JVC GC-QX3U, Service Manual

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G OUT
G DC OUT
R OUT
R DC DET
B OUT
B DC DET
SIG. C
GND2
TST2
HDO
VFO
XCLR
RPD
V
SS
CKI
CKO
V
DD
V
DD
V
DD
TST11
OSD B
OSD R
OSD G
NC
HCK1
HCK2
VCC1
HST
EN
VCK
VST
RGT
FIL IN
B/B-Y
G/Y
R/R-Y
V SS V SS
+3.0V
+3.0V
S/H
GEN
OSD RGB
S/H
USER-BRIGHT
GAMMAM
CLAMP
POL SW
PLL
COUNTER
V CONTROL
V POSITION
V COUNTER
V SEP
PULSE
ELM
BLK-LIM
SUB-BRIGHT
FILTER
BIAS
LPF
FILTER
GND3
PSIG-
BRT
PSIG-
BRIGHT
POL SW
+12.0V +12.0V
U-GRT
BLKLIM
SIG.C
GND2
COM-DC
HDO GEN
VDO GEN
PHASE
COMPARATOR
HSYNC DET
H SKEW DET
CK
CONTROL
CLK
S/P CONV
REGISTER DAC
MCK
+3.0V
+3.0V
V
SS
V
SS
SUB-BRT R
SUB-BRT B
γ
1
γ
2
WHITLIM
SUB-CONT R
SUB-CONT B
Buf
Buf
Buf
Buf
Buf
CONT
MODE
PIC-G
PIC-F
CONTRAST
TRAP
LPF
CLAMP
MATRIX
B
DL1
HUE
COLOR
DL1 PICTURE
HCK
GEN
HCOUNTER
HPULSE
GEN
HUE
CLAM[P
MODE
H.FILTER SYNC SEP
DA
Buf Buf
REF
GND1 V
SS
CLP
G R
B G R
V
SS
FIL OUT
SYNC IN
SYNC OUT
SYNC/HD
D
A
OUT
REF
F ADJ GND1
VD
DW
N
WIDE
TST1
SCK SEN
SD
A
T
R INJECT
V
SS
V
SS
V
SS
TST10 TST9 TST8 TST7 TST6 TST5 NC POF TST4 GND3 COM V
CC
3
TST3 PSIG OUT PSIG DC DET V
CC
2
1.4.3 IC 7302 (CXA3268AR)
Pin Descriptions
Pin No. Pin Name I/O Description
Input
Res.
1 Vss - GND terminal for digital 3.0V system
2 FIL OUT O H filter output terminal (for internal sync separator use)
3 SYNC IN I Sync input terminal for sync separator circuit
(for internal sync separator use)
4 SYNC OUT O Sync output terminal for sync separator circuit
(for internal sync separator use)
5 CSYNC/HD I CSYNC/horizontal sync signal input terminal
6 DA OUT O DAC output terminal
7 REF O Level shifter circuit reference voltage output terminal for
LCD panel
8 F ADJ O f0 adjust resistor connecting terminal for TRAP
9 GND1 - GND terminal for analog 3.0V system
10 VD I Vertical sync signal input terminal
11 DWN O Up/Down switching signal output terminal
12 WIDE O 16:9 wide display switching pulse output terminal
13 TST1 - Test terminal (Should be opened.)
14 SCK I Serial clock input terminal
15 SEN I Serial load input terminal
16 SDAT I Serial data input terminal
17 R INJECT O Resistor connecting terminal for serial block current control
18 V
SS
- GND terminal for digital 3.0V system
19 V
DD
- Power for digital 3.0V system
20 V
DD
- Power for digital 3.0V system
21 CKO O Oscillation cell output terminal
22 CKI I Oscillation cell input terminal
23 Vss - GND terminal for digital 3.0V system
24 RPD O Phase comparison output terminal
25 XCLR I Capacitor connecting terminal for power-on reset (for
timing generating system)
26 VDO O VDO pulse output terminal
27 HDO O HDO pulse output terminal
28 TST2 - Test terminal (Should be connected to GND.)
29 GND2 - GND terminal for analog 12.0V system
30 SIG.C I DC voltage adjust terminal for R, G, B and PSIG outputs
31 B DC DET O Capacitor connecting terminal for B signal's DC voltage
feedback circuit
32 B OUT O B signal output terminal
33 R DC DET O Capacitor connecting terminal for R signal's DC voltage
feedback circuit
34 R OUT O R signal output terminal
35 G DC DET O Capacitor connecting terminal for G signal's DC voltage
feedback circuit
36 G OUT O G signal output terminal
37 V
CC
2 - Power for analog 12.0V system
38 PSIG DC O Capacitor connecting terminal for G signal's DC voltage
DET feedback circuit
39 PSIG OUT O PSIG output terminal
40 TST3 - Test terminal (Should be opened.)
41 V
CC
3 - Power for analog 12.0V system COM (CS)
42 COM O Common electrode voltage output terminal (CS) for LCD panel
43 GND3 - GND terminal for analog 12.0V system COM (CS)
44 TST4 - Test terminal (Should be opened.)
45 POF O LCD panel power ON/OFF terminal
(Open, if this function is not used.)
46 NC - No internal connection
47 TST5 - Test terminal (Should be connected to GND.)
48 TST6 - Test terminal (Should be connected to GND.)
49 TST7 - Test terminal (Should be opened.)
50 TST8 - Test terminal (Should be opened.)
51 TST9 - Test terminal (Should be opened.)
52 TST10 - Test terminal (Should be opened.)
53 V
SS
- GND terminal for digital 3.0V system
54 V
SS
- GND terminal for digital 3.0V system
55 V
DD
- Power for digital 3.0V system
56 TST11 - Test terminal (Should be connected to GND.)
57 OSD B I OSD B input terminal
58 OSD R I OSD R input terminal
59 OSD G I OSD G input terminal
60 NC - No internal connection
61 HCK1 O H clock pulse 1 output terminal
62 HCK2 O H clock pulse 2 output terminal
63 V
CC
1 - Power for analog 3.0V system
64 HST O H start pulse output terminal
65 EN O EN pulse output terminal
66 VCK O V clock pulse output terminal
67 VST O V start pulse output terminal
68 RGT O Right/Left switching signal output terminal
69 FIL IN I H FILTER input terminal (for internal sync separator use)
70 B/B-Y I B/B-Y signal input terminal
71 G/Y I G/Y signal input terminal
72 R/R-Y I R/R-Y signal input terminal
H
L
* DWN: DOWN SCAN and UP SCAN RGT: RIGHT SCAN and LEFT SCAN
H: Pull-up resistor incorporated L: Pull-down resistor incorporated
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