1-6-7
T6608EA
12. Focus Adjustment
Purpose:
Set the optimum Focus.
Symptom of Misadjustment:
If Focus Adjustment is
incorrect, blurred images are shown on the display.
Note:
Focus VR (FBT) --- H.V./Power Supply CBA
FBT= Fly Back Transformer
1. Operate the unit more than 30 minutes.
2. Face the unit to the East and degauss the CRT
using a Degaussing Coil.
3. Input the monoscope pattern.
4. Adjust the Focus Control on the FBT to obtain clear
picture.
13. Head Switching Position Adjustment
Purpose:
Determine the Head Switching Position dur-
ing Playback.
Symptom of Misadjustment:
May cause Head
Switching Noise or Vertical Jitter in the picture.
Note:
Unit reads Head Switching Position automati-
cally and displays it on the screen (Upper Left Corner).
Manual Adjustment
1. Enter the service mode. (See page 1-6-1.)
2. Playback the test tape (FL6A).
3. Press the number [5] button on the remote control
unit.
4. The Head Switching position will display on the
screen; if adjustment is necessary follow step 4.
7.0H (448
µ
s) is preferable.
5. Press [PROG+/PROG-] buttons on the remote con-
trol unit if necessary. The value will be changed in
0.5H steps up or down. Adjustable range is up to
9.5H. If the value is beyond adjustable range, the
display will change as:
Lower out of range: 0.0H
Upper out of range: -.-H
6. Turn the power off and on again.
Auto Adjustment
1. Load the test tape (FL6A) that have been recorded
the Head Switching Position Value.
2. Enter the service mode.
3. Press [3] button on the remote control unit in the
tape stop mode. The unit playback and adjust the
Head Switching Position automatically.
4. The adjusting report appears on upper left corner
of the screen with blueback.
In case of adjusting correctly: the Head Switching
Position Value recorded in the test tape (FL6A) is
indicated with green.
In case of adjusting incorrectly: "NG" (red) is indi-
cated with ejecting tape.
l
Test point
Adj. Point
Mode
Input
Screen
Focus Control
RF
(or Ext.)
Monoscope
Tape
M. EQ.
Spec.
---
Pattern Generator
See below.
NG
Incorrect
7.0H
Correct
TVCR
TVCR
Fig. 7
Summary of Contents for LT-VHS-36
Page 17: ...1 5 4 T6608DC Fig 4 S 10 S 10 S 10 S 10 Anode Cap 11 CRT CRT CBA...
Page 36: ...Main 1 5 Schematic Diagram 1 8 3 1 8 4 T6608SCM1...
Page 37: ...Main 2 5 Schematic Diagram 1 8 5 1 8 6 T6608SCM2...
Page 38: ...Main 3 5 Schematic Diagram 1 8 7 1 8 8 T6608SCM3...
Page 39: ...Main 4 5 Schematic Diagram 1 8 9 1 8 10 T6608SCM4...
Page 40: ...1 8 11 1 8 12 T6608SCM5 Main 5 5 Schematic Diagram...
Page 42: ...1 8 15 1 8 16 H V Power Supply 2 2 Schematic Diagram T6608SCP2...
Page 43: ...1 8 17 1 8 18 T6608SCCRT CRT Schematic Diagram...
Page 58: ...1 14 3 T6608PEX Packing S3 S6 X3 S2 X1 TAPE S1 FRONT S4 X2 1 X2 2 X2 6...
Page 91: ...2 4 9 Z13PDA Fig DM16 43 41 42 L 13 Fig DM17 44 45 Slide P 9...
Page 98: ...LT VHS 36 T6608FJ 2004 06 03...
