ViewSonic N4261w-1M, Service Manual

Page: 15 / 77

RIGHT
LEFT
TUNER NIM MODULE
(40 PINS)
PHILIPS SEM
TERRESTRIAL INPUT
CABLE INPUT
U1
TUV1236D/FH
M
PEG_D
AT
A6
38
M
PEG_D
AT
A5
37
POW
ER
_R
ST
27
M
PEG_D
AT
A7
39
M
PEG_D
AT
A4
36
M
PEG_D
AT
A3
35
M
PEG_D
AT
A2
34
M
PEG_D
AT
A1
33
M
PEG_D
AT
A0
32
M
PEG_D
AT
A_EN
31
G
ND2
28
M
PEG_ER
R
29
M
PEG_PKT
_SYN
C
30
M
PEG_C
LK
40
G
ND1
18
5V_R
F
_SW
6
IF2
11
IF1
10
C
VBS
14
AF
_M
PX
12
2
ND_
IF_
S
O
UND
15
AS1
26
AS0
25
AGC
_M
ON
IT
OR
7
VT
_M
ON
IT
OR
8
SD
A
20
SC
L
21
NC1
1
NC3
3
NC2
2
NC4
4
NC5
5
5V_T
U
N
ER
9
5V_I
F
13
5V_D
IGI
T
AL
19
2_5V
24
3_3V
23
1_2V
22
R
ESER
VED
16
A
N
T_
CTRL
17
42
42
43
43
44
44
41
41
R9 0
R12
75
T1SND P{12}
TS0DATA[7:0] P{17}
T1CVBS P{8}
TS0VALID P{17}
TS0CLK P{17}
TS0ERR P{17}
TS0SYNC P{17}
TS0DATA0
TS0DATA7
TS0DATA5
TS0DATA6
TS0DATA2
TS0DATA1
TS0DATA4
TS0DATA3
T12NDIF
B.
CATV Input Connector
Κ
Connecting to your coaxial cable from local TV station.
z Tuner TUV1236D receive the signal come from CATV signal Δ Selects desired channel and
demodulate image composite signal (signal mark T1CVBS) by pin 14 of Tuner output to U19 PW328
VDC decoder via C224 and audio SIF signal (signal mark T1SND) by pin 15 of Tuner output to U29
MSP4450G via C396 for demodulating MTS/SAP.
MPEG Processor PWM2030:
When MPEG Transport Stream data input U29 PWM2030 internal decoder Separates MPEG video and
AC3 digital audio .The digital video output from PWM2030 Digital Video Signal Output port (19 Pins) to
U18 PW328 digital input port (port 1) . The digital audio output via I2S bus (MPEG_CL, MPEG_WS,
I2S_DI1) to the externally connected DA converter( U27 MSP4440K) and via SPDIF to optical(P5) &
Coaxial(P4) . Each of these functions was described in more detail in the sections that follow.
Digital Audio Signal output
I2S2WS0
I2S2CK0
I2S2SD0
TP39
Small
1
TP40
Small
1
TP42
Small
1
U29E PWM2030
SIOCLK0
Y3
RXD0
AA2
TXD0
AA3
SIOCLK1
AA1
SMCLK0
AB4
SMIRQ
AD1
SMDATA0
AC1
SMDATA1
AC3
I2S1WSI
A12
I2S1CKI
B12
I2S1SDI
C12
I2S2WSI
D12
I2S2CKI
B11
I2S2SDI
C11
I2S0WSI
B13
I2S0CKI
C13
I2SWSO
A10
I2SCKO
B10
I2SSDO
C10
AOSCKO
B9
I2S0SDI
D13
AOSCKI
A9
RTS0
AA4
CTS0
AB1
SPDIFO
D10
SMCLK1
AC2
RXD1
AB2
TXD1
AB3
R359 100_NC
R293 100
R360 100_NC
R361 100_NC
R294 100
R295 100
R362 100
PWSPDIF P{12}
MPEG_CL
P{9}
MPEG_WS
P{9}
MPEG_DI1
P{9}
ViewSonic Corporation
Confidential - Do Not Copy
N4261w-1M
12
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