Check Before Starting Repairs - Sony AVD-K150B Service Manual

1. Check before starting repairs

The following faults can be remedied by cleaning and oil-
ing. Check the needed lubrication and the conditions of
cleanliness in the unit.
Check with the customer to find out how often the unit is
used, and then determine that the unit is ready for inspec-
tion and maintenance. Check the following parts.
Phenomenon Inspection
Color beats Dirt on Full-Erase Head
Poor S/N, no color Dirt on Video Head
Vertical or
Dirt on Video Head
Horizontal jitter
Dirt on tape transport system
Low volume,
Dirt on Audio/Control Head
Sound distorted
Tape does not run.
Dirt on Pinch Roller
Tape is slack
In Review and
Clutch Assembly D35
Unloading (off mode),
torque reduced
the tape is rolled up
loosely.
Cleaning Drum and
transport system
NOTE
If locations marked with
a
cleaning, check for wear and replace.
See the EXPLODED VIEWS at the end of this manual as
well as the above illustrations and see the Greasing (Page
45, 46) for the sections to be lubricated and greased.
* No. (1)~(12) Indicates the Tape Path to be traveled from Supply Reel to Take-up Reel.
(3) F/E Head
(5) Drum Assembly
(Video Head)
(4) Base
Assembly P2
(2) Tension Post
(1) Supply Reel
Replace-
ment
a
a
a
a
a
a
Fig. C-9-3
do not operate normally after
Fig. C-9-3 Tape Transport System
AVD-K150B/K150E/K150G/K150N/K150R
F/E Head
Video Head
Fig. C-9-1 Top View
A/C Head
Pinch Roller
Belt Capston
Clutch
Assembly D35
Fig. C-9-2 Bottom View
(6) Base Assembly P3
(7) A/C Head
(8) P4 Post
(10) Pinch Roller
(11) Take-up Guide Post
(9) Capstan Shaft
(12) Take-up Reel
47