JVC RC-QC7 Service Manual page 36

RC-QC7 serene |
@ Tape Recorder Section
Measurement
Items conditions
Standard Adjusting
© In either case, this adjustment should be
performed in both the forward and reverse
directions with the head azimuth screw.
(Load resistance: 3 Q )
: Headphone terminal
after ending forward winding of the tape.
terminal
: Headphone terminal
: Speaker terminal
Speaker R
(Load resistance: 3 Q )
measurement output
terminal
: Headphone terminal
@ After setting to the double speed motor, confirm
that the frequency counter reading becomes
4,800 +400/- 300Hz when the test tape VTT712
(3kHz) has been played back with the playback
mechanism.
Double tape
speed
difference between both of the mechanisms should
be 6.0Hz or less.
: Speaker terminal
Speaker R
(Load resistance: 3 22)
measurement output
terminal
: Headphone terminal
difference between both of the mechanisms should
be 6.0Hz or less.
: Speaker terminal
Speaker R
(Load resistance: 3 Q )
measurement output
terminal
: Headphone terminal
and recording
and playback
mechanism
speed
When the test tape VTT712 (3kHz) has been played
back with the playback mechanism or recording and
playback mechanism at the beginning of forward
winding, the frequency counter reading of wow &
flutter should be 0.25% or less (WRMS).
0.25% or
less
(WRMS)
Both the playback
and recording &
playback
mechanisms
Test tape
: TMT7036 (10kHz)
Measurement output
terminal
: Headphone terminal
Wow & flutter
36 (No.10036)