Schematic Diagram - Hitachi L42A404 Service Manual

Schematic Diagram

Main Board
715G3269M01001005K
3. Tuner
C201 C202 C203
0.1uF/16V 1uF/16V 0.1uF/16V
TU201 TUNER
1
NC
2
BB
3
C262 0.01uF
AGC
5
NC
6
C206 NC
BT Monitor
8
NC
9
NC
10
NC
11
NC
13
SCL
14
SDA
15
NC
16
IF AGC
17
+B
19
IFD-out1
20
IFD-out2
21
IF Monitor
22
C268 C218 C219
TH1
23
TH2
24
22N 16V 0.1uF/16V 22pF
TH3
25
TH4
21
20
19
18
17
16
15
14
13
12
ENV56S02D8F
11
10
9
8
7
6
5
4
3
2
1
5V :
BB=15mA(MAX)
+B=140mA(MAX)
VB=70mA(MAX)
5VT
1 2
FB201 600 OHM
1 2
FB203 600 OHM
C217 C269
10U 16V 1uF/16V
D3V3
R203 R204
2K2 1/10W 5% 2K2 1/10W 5%
I2C1_SCL
R205 100R 1/10W 5%
I2C1_SCL
I2C1_SDA
R206 100R 1/10W 5%
I2C1_SDA
IF_AGC
IF_AN
IF_AP
C220
22pF
L42A404
Place parts very close to U401
L201
R289
1
0.22uH 5%
10R 1/10W 1%
L203
5,7
R288
5,7
1
0.22uH 5%
10R 1/10W 1%
14
C207 C205
10N 16V
2
C216 0.001uF
L202 C210
0.15uH 5% 82pF R207
C211
2
C209 0.001uF C212
C213
C215
D3V3
R208 33R 1/10W 5%
8 DEMOD_RSTN
R209 4K7 1/10W 5%
R210 NC/20K 1/10W 5%
IF_AGC
R211 2K2 1/10W 5%
C221
1uF/16V Place R211 & C221
close to U401
U401P
Demodulator
SIF_N AF4
SIF_AINN
SIF_P AE4
10N 16V
SIF_AINP
AF2
IF_AINN
IF_AINN
IF_AINP AE2
IF_AINP
AD3
3K9 1/10W 1%
IF_RBIAS
AD2
0402
0.1uF 16V
IF_VINBIAS
AD1
0.1uF 16V 0402
IF_VCM
AF1
0.1uF 16V 0402
IF_VREFN
AE1
0.1uF 16V 0402
IF_VREFP
1 AD8
TP1 DEMOD_CLKO
1 AC7
TP2 MPEG_FAIL
AC8
DMOD_RST_N
AC6
SA_DATA
AE7
PARAM0
PARAM0
RF_AGC AF8
RF_AGC
AF7
IF_AGC
AA5
IF_DVAL_GPIO
ZR39785HGCF
U401H
Guest Bus
U22
GPO/GADR1_CLE
V24
STV2/GCS_N0
W24
CPV2/GDAT6
W25
TP/GDAT5
W23
RVS/GDAT7
W22
OE2/GADR0_ALE
Y 26
STH1/GDAT4
Y 25
STH2/GDAT3
Y 24
CPV/GDAT2
Y 23
OE1/GDAT1
Y 22
STV1/GDAT0
V23
GOE_N
V22
GWE_N
ZR39785HGCF
U401L
No Connect Pins
K22
NC68
ZR39785HGCF