JVC LT-42HB1BU Service Manual page 65

MAIN PWB CIRCUIT DIAGRAM (43/46) [SCART1]
5
JP1541
21
GND
20
CVBSI
19
D
C/LUMA
18
GND(R)
17
GND(V)
16
RGBC
SC1_RED
15
R/CHROMA
14
GND(D)
13
GND(R)
12
DATA1
SC1_GREEN
11
GREEN
10
DATA2
9
GND(G)
8
FNS
SC1_BLUE
7
BLUE
SC1_LI
6
AIL
5
GND(B)
4
GND(A)
SC1_LO
3
AOL
SC1_RI
2
AIR
SC1_RO
1
AOR
TSSM-0741-21(STRAIGHT)
8Pin(Function Select/Slow Switching)
9.5V ~ 12V --> 4:3 Mode
4.5V ~ 7V -->16:9 Mode
0V ~ 2V --> TV Mode
16Pin(RGB Control/Fast Blanking)
C
C1541
1V ~ 3V -->RGB Mode
SCART1_LO
0V ~ 0.4V -->CVBS Mode
10uF/16V/MVK/S
MAIN PWB(13/46)
C1551
SCART1_RO
10uF/16V/MVK/S
MAIN PWB(3/46),(4/46),(5/46),(22/46)
+5VSTB
B
R1576
103/1005
R1573
473/1005
1
AC_DETECT
AC ON-> Hi : mute off
AC off -> Low : mute on
MAIN PWB(5/46)
SC_MUTE
R1577
103/1005
Scart mute -> Hi : mute on
Scart mute -> Low : mute off
A
MAIN PWB ASS'Y(43/46)
[SCART1]
HU-71100006
All location are from 1541 to 1580
5
4
RV1541 R1541
SV060305E101N 750/F/1005
R1543 750/F/1005
RV1544 R1546
SV060305E101N 750/F/1005
R1547
R1563
RV1546
303/1005
SV060314B431N
103/1005
U1541
TL072CD
R1551 C1548
683/F/1005 100p/50V/1005
R1552 153/F/1005
2
-
OPAMP_P
3
+
6
-
5
+
R1555 153/F/1005
R1557 C1553
683/F/1005 100p/50V/1005
R1562
R1574 R1575 103/1005 Q1547
103/1005
103/1005 1 MMBT4403
Q1546 Q1548
1
MMBT4401 MMBT4401
SC2_MUTE
4
(No.YA707<Rev.001>)2-93
3
SCART1_CVBS
MAIN PWB(13/46)
SC1_CVBSO
R1545 000/1005 SC1_FB
MAIN PWB(7/46)
SCART1_ID
R1549
SCART Mode Detection
Attenuation = 10K/(10K+30K) = 0.25
+12V
103/1005
+9V1_OPAMP
R1570 000/1005
R1567 OPEN-331/1005
R1569 OPEN-331/1005
C1546 C1547 D1541
104p/50V 106p/25V/3216
OPEN-ZMM5239B(9V1)
SC1_L_OUT_O
1
SC1_R_OUT_O
7
R1560 Q1544
2
KTD1304
102/1005
R1561 Q1545
2
KTD1304
102/1005
MAIN PWB(22/46),(44/46)
3
2-94(No.YA707<Rev.001>)
2
SC1_RED
R1542
RV1542
750/F/1005
SV060305E101N
SC1_GREEN
R1544
RV1543 750/F/1005
SV060305E101N
SC1_BLUE
R1548
750/F/1005
RV1545
SV060305E101N
SC1_LI L1541
CIL21J1R8KNE
RV1547 C1545 C1545 R1550 R1550
SV060314B431N 102p/50V/1005 102p/50V/1005 224/1005 224/1005
SC1_RI L1543
CIL21J1R8KNE
RV1548 R1553
SV060314B431N C1549 224/1005
102p/50V/1005
SC1_LO L1544
CIL21J1R8KNE C1550
10uF/16V/MVK/S
RV1549 R1556
C1552
SV060314B431N 224/1005
102p/50V/1005
SC1_RO L1545
CIL21J1R8KNE C1554
10uF/16V/MVK/S
RV1550 R1559
SV060314B431N 224/1005 C1555
102p/50V/1005
+3V3_A
R1564
4021/F/1005
SC1_FB
3
+ +
2
- -
R1568
102/F/1005
+9V1_OPAMP
R1571
332/F/1005
OPAMP_P
MAIN PWB(44/46)
OPAMP_P
C1557 R1572
47uF/25V/BLA/S 332/F/1005
2
1
SCART1_R
C1542
OPEN-331p/50V/1005
SCART1_G
D
C1543
OPEN-331p/50V/1005
SCART1_B
MAIN PWB(13/46)
C1544
OPEN-331p/50V/1005
SCART1_LI
C
SCART1_RI
R1554 101/1005 SC1_L_OUT_O
R1558 101/1005 SC1_R_OUT_O
B
+3V3_A
C1556
104p/16V/1005
R1565
103/1005
1 MAIN PWB(13/46)
FB1
U1542A
LM393MX
Comparator for trigerring
on 1V Fast Blank Signal
A
1
hb1_main_0612_44/48_0.0