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Once Again, Very happy with the result!
A good and useful manual. With these, We was abled to isolate and pin point the component that was causing the problem. The total time spent in troubleshooting is very much reduced.
The quality of the manual is top. The transfer worked perfect and fast.
No problems at all. Recommendable
Very good service for get any documentation. Fast and perfect quality.
Excellent service manual with all the necessary info. :)
CONVERGENCE CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT
BGR ( To be done (I C BUS DRI-RS/RW/RC, DRI-GS/GW/GC, DRI-BS/BW/ same as beside procedure. 2
No. point Adjustment conditions/procedure Waveform or others No. point Adjustment conditions/procedure Waveform or others
1 CONVERGENCE 1. Receive the "Crosshatch Pattern" signal. 1 CRT CUTOFF Remark *Alternative Procedure
ADJ. 2. Using the remote controller, call NORMAL mode. ADJUSTMENT 1. Before CRT cutoff adjustment, SUB-BRIGHT, (1) Step (1), (2), (3) and (4) are
after the purity STATIC CONVERGENCE CONTROL) BC, CUT-R and CUT-G must be INITIAL DATA. (2) Then continue adjust until readjustment. 1. Turn the 4-pole magnet to a proper opening anG
2. Turn the 6-pole magnet to a proper opening anNO VIDEO signal. related test points as below gle in order to superpose the green colour over sistor. TP47G, BLUE = TP47B. *4. Next, checking AKB circuit function by slowly in(4) Then adjust Screen VR until the DYNAMIC CONVERGENCE R suddenly on and off (AKB start function). 3.3Vdc B Fig. 5-1
R ours. 1. Switch TV VIDEO mode,BLUE BACK OFF, with (3) Connect the oscilloscope to
B 2. CRT Cutoff adjustment must be done inside a trace line appear and make sure dark room. the colour appear whether red, green or blue.
gle in order to superpose the blue and red col-
2. Press R/C to set Picture Normal condition. which is based on colour appear blue and red colours. RGB 3. First, off the by adjust screen variable reat (2) RED TP47R, GREEN =
1. Adjust convergence on fringes of the G crease screen variable resistor until colour raster tip of signal reach 3.3Vdc.
screen in the following steps. 5. Then continue adjust until retrace line appear. a) Fig. 5-1: Drive the wedge at point "a" and swing 6. Finally, slowly decrease the screen variable rethe deflection coil upward. Fig. 5-2 sistor until screen retrace line cut off. (Not Raster) b) Fig. 5-2: Drive the wedge at points "b" and "c" Note : and swing deflection coil downward. Must confirm the AKB function in set before B c) Fig. 5-3: Drive the "c" wedge deeper and swing
R 0 the deflection coil rightward.
NESS hatch pattern with 5 black level windows) the deflection coil leftward.
d) Fig. 5-4: Drive the "b" wedge deeper and swing 2 SUB-BRIGHT1. Call " SUB-BRI" in service mode. (Receive Cross1 Fig. 5-3 (I C BUS that line 1and 2 have the tapesame overdarkness them.2
2. Fix all wedges on the CRT and apply glass ADJUSMENT *(2) Adjust the SUB BRIGHT " bus data in order 1 2 3 4 5
R 2. Finally data minus 1 to make line 1, 2, B brighter than line 2 magnet unit lock screw.
BGR CONTROL) wherelse line 3 is one step (data) brighter than 3. Apply lacquer to the deflection yoke lock screw,
magnet unit (purity, 4-pole, 6-pole magnets) and G Line 3 is one step (data) and 3 are in same level (darkness).
1 2 3 4 5 Fig. 5-4
Finally received the Red-only and Blue-only signals to make sure there is no other colours on the
Wedge "a" About 100Â° Lacquer Wedge "c" "b"
4-pole magnet 6-pole magnet CRT neck
Note*** SAMSUNG CRT : 32mm CPT CRT : 35mm TOSHIBA CRT : 35mm