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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 PIC1
Samsung Electronics 4-7
Troubleshooting
3
2
3
OIC1 UWA5 DWA1
WA4 RIC2
3
JDIN1
HWA1
KARAOKE, DAC/MAIN Page, 7-8
DIC1
RWA1
2
HIC4
AIC1
RIC1
2
KIC2
ACWIC1
MIC1
AFIC1
3 3
3
KCWIC2
BIC1
UIC1
KFIC2
MIC6
3
MIC4
ARIC1
UWA2 BWA1
MIC5
UWA3
MAIN PCB Top Page, 6-12
PIC9 PIC8 PIC7 PIC6 PIC5 PIC4 PIC3
4-8 Samsung Electronics
Troubleshooting
4
SUBAMP Page, 7-9
A5 DWA1
4
4 RIC2
JDIN1
DIC1 VI
RWA1
AIC1
RIC1
MAIN PCB Top Page, 6-12
ACWIC1
MIC1
AFIC1
M
KCWIC2
Samsung Electronics BIC1 4-9
2
Troubleshooting
6
5
MJW1_1
AICFL
MIC1
5
DIC11
AICFR
AMP Page, 7-4
MJ1
5
AICRL
DIC9
6
MJH2
6 AICRR
MIC7
5
MIC4
MIC2
MIC8
AMP PCB Top Page, 6-9
MIC5
AICSS
4-10 Samsung Electronics
MIC3
IC6
Troubleshooting
7
7
8
7
7
7
7
AMP Page, 7-4
7 8
Samsung Electronics 4-11
Troubleshooting
AICFL
MJ2
AICFR
AICRL
AICRR 8
7
AICSS
AICC JWP1
AMP PCB Top Page, 6-9
4-12 Samsung Electronics
Troubleshooting
4-1-3 NoAnalogVideoOutput
COMPOSIT(VIDEOOUT)
COMPOSIT (VIDEO OUT)
Check MPEG Output.
Check if VDAC No Check if VDD No
output is measured at the pin 134 of of 3.3V is measured at the pin 1, 14,
MIC1 ES8381. and 58 of MIC1.
Yes Yes
Replace the MIC1 IC. Check if the pin 8 and 9 of
Check VIDEO FILTER.
SWA2 is 3.3V.
Check if output No Check if VDD No
is measured at the pin 33 of of 5V is measured at the
VIC1 LA73054. pin 1 of VIC1.
Yes Yes
Check JACK Output. Replace the MIC1 IC. Check if the pin 5 and 6 of
SWA2 is 3.3V.
Check if VIDEO No Check the DJACK1
OUT output is measured at the connectivity and replace it if
DJACK1. necessary.
Samsung Electronics 4-13
Troubleshooting
COMPONENT(Y,Pb,Pr)
COMPONENT (Y, Pb, Pr)
Check the MPEG
Output.
Check if
YDAC, CDAC, and UDAC Check if the
No VDD of 3.3V is measured at No
outputs are measured at the pin 137,
138, and 139 of MIC1 the pin 1, 14 and 58
ES8381. of MIC1.
Yes
Yes
Replace the MIC1 IC. Check if the pin 8 and 9 of
Check the VIDEO SWA2 is 3.3V.
FILTER.
Check if
No Check if VDD No
output is measured at the pin
of 5V is measured at the pin 1
21, 23, and 25 of VIC1
of VIC1.
LA73054.
Yes Yes
Check the JACK Replace the MIC1 IC. Check if the pin 5 and 6 of
Output. SWA2 is 3.3V.
Check if No Check the VJACK1
Y, Pb, and Pr outputs are measured connectivity and replace it if
at VJACK1. necessary.
4-14 Samsung Electronics
Troubleshooting
4-1-4 NoHDMIVideoOutput
No HDMI Video Output
Check the HDMI signal
Output.
1
Check the outputs of Check VDD of
No No
the pin 218, 220, 222, 224, 226, MIC1 is 3.3V. Check if the pin 1, 14,
233, 234, and 235 of and 58 are 3.3V.
MIC1 ES8381.
Yes
Refer to wave pattern
Yes
image of Table 4-6.
Replace the MIC1 IC. Check if the pin 8 and 9 of
SWA2 are 3.3V.
2 Check VDD of HIC1.
No Check if the pin 8, 30, and 48 are No
Check the outputs of pin 126 ~ 155 of
HIC1 FLI2301BD. 3.3V. Check if the pin 16, 36,
and 68 are 1.8V.
Yes Refer to wave pattern Yes
image of Table 4-7.
Replace the HIC1 IC. Check if the pin 5 and 6 of
SWA2 are 3.3V.
Check if the pin 2 of HIC9 is
1.8V.
3
Check the outputs of Check VDD of HIC3.
the pin 26, 27, 29, 30, 32, 33, 35, No Check if the pin 28 and 34 are No
and 36 of HIC3 3.3V. Check if the pin 4 and 16
SIL9030CTU. are 1.8V.
Yes Refer to wave pattern Yes
image of Table 4-7.
Replace the HIC3 IC. Check if the pin 5 and 6 of
SWA2 are 3.3V.
Check if the pin 2 of HIC9 is
1.8V.
No
Check the HJACK Output. Replace the jack.
Samsung Electronics 4-15
Troubleshooting
RWA3
WA1
RIC2
TUNER1
1
DIC1 VIC1
RWA1
HIC3
MPEG/MAIN Page, 7-5
1
MIC1 HIC1
1 MIC3
C1
TWA2
MIC6
MIC8
MIC4
RWA2
MIC5
WA1
MAIN PCB Top Page, 6-12
TWA1
PIC5 PIC4 PIC3 PIC1
4-16 Samsung Electronics
Troubleshooting
2
RWA3
TUNER1
3
HDMI/MAIN Page, 7-7
C1 VIC1
3 2
HIC3
3
2
1 HIC1
MIC3
MAIN PCB Top Page, 6-12
TWA2
MIC8
Samsung Electronics 4-17
RWA2
Troubleshooting
4-2 MeasurestobetakenwhentheProtectionCircuitoperates
4-2-1 OperationofPowerBlockProtectionCircuit
Protection Circuit operates when power problem occurs in the SMPS.
1. When the voltage of the PVDD(CN02) of the SMPS is out of normal range.
Normal Voltage Range of PVDD(CN02): 33.5V ~ 34.5V
2. When OVER CURRENT flows in the POWER STAGE. (Over-Output and SPK Short)
3. When the temperature of the POWER STAGE is equal to or greater than 150