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Troubleshooting
4.Troubleshooting
4-1 CheckpointsbyErrorMode................................................................4-2 4-2 MeasurestobetakenwhentheProtectionCircuitoperates...........4-6 4-3 MICOMInitialization&Update............................................................4-7
Samsung Electronics
4-1
Troubleshooting
4-1 CheckpointsbyErrorMode
4-1-1 NoPower
No Power
Check MAIN PCB CON2 (P5) U-COM SUPPLY (DC 5.6V) Yes
No
Check SMPS PCB F1 (FUSE)
Check MAIN PCB CON2 (P7) POWER- SENS Voltage (DC 4.5-5V) Yes
No
Check FRONT PCB VFD P1-P21 (AC2.4-3.1V), IC1 P30: -32V Yes
No
Check pattern and Connector Wire
4-2
Samsung Electronics
Troubleshooting
4-1-2 NoOutput
No Output
MAIN PCB Check Signal at DIC4 (PS9829B) P15, P17 Yes
No
Check Mute on DIC4 P27 (H: Mute, L: Normal)
MAIN PCB Check Signal at AIC3 P10, P15 Yes
No
Check Patten
Check AIC3 P21 (DC5V), P18 (DC3.3V) Yes
No
Replace AIC3
Replace SMPS
Samsung Electronics
4-3
Troubleshooting
4-1-3 CDNoPlayorNoSound
CD No Play or No Sound
PLAYING OK
No Play
MAIN PCB IC2 P8 (5V)
Yes
MAIN PCB IC1 P36 (3.3V)
No Sound
No
Replace SMPS Check CD-Mute on UIC1 P69 (H: Mute, L: Normal) Low High
No Output Check
Reset SET or Check UIC1
4-4
Samsung Electronics
Troubleshooting
4-1-4 Protection
Protection
MAIN PCB UIC1 P99 (L: Protection, H: Normal) Low
High
Reset SET or Check UIC1
MAIN PCB CON2 P10 (3.3V) Yes
No
MAIN PCB CN106 P9 (12V), P1 (34.5V) Yes
No
Replace SMPS
MAIN PCB Check RIC/LIC/WIC (A66) P5 (12V) No
Yes
Replace the P5 (LOW) IC
Reset SET
Samsung Electronics
4-5
Troubleshooting
4-2 MeasurestobetakenwhentheProtectionCircuitoperates
4-2-1 OperationofPowerBlockProtectionCircuit
Cases of the SMPS Protection. 1. If there is over current at the AMP IC. (Speaker Wire Short) 2. If temperature of the Amp IC is over 150°C. 3. There is no power input at GATE DRIVER. Part Location ProtectionCircuitOperation Open
X X X X X X
PinNo. +12V (1)
Short
X X X
Remark
SMPSPCB
CN3
+5.6V (5) +3.3V (10, 11) +5V (12, 13) PVDD (about 34V) (1~3)
X
CN2
-12V (7) +12V (9)
4-6
Samsung Electronics
Troubleshooting
4-3 MICOMInitialization&Update
MICOMReset
During STANDBY mode, push the `STOP' button 5 Second. If power LED blinking, reset is finished.
MICOMupdate(OnlyforFlashMicom)
Back of the Set there is a slide hole for update JIG. To update Micom, it needs Computer, Rom Writer and USB Cables.
MICOMVersionCheck
1. Power off state. 2. Long press next key 5 seconds. 3. Check the display or OSD.
Samsung Electronics
4-7
MEMO
4-8
Samsung Electronics