Philips 20MC4304, Service Manual

Page: 282 / 316

2-3-2 MK14NMA_PC
1. Tape Interchangeability Alignment
Note: To do these alignment procedures, make sure that the Tracking Control Circuit is set to the preset position
every time a tape is loaded or unloaded. (Refer to page 2-3-4, procedure 1-C, step 2.)
Equipment required:
Dual Trace Oscilloscope
VHS Alignment Tape (VFMS0001H6)
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 2-3-3) (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 2-3-3)
Loading (Use a blank tape.)
Adjust the envelope. (Page 2-3-4)
Check the envelope.
Adjust the Audio Section.
(Azimuth Alignment) (Page 2-3-5)
Check the audio output.
Check the following:
1. X Value (Page 2-3-3)
2. Envelope (Page 2-3-4)
Adjust the X value and envelope.
Not good
Do the final tape-traveling test to see that
the tape runs normally in play mode with-
out creasing or slacking.
Completion
Not good
OK
OK
OK
Not good
Not good
OK
OK
Flowchart of Alignment for tape traveling
1-A
1-A
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-B
1-C
1-C
1-D
1-D
1-B, 1-C
1-B, 1-C
1-A