Leadless(Chip) Component Identification - Daewoo DVN-14F6N Service Manual

2.LEADLESS (CHIP) COMPONENT IDENTIFICATION
2-1. Check the followings before S. M. D Troubleshooting
• Cracked Chipped component Body
• Cracked Separated Solder Joints
• Peeling end Terminations Fractured Leads
2-2. S.M.D (Surface Mounted Devices) Identification
1) Chip Resistor Identification
* Standard chip Resistor code
X X X
2) Chip Capacitor Identification
There is no identification of chip capacitor
REMARK Leadless (CHIP) components are identified on
schematic by means of "(C)" adjacent to sym-
bol numbers.
CLEANING AND LUBRICATION OF DECK MECANISM IN DVN-14/20F6N
Cleaning and Lubrication
A. cleaning the Tape Transport System
The following parts should be cleaned after every 500
hours of use.
•TENSION POLE
• S-GUIDE POST
• FE HEAD
• S-SLANT POLE
• VIDEO HEAD/DRUM
• T-SLANT POLE
• T-GUIDE ROLLER
• AC HEAD/AE HEAD
• T-CUIDE POST
• CAPSTAN SHAFT
• PINCH ROLLER
NOTE : After cleaning with alcohol, allow the parts to dry
thoroughly before using a cassette tape.
MULTIPLIER (0-9)
2nd SIG. DIGHT (0-9)
1st SIG. DIGHT (1-9)
• Rejection of Solder from copper Pads or Component
• Foreign Matter on Copper Pads
• Sloder Bridges
Examples
= 12x10
1 2 3
4 7 0
= 47x 10°(1) = 47Ω
B. Cleaning the Drive System
The following parts should be cleaned after every 500
hours of use.
• REEL TABLE
• T MAIN BRAKE
• S MAIN BRAKE
• T MAIN BRAKE
• CAPSTAN FLYWHEEL/PULLEY
• REEL PULLEY
C. Lubrication points
The following parts should be cleaned and lubricated
after every 500 hours of use. apply one (1) or two (2)
drops of oil. Refer to the "Replacement Parts List" for the
stock number of the recommended oil.
• S REEL TABLE POST
• T REEL TABLE POST
• IDLER PULLEY
8
3 (1000) = 12000Ω
= 12KΩ