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PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION
4-20
2. Essential Check and Repair
Recording density of the video is far higher than the audio.
Therefore video parts are very precise so as to allow only
error of 1/1000mm or so in order to maintain compatibility
with other videos.
If one of these parts is polluted or old, same phenomena will
appear as they are damaged.
To maintain clear screen, regular check, replacement of old
and damaged parts and oil supply, etc are essential.
3. Regular Check and Repair
Check and repair schedule is not constant since they vary
depending on method that the consumer uses video and
environment where the video is installed at.
However, for the video used by common household, good
screen will be maintained if regular check and repair per
1,000 hour is performed. The following chart shows relation-
ship between using time and checking time:
4. Tools for Check and Repair
(1) Grease: Floil G-3114 (KANTO) or equivalent grease
(Green)
(2) Grease: Kanto G-754, PL-433 (Yellow)
(3) Alcohol (Isopropyl Alcohol)
(4) Cleaning Patch (cloth)
5. Maintenance Process
5-1) Removal of Foreign Material
(1) Removal of foreign material from video head (Fig. C-9-4)
Firstly try to use a cleaning tape.
(1)
Use a cleaning patch if foreign materials are not removed
with the cleaning tape due to severe dirty of the head.
Soak the cleaning patch in alcohol and put it to the head
tip. Smoothly turn the drum (turning cylinder) to the right
or left (In this case, the cleaning patch must not be
moved vertically).
(1)
After completely drying the head, test the traveling status
of the tape.
(1)
If alcohol (Isopropyl Alcohol) remains at the video head,
the tape may be damaged when this solution touches
with the head surface.
Never use a cloth bar (commercial sale)
(2) Wipe the tape transport system and the drive system
with the cleaning patch soaked in alcohol (Isopropyl
Alcohol) when removing foreign materials from them.
1) The part touched with the traveling tape is called as
tape transport system. The drive system consists of
parts to travel the tape.
(2)
2) Care must be exercised so that unreasonable force
to change the pattern will be applied to the tape trans-
port system during removal of foreign materials.
About
1 year
One hour
Table 1
Two hours
Three hours
Time
Requiring
Checking
Average
hours used
per day
About
18 months
About
3 years
Fig. C-9-4
Drum
(Turning Cylinder)
Head Tip
Soak alcohol
(Isopropyl Alcohol).
Cleaning Patch
(Cloth)
Smoothly turn the drum (turning
cylinder) touching the soft surface
to the head tip surface.
Содержание DVDR3320V Series
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Страница 43: ...3 35 3 36 A B C D E F G H I J K L M N O P Q R S T 2 TUNER CIRCUIT DIAGRAM ...
Страница 44: ...3 37 3 38 A B C D E F G H I J K L M N O P Q R S T 3 A V CIRCUIT DIAGRAM ...
Страница 45: ...3 39 3 40 A B C D E F G H I J K L M N O P Q R S T 4 Hi Fi CIRCUIT DIAGRAM ...
Страница 46: ...3 41 3 42 WAVEFORM 1 2 7 4 3 6 5 A B C D E F G H I J K L M N O P Q R S T 5 SYSTEM CIRCUIT DIAGRAM ...
Страница 47: ...3 43 3 44 A B C D E F G H I J K L M N O P Q R S T 6 SCART CIRCUIT DIAGRAM SCART Model Only ...
Страница 48: ...3 45 3 46 A B C D E F G H I J K L M N O P Q R S T 7 TIMER CIRCUIT DIAGRAM ...
Страница 53: ...3 55 3 56 IC801_TDA9605 IC802_MM1443 IC803_MM1225 IC901_MM1623FX8E ...
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Страница 55: ...3 57 3 58 PRINTED CIRCUIT DIAGRAMS 1 VCR P C BOARD TOP VIEW ...
Страница 56: ...3 59 LOCATION GUIDE ...
Страница 57: ...3 60 LOCATION GUIDE ...
Страница 58: ...3 61 3 62 2 VCR P C BOARD BOTTOM VIEW ...
Страница 59: ...3 63 3 64 3 SMPS P C BOARD ...
Страница 60: ...3 65 3 66 LOCATION GUIDE 4 JACK P C BOARD LOCATION GUIDE ...
Страница 61: ...3 67 3 68 5 KEY TIMER P C BOARD LOCATION GUIDE ...
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Страница 78: ...3 84 3 85 CIRCUIT DIAGRAMS 1 BGA 308P CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Страница 79: ...3 86 3 87 A B C D E F G H I J K L M N O P Q R S T 2 DDR B TO B CONNECTOR CIRCUIT DIAGRAM ...
Страница 80: ...3 88 3 89 A B C D E F G H I J K L M N O P Q R S T 3 POWER FLASH CONNECTOR CIRCUIT DIAGRAM ...
Страница 82: ...3 92 3 93 A B C D E F G H I J K L M N O P Q R S T 5 VIDEO_IN VIDEO_OUT CIRCUIT DIAGRAM ...
Страница 83: ...A B C D E F G H I J K L M N O P Q R S T 3 94 3 95 6 DV1394 HDMI CIRCUIT DIAGRAM ...
Страница 84: ...3 96 3 97 A B C D E F G H I J K L M N O P Q R S T 7 AUDIO IN OUT CIRCUIT DIAGRAM ...
Страница 89: ...3 106 3 107 PRINTED CIRCUIT DIAGRAMS 1 VDR P C BOARD TOP VIEW ...
Страница 90: ...3 108 LOCATION GUIDE ...
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Страница 145: ...5 20 9 LASER TURN ON SIGNAL F LIC502 PIN 52 LDEN DVD LCN201 PIN17 VRDC LCN201PIN 34 ...
Страница 156: ...5 31 30 LD Enable DVD 31 LD Enable CD CD DVD LCN201 PIN 17 LDEN LCN PIN 38 CD DVD LCN201 PIN 17 LDEN LCN102 PIN 38 ...
Страница 160: ...5 35 2 Disc Specification 3 Disc Materials 1 DVD ROM Single Layer Dual Layer ...
Страница 180: ...5 55 5 56 CIRCUIT DIAGRAMS 1 RF CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Страница 181: ...5 57 5 58 2 DSP CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Страница 182: ...5 59 5 60 3 µ COM CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Страница 185: ...5 65 5 66 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD ...
Страница 186: ...5 67 LOCATION GUIDE ...
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