Service manual

44
87109654321
A
B
C
D
E
F
G
H
LC-20B4U-S
LC-20B4U-B
BLOCK DIAGRAM
AGC,AFT,SAW_SW,MODE 1,MODE 2
TV_V
SIF
V1_V
AV1_L,R
SY
SC
TUNER
TU3201
AV1
INPUT
S-VIDEO
INPUT
V2_V IN/OUT
AV2_L,R IN/OUT
Y,PB,PR
AV2_R,L
SC1_OUT_R,L
COMPONENT
INPUT
AV2
INPUT/OUTPUT
DL,DR
(MSP)
IC3304
AUDIO
DECODER
AUDIO IN/OUT
IC3501,Q3501
SWITCH
V_IN/OUT
OFL
OFL REVERSE
Q3601
VIDEO IN/OUT
Q3502-Q3505
SWITCH
Q8451~Q8456
S_IN/OUT
V_IN
VIDEO
SWITCH
IC3401
IC3502
AMP
F
FI
F
FI
SIF AMP
Q3201,Q3202
S
C
SC3403
VPC_Y
VPC_PB,VPC_PR
OFL1
P840 1 P1
17V
P
7
P37 01
P350 2
JACK
J3303
HEADPHONE
P3302P3301
REMOTE
CONTROL
RECEIVER
23V
32V
9V
8V
5V
–11V
4LAMPS
(DOWN)
INVERTER B UNIT
Q6709, Q6710
IC3702
P3604
L_ERR
LAMP
CHECK
DC IN
PA VCC
RXD,TXD
SIG.VCC
PWM
IC3701
INV VCC
P3603
P3602 P3601
6LAMPS
(UP)
T6702, T6703
Q6706, Q6707
T6704, T6705
INVERTER A UNIT
Q6700,Q6701
T6700, T6701
Q6703, Q6704
T6706, T6707
Q6712, Q6713
T6708, T6709
SP-L
SP-R
DC13V
P3501
DC/DC
T3701
34V
9V
5V
–11V
Q3709
Q3705
Q3708
Q3707
SOUND
POWER AMP
IC3305
AUDIO
FILTER
IC3301~IC3303