Service manual

ELECTRICAL ADJUSTMENTS
1. ADJUSTMENT PROCEDURE
NO. FUNCTION NO. FUNCTION
Read and perform these adjustments when repairing the 03 R DRIVE(N) 34 BRIGHTNESS MIN
circuits or replacing electrical parts or PCB assemblies. 04 R CUTOFF(N) 35 TINT
05 G DRIVE(N) 36 SHARP H1 MAX
CAUTION
06 G CUTOFF
(
N
)
37 SHARP H1 MIN
• Use an isolation transformer when performing any 07 B DRIVE(N) 38 SHARP H2 MAX
service on this chassis. 08 B CUTOFF(N) 39 SHARP H2 MIN
• When removing a PCB or related component, after 09 R DRIVE(C) 40 SHARP H3 MAX
unfastening or changing a wire, be sure to put the wire 10 R CUTOFF(C) 41 SHARP H3 MIN
back in its original position. 11 G DRIVE(C) 42 SHARP H4 MAX
• When you exchange IC and Transistor with a heat sink, 12 G CUTOFF(C) 43 SHARP H4 MIN
a
pp
l
y
silicon
g
rease
(
YG6260M
)
on the contact section of
13 B DRIVE
(
C
)
44 SHARP H5 MA
X
the heat sink. Before applying new silicon grease, remove 14 B CUTOFF(C) 45 SHARP H5 MIN
all the old silicon
g
rease.
(
Old
g
rease ma
y
cause dama
g
e 15 R DRIVE(W) 46 SHARP V1 MAX
to the IC and Transistor). 16 R CUTOFF(W) 47 SHARP V1 MIN
17 G DRIVE(W) 48 SHARP V2 MAX
Pre
p
are the followin
g
measurement tools for electrical
18 G CUTOFF
(
W
)
49 SHARP V2 MIN
ad
j
ustments.
19 B DRIVE
(
W
)
50 CONTRAST CENTER
20 B CUTOFF(W) 51 CONTRAST MAX
1. Pattern Generator 29 BAK LIGHT CENT 52 CONTRAST MIN
30 BAK LIGHT MAX 53 COLOR CENTER
On-Screen Dis
p
la
y
Ad
j
ustment
31 BAK LIGHT MIN 54 COLOR MA
X
1. Set the VOLUME to minimum. 32 BRIGHTNESS CENT 55 COLOR MIN
2. Press the VOL. DOWN button on the set and the 33 BRIGHTNESS MAX 58 CONTRAST 40
channel button
(
9
)
on the remote control for more than
2 seconds to display adjustment mode on the screen as
shown in Fi
g
. 1-1.
2. BASIC ADJUSTMENTS
2-1: WHITE BALANCE
Fig. 1-2
1. Place the set in Aging Test for more than 30 minutes.
TV 2. Receive the gray scale pattern from the Pattern
FULL 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
Function 03 R DRIVE(N) 15 Step No. to normal position.
5.
Activate the ad
j
ustment mode dis
p
la
y
of Fi
g
. 1-1 and
p
ress 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)", "G DRIVE (N)",
3.
Use the CH UP/DOWN button or Channel button
(
0-9
)
G CUTOFF
(
N
)
, "B DRIVE
(
N
)
", "B CUTOFF
(
N
)
",
on the remote control to select the options shown in R DRIVE (C), "R CUTOFF (C)", "G DRIVE (C)",
Fi
g
. 1-2.
G CUTOFF
(
C
)
, "B DRIVE
(
C
)
", "B CUTOFF
(
C
)
",
4. Press the MENU button on the remote control to end R DRIVE (W), "R CUTOFF (W)", "G DRIVE (W)",
the adjustments. G CUTOFF (W), "B DRIVE (W)" or "B CUTOFF (W)".
5. To display the adjustment screen for TV, AV,COMPONENT 7. Adjust the LEF/RIGHT button on the remote control to
HDMI and PC mode, press the INPUT SELECT button on whiten the R CUTOFF (N), G DRIVE (N),
the remote control. G CUTOFF (N), B DRIVE (N), B CUTOFF (N),
6. Receive the DIGITAL broadcasting. R DRIVE (C), R CUTOFF (C), G DRIVE (C),
7. To display the adjustment screen fo DTV mode, select G CUTOFF (C), B DRIVE (C), B CUTOFF (C),
the digital channel. R DRIVE (W), R CUTOFF (W), G DRIVE (W),
8. Press the VOL.DOWN buttom on the set and the channel G CUTOFF (W), B DRIVE (W) and B CUTOFF (W)
(9) on the remote control for more than 2 seconds. at each step tone sections equally.
8. Perform the above adjustments 6 and 7 until the white
color is achieved.
Fig. 1-1
D-1