Sharp PN-Y475 Service Manual ▷ View online
PN-Y325/Y425/Y475/Y555 TROUBLESHOOTING 8 - 4
7. CAN NOT CONTROL RS-232C CONNECTION
8. CAN NOT CONTROL LAN CONNECTION
: ‘14/September
PN-Y325/Y425/Y475/Y555 TROUBLESHOOTING 8 - 5
9. THE LED LIGHTS UP IN ORDER OF RED 3 GREEN (TEMPERATURE ERROR)
10. CAN NOT PLAY FILES IN USB FLASH DRIVE
Yes
PN-Y325/Y425/Y475/Y555 HARDWARE DESCRIPTIONS
9 - 1
CHAPTER 9. HARDWARE DESCRIPTIONS
1. OVERVIEW
1-1. SYSTEM COMPONENT
This monitor consists of LCD module, Main PWB, Speed relay PWB, T-CON PWB, LED/KEY PWB, Power PWB and LED Driver PWB.
1-2. LCD UNIT
No
Items
PN-Y325
PN-Y425
PN-Y475
PN-Y555
1 LCD
32”
Class
Wide
LCD（AUO） 42”
Class
Wide
LCD（LG） 47”
Class
Wide
LCD（LG） 55”
Class
Wide
LCD（LG）
2
Display size
32 inch (80.1cm diagonal)
42 inch (106.7cm diagonal)
47 inch (119.3cm diagonal)
55 inch (138.8cm diagonal)
3
Max resolution
1920 x 1080
4
Max colors
1677 million color
10.6 billion color
5
Pixel
pitch
0.364 0.485 0.542 0.630
6 Max
brightness
350cd/㎡ 450cd/㎡
7 Contrast
ratio
3000：1 1500：1
8
Viewing angle
Up, down, left and right 178°
9
Display screen size
698.4 X 392.9 mm
930.2 X 523.3mm
1039.7 X 584.8mm
1209.6 X 680.4mm
10
Panel response speed
8ms
12ms
11 Backlight
Edge
LED
12
Backlight life
50,000(landscape, horizontal installation)
13 Screen
uniformity
70%
1-3. Main PWB
Main PWB controls the audio and video input/output.
The menu for the monitor and the set value of PICTURE in process mode is stored to IC3804. (Refer to the “4. PARTS LAYOUT“ for
location.)
1-4. Temperature sensor
Temperature sensor is mounted to U4251 on Main PWB. (Refer to the “4. PARTS LAYOUT“ for location.)
Backlight brightness is decreased once abnormal temperature is detected.
In addition, the monitor enters standby state once the temperature is further increased.
*The power lamp blinks in red and green alternately once the abnormal temperature is detected.
PN-Y325/Y425/Y475/Y555 HARDWARE DESCRIPTIONS
9 - 2
2. PINS TABLE
■POWER PWB
CN9902 Power input
Pin No.
Symbol
Function
1 AC
Line
AC input
2 AC
Neutral
CN902 LED Driver power supply/control signal
Pin No.
Symbol
Function
1 ON/OFF
Backlight
control
2 DIM
Dimming
signal
3 N.C
4 +12V
None
5 GND
Power GND
6 GND
7 GND
8 GND
9 +24V
LED Driver PWB power
10 +24V
11 +24V
12 +24V
■Main PWB internal connectors
CN405 T-CON/Audio power
Pin No.
Symbol
Function
1 12V
T-CON power supply 12V
2 12V
3 12V
4 NC
NC
5 24V
Audio power supply 24V
6 24V
7 24V
8 GND
GND
9 GND
10 GND
11 GND
12 GND
CN700 Main PWB power supply/control signal
Pin No.
Symbol
Function
1 ON/OFF
Backlight
ON/OFF
2 DIM
Dimming
signal
3 N.C
4 +12V
T-CON power supply 12V
5 +12V
6 GND
Power GNG
7 GND
8 GND
9 +24V
Audio power supply 24V
10 +24V
11 N.C
12 PS-ON
12V/24V
control
13 +5.2V
Main power supply 5V
14 +5.2V
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