Toshiba 19DV616DG Service Manual page 56

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. 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.
PAL
01 OSD H POSI
Function
3. Use the 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 TUNER, AV,
COMPONENT, HDMI, PC and DVD mode, press the
INPUT button on the remote control.
6. Receive the DIGITAL broadcasting.
7. To display the adjustment screen fo DTV mode, select
the ATV/DTV button on the remote control.
8. Press the VOL.DOWN button on the set and the channel
(9) on the remote control for more than 2 seconds.
ELECTRICAL ADJUSTMENTS
TUNER
16:9
34
Step No.
Fig. 1-1
NO. FUNCTION
01 OSD H POSI
02 OSD V POSI
03 R DRIVE(N)
04 R CUTOFF(N)
05 G DRIVE(N)
06 G CUTOFF(N)
07 B DRIVE(N)
08 B CUTOFF(N)
09 R DRIVE(C)
10 R CUTOFF(C)
11 G DRIVE(C)
12 G CUTOFF(C)
13 B DRIVE(C)
14 B CUTOFF(C)
15 R DRIVE(W)
16 R CUTOFF(W)
17 G DRIVE(W)
18 G CUTOFF(W)
19 B DRIVE(W)
20 B CUTOFF(W)
21 H POSI
22 H POSI MAX
23 H POSI MIN
2. BASIC ADJUSTMENTS
2-1: WHITE BALANCE
1. Place the set in Aging Test for more than 30 minutes.
2. Receive the gray scale pattern from the Pattern
Generator.
3. Press the INPUT 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. 1-1 and
press the channel button (03) on the remote control to
select "R DRIVE(N)".
6. Press the UP/DOWN button on the remote control to
select the "R CUTOFF(N)", "B DRIVE(N)",
"B CUTOFF(N)", "R DRIVE(C)", "R CUTOFF(C)",
"B DRIVE(C)", "B CUTOFF(C)", "R DRIVE(W)",
"R CUTOFF(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 CUTOFF(N)", "B DRIVE(N)"
"B CUTOFF(N)", "R DRIVE(C)", "R CUTOFF(C)",
"B DRIVE(C)", "B CUTOFF(C)", "R DRIVE(W)",
"R CUTOFF(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
achieved.
D-3 D-3
NO. FUNCTION
24 V POSI
25 V POSI MAX
26 V POSI MIN
27 BACKLIGHT CENTER
28 BACKLIGHT MAX
29 BACKLIGHT MIN
30 BRIGHT CENTER
31 BRIGHT MAX
32 BRIGHT MIN
33 TINT CENTER
34 CONTRAST CENTER
35 CONTRAST MAX
36 CONTRAST MIN
37 CONTRAST 40
38 COLOR CENTER
39 COLOR MAX
40 COLOR MIN
41 TEXT H POSI
42 TEXT V POSI
43 FLICKER ADJ
Fig. 1-2
22DV616DG 22DV616DG