Samsung DVD-N501, Service Manual

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Troubleshooting
3-6
Samsung Electronics
No Power (120 Voltage)
(Standby LED OFF)
PFD01 error?
PDS01 voltage
is missing?
Replace PQR11.
Replace fuse.
Check PDS01 ~ 04.
No
No
Yes
Collector of
PQR11 output normal
voltage?
Check 2'd voltage.
No
Operation of
PQR11 is normal?
Replace PQR12.
Yes
No
Switching operation
of PQR11 is normal?
Replace PQR11.
Check feed back.
Yes
Yes
No
Yes
Video output error in
RCA Jacks
Power level is
normal at pin 6, 17, 20, 25, 28,
31, 36, 39 in VIC1(M)?
27MHz clock input
is normal at pin 4 in
VIC1(M)?
Check the connection between
pin 2 in PIC5 and Emmiter in PQS58.
VIC1(M) ; SAA7128
VIC1(J) ; MM1540
Check the connection between
pin 4 in NIC4 and pin 4 in VIC1(M).
Yes
Yes
No
No
MRST is high state
at pin 40 in VIC1(M)?
Yes
No
Control signal is
normal at pin 41, 42 in VIC1(M)?
(When power on
or Tray open)
Yes
No
Yes
Check the connection between
pin 27 in NIC7 and pin 40 in VIC1(M).
Check the connection between
pin 161, 162 in NIC1 and pin 41, 42 in VIC1(M).
Check the connection with
pin 253, 235, 236, 216, 197, 255, 256, 217 in NIC1.
Video data are inputed
normally at pin 9 ~ 16 in
VIC1(M)?
Analog signals output
normally at pin 30, 27, 24,
29, 23, in VIC1(M)?
No
Yes
C
Check the soldering
of VIC1(M).
Change VIC1(M).
No No