key: ≡ parallel, ↔ serial, ~ LVDS, _ unknown, ✘ discarded as not useful
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LCD Description |
|
|---|---|
| Model | MDP12BS17-SR-T (2142717-01) |
| Manufacturer | |
| Recovered from | Epson WF-2530 |
| LCD type | positive |
| Polarizer type | reflective |
| Columns | 16 1) |
| Rows | 2 |
| Char matrix | |
| Driver IC | mounted on LCD glass (CoG) |
| Backlight | - |
| Arduino driver | |
| Connector | pins |
| Num Pins | 8 |
| Pin spacing | 0.07“ |
LCD1 Pinout
| Arduino test rig 2) | ||||
|---|---|---|---|---|
| Pin# | IC pin | Label | Pin | colour |
| 1 | (cn1 pin 8) | |||
| 2 | CS? | (74VHC595 pin 4 (Qe)) | ||
| 3 | (cn1 pin6 via 100Ω) | |||
| 4 | CLK? | (cn1 pin5 via 220Ω), (74VHC595 pin 11 (clock) via 220Ω), (74VHC165 pin 2 (clock) via 220Ω) | ||
| 5 | (cn1 pin2), (74VHC165 pin 9 (QH) via 3.3k) | |||
| 6 | Vcc? | |||
| 7 | GND | |||
| 8 | capacitor to GND | |||
JK33149A, 2142717-01 Board, CN1 pinout
| Arduino test rig 3) | ||||
|---|---|---|---|---|
| Pin# | IC pin | Label | Pin | colour |
| 1 | Buzzer- | |||
| 2 | (lcd pin5) | |||
| 3 | GND | |||
| 4 | Vcc? | |||
| 5 | CLK? | (lcd pin4 via 220Ω), (74VHC595 pin 11 (clock) via 220Ω), (74VHC165 pin 2 (clock) via 220Ω) | ||
| 6 | (lcd pin3 via 100Ω) | |||
| 7 | (74VHC595 pin 13 (output enable)) | |||
| 8 | (lcd pin1) | |||
| 9 | (74VHC165 pin 1 (parallel load)) | |||
| 10 | SW1 (closes to gnd) (power button) | |||
IC1, 74VHC165 (8bit parallel line/serial out shift register) is used for serializing the keyswitch selections,
IC2. 74VHC595 (8-Bit Shift Register with Output Latches) is used for decoding serial data to latched outputs to turn on status LEDs (Power, Wifi, ADF) and one LCD control line (chip select?)
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