Panasonic Toughpad FZ-G1 MK4
The Panasonic Toughpad G1 (FZ-G1 MK4) is a portable industrial rugged field computer. This page is dedicated to reparing the Panasonic Toughpad FZ-G1 MK4.
Built to most of the same specifications as the Toughbook line, they are designed for professional use and are used in a wide variety of industries, including construction, defense, public safety, emergency services, government, healthcare, law enforcement, manufacturing, oil & gas and telecom/utilities.
Contents
Mainboard breakdown
Noted in the silkscreen as DHLB1030ZD/X1.
LCD screen testing procedure.
Mainboard firmware
EC dumps:
Bios dump: badcaps topic
Known issues
- ALC256 shorted 3.3vdc or 5vdc rail. The audio circuit design is not done proper, the ALC will die after a while, the 8ohm speaker output is poor, even on a working tablet.
- TPS51367 shorted killing the CPU or RAM (TPS51367 is a 3-V to 22-V, 12-A synchronous buck converter with ultra-low quiescent current).
Improvements in MK5
In de MK5 board revision noted as DHLB1277ZC/X1 in the silkscreen a few design changes were made.
- CPU was changed from SR2F0 (Intel Core i5-6300U) to SR340 (Intel Core i5-7300U).
- Onboard RAM was doubled from 4096mb to 8192mb.
- The audio circuit and codec were changed from ALC256 to ALC295.
- WWAN simcard slot changed from standard SIM 25x15mm size to 12.3x8.8mm nano SIM size.
- Trusted Platform Module (TPM) chip was changed, can't find anything about it (a good thing I guess, it's under NDA). The IC is made by STMicroelectronics.
Known issues in the MK5
The audio circuit / codec Realtek ALC295 is still flawed. The audio IC fails either open circuit or short circuit, one of the failure modes I have encountered was it still being detected (aplay -l) but only outputting white noise, static noise, or snow throught the 3.5mm audio headphone jack on the HPOUT_R & HPOUT_L pins while the HP_JD (jack detect) was pulled to ground the output from the presummably the mixer block had failed inside the ALC295 IC. The built-in audio class d amplifier block for the internal speaker (not the headphone driver block) inside the ALC295 did not generate any noise (dead silent). However I was unable to find any datasheet or boardview that intergrates the ALC256 or ALC295 I was unable to look deeper in this problem. Not to mention that both codec's show a awful lot of issues on kernel.org or various other linux bugreport places it does indicate to me that these models of Realtek ALC were flawed by design and this is why they are quickly been replace by their successor.
AMI Model No. Configuration Port Modules
Here's a list of module expansion configurations.
- "FZ-G1R0008T3" for No option (blank port)
- "FZ-G1R6031T3" for Panasonic Gigabit LAN Port
- "FZ-G1R0010T3" for Panasonic 1D/2D Barcode Reader
- "FZ-G1RxxxxTx" for USB port
