Read Sharp XV-Z7000 (serv.man5) Service Manual online
45
XV-Z7000U/E
AN-Z7T
Checking the audio
signal
Are there audio output
signals at pins (7) of
IC3301 and IC3302?
signals at pins (7) of
IC3301 and IC3302?
Is voltage applied to pin (4)
of IC1901?
of IC1901?
Using the remote control,
change VOL and cancel
MUTE. Does the voltage at
pin (7) of IC1901 vary
accordingly?
change VOL and cancel
MUTE. Does the voltage at
pin (7) of IC1901 vary
accordingly?
NO
NO
NO
Is there audio output signal
at pin (5) of IC1901?
at pin (5) of IC1901?
YES
YES
YES
YES
Check IC1403, IC1605 and
their peripheral circuits.
their peripheral circuits.
NO
Check IC1901 and its
peripheral circuits.
peripheral circuits.
Check the SP connector.
Check R1914 first and
then the power circuit.
then the power circuit.
Check the audio cable.
Switch IC3301 and IC3302
to each other to check the
peripheral circuits.
Switch IC3301 and IC3302
to each other to check the
peripheral circuits.
Checking the RS-232C
Using the communication
software ("TERA TERM"
recommended), make the
following settings:
Baud rate: 9600 bps
Bit length: 8 bits
Stop bit: 1 bit
Parity: None
Press the RETURN key on
the keyboard. Does "ERR"
reappear?
software ("TERA TERM"
recommended), make the
following settings:
Baud rate: 9600 bps
Bit length: 8 bits
Stop bit: 1 bit
Parity: None
Press the RETURN key on
the keyboard. Does "ERR"
reappear?
NO
YES
End
Check IC3601, IC1606,
IC1601, SW1602, IC8022,
communication circuit and
their peripheral circuits.
IC1601, SW1602, IC8022,
communication circuit and
their peripheral circuits.
