Sharp 55R-WP4H, Service Manual

Page: 32 / 120

24
61R-WP5H
55R-WP5H
ELECTRICAL ADJUSTMENT
The TV set has been factory-adjusted to optimum condition. If by any chance an adjustment point gets out of spec
or readjustment is needed after component part replacement, take the following steps.
»
Instruments required for servicing
• STB (Set Top Box)
Use model TU-DTV1000 that is already available on the market.
• HD Signal Generator (SENCORE model VP-300 or equivalent)
Used to generate 1080I, 720P, 480P crosshatch and half color bar patterns.
• NTSC Signal Generator (480I)
Used to generate monoscope, crosshatch and half color bar patterns.
Leader LMS237 stereo modulator.
»
Service Mode Functions
The following adjustments and settings can be handled with the buttons on the R/C unit.
1
Video Adjustments (Picture, Tint, Color, Brightness)
(Red/Green/Blue Cut-off, Green/Blue Drive)
2
Multi Screen Adjustments (Tint, Cont, Color)
3
Deflection/Position Adjustments (Vertical Linearity, Vertical Size, Vertical Position)
(Horizontal Size, Side Pincushion, Horizontal Position, Horizontal Display Position)
4
Panel (Bright/Width) Adjustments
1. Service mode
Before putting unit into the service mode, check that
customer adjustments are in the normal mode. Use
the reset function in the video and screen adjustment
menu to ensure customer controls are in their proper
(reset) position.
2. Service number selection
Once in the service mode, press the Ch-up or Ch-
down button on the remote controller or at the set.
The service adjustment number will vary in
increments of one, from "D01" to "C01". Select the
item you wish to adjust.
3. Data number selection
Press the Vol-up or down button to adjust the data
number.
To enter the service mode and exit service
mode.
While pressing the Select-down and Ch-up buttons at
the sametime, plug the AC cord into a wall socket.
Now the TV set is switched on and enters the service
mode.
To exit the service mode, turn the television off by
pressing the power button.
S01 D:00
SERVICE ADJUSTMENT
NUMBER
PICTURE MODE
STRETCH
DATA NUMBER
CHANNEL
02 21
D01
»
Initial factory settings
When the following services have been made, it is
necessary to make the initial factory settings.
1) When the IC3504 (Memory IC) has been replaced:
This IC stores the video-and deflection-related
data in memory. A replacement IC3504 does not
have any data written in (Adjustment 0). It is
therefore required to make the initial settings 1 and
2 on it. Take the following procedure.
1
Initial Factory Settings 1 (Initializing the IC)
2
Initial Factory Settings 2 (Making the software
menu setting data to the factory-adjustment
level)
3
Various Adjustments
2) When the channel selection IC3501 (Micro-
processor) has been replaced:
1
Initial Factory Settings 2
When the micro-processor alone has been
replaced, just make this adjustment, not any
other ones.
2
Initial factory settings 1:
Into the factory mode or service mode.
Please continue pushing the bottom of
initial Factory Settings 1 during 1 second.
3
Initial factory settings 2:
Please continue pushing the button of
initial Factory Settings 2 during 1 second.