GS300 Android及電壓表安裝

1. Android係統

https://source.android.com/devices/automotive? 

1.1 主機

選用9"屏幕約228-218x130mm，原廠收音機為230-213x126。我的05 GS300不帶MK功放無Navi，原廠radio是前置差分LR輸出，功放在乘客側抽屜後麵或CD盒右側，原廠這三件均不可再用，因為收音機拆掉後沒了數控。

係統1：https://www.youtube.com/watch?v=iDaZsiMKRh8#t=1m14s?  1：https://www.youtube.com/watch?v=z2XqwfbqbIE 客服 [e-mail]，120刀帶後視頭，1G/16G。無woofer但可用L/R out線路RCA輸出。

係統2：https://www.amazon.com/ZHNN-Touchscreen-Multimedia-Navigation-Bluetooth/dp/B08M5ZP6BH/ 該機類似，但是RAM加倍，可設置倒車時音頻不間斷(沒找到)，多了sub woofer輸出但不隨音量控製變。該機有Android 9.1和10.1兩版，Amazon寄給我的是9.1，顯示mph，實測ant/amp ctrl無輸出，EQ有sub woofer截至頻率及4頻電平可調，斷電保留但是收音機音量似乎未保留？廠家寄的是10.1，顯示kmh，ant/amp ctrl有輸出，EQ無sub woofer截至頻率但有5頻電平可調，斷電保留但是收音機音量似乎未保留？音量控製均不改變兩版的sub woofer輸出。GPS帶iGo，10.1並帶Here，均可下載Google map及各類Android app。口令8888。review：https://www.youtube.com/watch?v=fw_JtKWTe3c 安裝：https://www.youtube.com/watch?v=dg4Ji1G0w4E  另購攝像頭可用空管穿線型但隻能偏置 https://www.ebay.com/itm/384340919673?hash=item597c810579  客服https://www.facebook.com/ZHNNOfficial/ 

Please follow this link to download the T3 UI, it might update Android 9 to 10 : https://drive.google.com/file/d/1egdoWppILPQDI4FhwwlsKvmqoiNLCN-Z/view?usp=sharing Download this file update.zip to your FAT32 USB flash drive. Follow this video to help update: https://youtu.be/5Ll0F1zNK8Q passcode：16176699

其它：強烈建議在play sore下載Agama app作為主頁，付費2美刀，support@alter cars.ru。這個沒試過：https://apkpure.com/agama-car-launcher/altergames.carlauncher 其它：如果藍牙斷開：1.在手機設置中打開藍牙，搜索藍牙，找到並連接CAR-BT(OR CAR-KIT)，2. 通過單擊前麵板上的 RST 孔來重置。如果藍牙沒有聲音而是調頻收音機的聲音，聯係facebook的ZHNN或[e-mail]。實踐表明天線剪短到1/4波長也無改善。

汽車功放內均有大電感濾波但無升壓。該機用厚膜4CH功放TDA7388(好點的TDA7850)有10A熔絲，最大輸出近90W。4CH輸出需要避開原廠功放直接接喇叭；另需woofer amp，其輸入可為L/R out或Sub woofer的RCA頭但似乎音量不可調，建議Hi level由喇叭端引。

安裝前先取出光碟、磁帶，再關車並卸掉電池負極線。

1.2 主機安裝: 先左後右撬開上部出風口，撬開排檔左上小帽用鑰匙頂一下即可換擋，打到最低檔以便取出下部煙灰盒，上下4x10mm螺栓(及下麵螺絲內側的clip)即可取下空調及收音機組件。視頻2的安裝把新架掰折是不需要的：https://www.youtube.com/watch?v=Kkee3Yov4W0#t=8m30s，舊件先由上下外沿劃線可知出分口下沿突出約4mm，換裝收音機後按此線調，標記舊架鑽孔位置把新舊架結合。兩側稍擠即可裝入，下端可與皮麵平行或稍往裏，煙灰缸上沿似乎需要鋸掉3/16"。兩USB可放入乘客側抽屜內；或在卸掉木紋板後用flash mount USB座裝在適當位置。若需掰開木紋板見視頻0的1m41s。 主機裝回時記得出風口/點煙器接線和收音機/GPS天線。

原廠收音機後麵的20芯頭主要的線是：Blu/Yel 1=+B(Dome Fuse 10A)接新機黃，Gry 11=ACC接新機紅，WHT/BLK 20=GND(推薦原廠功放處S12.9)接新機黑。視頻單紅線接新機Back/Reverse，另一頭紅線接後備箱倒車燈+12V。兩藍線為Ant/Amp ctrl控製天線和功放，實測無輸出。原廠無ILL線因此新機橙(用於開大燈時的控製板亮度)不接。新機若有Light grn線是Parking light需接地，不然屏幕不亮。

新機4CH功率輸出，另加41"長線去原廠amp一側，通過70-1761轉接公頭接原來給原廠功放的6/10芯母頭。

點煙盒的裝回：由於新機比原來的高了2-3mm，點煙盒的上部需用台鋸切除，保留白鐵支架，這一步考驗功力。四個塑料銷上端按斜角切除，因為插入時角度有所變化。

1.3 原廠功放：實測除RL/RR喇叭為4歐其餘2歐。乘客側抽屜後麵，需要棄之不用，因其由收音機數字控製。按視頻1掰下右側抽屜底板，卸掉2x10mm螺栓及上部3x螺絲，放下前板後可見黃色氣囊接頭及右側功放，氣囊接頭不要斷開但可由前板脫下；或在此前脫開接氣囊接頭的小板。取下抽屜燈線。卸掉3x10mm可取出CD盒。功放上黑12芯、中橙8芯、下白6/10芯插頭，左上腳1，然後先數左列。以下為原廠色線及用70-1761轉接公頭改後的(顏色)：S12: 1/6=RP/RM,2/7=LP/LM,3/8=SGND/AVGND,4=MUTE,5=NC,9/10=BUSP/BUSM,11=B02,12=ACC. S8: CD. S6: 1/3=SRRP/SRRM=紅/白,2/6=SRLP/SRLM=黑/黃,4/5=WFP/WFM=綠黑/綠紅(灰黑). S10: 1/5=SFRP/SFRM=綠/藍,2/6=SFLP/SFLM=粉(橙白)/紫,3=nc,4=BU=+12V20A藍黃(紫黑),7=GND白黑,8=TLMT(telephone mute)藍粉(未接),9=GND未接,10=NMUT(navigation mute)未接。

1.4 Sub woofer功放

原廠超低音喇叭阻抗標在喇叭罩上，我的是81789-30040 2歐，由功放內TA8225H驅動，輸出約40W。由於新機隻有Sub woofer線路輸出(L/R或Sub woofer的RCA)且無音量調節故不可用，需另加功放並由L/R的喇叭端經衰減接入，即High Level接法。若所用sub woofer功放增益為Kv，應衰減Kv-6db；若無低通也需加上。

1.4.1 TPA3116/8功放板

TPA3116/3118輸出功率與原廠功放類似。方案1是市售TPA3118板 https://www.amazon.com/dp/B07SGK3VFS，其增益36db。主機L/R out RCA各接20K電阻後，另一端並起做為輸入，對地0u33作為100Hz低通，裝在主機後麵。TPA的腳3=SDZ要接PWR ctrl或ACC。方案2 https://www.ebay.com/itm/393401370248 自帶低通。

1.4.2 原廠先鋒功放改裝

此時需70-1761 6/10芯公母頭一對，公頭接原來給原廠amp線的母頭，母頭接原廠amp上的公座，如此將新機、舊線 、舊amp聯係在一起，包括給舊amp的+12V/ACC/GND舊amp subwoofer的輸入輸出、新機4CH輸出。

。原廠功放去數字板，按下述改造後裝回，S12線插回
。71-1761轉接線頭公母各一對，即S10/S6公母各一對
。母頭接原廠功放但不包括4CH喇叭線，公頭接原廠線的母頭
。6芯線包括新機的2後座喇叭線和舊amp的sub woofer喇叭線
。10芯線包括新機的2前座喇叭線、原機線+12V、電源地
。RL+/RR+利用原12芯線，板上衰減31-34db (16K-470//3u3)後接CN905.3作超低音輸入，低通為100Hz
。板上ACC(S12.12)跨接68K電阻到TA8225H腳1，割斷其它部分

2階低通：1）2x1K6/1u--15K-470//3u3，2）第二節改47K+5Kpot，pot//0.47，最大低音提升16db。

1.4.3 更大的功率？

要更大的功率建議400W DC-DC升壓：https://www.youtube.com/watch?v=xSI9k5BK-jU，150W DC-DC或許也夠。為了關斷DC-DC的TL494和TPA3116/8，主機PWR CTL線要接TPA311的腳3=SDZ，並通過47K接一PNP管B極，後者C/E分別接TL494的腳4=DT和14=Vref。

商品可直接使用PA-60: https://www.amazon.com/gp/product/B08MYQNK7H，該功放在14.4V 4歐下的功率約142W(1%THD 108W)，2歐下稍高但易保護關斷。模擬功放效率低且易燒毀，原因包括負反饋不足或喇叭線長導致自激、工作點電位器氧化導致靜態電流大、管子耐壓或電流不足，正負電源相差過大。該功放應該有升壓電路，其可靠性不詳。Boss R1100更好 https://www.youtube.com/watch?v=aIWaoLUaDSU，2歐下175/198W(1%/10% THD)。另R1002是2CH使用TDA7377橋接，輸出約30W，沒有升壓但有電源濾波。

功放的修理，多半是量功率管有否短路。

https://www.clublexus.com/forums/gs-2nd-gen-1998-2005/674473-trying-to-install-aftermarket-stereo-help-2.html 

1.4.4 天線

最常用的天線是1/4或1/2波長，前者其實是用地平麵作為另一半。1/2波長是構成駐波的最短長度。如果短於1/4波長便呈容性，需要加感實現諧振。https://bbs.huaweicloud.com/blogs/233812 

本機wifi和bluetooth都是2.4G，CH6頻率2.437G波長L=300/2.437=123.1mm，1/4或3/4波長分別為30.8和92.3mm；而原帶電線長63mm估計由PCB算更長些。DIY：https://www.youtube.com/watch?v=bs8hvXGJdhM此1/2波長dipole天線可用電視同軸電纜，僅下端25mm留屏蔽層，然後是25mm直線，70mm長加感，60mm長直線。其它DIYhttps://zhidao.baidu.com/question/333363623135893165.html

進system可以看見Bulid number，點擊直至出現“No need, you are already a developer”，按回退鍵，將顯示，點擊進入後可選Aggresive wifi選項或打開自動更新。

原機收音機有直徑9.5(AM/FM主天線Motorola插頭)和6.35(FM)兩個插頭，後玻窗的可能是小插頭且隻支持FM。原廠20芯座腳4(BLK/WHT)/13(WHT/RED)/14(WHT/BLU)分別是ANTA/ANT/ANTB。買適配器後似乎小天線2效果好，1+2未試。市售簡單T型未考慮阻抗變換，也許用電視的spliter會好些但有衰減。汽車收音機在80年代中期開始使用雙天線以改善建築物反射造成的FM多徑噪音，工作時自動采樣切換，非原廠產品均不支持。https://www.installer.com/tech/index.php?page=diversity 

1.5 倒車攝像頭：需要裝在後備箱蓋上，由前乘客側貼地走到後排座椅後，去左側後與原廠燈線一起走(右側沒有線槽)。前乘客側底板為兩螺絲和容易脫口的銷子，貼底線塞進底蓋，但是要拆後排座墊和背靠後備箱內襯。卸掉後座椅：https://www.youtube.com/watch?v=ph2Oh3djcWI  小結：人進車內雙手各執座椅兩側往上扳，卸掉座椅；每側下端卸掉兩個U環上的螺栓及枕頭下被蓋住的螺栓，卸掉椅背。掀開後備箱內襯可見孔洞用於穿線。

卸掉後備箱上襯：https://www.youtube.com/watch?v=u9tdPrsGlmE&t=56s，即去除所有塑料卡銷，右側黑盒的兩螺絲，左側手柄蓋四邊中間是卡銷呈口字型，要由左右兩側把它往外翹。去襯板後可見兩牌照燈部件，鬆開後者4x10mm螺栓和兩銷子可把鑰匙鎖蓋或裝飾件(Exterior trunk trim or garnish)拿下，以便其水平麵上裝攝像頭。攝像頭裝在正中，但線要在裝飾件裏延燈罩左走到銷子左側再進入車內。攝像頭電源插頭和視頻線中的紅線接倒車燈電源，由倒車燈單線延長到攝像頭附近。倒車燈是尾燈最下靠裏的長方白燈，不用卸燈，塑料紐鬆開剝開襯皮可見S6接頭，正負分別為紅藍/白黑：https://www.youtube.com/watch?v=t-R7CL1sxu8#t=2m50 

1.6 加電壓表：https://www.clublexus.com/forums/gs-2nd-gen-1998-2005/868289-diy-adding-a-volt-meter-next-to-clock-2.html 0.28"電壓表。塑料卡扣很容易斷，用扁起子撬不要用手掰；透光麵板背麵有6個熱壓柱，尖嘴鉗掰斷。脫開時鍾板後焊接。後罩右側開孔，用熱熔膠加支撐再將電壓表粘在其上，最後把麵板粘回。圖片見上右，該買綠色的。

2. 行車記錄儀 （早期計劃）

http://www.clublexus.com/forums/gs-second-generation/788620-how-to-remove-compass-rear-view-mirror.html#ixzz3dtoq39nB

http://thedashcamstore.com/advanced-dashcam-installation Lexus：https://www.youtube.com/watch?v=w-BZLlF1wN8 

我的行車記錄儀包括綁在現有反光鏡上的二合一反光鏡/屏幕主機、後視攝像頭和相關電線。

屏幕的電源可以是：1. 插入點煙；2. 直接連去ACC電源，即鑰匙在ACC及開車位置就有電的某個車上熔絲座。GS300駕駛側/乘客側台板下麵都有熔絲盒，擰動鑰匙並測量各熔絲，或查手冊可得開啟後才有電的熔絲座，如CIG，可以把正極繞在熔絲接頭上，也可買專用的轉接座或占用空的熔絲座；3.直接連去卸開後的頂部燈盒，方法在視頻鏈接一，但有車型限製。對於去台板下麵有熔絲盒的布線，是主機出來的浮線去前玻璃，沿邊緣走到門邊，再往下，一般均可嵌入車邊而不用拆卸各蓋板。不過本車是絨布邊比Sienna的橡膠邊硬。

倒車攝像頭前端類似耳機插頭插入主機，後端攝像頭安裝在拍照上方，兩根電源線接去倒車燈電源，這樣倒車時屏幕自動增加倒車刻度。我的山寨佳能記錄儀，後視影像一直有的。布線是由牌照、背板、後門吊臂內走線、車邊到倒車燈電源。參考Sienna行車記錄儀安裝，Odyssey Android係統安裝擴展。

fuse: http://www.carcarekiosk.com/video/2000_Lexus_GS300_3.0L_6_Cyl./fuse_interior/replace 

http://www.justanswer.com/lexus/6pj98-lexus-gs300-2001-gs300-question-fuse-box.html 

https://www.manualowl.com/am/Lexus/2005-GS%20300/Manual/6430 

上述說明書p339有座下熔絲盒參數。駕駛側下熔絲盒是個L型蓋，左側小珠手柄一拉就開。下麵鏈接用乘客側熔絲盒空餘座：http://www.clublexus.com/forums/gs-second-generation/788620-how-to-remove-compass-rear-view-mirror.html#ixzz3dtoq39nB

01-05 GS300 back view mirror is shown below, black/red are +12V/GND can be used for DVR.

我的計劃：主機用頭頂處（有源）反光鏡處的電源。後攝像頭直接裝在牌照上方車體上，電源線接倒車燈，視頻線進車裏後沿頂板邊緣拉去駕駛或乘客側，通常可藏在門封條裏，在前玻璃上方到反光鏡處改明線。如果能用發光鏡電源最好。

拆反光鏡的步驟：GS 3^rd gen (06-11) http://www.clublexus.com/forums/gs-3rd-gen-2006-2011/556707-rearview-mirror-question-3.html#ixzz3qsFETxcR

1. Just remove the hex bold from under the mirror. It is exposed so you can just take a 3/16 or so size hex key or a tiny flat head screwdriver.

2. you would need to remove the 'nose' and the cover on the roof panel. On the '06 GS430, the panel you remove is the most forward one, in front of where your sunglass holder drop down is. It pops right of, just do it gently and carefully. I did it with just my fingers. You can put your fingers in the groove facing the windshield and work your way to the sides and back. It is held by clips to the sides, with two big white clips on the left and right. Once you pop the panel, the 'nose' or middle piece should come with it. The nose is to hide the wires that run all the way to the roof panel.

3. Once you remove that, you can slide the mirror off of its support. It's kind of like a hook support, kind of what you would use to hang your towels in your bathroom. To slide it off, just slide the mirror upwards. The support itself is attached to the windshield. By this time your mirror will be dangling by the wire (for power, compass etc.)

4. Slide the clip from the wire from the connector in the roof assembly. You would then need to carefully wiggle the clip out of the opening to fully get your mirror. At first it may seem impossible and you may seem tempted to cut the wire. DON'T. you can push up on the cloth/roofliner piece to push the connector through the seemingly small opening and carefully wiggle it out. Trust me, it will work.

To reassemble, just follow the reverse. First, I hooked the mirror back on the windshield support by sliding it down and hold it in place. Next I pushed the clip back into the small opening and connected i back to the connector in the roof assembly. Then I put the cover and nose back on and slowly push back until everything clicks back in place.

SC430:

The mirror stem has a clip with 4 tabs that go up into the bracket on the windshield.

I did this from passenger seat, while looking up at mirror. Gently turn the mirror and stem about 1/8 turn counter clockwise, it should swivel where it mounts to windshield, do not force it, it should turn about 1/8 and then stop.

After it stops turning the tabs should be at at spot on the bracket where they can slide down and out. If the mirror turns and stops (looks like your unscrewing from windshield but it only goes 1/8 turn) gently wiggle the mirror and it should come out of the bracket. At this point you can let the mirror hang from the wires for a few min.

If you look in the mirror stem you will see a metal clip with 4 tabs held in with 1 screw, remove screw and clip.

This is where the tightening comes in, the clip with 4 tabs, the tabs are what slide into clip and hold mirrior tight. Take pliers and just slightly (just a hair) bend all 4 clips downward, if you can see a difference then you may have bent it too much. If you bend too much the clip will break, I used needlenose and I wasn't even sure if I bent them at all, but when I put the mirror back on the widshield there was a huge difference.

The mirror is very tight now, no vibration at all. One thing I do need to mention is that when I went to remove the clip from the stem the screw started coming out with almost no effort, so in my case that screw may have been loose a couple turns, I didn't think much at the time but now i'm wondering if that wasn't the case. My point is if that was the case then bending the tabs may not have been the fix, it may have been tightening the screw.

To re-install just put the clip back in stem, make sure screw is tight, insert the clip back into the bracket with mirror turned, turn the mirror gently back clockwise until the stem is vertical. hopefully your mirror is tight.

拆尾燈：https://www.youtube.com/watch?v=NNeN_LFiH74&t=198s 

2010 Lexus power from mirror: https://www.youtube.com/watch?v=GuSZs2jVJY4 

2016 power from top: https://www.youtube.com/watch?v=HREsNkvLBig 

remove mirror cap: https://www.youtube.com/watch?v=5nTKn6qStS4 

3. Radio wiring

https://www.clublexus.com/forums/gs-2nd-gen-1998-2005/697113-2001-gs300-radio-circuits-w-o-mark-levinson-wiring-diagram.html? 原廠20頭，地線是pin20 Wht/Blk。Radio處Blu/Yel是Dome Fuse 10A。Amp處插頭由上至下為12/8/10/6芯，10芯腳為FR+/FL+/NC/+B(Radio fuse 30A)/FR-/FL-/...，6芯為RR+/RL+/RR-/WF+/WF-/RL-。

https://portal-diagnostov.com/en/payment-d/?page_s=373064 Back light+/-是紅黑/白黑在左後輪上方。