add consequence of not following polarity

src/SUMMARY.md

@@ -2,6 +2,7 @@
 
 - [Build and test firmware](./build_test_firmware.md)
 - [Hardware](./hw/hardware.md)
+  - [Sinara Kasli](./hw/kasli.md)
   - [Sinara Kasli-SOC](./hw/kasli_soc.md)
   - [Sinara 4624 AWG Phaser (Upconverter/Baseband)](./hw/phaser.md)
   - [Sinara 4456 synthesizer Mirny / Sinara 4457 Almazny Mezzanine card](./hw/mirny_almazny.md)

src/hw/kasli.md

@@ -0,0 +1,9 @@
+# Kasli
+
+## Mounting fan onto heatsink
+![](../img/kasli_fan.jpg)
+1. ⚠️ Verify the fan has the **correct polarity (powering on with wrong polarity will burn the MOSFET in series💥)**
+2. Place the fan on a heatsink
+3. Tap 3 threads on the heatsink using M2.5 pointy tapping screws (e.g. front panel screws)
+4. Replace the tapping screws with M2.5x14mm screws
+5. Verify the fan is secure

src/hw/kasli_soc.md

@@ -5,4 +5,12 @@
 Check the BOOT mode switches - they both should be at SD if the Kasli-SoC going to be shipped to customer.
 POR jumper needs only for JTAG mode.
 
-![](../img/kasli_soc.jpg)
+![](../img/kasli_soc.jpg)
+
+## Mounting fan onto heatsink
+![](../img/kasli_soc_fan.jpg)
+1. ⚠️ Verify the fan has the **correct polarity (powering on with wrong polarity will burn the MOSFET in series💥)**
+2. Place the fan on a heatsink
+3. Tap 3 threads on the heatsink using M2.5 pointy tapping screws (e.g. front panel screws)
+4. Replace the tapping screws with M2.5x14mm screws
+5. Verify the fan is secure