DOWNLOAD Sharp PN-G655RE (serv.man3) Service Manual ↓ Size: 8.27 MB | Pages: 86 in PDF or view online for FREE

Model
PN-G655RE (serv.man3)
Pages
86
Size
8.27 MB
Type
PDF
Document
Service Manual
Brand
Device
Monitor / Complete
File
pn-g655re-sm3.pdf
Date
PREV: Sharp PN-G655RE (serv.man2) Handy Guide

Sharp PN-G655RE (serv.man3) Service Manual ▷ View online

PN-G655RE
BLOCK DIAGRAM
4 – 4
CN502
CN601
LCD POWER SUPPLY
CN603 REMOTE 
CONTROLLER/
LED CONTROL
CN611 AUDIO 
CONTROL
CN604 LCD 
DRIVE
CN701
SERIAL CONTROL
CN607
FOR TEMPERATURE
SENSOR 1 AND 2
CN609
FOR TEMPERATURE 
SENSOR 3
CN610
FOR OPTICAL SENSOR
15
GND
GND
16
HPDETECT
17
TX0 
−
TMDS data 
18
TX0 
+
19
GND
20
TX5 
−
Not used
21
TX5 
+
22
GND
GND
23
TXC 
+
TMDS clock 
24
TXC 
−
Pin No.
Symbol
Function
1
---
2
---
Pin No.
Symbol
Function
1
VCC
 12V power
2
3
4
5
6
GND
GND
7
8
9
10
11
NC
NC
12
13
14
15
16
17
18
19
20
Pin No.
Symbol
Function
1
---
LED control
2
---
3
---
SW input
4
---
5
---
GND
6
---
Remote control 
sensor signal
7
---
3.3V power
Pin 
No.
Symbol
Function
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
GND
GND
2
AIN0 
−
A port LVDS data 
signal
3
AIN0 
+
4
AIN1 
−
5
AIN1 
+
6
AIN2 
−
7
AIN2 
+
8
GND
GND
9
ACK 
−
A port clock signal
10
ACK 
+
11
AIN3 
−
A port LVDS data 
signal
12
AIN3 
+
13
NC
GND
14
NC
15
GND
16
BIN0 
−
B port LVDS data 
signal
17
BIN0 
+
18
BIN1 
−
19
BIN1 
+
20
BIN2 
−
21
BIN2 
+
22
GND
GND
23
BCK 
−
B port clock signal
24
BCK 
+
25
BIN3 
−
B port LVDS data 
signal
26
BIN3 
+
27
NC
GND
28
NC
29
GND
30
SELLVDS
Data mapping
31
R/L
Horizontal reverse 
display
32
U/D
Vertical reverse 
display
33
VBRT
B r i g h t n e s s   a d j u s t -
ment
34
Frame 1
Frame frequency 
switch
35
Reserved
NC
36
TEMP3
Panel surface data 
37
TEMP2
38
TEMP1
39
VON
Inverter control
40
Osset
O/S switch
Pin 
No.
Symbol
Function
A1
---
A2
---
RxD
A3
---
TxD
A4
---
A5
---
A6
---
A7
---
A8
---
A9
---
B1
---
B2
---
RxD
B3
---
TxD
B4
---
B5
---
B6
---
B7
---
B8
---
B9
---
Pin No.
Symbol
Function
1
---
5V power
2
---
Temperature sensor
3
---
4
---
NC
Pin No.
Symbol
Function
1
---
5V power
2
---
Temperature sensor
3
---
4
---
GND
5
---
NC
Pin No.
Symbol
Function
1
---
Power
2
---
3
---
GND
Pin No.
Symbol
Function
PN-G655RE
BLOCK DIAGRAM
4 – 5
CN801
I/F POWER 
(POWER COMTROL)
CN901
I/F POWER (5V INPUT)
CN902
I/F POWER (12V INPUT)
[I/F PWB 2]
CN1
SOUND SIGNAL
CN2
PC SOUND SIGNAL
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 ] 
(CN1)
Pin 
No.
Symbol
Function
1
STB5V
5V output
2
3
GND
GND
4
5
REMO1
Relay control
6
REMO2
5, 12, 19V control
7
REMO3
24V control
Pin No.
Symbol
Function
1
5V
Power for I/F
2
3
GND
4
Pin 
No.
Symbol
Function
1
12V
Power for I/F
2
3
GND
4
Pin 
No.
Symbol
Function
---
b1
Sound output
---
b2
---
b3
Sound input
---
b4
---
a1
GND
---
a2
---
a3
---
a4
Pin No.
Symbol
Function
1
---
GND
2
---
Sound input
3
---
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
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
3.3V 3.3V 
power
2
IR Remote 
control 
sensor signal
3
GND 
4
KEY1
SW input
5
KEY0
6
NC
7
GREEN
LED control
8
RED
9
NC
10
NC
11
NC
12
NC
PN-G655RE
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 key PWB and the related parts for any abnormality. 
   Check the connection cable.  
   Check the key PWB.
Check the key PWB and the related parts for any abnormality. 
   Check the connection cable. 
   Check the key 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-G655RE
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?
Does the sub power PWB supply 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.
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