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2-3-3
U27PMAPC
1-A. Preliminary/Final Checking and
Alignment of Tape Path
Purpose:
To make sure that the tape path is well stabilized.
Symptom of Misalignment:
If the tape path is unstable, the tape will be damaged.
Note: Do not use an Alignment Tape for this proce-
dure. If the unit is not correctly aligned, the tape may
be damaged.
1. Playback a blank cassette tape and check to see
that the tape runs without creasing at Guide Rollers
[2] and [3], and at points A and B on the lead sur-
face. (Refer to Fig. M3 and M4.)
2. If creasing is apparent, align the height of the guide
rollers by turning the top of Guide Rollers [2] and
[3] with a Guide Roller Adj. Screwdriver. (Refer to
Fig. M3 and M5.)
3. Check to see that the tape runs without creasing at
Take-up Guide Post [4] or without snaking between
Guide Roller [3] and AC Head. (Fig. M3 and M5)
4. If creasing or snaking is apparent, adjust the Tilt
Adj. Screw of the AC Head. (Fig. M6)
1-B. X Value Alignment
Purpose:
To align the Horizontal Position of the Audio/Control/
Erase Head.
Symptom of Misalignment:
If the Horizontal Position of the Audio/Control/Erase
Head is not properly aligned, maximum envelope can-
not be obtained at the Neutral position of the Tracking
Control Circuit.
1. Connect the oscilloscope to TP301 (C-PB) and
TP501 (CTL) on the Main CBA. Use TP502 (RF-
SW) as a trigger.
2. Playback the Gray Scale of the Alignment Tape
(FL6NS8) and confirm that the PB FM signal is
present.
3. Set the Tracking Control Circuit to the center posi-
tion by pressing CH UP button then “PLAY” button
on the unit. (Refer to note on bottom of page
2-3-4.)
4. Use the X-Value Adj. Screwdriver so that the PB
FM signal at TP301 (C-PB) is maximum. (Fig. M6)
5. Press CH UP button on the unit until the CTL wave-
form has shifted by approx. +2msec. Make sure
that the envelope is simply attenuated (shrinks in
height) during this process so that you will know the
envelope has been at its peak.
Guide Roller [2]
Guide Roller [3]
A
B
Take-up Guide Post [4]
ACE Head
Fig. M3
Lead Surface of Cylinder
Tape
Fig. M4
Guide Roller
Tape
Correct
Incorrect
Take-up Guide
Post
Tape
Fig. M5
Azimuth Adj. Screw
X-Value Adj.
Screwdriver
Tilt Adj. Screw
AC Head
Fig. M6
Summary of Contents for LUX204VR
Page 22: ...Main 1 6 Schematic Diagram 1 8 3 1 8 4 HE410SCM1...
Page 23: ...Main 2 6 Sensor Schematic Diagrams 1 8 5 1 8 6 HE410SCM2...
Page 24: ...Main 3 6 Schematic Diagram 1 8 7 1 8 8 HE410SCM3...
Page 25: ...Main 4 6 Jack Sub Jack Schematic Diagrams 1 8 9 1 8 10 HE410SCM4...
Page 27: ...Main 6 6 Schematic Diagram 1 8 13 1 8 14 HE410SCM6...
Page 28: ...1 8 15 1 8 16 AFV Schematic Diagram HE410SCAFV...
Page 31: ...1 8 21 1 8 22 Jack CBA Top View Jack CBA Bottom View BHE470F01014 C...
Page 55: ...3 1 1 HE410FEX A1X EXPLODED VIEWS Front Panel...
Page 73: ...2003 12 04 LUX204VR HE410ED...