9
KF-42WE620/50WE620
KF-42WE620/50WE620
Clearing the Result Display
To clear the result display to “0”, press the buttons on the Remote Commander sequentially when the diagnostic screen is displayed, as shown below:
1. Power off (Set to Standby model)
2. Display
Channel 5
Sound Volume -
Power ON
3. Channel 8
ENTER
4. Wait until the initial setup display appears.
5. Disconnect the AC plug and then reconnect it.
Quitting the Self-Diagnostic Screen
To quit the entire self-diagnostic screen, turn off the power switch on the Remote Commander or the main unit.
Self-Diagnostic Circuit
Self-Diagnosis Function Operation
- 3
: Lamp cover
If the lamp cover SW is opened then pin 1 of CN8034 on the A board is high. The LCD Engine u-com (pin 27 of
IC3208 on the C2 board) detects it and turns the lamp off.
- 4
: Fan
If Fan1, Fan2, Fan3, or Fan4 stops then pin 2, 5, 8 or 11 of CN8035 on the A board is high. The LCD Engine
u-com (pin 24 of IC3208 on the C2 board) detects it and turns the lamp off.
- 4
: Temp
If a temperature sensor on the H4 board detects a high temperature,
or the IIC-E line connector (CN8041:A board,CN3951 H4 board) is not attached securely, the LCD Engine u-
com IIC-E Line detects it and turns the lamp off.
- 5
: Lamp drive
If a lamp is not turned on, then pin 29 of LCD Engine u-com (IC3208 on the C2 board) is high and checks pin
28 of LCD Engine u-com. If pin 28 is low, it is judged no high voltage.
- 6
: +BOVP
If +17V line drops then pin 53 of MAIN u-com (IC3405 on the C2 board) is low and automatically turns off the
main power.
- 7
: Audio
If DC appears by the audio amp failure at the speaker line then it is detected by MAIN u-com (pin 59 of IC3405
on the C2 board) and automatically turns off the main power.
- 8
: D-OVP
If +3.3V, +2.5V, or +1.8V line over, then pin 49 of MAIN u-com (IC3405 on the C2 board) is low and
automatically turns off the main power.
- LAMP : Lamp
If a lamp is not turned on, then pin 29 of LCD Engine u-com (IC3208 on the C2 board) is high and checks pin
28 of LCD Engine u-com. If pin 28 is high the lamp is burned out.
IC41
27
IIC-E
LAMP COV
28
29
24
LAMP DRV
LAMP PROT
FAN PROT
4:Temp
IC3208
LCD Engine u-com
IC3405
MAIN u-com
49
59
53
SP-DC-PROT
LOW-B-ERR
D-OVP
H3/A board
8:D-OVP
6:+B OVP
G3/A board
G1/A board
17V-DET
CN8014
3:Lamp
cover
5:Lamp
driver
Lamp
4:Fan
Lamp
HV-DET
SW
S3999
T/A board
LAMP-PRT
Fan1
Fan2
Fan3
CN8003
FAN1-PRT
FAN2-PRT
FAN3-PRT
CN8022
Audio
amp
Audio
amp
7:Audio
IC4704
IC8504
C2 board
AU board
A board
Lamp driver
Temp
sensor
+3.3V
+2.5V
+1.8V
+17V
1
2
3
1
2
8
5