14R2MK2
21R2MK2
B
Fig. 9
CyGMgR
Y
W
SAME LEVELeach short test.
* Select one of Q883/5/7 to do
9-2
sec/div.
m
3 dB).
?
Make sure the output is as specified
Make sure the output is as specified (1.0?3 dB).
Range: 100mV/div. (AC)(Use Probe 10:1)Sweep time: 10
NTSC CHROMA ADJUSTMENTthrough AV in.P882) BLUE-OUT. EEjust the "SUB-TINT" bus data to obtain the wave- form shown as Fig. 9.make sure the protector ON and switch to standby mode.(R606 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, AV1, AV2 & TV again and the video & audio out- put are according to the input terminal for each mode.
1.Receive the "NTSC3.58 Colour Bar" signal2.Connect the oscilloscope to TP853 (Pin (5) of3.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 D607 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- TECTORH, V 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
CyFig. 8
Y100%W
W
75%
9-1
.
Fig. 8
sec/div.
m
PAL CHROMA ADJUSTMENTRange: 20 V/div. (AC) (Using 10:1 probe)Sweep time: 10
the horizontal line in the center of monoscope is just at the position where the blanking starts.till the picture is centered.to set overscan of 9.5% typical. Adjustment Spec 9.5% range +1% -0%.to center the picture horizontal.EEAdjust SUB COLOUR bus data, so that the 75% White & Red portions of PAL Colour Bar be at the same level shown as
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 keyFIXED DATA, NO NEED TO ADJUST.1.Call the "H-CENT" mode. 2.Increase or decrease "H-CENT" by Volume key1.Receive the "Monoscope Pattern" signal. 2.Press R/C to set Picture NORMAL condition. 3.Adjust the focus control to get the best focus.1.Receive the "PAL Colour Bar" signal. 2.Press R/C to set Picture Normal condition. 3.Connect the oscilloscope to Red cathode(TP854).4.Using the R/C call "SUB COL" in SERVICE mode.5.Clear the SERVICE mode.
2C
(H2C
2C
2C BUS
2C BUS2C BUS
V-SLOPE(IBUS CON- TROL)V-SHIFT 50 (ICONTROL)V - AMP 50 (IBUS CON- TROL)S-CORREC- TION(ICONTROL)H-SHIFT 50 - CENTER) (IBUS CONTROL)Focus adjustmentSUB COLOUR (ICONTROL)
HORIZONTAL AND VERTICAL DEFLECTION LOOP ADJUSTMENTNo.Adjusting pointAdjusting procedure/conditionsWaveform and others1234561
No.Adjusting pointAdjusting procedure/conditionsWaveform and others
9 |
ACEC
