Electrical Adjustments - Sanyo DP26670 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 (YG6260M) 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.
03 R DRIVE(N)
Function
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 SETUP/TV MENU button on the remote control
to end the adjustments.
5. To display the adjustment screen for TV, AV,
COMPONENT, HDMI, PC and DVD mode, press the
INPUT SELECT 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
11
Step No.
Fig. 1-1
D-1 D-1
NO. FUNCTION
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)
29 BAK LIGHT CENT
30 BAK LIGHT MAX
31 BAK LIGHT MIN
32 BRIGHTNESS CENT 58 CONTRAST 40
33 BRIGHTNESS MAX
34 BRIGHTNESS MIN 34 BRIGHTNESS MIN
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 SELECT 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 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
color is achieved.
NO. FUNCTION
35 TINT
36 SHARP H1 MAX
37 SHARP H1 MIN
38 SHARP H2 MAX
39 SHARP H2 MIN
40 SHARP H3 MAX
41 SHARP H3 MIN
42 SHARP H4 MAX
43 SHARP H4 MIN
44 SHARP H5 MAX
45 SHARP H5 MIN
46 SHARP V1 MAX
47 SHARP V1 MIN
48 SHARP V2 MAX
49 SHARP V2 MIN
50 CONTRAST CENTER
51 CONTRAST MAX
52 CONTRAST MIN
53 COLOR CENTER
54 COLOR MAX
55 COLOR MIN
Fig. 1-2