LG TL-AT130M, Service Manual, Page: 7 / 80

1-5
No. DESCRIPTION 1500 3000 5000 6000 7500 9000 10000 12000 Test freatures Specification
1 DRUM ASSY RF out level -4dB and below
2 ARM ASSY CLEANER
Wear status
3 MOTOR CAPSTAN (D-35)
W/F(WTD) 0.4% and below
4 BELT CAPSTAN Belt tension
5 BASE ASSY A/C -6dB and below
6 HEAD F/E 45dB min
7 ARM ASSY IDLER
4~12 g
8 HOLDER ASSY PINCH
60~90
9 BAND ASSY TENSION Back Torque 40~70 g
10 HOUSING ASSY CST loading status
11 CAPSTAN SOFT BRAKE Felt wear
12 CLUTCHAY
Torque(Play, Rev)
there shouldn’t be any space
betwween CST and compartment
whether there is
touch noise
40~140gcm, 100~210gcm
1. Drum Ass’y Consists of video head, rotary trans and motor. records video and audio information on
the tape, and play the tape back.
(Audio information is recorded only on the Hi-Fi models)
2. Arm Ass’y Cleaner Cleans video head and rotation head automatically.
4. Motor Capstan Moves the tape with regular speed.
5. Belt Capstan Transfers rotative energy of capstan motor to the driving system.
6. Brake Ass’y Capstan Brakes rotative energy of capstan motor.
7. Base Ass’y A/C Consists of three head.
Audio erase head in the left upper erases audio signal in dubbing.
Audio head in the right upper records and playes the audio signal.
CTL head in the right lower records and detects CTL pulse to control tape speed.
8. Head F/E Is abbreviation of Full Erased Head.
erases the signal recorded on a tape clearly and absorb vibration of tape.
12. Arm Ass’y Idler Is located between T/UP reel and supply reel.
Transfers ratative energy of capstan motor to T/UP reel or supply reel.
13. Holder Ass’y Pinch Sticks a video tape to capstan motor and has the tape played without being
slipped from capstan motor axle.
14. Band Ass’y Tension Has supply reel loosened properly with giving it some tensile force.
15. Arm Ass’y Makes the cassette tape inserted be loaded and ejected precisly and safely.
16. Clutch Ass’y Plays the tape with trasfering rotative energy of capstan motor to idler reel.
SECTION1 SUMMARY
CRITICAL PARTS REPLACING TIME TABLE
Audio and CTL out
level
Whether extraneous
matters come out
Variation amount :
within 40%
The rate of erasing
(1KHz)
The capacity of ldler
for moving
Surrace solidity of
Roller
Reference :
Changing Cleaning Checking
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