Sharp DV-NC65H, Руководство по обслуживанию

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DV-NC65H/S
DV-NC70H
FLOW CHART NO.19
NO
YES
YES
NO
YES
NO
YES
NO
YES
NO
NO
NO
NO
YES YES
Is picture signal inputted into pins(28) and (31) of IC201?
Is picture signal outputted to the pin(52) of IC201?
Is picture signal inputted into the pin(49) of IC701?
Check the line between pin(52) of IC201 and pin(49) of IC701.
Is 5V applied to the pin(12) of IC201?
Check the PC 5V line.
1
U/V tuner mode, LINE1/LINE2 input mode:
Is picture signal output at the pin(5) of IC2501?
• U/V tuner mode: Check the line between the pin(24) of TU101 and the pin(18) of IC2501. • LINE1, LINE2 input mode: Check the line between LINE1 and LINE2 terminal, and the pins(23) and (28) of IC2501.
2
LINE3 (FRONT) input mode:
Is picture signal output at the pin(2) of IC2002?
Is picture signal outputted to the pin(47) of IC701 ?
Is 5V applied to the pin(51) of IC701?
Check the V
DD
line of IC701.
Is picture signal outputted to the emitter of video output buffer (Q251)? VCR/DVD OUT: Is there picture signal input at the pin(6) of IC2003?
Check the line between pins(62) and (63) of IC201 and pins(84) and (85) of IC701.
Check Q251 periphery.
NO
Check the line between the Q251 emitter and the pin(5) of IC2003.
Is there picture signal output at the pin(2) of IC2003?
YES
NO
Check the VIDEO OUT terminal (J1202) and the line between the pin(2) of IC2003 and the VIDEO OUT terminal (J1202).
YES YES
Is the pin(1) of IC2003 on "L" level?
Replace IC2003.
NO
Check the DVD-(H) line.
NO
Is 5V applied to the pin(6) of IC2003?
Check the PC 5V line.
Are serial data and clock signal applied to the pins (63) and (62) of IC201?
YES
Check the line between the pin(5) of IC2501 and the pin(31) of IC201.
YES NO
NO
Check the line between LINE3 (FRONT) input terminal and the pin(6) of IC2002.
NO
Is picture signal input at the pin(6) of IC2002?
YES
Is 5V applied to the pin(3) of IC2002?
YES
NO
Is the pin(1) of IC2002 on "L" level?
Check the PC 5V line.
NO
Check the DUB (H) line.
Replace IC2002.
YES
Picture E-E does not appear.
LINE1, LINE2 output: Is there picture signal input at the pin(5) of IC2706?
Check the line between Q251 emitter and the pin(5) of IC2706. (Check the pin(2) of SC2505 and the pin (18) of SC2721.)
YES YES
Is there picture signal output at the pin(7) of IC2706?
NO
Check the line between the pin(7) of IC2706 and the pin(7) of IC2501. (Check C2522.)
NO
Is there picture signal input at the pin(7) of IC2501?
YES YES
Is there picture signal output at the pin(25) and the pin(26) of IC2501?
pin(25) : LINE1 output pin(26) : LINE2 output
Check the line between IC2501 periphery and the output terminal periphery.
Is 5V applied to the pin(6) of IC2706?
NO
Check peripheral circuit of IC2501.
NO
YES
NO
Is the pin(4) of IC2706 on "H" level?
Check the PC 5V line.
NO
Check the line between Q2302 collector and the pin(4) of IC2706, and check the DVD-(H) line.
Replace IC2706.
YES