Pacific Digital PTV3606 - Manual (Page 14)

2-1: AGC VOLTAGE
1.
2.
3.
4.
5.
Place the set with Aging Test for more than 15 minutes.
Receive the UHF (63
±
1dB).
Connect the digital voltmeter between the TP002 and
the (GND) of TU001.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (01) on the remote control to
select "RF AGC".
Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 2.10
±
0.05V.
Place the set with Aging Test for more than 15 minutes.
Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (00) on the remote control to
select "CUT OFF".
Adjust the Screen Volume until a dim raster is obtained.
2-2: CUT OFF
1.
2.
3.
4.
BEFORE MAKING ELECTRICAL
ADJUSTMENTS
Use an isolation transformer when performing any
service on this chassis.
Before removing the anode cap, discharge electricity
because it contains high voltage.
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 for a heat sink,
apply the silicon grease (YG6260M) on the contact
section of the heat sink. Befor applying new silicon
grease, remove all the old silicon grease. (Old grease
may cause damages to the IC and Transistor.)
Read and perform these adjustments when repairing the
circuits or replacing electrical parts or PCB assemblies.
1.
•
•
•
•
CAUTION
ELECTRICAL ADJUSTMENTS
2. BASIC ADJUSTMENTS
D-1
Fig. 1-1
Use the Channel UP/DOWN button or Channel button
(0-9) on the remote control to select the options shown
in Fig. 1-2.
Press the MENU button on the remote control to end
the adjustments. 2.
3.
FUNCTION
CUT OFF
RF AGC
AGC GAIN
R DRIVE
R CUT OFF
G DRIVE
G CUT OFF
B DRIVE
H POSI 50
V POSI 50
V POSI 60
V SIZE 50
V SIZE 60
VCO COASE
VCO FINE
-
-
BRIGHT CENT
BRIGHT MAX
BRIGHT MIN NO.
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
35 H. POSI OSD 128
FUNCTION
TINT
SHARP
CONT CENT
CONT MAX
CONT MIN
COLOR CENT
COLOR MAX
COLOR MIN
M R CUT OFF
M G CUT OFF
M B CUT OFF
CVBS OUT
APR THR
BELL
BANDPASS
H POSI OSD
V POSI OSD
H POSI TXT
V POSI TXT
H POSI 60 NO.
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
Fig. 1-2
Prepare the following measurement tools for electrical
adjustments.
In the condition of NO indication on the screen.
Press the VOL. DOWN button on the set and the
Channel button (9) on the remote control for more than
2 seconds to appear the adjustment mode on the
screen as shown in Fig. 1-1.
1. Oscilloscope
2. Digital Voltmeter
3. Pattern Generator
On-Screen Display Adjustment
1.
TV
2-3: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustment.
1.
2.
3.
4.
5.
6.
7.
8.
Place the set with Aging Test for more than 10 minutes.
Receive the white 100% signal from the Pattern
Generator.
Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (04) on the remote control to
select "R CUT OFF".
Using the VOL. UP/DOWN button on the remote control,
adjust the R CUT OFF.
Press the CH. UP/DOWN button on the remote control
to select the "R DRIVE", "G DRIVE", "G CUT OFF" or
"B DRIVE".
Using the VOL. UP/DOWN button on the remote control,
adjust the R DRIVE, G DRIVE, G CUT OFF or B DRIVE.
Perform the above adjustments 6 and 7 until the white
color is looked like a white.
2-4: FOCUS
1.
2.
3. Receive the monoscope pattern.
Turn the Focus Volume fully counterclockwise once.
Adjust the Focus Volume until picture is distinct.
2-5: CONSTANT VOLTAGE
1.
2.
3.
4.
5.
Place the set with Aging Test for more than 15 minutes.
Using the remote control, set the brightness and contrast
to normal position.
Connect the digital voltmeter to TP501.
Set condition is AV MODE without signal.
Adjust the VR501 until the digital voltmeter is 135
±
0.5V.
2-6: VERTICAL LINEARITY
1.
2.
3.
Receive the monoscope pattern.
Using the remote control, set the brightness and
contrast to normal position.
Adjust the VR420 until the SHIFT quantity of the OVER
SCAN on upside and downside becomes minimum.