8
8-1 8-2
14D1-S/G/W
14D2-S/G
CONVERGENCE ADJUSTMENT
No. Adjusting point Adjusting procedure/conditions Waveform and others
CONVERGENC
ADJ.
( To be done
after the purity
adjustment.
1. Receive the "Crosshatch Pattern" signal.
2. Using the remote controller, call NORMAL mode.
STATIC CONVERGENCE
1. Turn the 4-pole magnet to a proper opening an-
gle in order to superpose the blue and red col-
ours.
2. Turn the 6-pole magnet to a proper opening an-
gle in order to superpose the green colour over
the blue and red colours.
DYNAMIC CONVERGENCE
1. Adjust the convergence on the fringes of the
screen in the following steps.
a) Fig. 5-1: Drive the wedge at point "a" and swing
the deflection coil upward.
b) Fig. 5-2: Drive the wedge at points "b" and "c"
and swing the deflection coil downward.
c) Fig. 5-3: Drive the "c" wedge deeper and swing
the deflection coil rightward.
d) Fig. 5-4: Drive the "b" wedge deeper and swing
the deflection coil leftward.
2. Fix all the wedges on the CRT and apply glass
tape over them.
3. Apply lacquer to the deflection yoke lock screw,
magnet unit (purity, 4-pole, 6-pole magnets) and
magnet unit lock screw.
Finally received the Red-only and Blue-only sig-
nals to make sure there is no other colours on the
screen.
1
RGB
BGR
R
G
B
R
G
B
B
G
R
B
G
R
RGB
BGR
Lacquer
Wedge "a"
Wedge
"b"
Wedge
"c"
About
100°
About
100°
4-pole magnet
6-pole magnet
CRT neck
Note***
Lacquer
Purity magnet
Fig. 5-1
Fig. 5-2
Fig. 5-3
Fig. 5-4
Note***
SAMSUNG CRT : 32mm
CPT CRT : 35mm
TOSHIBA CRT : 35mm
CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT
No. Adjusting point Adjusting procedure/conditions Waveform and others
CRT CUTOFF
ADJUSTMENT
(I
2
C BUS
CONTROL)
Remark
1. Before CRT cutoff adjustment, SUB-BRIGHT,
DRI-RS/RW/RC, DRI-GS/GW/GC, DRI-BS/BW/
BC, CUT-R and CUT-G must be INITIAL DATA.
2. CRT Cutoff adjustment must be done inside a
dark room.
1. Switch TV to VIDEO mode,BLUE BACK OFF, with
NO VIDEO signal.
2. Press R/C to set Picture Normal condition.
3. First, off the screen by adjust screen variable re-
sistor.
*4. Next, checking AKB circuit function by slowly in-
crease screen variable resistor until colour raster
suddenly on and off (AKB start function).
5. Then continue adjust until retrace line appear.
6. Finally, slowly decrease the screen variable re-
sistor until screen retrace line cut off. (Not Raster)
Note :
Must confirm the AKB function in set before con-
tinue the next adjustment.
1
SUB-BRIGHT-
NESS
ADJUSMENT
(I
2
C BUS
CONTROL)
1. Call " SUB-BRI" in service mode. (Receive Cross-
hatch pattern with 5 black level windows)
*(2) Adjust the " SUB BRIGHT " bus data in order
that the line 1and 2 have the same darkness
wherelse line 3 is one step (data) brighter than
line 2. Finally data minus 1 to make line 1, 2,
and 3 are in same level (darkness).
2
Line 3 is one step (data)
brighter than line 2
WHITE BAL-
ANCE SERV-
ICE MODE
ADJ. (I
2
C BUS
CONTROL)
1. Receive the "WHITE" pattern with BURST signal.
2. Press R/C to set Picture NORMAL condition.
3. Connect the DC miliammeter between TP602
(-) TP603 (+).
4. Check Beam current should be around 800 µA.
5. Set it to service mode and adjust the DRI-GS, &
DRI-BS data to have a colour temperature of
12300°K or 18000°K ( white ). * Note .
6. Receive "WHITE" pattern, WITH BURST signal,
and set BRIGHTNESS Y by generator, to **10
cd/m2 (MINOLTA CA-100) by reducing
LUMINATE Y signal.
7. Adjust "CUT-R" & "CUT-G" to get desired colour
temperature #. Then go back NORMAL mode
(HIGH BRIGHT**) to check colour temperature.
If out of range, back to (1).
Note: This adjustment must be done after
warming up the unit for 30 minutes or
longer with a beam current over 500
µ
A.
* ADJUST DRI-GC/GW, DRI-BC/BW as following
DATA, after finishing DRI-BS and DRI-GS DATA
ADJUSTMENT.
DRI-RW = 32 (FIXED), DRI-RS = 32 (FIXED)
DRI-BC = "DRI-BS"
(For 12300°K And 18000°K Condition)
3
# 12300°K X : 0.272
Y : 0.275
# 18000°K X : 0.255
Y : 0.255
(MINOLTA COLOUR ANALYZER
CA-100)
*Note: Above Data can be UP/
DOWN by Volume key.
LOW HIGH
14" 10cd/m2 200cd/m2
*Alternative Procedure
(1) Step (1), (2), (3) and (4) are
same as beside procedure.
(2) Then continue adjust until re-
trace line appear and make sure
the colour appear whether red,
green or blue.
(3) Connect the oscilloscope to
related test points as below
which is based on colour appear
at (2) RED = TP47R, GREEN =
TP47G, BLUE = TP47B.
(4) Then adjust Screen VR until the
tip of signal reach 3.3Vdc.
* 12300°K DRI-GW="DRI-GS"-7
DRI-BW="DRI-BS"-7
DRI-GC="DRI-GS"-7
DRI-RC=25
* 18000°K DRI-GW="DRI-GS"-7
DRI-BW="DRI-BS"-7
DRI-GC="DRI-GS"-5
DRI-RC=27
1
2
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