Sharp LC-26AD5E Service Manual ▷ View online
TROUBLSHOOTING GUIDDE
Is there signal at
pins 2, 4 of IC101?
pins 2, 4 of IC101?
Is there color signal
at pins 83 and 84 of
IC803 ?
at pins 83 and 84 of
IC803 ?
Check IC101 and
peripheral circuit.
peripheral circuit.
Check IC803 and peripheral
circuit.
circuit.
Change MAIN PCB.
Yes
No
Yes
No
ON SCREEN DISPLAY DOES
NOT APPEAR
NOT APPEAR
E-6
TROUBLESHOOTING GUIDE
THE SCREEN HAS A VERTICAL
LINE OR A HORIZONTAL LINE.
LINE OR A HORIZONTAL LINE.
Change V2301.
No
Yes
Change IC803.
Is there a normal
waveform at pins 184,
187 and 190 of IC803?
waveform at pins 184,
187 and 190 of IC803?
E-7
TU6002 TUNER
AGC
AGC
4
RF_AGC
SCL
9
IC6001 BUS_SW
SDA
10
15
SCL
F_SCL
1
F_SCL
14
SDA
F_SDA
13
F_SDA
CVBS
15
D_TUNER_SCL
2
D_TUNER_SCL
D_TUNER_SDA
12
D_TUNER_SDA
IF AGC
18
DIF1
19
DIF1
DIF2
20
DIF2
IF_AGC
IF_AGC
IC4201 TUNER_OUT_CVBS_SW
6 TU_TUNER_CVBS_IN
D_TUNER_CVBS_IN
4
D_TUNER_CVBS
2 OUT
J4206
SW_CVBS_(TU/D_TU)
R_OUT
1
SC1_A_OUT_R
L_OUT
3
SC1_A_OUT_L
SCART1_Y_IN
SCART1_Y_IN
L_IN
2
R_IN
6
IC4204 SCART1/2_RGB_SW
21-B_IN
7
8 SCART1_B_IN
SW_SCART_R/C_OUT
3
SW_SCART_R/C
21-G_IN
11
11 SCART1_G_IN
SW_SCART_G_OUT
5
SW_SCART_G
SCART 1
21-R_IN
15
16 SCART1_R_IN
SW_SCART_B_OUT
6
SW_SCART_B
(21-C_IN)
21-Y_IN
16
1 SCART2_R/C_IN
9 SCART2_B_IN
9 SCART2_B_IN
FOR_VCR
8
14 SCART2_G_IN
SCART1_SW
TUNER OUT
19
VIDEO IN
20
IC4203 SCART1/2_AUDIO_Lch_SW
4 SC2_A_IN_L
A_L_OUT
2
SW_A_L
R_OUT
22
SC2_A_OUT(SCALER IC803 21pin)
6 SC1_A_IN_L
L_OUT
24
SC2_A_OUT(SCALER IC803 22pin)
L_IN
23
IC4202 SCART1/2_AUDIO_Rch_SW
R_IN
27
4 SC2_A_IN_R
A_R_OUT
2
SW_A_R
6 SC1_A_IN_R
21-B_IN
28
21-G_IN
32
IC4206 SCART1/2_VIDEO_SW
SCART2
21-R_IN
36
4 SCART2_V_IN
V_OUT
2
SW_SCART_CVBS/Y
(21-C_IN)
6 SCART1_V_IN
21-Y_IN(FB)
37
SCART2_FB(Y_IN)
FOR_VCR
29
SCART2_SW
MONITOR OUT
40
SC2_CVBS_OUT
VIDEO IN
41
J4204 AV_AUDIO_OUT/S-TERMINAL_JACK
S_JACK_C/ S_JACK_Y
CVBS_IN
CVBS_IN
VIDEO_A_L
VIDEO_A_R
VIDEO_A_R
AUDIO_OUT_JACK_L
AUDIO_OUT_JACK_R
AUDIO_OUT_JACK_R
TUNER/SCART1/SCART2/RCA AUDIO OUT BLOCK DIAGRAM
SCALER/SUB
MICON
MICON
SOUND AMP/
HEADPHONE
JACK/COMPONENT
HEADPHONE
JACK/COMPONENT
SCALER/
SUB MICON
SUB MICON
SCALER/
SUB MICON
SUB MICON
F-1
F-2
CP3801
SOUND+B
SOUND+B
1
SOUND+B
SOUND+B
2
IC3801 REG
SW+12V
8
P.CON+9V
SW+12V
9
AT+5V
14
AT+5V
AT+5V
15
P.CON+5V
20
P.CON+5V
P.CON+5V
21
SW+3.3V
22
SW+3.3V
SW+3.3V
23
SW+12V
Q3805/Q3804 SW_TR
P.CON+12V_DTV
Q3202
AT+3.3V
IC3203
IC3205 5V_REG
P.CON+5V
D3804
IC3203 REG
AT+1.8V_1
IC3204 REG
AT+1.8V_2
Q3806 SW
IC3201 3.3V_REG
HDMI+3.3V
Q3205 SW
HDMI_VNREG+5V
POWER/REGULATOR BLOCK DIAGRAM
HDMI_5V
P.CON+5V_DTV
F-3
F-4
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