Hitachi DV-PF6E, Service Manual

Page: 69 / 123

5-5
5-4-2 Tape Interchangeability Alignment
Note:
To do these alignment procedures, make sure that the
Tracking Control Circuit is set to the center position
every time a tape is loaded or unloaded. (Refer to
page 5-7, procedure 1-C, step 2.)
Equipment required:
Dual Trace Oscilloscope
VHS Alignment Tape (MH-2)
Guide Roller Adj. Screwdriver
Flat Screwdriver (Purchase Locally)
Note: Before starting this Mechanical Alignment, do
all Electrical Adjustment procedures.
Adjust the X Value for maximum envelope.
(Page 5-6) (Use Alignment Tape.)
Check to see that the tape is not creasing
and that there is no slack on the supply
and take-up side Guide Rollers.
(Use a blank tape.)
Adjust the height of the Guide Rollers
(Supply side and take-up side).
(Use a blank tape.) (Page 5-6)
Loading (Use a blank tape.)
Adjust the envelope. (Page 5-7)
Check the envelope.
Adjust the Audio Section.
(Azimuth Alignment) (Page 5-7)
Check the audio output.
Check the following:
1. X Value (Page 5-6)
2. Envelope (Page 5-7)
Adjust the X value and envelope.
No good
Completion
No good
OK
OK
OK
No good
No good
OK
Flowchart of Alignment for tape traveling
1-A
1-A
1-B
1-C
1-C
1-D
1-D
1-B, 1-C
1-B, 1-C
Do the final tape-traveling test to see that
the tape runs normally in play mode with-
out creasing or slacking.
OK
Check to see that the tape is not creasing
and that there is no slack on the REV Post.
(Use a blank tape.)
1-E
1-A