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SERVICE NOTE
[SEMICONDUCTOR
FOR
CORRECTION
LIST
DISPLAY]
Part code and part name of the semiconductor for correction of
the print board is discribed in the space of each print figure. Use
this list when ordering parts.
[SEMICONDUCTOR LOCATION]
In
this
service
manual,
the
mounted
locations
of
the
'semiconductors (IC, transistor, diodes) are indicated in red as
shown below. This enables to find the location on the board
easily when servicing.
QIB7(E-21) QI8B(E-22)
BUFFER
LPF
oft
(COMPONENT SIDE)
[HEAD CLEANING]
After an extended period of use the video image may become
indistinct or may not appear at all during playback of a tape. The
cause of this usually are dirty video heads. For remedy, cleaning
of the heads is required.
Check for Head Clogs During Recording
@ Use a blank tape, record a short section, then press the stop
button to stop.
@ Set to recording mode again.
® If the [ % ] mark is flashing in the viewfinder at this time,
head clogs are occurred.
QI9 SIC -12)
BUFFER
[PARTS
LOCATION
DIAGRAM
RELATED
TO
POWER SUPPLY]
The parts location diagram for the power supply which are often
checked and replaced when repairing the fuse and IC link and so
on. (See pages 108 and 120.)
;
This diagram is useful for repair.
(C-12)
(CONDUCTOR SIDE)
15
16°
17°
18°
19.20 21 22° 23 24° 25
26
27
Check During Playback of a Tape
@ Play back a pre-recorded tape and display the image on a TV
screen.
,
@ If there is no sound and the image is unstable, no image
appears on the screen, or tape transport is unstable, head clogs
are occurred.
Remedy
[Cleaning method using a cleaning tape] _
e Use
the Cleaning
Tape.
(Please
follow
the
instructions attached to the cleaning tape.)
—§—
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