JVC DVL720U, DVL522U, DVL320U Emergency Display, Example in case of the error number E01, Lcd

1.7 EMERGENCY DISPLAY

Whenever some abnormal signal is input to the syscon CPU, an error number (E01, as an example) is displayed on the LCD monitor or (in the electronic view finder).

In every error status, such the message as shown below alternately appear over and over.

•In an emergency mode, all operations except turning on/ off the POWER switch are ineffectual.

Example (in case of the error number E01):

E01	E01
UNIT IN	REMOVE AND
SAFEGUARD MODE	REATTACH BATTERY

LCD	Emergency	Details		Possible cause
display	mode
E01	LOADING	In the case the encoder position is not shifted	1. The mechanism is locked during mode shift.
		to the next point though the loading motor has	2. The mechanism is locked at the mechanism loading
		rotated in the loading direction for 4 seconds	end, because the encoder position is skipped during
		or more. This error is defined as [E01].	mechanism mode shift.
			3. No power is supplied to the loading MDA.
E02	UNLOADING	In the case the encoder position is not shifted	1. The mechanism is locked during mode shift.
		to the next point though the loading motor has	2. The mechanism is locked at the mechanism loading
		rotated in the unloading direction for 4 seconds	end, because the encoder position is skipped during
		or more. This error is defined as [E02].	mechanism mode shift.
E03	TU & SUP REEL	In the case no REEL FG is produced for 4 sec-	1. The idler gear does not engage with the reel disk well.
	FG	onds or more in the capstan rotation mode af-	2. Though the idler gear and reel disk are engaged with
		ter loading was complete, the mechanism mode	each other, the tape is not wound because of over-
		is shifted to STOP with the pinch roller set off.	load to the mechanism.
		This error is defined as [E03].	3. No FG pulse is output from the reel sensor.
		However, no REEL EMG is detected in the	4. No power is supplied to the reel sensor.
		SLOW/STILL mode.	5. Tape transport operation takes place with a cassette
			having no tape inside.
			6. The tape slackens and no pulse is produced until the
			slack is taken up and the tape comes into the normal
			status.
E04	DRUM FG	In the case there is no DRUM FG input in the	1. The drum cannot be started or drum rotation is stopped
		drum rotation mode for 4 seconds or more. This	because tape transport load is too high.
		error is defined as [E04], and the mechanism	1) Tape tension is extremely high.
		mode is shifted to STOP with the pinch roller	2) The tape is damaged or soiled with grease, etc.
		set off.	2. The DRUM FG signal is not received by the syscon
			CPU.
			1)	Disconnection in the middle of the signal line.
			2)	Failure of the DRUM FG pulse generator (hall ele-
				ment).
			3. No drum control voltage is supplied to the MDA.
			4. No power is supplied to the DRUM MDA.
E05	–	–		–
E06	CAPSTAN FG	In the case no CAPSTAN FG is produced in	1. The CAPSTAN FG signal is not received by the syscon
		the capstan rotation mode for 2 seconds or	CPU.
		more. This error is defined as [E06], and the	1)	Disconnection in the middle of the signal line.
		mechanism mode is shifted to STOP with the	2) Failure of the CAPSTAN FG pulse generator (MR
		pinch roller set off.		element).
		However, no CAPSTAN EMG is detected in the	2. No capstan control voltage is supplied to the MDA.
		STILL/FF/REW mode.	3. No power is supplied to the CAPSTAN MDA.
			4. The capstan cannot be started or capstan rotation is
			stopped because tape transport load is too high.
			1)	Tape tension is extremely high. (Mechanical lock-
				ing)
			2)	The tape is damaged or soiled with grease, etc.
				(Tape tangling occurs, etc.)
				(DVC_03)
		Table 1-7-1

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