14BM2, 14BM2S/G
20BM2, 20BM2S/G
21BM2, 21BM2S/G
B
Fig. 9
CyGMgR
Y
W
SAME LEVEL
short test.
* Select one of Q883/5/7 to do each
.
9-2
sec/Div.Fig. 9
m
3 dB).
?
(Use Probe 10:1)
3 dB).
?
Range: 100 mV/Div. (AC) Sweep time: 10
AV in.P882) BLUE-OUT. EEAdjust the OSUB-TINT� bus data to obtain the waveform shown as short, 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)White Color Bar, Sound 400 Hz 100% Mod C475.)pedance. Make sure the output is as specified (1.0 Vp-p impedance. Make sure the output is as speci- fied (1.76 Vp-p make sure that the modes change in order of TV, AV1, AV2 & TV again and the video & audio output are according to the input terminal for each mode.
NTSC CHROMA ADJUSTMENT
1.Receive the ONTSC 3.58 Colour Bar� signal thru2.Connect the oscilloscope to TP853 (Pin (5) of3.Call the OSUB-TINT� mode in service mode.4.Clear the SERVICE mode.1.Receive OMonoscope Pattern� signal. 2.Set CONTRAST MAX. 3.Set BRIGHT MAX. 4.During the Collector & Emitter of Q883/5/71.Receive OMonoscope 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 OPAL Colour Bar� signal (100%2.Terminate the Video output with a 75 ohm im-3.Terminate the Audio output with a 10K ohm1.Using the TV/AV key on the remote controller,
A/V INPUT AND OUTPUT CHECKING
PROTECTOR OPERATION CHECKING
2C BUS
(ICONTROL)PROTECTORPROTECTORPROTECTORAUDIOOUTPUT CHECKAUDIO INPUT CHECK
1SUB-TINT1BEAM2H, V3OTHER1VIDEO AND2VIDEO AND
NO.Adjustment partAdjusting procedure and conditionsWaveform and othersNO.Adjustment partAdjusting procedure and conditionsWaveform and othersNO.Adjustment partAdjusting procedure and conditionsWaveform and others
B
MgR
G
CyFig. 8
Y100%W
W
75%
.
Fig. 8
9-1
sec/Div.
m
Range: 20 V/Div. (AC) (Use 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.PAL CHROMA ADJUSTMENTEEmode. Adjust 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 OV-LIN� mode. 3.Increase or decrease OV-LIN� by Volume key till1.Call the OV-CENT� mode. 2.Increase or decrease OV-CENT� by Volume key1.Call the OV-AMP� mode. 2.Increase or decrease OV- AMP� by Volume keyFIXED DATA, NO NEED TO ADJUST.1.Call the OH-CENT� mode. 2.Increase or decrease OH-CENT� by Volume key1.Receive the OMonoscope Pattern� signal. 2.Press R/C to set Picture NORMAL condition. 3.Adjust the focus control to get the best focusing.1.Receive the OPAL Colour Bar� signal. 2.Press R/C to set Picture Normal condition. 3.Connect the oscilloscope to Red cathode.4.Using the R/C call OSUB COL� in SERVICE5.Clear the SERVICE mode.
2C BUS2C BUS2C BUS2C BUS2C BUS2C BUS
V-SLOPE (ICONTROL)V-SHIFT-50 (ICONTROL)V-AMP 50 (ICONTROL)S-CORRECTION (ICONTROL)H-SHIFT (50) (H-CENTER) (ICONTROL)FOCUS ADJUSTMENT(ICONTROL)
HORIZONTAL, VERTICAL, DEFLECTION LOOP AND FOCUS ADJUSTMENT
1234511SUB COLOUR
NO.Adjustment partAdjusting procedure and conditionsWaveform and othersNO.Adjustment partAdjusting procedure and conditionsWaveform and others
9 |