Sharp LC-13C2E, Service Manual

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15
LC-13C2E
TROUBLE SHOOTING TABLE
(Continued)
No picture
Check all the settings microprocessor's adjust process menu.
Is source GND normal?
Is CSCOM waveform normal?
Check R1212 and their peripheral parts. Check IC1109, Q1101, Q1102, D1101, R1120, R1130 and their peripheral parts.
Check R1231 and their peripheral parts.
Yes
No No
Becomes dark
No
Time passes, becomes dark
Is gate GND normal?
Is gate clock (GCK) normal?
Check R1223 and gate aray peripheral parts.
Yes
No
Check D1201 and their peripheral parts.
No
Is B-5.5V being outputted?
Is VCC being outputted?
Check T701's sec5V outputs line.
Yes
No
Is GSP waveform normal?
Check R1223 and their peripheral parts.
Yes
No
Becomes white.
Is 3.3V VHS being outputted?
Is source clock normal?
Check +3.3V outputs line of IC752.
Check R1210, R1211 and their peripheral parts. Check FB1203 and gate aray peripheral parts.
Is output of LBR and HG normal?
Yes Yes
No No No
Vertical line output
No picture
Check all the settings microprocessor's adjust process menu.
Is output of R0~R5 normal? Is output of G0~G5 normal? Is output of B0~B5 normal?
Check R1202, R1203 and their peripheral parts.
Check R1204, R1205 and their peripheral parts. Check R1206, R1207 and their peripheral parts.
Check T701's sec5V outputs line.
Yes Yes
No No
Colour is unusual
Is VLS 5V being outputted?
No
Picture image is gloomy
Is in/output of SPIO and SPOI normal?
Check R1209 and their peripheral parts.
No
No picture image inversion
Is output V0, V16, V32, V48 and V63 normal?
Check IC1106, IC1107, IC1108 and their peripheral parts.
No
Gradation defect
Is output of U/D normal?
Check Q1201 and their peripheral parts.
Yes
No