Lexmark T64X -- Fuser Resistances & Pin Assignments

Resistance Values

Lamp Circuit: Approx. 1.5 ohms.

Thermistor: Approx. 350 kohms at room temperature.

- - -

Cable Connection J1

1. NARMEDIA*^[1]

2. Thermistor Return -- J5-1

3. Thermistor -- J5-2

4. GND^[2]

5. THUMP -- J4-2

6. +5V

7. THUMPRET -- J4-1

8. EXIT SNS*^[1]

9. +3.3V^[3]

10. CLK^[3]

11. DATA^[3]

- - -

Notes:

[1] Paper present = LO; Paper not present = HI.

[2] Lexmark's practice is to tie DC (logic) ground to chassis ground. You can always use chassis ground for a ground reference on Lexmark's machines.

[3] The T64X fuser PCA has a serial EEPROM mounted on its underside. It's an Atmel 24C02BN -- a 2k (256x8) unit. I can find no information regarding why it's there or what it does.

# # #

FEEDBACK

# # #