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Epson ELPDC21

From Repair Wiki
Epson ELPDC21
Manufacturer Epson
Code name
Release date
Device type Camera


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Guides

Explanatory Guides

 TypeDifficulty
Epson ELPDC21 Debugging UARTTroubleshooting/Diagnostics3. Hard

Repair Guides

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Device pictures

PCB pictures

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Reference measurements (also schematics if available)

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Mainboard named H757MA_R2 2176136

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!