Samsung DVD-N501 Service Manual page 25

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