Hitachi DV-PF33U, Service Manual

Page: 58 / 107

5-14
5-3 ALIGNMENT PROCEDURES OF MECHANISM
The following procedures describe how to align the
individual gears and levers that make up the tape
loading/unloading mechanism. Since information
about the state of the mechanism is provided to the
System Control Circuit only through the Mode Switch,
it is essential that the correct relationship between
individual gears and levers be maintained.
All alignments are to be performed with the mech-
anism in Eject mode,
in the sequence given. Each
procedure assumes that all previous procedures have
been completed.
IMPORTANT:
If any one of these alignments is not performed
properly, even if off by only one tooth, the unit will
unload or stop and it may result in damage to the
mechanical or electrical parts.
Alignment points in Eject Position
Alignment 1
Loading Arm (SP) and (TU) Assembly
Install Loading Arm (SP) and (TU) Assembly so
that their triangle marks point to each other as
shown in Fig. AL2.
Alignment 2
Mode Gear
Keeping the two triangles pointing at each other,
install the Loading Arm (TU) Assembly so that the
last tooth of the gear meets the most inside teeth
of the Mode Gear. See Fig. AL2.
Alignment 3
Cam Gear (A), Rack Assembly
Install the Rack Assembly so that the first tooth on
the gear of the Rack Assembly meets the first
groove on the Cam Gear (A) as shown in Fig. AL3.
Alignment 1
Alignment 2
Top View
Alignment 3
Bottom View
Fig. AL1
Loading Arm
(TU) Assembly
Triangle Marks
Loading Arm
(SP) Assembly
Mode Gear
Last Tooth
Alignment 1
Alignment 2
Most inside teeth
of Mode Gear
Fig. AL2
Cam Gear (A)
First tooth
First groove
on the Cam Gear (A)
Alignment 3
Top View
Gear on Rack Assembly
Fig. AL3