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Troubleshooting
4.Troubleshooting
4-1 CheckpointsbyErrorMode
4-1-1 PowerFailure
The power does not turn on.
5.8V output check Yes Check Main Assy
(COM3, Pin 1, Pin 2) 5.8V? - specially check around MICOM IC
(Vcc)
No
Check input voltage of IC5601 No
Replace IC5601
Cathode of DR5601 6 ~ 16V?
Yes
Check diodes (DR5601, DR3502) No
Replace Diode
OK?
Yes
Check primary side. No
Replace Fuse (5A 250V)
Fuse (F1) OK?
Yes
A
Samsung Electronics 4-1
Troubleshooting
A
Check SWITCHING IC (IC01) Yes
short test pin 8 to pin 1, 2, 3, 4, 5, 6, 7 OK Replace IC01
(means not short)?
No
Check M01. No
All pins are not shorted to each other. Replace M01
Yes
Check components around IC. No
Replace component if it has problem.
R13, R14, D06, D07, D05
Yes
Replace SMPS ASSY
4-2 Samsung Electronics
Troubleshooting
4-1-2 NoPower
No power detected
(Stand by LED off)
No
F1 is OK? Change Fuse
CON3 pin 1, 2 is 5.8V No No
ICFB01 pin 1 is 2.5V?
and CON2 pin 1~6 is 22V?
Yes Yes
Check MAIN PCB Check MAIN PCB Change SMPS
Samsung Electronics 4-3
Troubleshooting
4-1-3 NoSound(waveformwhen1KHz,-20dBsignalisinput)
No Sound
Check MPEG input.
1
IC1 ES8398 No
AUX2: pin 98, 99 Check TM1 or JA1.
TUNER: pin 96, 97
Refer to wave pattern
image of Fig. 4-1.
Check the PWM
output.
2 Check if VDD
Check if the outputs of No of 3.3V is measured at the No
the pin 83, 84, 85, 88, 89 and 90 pin 9, 20, 25, 34, 51 of
of IC1 ES8398. IC1 ES8398.
Refer to wave pattern
Yes Yes
image of Fig. 4-1.
Replace the IC1. Check if the voltage of
BD1604, 1605 is 3.3V.
3 Check if GVDD
Check if the outputs of TAS5342 is measured
of the pin 28, 31, 36 and 39 of No at the pin 1, 22, 23. No
IC27, IC30 and IC31 of the Check if PVDD of TAS5342 is
TAS5342 of the MAIN PCB measured at the pin 26, 27,
are measured. 32, 35, 40, 41.
Refer to wave pattern
image of Fig. 4-2-1
Yes and Fig. 4-2-2. Yes
Replace the TAS5342. Check if the GVDD of pin 1 of
J3 is 12V.
Check if the PVDD of pin 7, 8,
9 of J3 are 22.5V.
B
4-4 Samsung Electronics
Troubleshooting
B
Check the output.
4
Check if the outputs of the JA5
of MAIN PCB are measured.
Refer to wave pattern
image of Fig. 4-3.
Replace the JA5 connectors.
Samsung Electronics 4-5
DB[3] MP
17 DB[2] VGB
146
18 DB[1] VPB
145
19 DB[0] OPEN/VOBS
144
20 VDD OPENSW
143
21 DB[8] CLOSE/VOBS1
142
/16W 22 DB[9] CLOSESW
141
KOHM R120 23 140
DB[10] AMPSTBY
/16W 24 DB[11] LDCO
139
KOHM R121 25 SOUT
138
VD33
/16W 26 VS33 SIN
137
4-6
KOHM R122 27 136
DB[12] VS33
/16W 28 DB[13] VD33
135
KOHM R123 29 134
DB[14] VDD
/16W 30 DB[15] HDMI_CEC
133
IC1
KOHM R124 31 132
VSS VD33
IC36
32 AUX[7] VSS
131
Troubleshooting
33 AUX[6] HDMI_PGND2
130
34 VDD HDMI_PVCC2
129
35 AUX[5] HDMI_AGND
128
36 AUX[4] HDMI_TX2+
127
R125 37 126
AUX[3] HDMI_TX2-
38 VD33 HDMI_AVCC
125
1/16W 39 124
1KOHM VS33 HDMI_TX1+
40 RESET_B HDMI_TX1-
123
41 AUX[2] HDMI_AGND
122
42 AUX[1] HDMI_TX0+
121
43 AUX[0] HDMI_TX0-
120
44 SPI_CS2 HDMI_AVCC
119
10W 45 SPI_CS3 HDMI_TXC+
118
OHM R130 46 117
SPI_CLK HDMI_TXC-
47 VSS HDMI_AGND
116
140 1/16W 48 115
330OHM SPI_DI EXT_SWING
16W 49 SPI_DO HDMI_PVCC1
114
OHM R141 50 113
SPDIF_IN HDMI_PGND1
51 VDD HDMI_OTP_VPP
112
52 SPDIF_OUT VSS_DFG_PLL
111
53 VD33PLL VDD_DFG_PLL
110
54 VS33PLL VD33
109
IC1
VS33
OP[5]
OP[6]
OP[7]
VDD
VSS
VSS
MCLK
VS33
VID_XO
VID_XI
VID_XI
VS33
VD33