Electrical Adjustments - Toshiba 15DLV77B Service Manual

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. Patterm 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
01 H POSI OSD 175
3.
Use the Channel 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 button on the remote control to end
the adjustments.
5. To display the adjustment screen for ANT,
VIDEO1,VIDEO2, COLOR STREAM HD, DVD mode,
press the INPUT button on the remote control.
To display the adjustment screen for GAME mode,
press the GAME button the remoe control.
To display the adjustment screen for DVD mode, press
the TV/DVD button the remoe control.
Press the VOL.DOWN button on the set and the
channel (9) on the remote control for more than 2
seconds.

ELECTRICAL ADJUSTMENTS

ANT
NATURAL
Step No.
Fig. 1-1
NO. FUNCTION
01 H POSI OSD
02 V POSI OSD
03 R DRIVE(N)
04 R CUT OFF(N)
05 G DRIVE(N)
06 G CUT OFF(N)
B DRIVE(N)
07
B CUT OFF(N)
08
R DRIVE(C)
09
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)
21 H POSI 60Hz
V POSI 60Hz
22
2. BASIC ADJUSTMENTS
2-1: CONTRAST MAX
1. Receive the monoscope pattern. (RF Input)
2. Using the remote control, set the brightness and contrast
to normal position.
3. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (34) on the remote control to
select "CONTRAST MAX".
4. Press the LEFT/RIGTH button on the remote control until
the contrast step No. becomes "150"
5. Receive a broadcast and check if the picture is normal.
6. Press the INPUT button on the remote control to set to
the AV mode.
7. Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 1-1 and
8.
press the channel button (34) on the remote control to
select "CONTRAST MAX".
9. Press the LEFT/RIGTH button on the remote control until
the contrast step No. becomes "150"
10. Receive a broadcast and check if the picture is normal.
11. Playback the DVD(480i) disc. (COMPONENT input)
12. Press the INPUT button on the remote control to set to
the COLOR STREAM HD mode.
13. Using the remote control, set the brightness and contrast
to normal position.
14. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (34) on the remote control to
select "CONTRAST MAX".
15. Press the LEFT/RIGTH button on the remote control until
the contrast step No. becomes "124"
16. Playback the DVD(480p) disc. (COMPONENT intput)
17. Press the TV/DVD button on the remote control to set to
the DVD mode.Then perform the above adjustments
13~15.
D-1
NO. FUNCTION
23 BAK LIGHT CENT
24 BAK LIGHT MAX
25 BAK LIGHT MIN
26 BRIGHT CENT
27 BRIGHT MAX
28 BRIGHT MIN
29 TINT
30 SHARP CENT
31 SHARP MAX
32 SHARP MIN
33 CONTRAST CENT
34 CONTRAST MAX
35 CONTRAST MIN
36 COLOR CENT
37 COLOR MAX
38 COLOR MIN
Fig. 1-2