Sony RDR-VX500 Manual De Servicio página 107

No Power Detected
(stand by LED OFF)
NO
F1S01 is normal? Change fuse
YES
NO
Change short circuited or
BD01~04, ZD1S01~2
opened parts
SHORT and OPEN
are normal?
YES
NO
Is there voltage at
Check 2'st Voltage
Collector of
Q1S01
YES
NO
Operation of
Replace Q1S01
Q1S01 is
normal?
YES
Check feedback IC1S01
Key Operation or
Remote Control Error
Is the measurement of NO
Check power and front connector
power with in normal value?
YES
NO
XT601 14.318MHz
Check the circuity around the clock
oscillation is normal?
YES
NO
Check the circuity
Check the circuity around
around IC601 reset? IC601 reset
YES
NO
Check the soldering
Check the soldering around the
IC601
around IC601 good?
YES
Check the circuity around the swith.
check the condition of commmunication
NO
Key operatious such
with Main Micom
as STOP,PLAY,OPEN
(IC601 83~86, VFD STB, CLOCK
are normal?
DATA-IN,DATA-OUT)
YES
End repairs
STOP,PLAY,OPEN
Key operatious are
normal?
Change IC701
YES