Konica 7055 - desperate for help

[JERRY D]

Upper fuser lamps don't cycle off, causing overheat error. New thermistors installed, continuity to control pcb checked, control pcb tested by hytec & no trouble found. What am i missing?

[mrwho]

	Quote:			Originally Posted by JERRY D
	Upper fuser lamps don't cycle off, causing overheat error. New thermistors installed, continuity to control pcb checked, control pcb tested by hytec & no trouble found. What am i missing?

DESCRIPTION: F34-1 shortly after warm-up.

CAUSE: Failed DCPS board. The upper fuser roller heat lamp (L2) is not shutting OFF after copier has reached warm-up.

SOLUTION: To confirm, verify L2 operation in diagnostics (power ON the copier while holding down the 4 and 7 keys). DO NOT press any output code. The fuser unit heat lamps (L2, L3 or L4) should NOT be lit. If any of the lamps are ON, replace the DCPS board (p/n 55FA84512).

[mrwho]

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