- 4-17 -
DECK MECHANISM ADJUSTMENT
Purpose: To obtain compatibility with the other VCR(VCP) Models.
5-2. Confirm that the tape passes smoothly
between the Take-up Guide and Pinch
Roller(using a mirror or the naked eye).
1) After completing Step 5-1.(Preliminary Adjustment), check
that the tape passes around the Take-up Guide and Pinch
Roller without folding or curling at the top or bottom.
(1) If folding or curling is observed at the bottom of the
Take-up Guide then slowly turn the Tilt Adjustment
Screw(C) in the clockwise direction.
(2) If folding or curling is observed at the top of it then
slowly turn the Tilt Adjustment Screw(C) in the
counterclockwise direction.
NOTE:
Check the RF envelope after adjusting the A/C Head, if the
RF waveform differs from Fig. C-5-4, performs Precise
Adjustment to flat the RF waveform.
Test Equipment/ Fixture
Oscilloscope
Alignment Tape(SP)
Screw ) Type 5mm
Connection Point
Audio output jack
Test Conditions
(Mechanism Condition)
Play an Alignment Tape
1KHz, 7KHz Sections
Adjustment Point
Azimuth Adjustment Screw(A)
Height Adjustment Screw(B)
1) Connect the probe of the oscilloscope to Audio Output
Jack.
2) Alternately adjust the Azimuth Adjustment Screw(A) and
the Tilt Adjustment Screw(C) for maximum output of the
1KHz and 7KHz segments, while maintaining the flattest
envelope differential between the two frequencies.
Adjustment Procedure
5-3. Precise Adjustment (Azimuth adjustment)
6. X-Value Adjustment
Fig. C-5-4
1KHZ
Oscilloscope
Alignment Tape(SP only)
Screw ) Type 5mm
CH-1: PB RF Envelope
CH-2: NTSC: SW 30Hz
PAL: SW 25Hz
Head Switching Output
Test Point
RF Envelope Output Test
Point
Test Conditions
(Mechanism Condition)
Play an Alignment Tape
Adjustment Point
Connection Point
Test Equipment/ Fixture
Adjustment Procedure
1) Release the Automatic Tracking to run long enough for
tracking to complete it s cycle.
2) Loosen the Fixed Mounting Screw and move the Base
Assembly A/C Head in the direction as shown in the dia-
gram to find the center of the peak that allows for the max-
imum waveform envelope.
This method should allow the 31 m Head to be centrally
located over the 58 m tape track.
3) Tighten the Base Assembly A/C Head mounting Screw.
7KHZ
A:Maximum
B:Maximum
Left
Right
Groove at the
Base A/C
Height Adjustment Screw(B)
Tilt Adjustment Screw(C)
Azimuth Adjustment
Screw(A)
X-Value Adjustment Hole
Fixed Screw
RF ENVELOPE OUTPUT TEST POINT
OSCILLOSCOPE
HEAD SWITCHING OUTPUT TEST POINT
Connection Diagram
Adjustment Diagram
CH-1 CH-2
Содержание XBS341 Series
Страница 1: ...SERVICE MANUAL MODELS XBS341...
Страница 10: ...2 1 SECTION 2 AUDIO PART...
Страница 12: ...3 2 VCR ELECTRICAL TROULBESHOOTING...
Страница 13: ...3 3...
Страница 27: ...SECTION 4 MECHANSIM OF VCR PART...
Страница 39: ...4 12...
Страница 41: ...4 14...
Страница 51: ...4 24...
Страница 58: ...5 1 DVD ELECTRICAL TROUBLESHOOTING 1 Test debug flow SECTION 5 DVD PART...
Страница 59: ...5 2...
Страница 60: ...5 3...
Страница 61: ...5 4...
Страница 62: ...5 5...
Страница 63: ...5 6...
Страница 65: ...5 8 3 RS232 waveform during procedure Downloading 4 Flash R W enable signal during download Downloading...
Страница 66: ...5 9 2 SDRAM CLOCK 1 MT1379 main clock is at 27MHz X501 3 TRAY OPEN CLOSE SIGNAL 1 Tray open close waveform...
Страница 67: ...5 10 2 Tray close waveform 3 Tray open waveform...
Страница 68: ...5 11 4 SLED CONTROL RELATED SIGNAL NO DISC CONDITION 5 LENS CONTROL RELATED SIGNAL NO DISC CONDITION...
Страница 69: ...5 12 6 LASER POWER CONTROL RELATED SIGNAL NO DISC CONDITION 7 DISC TYPE JUDGEMENT WAVEFORM...
Страница 70: ...5 13...
Страница 71: ...5 14 8 FOCUS ON WAVEFORM...
Страница 72: ...5 15 9 SPINDLE CONTROL WAVEFORM NO DISC CONDITION...
Страница 73: ...5 16 10 TRACKING CONTROL RELATED SIGNAL System checking...
Страница 74: ...5 17 11 RF WAVEFORM 12 MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT ASPDIF...
Страница 75: ...5 18 13 MT1379 VIDEO OUTPUT WAVEFORM 1 Full colorbar signal CVBS 2 Y...
Страница 76: ...5 19 3 C 14 AUDIO OUTPUT FORM AUDIO DAC 1 Audio related Signal...
Страница 77: ...5 20 MEMO...
Страница 80: ...2 2 2 3 BLOCK DIAGRAM...
Страница 81: ...2 4 2 5 AUDIO SHEMATIC DIAGRAMS U COM SCHEMATIC DIAGRAM...
Страница 82: ...2 6 2 7 FUNCTION POWER SCHEMATIC DIAGRAM...
Страница 83: ...2 8 2 9 MAIN AMP SCHEMATIC DIAGRAM...
Страница 84: ...2 10 2 11 WIRING DIAGRAM...
Страница 86: ...2 14 2 15 PRINTED CIRCUIT DIAGRAM MAINAMP FRONT P C BOARD SOLDER SIDE...
Страница 87: ...2 16 2 17 MAINAMP FRONT P C BOARD COMPONENT SIDE...
Страница 88: ...2 18 2 19 FUNCTION POWER P C BOARD SOLDER SIDE...
Страница 89: ...2 20 2 21 FUNCTION POWER P C BOARD COMPONENT SIDE...
Страница 90: ...3 17 3 18 VCR SHEMATIC DIAGRAMS SYSTEM SCHEMATIC DIAGRAM...
Страница 91: ...3 19 3 20 A AUDIO V VIDEO SCHEMATIC DIAGRAM...
Страница 93: ...3 23 3 24 HIFI TUNER SCHEMATIC DIAGRAM...
Страница 94: ...3 25 3 26 A V JACK SCART SCHEMATIC DIAGRAM...
Страница 96: ...3 29 3 30 PRINTED CIRCUIT DIAGRAMS TUNER P C BOARD...
Страница 97: ...3 31 3 32 VCR P C BOARD...
Страница 98: ...3 33 3 34 VCR P C BOARD...
Страница 99: ...5 22 5 21 DVD PART SCHEMATIC DIAGRAMS MPEG SCHEMATIC DIAGRAM...
Страница 100: ...5 23 5 24 SERVO SCHEMATIC DIAGRAM...
Страница 101: ...5 25 5 26 AUDIO SCHEMATIC DIAGRAM...
Страница 102: ...5 27 5 28 INTERFACE SCHEMATIC DIAGRAM...
Страница 103: ...5 29 5 30 VOLTAGE SHEET IC TR...
Страница 104: ...5 31 5 32 PRINTED CIRCUIT DIAGRAM DVD P C BOARD SOLDER SIDE...
Страница 105: ...5 33 5 34 DVD P C BOARD COMPONENT SIDE...
Страница 107: ...MEMO MEMO...
Страница 109: ...MEMO MEMO...
Страница 115: ......