15 Reset IC

2.4 ACC detection circuit

ACC_CO input a 12V to the voltage-regulator diode Z1, after Z1 and R121, the

voltage at the base of Q18 will be 0.58V, then collector and emitter will be short

circuit. Then the voltage of POT_ACC will be changed from high level to 0V (low

level) and it will be activated.

Effective when low level detected

Q18 Base 0.58V

External ACC 12V

Z1 andQ18

MCU Situation Analysis after Working Properly

1. When MCU is working, it will send a 3.3V high level signal (SYS-POWER) to pin 7

of U11, that makes U11 start work and provide a 5V for front panel.

SYS_POWER 3.3V from MCU high level

Front panel power supply T_5V

U11 Synchronous Rectified

step-down converter

2. System main power supply

The system main power supply is composed of T_5V、12V、9V、+5V、+7.5V、-7.5V、

+5V、VCC 5V

a. System power supply T_5V

T5V is the power supply for front panel, CCD circuit, AV switching chip(U26),

Q1 stabilizing circuit, DSP voltage-stabilizing circuit, fan power supply circuit,

and USB/ iPod circuit.

SYS_POWER 3.3V from MCU high level

T_5V power supply

b. System power supply 12V

The 12V generated by Q1, it will offer power for TV module, CCD, radio antenna,

external amplifier, and the system 9V circuit.

When T_5V offered，

the base and emitter

of Q5 become short

circuit，Q1 starts

working and provide

a 12V voltage

12V

Power supply

for radio antenna

HARDWARE

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i10 PLATFORMi10 PLATFORM

HARDWARE

c. System power supply circuit M_+9V

After the MOSFET Q1, there is a 12V offered to U4, then U4 will give a 9V to radio

and DVD part as a driver power supply.

12V from Q1 9V for radio and

DVD circuit part

d. System power supply TV_TUN_12V

The 12V voltage comes from Q1 goes to PT3 and D3, then a stable 12V is available

for external TV box.

12V from Q1

TV 12V for

external TV

box

e. System power supply CCD_VCC(10V)

U35 get a stable voltage 12V from Q1, then it provides a stable voltage around

10V as the power supply for rear camera.

12V from Q1 6.5V for

rear camera

12V from Q1 12V for

rear camera

f. Radio power supply RADIO_+5V

When U30 get a normal 9V at 1st and 2nd pin, it will provide a stable 5V for radio

at 4th pin.

9V from 4th pin of U4 +5V for radio

g. Positive power supply for operational amplifier +7.5V

When the 9V go through a current-limiting resistances, it will be changed to 7.5V

as a power supply for the operational amplifiers (U17&U25).

9V from U4

+7.5V for operational

amplifiers (U17&U25)

h. Negative power supply for operational amplifier -7.5V

When 5V AC signal go through D15, it will be changed to negative voltage -5V,

then the diode will double the voltage to -10V, after a current-limiting resistance,

it will be reduced to -7.5V as a power supply for operational amplifiers (U17&U25).

A 5V AC signal from U11

Compound diode voltage-doubling circuit -7.5V for operational amplifiers (U17&U25)

HARDWARE

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i10 PLATFORMi10 PLATFORM

HARDWARE

i. System power supply CAN_VCC(5V)

U8 gets the normal B+12V at 3rd pin, it will provide a 5V voltage for CANBUS

transceiver, remote control receiver. So when the ACC of the vehicle is ON,

we can use the remote control to power on the unit.

BATT_+12V

5V for CANBUS transceiver

and remote control receiver

3. Data bus work properly

Date bus is the serial data bus which provides a way to sending and receiving

data or signals for MCU. MCU communicates with EPROM (U14) via data bus to

memorize the system working status, such as the system volume, OSD adjusting

info, power-on/off mode etc. The data bus connects with different parts and

controls different functions. For example, DSP(U16), AMP, TW8816, and AV

switching chip(U26).

Erasable programmable Rom

Data Bus 3.3V

MCU CANBUS Port

A short Summar y for MCU

Here is a short summary and some extra information for MCU.

a. The MCU_+3.3V goes to MCU and a lot of other circuits. Such as steering wheel

control circuit, data bus circuit, reset circuit, AUX detecting circuit, handbrake

circuit etc.

th th th

b. The BATT_+3.3V goes into MCU via pin 50 ,51 ,55 .

th th

c. The crystal oscillator XT1is connected to 48 and 49 pin of the MCU, and the

th th

XT2 is connected to 52 and 53 .

d. POT_ACC is connected to 46th pin of the MCU.

e. MCU block diagram.

Digital radio

module DSP

MCU

EPROM

AMP

AV switcher

Video

processor

TW8816

AV/TV/

IPod/

AUX

Chips and Functions on Main Board

2. U16（NXP SAF7741）digital audio processing chip.

1. Function: DSP digital audio processing and digital radio tuning

2. Normal operating condition:

2.1 Correct power supply

2.2 MCU data bus working properly

2.3 DSP reset

2.4 oscillating circuit working properly

HARDWARE

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i10 PLATFORMi10 PLATFORM

HARDWARE

2.1 DSP power supply circuit

The main power supply circuit for DSP audio processing chip can be divided

to 2 parts:

a. DSP power supply1 ( ) DSP_+3.3V

When U10 gets T_ 5V voltage at 3rd pin, it will offer a stable 3.3V to DSP.

5V from U11

3.3V goes to Q22

b. DSP power supply1 ( )DSP_+1.8V

When DSP_+ 3.3V is correct, Q22 can start work and provide a stable 1.8V to

DSP3.3V comes from U10DSP.

DSP3.3V comes from U10

DSP1.8V

power supply

2.2 DSP serial data bus

DSP serial data bus is controlled by MCU, all the functions share the same way to

communicate with MCU.

3.3V

DSP CANBUS Port

MCU CANBUS Port

2.3 DSP reset

The DSP reset is controlled by MCU, there is a 3.3V voltage at reset pin of the MCU,

when you press the reset button, the voltage there will be changed to low level,

then the MCU reset. Then DSP chip will follow the step and reset.

Low level reset

3.3V from pin 75 of MCU

2.4 Clock oscillating circuit

This is a clock oscillating circuit, and the oscillator frequency is 41.6MHz.

A short Summar y for DSP

Here below is a detailed signal flow instruction for DSP audio processor.

a. PC Audio Processing

PC analog audio signal, which comes from audio processor（）on

th th

navigation board, goes to 11 and 14 pin of DSP chip as Audio_R channel

th th

and Audio_L channel, 12 and 13 pin of DSP chip are Audio_GND. There are

4 different PC audio signals, included.

WM8758

MP3, MP4, GPS, Bluetooth

b. DVD Audio Processing

th th

The DVD goes to 24 and 25 pin of the DSP chip.digital audio signal

c. Digital Radio Audio Processing

The digital audio signal of the radio will go directly to the DSP chip.

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