14R2BK
t
3.3Vdc0
1 2 3 4 51 2 3 4 5
same as beside procedure.trace line appear and make sure the colour appear whether red, green or blue.related test points as below which is based on colour appear at (2) RED = TP47R, GREEN = TP47G, BLUE = TP47B.tip of signal reach 3.3Vdc.Line 3 is one step (data) brighter than line 2
*Alternative Procedure (1) Step (1), (2), (3) and (4) are(2) Then continue adjust until re-(3) Connect the oscilloscope to(4) Then adjust Screen VR until the12
8-2
Adjustment conditions/procedureWaveform or others
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).
DRI-RS/RW/RC, DRI-GS/GW/GC, DRI-BS/BW/ BC, CUT-R and CUT-G must be INITIAL DATA.dark room.NO VIDEO signal.sistor.crease screen variable resistor until colour raster suddenly on and off (AKB start function).sistor until screen retrace line cut off. (Not Raster)Must confirm the AKB function in set before continue the next adjustment.hatch pattern with 5 black level windows)
Remark 1.Before CRT cutoff adjustment, SUB-BRIGHT,2. CRT Cutoff adjustment must be done inside a1.Switch TV to VIDEO mode,BLUE BACK OFF, with2.Press R/C to set Picture Normal condition. 3. First, off the screen by adjust screen variable re-*4. Next, checking AKB circuit function by slowly in-5. Then continue adjust until retrace line appear. 6. Finally, slowly decrease the screen variable re-Note :1.Call " SUB-BRI" in service mode. (Receive Cross-*(2) Adjust the " SUB BRIGHT " bus data in order
2C BUS2C BUS
Adjustment pointCRT CUTOFF ADJUSTMENT (ICONTROL)SUB-BRIGHT- NESS ADJUSMENT (ICONTROL)
12
CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENTNo.
!
B G RR G BAbout 100Wedge "c"
Note***
CRT neck
RGBBGR
BGRRGB6-pole magnet
Wedge "a"
Fig. 5-1Fig. 5-2Fig. 5-3Fig. 5-4
Lacquer
4-pole magnet
B G RR G B!Lacquer
About 100Wedge "b"Purity magnet
8-1
Note*** SAMSUNG CRT: 32mm CPT CRT: 35mm TOSHIBA CRT: 35mm
Adjustment conditions/procedureWaveform or others
the deflection coil upward.and swing the deflection coil downward.the deflection coil rightward.the deflection coil leftward.
gle in order to superpose the blue and red col- ours.gle in order to superpose the green colour over the blue and red colours.screen in the following steps. a)Fig. 5-1: Drive the wedge at point "a" and swingb)Fig. 5-2: Drive the wedge at points "b" and "c"c)Fig. 5-3: Drive the "c" wedge deeper and swingd)Fig. 5-4: Drive the "b" wedge deeper and swingtape over them.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.
CONVERGENCE 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-2.Turn the 6-pole magnet to a proper opening an-DYNAMIC CONVERGENCE 1.Adjust the convergence on the fringes of the2.Fix all the wedges on the CRT and apply glass3.Apply lacquer to the deflection yoke lock screw,
Adjustment pointCONVERGENCE ADJ. ( To be done after the purity adjustment.
1
No.
8 |
ACEC
