Service manual

Samsung Electronics 7-1
7. Troubleshooting
No Search Operation
PS0, PS1 is input
SIC1-2, 3 terminal from
SIC8-1, 7?
Actual velocity occurs
at SIC1-73 terminal?
Actual velocity occurs
at DRIC2-11, 12 terminal?
Check SIC8 peripheral circuit.
0.1Vp-p sine wave
occurs at search at SIC8-2, 6
terminal?
Replace Hall PCB
Check SIC1 peripheral circuit.
Check DRIC2 peripheral circuit.
No No No No
Yes
TE occurs in
search range?
Focus On?
Yes Yes
Yes
No
Yes
A
See "Fine Seek Check"
No
FINE SEEK Check
FINE SEEK MIRR
signal (RIC1-57) is missing?
TZCO signal
(SIC1-52) is occurs?
Track incomming is
delayed?
TE is within
2V and 3V?
Pick-up transfer smooth.
Check RIC1 Peripheral curcuit.
Check SIC1 Peripheral curcuit.
Time out due to many jump counts.
Check SIC1 peripheral circuit.
SIC1-76 output
is normal?
DRIC2-17, 18
terminal outputs are
normal?
Check CN6 and pick-up.
Check MECHA.
Check RIC1-36 terminal.
Check DRIC2 peripheral circuit.
Yes Yes
Yes Yes
Yes Yes
Yes
Yes
No No No
No
No
No