JVC MF-33L User Manual

MF-33L/ML |
Head Replacement and Adjustment
If either of Recording/PB head and Erase head shows low performance caused by wear, broken wire or excessive magnetiza-
tion, it should be replaced. They can be removed by loosening screws with following procedure. After replacement, adjust
azimuth of head.
Azimuth Adjustment
Step
1.
2.
3.
Connect INPUT jack of V.T.V.M. to LINE OUT of
REC/PB socket.
Play back the standard tape (Full Track or JVC Test
Tape VTT658 10kHz) for azimuth (angle adjustment).
Adjust screw Q) so that indication of V.T.V.M. will
become max.
When standard tape for azimuth adjustment is not
available, play a music cassette tape.
Make treble sound optimum with turning the screw
. After this adjustment, the screw @® should be locked
with a bond.
If necessary, adjust playback level, recording bias current,
and trap etc.
Yad
Erase Head
©
© Bae
=
eS
@ ® @ if
Fig. 15
Cassette Deck Circuit Board Adjustment
Item of Adjustment
arWN—
. Dolby Noise Reduction Level
. Level meter
. Playback Gain
. Recording bias current
. Recording current
Equipment and measuring instruments to be used
for adjustment
1.
On aah WN
No. 7020
VTVM (measuring AC in milivolts)
. Oscilloscope
. Oscillator
. Attenuator
. Frequency counter
. Standard tape VTT-664 (1kHz 16mM/mm)
. C-60 Normal sub-standard tape
- 100Q Resistor
R/P
Head wo
Frequency
counter
1002
AC milivoltmeter
Fig. 16

JVC MF-33L Specifications

General

Brand	JVC
Model	MF-33L
Category	Stereo System
Language	English