More actions
| Epson ELPDC21 | |
|---|---|
| Manufacturer | Epson |
| Code name | |
| Release date | |
| Device type | Camera |
This article is a stub. You can help Repair Wiki grow by expanding it
At the moment this page only describes the mainboard called H757MA_R2 2176136. It is not known if other revisions exist or not.
Guides
Explanatory Guides
| Type | Difficulty | |
|---|---|---|
| Epson ELPDC21 Debugging UART | Troubleshooting/Diagnostics | 3. Hard |
Repair Guides
Create a Guide
Device pictures
PCB pictures
Please consider contributing pictures to this section!
Reference measurements (also schematics if available)
Please consider contributing pictures to this section!
Voltages measured on working product (after turning on)
| Component RefDes | Voltage | Type |
|---|---|---|
| C2008/C2011/L2000 | 5.15V | Switching |
| C1911/C1912/L1903 | 3.3V | Switching |
| C2012/L2001 | 1.2V | Switching |
| C1905/L1901 | 1.35V | Switching |
| C1910/C1922/L1902 | 1.42V | Switching |
| C1904/L1900 | 3.0V | Switching |
| C2003/IC2000 | 3.3V | Linear |
| C2009/IC2003 | 1.8V | Linear |
| C1804/IC1800 | 3.33V | Linear, Always On |
Partial BOM
| Component RefDes | Marking | Name | Comment |
|---|---|---|---|
| IC2002, IC1903, IC2004, IC1901, IC1902, IC1900 | QTZ | TPS62140RGTR/TPS62140RGTT | Step-down converter |
| IC2000 | NR1 | TLV70033DSER/TLV70033DSET | 3.3V linear regulator |
| IC2003 | NK1 | TLV70018DSER/TLV70018DSET | 1.8V linear regulator |
| IC1800 | LPBG | LP2981-33 | 3.3V linear regulator |
| IC1600, IC1603 | G8Y | S-80928CNNB-G8YT2x | 2.8V Voltage detector with delay (IC1600 resets the main CPU, IC1603 resets the smaller microcontroller IC1000) |
| IC1000 | C17W04F10J | Epson S1C17W04 | 16-bit Microcontroller, Always On |
| IC900 | Hynix H27U4G8_6F2D / H27S4G8_6F2D | Nand Flash | |
| IC1300 | THP7312 | THine THP7312 | ISP chip |
| IC1 | MCIMX6D5EYM10AD | IMX6DQCEC | Main CPU: i.MX 6Dual/6Quad Applications Processors for Consumer Products |
| C205 | 220nF | Author replaced mechanically damaged component, not sure about correctness of this measurement, but product worked with replacement. | |
| C272 | 100nF | Author replaced mechanically damaged component, not sure about correctness of this measurement, but product worked with replacement. | |
| R209 | 9.1 ohm | Author replaced mechanically damaged component, not sure about correctness of this measurement, but product worked with replacement. | |
| R353 | 0 ohm link | Author replaced mechanically damaged component, not sure about correctness of this measurement, but product worked with replacement. |
Useful Signals
| Component | Pin # | Name | Comment |
|---|---|---|---|
| CN1600 | 7 | UART_TX | (TX from the board's perspective, runs at 460800 bps) |
| CN1600 | 8 | UART_RX | |
| CN1300 | 10 | I2C_SCL | I2C line is shared by devices on the motherboard, but also goes to the camera head |
| CN1300 | 11 | I2C_SDA | |
| IC1600 | 4 | Reset of the main CPU | Short this to ground to cause a main CPU reboot. (this is an open drain output of the voltage detector, so it's okay to short to ground) |
| CN2001 | 2 | Power Button | Short this to ground to prompt the board to boot even when the flex cable to the interface board is not connected |
More Information/External Sources
You can manually link to external sources for additional information that might not fit here but are useful such as BIOS image dumps, firmware, etc!