Panasonic NV-MV20EG Service Manual page 164

8.5. LUMINANCE & CHROMINANCE/ AUDIO SECTION IN MAIN SCHEMATIC DIAGRA
R :TO POWER SUPPLY/RF SECTION
S :TO SYSTEM CONTROL & SERVO SECTION
I :TO INPUT/OUTPUT SECTION
H
G
S SYS IIC DATA
S MUTE H
S HEAD SW
S MESECAM DET H
S TRACKING ENV.
S FSC
P4002
(TO A/C HEAD)
AUDIO ERASE IN 1
GND 2
AUDIO HEAD (R) 3
AUDIO HEAD (W) 4
CTL HEAD (-) 5
F
CTL HEAD (+) 6
S CTL HEAD (+)
S CTL HEAD (-)
P4001
(TO FULL ERASE HEAD)
FULL ERASE OUT 1
FULL ERASE IN 2
E
R BIAS 5V
R GND
LB4004
R GND (SYS) 0
R GND (A)
R GND (HA)
R GND (V)
R GND (NA)
S BIAS H
D
R I AUDIO OUT
H
S RFC MUTE
P5001
C
(TO CYLINDER UNIT)
SP R 1
SP COM 2
SP L 3
4
5
B
S PAL EP H
S D.A.REC H
R TUNER AUDIO
I AUDIO IN
A
R PS 5V
I VIDEO 5V
NOTE:THE MEASUREMENT MODE OF THE DC VLOLTAGE IN THE BRACKETS( )ON THIS DIAGRAM IS RECORD MODE
WITH PAL COLOUR SIGNAL.
1
VIDEO MAIN SIGNAL PATH IN REC MODE
VIDEO MAIN SIGNAL PATH IN PLAYBACK MODE
AUDIO MAIN SIGNAL PATH IN REC MODE
AUDIO MAIN SIGNAL PATH IN PLAYBACK MODE
A5
A4
A3
A2
A1
R4014
16K
R4020
4700
B1
B2
B3
R4001
3300
B4
C4001
6V100
C3071
0.1
B7
B8
L4501
0
C4516
0.1
2 3
T4001
EQQ7QF024P
C4020
220P
3 4
2
C4021
0.022
1 6
C4022
1500P
C4026 R4019 C4025 5.3
16V10 6800 10V22
5.3 Q4006
(4.4)
2SB710A
(ERASE HEAD
R4018 DRIVE)
4700
0.3
5.3
(4.9)
(0)
L4002
0
QR4005
68u
(4.8)
UN2212
(BIAS H :ON)
QR4502
0
UN2113
QR4507
(BUFFER)
0 -0.4
UN2216
(MUTE)
C4003
4700P
0
R4002
QR4001
100K
0
UN2211
(PAL EP H :ON)
5.0
R4015
0.7
0
QR4002
4700
(-24.5)
(4.8)
UN2111
(D.A.REC H :OFF)
5.3
(0)
R4016
0.7
2200
(-24.0)
THE MEASUREMENT MO
WITH PAL COLOUR SIGN
4
44
R4
22