SECTION1 SUMMARY
CRITICAL PARTS REPLACING TIME TABLE
No. | DESCRIPTION | 1500 | 3000 | 5000 | 6000 | 7500 | 9000 | 10000 | 12000 | Test freatures | Specification | |
1 | DRUM ASSY |
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| RF out level | |
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2 | ARM ASSY CLEANER |
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| Wear status | Whether extraneous | |
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| matters come out | ||||
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3 | MOTOR CAPSTAN |
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| W/F(WTD) | 0.4% and below | |
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4 | BELT CAPSTAN |
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| Belt tension | Variation amount : | |
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| within 40% | ||||
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5 | BASE ASSY A/C |
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| Audio and CTL out | ||
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| level | ||||
6 | HEAD F/E |
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| The rate of erasing | 45dB min |
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| (1KHz) | |||
7 | ARM ASSY IDLER |
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| The capacity of ldler | 4~12 g | |
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| for moving | ||||
8 | HOLDER ASSY PINCH |
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| Surrace solidity of | 60~90 | |
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| Roller | ||||
9 | BAND ASSY TENSION |
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| Back Torque | 40~70 g | |
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10 | HOUSING ASSY |
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| CST loading status | there shouldn’t be any space | |
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| betwween CST and compartment | ||||
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11 | CAPSTAN SOFT BRAKE |
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| Felt wear | whether there is | |
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| touch noise | ||||
12 | CLUTCHAY |
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| Torque(Play, Rev) | 40~140gcm, 100~210gcm |
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Reference : |
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Changing | Cleaning | Checking |
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Notes :
•Check the running path adjustment when you change the itens 1, 3, 5, 6 and 10.
•Check the back tension when you change Band Assy Tension.
CRITICAL PARTS DESCRIPTION
| 1. | Drum Ass’y | Consists of video head, rotary trans and motor. records video and audio information on |
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| the tape, and play the tape back.(Audio information is recorded only on the |
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| 2. | Arm Ass’y Cleaner | Cleans video head and rotation head automatically. |
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| 4. | Motor Capstan | Moves the tape with regular speed. |
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| 5. | Belt Capstan | Transfers rotative energy of capstan motor to the driving system. |
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| 6. | Brake Ass’y Capstan | Brakes rotative energy of capstan motor. |
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| 7. | Base Ass’y A/C | Consists of three head. |
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| Audio erase head in the left upper erases audio signal in dubbing. |
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| Audio head in the right upper records and playes the audio signal. |
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| CTL head in the right lower records and detects CTL pulse to control tape speed. |
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| 8. | Head F/E | Is abbreviation of Full Erased Head. |
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| erases the signal recorded on a tape clearly and absorb vibration of tape. |
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| 12. | Arm Ass’y Idler | Is located between T/UP reel and supply reel. |
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| Transfers ratative energy of capstan motor to T/UP reel or supply reel. |
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| 13. | Holder Ass’y Pinch | Sticks a video tape to capstan motor and has the tape played without being |
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| slipped from capstan motor axle. |
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| 14. | Band Ass’y Tension | Has supply reel loosened properly with giving it some tensile force. |
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| 15. | Arm Ass’y | Makes the cassette tape inserted be loaded and ejected precisly and safely. |
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| 16. | Clutch Ass’y | Plays the tape with trasfering rotative energy of capstan motor to idler reel. |
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