21A2-X 14A2-X
CONVERGENCE ADJUSTMENTCRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT
NO. Adjustment partAdjusting procedure and conditionsWaveform and othersNO. Adjustment partAdjusting procedure and conditionsWaveform and others
1CONVERGENC1. Receive the "Crosshatch Pattern" signal.1CRT CUTOFF1. Switch TV to VIDEO mode, BLUE BACK OFF
BGR3.0Vdc
ADJ.2. Using the remote controller, call NORMALADJUSTMENTwith NO VIDEO signal.
(To be donemode.(I2C BUS2. Press R/C to set Picture Normal condition.
B
after the purityGCONTROL)3. Connect the oscilloscope to Red OUT from
adjustment.) Static convergenceRIC801.(TP852)
1. Turn the 4-pole magnet to a proper opening
angle in order to superpose the blue and redRange: 1 V/Div (DC)
Fig. 5-1
colours.Sweep: 5 msec/Div
1 V
2. Turn the 6-pole magnet to a proper openingRGB
angle in order to superpose the green colour4. Adjust SCREEN VR, so that the tip of signal0
over the blue and red colours.Rreach 3.0 +0.1 Vdc.Fig. 6
G
B2SUB-1. Call "SUB-BRI" in service mode. (Receive
Dynamic convergence
1. Adjust the convergence on the fringes of theBRIGHTNESSCrosshatch pattern with 5 black level windows)
screen in the following steps.Fig. 5-2ADJUSMENT2. Adjust the "SUB BRIGHT" bus data in order
a) Fig. 5-1: Drive the wedge at point "a" andRGB(I2C BUSthat the line 1, 2 and 3 have the same darkness1 2 3 4 5
swing the deflection coil upward.BCONTROL)wherelse line 4 is slightly brighter than line 1,
b) Fig. 5-2: Drive the wedge at points "b"G2 and 3 and finally line 5 will be the brighter
R1, 2 and 3 are in same black level.
and "c" and swing the deflection coilthan line 4.
downward.Fig. 7
c) Fig. 5-3: Drive the "c" wedge deeper and
3WHITE1. Receive the "Monoscope Pattern" signal.Refer to Page 6.
swing the deflection coil rightward.Fig. 5-3
BALANCE2. Press R/C to set Picture NORMAL condition.* 7500°KX : 0.300
d) Fig. 5-4: Drive the "b" wedge deeper and
BGRSERVICE3. Connect the DC miliammeter between TP602Y : 0.310
swing the deflection coil leftward.RMODE ADJ.(-) and TP603 (+).* 12,300°KX : 0.272
2. Fix all the wedges on the CRT and apply glassG2
(IC BUS4. Check Beam current should be around 800 ?AY : 0.275
tape over them.B
CONTROL)(14") / 1,100 ?A (21").
3. Apply lacquer to the deflection yoke lock screw,5. Set it to service mode and adjust the " (MINOLWPG"TA COLOUR ANALYZER
8magnet unit (purity, 4-pole, 6-pole magnets)
(White Point-G), "WPB" (White Point-B) dataCA-100)
and magnet unit lock screw.to have a colour temperature of 12,300!K or*Note: AboveData can be UP/
Fig. 5-4
7,500!K (white). * Note .DOWN by Volume key.
Finally received the Red-only and Blue-only
Wedge "a"6. When changed back to non-service mode, ad-
signals to make sure there is no other colours
just the Contrast & Brightness control to have a
on the screen.
beam current of 200?A. If the colour temperature
AboutAbout
is not at 12,300°K or 7,500°K go back to No. 1.
100°100°
LacquerNote: This adjustment must be done after
warming up the unit for 30 minutes
or longer with a beam current over
WedgeWedge500?A (14") / 700 ?A (21").
"b""c"
Fig. 5-5* ADJUST DRI-GC/GW, DR-BC/BW AS FOL-
LOWING DATA, AFTER FIHISHING DRI-GS
4-pole magnetAND DRI-BS.
6-pole magnetDRI-GC/GW DATA: "DRI-GS"-7 DATA
DRI-RC:27
CRT neck
DRI-BW DATA: "DRI-BS" -5 DATA
DRI-BC=DRI-BS
4Maximum1. Receive the "Monoscope Pattern" signal.
beam check2. Press R/C to set Picture NORMAL condition.
20mm3. Connect the DC miliammeter between TP603
Lacquer(21")
Purity magnet(+) and TP602 (�).
40mm(Full Scale: 3 mA Range)
(14")
4. Beam current must be within 800 ?A (14") /
Fig. 5-6
1,100 ?A (21")?100 ?A.
8-18-2 |
ACEC
SHARP
