21BM2GMK2
B
Fig. 1-1
CyGMgR
SAME LEVEL
Y
Waveform and othersWaveform and othersWaveform and others
W
each short test.
* Select one of Q883/5/7 to do
,
Ad-TV,
AV terminal, in-
, and make sure
ADJUSTMENT
TP47B (P882 pin 5)
9-2
sec/div.AV will be selected.
?
100mV/div. (AC)(Use Probe 10:1)
3 dB).
?
Make sure the O/P is as specified
3 dB).
Adjusting procedure/conditionsAdjusting procedure/conditionsAdjusting procedure/conditionsMake sure the output is as specified (1.0?
Range: Sweep time: 10
NTSC CHROMAAV in.BLUE-OUT. ??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)Color Bar, Sound 400 Hz 100% Mod).ance. Vp-p pedance. (1.76 Vp-p make sure that the modes change in order of AV & TV again and the video & audio output are according to the input terminal for each mode.If connect input to Front and Rear put terminal of Front
1.Receive the "NTSC 3.58 Colour Bar" signal thru2.Connect the oscilloscope to 3.Call the "SUB-TINT" mode in service mode. 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 27V1.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 pointNo.Adjusting pointNo.Adjusting point
B
MgR
G
Fig. 1-1
Cy
ADJUSTMENT
Y100%W
ADJUSTMENT
Waveform and othersWaveform and othersWaveform and others
W
75%
A.
?
TP603 (+)olume key
100 VICE mode.
?
100
.
AL Color Bar be at the9-1
AND SUB-CONTRAST -LIN" by Volume key till-CENT" by Volume key-AMP" by Volume key to
Fig. 1-1
(Continued)sec/div.
?
).
�
Adjusting procedure/conditionsAdjusting procedure/conditionsAdjusting procedure/conditions
Range: 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.PAL CHROMA ADJUSTMENTRed cathode(0882 Chathode). ??Adjust SUB COLOUR bus data, so that the 75% White & Red portions of P same level shown as 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.
1.Receive the "Monoscope Pattern" signal. 2.Press R/C to set Picture NORMAL condition. 3.Connect the DC miliammeter between 4.Beam current must be within 11.Receive Monoscope Pattern Signal. 2.Call the "V-LIN" mode. 3.Increase or decrease "V1.Call the "V-CENT" mode. 2. Increase or decrease "V1.Call the "V-AMP" mode. 2.Increase or decrease "V1.Call the "H-CENT" mode. 2.Increase or decrease "H-CENT" by V1. SET DATA TO 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 to4.Using the R/C call "SUB COL" in SER*Before adjust SUB-COL, make sure COL-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 pointHORIZONTAL AND VERTICAL DEFLECTION LOOPCRT CUT-OFF, BACKGROUND No.Adjusting pointNo.Adjusting point
9 |
ACEC
