14D1-S/G/W
14D2-S/G
B
Fig. 1-1
CyGMgR
SAME LEVEL
Y
W
each short test.
* Select one of Q883/5/7 to do
9-2
sec/div.
m
100mV/div. (AC)(Use Probe 10:1)
3 dB).
?
Make sure the O/P is as specified
3 dB).
Make sure the output is as specified (1.0?
Range: Sweep time: 10
NTSC CHROMA ADJUSTMENTAV in.BLUE-OUT. EEjust 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)Color Bar, Sound 400 Hz 100% Mod).ance. Vp-p pedance. (1.76 Vp-p make sure that the modes change in order of TV, AV & TV again and the video & audio output are according to the input terminal for each mode.If connect input to Front and Rear AV terminal, in- put terminal of Front AV will be selected.
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 short1.Receive the "PAL Color Bar" signal (100% White2.Terminate the Video output with a 75 ohm imped-3.Terminate the Audio output with a 10k ohm im-1.Using the TV/AV key on the remote controller,
A/V INPUT AND OUTPUT CHECKING
2CPROTECTOR OPERATION CHECKING
SUB-TINT (IBUS CON- TROL)BEAM PRO- TECTORHYV PROTEC- TOROther protectorsVIDEO AND AUDIO OUTPUT CHECKVIDEO AND AUDIO INPUT CHECK
112312
No.Adjusting pointAdjusting procedure/conditionsWaveform and othersNo.Adjusting pointAdjusting procedure/conditionsWaveform and othersNo.Adjusting pointAdjusting procedure/conditionsWaveform and others
B
MgR
G
Fig. 1-1
Cy
Y100%W
W
75%
A.(14")
m
100
?
.
9-1
Fig. 1-1
(Continued)sec/div.
m
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(D881 Cathode). EEAdjust SUB COLOUR bus data, so that the 75% White & Red portions of PAL Color Bar be at the same level shown as
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 800 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 17. * 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 to4.Using the R/C call "SUB COL" in SERVICE mode.5.Clear the SERVICE mode.
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
No.Adjusting pointAdjusting procedure/conditionsWaveform and othersHORIZONTAL AND VERTICAL DEFLECTION LOOP ADJUSTMENTCRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENTNo.Adjusting pointAdjusting procedure/conditionsWaveform and othersNo.Adjusting pointAdjusting procedure/conditionsWaveform and others
9 |
ACEC
SHARP
