DECK MECHANISM ADJUSTMENT
4-15
4.Guide Roller Height Adjustment
Adjustment Procedure
1) Confirm if the tape runs along the tape guide line of the
Lower Drum.
2) If the tape runs the bottom of the guide line, turn the
Guide Roller Height Adjustment Screw to clockwise
direction.
3) If it runs the top, turn to counterclockwise direction.
4) Adjust the height of the Guide Roller to be guided to the
guide line of the Lower Drum from the starting and end-
ing point of the Drum.
Purpose: To regulate the height of the tape so that the bottom of the tape runs along the
tape guide line on the Lower Drum.
Test Equipment/ Fixture
• Post Height Adjusting Driver
Test Conditions (Mechanism Condition)
• Play or Review Mode
Adjustment Point
• Guide Roller Height Adjustment
screws on the Supply and Take-Up
Guide Rollers.
Fig. C-4-1
Upper Flange
Guide Roller
Retaining Screw
Guide Roller Height
Adjustment screw
ADJUSTMENT DIAGRAM
Test Equipment/Fixture
• Oscilloscope
• Alignment Tape
• Post Height Adjusting
Driver
Test Equipment Connection Points
• CH-1:PB RF Envelope
• CH-2:NTSC: SW 30Hz
PAL: SW 25Hz
• Head Switching Output
Point
• RF Envelope Output
Point
Test Conditions VCR(VCP) State
• Play an Alignment Tape
Adjustment Point
• Guide Roller Height
Adjustment Screws
Fig. C-4-2
Fig. C-4-3
P3 POST
ADJUSTMENT
P2 POST
ADJUSTMENT
Turn the Roller Guide Height
Adjustment Screw slightly
to flatten the waveform.
Tracking Control at center
RF ENVELOPE OUTPUT TEST POINT
OSCILLOSCOPE
HEAD SWITCHING OUTPUT TEST
POINT
Turn(Move) the Tracking
Control to both directions
4-1. Preliminary Adjustment
4-2. Precise Adjustment
Adjustment Procedure
1) Play an Alignment Tape after connecting the probe of the
Oscilloscope to the RF Envelope Output Test Point and
Head Switching Output Test Point.
2) Tracking Control(in PB Mode) : Center Position(When
this adjustment is performed after the Drum Assembly
has been replaced, set the Tracking Control so that the
RF Output is Maximum).
3) Height Adjustment Screw : Flatten the RF waveform.
(Fig. C-4-2)
4) Turn(Move) the Tracking Control(in PB Mode) clockwise
and counterclockwise.(Fig. C-4-3)
5) Check that any drop of RF Output is uniform at the start
and end of the waveform.
NOTE
If the adjustment is excessive or insufficient the tape will
jam or fold.
Waveform Diagrams
Connection Diagram
Summary of Contents for XBS344 Series
Page 2: ......
Page 10: ...2 3 951 954 960 961 953 957 959 955 956 963 A90 2 Woofer Speaker Section DTE 5105WE...
Page 11: ...2 4 850 852 851A 851 853 854 857 858 A80 3 Speaker Section DTE 550TE...
Page 38: ...3 34 3 35 2 POWER SMPS CIRCUIT DIAGRAM 2 SR13601A R171 4 7K...
Page 39: ...3 36 3 37 3 JACK TUNER CIRCUIT DIAGRAM 03 08 15 SR13605A...
Page 43: ...3 44 3 45 7 KEY CIRCUIT DIAGRAM SR13610A...
Page 46: ...3 50 3 51 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE...
Page 47: ...3 52 3 53 2 TUNER P C BOARD LOCATION GUIDE 3 POWER P C BOARD...
Page 48: ...3 54 3 55 4 KEY 1 LEFT P C BOARD LOCATION GUIDE 5 KEY 2 RIGHT P C BOARD LOCATION GUIDE...
Page 49: ......
Page 69: ...3 75 3 C IC507 PIN 26 FIG 12 3 2 Y IC507 PIN 21 FIG 12 2...
Page 77: ......
Page 79: ...CD DVD LD will not on SR13608A VZ DV51V SANYO 3 85 3 86 2 RF SERVO CIRCUIT DIAGRAM...
Page 80: ...VZ DV51V SANYO TUNER_L TUNER_R 3 87 3 88 3 AUDIO _COM CIRCUIT DIAGRAM DVD AMP...
Page 81: ...VZ DV51V SANYO FRONT_R FRONT_L REAR_R REAR_L 3 89 3 90 4 DIGITAL AMP CIRCUIT DIAGRAM DVD AMP...
Page 82: ...5 PWM CODEIC CIRCUIT DIAGRAM DVD AMP VZ DV51V SANYO 12 288MHz R R L L R L OPTICAL_IN 3 91 3 92...
Page 83: ...6 INTERFACE CIRCUIT DIAGRAM DVD AMP VZ DV51V SANYO 3 93 3 94...
Page 86: ...LOCATION GUIDE LOCATION GUIDE 3 99 3 100 PRINTED CIRCUIT DIAGRAMS 1 DVD AMP P C BOARD...
Page 87: ......
Page 119: ...MEMO...
Page 125: ......
Page 127: ......
Page 159: ......
