Sony KP-43T90 Service Manual page 2

5-3. BLOCK DIAGRAM (1 OF 8)
TO
A
BOARD
TUNER
BLOCK
TO
A
BOARD
VIDEO
BLOCK
TO A
BOARD
PJED
BLOCK
A
TO A
BOARD ML OUT1
TUNER
HR OUT1
BLOCK
IC002
SYSTEM CONTROL
STUH 1 I-2HSYNC 58
O-SPK MT
MTUH I-HSYNC
2
STU AFT SUBTU AFT
15 I-APROT 22
MTU AFT MAINTU AFT
16
MONO O-MONO
17
SAP
18 O-SAP IO-SDAT 47
SAP IND 43 I-SAPN O-SCLK 49
ST IND 60 I-STEREN
STU AUMT 61 O-2MUTE
MTU AUMT 62 O-MUTE
AGC ATT 51 O-AGC ATT IO-B DAT 48
ANT SW1 52 ANT SW1 O-B CLK 50
ANT SW2 53 ANT SW2
9
I-RESET
11
O-OSC
I-OSC 12
X001
16MHz
MICRO R
32 O-R
MICRO G 33 O-G
MICRO B 34 O-B TO A
BOARD
MICRO I 35 O-I
S OUT
TUNER
OSD YS 36 O-OSDYS
BLOCK
DISP YM 37 O-DISPYM O-SIRCS 63
SWITCH
SBLK 45 O-SBLK 64
I-RMCN
Q024
SWITCH
MBLK 46 O-MBLK
Q007
RM IN
HP 7
I-HP
VP-BUFF
8 I-VP
O-GRAY 23
HP KEY 14
VP-BUFF I-POWERN 44
B INT 6 I-BINTN O-TMRLED 55
MENU 13
21
I-OVP
20
I-OCP
TO A
56
O-RELAY
BOARD
57 O-YUVMT
YUV MT
TUNER
BLOCK
(1/4)(AUDIO, SYSTEM CONTROL)
IC403
D/A CONVERTER
28 IN1 OUT1 21
5 IN2 OUT2 12
17 SCL
18 SDA
L/R MUTE
Q403, 404
PROTECT
Q408-411
SDA
OFF MUTE
SCL
IC004
EEPROM
TO A
5 B DAT BOARD ON MUTE
P-MUTE
TUNER
6 B CLK
BLOCK
4 RESET
IC001
RESET
CN003
11 BCLK
FOR
10 B DAT
CHECK
3 SIRCS
TO A
BOARD
TUNER
BLOCK
TO A
BOARD
GRAY
VIDEO
BLOCK
CN681
8 OVP TO G
G
7 OCP BOARD
4 RELAY CN605
CN002 CN1203
6 KEY KEY 3
7 POWER POWER 4
LED BUFF
8 TIMER LED TIMER LED 5
Q006
TIMER/STANDBY
9 MENU MENU 6
HA
2 SIRCS
(CONTROL SWITCHES)
— 31 —
IC406
L/R AMP
7 IN+(L) OUT(L) 4
11 IN+(R) IN-(L) 8
OUT(R) 2
5 MUTE IN-(R) 10
+11V
Q402
STBY
Q401 +5V
IC404
5
7
6 TO A
R OUT
IC404
BOARD
3 TUNER
1
L OUT BLOCK
2
S1201-1206
CONTROL
SWITCHES
S1207 (MENU SWITCHES)
POWER
D1201
STBY +5V
CN1202 CN1252
1 MENU KEY MENU KEY
CN1291
SIRCS
(REMOTE SENSOR)
KP- 43T90 / 48V90 / 53V90 / 61V90
CN403
1 L
2 E
3 R
4 E
HB
(2/2)
S1251-1255
MENU
1
SWITCHES
2 OUT
D1291
HC
REMOTE SENSOR