JVC TM-R14U User manual

TM
-
R
14
U
8
CS
SHOP
copy
NOT
FOR
SALE
W
*
SERVICE
MANUAL
14
"
COLOR
VIDEO
MONITOR
TM
-
R
14
U
MODEL
CONTENTS
Safety
Precaution
.
.
.
. .
.
Features
Outline
Functions
How
to
Remove
for
Service
Service
Adjustment
Replacement
Parts
List
. .
Packing Diagram
2
3
3
-
4
5
-
7
8
9
-
11
12
-
23
24
With
SCHEMATIC
DIAGRAM
SPECIFICATIONS
Dimensions
:
36.0
cm
(
W
)
x
41.0
(
D
)
x
32.4
cm
(
H
)
Weight
:
18.4
kg
Color
System
Resolution
.
R
.
G
.
B
Signal
(
analog
)
0.7
Vp
-
p
,
75
12
,
Positive
Bridge
-
Connected
to
R
.
G
.
B
INPUT
.
R
.
G
.
B
INPUT
.
(
BNC
Connector
)
NTSC
400
Lines
or
more
(
at
the
center
)
R
.
G
.
B
OUTPUT
(
BNC
Connector
)
Video
INPUT
(
A
&
B
)
.
.
Comp
.
Video
(
BNC
Connector
)
AC
120
V
,
60
Hz
Power
Input
Power
Consumption
. .
60
W
(
max
,
)
,
45
W
(
avg
.
)
14
'
,
90
°
deflection
Viewable
Picture
Size
.
28.5
cm
(
W
)
x
21.3
cm
(
H
)
.
.
24
kV
±
1
kV
(
at
zero
beam
current
)
.
7
Pin
Cannon
Connector
Type
(
See
page
3
.
)
,
1
Vp
-
p
,
75
12
,
Positive
,
(
Nega
.
Sync
.
)
Picture Tube
•
Video
0.7
Vp
-
p
,
75
12
,
Positive
,
Video
OUTPUT
(
A
/
B
)
.
Bridge
-
Connected
to
Video INPUT
.
(
BNC
Connector
)
High Voltage
Remote
Tally
Sync
.
INPUT
(
ext
.
)
.
.
.
Comp
.
Video
(
BNC
Connector
)
Tube
..
.
Transistor
1
1
Vp
-
p
,
75
12
,
Positive
(
Nega
.
Sync
.
)
73
1
C
8
.
.
Sync
.
GND
System
3
-
GND
System
(
LIVE
:
-
L
,
EARTH
:
i
&
NEUTRAL
:
ihr
)
(
Design
and
specifications
subject
to
change
without
notice
)
1
—
4
Vp
-
p
,
75
12
,
Negative
Bridge
Connected
to
Sync
.
INPUT
Sync
.
OUTPUT
No
.
5741
Aug
.
1985

TM
-
R
14
U
SAFETY
PRECAUTION
(
1
}
Dielectric
Strength
Test
The
isolation
between the
AC
primary
circuit
and
all
metal
parts
exposed
to
the
user
,
particularly
any
exposed
metal
part
having
a
return
path
to
the
chassis
should
withstand
a
voltage
of
1
,
100
V
AC
(
r
.
m
.
s
.
)
for
a
period
of
one
second
.
Withstand
a
voltage
of
1
,
100
V
AC
(
r
.
m
.
s
.
)
to
an
appliance
rated
up
to
120
V
,
and
3
,
000
V
AC
(
r
.
m
.
s
.
)
to
an
appliance
rated
200
V
or
more
,
for
a
period
of
one
second
.
This
method
of
test
requires
a
test
equipment
not
generally
found
in
the
service trade
.
(
2
)
Leakage
Current Check
Plug
the
AC
line cord
directly
into
the
AC
outlet
(
do
not
use
a
line
isolation
transformer
during
this
check
.
)
.
Using
a
“
Leakage
Current
Tester
"
,
measure
the
leakage
current
from
each
exposed
metal
part
of
the cabinet
,
particularly
any
exposed
metal
part
having
a
return
path
to
the chassis
,
to
a
known
good
earth
ground
(
water
pipe
,
etc
.
)
.
Any
leakage
current
must
not
exceed
0.5
mA
AC
(
r
.
m
.
s
.
)
.
Alternate
Check
Method
Plug
the
AC
line
cord
directly
into
the
AC
outlet
(
do
not
use a
line
isolation
transformer
during
this
check
.
)
.
Use
an
AC
voltmeter
having
,
1
,
000
ohms
per
volt
or
more
sensitivity
in
the
following
manner
.
Connect
a
1
,
50012 10
W
resistor
paralleled
by
a
0.15
juF
AC
-
type
capacitor
between
an
exposed
metal
part
and
a
known
good
earth
ground
(
water
pipe
,
etc
.
)
.
Measure
the
AC
voltage
across
the
resistor
with
the
AC
voltmeter
.
Move
the
resistor
connection
to
each
exposed
metal
part
,
particularly
any
exposed
metal
part
having
a
return
path
to
the
chassis
,
and
measure
the
AC
voltage
across
the
resistor
.
Now
,
reverse
the
plug
in
the
AC
outlet and
repeat
each
measurement
.
Any
voltage
measured
must not
exceed
0.35
V
AC
(
r
.
m
.
s
.
)
.
This
corresponds
to
0.5
mA
AC
(
r
.
m
.
s
.
)
.
1
.
The
design
of
this
product
contains
special
hardware
,
many
circuits
and
components
specially
for
safety
purposes
.
For continued
protection
,
no
changes
should be
made
to
the
original design
unless
authorized
in
writing
by
the
manufacturer
.
Replacement
parts
must
be
identical
to
those
used
in
the
original
circuits
.
Service
should
be
performed
by
qualified
personnel
only
.
2
.
Alterations
of
the
design
or
circuitry
of
receiver
should
‘
not
be
made
.
Any design
alterations
or
additions
will
void
the
manu
-
facturer
'
s
warranty
and
will
further
relieve
the
manufacturer
of
responsibility
for
personal
injury
or
property
damage
resulting
therefrom
.
3
.
Many
electrical
and
mechanical
parts
in
television
sets
have
special
safety
-
related
characteristics
.
These
characteristics
are
often
not
evident
from
visual
inspection
nor
can
*
the
protection
afforded
by
them
necessarily
be obtained
by
using
replacement
components
rated
for
higher
voltage
,
wattage
,
etc
.
Replacement
parts
which have
these
special
safety
characteristics
are
identified
in
the
parts
list
of
Service
manual
.
Electrical
components
having
such
features
are
identified
by
shading
on
the
schematics
and
by
(
A
)
on
the
parts
list
in
Service
manual
.
The
use
of
a
sub
-
stitute
replacement
which
does
not
have the
same
safety
char
-
acteristics
as
the
recommended
replacement
part
shown
in
the
parts
list
in
Service
manual
many
create
shock
,
fire
,
or
other
hazards
.
4
.
Use
isolation
transformer
when
hot
chassis
.
The
chassis
and
any
sub
-
chassis
contrained
in
some
product
are
connected
to
one
side
of
the
AC
power
line
.
An
isolation
trans
-
former of
adequate
capacity
should
be
inserted
between
the
pro
-
duct and
the
AC
power
supply
point
while
performing
any
service
on
some
product
when
the
HOT
chassis
is
exposed
.
5
.
Don
'
t
short
between
the
LIVE
side
ground
and
NEUTRAL
side
grounding
or
EARTH
side
ground
when
repairing
.
Some
model
'
s
power
circuit
is
partly
different
in
the
GND
.
The
difference of
the
GND
is shown
by
the
LIVE
(
_
L
.
)
side
GND
,
the NEUTRAL
(
73
Ip
)
side
GND
and
EARTH
(
^
)
side
GND
.
Don
'
t
short between the
LIVE
side
GND
and
NEUTRAL
side
GND
or
EARTH
side
GND
and
never
measure
with
a
measuring
apparatus
(
oscilloscope
etc
.
)
the
LIVE
side
GND
and NEUTRAL
side
GND
or
EARTH
side
GND
at
the
same
time
.
If
above
note
will
not
be
kept
,
a
fuse
or
any
parts
will
be
broken
.
6
.
If
any
repair
has been
made
to
the
chassis
,
it
is
recommended
that
the
B
*
setting
should
be
checked
or
adjusted
(
See
ADJUST
-
MENT
OF
Bj
VOLTAGE
)
.
7
.
The
high
voltage
applied
to
the
picture
tube
must
conform
with
that
specified
in
Service
manual
.
Excessive
high voltage
can cause
an
increase
in
X
-
Ray
emission
,
arcing
and
possible
component
damage
,
therefore
operation
under excessive
high
voltage
condi
-
tions should
be
kept
to
a
minimum
,
or
should
be
prevented
.
If
severe
arcing
occurs
,
remove
the
AC
power
immediately
and
determine
the
cause
by
visual
inspection
(
incorrect
installation
,
cracked
or
melted
high
voltage
harness
,
poor
soldering
,
etc
.
)
.
To
maintain the
proper
minimum
level
of
soft
X
-
Ray
emission
,
components
in
the
high
voltage
circuitry including
the
picture
tube
must
be
the
exact
replacements
or
alternatives
approvided
by
the
manufacturer of
the
complete
product
.
8
.
Do
not
check
high
voltage
by
drawing
an arc
.
Use
a
high
voltage
meter
or
a
high
voltage
probe
with
a
VTVM
.
Discharge
the
picture
tube
before
attempting
meter
connection
,
by
connecting
a
clip
lead
to
the
ground
frame
and
connecting
the
other
end
of
the lead
through
a
I
0
kl
2
2
W
resistor
to
the
anode
button
.
9
.
When
service
is
required
,
observe
the
original
lead dress
.
Extra
precaution
should be
given
to
assure
correct
lead
dress
in
the
high
voltage
circuit
area
.
Where
a
short
circuit has occurred
,
those
components
that
indicate
evidence
of
overheating
should
be
replaced
.
Always
use
the
manufacturer
'
s
replacement
com
-
ponents
.
10
.
Isolation
Check
(
Safety
for
Electrical
Shock
Hazard
)
After
re
-
assembling
the
product
,
always
perform
an
isolation
check
on
the
exposed
metal
parts
of
the
cabinet
(
antenna
terminals
,
channel
selector
knobs
,
metal
cabinet
,
screwheads
,
earphone
jack
,
control
shafts
,
etc
.
)
to
be
sure
the
product
is
safe
to
operate
without
danger
of
electrical shock
.
AC
VOLTMETER
(
HAVING
1000
H
/
V
,
OR
MORE
SENSITIVITY
)
CQ
0.15
/
uF
AC
-
TYPE
O
^
PLACE
THIS
PROBE
ON
EACH
EXPOSED
METAL PART
—
wv
—
*
1500
S
2
10
W
GOOD
EARTH
GROUND
11
.
High voltage
hold
down
circuit
check
.
After
repair
of
the
high
voltage
hold down
circuit
,
this
circuit
shall
be
checked
to
operate
correctly
.
See
item
“
How
to
check the
high
voltage
hold
down circuit
"
.
2
(
No
.
5741
)

TM
-
R
14
U
FEATURES
With
two
way
VIDEO
INPUT
terminals
(
Bridge
Termination
)
Two
video
input
terminals
are
equipped
and
bridged
respectively
.
Change
-
over
of
the
two
input
terminals
is
performed
by
the
front
input
switch
for
changing
IC
.
With
EXT
.
SYNC
.
INPUT
terminal
(
Bridge
Termination
)
Ext
.
sync
,
input
terminal
is
equipped
and
bridged
so
that
this
set
can
monitor
a
no
-
sync
,
video
signal
.
When
choosing
int
.
sync
,
or
ext
.
sync
.
,
change
-
over
IC
by
the
front
sync
,
switch
.
With
REMOTE
/
TALLY
terminal
Tally
lamp
,
sync
.
(
INT
/
EXT
.
)
,
scan
(
WIDE
/
NARR
)
,
color
(
ON
/
OFF
)
,
input
(
A
/
B
)
possible
operation
COMB
FILTER
equipped
for
reproducing
the
high
-
resolution
screen
.
UNDER
SCAN
circuit
equipped
Switch
for
overscan
screen
or
underscan
screen
changeover
is
used
to
check
screen
frame
or
screen
square
.
Use
of
a
metal
cabinet
unaffected
by
magnetism
or
other
appliance
.
Blue
check
switch
equipped
for
producing
a
blue
signal
color
on
the
screen
.
Use
of
a
SEMI
-
HIGH
RESOLUTION
PICTURE
TUBE
functioning
or
monitor
.
With
R
/
G
/
B
terminals
(
analog
)
.
Adopts
3
-
terminals
power
supply
cord
.
Adopts
3
-
GND
System
(
LIVE
:
_
L
,
NEUTRAL
:
-
jbr
&
EARTH
:
)
.
OUTLINE
BLUE
CHECK
SWITCH
Switching
on
the
front
Blue
Check
switch
increases
col
-
lector
voltage
of
R
.
or
G
.
output
transistor
respectively
and
causes
the
CRT
to
cut
off
so
that
the
screen
becomes
a
blue
single
color
.
Color
and
tint
adjustments
can
be
performed
correctly
by
inputting
a
color
-
bar
signal
(
in
order
of
brightness
)
and
displaying
a
blue
signal
.
REMOTE
/
TALLY
(
7
P
CANNON
TYPE
)
The
change
-
over
of
TALLY
LAMP
(
ON
/
OFF
)
,
SYNC
(
INT
/
EXT
)
,
SCAN
(
WIDE
/
NARR
)
,
COLOR
(
ON
/
OFF
)
and
INPUT
(
A
/
B
)
is
possible
by
a
remote
control
.
*
When
lighting
a
tally
lamp
with
an
external
power
source
,
change
a
tally
lamp
switch
within
control
PC
Board
from
INT
side
into
EXT
side
.
EXAMPLE
CIRCUIT
SCAN
CIRCUIT
Setting
the
front
SCAN
switch
to
NARR
side
causes
the
H
.
Height
:
Relay
changes
to
OFF
,
coils
are
connected
in
series
,
and
so
inductance
increases
.
Accordingly
,
electric
current
which
flows
through
a
deflection
coil
decreases
and
amplitude
becomes
smaller
.
V
.
Height
:
Switching
transistor
is
OFF
,
NARR
V
.
HEIGHT
VR
is
connected
to
V
.
HEIGHT
VR
in
series
,
negative
feedback
amount
increases
,
and
V
.
Height
becomes
smaller
.
Rotating
VR
clockwise
decreases
negative
feedback
amount
and
makes
V
.
Height
larger
.
Rotating
VR
counter
-
clockwise
makes
V
.
Height
smaller
.
f
B
r
-
_
1
EXT
INT
o
1
Tally
Switch
EXT
24
V
TALLY
o
INT
Tally
Lamp
TALLY
O
.
SYNC
INT
—
EXT
TALLY
/
REMOTE
TERMINAL
ACC
(
ON
/
OFF
)
SWITCH
ON
/
OFF
Switch
for
ACC
circuit
.
This
switch
has
been
turned
ON
at
the
factory
(
ACC
circuit
functions
)
,
but
turn
this
switch
off
when
ACC
circuit
need
not
be
actuated
.
For
reproducing
input
video
signals
more
faithfully
,
ACC
circuit
can
be
switched
off
.
*
As
for
the
location
of
ACC
(
ON
/
OFF
)
switch
,
refer
to
ALIGNMENT
LOCATION
on
schematic
diagram
.
WIDE
-
—
*
NARR
O
SCAN
>
to
SWITCH
Ol
COLOR
ON
-
—
OFF
0
^
0
|
-
~
Oj
INPUT
>
A
-
—
B
OPEN
GND
(
No
.
5741
)
3

TM
-
R
14
U
BLOCK
DIAGRAM
i
(
D
®
COMB
FILTER
CIRCUIT
INPUT
SW
IC
0
—
9
®
®
i
—
fr
WAVE
FORMER
SYNC
.
SEPA
.
CIRCUIT
11
&
BUFFER
CHROMA
&
VIDEO
AMP
I
.
C
'
r
I
'
H
.
&
V
CIRCUIT
*
R
.
AMP
CIRCUIT
i
R
.
G
.
B
OUTPUT
CIRCUIT
®
CRT
SWITCH
DRIVE
R
.
G
.
B
(
7
)
1
AMP
®
®
G
.
AMP
CIRCUIT
&
(
Y
)
@
®
*
B
.
AMP
CIRCUIT
AMP
.
©
I
.
C
©
TRANSFORMER
SWITCHING
RECT
*
i
*
§
IC
501
n
B
ADJ
*
IC
POWER
CONTROL
POWER
DRIVE
POWER
OUT
DR
L
POWER
TRANSF
AC
POWER
SOURCE
4
(
No
.
5741
)

TM
-
R
14
U
FUNCTIONS
FRONT
VIEW
(
Z
)
(
D
(
D
(
S
)
(
Q
)
®
©
@
©
©
@
©
©
®
INPUT
A
/
B
SELECT
BUTTON
*
When
exercising
remote
control
with
the
rear
remote
terminal
,
set
to
INPUT
A
.
®
SYNC
.
,
SELECT
(
INT
/
EXT
)
BUTTON
Switch
for
INT
-
SYNC
.
or
EXT
.
-
SYNC
.
Change
-
over
.
*
When
exercising
remote
control
with
the
rear
remote
terminal
,
set
to
I NT
.
(
0
)
NOTCH
(
ON
/
OFF
)
BUTTON
ON
/
OFF
switch
for
NOTCH
circuit
functions
to
de
-
crease
dot
obstacles
on
the
top
and
button
outline
part
of
picture
.
This
switch
,
however
,
decreases resolution
,
and
so
switch
OFF
if
unnecessary
.
@
COLOR
(
ON
/
OFF
)
BUTTON
Switch
for
color
screen
or
monochrome
screen
change
-
over
is
used
to
check
white balance
or
adjustment
.
®
V
.
HOLD
CONTROL KNOB
(
2
)
TINT
CONTROL
KNOB
(
3
)
COLOR
CONTROL KNOB
(
4
)
BRIGHT
CONTROL
KNOB
(
5
)
CONTRAST
CONTROL KNOB
(
D
APERTURE
CONTROL KNOB
Turn
APERTURE
control
knob
that
the
picture
turns
soft
and
clear
.
(
7
)
~
(
Q
)
SUB
CONTROL
VR
The standard
state
of
each
control knob
can
be
preset
with
each
SUB
-
VRs
.
First
,
set
each control
knob
to
the
click
position
.
Next
,
rotate
each
SUB
-
VRs
with
a
thin
screw
driver
and
adjust
it
to
obtain
the
most
suitable
state
.
(
7
)
SUB
-
TINT
CONTROL
VR
(
8
)
SUB
-
COLOR
CONTROL
VR
(
4
)
SUB
-
BRIGHT
CONTROL
VR
©
SUB
-
CONTRAST
CONTROL
VR
(
Q
)
SUB
-
APERTURE
CONTROL
VR
\
(
J
(
No
.
5741
)
5

TM
-
R
14
U
(
Q
)
DEGAUSS
BUTTON
Switch
for
degaussing
picture
tube
.
To
deguss
,
push
this
switch
for
ten
seconds
,
when
degaussing
over
again
,
push
it
at
intervals
'
of
ten
minutes
.
®
POWER
BUTTON
/
POWER
IND
.
Switch for
power
of
this
set
.
Power
is switched
ON
,
and then
power
indicator
lamp
is
lighted
.
@
TALLY
LAMP
SWITCH
Lighting by
internal
power
source
(
when
shipping
)
short
between
pin
(
2
)
and
pin
(
3
)
of
TALLY
terminal
.
Lighting
by
External
power
source
.
(
1
)
First
,
set
TALLY
switch
within
the
set to
EXT
.
side
.
(
2
)
Give
DC
24
V
between
pin
(
T
)
and
pin
(
5
)
of
TALLY
terminal
.
#
BLUE
CHECK
BUTTON
Switch
for
ordinary
screen
or
blue
monochrome
screen
changeover
is
used
to
adjust
TINT
and
COLOR
easily
.
(
How
to
adjust
)
(
1
)
First
,
input
color
bar
signal
and
make blue
mono
-
chrome
screen
.
(
2
)
Adjust
TINT
and
COLOR
control knob
alter
-
nately
so
that
each
blue band
is
same
in
density
and
brightness
;
and then
TINT
and
COLOR
is
adjusted
correctly
.
@
SCAN
(
WIDE
/
NARR
)
BUTTON
Switch
for
overscan
screen or
underscan
screen
change
-
over
is used
to
check
screen
frame
or
screen
square
.
6
(
No
.
5741
)

TM
-
R
14
U
(
T
)
VIDEO
(
A
/
B
)
TERMINALS
&
75
£
2
SWITCH
The
Terminals
for
monitoring by
connecting
the video
output
from
a
video
camera
,
VCR
or
other
equipment
.
A
>
75
n
OPEN
When
the
bridge
output
is
NOT
required
.
To
obtain
the
bridge
output
See
:
—
Page
9
Fig
.
F
.
(
D
SYNC
.
TERMINALS
75
S
2
SWITCH
INPUT
terminal
(
?
)
:
Comp
.
sync
,
signal
or
Comp
,
video
signal
OUTPUT
terminal
:
Bridge
output
terminal
(
D
SKEW SWITCH
Switch
for
the
changeover
in
the
fixed
number
during
AFC
of
horizontal
deflection
circuit
.
Compensates
skewed
display
of
the
upper
part
on
the
screen
,
caused
by
VCR
play
back
tape
deterioration
or
other
factors
.
<
D
)
(
7
)
REMOTE
/
TALLY
TERMINAL
This
terminal
performs
INPUT
/
COLOR
/
SCAN
/
SYNC
,
switch
changeover
and
controlling
turning
ON
/
OFF
of
TALLY
lamp
from
the
outside
.
d
)
AC
POWER
SOURCE
INLET
(
9
)
FOCUS
VR
(
0
)
SCREEN
VR
(
Q
)
ACC
SWITCH
ON
/
OFF
switch
for
ACC
circuit
.
This
switch
has
been
turned
ON
at
the
factory
(
ACC
circuit
functions
)
,
but
turn
this
switch
OFF
when
ACC
circuit
need
not
be
actuated
.
(
4
)
SET
UP
SWITCH
NORMAL
side
SET
UP
side
(
D
DECODE
/
RGB
SWITCH
DECODE
side
RGB
side
:
Normal
picture
:
A
horizontal
line
will
appear
.
:
Use
Input
A
or
B
terminals
:
Use
R
.
G
.
B
.
terminal
©
R
.
G
.
B
.
IN
/
OUT
TERMINAL
&
75
fi
SWITCH
To
INPUT
R
.
G
.
B
.
signal
,
input
sync
,
signal
into
sync
,
terminal
.
75
£
2
switch
changeover
*
75
£
2
side
:
For
inputting
only
in
INPUT
terminal
•
OPEN
side
:
For
taking
bridge
output
through
out
terminal
.
(
No
.
5741
)
7

TM
-
R
14
U
HOW
TO
REMOVE FOR
SERVICE
REAR PANEL
REMOVAL
Unscrew the sixteen
screws
@
shown
in
Fig
.
A
.
TOP
PANEL
REMOVAL
Unscrew
the
seven
screws
®
shown
in
Fig
.
B
after
re
-
moving
the
four
screws
at
the
top
of
the
rear
panel
.
FRONT
PANEL
REMOVAL
Unscrew the
seven
screws
(
§
)
shown
in
Fig
.
B
.
FRONT CONTROL
P .
C
.
BOARD
REMOVAL
After
removing
the
front
panel
and
wire
clamp
.
Front control
P
.
C
.
Board
can
be
drawn
forward
.
MAIN
CHASSIS
REMOVAL
1
.
Unscrew
the
two
screws
(
A
)
shown
in
Fig
.
C
.
2
.
Then
remove
the
anode
wire and
other
wires
(
if
neces
-
sary
)
from
the
wire
clamp
.
3
.
Withdraw
the
chassis
backward
along
the
rail
.
*
When
conducting
a
check
with
power
supplied
,
be
sure
to
confirm
that the
CRT
earth wire is connected
to
the
CRT
socket
board
and chassis
.
Fig
.
A
WIRE
CLAMPING
AND
TYING
BAND
1
.
Be
sure
to
clamp
the
wire
.
2
.
Never
remove
the
tying
band used
for
wire
clamping
.
Should
it
be
removed
,
be
sure
to
reclamp
the
wire
in
its
original
position
.
(
Be
sure
to
use
insulating
material
.
)
Fig
.
B
Fig
.
C
8
(
No
.
5741
)

TM
-
R
14
U
SERVICE
ADJUSTMENT
PURITY
1
.
Display
a
monochrome
pattern
.
2
.
As
viewed
from
the
back
(
See
Fig
.
E
)
,
turn
the
magnet
lock
counter
-
clockwise
to
loosen
it
.
3
.
Turn
the
green
cutoff
VR
(
R
717
)
fully
clockwise
and
the
red
and
blue
cutoff
VRs
(
R
718
,
R
716
)
fully
counter
-
clockwise
.
(
Fig
.
F
)
Adjust
the
screen
VR
so
that
the
green
band
becomes
easy
to
see
.
4
.
Loosen
the
deflection
yoke
securing
screw
and
slide
the
yoke
fully
rearward
to
obtain
color
shading
in
the
green
band
.
5
.
Overlap
the
two
purity
magnet
tabs
and
set
them
to
12
o
'
clock
position
.
6
.
Open
and
close
the
two
purity
magnets
(
scissor
fashion
)
and
adjust
so
that
the
green
band
is
positioned
at
the
center
of
the
picture
.
If
green
band
is
not
obtained
,
adjust
for
uniform
overall
coloration
.
7
.
Slide
the
deflection
yoke
forward
and
adjust
its
position
so
that
the
green
color
completely
fills
the
picture
area
.
8
.
Confirm
that
uniform
overall
rasters
of
both
red
and
blue
single
color
can
also
be
obtained
in
the
same
manner
.
9
.
Secure
the
deflection
yoke
retaining
screw
moderately
so
that
the
deflection
yoke
does
not
move
back
and
forth
.
Fig
.
E
[
Rear
View
]
G
.
DRIVE
VR
l
r
in
R
.
DRIVE
VR
G
.
CUTOFF
VR
l
\
I
/
R
.
CUTOFF
VR
B
.
CUTOFF
VR
STATIC
CONVERGENCE
(
CENTER
)
1
.
Employ
a
crosshatch
pattern
and
adjust
the
brightness
so
that
the
image
is
clear
,
but
slightly
darkened
.
2
.
Turn
the
red
and
blue
cutoff
VRs
fully
clockwise
and
the
green
cutoff
VR
fully
counter
-
clockwise
(
Fig
.
F
)
.
Adjust
the
screen
VR
for
an
easily
seen
image
.
3
.
Adjust
convergence
roughly
in
the
corner
-
by
tilting
the
deflection
yoke
vertically
or
horizontally
.
4
.
Turn
the
two
4
pole
convergence
magnets
and
adjust
so
that
red
and
blue
become
overlapped
throughout
the
picture
area
to
yield
magenta
.
(
Fig
.
I
)
5
.
-
Turn
the
green
cutoff
VR
full
clockwise
and
adjust
the
two
6
pole
convergence
magnets
so
that
the
green
and
magenta
become
overlapped
throughout
the
picture
area
to
yield
white
.
(
Fig
.
H
)
6
.
Repeat
steps
4
and
5
.
CRT
SOCKET
PB
ASS
'
Y
Fig
.
F
Green
band
Center
Adjust
to
center
green
band
.
Fig
.
G
I
Green
—
l
i
Magenta
(
Fig
.
I
Fig
.
H
(
No
.
5741
)
9

TM
-
R
14
U
WHITE
BALANCE
[
FRONT
VIEW
]
1
.
Display
a
monochrome
pattern
.
2
.
Select
the
SET
UP
switch
from
normal
to
set
up
,
and
a
horizontal
line
will
appear
(
Fig
.
J
)
!
.
3
.
Turn
the
red
,
blue
and
green
cutoff
VRs
(
R
718
,
R
716
&
R
717
)
and
the
screen
VR
fully
counterclockwise
to
eliminate
luminance
.
4
.
Gradually
turn
the
screen
VR
clockwise
to
where
single
line
of
one
of
the
colors
appears
.
5
.
Turn
the
cutoff
VR
of
this
color
clockwise
about
10
degrees
.
6
.
Again
turn
the
screen
VR
so
that
this
color
appears
only
faintly
.
7
.
Adjust
the
other
cutoff
VRs
so
that
the
horizontal
line
becomes
white
.
8
.
Return
the
SET
UP
switch
from
set
up
to
normal
and
then
display
a
monochrome
pattern
.
9
.
With
a
dark
picture
,
perform
fine adjustment
to
obtain
optimum
white
balance
.
10
.
With
a
bright
picture
,
adjust
the
red
and
green
drive
VRs
for
optimum
white
balance
.
HORIZONTAL
LINE
w
/
\
-
,
VERTICAL
CENTER
(
identified
with
a
white
notch
)
Bring
the
horizontal
line
nearest
to
the
white
notches
shown
in
the
dotted
circles
.
Fig
.
J
HORIZONTAL
LINE
Set
the
rear
SET
UP
switch
from
NORMAL
side
to
SET
UP
side
.
B
1
VOLTAGE
Cut
off
the
picture
by
the
bright
control
and
sub
-
bright
VR
.
Measure
the
voltage
between
TP
-
91
of
the
main
P
.
C
.
Board
ass
'
y
and
TP
-
E
(
yfrr
)
.
Adjust
Bx
adjustment
VR
to
obtain
110
V
.
V
.
HEIGHT
&
V
.
CENTER
*
Inputting
cross
-
hatch
pattern
.
1
.
Set
the
SCAN
switch
to
WIDE
and
adjust
V
.
HEIGHT
VR
so
that
raster
becomes
95
%
of
viewable
picture
size
.
2
.
Adjust
V
.
LIN
.
VR
so
that
the
top
and
bottom
of
screen
become
symmetrical
.
3
.
Next
,
set
SCAN
switch
to
NARR
and
adjust
NARR
V
.
HEIGHT
VR
so
that
raster
is
on
the
inside
(
about
9
mm
from
top
and
bottom
respectively
)
of
the
end
of
view
-
able
picture
size
.
(
Fig
.
K
)
4
.
When
raster
position
is
not
located
correctly
,
adjust
V
.
CENTER
VR
to
the
optimum
vertical
picture
position
.
5
.
Repeat
items
1
~
3
.
•
The
tester
used
should
be
periodically
calibrated
at
20
kl
2
/
V
.
R
.
G
.
B
.
BRIGHT
&
R
.
G
.
B
.
CONTRAST
1
.
Display
a
R
.
G
.
B
.
signal
.
2
.
Set
the
contrast
control
and
bright
control
to
the
center
position
.
3
.
Adjust
the
sub
-
contrast
VR
&
sub
-
bright
VR
for
opti
-
mum
display
.
R
.
G
.
B
.
GAIN
1
.
Input
video
signals
(
rectangular
waves
or
sinusoidal
waves
)
of
1
Vp
-
p
(
set
75
£
2
switch
to
the
7512
side
)
into
the
R
(
red
)
terminal
among
the
R
.
G
.
B
.
INPUT
terminals
.
2
.
Connect
an
oscilloscope
to
the
TP
-
R
,
and
adjust
the
R
,
GAIN
VR
so
that
its
output
becomes
0.7
Vp
-
p
.
3
.
Similarly
adjust
the
G
(
green
)
and
B
(
blue
)
GAIN
VR
'
s
.
H
.
WIDTH
COIL
&
H
.
CENTER
1
.
Set
the
SCAN
switch
to
WIDE
and
adjust
WIDTH
coil
(
L
503
)
so
that
raster
become
95
%
of
viewable
picture
size
.
(
Fig
.
L
)
SUB
-
APERTURE
1
.
Set
the
aperture
control
to
the
center
position
.
2
.
Adjust
the
sub
-
aperture
VR
for
optimum
display
.
3
.
By
turning
the
APERTURE
KNOB
,
confirm
that
changes
occur
from
a
soft
screen
to
a
clear
screen
.
10
(
No
.
5741
)