Sharp PN-L603A (serv.man3) Service Manual ▷ View online
PN-L703A/L703B, PN-70TA3/70TB3, PN-L603A/L603B, PN-60TA3/60TB3
SERVICE MENU/VARIOUS SETTING TOOL OPERATING PROCEDURES 4- 39
20. TEST PATTERN TOOL
This tool is used to display the test pattern to check that the parts and the LCD module are securely connected after replacement, removal
or disassembly of the I/F PWB, the C-PWB, the LVDS cable, and the LCD module.
20-1. OPERATING CONDITIONS OF THE USER
SETTING VALUE TOOL
The operating conditions of the Gamma setting read tool of the
information display are as follows.
OS
(32bit Only)
- Windows 8
- Windows Vista
- Windows 7
Communication
port
- LAN LAN(100 BASE-TX / 10BASE-TX)
■ When connected to the information display
with a LAN cable
Refer to the followings of [7. INSTRUCTIONS FOR LAUNCHER
TOOL] to connect the information display and the PC.
■ Connected to the information display with a LAN cable
■ How to prepare the network settings
■ How to set PC automatically with using DHCP
■ How to set PC manually without using DHCP
■ How to set Information Display with using DHCP
■ How to set Information Display without using DHCP
■ How to confirm the connection of PC and Information display
20-2. BOOTING PROCEDURES OF THE TEST
PATTERN TOOL
Press [Test Pattern] button of the service tool launcher, and the
following message is displayed.
For connection of the jig, refer to the following.
Refer to page 4 - 35 "18. FLICKER ADJUSTMENT TOOL".
20-3. TEST PATTERN METHOD
GUI OF THE TEST PATTERN TOOL
The test procedures by use of the test pattern tool are as follows:
1 ) Press [Connection Setting] button and perform the
communication setting.
2 ) When [UP] or [DOWN] button is pressed, the pattern is
changed in the sequence shown below.
3 )
<A model>
When [EXIT] button is pressed with “Up white, Down black” or “Up
black, Down white” being displayed. By holding [Power], the
monitor moves to the power waiting mode. Then, by turning ON
and OFF the main power, terminate the display of the pattern.
<B model>
When [EXIT] button is pressed, the tool is terminated. To cancel
the display pattern, turn OFF the main power.
*1 With only the B model, the holding [POWER] button function is
effective.
Gradaton holixzmtal
Green
Blue
Red
All black
Gradation vertical
50%Gray
100%Gray
Red
Blue
Green
Up black, Down white
Up white, Down black
Gradation horizontal
*1
Gradation vertica
*1
l
All black
All black
100%Gray
50%Gray
TEST PATTERN
TRANSITION WHEN
[UP] IS PRESSED
TRANSITION WHEN
[UP] IS PRESSED
TEST PATTERN
TRANSITION WHEN
[DOWN] IS PRESSED
TRANSITION WHEN
[DOWN] IS PRESSED
PATTERN
TRANSITION
(UP SEQUENCE)
TRANSITION
(UP SEQUENCE)
PATTERN
TRANSITION
(DOWN SEQUENCE)
TRANSITION
(DOWN SEQUENCE)
Up white, Down black
*1
Up black, Down white
*1
PN-L703A/L703B, PN-70TA3/70TB3, PN-L603A/L603B, PN-60TA3/60TB3
SERVICE MENU/VARIOUS SETTING TOOL OPERATING PROCEDURES 4- 40
21. FLICKER ADJUSTMENT TOOL
■
Outline
The LCD flicker adjustment is performed after replacing the C-PWB and the LCD module.
■
Instrument
-
PC for adjustment
The PC needs to have LAN port :100BASE TX/10BASE TX.
-
Screwdriver
Used for opening/closing of rear cabinet.
■
Flow chart
PN-L703A/B : (1)→60
(2)→BB
PN-L603A/B : (1)→70
(2)→BB
(2)→BB
PN-L603A/B : (1)→70
(2)→BB
Start
4 Turn on IDP.
8 Adjust with service tool.
10 Remove the LAN cable
End
Yes
No
Yes
No
2 Confirm that main power SW is off.
3 Connect the PC and IDP with LAN
cable.
9 Turn off IDP.
Turn off right away
Checking harness
connections is done?
connections is done?
Cause of inferiority is not C-PWB
OR
This C-PWB has some defects.
OR
This C-PWB has some defects.
Confirm the connection of FFC and
LVDS, and turn on again and retry
adjustment.
LVDS, and turn on again and retry
adjustment.
-Refer to "21 - 1. OPERATING
CONDITIONS FOR THE
FLICKER ADJUSTMENTTOOL".
FLICKER ADJUSTMENTTOOL".
-Refer to page "21 - 2. BOOTING
PROCEDURES OF THE
FLICKER ADJUSTMENTTOOL".
FLICKER ADJUSTMENTTOOL".
-Refer to page "121 - 3. FLICKER
ADJUSTMENT P
ROCEDURES".
T-CON PWB is not appropriate
Please use another T-CON PWB.
Please use another T-CON PWB.
No
6 To enter the service menu
Version of the ROM is not appropriate.
Please use another T-CON PWB.
Please use another T-CON PWB.
*Check the version of the ROM.
PN-L703A/L703B, PN-70TA3/70TB3, PN-L603A/L603B, PN-60TA3/60TB3
SERVICE MENU/VARIOUS SETTING TOOL OPERATING PROCEDURES 4- 41
■
Figures 1
<CONNECTION OF INSTRUMENTS AND IDP>
<CHECKING CONNECTION BETWEEN C-PWB AND FFC/LVDS>
- Connect straightly and completely.
- Connector of FFC has holding mechanism. Holding part must not be loose.
EXAMPLES OF IMPORER STATE
■
Figures 2
<CONNECTION OF INSTRUMENTS AND IDP>
1 ) Display flicker pattern with service tool.
2 ) Change the value roughly from min. to max. (with [UP] or [DOWN] button) and watch display.
3 ) Degree of flicker changes as the value change.
4 ) Search approximate value which flicker is least at center of the display (with [UP] or [DOWN] button).
5 ) In addition to above, Search value which flicker is least at the center of the display (with [UP] or [DOWN] button) in detail.
Example
FIGURE SHOWS REGION TO OBSERVE
FLICKER WITH RED CIRCLE
FLICKER WITH RED CIRCLE
DISPLAY
Observe flicker
near center.
near center.
PC
Back view of PN-R703A/B, PN-R603A/B
FFC
LVDS harness
LAN cable
AC inlet
IF-PWB
C-PWB
PN-L703A/L703B, PN-70TA3/70TB3, PN-L603A/L603B, PN-60TA3/60TB3
SERVICE MENU/VARIOUS SETTING TOOL OPERATING PROCEDURES 4- 42
■
Conditions
- Viewing distance : 0.35 +/- 0.1 [m]
- Viewing angle : 0 degree and +/- 45 – 80 degree
- Criteria : visual observation
■
Background
- The way of driving TFT-LCD panel is AC drive to prevent seize.
- For example AC drive is that voltage applied to TFT change from +B [V] to 0 [V] in time for 100% signal level. And the reference voltage
is +A [V] (=B/2).
- 0 [V] is not change among TFT-LCD panels.
- Though input voltage is +B [V], actual voltage applied to TFT is change among panels.
- If the reference voltage is fixed to +A [V], DC may generated. Because difference of voltage (A-0) is not equal to (B-A).
- Because DC may occur seize, the reference voltage should be adjusted with dedicated pattern to be center of 0[V] and +B[V].
- The reference voltage is called VCOM. VCOM is adjusted in flicker adjustment.
+B
+0
Voltage applied toTFT[V］
Time
+B
+0
-> Seize of LCD may occu
r.
waveform at
100% signal level
100% signal level
FIGURE SHOWS WAVEFORM OF SUITABLE VCOM VOLTAGE
+A(VCOM)
=B/2
+A(VCOM)
+B/2
These difference of voltage
must be the same.
must be the same.
DC is generated.
The voltage is |A-B/2|[V].
The voltage is |A-B/2|[V].
This level is changed amang
TFT - LCD panels
TFT - LCD panels
waveform at
50% signal level
50% signal level
Voltage applied toTFT[V］
FIGURE SHOWS WAVEFORM OF UNSUITABLE VCOM VOLTAGE
Time
Click on the first or last page to see other PN-L603A (serv.man3) service manuals if exist.