JVC ks-fx834r Service Manual page 13

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Mechanism adjustment section
Item
1. Tape running a) At Forward playmode, using mirror tape, make adjustment
adjustment
b) At Reverse play mode, using mirror tape, make adjustment
c) At Forward / Reverse play mode, make confirmation of no
2. Azimuth a) At forward play mode, make adjustment of peak of Lch / Rch
adjustment
confirmation
b) At Reverse play mode, make adjustment of peak of Lch / Rch
c) With AC volt meter confirm the difference of output for 4ch
d) After operation, make confirmation of Lch / Rch azimuth
TE
L 13942296513
2.Tape Speed and
Wow & Flutter
www
3.Playback
Frequency
response
.
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Adjusting & Confirmation Methods
with Azimuth screw A and Azimuth screw B, without curl of 4
parts of head tape guide.
with Azimuth screw A and Azimuth screw B, without tape
curl of 4 parts of head guide.
tape curl of 4 parts of head tape guide.
output with Azimuth screw A.
* For Oscilloscope litharge corrugation, set 45 as standard.
output with Azimuth screw B.
* For Oscilloscope litharge corrugation, set 45 as standard.
between Lch / Rch at forward play mode and Lch / Rch
Reverse play mode being within 3.0dB.
output being within 1.0dB from adjustment value.
HEAD
OK
HEAD TAPE
1.Check to see if the reading of the frequency counter & W ow
flutter meter is within 2940-3090 Hz( FWD/REV ), and less
than 0.35% ( JIS RMS ).
2.In case of out of specification, adjust the motor with a built-
in volume resistor .
1.Play the test tape ( VT724 : 1kHz ) back and set the volume
position at 2V .
x ao
y
2.Play the test tape ( VT739 )back and confirm 0 3dB at1kHz/
10kHz and -4+2dB at 1kHz/63Hz.
i
3.When 10kHz is out of specification, it will be necessary to
read adjust the azimuth.
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8
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3 6 7 1 3
Tape guide
Tape curl NG
u163
.
2 9 9 4 2 8
Adjust Std. Value
0
Phase
1 5 0 5 8 2 9 9 4
Tape Speed
Built-in
2940-3090Hz
volume resistor
Wow&Flutter
Less than
0.35%
(JIS RMS)
m
Speaker out
1kHz/10kHz
co
: 0dB 3dB,
63Hz/1kHz
: -4dB+2dB,
KS-FX834R
9 9
Azimuth
screw A
Azimuth
screw B
45
2 8 9 9
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