Brother FAX-921, MFC-970MC, FAX-931 service manual Others

Trouble		Check:
(7) Image distortion
In communications	•	Error code displayed (Refer to Section 1, "ERROR INDICATION"
		in this chapter.)
	• NCU PCB
	• Main PCB
At the scanner	•	Separation roller and its related sections
	•	LF roller and its related gears
	•	Solenoid and the planetary gear train
	•	Drive motor and its harness
	• Main PCB
At the recorder	•	Compression springs beneath the recording head
	•	Platen and its related gears
	•	Solenoid and the planetary gear train
	•	Drive motor and its harness
	• Main PCB

[ 6 ]	Others
	Trouble			Check:
(1)	When you turn the power ON,	• Main PCB
	the beeper sounds.	TIP: The beeper sounds with one of the following three beep
		codes:
			Beep code	In approx. 2-second cycle of	Defective device
			Beep code 1	LHLHLHLHm	RAM
			Beep code 2	HLHLLHLHm	EEPROM
			Beep code 3	HLHLHLHLm	Program ROM
		H: Beeps at 1.5 kHz for 0.1 second
		L: Beeps at 1.2 kHz for 0.1 second
		m: 0.5-second mute
		Between L and H, H and L, or L and L is a 0.1-second pause
		each.

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