Panasonic AG-1980P Service Manual page 35

Fig.
E10
AUDIO SECTION
3-3-10.
EE LEVEL
ADJ.
TP
AUDIO
OUT
ADJ.
CH
1
:
VR4804
(MAIN C.B.A
:
H-4
)
,
CH
2
:
VR4803
(MAIN
C.B.A.
:
1-3
)
MODE
STOP
INPUT
1
Hz,
-10dB SINE
WAVE
TAPE
M.
EQ
V.T.V.M.
SPEC
-8.0
±
0.5
dBV
1
.
Set
the
REC
LEVEL
VR
is
center position
[
5
].
2.
Adjust
VR4804
so
that
CH
1
(L)
EE
level
is
-8.0
dBV
±
0.5
dBV
and
VR4803
so
that
CH
2 (R)EE
level
is
-8.0
dBV
±
0.5
dBV.
3-3-11.
LEVEL METER
ADJ.
TP AUDIO
OUT
ADJ. VR6501 (TIMER
C.B.A,
:
C-2
)
MODE
STOP
INPUT
1
KHz, -10dB
TAPE
M.
EQ FRONT PANEL
LEVEL
METER
SPEC
0
dB INDICATOR JUST
LIGHT
UP
1
.
Set
the
REC
LEVEL VR
is
center
position
[
5
].
2.
Adjust
VR6501
so
that
0
dB
indicator just
light
up
on
the
front
panel
level meter.
3-3-12.
NORMAL
BIAS
CURRENT
ADJ.
TP
TP4801 (MAIN
C.B.A.
:
F-3
(HOT)
),
TP4802 (MAIN
C.B.A.
:
F-3
(GND)
)
ADJ. VR4802
(MAIN
C.B.A. F-2
)
MODE
REC
INPUT
TAPE
BLANK TAPE
M.
EQ
V.T.V.M.
SPEC
3.0
±
0.1
mVrms
1
.
Connect
the V.T.V.M.
to
TP4801 and TP4802.
2.
Adjust
VR4802
so
that out put
level
is
3.0
±
0.1
mVrms.
3-3-13.
NORMAL
PB LEVEL
ADJ.
TP AUDIO OUT
ADJ. VR4801
(MAIN
C.B.A. G-3)
MODE
REC
=> PLAY
INPUT
1
KHz, -10dB
TAPE BLANK TAPE
M.
EQ
V.T.V.M.
SPEC
-8.0
±
2dB
1
.
Connect
the V.T.V.M.
to
the audio output connector.
2.
Playback
the
just
recorded
portion.
3.
Adjust
VR4801
so
that
output
level
is
-8.0
±
2dB.
3-4