I spent quite a few evenings this week installing new speakers.
On Tuesday I did the 4 door speakers. I can't believe how "light weight" the OEM speakers are. Total rubbish, hardly worth keeping them in storage, they are never going back in the car. After my modification to the
ICC to reduce the hiss (and max volume) these JL C2 600X required big equaliser adjustments to get a good amount of quality sound - pumped up the bass and mid-range, drop down high-range (I've got 6 tweeters now after all). These speakers really could use a more powerful AMP.
On Wednesday, I spent the evening decoding the FG2 AMP module's plug (documented above). I wired up things and connected it to the car (just in the passenger seat well). I only bought a very cheap 8" subwoofer speaker (more on that below) and it was sort of distorting, unless I held it steady - I would have to install it properly to really test it out. It sounded pretty good though and I had to use the equaliser again to now reduce the bass (only mid-range is higher now - bass and high-range are at 0 level).
On Thursday, I pulled the back parcel trim off, removed the padding they have that covers the subwoofer speaker hole on lower models and tried for a long time to get the speaker to be screwed in! Did I say very cheap 8" subwoofer speaker? Well, the screw holes on this cheap unit didn't quite meet up with the screw holes in the shelf, they are in the right place sort of, but this speaker is just a bit small. Out with the metal snips to remove the screw hole outer loop and it was in. I had decided to mount the AMP under the passenger seat (which would now be on Friday) so I sent the speaker wire through the car under all the plastic trims along the foot wells.
I have to say, I was worried that I didn't modify the subwoofer output like I did the 4 speakers to remove the hiss (for one there may be hiss in the sub and two, that the sub would be mismatched in volume). Nope. This premium sound AMP is pretty weak really - so it matches my modification quite well. Actually, the sound system is now really sounding good and can go as loud as I would ever want.
On Friday, I pulled out the passenger seat, cleaned up the carpet underneath, yuck, went looking for a good grounding point.. couldn't find one that worked. Tried the seat bolts, nope. Tried the
ICC bolts (4 at the bottom, 2 of which look like a great connection) this didn't work either, the AMP just didn't like any of the car-body points I tried. I ended up using the cigar lighter socket ground. Then I used 2 mat holders (the type with a L shape pin you insert into the carpet) to hold a MDF board with the AMP screwed into it in place.
I'm actually really happy with the sound it produces now, the only thing I don't like is when one MP3 stops and another starts there is a slight crackle. I'm sure it was there before too, but I'm not sure if because I have the volume up more, to counter the hiss fix, that it is now more noticeable? Little things though.
Anyway, to stay on topic, I spent today documenting the FDIM's components:
Large Board
U100 LTDXS LT3972 - 3.5A Step-Down Switching Regulator
U102 ST GN LF33 - 3.3v Regulator (takes +5.0v input here)
U103 MAX1694 - USB Current Limited Switches with Fault Blanking
U104 LTUE LT1947EMS - Linear Technology Adjustable Output TFT-LCD Triple Switching Regulator
U106 LT3517 - Full-Featured LED Driver with 1.5A Switch Current
U200 MCIMX31LCVMN4D - SoC Multimedia Applications Processors For Industrial And Automotive Products
U202 Micron-MT29F1G08ABADAWP-IT_D - 1Gb Flash (128MB)
U202 Micron-MT29F4G16ABBDAH4-IT_D - 4Gb Flash (512MB SAT NAV Version)
U204/U205 H5MS1G62MFP-J3M - 1Gb DDR SDRAM (128MB) * 2 = 256MB Total RAM
U206 LTSR LTC3545EUD#PBF LCSR QFN16 Triple 800mA Regulator
U208 MAXIM 6894E - Volt Supervisor Sequencer 28-Pin TQFN EP
U400 USB83340 - Automotive USB Transceiver
U402 V25 02 02 X331 - ? 8 Pin
U405 WT245 SN74AVC4T245 - Two Bit Dual-Supply Bus Transceiver (3-State)
U408 PCA9517A - Level Translating I2C-bus Repeater - NXP
U410 TJA1042 NXP High-Speed CAN Transceiver
U600/U601/U602 WE245 SN74AVC8T245PWR - 8 Bit Dual-Supply Bus Transceiver (3-State)
U603 V74 05 02 X202 - ? 8 Pin
U605 TSC2007 - Very low power Touch Screen
U800 V25 02 02 X331 - ? 8 Pin
U801 LMV824-N Quad low voltage, RRO, 5 MHz
op amps
U802 wm8580a - Multi Channel Audio Codec
U803 LMV822-N Dual low voltage, RRO, 5 MHz
op amps
U900 bc57g687cau - Bluetooth
U901 2162 QFN20 MFI341S2162 - IC-BUS Driver
U1000 TVP5150AM1 - Ultralow-Power NTSC/PAL/SECAM Video Decoder (to 8-bit ITU-R BT.656 format)
U1001 WE245 SN74AVC8T245PWR - 8 Bit Dual-Supply Bus Transceiver (3-State)
U1002 WT245 SN74AVC4T245 - Two Bit Dual-Supply Bus Transceiver (3-State)
U1003 PCA9517A - Level Translating I2C-bus Repeater - NXP
Small Board
Q170 SQD15N06-42L - Automotive N-Channel 60V (D-S) 175c MOSFET (15Amps)
U170 AOE - ? 8 Pin
U171 LE80CD-TR - 8.0v Regulator (100mA)
U175 29152 - Voltage Regulator
U1300 3793-7 - Voltage monitor with watchdog Timer
U1301 F3614M2 1201KE400 (A) SGP - Programmable Microcontroller
U1302 ISL12022MIBZ-T – Real Time Clock (RTC) IC Clock/Calendar 128B I²C, 2-Wire Serial 20-SOIC
U1303 ATMLP140 08B 2 1G1354B - ? 8 Pin