Self Diagnosis; Displaying The Self Diagnosis Indications; Led Indication - Panasonic BT-H1700BMC Service Manual

2.1 SELF DIAGNOSIS

The unit incorporates a self-diagnosis function and is capable of indicating the absence of raster by blinking on the front panel LEDs
and the on-screen display.

2.1.1 DISPLAYING THE SELF DIAGNOSIS INDICATIONS

(1) LED indication: When raster is absent, the six LEDs of INPUT SELECT A to F on the front panel blink to indicate this condition.
(2) On-screen display: The self diagnosis results can be displayed when the unit is on.

2.1.2 LED INDICATION

(1) Operation during an LED indication:
The main microcomputer detects any abnormalities in communication on the I
At the same time, the unit is turned off to protect it but the LEDs keep on blinking.
At this time, the main microcomputer does not accept commands except for the POWER switch on the front panel.
(2) How to cancel the LED blinking:
Press the POWER switch on the front panel to turn the unit ON again.
(3) Types of LED indications
LED INDICATION TYPE ON-SCREEN DISPLAY
INPUT A blinking
at 0.5-second
intervals
INPUT B blinking
at 0.5-second
intervals
INPUT C blinking
at 0.5-second
intervals
INPUT D blinking
at 0.5-second
intervals
INPUT E blinking
at 0.5-second
intervals
INPUT F blinking
at 0.5-second
intervals
TROUBLESHOOTING
I 2 C-0 Communication error in the signal buses
DEFLECTION BUS (SCL0, SDA0) of I
2
I C-1 SIGNAL BUS Communication error in the signal buses
(SCL1, SDA1) of I
I 2 C ROM BUS Communication error in the ROM buses
(SCL2, SDA2) of I
X-RAY X-rays detected
OCP Overcurrent detected
VOFF Neck-break prevention detected
2 C and causes the LEDs to blink.
DIAGNOSIS RESULT
2
C
2
C
2 C
MALFUNCTIONING CIRCUIT
• SIGNAL PWB ASS'Y
IC801
• MAIN PWB ASS'Y
IC510
• MOTHER PWB ASS'Y
IC103
• REMOTE PWB ASS'Y
IC102, IC103
• SIGNAL PWB ASS'Y
IC104, IC601, IC801
• FRONT CONTROL PWB ASS'Y
IC101
• SIGNAL PWB ASS'Y
IC801, IC805
• SUB DEF MODULE PWB ASS'Y
IC001
• SIGNAL PWB ASS'Y
IC801
• HV CONTROL MODULE PWB ASS'Y
IC503
• SIGNAL PWB ASS'Y
IC801
• MAIN PWB ASS'Y
• SIGNAL PWB ASS'Y
IC801
• SUB DEF MODULE PWB ASS'Y
IC005
ELE-61