Оборудование информацию:

JVC HR-S3900U/U Кассетный видеомагнитофон
Производитель:
JVC
Модель: HR-S3900U/U
Дата: 2001
Категория: Аудио, видео, ТВ, мультимедиа
Группа: Кассетный видеомагнитофон
Описание:
Информация:
                                    

Эти руководства доступны для вышеуказанного оборудования:

JVC -- HR-S3900U/U -- Руководство по техническому обслуживанию
Имя файла: JVC-3023-Manual-Page-1-Picture
Руководство Тип: Руководство по техническому обслуживанию
Страницы: 144
Размер: 6.02 Mbytes (6307840 Bytes)
Язык: английский
Редакция:
Manual-ID/Number: 82848
Дата: March 2001
Качество: Электронный документ, ни сканирование, очень хорошо читается.
Дата публикации:
MD5: ab382987f8bb6275e8d8de9a54489d05
ed2kID: e8862d600b11d92b35a6fd6e023f8d67
Скачиваний: 364 поскольку 10 January 2012
Информация:
1. DISASSEMBLY
1.1 Disassembly flow chart ........................................................ 1-1
1.2 How to read the disassembly and assembly ........................ 1-1
1.3 Disassembly/assembly method ........................................... 1-1
1.4 Service position .................................................................... 1-4
1.4.1 How to set the “Service position” .................................. 1-4
1.5 Mechanism service mode .................................................... 1-4
1.5.1 How to set the “Mechanism service mode” .................. 1-4
1.6 Jig RCU mode ....................................................................... 1-4
1.6.1 Setting the Jig RCU mode ............................................... 1-4
1.6.2 Setting the User RCU mode ............................................ 1-4
1.7 Emergency display function ................................................. 1-5
1.7.1 Displaying the EMG information ..................................... 1-5
1.7.2 Clearing the EMG history ................................................ 1-5
1.7.3 EMG content description ................................................ 1-6
1.7.4 EMG detail information <1> ............................................ 1-7
1.7.5 EMG detail information <2> ............................................ 1-8
2. MECHANISM ADJUSTMENT
2.1 Before starting repair and adjustment ................................... 2-1
2.1.1 Precautions ...................................................................... 2-1
2.1.2 Checking for proper mechanical operations .................... 2-1
2.1.3 Manually removing the cassette tape ............................. 2-1
2.1.4 Jigs and tools required for adjustment ............................ 2-2
2.1.5 Maintenance and inspection ........................................... 2-3
2.2 Replacement of major parts ................................................. 2-6
2.2.1 Before starting disassembling (Phase matching between
mechanical parts) ............................................................ 2-6
2.2.2 How to set the “Mechanism assembling mode” ........... 2-6
2.2.3 Cassette holder assembly ............................................... 2-6
2.2.4 Pinch roller arm assembly ............................................... 2-8
2.2.5 Guide arm assembly and press lever assembly .............. 2-8
2.2.6 A/C head .......................................................................... 2-8
2.2.7 Loading motor ................................................................. 2-8
2.2.8 Capstan motor ................................................................. 2-9
2.2.9 Pole base assembly (supply or take-up side) ................... 2-9
2.2.10 Rotary encoder ........................................................... 2-10
2.2.11 Clutch unit ................................................................... 2-10
2.2.12 Change lever assembly, direct gear, clutch gear and
coupling gear .............................................................. 2-10
2.2.13 Link lever .................................................................... 2-11
2.2.14 Cassette gear, control cam and worm gear ................ 2-11
2.2.15 Control plate ............................................................... 2-11
2.2.16 Loading arm gear (supply or take-up side) and
loading arm gear shaft ................................................ 2-12
2.2.17 Take-up lever, take-up head and control plate guide ... 2-13
2.2.18 Capstan brake assembly ............................................. 2-13
2.2.19 Sub brake assembly (take-up side) ............................. 2-13
2.2.20 Main brake assembly (take-up side), reel disk (take-up side) and
main brake assembly (supply side) ............................................ 2-13
2.2.21 Tension brake assembly, reel disk (supply side) and
tension arm assembly ................................................. 2-14
2.2.22 Idler lever, idler arm assembly .................................... 2-14
2.2.23 Stator assembly .......................................................... 2-14
2.2.24 Rotor assembly ........................................................... 2-14
2.2.25 Upper drum assembly ................................................ 2-15
2.3 Compatibility adjustment .................................................... 2-16
2.3.1 FM waveform linearity .................................................. 2-16
2.3.2 Height and tilt of the A/C head ...................................... 2-17
2.3.3 A/C head phase (X-value) ............................................... 2-17
2.3.4 Standard tracking preset ............................................... 2-18
2.3.5 Tension pole position ..................................................... 2-18
3. ELECTRICAL ADJUSTMENT
3.1 Precaution ............................................................................ 3-1
3.1.1 Required test equipments ............................................... 3-1
3.1.2 Required adjustment tools .............................................. 3-1
3.1.3 Color (colour) bar signal,Color (colour) bar pattern .......... 3-1
3.1.4 Switch settings and standard precautions ...................... 3-1
3.1.5 EVR Adjustment .............................................................. 3-1
3.2 Servo circuit ............................................................................ 3-2
3.2.1 Switching point ................................................................ 3-2
3.2.2 Slow tracking preset ........................................................ 3-2
3.3 Video circuit .......................................................................... 3-2
3.3.1 D/A level .......................................................................... 3-2
3.3.2 EE Y/PB Y (S-VHS/VHS) level .......................................... 3-2
3.3.3 REC color (colour) level ................................................... 3-3
3.3.4 Video EQ (Frequency response) ...................................... 3-3
3.3.5 Auto picture initial setting ................................................ 3-4
3.4 Audio circuit .......................................................................... 3-4
3.4.1 Audio REC FM ................................................................. 3-4
3.5 Demodulator circuit .............................................................. 3-4
3.5.1 Input level ........................................................................ 3-4
3.5.2 Stereo VCO ..................................................................... 3-5
3.5.3 Stereo filter ...................................................................... 3-5
3.5.4 Separation - 1 .................................................................. 3-5
3.5.5 Separation - 2 .................................................................. 3-5
3.5.6 SAP VCO ......................................................................... 3-6
4. CHARTS AND DIAGRAMS
NOTES OF SCHEMATIC DIAGRAM ............................................ 4-1
CIRCUIT BOARD NOTES ............................................................. 4-2
4.1 BOARD INTERCONNECTIONS ............................................ 4-3
4.2 MAIN (VIDEO/AUDIO) SCHEMATIC DIAGRAM ................... 4-5
4.3 MAIN (S-SUB) SCHEMATIC DIAGRAM ............................... 4-7
4.4 MAIN (SYSCON) SCHEMATIC DIAGAM .............................. 4-9
4.5 MAIN (SW.REG) SCHEMATIC DIAGRAM .......................... 4-11
4.6 MAIN (TUNER/DEMOD) SCHEMATIC DIAGRAM ............. 4-13
4.7 MAIN (FRONT) AND ADV. JOG SCHEMATIC DIAGRAMS 4-15
4.8 MAIN (TERMINAL) SCHEMATIC DIAGRAM ...................... 4-17
4.9 MAIN (BS CONNECTION), S-JACK, R.PAUSE AND C.BOX CTL
SCHEMATIC DIAGRAMS .......................................................... 4-19
4.10 2D DIGITAL SCHEMATIC DIAGRAM ............................... 4-21
4.11 DEMODULATOR SCHEMATIC DIAGRAM ...................... 4-23
4.12 MAIN, R.PAUSE AND C.BOX CTL CIRCUIT BOARDS .... 4-25
4.13 2D DIGITAL AND DEMODULATOR CIRCUIT BOARDS .. 4-28
4.14 REMOTE CONTROLLER SCHEMATIC DIAGRAM .......... 4-29
4.15 FDP GRID ASSIGNMENT AND ANODE CONNECTION .. 4-30
4.16 WAVEFORMS .................................................................. 4-31
4.17 VOLTAGE CHARTS .......................................................... 4-33
4.18 CPU PIN FUNCTION ........................................................ 4-34
4.19 SYSTEM CONTROL BLOCK DIAGRAM .......................... 4-35
4.20 VIDEO BLOCK DIAGRAM ............................................... 4-37
4.21 AUDIO BLOCK DIAGRAM ............................................... 4-41
5. PARTS LIST
5.1 PACKING AND ACCESSORY ASSEMBLY  ................ 5-1
5.2 FINAL ASSEMBLY  .................................................... 5-2
5.3 MECHANISM ASSEMBLY  ....................................... 5-4
5.4 ELECTRICAL PARTS LIST .................................................... 5-6
MAIN BOARD ASSEMBLY <03> .............................................. 5-6
2D DIGITAL BOARD ASSEMBLY <05> .................................. 5-12
A/C HEAD BOARD ASSEMBLY <12> ..................................... 5-13
DEMOD BOARD ASSEMBLY <14> ........................................ 5-13
S JACK BOARD ASSEMBLY(S5900U/U(C))<36> .................... 5-13
ADV.JOG BOARD ASSEMBLY <38> ...................................... 5-13
LOADING MOTOR BOARD ASSEMBLY <55> ....................... 5-14
R.PAUSE BOARD ASSEMBLY <91> ....................................... 5-14
C.BOX BOARD ASSEMBLY <92> ........................................... 5-14
JVC-3023-Manual-Page-1-Picture
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