Denon DR-M33HX Service Manual page 12

3. Replacing the Record/Playback Head
* Before replacing, remove the front panel 202.
(1) How to remove the R/P HEAD.
1) Next, Take out the azimuth adjustment NUT 311,
screw 322, and the SPECIAL NUT 311 loosening
them aiternately.
If they are not loosened alternately, the R/P HEAD
base may become warped.
2) By unsoldering the HEAD WIRES on the circuit board
section of the R/P HEAD, the entire R/P HEAD
can be taken off the mechanism unit.
(2) How to assemble the R/P HEAD.
Reverse the above (1) procedures for removing the R/P
HEAD.
* Solder the HEAD WIRES according to the diagram
above.
(2) Adjusting Tilt Angle
1) Set the M-300 Tool Plate on the Mechanism Unit and
then place the M-300 Tool Grip on the R/P Head, and
check the Tilt Annlg h^wRpn M-300 Tool Plate and
M-300 Tool GripT If the M-300 Tool Grip is tilting
toward the rear, loosen Tilt with screw (16). If the
M-300 (Tool Grjp) is tilting toward the front, tighten
it. Adjust the Tilt screw (16) until the M-300 Tool
Grip becomes parallel with the M-300 Tool Plate.
2) If the Tilt Angle is adjusted more than once, height
Adjustment may slip. Always make sure to check
height adjustment. If height has slipped, adjust it
again. After adjustment, fix screw.
Tilt Angle
REC
Yellow
Orange
ZJ
White
(3) Azimuth adjustments
Play back the MTT-114 test tape. Turn the azimuth
adjustment nut and adjust so that A of the resurge wave
form is maximum and B is minimum. After the azimuth
adjustments, re-check the head height with the M-300 to
make sure the height has not deviated.
4. Adjusting the R/P HEAD
(1) Height adjustments (Use the head adjusting jig M-300)
1) Set the M-300 tool plate on the mechanism unit; turn
the height adjustment SCREW 14 and adjust so that
the 3.8 mm measure section of the M-300 (tool grip)
can pass without contacting the tape guide of the
R/P HEAD 9.
2) When adjusting the height, make sure the R/P HEAD is
not tilted by turning the azimuth adjustment nut 311
nut, and checking with your eyes.
* Never allow the M-300 (tool grip) to hit the tape contact
surface of the R/P HEAD strongly. It may scratch the
surface.
* After the adjustments, apply anaerobic adhesive on
the positions indicated in the diagram.
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