20D2-S/G
21D1-S/G
21D2-S/G
B
B
MgR
G
Fig. 1-1
CyFig. 1-1
CyGMgR
Y100%WSAME LEVEL
Y
Waveform and othersWWaveform and othersWaveform and othersW
75%
each short test.
* Select one of Q883/5/7 to do
.
9-2
Fig. 1-1
(Continued)sec/div.
?
PAL CHROMA ADJUSTMENTAdjust SUB COLOUR bus data, so that the 75% White & Red portions of PAL Color Bar be at the same level shown as *Before adjust SUB-COL, make sure COL-OP=8, COL-OS=8, COL-O3=4, COL-O4=4. After adjust SUB-COL, set COL-OP=14, COL- OS=14, COL-O3=10, COL-O4=10.
AV in.BLUE-OUT. ?Range: 100mV/div. (AC)(Use Probe 10:1) ?Sweep time: 10 just the "SUB-TINT" bus data to obtain the wave- form shown as Fig. 1-1.make sure the protector ON and switch to standby mode.(R610 side).the protector is not work.the protector is work.testing in +B line, check all possible damaged components on +B line. (Use random selected set for inspection)
NTSC CHROMA ADJUSTMENT
4.Using the R/C call "SUB COL" in SERVICE mode.5.Clear the SERVICE mode.1.Receive the "NTSC 3.58 Colour Bar" signal thru2.Connect the oscilloscope to TP47B (P882 pin 5)3.Call the "SUB-TINT" mode in service mode. Ad-4.Clear the SERVICE mode.1.Receive "Monoscope Pattern" signal. 2.Set CONTRAST MAX. 3.Set BRIGHT MAX. 4.During the Collector & Emitter of Q883/5/7 short,1.Receive "Monoscope Pattern" signal. 2.Connect output of Bias Box to D603 cathode3.Set voltage of Bias Box to 18V and make sure4.Set voltage of Bias Box to 27V, and make sure1.Once finish rectified Electrolytic Capacitor short
2CPROTECTOR OPERATION CHECKING
2C BUS
SUB COLOUR (ICONTROL)SUB-TINT (IBUS CON- TROL)BEAM PRO- TECTORH. V PROTEC- TOROther protectors
11123
No.Adjusting pointAdjusting procedure/conditionsNo.Adjusting pointAdjusting procedure/conditionsNo.Adjusting pointAdjusting procedure/conditions
ADJUSTMENT
Waveform and othersWaveform and othersWaveform and others
A.
?
100
?
9-1
(Continued)sec/div.
?
).
�
PAL CHROMA ADJUSTMENTRange: 20 V/div. (AC) (Using 10:1 probe)Sweep time: 10
& TP602 ( (Full Scale: 3 mA Range)the horizontal line in the center of monoscope is just at the position where the blanking starts.till the picture is centered.set overscan of 9.5% typical. Adjustment Spec 9.5% range +1% -0%.to center the picture horizontal.adjust V-Slope, V-Shift and V-Amp to makesure adjustment is in acceptable Ring-Shaped.Red Cathode(D882 Cathode) for 21" (Normal Neck). Red Cathode(D881 Cathode) for 20" (Mini Neck). ??
1.Receive the "Monoscope Pattern" signal. 2.Press R/C to set Picture NORMAL condition. 3.Connect the DC miliammeter between TP603 (+)4.Beam current must be within 1100 1.Receive Monoscope Pattern Signal. 2.Call the "V-LIN" mode. 3.Increase or decrease "V-LIN" by Volume key till1.Call the "V-CENT" mode. 2. Increase or decrease "V-CENT" by Volume key1.Call the "V-AMP" mode. 2.Increase or decrease "V-AMP" by Volume key to1.Call the "H-CENT" mode. 2.Increase or decrease "H-CENT" by Volume key1. SET DATA TO 20(21"), 17(20"). * Check the E-5 CH Monoscope Pattern then re-1. SET DATA TO 20.1.Receive the "Monoscope Pattern" signal. 2.Press R/C to set Picture NORMAL condition. 3.Adjust the focus control to get the best focusing.1.Receive the "PAL Colour Bar" signal. 2.Press R/C to set Picture Normal condition. 3.Connect the oscilloscope to
2C2C
2C BUS
2C BUS2C BUS
Max beam checkV-SLOPE (IBUS CON- TROL)V-SHIFT-50 (ICONTROL)V-AMP50 (IBUS CON- TROL)H-SHIFT (50) (H-CENTER)S-CORREC- TION(ICONTROL)SUB-SHARP- NESSFocusSUB COLOUR (ICONTROL)
412345611
CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST No.Adjusting pointAdjusting procedure/conditionsHORIZONTAL AND VERTICAL DEFLECTION LOOP ADJUSTMENTNo.Adjusting pointAdjusting procedure/conditionsNo.Adjusting pointAdjusting procedure/conditions
9 |
ACEC
