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Troubleshooting
4.Troubleshooting
4-1 CheckpointsbyErrorMode................................................................4-2
4-2 MeasurestobetakenwhentheProtectionCircuitoperates...........4-18
4-3 Initialization&UpgradeMethods.......................................................4-20
.
Samsung Electronics 4-1
Troubleshooting
4-1 CheckpointsbyErrorMode
OscilloscopeSettingValues
Voltage/DIV 2V/div
TIME/DIV 100ms/div
4-1-1 PowerFailure
The power does not turn on.
UIC1 Main PCB; No Check if the No
pin 14, 40, 55 and 89 of 5V? C18 of the POWER PCB (SMPS)
is +5.6V.
Yes Yes
Replace the CN2 Connector/ Check the power circuit of the
Wire of SMPS. SMPS PCB
(Check if the outputs of FUSE:
F1, IC: U1 and TRANS: T1 are
measured.)
Check if the Check if the
No No
MAIN PCB POWER-SENSE is 5V. output voltages of ZD2 or R16 of
(Check the pin 22 of UIC1) SMPS are 5V.
Yes Yes
Check the pattern of the pin 22 Modify ZD2/ Measure the
of UIC1 of CN2 of the SMPS. resistance between the pin 22
and GND of Micom (UIC1).
If the resistance is 0 Ohm,
replace the UIC1.
Check if the No
pin 26 of UIC1 is 5V when the MAIN Replace the Micom (UIC1).
PCB is turned on.
B
4-2 Samsung Electronics
Troubleshooting
B
Check if the No Check if the pin 5 and 6 of
pin 5 and 6 of SWA2 of MAIN PCB the CN3 of the SMPS PCB is
are digital 5V. equal to or greater than 5V.
Yes
Check if the CN3 cable is
normal.
Samsung Electronics 4-3
Troubleshooting
4-1-2 NoSound(waveformwhen1KHz,-20dBsignalisinput)
No Sound
Check MPEG Output.
1
Check the outputs of Check if the
the pin 142: TSD0, the pin No VDD of 3.3V is measured No
143: TSD1, and the pin at the pin 1, 14, and 58
146: TSD2 of MIC1 of MIC1.
ES8381.
Yes
Refer to wave pattern
Yes image of Table 4-1.
Replace the MIC1 IC. Check if the pin 8 and 9 of
SWA2 are 3.3V.
Check DAC Output.
2
AIC1 WM8746ESD Check if the
No VDD of 5V is measured No
pin 27: FR, pin 25: FL,
pin 23: RR, pin 21: RL at the pin 1 and 28
pin 19: SW, pin 17: C of AIC15V.
Yes
Refer to wave pattern
Yes image of Table 4-2.
Replace the MIC1 IC. Check if the pin 5 and 6 of
SWA2 are 5V.
Check OP AMP Output.
3 Check if the
Check the voltage level of following VDD are measured
No No
the pin 1 and 7 of AFIC1, the pin 1 at the corresponding IC:
and 7 of ARIC1, and the pin 1 Pin 8: +12V
and 7 of ACWIC1. Pin 4: -12V
Refer to wave pattern Yes
Yes image of Table 4-2.
Replace the AFIC, ARIC, and Check if the pin 1 of SWA2 is
ACWIC IC. +12V, and check if the pin 3 of
SWA2 is -12V.
C
4-4 Samsung Electronics
Troubleshooting
C
Check Connector
Connectivity.
4
Check if signal
No
output is measured at the Replace JDIN1.
pin 1, 2, 3, 5, 6, and 7 of 13P
DIN Jack JDIN1.
Refer to wave pattern
Yes image of Table 4-3.
Check ADC Output.
5
Check if Data 0, 1, and 2 Check if
outputs are measured at the pin 17 No VDD of 5V is measured at the No
and 18 of MIC4 AK5384 and the following pins. MIC4: #1
pin 9 of MIC2 AK5381 MIC2: #6, #7
of the AMP PCB.
Yes
Refer to wave pattern
Yes image of Table 4-4.
Replace the MIC4 or MIC2 IC. Check if the pin 9 of MJ1 is 5V.
Check PWM Output.
6
Check if the
outputs of the pin 67,
and 68 of FL, the pin 61 and
62 of FR, the pin 58, and 59 of C, Check if
No No
the pin 54 and 55 of S/W, the pin 51, VDD of 3.3V is measured at
52 of RL, and the pin 48 of 49 pin 4, 10, 22, and 29.
of RR of the DIC9 PS9829
of the AMP PCB Yes
are measured.
Refer to wave pattern
image of Table 4-4.
Yes
Replace the DIC9 IC. Check if the pin 8 of MJ1 is
3.3V.
D
Samsung Electronics 4-5
Troubleshooting
D
Check POWER IC
Output.
7
Check if the outputs
of the pin 22, 25, 30, and
33 of AICFR, the pin 22, 25, 30,
Check if GVDD
and 33 of AICFL, the pin 22, 25, 30,
No is measured at the pin 1, 18, No
and 33 of AICRR, the pin 22, 25, 30,
19, and 36. Check if PVDD is
and 33 of AICRL, the pin 22, 25, 30,
measured at the pin 34, 29,
and 33 of AICSS, and the pin
26, and 21.
22, 25, 30, and 33 of
AICC of the TAS5152
of the AMP PCB Yes
are measured.
Replace the TAS5152 IC. GVDD MJ1 pin 6 12V
Yes PVDD MJ2 pin 1, 2, 3, 34.5V
Refer to wave pattern
image of Table 4-5-1
and 4-5-2.
8
Check if VDD of 3.3V is No Replace the JAS1 and JAS2
measured at the pin 4, 10, connectors.
22, and 29.
Connect the jack and
check the output.
4-6 Samsung Electronics
Troubleshooting
RWA3
WA1
RIC2
1
TUNER1
DIC1 VIC1
RWA1
HIC3
MPEG/MAIN Page, 7-5
1
1
MIC1 HIC1
MIC3
C1
TWA2
MIC6
MIC8
MIC4
RWA2
MIC5
WA1
MAIN PCB Top Page, 6-12
TWA1
PIC5 PIC4 PIC3