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4-7
Distorted audio and loud noise
No
Yes
No
Yes
Yes
No
No
Distorted audio and
loud noise
Replace R84, R94,R100,R107,R116,R124
Check Q3
Replace Q11~Q19
Check whether the muting transistor
R84,R94,R100,R107,R116,R124 are
normal
Yes
Check whether the muting
transistor Q11,Q12,
Q13,Q15,Q17,Q19are normal
Checking the U6 leads the
feet has no to break to
open
&RUUHFWFRQQHFWLRQ
Replace R86,R87
Check the voltage on
pin3 or pin5 of U6 is OK.
(Should be 2.5~3.1V)
Check whether the U1 or
U6 powersupply normal
No
Yes
Check the power supply voltages
+12V to the operation amplifying
Q3 is normal.
Yes
Check U6
Replace U1 or U15
No
Yes
Trouble shooting chart
Содержание DVP3256K
Страница 24: ...A A B B C C D D E E 1 1 2 2 3 3 4 4 SWITCH BOARD K301 stop 1 2 CN301 1 2 6 2 6 2 Switch Board Electric Diagram ...
Страница 31: ...6 9 6 9 Front Board Print layout Bottom side ...
Страница 32: ...6 10 6 10 Switch Bord Print layout Bottom side ...
Страница 33: ...6 11 6 11 OK USB Board Print layout Bottom side ...
Страница 34: ...6 12 6 12 Power Board Print layout Bottom side ...
Страница 35: ...6 13 6 13 Main Board Print layout Top side ...
Страница 36: ...6 14 6 14 Main Board Print layout Bottom side ...
Страница 40: ...REVISION LIST Version 1 0 Initial release 8 1 ...