Alignment Procedures Of Mechanism - Hitachi DV-PF7E Service Manual

4-3 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 prop-
erly, 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
Top View
Alignment 1
Bottom View
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 (LM)
Keeping the two triangles pointing at each other,
install the Loading Arm (SP) Assembly so that the last
tooth of the gear meets the most inside teeth of the
Mode Gear. See Fig. AL2.
Loading Arm
(TU) Assembly
Alignment 1
Alignment 3
Alignment 3
Cam Gear (A) (HI), 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) (HI) as shown in Fig. AL3.
Alignment 2
Top View
Fig. AL1
First groove
on the Cam Gear (A)(HI)
4-15
Triangle Marks
Loading Arm
(SP) Assembly
Last Tooth
Alignment 2
Most inside teeth
of Mode Gear (LM)
Mode Gear (LM)
Cam Gear (A)(HI)
Alignment 3
First tooth
Gear on Rack Assembly
Fig. AL2
Fig. AL3