This post was last edited by littleshrimp on 2022-5-25 17:03
This time we are going to dismantle the display screens of two Audi cars. One is a 5.8-inch display screen produced by Alpine that was eliminated from the Q3 car. I forgot to take photos of this screen before dismantling it, so I used the pictures of the seller on a certain fish website. This screen is a little more expensive, and the scratched one (without film) costs 29 yuan per piece.
The other is the 6.5-inch display used on A4L Q5 A5, produced by Panasonic. It is simpler than the Q3 and cheaper. The one with all scratches costs 14.9 yuan, which is basically a bargain.
The components of the A4L after disassembly are as follows: a back cover, a front panel frame, a PCB, a display screen and several screws.
What’s interesting about this screen is that the backlight is bonded to the back panel, the LCD screen and backlight are separated, and it has no touch function.
The components on the circuit board are mainly concentrated on the front, using the square connector in the lower left corner. The power, control and image signals are all here.
The chip used is Maxim (acquired by ADI) deserialization chip + NXP single-chip solution, and the power chip is of the Onsemi brand.
The circuit core of this screen module is a MAX9218 from Maxim Integrated (now acquired by ADI): a 27-bit, 3MHz to 35MHz, DC-balanced, LVDS deserializer chip.
Its function is to decode a LVDS serial signal into 27-bit parallel data to drive the LCD.
MAX9218.pdf
(761.65 KB, downloads: 18)
It also contains an NXP P89LPC933H microcontroller, which is used to implement some control logic.
P89LPC933_934_935_936.pdf
(537.78 KB, downloads: 9)
The backlight driver uses TI's LM3431 3-channel constant current LED driver with integrated boost controller.
lm3431.pdf
(1.94 MB, downloads: 9)
The chip with 33072 printed on the left is Onsemi's MC33072 dual-channel amplifier
33072MC34071-D.PDF
(469.54 KB, downloads: 10)
.
ALPHA & OMEGA's AO4850 dual N-channel enhancement mode field effect transistor.
AO4850.pdf
(112.88 KB, downloads: 10)
NSS60601MZ4 low VCE(sat) transistor from ONSEMI, NPN, 60 V, 6.0 A.
NSS60601MZ4-D.PDF
(197.1 KB, downloads: 10)
CD74HC125 Quad Buffer with Three-State Outputs.
cd74hc125.pdf
(1.57 MB, downloads: 11)
FDS4935A dual channel, P-channel MOSFET.
FDS4935A-D.PDF
(244.29 KB, downloads: 14)
NCV4276A is a 400 mA LDO from Onsemi.
NCV4276-D.PDF
(310.87 KB, downloads: 9)
Below is a photo of its backlight LCD main cable
Use the 10-pin connector below
The Q3's screen looks a bit more upscale, with a plastic panel and touch function.
The display uses AUO's C065GVN01.
The circuit looks relatively new, and the key chips are coated with a blue substance that looks like conformal paint, which can be scraped off with a blade, like a thin film.
This screen uses TI deserialization chip + Renesas MCU solution, and image transmission uses TI's DS90UR916Q 5 - 65 MHz 24-bit color FPD-Link II deserializer with image enhancement function chip.
ds90ur916q-q1.pdf
(1.11 MB, downloads: 12)
The microcontroller is Renesas's R5F3640, and only Japanese information was found.
There are two Linear Technology power chips on the board. The one with LTYZ printed on it is the Linear Technology (acquired by ADI) LT1946 1.2MHz step-up DC/DC converter with 1.5A switch and soft start function.
LTYZ 1946fb.pdf
(539.08 KB, downloads: 13)
Another product with LCHB on the screen is the LT3505 from Linear Technology (acquired by ADI), a 1.2A step-down switching regulator in a 3mm × 3mm DFN package.
lchb 3505fc.pdf
(812.42 KB, downloads: 10)
TPC8046 is Toshiba's field effect transistor silicon P/N-Channel MOS type (P-Channel/N-Channel ultra-high-speed U-MOSIII)
TPC8406-H.pdf
(288.77 KB, downloads: 9)
Maxim (acquired by ADI) MAX16814 integrated, 4-channel, high-brightness LED driver with high-voltage DC-DC controller.
MAX9218.pdf
(761.65 KB, downloads: 18)
ROHM's BD3570 single output LDO regulator high voltage LDO regulator.
bd357xyxxx-m-e.pdf
(1010.46 KB, downloads: 11)
ROHM's BDxxKA5 series 500mA variable/fixed output LDO regulator.
00ka5 C161948_15198941558651383399.pdf
(689.36 KB, downloads: 10)
A device with a rather strange appearance that looks like a voltage regulator. It looks very professional, but I couldn't find any corresponding information through ALAO.
ATA6662C LIN transceiver from ATMEL (acquired by Microchip).
Atmel-4916-LIN-Networking-ATA6662C_Datasheet.pdf
(541.08 KB, downloads: 11)
The silkscreen T08 is a dual 2-input AND gate that looks like 74HC2G08.
T08 74HC_HCT2G08.pdf
(206.76 KB, downloads: 10)
What remains are some small components that no information was found for, and some detailed pictures of interfaces.
[attach] ]608529[/attach]
The car machine I disassembled last time ( a Toyota car machine disassembly suitable for DIY modification) has the display screen and media control part integrated together. The screens of these two Audi models are separated from the media control. This separate structure is more convenient to upgrade. If you think the screen is too small, you only need to replace it with a larger screen, which is relatively inexpensive. This may be the reason why many people will directly replace these two screens with larger sizes at 4S stores after buying a new car.
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