DOWNLOAD Sharp PN-525E (serv.man3) Service Manual ↓ Size: 7.57 MB | Pages: 80 in PDF or view online for FREE

Model
PN-525E (serv.man3)
Pages
80
Size
7.57 MB
Type
PDF
Document
Service Manual
Brand
Device
Monitor
File
pn-525e-sm3.pdf
Date
PREV: Sharp PN-525E (serv.man2) Handy Guide

Sharp PN-525E (serv.man3) Service Manual ▷ View online

PN-525E
BLOCK DIAGRAM
4 – 5
CN3
AUDIO CONTROL
CN4
SPEAKER OUTPUT
[TEMPERATURE SENSOR PWB 1]
CN301
CN303
[TEMPERATURE SENSOR PWB 2]
CN202
[TEMPERATURE SENSOR PWB 3]
CN304
[OPTICAL SENSOR PWB ] 
CN401
[SW PWB ] 
CN501
Pin No.
Symbol
Function
1
---
9V power
2
---
Audio amplifier control
3
---
Audio amplifier error
4
---
Sound processor 
control
5
---
6
---
GND
7
---
8
---
Sound processor 
control
9
---
2.5V power
10
---
GND
11
---
3.3V power
12
---
GND
13
---
5V power
14
---
9.5V power
15
---
9.5V power
Pin No.
Symbol
Function
1
OUT  L 
+
Speaker output
2
OUT  L 
−
3
OUT R 
+
4
OUT R 
−
Pin No.
Symbol
Function
1
+
 5V
5V power
2
SCL
Temperature sensor
3
SDA
4
GND
GND
Pin No.
Symbol
Function
1
---
5V power
2
---
Temperature sensor
3
---
4
---
GND
5
---
NC
6
---
Pin No.
Symbol
Function
1
+
 5V
5V power
2
SCL
Temperature sensor
3
SDA
4
GND
GND
5
NC
NC
Pin No.
Symbol
Function
1
+
 5V
5V power
2
SCL
Temperature sensor
3
SDA
4
GND
GND
Pin No.
Symbol
Function
1
---
Power
2
---
3
---
GND
Pin No.
Symbol
Function
1
---
LED control
2
---
3
---
SW input
4
---
5
---
GND 
6
---
Remote control 
sensor signal
7
---
3.3V power
PN-525E
TROUBLESHOOTING
5 – 1
CHAPTER 5. TROUBLESHOOTING
3. The display doesn't show/ Display abnormality
Check the adjustment and setting for any abnormality.
Readjust and reset with the menu.
Is input selection set to signal input?
Adjust the input source properly.
Digital connection only
    Is the graphic board resolution proper?
Replace the graphic board. 
Check the video input signal for any abnormality. 
    Check the video cable. 
    Check that the video signal is not a special one (out of support).
Replace the abnormal part.
Is the menu displayed under the signal input state?
Replace the abnormal part. 
Replace the abnormal part.
2. The remote control does not work. 
Is the battery power alive?
No
Replace the battery.
Replace the abnormal part.
Replace the abnormal part.
1. The power is not supplied (The LED does not light up)
Is the AC cord properly inserted?
No
Insert the AC cord properly.
Is the power SW turned ON?
Is the power SW free from any abnormality?
No
No
Replace the abnormal part.
Yes
Yes
No
Replace the abnormal part.
Replace the abnormal part.
No abnormality 
Replace the abnormal part.
Yes
Yes
No abnormality
No abnormality
Yes
Yes
Yes
No abnormality
Abnormality
Abnormality
Abnormality
Abnormality
Abnormality
Abnormality
Abnormality
Abnormality
No
No
Yes
No
Does the main power PWB supply power voltages of STB5V/ 
5V/ 12V/ 24V?
Does the sub power source supply 24V?
Note: If the signal input is not supplied, the power save 
function is operated to interrupt the output of 5/12/ 
24V from the sub power source. 
Check the power PWB and related sections for any 
abnormality. 
   Check the fuse for breakage. 
   Check the main power PWB. 
   Check the switch cable.  
   Check the filter block.
   Check the AC power cord.
Check the I/F PWB 1 and the related parts for any abnormality. 
   Check the power cable.  
   Check the fuse for breakage.  
   Check the I/F PWB 1.
Check the switch PWB and the related parts for any abnormality. 
   Check the connection cable.  
   Check the switch PWB.
Check the switch PWB and the related parts for any abnormality. 
   Check the connection cable. 
   Check the switch PWB .
Check the I/F PWB 1 and the related parts for any abnormality. 
   Check the connection cable.  
   Check the fuse for breakage.  
   Check the PWB.
Check the I/F PWB 1 and the related parts.
    Check the connection cable.  
    Check the fuse for breakage. 
    Check the PWB.
Check the LCD module and the related parts for any abnormality.
     Check the connection cable.  
     Check the LCD control PWB.
Check the I/F PWB 1 and the related parts for any abnormality. 
    Check the connection cable.  
    Check the fuse for breakage.  
    Check the PWB.
PN-525E
TROUBLESHOOTING
5 – 2
4. The backlight does not light up.
Yes
Refer to "3. The display doesn't show / Display abnormality".
Does the main power PWB supply STB5V/ 5V/ 12V/ 24V?
Refer to "1. The power is not supplied".
Replace the abnormal part.
Replace the abnormal part. 
5. Sound is not reproduced/ Reproduced sound abnormality
Is the sound volume is set to the minimum or mute?
Readjust and reset. 
Replace the abnormal part. 
Replace the abnormal part.
Replace the abnormal part.
Repla ce the abnormal part.
Replace the abnormal part.
6. Daisy chain is not made / Display abnormality
Is input selection set to  signal input?
Readjust and reset with the menu.
Replace the abnormal part.
Replace the abnormal part.
Yes
No
Yes
No abnormality
No abnormality
No abnormality
No abnormality
No abnormality
No abnormality 
No abnormality 
No
Abnormality
Abnormality
Abnormality
Is input selection set to audio signal input?
Adjust the input source properly.
Yes
No
Abnormality
Abnormality
Abnormality
Abnormality
Abnormality
Abnormality
Abnormality
Abnormality
Check the inverter and the related parts for any abnormality. 
Check the LCD inverter PWB. 
Check the connection cable.
   Check the CCFT lamp.
Check the I/F PWB 1 for any abnormality. 
Check the connection cable.  
Check the fuse for breakage.  
Check the I/F PWB.
Check the audio input signal for any abnormality. 
Check the cable connection. 
Check the audio cable. 
Check the audio output cable for any abnormality. 
Check the cable connection. 
Check the audio cable. 
Check the external speaker and the related parts for any abnormality. 
Check the speaker cable. 
Check the speaker.  
Check the speaker impedance.
Check the I/F PWB 2 and the related parts for any abnormality. 
Check the connection cable.  
Check the fuse for breakage.  
Check the PWB.
Check the I/F PWB 1 and the related parts for any abnormality. 
Check the connection cable.  
Check the fuse for breakage.  
Check the PWB.
Check the DVI cable for any abnormality. 
Check the DVI cable connection.
Check the I/F PWB 1 and the related parts for any abnormality. 
Check the connection cable.  
Check the fuse for breakage.  
Check the PWB.
When the power is turned on, the backlight lights up for several 
seconds.
PN-525E
TROUBLESHOOTING
5 – 3
7. HARDWARE CHECK NG
6
8
1
2
4
3
5
7
Major sympton when NG
LED flashing pattern
Countermeasures
1 LCD 12V
The backlight does not light up.
The red LED blinks.
Refer to 7-1.
2 VIDEO 5V
Abnormal colors on the display.
3 AMP 3.3V
Sound is not reproduced.
4 AMP 9V
5 BACKLIGHT
The backlight does not light up.
6 THERMAL1
Automatic power OFF.
red 
3 green 3 red 3 green 3 ...
Refer to 7-2.
7 THERMAL2
8 THERMAL3
7-1. The red LED blinks
Abnormality
No abnormality
Replace the abnormal part.
Replace the abnormal part.
No NG
Abnormality
Abnormality
NG
Is there any abnormality in the NG position? 
Check the power for abnormality
. 
 
Check the fuse for breakage. 
Check the cable connection.  
 
 
Check the switch and the related parts for any abnormality. 
Check the connection cable.  
Check the switch PWB.
Check the I/F PWB 1 for any abnormality. 
Check the connection cable.  
Check the fuse for breakage.  
Check the PWB.
To locate the abnormal position, perform a certain 
operation or use a certain RS232C command to display 
the diagnosis result.
7-2. The LED lights up in order of red 
3 green 3 red 3 green.
Abnormality
No abnormality
Replace the abnormal part.
Replace the abnormal part.
Replace the abnormal part.
No NG
Abnormality
Abnormality
NG
Is there any abnormality in the NG position?
Is the unit properly installed? 
Check the switch and the related parts for any abnormality. 
Check the connection cable.  
Check the switch PWB.
Check the I/F PWB 1 for any abnormality. 
Check the connection cable.  
Check the fuse for breakage.  
Check the PWB.
To locate the abnormal position, perform a certain 
operation or use a certain RS232C command to display 
the diagnosis result.
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