JVC HD-52Z575 Section Troubleshooting, SELF-CHECK Feature 5.1.1 Outline, Failure History

SECTION 5

TROUBLESHOOTING

5.1 SELF-CHECK FEATURE 5.1.1 OUTLINE

This unit comes with the SELF-CHECK feature, which checks the operational state of the circuit and displays/saves it during failure. SELF-CHECK is performed when power is turned on, and information input to the main microcomputer is monitored at all time. SELF-CHECK is displayed in 2 ways via screen display and LED flashes. Failure detection is based on input state of I2C bus and the various control lines connected to the main microcomputer.

5.1.2HOW TO ENTER THE SELF-CHECK DISPLAY SCREEN Before entering the SELF-CHECK display mode, confirm that the setting of TV / CATV SW of the REMOTE CONTROL UNIT is at the "TV" side and the setting of VCR / DVD SW is at the "VCR" side. If the switches have not been properly set, you cannot enter the SELF-CHECK display mode.

(1) Press the [SLEEP TIMER] key and set it to 0 minutes.

(2) Press the [VIDEO STATUS] key and [DISPLAY] key simultaneously, then enter the SERVICE MENU.

(3) Press the [2] key to enter the SELF-CHECK mode.

5.1.3HOW TO EXIT THE SELF-CHECK DISPLAY SCREEN TO SAVE FAILURE HISTORY :

Turn off the power by unplugging the AC power cord plug when in the SELF-CHECK mode.

TO CLEAR (RESET) FAILURE HISTORY :

Turn off the power by pressing the [POWER] key on the remote control unit when in the SELF-CHECK display screen.

5.1.4 FAILURE HISTORY

Failure history can be counted up to 9 times for each item. When the number exceeds 9, display will remain as 9. Failure history will be stored in the memory unless it has been deleted.

NOTE :

Only SYNC (with/without sync signals) will be neither counted nor stored.

5.1.5POINTS TO NOTE WHEN USING THE SELF-CHECK FEATURE

In addition to circuit failures (abnormal operation), the following cases may also be SELF-CHECK as "Abnormal" and displayed and counted as "NG".

(1)Temporary defective transmissions across circuits due to pulse interruptions.

(2)Misalignment in the on/off timing of power for I2C bus

(VCC) when turning on/off the main power. SELF-CHECK may be impeded if a large number of items are displayed as "NG". As such, start SELF-CHECK only after 3 seconds in the case of receivers and 5 seconds in the case of panels upon turning on the power. If recurrences are expected, ensure to clear (reset) the failure history and record the new SELF-CHECK results.

<SERVICE MENU SCREEN>

SERVICE MENU

1.ADJUST

2.SELF-CHECK

3. I2C STOP
		Fig.1
	< SELF-CHECK SCREEN >
LOB	OK	FAN		OK
SYNC	M:OK	S:OK		HD:OK
TIM	OK
MSM	OK	DIGI		OK
MEM	OK	AVSW		OK
YC	OK	AIO		OK
TUN	OK	GCR		OK
IP	OK	RGB		NG 2
DVI	OK	HDMI		OK
Item		Item
	CHECK
	Normality		: OK
	Abnormality		: NG
		Fig.2

1-34 (No.YA092B)