Toshiba 22LV506 Service Manual page 46

1. ADJUSTMENT PROCEDURE
Read and perform these adjustments when repairing the
circuits or replacing electrical parts or PCB assemblies.
CAUTION
• Use an isolation transformer when performing any
service on this chassis.
• When removing a PCB or related component, after
unfastening or changing a wire, be sure to put the wire
back in its original position.
• When you exchange IC and Transistor with a heat sink,
apply silicon grease on the contact section of the heat
sink. Before applying new silicon grease, remove all the
old silicon grease. (Old grease may cause damages to
the IC and Transistor).
Prepare the following measurement tools for electrical
adjustments.
1. Pattern Generator
On-Screen Display Adjustment
1. Set the VOLUME to minimum.
2. Press the VOL. DOWN button on the set and the
channel button (9) on the remote control for more than
2 seconds to display adjustment mode on the screen as
shown in Fig. 1-1.
Function
03 R DRIVE (N)
3. Use the CH. UP/DOWN button or Channel button (0-9)
on the remote control to select the options shown in
Fig. 1-2.
4. Press the MENU SETUP button on the remote control to
end the adjustments.
5. To display the adjustment screen for TV, AV, GAME,
COMPONENT, HDMI, PC and DVD mode, press the
INPUT ZOOM button on the remote control.
6. Receive the DIGITAL broadcasting.
7. To display the adjustment screen for DTV mode, select
the digital channel.
8. Press the VOL.DOWN button on the set and the channel
(9) on the remote control for more than 2 seconds.
ELECTRICAL ADJUSTMENTS
TV
FULL
480i
Step No.
14
Fig. 1-1
D-1
NO. FUNCTION
03 R DRIVE(N)
04 R CUT OFF(N)
05 G DRIVE(N)
06 G CUT OFF(N)
07 B DRIVE(N)
08 B CUT OFF(N)
09 R DRIVE(C)
10 R CUT OFF(C)
11 G DRIVE(C)
12 G CUT OFF(C)
13 B DRIVE(C)
14 B CUT OFF(C)
15 R DRIVE(W)
16 R CUT OFF(W)
17 G DRIVE(W)
18 G CUT OFF(W)
19 B DRIVE(W)
20 B CUT OFF(W)
29 BAK LIGHT CENT
30 BAK LIGHT MAX
2. BASIC ADJUSTMENTS
2-1: WHITE BALANCE
1. Place the set in Aging Test for more than 15 minutes.
2. Receive the gray scale pattern from the Pattern
Generator.
3. Press the INPUT ZOOM button on the remote control
to set to the AV mode.
4. Using the remote control, set the brightness and
contrast to normal position.
5. Activate the adjustment mode display of Fig. 1-2 and
press the channel button (03) on the remote control to
select "R DRIVE(N)".
6. Press the CH. UP/DOWN button on the remote control
to select the "R DRIVE (N)", "R CUT OFF (N)",
"B DRIVE (N)", "B CUT OFF (N)", "R DRIVE (C)",
"R CUT OFF (C)", "B DRIVE (C)", "B CUT OFF (C)",
"R DRIVE (W)","R CUT OFF (W), "B DRIVE (W)" or
"B CUTOFF(W)".
7. Adjust the LEFT/RIGHT button on the remote control
to whiten the R DRIVE (N), R CUT OFF (N),
B DRIVE (N), B CUT OFF (N), R DRIVE (C),
R CUT OFF (C), B DRIVE (C), B CUT OFF (C),
R DRIVE (W) ,R CUT OFF (W), B DRIVE (W) and
B CUTOFF(W) at each step tone sections equally.
8. Perform the above adjustments 6 and 7 until the white
color is achieved.
NO. FUNCTION
31 BAK LIGHT MIN
32 BRIGHTNESS CENT
33 BRIGHTNESS MAX
34 BRIGHTNESS MIN
35 TINT
36 SHARP H1 MAX
37 SHARP H1 MIN
38 SHARP H2 MAX
39 SHARP H2 MIN
40 SHARP V1 MAX
41 SHARP V1 MIN
42 CONTRAST CENTER
43 CONTRAST MAX
44 CONTRAST MIN
45 COLOR CENTER
46 COLOR MAX
47 COLOR MIN
50 CONTRAST 40
Fig. 1-2