JVC HR-XVC20US(R) Service Manual page 18

E
HEMATIC DIAGRAM
CR PCB)
NC NC NC
0 0 0 0 4.8 4.8 0 4.9 5.0 4.8 4.8
73 72 71 70 69 68 67 66 65 64 63 62
56 VCC (BACK UP)
55 SEG1
54 Y/C DATA
SYSCON/TIMER/SERVO IC
IC3001
OEC0138A
31 ST SELECT
30 KEY-A
29 KEY-B
12 13 14 15 16 17 18 19 20 21 22 23
1.5 0.4 0 3.1 2.6 5.1 2.6 0 0 2.5 0
NC
C3038
1 F
H
SYSTEM RESET IC
IC3003
PST3231NR
R3049
NC NC
0 0
47K
5 4
NC NC
OUT IN GND
1 2 3
5.0 5.0 0
D3009
1SS133
H PART WAS
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
DIGITAL TESTER
E
2-6
The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only.
Note :
When replacing the parts , refer to the Parts List.
F
RX DRIVE
Q3003
KRA103SRTK
5.2
5.3
C3061
0 4.8 4.8 0
0.1 F
61 60 59 58 57
5.1
0
4.8
5.0 W838
Y/C CLK
5.0
5G/CS/BS LED
5.0
4G/TIME SHIFT LED
5.0
3G/TV/VCR LED
5.0
2G/DUB/REC LED
5.0
1G/VCR/T-REC_LED
0.3
VCR LED
5.1
DVD LED
0
DVD_POWER_CTL
3.3
DVD RESET
4.7
REM IN
5.0
ZERO
NC
R3055
0
POWER ON-L
0
VIDEO_MUTE-H
R3038
0
REC_L/ REEL T
0.1
VSC_L/ REEL S
5.0
POWER FAIL
C3036
5.1
AVCC (BACK UP)
0
TAB SW
0
SERVICE
2.5
AFT S.CURVE
3.7
HiFi ENV
0
5.2
5.2
24 25 26 27 28
2.6 0 0 1.3 1.3
D3007
1SS133
R3010
10K
5.2
0 5.0 4.9
8 7 6 5
1 2 3 4
0 0 0 0
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
F
G
0
0
3.4
RX
RX DRIVE
0
Q3007
KRC103SRTK
SEG_1
W837
Y/C_DATA
Y/C_CLK
5G/CS/BS_LED
4G/VSC_LED
3G/TV/VCR_LED
2G/DUB/REC_LED
1G/VCR/T-REC_LED
VCR_LED
DVD_LED
DVD_POWER_CTL
REM_IN
22K
VCR_POWER_ON- L
VIDEO_MUTE-H
4.7K 1/4W AT+5.2V
REC_L/REEL-T
VSC_L/REEL-S
POWER_FAIL
0.1 F
AT+5V[M-CON]
TAB_SW
SERVICE
NC
TP3001
AFT-S.CURVE
HIFI_ENV.DET
ST_SELECT
KEY-A
KEY-B
AT+5.2V
C3030
1 F
JG3002 JG3003
TX
MD0
RESET
FWE
AT+5V[M-CON]
RECORD LUMINANCE SIGNAL
RECORD COLOR SIGNAL
PLAYBACK LUMINANCE SIGNAL
PLAYBACK COLOR SIGNAL
G
H
TP3002 H.SW
NC
FROM/TO Y/C/AUDIO/CCD/HEAD AMP
DUMMY_V.SYNC
C.SYNC
V.REC_ST-H
C.ROTARY
AUDIO_MUTE-H
CTL-
CTL+
H.AMP_SW
COMP
ENV.DET
H.SW
Y/C_CS
Y/C_DATA
Y/C_CLK
4FSC
FROM/TO TUNER/JACK
RF_CH_SW
SW_V_OUT
AV_SW1
SCL
SDA
AFT-S.CURVE
TV/VCR
VIDEO_OUT
POWER_MUTE-L
VIDEO_MUTE-H
DVD_RESET
SYS_MUTE
FROM/TO HI-FI/DEMODULATOR
V.REC_ST-H
HIFI_ENV.DET
HIFI_H.SW
AUDIO_MUTE-H
SCL
SDA
ST_SELECT
FROM/TO OPERATION1/DISPLAY
DVD_LED
VCR_LED
KEY-A
KEY-B
REM_IN
1G/VCR/T-REC_LED
2G/DUB/REC_LED
3G/TV/VCR_LED
4G/VSC_LED
5G/CS/BS_LED
SEG_1
SEG_2
SEG_3
SEG_4
SEG_5
SEG_6
SEG_7
SEG_8
SEG_9
SEG_10
JG3004 JG3005 JG3006 JG3007 JG3008
PCB010
VMC300
H
8
7
6
5
4
3
2
1