JVC HX-Z9 Service Manual page 35

4.4 Mechanism section
Item Condition
Head azimuth Test tape
:VT703L (8kHz)
Output terminal
:Speaker out
Tape speed Test tap
:VT712 (3kHz)
Output terminal
:Speaker out or
Headphone out
Item Condition
Tape speed Test tape
diviation at : VT712 (3kHz)
FWD/REV Output terminal
:Speaker out or
Headphone out
Wow & Flutter Test tape
: VT712 (3kHz)
Output terminal
:Speaker out or
Headphone out
Measurement method
(1) Playback the test tape VT703L (8kHz).
(2) Adjust to maximum output level by azimuth ad-
justment screw for forward side and reverse
side.
(3) This adjustment is adjust by adjustment screw
of forward side and adjustment screw of re-
verse side.
Playback the test tape VT712 (3kHz) at end of
forward side,adjust to 2,940~3,90Hz indication of
frequency counter by VR37.
Measurement method
Playback the test tape VT712 (3kHz) at end of
forward and reverse, tape speed deviation should be
less than 6.0Hz.
Playback the test tape VT712 (3kHz) at start of
forward and reverse, Wow & Flutter are should be
less than 0.25%(WRMS).
Adjustment
Ref. value
position
Maximum output Only adjust at
changed head
2,940 ~ 3,090Hz VR37
Adjustment
Ref. value
position
Leass than VR31
6.0Hz
Less than 0.25%
(WRMS)
(No.22066)1-35