Mechanism Section Adjustment; Reference And Standard Value Of Confirmation Matter Adjustment - JVC UX-P55 Service Manual

3.3 Mechanism section
Item
Mesurement Test tape: VT703L (8kHz)
condition
Measurement output terminal:
Speaker terminal
Mesurement
1.Test tape VT703L (8kHz) is played.
procedure
2.It is adjusted that becomes an output
that both are the maximum on a forward
side and a reverse side with the screw
for the azimuth adjustment.
3.This adjustment is adjusted respectively
with the adjustment screw for the forward
side and the adjustment screw for a
reverse side.
Standard
The maximum output
value
Adjustment Only when the head is exchanged,
position
adjusts.
3.4 Reference and standard value of confirmation matter
Item Forward/reverse tape speed difference
Mesurement
condition
Mesurement Both reverse must forward/reproduce, and
procedure
the speed difference must be 6.0Hz or
less as for finish wrapping of test tape
VT712 (3kHz).
Standard 6.0Hz or less
value
Adjustment VR31
position
Confirmation of angle of head
Test tape: VT712 (3kHz)
Measurement output terminal: Speaker terminal or headphone terminal
Tape speed confirmation
Test tape: VT712 (3kHz)
Measurement output terminal:
Speaker terminal or headphone terminal
Test tape VT712(3kHz) of the forward is
reproduced by finishing rolling , and
adjusted for the display of the frequency
counter to become 2,940-3,090Hz by
VR37.
2,940 ~ 3,090Hz
VR37
Wow & flutter
Both reverse must forward/reproduce,
and each wow & flutter must be 0.25%
(WRMS) or less as for begin to wrap of
test tape VT712 (3kHz).
0.25% or less (WRMS)
(No.22036)1-21