Strong SRT4375 Service Manual page 28

Action) : Do U2(39VF800A Flash ROM) and U1(L64108 CPU) Re-solder
5.2.3. POSITIONER fail
(1) hen do to act AUTO LIMMIT in POSITIONER MENU SMPS side RELAY both
that act confirm
Action) : If RELAY in SMPS acts both, MAIN board side circuit is
(2) Change SMPS and try TEST
(3) Do L64108 re-soldering .
(4) Do L64108 change .
5.2.4. "CI CARD INITIALIZING NOW...." Message becomes Display continually on screen and
when Menu transfer is slow Firmware again Download do .
5.2.5. When do not act whether FRONT 7-SEGMENT(DISPLAY) acts strangely
(7) Change FRONT PANEL
(8) Change MICOM(U700) (AT89C51)
U700 : Confirm by SCOPE whether 11.0592 MHzs break out in pin 19
(9) Confirm by SCOPE whether 11.0592 MHzs break out in U700-pin 18, 19
5.2.6. When VIDEO screen gets into Scratch occurrence
(1) If scratch is happened on Video screen and Audio noise or stop phenomenon
is happened Tuner change .
(2) Audio is normalcy and if scratch is happened Video screen U50 : (L64005)
U51 : (km416S1020 sdram) change
When Video Color is badness, U300 : (BT864) change.
(3)
(4) After Power ON, when that stop screen phenomenon happens U400 : (AKM4323) change
(5) Video Filter from Bt864A (Digtal Video Encoder)
Action) : If the Color signal is not operation. Shoud be Checking
if "Wait to Reset setting" Message comes continually when did
Factory Reset. Still, change U2(39VF800A Flash ROM) if do not
become.
normalcy and most change SMPS
43pin(SYSCLK) 27Mhz Of U300 and VCC(3.3V) if you have