Epson ELPDC21: Difference between revisions

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{{stub}}
{{Device page
{{Device page
|Manufacturer=Epson|Device release date=2016}}
|Manufacturer=Epson
|Has code name=H757MA_R2 2176136
|Device type=Camera
}}
 
At the moment this page only describes the mainboard called H757MA_R2 2176136. It is not known if other revisions exist or not.


==Guides==
==Guides==
Line 8: Line 12:
==Device pictures==
==Device pictures==
<gallery showthumbnails="1">
<gallery showthumbnails="1">
File:Example device pictures.jpg
File:Epson ELPDC21 document camera.jpg|The device - seen from above.
</gallery>
</gallery>


==PCB pictures==
==PCB pictures==
<gallery showthumbnails="1">
<gallery showthumbnails="1">
File:Example pcb pictures.jpg
File:Epson elpdc21 document camera mainboard top.jpg|Main board - top side
File:Epson elpdc21 document camera mainboard bottom.jpg|Main board - bottom side
File:Epson elpdc21 document camera pcb camera head.jpg|PCB in camera head
</gallery>
</gallery>


==Reference measurements (also schematics if available)==
==Reference measurements (also schematics if available)==
<gallery showthumbnails="1">
<gallery showthumbnails="1">
File:Example measurement pictures.jpg
File:Epson elpdc21 document camera power rails measured.jpg|Voltages measured on a working unit
File:Epson elpdc21 document camera power rails measured zoomed in on two regulators.jpg|Measured voltages - Zoomed in on two smaller regulators
File:Epson elpdc21 document camera uart signals.jpg|Uart Signals
File:Epson elpdc21 document camera spi pins found.jpg|SPI communication pins between main CPU and Thine ISP chip
File:Epson elpdc21 document camera power button signal.jpg|The power button signal
File:Epson elpdc21 document camera main cpu reset signal.jpg|Main CPU (SoC) reset signal
File:Epson elpdc21 document camera what the traces look like under the thine chip.jpg|Under the THP7321
File:THP7312 bottom substrate.JPG|Bottom of the THP7312
File:Epson elpdc21 document camera I2c scl sda.jpg|I2C SCL and SDA lines
</gallery>
</gallery>


==More Information/External Sources==
==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!
 
=== Voltages measured on working product (after turning on) ===
{| class="wikitable"
|+
!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 ===
{| class="wikitable"
|+
!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 ===
{| class="wikitable"
|+
!Component
!Pin #
!Name
!Comment
|-
|CN1600
|7
|UART_TX
|(TX from the board's perspective, runs at 460800 bps)
|-
|CN1600
|9
|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/CN1000*
|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
|}
 
<nowiki>*</nowiki> not clear from the silk screen, please see images above

Latest revision as of 01:43, 27 January 2024

Epson ELPDC21
Manufacturer Epson
Code name H757MA_R2 2176136
Release date
Device type Camera



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

 TypeDifficulty
Epson ELPDC21 Debugging UARTTroubleshooting/Diagnostics3. Hard

Repair Guides

 Affects partTypeDifficulty
Epson ELPDC21 Not turning on, led blinkingConnectorsTeardown2. Medium

Device pictures

  • The device - seen from above.

    The device - seen from above.

PCB pictures

  • Main board - top side

    Main board - top side

  • Main board - bottom side

    Main board - bottom side

  • PCB in camera head

    PCB in camera head

Reference measurements (also schematics if available)

  • Voltages measured on a working unit

    Voltages measured on a working unit

  • Measured voltages - Zoomed in on two smaller regulators

    Measured voltages - Zoomed in on two smaller regulators

  • Uart Signals

    Uart Signals

  • SPI communication pins between main CPU and Thine ISP chip

    SPI communication pins between main CPU and Thine ISP chip

  • The power button signal

    The power button signal

  • Main CPU (SoC) reset signal

    Main CPU (SoC) reset signal

  • Under the THP7321

    Under the THP7321

  • Bottom of the THP7312

    Bottom of the THP7312

  • I2C SCL and SDA lines

    I2C SCL and SDA lines

More Information/External Sources

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 9 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/CN1000* 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

* not clear from the silk screen, please see images above

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