JVC LT-26DB1BU/AX Service Manual page 50

MAIN PWB CIRCUIT DIAGRAM (19/28) [SCART1]
5
JP661
21
GND
20
D CVBSI
19
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
C
16Pin(RGB Control/Fast Blanking)
C671
SCART1_LO
1V ~ 3V -->RGB Mode
0V ~ 0.4V -->CVBS Mode 10uF/16V/MVK/S
MAIN PWB (12/28)
C675
SCART1_RO
10uF/16V/MVK/S
B
+5VSTB
R689
473/1005
MAIN PWB
AC_DETECT
(3/28),(5/28),(22/28)
R694
103/1005
MAIN PWB (5/28) Scart_Mute
A
MAIN PWB ASS'Y (19/28)
[SCART1]
HU-71100005
All location are from 661 to 700
5
4
RV661 R662
SV060305E101N 750/F/1005
R664 620/F/1005
R665 000/1005
RV663
SV060305E101N
R668 303/1005
RV665
SV060314B431N
U662
TL072CD
R681 C670
683/F/1005 100p/50V/1005
R682 153/F/1005
2 - -
1
OPAMP_P
3
+ +
6
- -
7
5
+ +
R686 153/F/1005
R687
683/F/1005
C676
100p/50V/1005
R688
R691
103/1005
103/1005
Q663
R690
103/1005 MMBT4403
1
R695
103/1005
Q661
1 1
MMBT4401
Q662
MMBT4401
4
(No.YA698<Rev.001>)2-43
3
SC1_RED
SCART1_CVBS
MAIN PWB (12/28)
SC1_GREEN
SC1_CVBSO
SC1_FB
R666
750/F/1005
SC1_BLUE
SCART1_ID MAIN PWB (7/28)
R669
SCART Mode Detection
103/1005
Attenuation = 10K/(10K+30K) = 0.25
SC1_LI
+12V
L664
BLM18PG300SN1D
C668 C669
104p/50V 106p/25V/3216
SC1_RI
SC1_L_OUT_O
SC1_R_OUT_O
SC1_LO L663
CIL21J1R8KNE
RV669 R683
SV060314B431N 224/1005
SC1_RO L665
CIL21J1R8KNE
RV670 R685
SV060314B431N 224/1005
Q664
2
KTD1304
R692
102/1005
Q665
2
KTD1304
R693
102/1005
MAIN PWB (20/28),(22/28)
Scart2_Mute
C666
47uF/25V/BLA/S
3
2-44(No.YA698<Rev.001>)
2
RV662 R663 C661
SV060305E101N 750/F/1005 OPEN-331p/50V/1005
RV664 R667 C662
SV060305E101N 750/F/1005 OPEN-331p/50V/1005
RV666 R670 C663
SV060305E101N 750/F/1005 OPEN-331p/50V/1005
L661
CIL21J1R8KNE
RV667 C664 R674
SV060314B431N 102p/50V/1005 224/1005
L662
CIL21J1R8KNE
RV668 C665 R677
SV060314B431N 102p/50V/1005 224/1005
C672
102p/50V/1005 R680 101/1005 SC1_L_OUT_O
C667
10uF/16V/MVK/S
C674
102p/50V/1005 R684 101/1005 SC1_R_OUT_O
C673
10uF/16V/MVK/S
+3V3_A
R671
4021/F/1005
SC1_FB
3
+ +
1
2
- -
U661A
R675 C678 LM393MX
162/F/1005 104p/50V
Comparator for trigerring
on 0.94V Fast Blank Signal
+12V
R678
332/F/1005
OPAMP_P
MAIN PWB (20/28)
OPAMP_P
R679
332/F/1005
2
1
SCART1_R
SCART1_G
D
MAIN PWB
SCART1_B
(12/28)
SCART1_LI
C
SCART1_RI
B
+3V3_A
C677
R672 104p/16V/1005
103/1005
FB1 MAIN PWB (12/28)
A
1
lt-26_32db1bu_0514_17/30_0.0