Sony SLV-E170EE - Page 104

2. Checking false tracking (Using the tape having the version
No.)
Connect an oscilloscope as follows:
CH1: Connector PB RF teminal for RF
PC board check
CH2: Audio signal output terminal
CH3: Connector RF SWP terminal for
RF PC board check
Note:
In case of 2 phenomenons oscilloscope,
set and connect as follows.
CH1: PB FF terminal
CH2: Audio signal output terminal
External trigger: RF SWP terminal
Trigger slope: +
Set the oscilloscope as follows:
TIME/DIV: 10ms
Trigger source: CH3
Trigger slope: +
Adjust the SWEEP VARIABLE control on the oscilloscope so
Play back alignment tape KRV-52NE
(For NTSC having the version No.)
Set the tracking control at the center
position.
that no signal section of the 5 kHz audio signal (CH2) appears
at a fixed position on the screen as shown in next page.
Not normal and PB RF signal is
advanced. (False tracking in
counterclockwise direction)
Is the phase
relationship between no signal
section of the PB RF signal (CH1) and
no signal section of the 5 kHz audio
signal (CH2) correct?
{Refer to next page.)
Normal
(Correct tracking)
Not normal and PB FF signal Bee
is delayed. (False tracking in ‘
clockwise direction)
Set the oscilloscope as follows:
SWEEP VARIABLE: CAL
TIME/DIV: 2ms
Trigger slope: +
Tum the X-value adjustment screw
in counterclockwise direction for a
maximum RF output.
Continues to the previous step
“1. Adjusting X-value”.
Adjustment has been
completed.
Set the oscilloscope as follows:
SWEEP VARIABLE: CAL
TIME/DIV: 2ms
Trigger slope: +
Tum the X-value adjustment screw
in clockwise direction fora maximum
RF output.
Continues to the previous step
“1. Adjusting X-value”.