14U10/15
14U20/25
UDIO)
ey
u AV in.y of the
3 dB.
?.
ocedureWaveform or othersocedureWaveform or others
Vrms by volume key.
9-2
, and the NORMAL k
attern" signal.
ect is OK or not.TINT.ve an OSD displa
(Continued)oofer" output with a 22 kilo-
.ect is OK or not.ect is OK or not.
ect is OK or not.
TION CHECKING (VIDEO AND A
Conditions/Adjusting prConditions/Adjusting pr
CONTRAST: MAXCOLOUR: CENTERBRIGHTNESS: CENTERTINT: CENTERSHARPNESS: CENTER
100% Mod.)ohms impedanceMake sure that output is 4.0Vp-p CONTRAST effthe COLOUR effthe BRIGHTNESS efffor GREEN direction and DOWN for PURPLE di- rection whether is OK or not.SHARPNESS effchannel number in green colour under AFT ON condition.is pressed, all the settings will be present to nor- mal setting. (Normal setting value for every mode).?????
1.Receive "PAL Colour Bar" signal (Sound 400Hz,2.Set the sound output to 2.83 3.Terminal the "Sub-W1.Receive "Monoscope P2.Set P-Mode to select CONTRAST3.Press Volume Up/Down key to check whether the1.Receive "Color Bar" signal. 2.Set P-Mode to select COLOUR. 3.Press Volume Up/Down key to check whether1.Receive "Monoscope Pattern" signal. 2.Set P-Mode to select BRIGHTNESS. 3.Press Volume Up/Down key to check whether1.Receive the "NTSC Colour Bar" signal thr2.Set P-Mode to select 3.Press Volume Up/Down key to check TINT, UP1.Receive "Monoscope Pattern" signal. 2.Set P-mode to select SHARPNESS. 3.Press Volume Up/Down key to check whether the1.All Ch (1~99) will ha1.Once in PICTURE Mode
A/V INPUT AND OUTPUT CHECKING
Adjusment pointSUBWOOFER OUTPUT CHECKAdjusment pointCONTRAST keyCOLOUR keyBRIGHTNESS keyTINT keySHARPNESS KeyCH DISPLAY COLOURNORMAL Key
31234567
No.FUNCTION OPERANo.
B
Fig. 1-1
CyGMgR
Y
W
(SAME LEVEL)each short test.
* Select one of Q883/5/7 to do
,
TV,
White
vice mode. Ad-
ocedureWaveform or othersocedureWaveform or othersocedureWaveform or others
TP853 (P882 PIN5)9-1
x to 27V, and make sure
sec/Div.
?
sure the O/P is as specified
sure the output is as specified (1.0?3 dB).
3 dB).
Conditions/Adjusting prConditions/Adjusting prConditions/Adjusting pr?
Range: 100mV/Div. (AC)(Use Probe 10:1)Sweep time: 10
NTSC CHROMA ADJUSTMENTthrough AV 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.(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 C475)ance. Make Vp-p pedance. Make (1.76 Vp-p make sure that the modes change in order of 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 3.Call the "SUB-TINT" mode in ser4.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 Bo1.Once finish rectified Electrolytic Capacitor short1.Receive the "PAL Color Bar" signal (100% 2.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
Adjusment pointSUB-TINT (IBUS CON- TROL)Adjusment pointBEAM PRO- TECTORH, V PROTEC- TOROTHER PROTECTORAdjusment pointVIDEO AND AUDIO OUTPUT CHECKVIDEO AND AUDIO INPUT CHECK
112312
No.No.No.
9 |
ACEC
SHARP
