Read Sharp XV-Z7000 (serv.man5) Service Manual online
35
XV-Z7000U/E
AN-Z7T
YES
YES
YES
YES
YES
YES
YES
NO
Checking the
microcomputer
peripherals
Is a voltage of about 3V
applied to pin (33) (RCS)
of IC1601?
applied to pin (33) (RCS)
of IC1601?
Check the intake filter
cover for poor fitting and
the cooling fan for trouble.
cover for poor fitting and
the cooling fan for trouble.
Check IC1601, IC1606 and
their peripheral circuits.
their peripheral circuits.
Is the signal level at pin
(7) of IC8037 about 0V?
(7) of IC8037 about 0V?
End
End
Set SW1602 to
"NORMAL" position.
"NORMAL" position.
NO
Is SW1602 set at
"NORMAL" position?
"NORMAL" position?
NO
NO
Check IC8018, IC8019,
IC8020 and their peripheral
circuits as well pin (26) of
IC1601 and its peripheral
circuits.
IC8020 and their peripheral
circuits as well pin (26) of
IC1601 and its peripheral
circuits.
Check IC8021 and
IC8022. Replace the PC
interface as required.
IC8022. Replace the PC
interface as required.
NO
NO
Check all the ICs
connected with the
SDA3/SCL3 and
SDA5/SCL5 lines.
connected with the
SDA3/SCL3 and
SDA5/SCL5 lines.
NO
Is there pulse signal at
pin (64) of IC1601?
pin (64) of IC1601?
Is there pulse signal at pin
(1) of IC1601?
(1) of IC1601?
Is there signal at pins (1),
(3), (4) and (6) of IC1802?
(3), (4) and (6) of IC1802?
Check all the signals (A1
thru A17 and D1 thru D15)
of IC8021 with oscilloscope.
Are signal levels 0V and
3V?
thru A17 and D1 thru D15)
of IC8021 with oscilloscope.
Are signal levels 0V and
3V?
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