Electrical Adjustments - Toshiba 50HP16 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 damage to the
IC and Transistor).
Prepare the following measurement tools for electrical
adjustments.
1. Pattern Generator
2. BASIC ADJUSTMENTS
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. 2-1.
01 H POSI OSD
3. Use the Channel UP/DOWN button or Channel button
(0-9) on the remote control to select the options shown
in Fig. 2-2.
4. Press the MENU button on the remote control to end
the adjustments.
5. To display the adjustment screen for AV, YUV, HDMI
and PC mode, press the INPUT button on the remote
control to set to the AV, YUV, HDMI and PC mode.
Press the VOL.DOWN button on the set and the
channel (9) on the remote control for more than 2
seconds.

ELECTRICAL ADJUSTMENTS

TV
AUTO
90
Fig. 2-1
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)
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)
2-1: CONTRAST CENTER
1. Receive the monoscope pattern. (VIDEO Input)
2. Press the INPUT button on the remote control to set to the
AV mode.
3. Activate the adjustment mode display of Fig. 2-1 and press
the channel button (36) on the remote control to select
"CONTRAST MAX".
4. Press the VOL UP/DOWN button on the remote control
until the contrast step No. becomes "155".
5. Check if the picture is normal.
6. Receive the monoscope pattern. (RF Input)
7. Press the INPUT button on the remote control to set to the
TV mode.
8. Activate the adjustment mode display of Fig. 2-1 and press
the channel button (36) on the remote control to select
"CONTRAST MAX".
9. Press the VOL UP/DOWN button on the remote control
until the contrast step No. becomes "145".
10. Check if the picture is normal.
11. Receive the digital broadcast. (RF Input)
12. Perform the above adjustments 3 and 5.
13. Playback the DVD(480i) disc. (COMPONENT Input)
14. Press the INPUT button on the remote control to set to the
YUV mode.
15. Activate the adjustment mode display of Fig. 2-1 and press
the channel button (36) on the remote control to select
"CONTRAST MAX".
16. Press the VOL UP/DOWN button on the remote control
until the contrast step No. becomes "162".
17. Check if the picture is normal.
18. Playback the DVD(480i) disc. (HDMI Input)
19. Press the INPUT button on the remote control to set to the
HDMI mode.
20. Activate the adjustment mode display of Fig. 2-1 and press
the channel button (36) on the remote control to select
"CONTRAST MAX".
21. Press the VOL UP/DOWN button on the remote control
until the contrast step No. becomes "130".
22. Check if the picture is normal.
D-1
NO. FUNCTION
19 B DRIVE (W)
20 B CUT OFF (W)
22 H POSI 60Hz
24 V POSI 60Hz
28 BRIGHT CENT
29 BRIGHT MAX
30 BRIGHT MIN
31 TINT
35 CONTRAST CENTER
36 CONTRAST MAX
37 CONTRAST MIN
38 COLOR CENT
39 COLOR MAX
40 COLOR MIN
Fig. 2-2