Werbung
Verfügbare Sprachen
Verfügbare Sprachen
Hi-Fi AUDIO CIRCUIT ADJUSTMENT
IMPORTANT NOTES ON Hi-Fi SECTION
1. Though adjustment procedures are written for
the left channel, those for the right channel are
basically the same.
Words shown in the bracket "[
right channel only.
2. SERVICING OF THE Hi-Fi MODULE
1) "RECORD MODE"
Under this condition record a stereo broadcast
on tape and adjust control.
2) "PLAYBACK MODE"
Under this condition, play a Hi-Fi tape and
adjust control.
(You can select the audio output channels in
the playback mode by pressing the MENU on
the remoto control or the SET UP button on
the VCR.
Set the desired
Audio
Output
mode
by
pressing the (+) or (—) button.
The Audio Output mode will change in the
normally select Hi-Fi L+R
mode with the
pressing the (+) or (-) button bothe the L
and R audio channels are taken from the Hi-Fi
mode track. The L and R indicators light up on
the Multi-function display in this mode.)
CHECKING OF E-E LEVEL
AC milli-voltmeteror
Oscilloscope
E-E/Record
1kHz, — 3.8dBs (at 21 pin type
jack)
AUDIO OUT jack
— 5.0 + 3dBs (at RCA type jack)
— 3.8 + 3dBs (at 21 pin type
jack)
1" are for the
Measuring
instrument
Input signal
Test point
Specification
1. Feed the audio signal shown
in table to the
AUDIO IN jack.
2. Connect an AC milli-voltmeter or oscilloscope to
the left channel of the AUDIO OUT jack and right
channel of the AUDIO OUT jack.
3. Make
sure
that
the
milli-voltmeter
or
oscilloscope reads specified value.
(Check the level is less than 2dB both Left
channel and Right channels.)
43
Frequency counter
1. Put the unit in A/V input mode. Do not feed any
signal to the VIDEO IN JACK.
(Disconnect
any cable
from
video
input
terminal.)
2. Put the unit in E-E or recording mode and
connect a frequency counter to test
points
TP6301 (Sig.) and TP6302 (GND).
3. Adjust R6310 [R6316] so that the counter reads
specified value.
Measuring
instrument
Input signal
Test point
Controls
Specification
ADJUSTMENT
OF LINEAR
AUDIO
BIAS
CURRENT
Measuring
instrument
Oscilloscope
2. Set the unit in recording mode.
Input signal
Test point
Control
Specification
Werbung
