Video Control Section - JVC UX-G68E Service Manual

Video control section

GVA10111-A1(2/2)
R470 200
R480
R471 NI
R472 200 NI 0.4V
R481
R473 NI
R474 200 NI
R475 NI
R476 200
R482
R477 NI
R478 200 NI
R483
R479 NI
NI
DAC3(R/C,Cr) CROUT
VGND
CBOUT
DAC2(Cb,B)
VGND
DAC1(Y,G)
YGOUT
VGND
DAC4(Y/Comp) YOUT
VGND
COUT
DAC5(C)
B2111
D5V
12V
VMUTE L401
VMUTE NI
VIDEORGB
VIDEORGB
VIDEOYC
VIDEOYC
VS1
VS3 VIDEORGB
BLANK-CTL
VIDEOYC
SCART-LIN
AGND
SCART-RIN
0V
Q480
NI
0V
0V
0.4V
Q482
0V
NI
VMUTE
FOR U VERSIONONLY
FOR E VERSION ONLY
VIDEORGB
VMUTE
R430
1K
DIGITAL TRANSISTOR
Rb Rbe
NOTES
Rb KRC102S-X
10K 10K
1. VOLTAGES ARE DC-MEASURED WITH A DIGITAL
Rbe
VOLT METER OR OSCILLOSCOPE WITHOUT INPUT SIGNAL.
CONDITION --- DVD STOP MODE
10K 10K
Rb
KRA102S-X 2. UNLESS OTHERWISE SPECIFIED.
Rbe
ALL RESISTORS ARE 1/4W
OR 0.063W
ALL CAPACITORS ARE CERAMIC CAPACITOR OR
Rb
10K NIL
KRC111S-X
MYLAR CAPACITOR.
Rbe
NI-->NOT INSERT
VIDEO DRIVER
IC450
BH7868FS-X
0.1/16
5V 2.3V
VCC1
C OUT
C451
S1 S-DCOUT
CV OUT 1.4V
S2
C453
2.2V .
C IN CV OUT 1.4V
SAG
1/10
4.5V 0V
L
MUTE1 GND
C454
1.2V CV IN Y OUT 1.3V
H
10/50
R451
10K
0V YC MIX 1.3V
Y OUT SAG
1.5V Y IN . 0V
GND
C455 2V 1.3V C460
Py/G OUT
BIAS
22/50
470/6.3
0V 1.3V
CLAMP
Py/G OUT SAG
C456
1.5V 0V
Py/G IN GND
1/10
2.2V
0V C459
Pb/B OUT
GND
470/6.3
C457 2.1V 2.2V
1/10 Pb/B IN
Pb/B OUT SAG
4.9V 0V
MUTE2 GND
C400
C458
2.1V 2.2V
Pr/R IN Pr/R OUT
1/10
470/6.3
5V 2.2V
C452
VCC2 Pr/R OUT SAG
0.1/16
SCREEN_MODE
4.7/50
Q432
RT1P141C-X
5V 0V
11.1V
11.1V
0V 0V 5V
0V 0V
0V Q433
RT1N141C-X
0V
ALL RESISTANCE VALUES ARE IN OHM(
ALL CAPACITANCE VALUES ARE IN
ALL E.CAPACITORS ARE SHOWN IN THE FORM
OF CAPACITANCE( F)/RATED VOLTAGE (V).
ALL INDUCTANCE VALUES ARE IN
5% CARBON FILM RESISTOR
ALL FERRITE BEADS ARE QQR0621-001Z
5% THICK FILM CHIP RESISTOR
ALL DIODES ARE MA111-X
2-6
R401
75
R402
75
R403
75
C404
R404
75
470/6.3
C406
R406
0.01/50 75
C408
R408
75
470/6.3
ALL EXP EUROPE VERSIONS
B2154 C410
0.01/50
R410 75 J403
C414
R414
QNZ0775-001
20K R411 75
4.7/50
C415
R415
R418
20K
B2155
75 C418
C419
R419
NI
75
C421
R420 75 NI
R422 100
R423 10K
C425
R424
C424 NI
470/6.3 75
EUROPE VERSIONS ONLY
).
F(P=pF).
H(m=mH).
J401
QNN0572-001
GND
2
Y
1
6
Cb
4
5
Cr
3
J402
QNN0557-002
4 3
C Y
2 1
5
7
8
GND
22
1 (AUDIO ROUT)
2 (AUDIO RIN)
3 (AUDIO LOUT)
4
(AUDIO AGND)
5 GND
6 (AUDIO LIN)
7 B
8 FUNCTION
NI
9
GND
10
NC
11 G
12 NC
13 GND
14
GND
15
R/C
16 BLANKING
17 GND
18 GND
19 COMPOSITE/Y
20
NC
21 GND