Sony TRINITRON PVM-9221ME User manual

SERVICE MANUAL
LULU
FITNESS
SUMIIN
CISTEL ELENA
LEELA
LU
TEITONTTTT
LEELA
EEL
TTS
September, 1985
AEP Model
Chassis No. SCC-696A-A
SPECIFICATIONS
Color system PAL and SECAM systems, switched
automatically
Picture tube Super Fine Pitch Trinitron tube
Approx. 195 mm (9 inches)
(Approx. 221 mm picture measured di-
agonally)
70-degree deflection
Resolution 400TV lines (B/W)
Color temperature
6500°K
Frequency response
5.5MHz (—3dB)
Horizontal linearity
+8%
Vertical linearity
+8%
Line pull range Horizontal +500 Hz
Overscan of the picture
6%
Underscan of the picture
5%
H/V delay Horizontal: Approx. 1/4 line
Vertical: Approx. 1/2 field
Return loss 5 MHz, -30 dB (VIDEO A IN, VIDEO B
IN)
Zooming Within 3%
Convergence Central area 0.6mm
Periphery 0.7mm
Brightness More than 30 foot-lamberts
MICROFILM
Inputs VIDEO IN (VIDEO A, VIDEO B):
BNC connector
Composite 1 V p-p +6 dB,
75 ohms, unbalanced, sync
negative
Non-composite 0.7 V p-p
EXT SYNC IN: BNC connector
Composite sync 4V p-p +6 dB,
sync negative, 75 ohms and high
impedance switchable
Loop-through outputs
VIDEO OUT (VIDEO A, VIDEO B):
BNC connector
Composite 1 V p-p +6 dB,
75 ohms, unbalanced, sync
negative
Non-composite 0.7 V p-p
EXT SYNC OUT: BNC connector
Composite sync 4V p-p +6 dB,
sync negative, 75 ohms and high
impedance switchable
TALLY connector
4-pin DIN connector
Power requirements
220/240 V ac, 50/60 Hz
Power consumption
35 W ac, max.
—
Continued
on
next
page
—
TRINITRON «
COLOR VIDEO MONITOR
SONY.

PVM-9221ME |
Color system PAL and SECAM systems, switched
automatically
Picture tube Super Fine Pitch Trinitron tube
Approx. 195 mm (9 inches)
(Approx. 221 mm picture measured di-
agonaily)
70-degree deflection
Resolution 400TV lines (B/W)
Color temperature
6500°K
Frequency response
5.5MHz (—3dB)
Horizontal linearity
+8%
Vertical linearity
+8%
Line pull range Horizontal +500 Hz
Overscan of the picture
6%
Underscan of the picture
5%
Horizontal: Approx. 1/4 line
Vertical: Approx. 1/2 field
Return loss 5 MHz, —30 dB (VIDEO A IN, VIDEO B
IN)
Zooming Within 3%
Convergence Central area 0.5mm
Periphery 0.7 mm
Brightness More than 30 foot-lamberts
Inputs VIDEO IN (VIDEO A, VIDEO B):
BNC connector
Composite 1 V p-p +6 dB,
75 ohms, unbalanced, sync
negative
Non-composite 0.7 V p-p
EXT SYNC IN: BNC connector
Composite sync 4 V p-p +6 dB,
sync negative, 75 ohms and high
impedance switchable
H/V delay
Loop-through outputs
VIDEO OUT (VIDEO A, VIDEO B):
BNC connector
Composite 1V p-p +6 dB,
75 ohms, unbalanced, sync
negative
Non-composite 0.7 V p-p
EXT SYNC OUT: BNC connector
Composite sync 4V p-p +6 dB,
sync negative, 75 ohms and high
impedance switchable
TALLY connector
4-pin DIN connector
Power requirements
220/240 V ac, 50/60 Hz
Power consumption
35 W ac, max.
Dimensions Approx. 216 x 219 x 319 mm (wi/h/d)
(85/e x 85/8 x 1253/8 inches)
incl. projecting parts and controls
Weight Approx. 7.5 kg (16 Ib 9 02)
not incl. accessories
Accessories supplied
AC power cord (1)
Tally connector (4-pin DIN) (1)
Number plate (1 set)
Optional accessory
Mounting bracket MB-504
While the information given is true at the time of print-
ing, small production changes in the course of our
company's policy of improvement through reseach and
design might not necessarily be indicated in the specifi-
cations. We would ask you to check with your appointed
Sony dealer if clarification on any point is required.
Your dealer may not handle the above optional accesso-
ry. Please ask the dealer for detailed information about
the optional accessories available in your country.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY SHADING AND MARK
ON THE SCHEMATIC DIAGRAMS, EXPLODED
VIEWS AND IN THE PARTS LIST ARE CRITICAL TO
SAFE OPERATION. REPLACE THESE COMPONENTS
WITH SONY PARTS WHOSE PART NUMBERS APPEAR
AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS
THAT ARE CRITICAL TO SAFE OPERATION ARE
IDENTIFIED IN THIS MANUAL. FOLLOW THESE PRO-
CEDURES WHENEVER CRITICAL COMPONENTS ARE
REPLACED OR IMPROPER OPERATION iS SUSPECTED.

PVM-9221ME
TABLE OF CONTENTS
Section
Title
Page
Section
Title
Page
1.
GENERAL
5. DIAGRAMS
Ish.
> (Redtures
c.nccenist
cio San
ete meters
4 5-1,
Circuit
Boards
Location
..................
25
1-2...
Precautions
...........
cc
cece
cence
eens
4
5-2.
Block
Diagram.............
0...
c
cece
eee
25
1-3.
Location
and
Function
of
Controls
........
5
5-3.
Schematic
Diagrams
.....................
29
1-4.
System
Connections
.................0.005
7
5-4.)
Waveforms’
ic
cca gedcs
it
aauies
Aga
Paras
37
2. DISASSEMBLY
5-5.
Printed
Wiring Boards....................
39
2-1. Cabinet
Removal....................0000.
9
BA Board
«1.0.0...
ieee
eee eee ees
39
2-2.
Bezel
Removal
.................00000e
eee
9
C
Board
iiin2.4
seis al
cco
ted
ae
beta
caw saeaes
40
2-3.
Cabinet
Bottom
Removal
.................
10
FBP Bo
ar
io.
penis
aed
Sacre havin
tel
ate
0 40
2-4.
DA
Board
Removal
..............0...005.
11
DA
BOaTG)
ies
ee cae
ios eh
een
neds
ens
41
2-5.
BA.
BB
Board
Removal...................
11
DD
Board
ic
ide.
gis
Pe
aah
as na
Ge
wets
42
2-6.
Picture
Tube
Removal
....................
12
FB
Board)y..
8.
52a
he
gssede
dey
os
odes
tas
43
2-7.
Replacing
FBT
...............
00.00.0000
12
PA
Board
5.0
feces
eh
dite peamaaybedegs
ied: 44
3.
SET-UP
ADJUSTMENTS
XBoard “ts
ccs
yd
baw
cwer
nin
oa
noes
44
3-1.
Beam
Landing
..........0.......0....005.
13
BB
Board
itv
catives
peciae
sinadeia
cides
45
3-2.
Focus
Adjustment
..............0....0000.
13
QVBoa
rd rs.
ates
nei nists
delete
Bea
dei
Sas
45
3-3.
Convergence
........
00.
eee
ee
eens
14
DB Board)
«2. eens
is awaiiede
ween
es
46
3-4.
White Balance ..............
0.0...
e cece
15
HA
Board
sigs
sasileseaniat
Tabs
aw
aeece 46
4, CIRCUIT
ADJUSTMENTS
5-6.
Semiconductors
................0.0000
000s
47
4-1.
BB
Board
Adjustments
.....-...-....-...-
16
6.
EXPLODED
VIEWS
4-2.
HA
Board
Adjustments
..................
18
6-1.
Bezel,
Cabinet..........0000....0..0..00..
48
4-3.
BA
Board Adjustments................065
19
6-2.
Bottom Cabinet ..............
0.0.00 ceca 49
4-4.
DAand
FB Boards
Adjustments
.........
22
O-3..
<
Chassis!
viscid
whee
tide
eedeueia
tangs es .
50
7.
ELECTRICAL
PARTS
LIST
......0.0....00..00.,
51

2VM-9221ME
SECTION 1
GENERAL
1-1. FEATURES
Super Fine Pitch Trinitron® picture tube
The Super Fine Pitch Trinitron picture tube gives a
high resolution, high contrast picture.
PAL/SECAM broadcasting standard receivable
The monitor can receive PAL and SECAM signals. The
appropriate broadcasting standard is selected automat-
ically.
Push-to-lock controls
In the locked position, the controls are protected from
damage during carriage of the unit. The protruding posi-
tion allows easier operation.
Monitor of sync signals
The H/V-DELAY switch allows horizontal and vertical
sync signals to be displayed on the screen.
Blue only picture
By using the B-ONLY switch, the picture can be dis-
played in blue and black only, facilitating observation of
VTR noise.
Underscan mode
The signal normally scanned outside of the screen can
be monitored in the underscan mode, providing check
facility of video signals.
External sync connection
The unit can operate on an external sync signal in syn-
chronization with other VTR equipment.
Two video inputs
Two video sources can be connected to the unit. Either
input can easily be switched by pressing the INPUT se-
lect switch.
A
By using an optional MB-504 mounting bracket, this unit
can be mounted in an EIA standard 19-inch rack.
For mounting details, refer to the instruction manual of
the MB-504.
1-2. PRECAUTIONS
On safety
@ Operate the unit only on 220/240 V ac.
Use
only
the
supplied
ac
power
cord.
Do
not
use
any
other type.
e@Should
any
liquid
or
solid
object
fall
into
the
cabinet,
unplug
the
unit
and
have
it
checked
by
qualified
per-
sonnel
before
operating
it
any
further.
@Unpiug
the
unit
from
the
wall
outlet
if
it
is
not
to
be
used
for
serverat
days.
eto
disconnect
the
ac
power
cord,
pull
it
out
by
the
plug.
Never
pull
the
cord
itself.
On installation
@
Allow
adequate
air
circulation
to
prevent
internal
heat
build-up.
Do
not
place
the
unit
on
surfaces
(rugs,
blankets,
etc.)
or
near
materials
(curtains,
draperies)
that
may
block
the
ventilation
holes.
e@
Do
not
install
the
unit
in
a
location
near
heat
sources
such
as
radiators
or
air
ducts,
or
in
a
place
subject
to
direct
sunlight,
excessive
dust,
mechanical
vibration
or
shock.
e
Keep
the
unit
away
from
strong
magnets
or
magnetic
fields
such
as
a
loudspeaker
or
motor,
as
the
picture
may
be
affected.
On cleaning
To
keep
the
unit
looking
brand-new,
periodically
clean
it
with
a
soft
cloth.
Stubborn
stains
may
be
removed
with
a
cloth
lightly
dampened
with
a
mild
detergent
solution.
Never
use
strong
solvents
such
as
thinner
or
benzine,
or
abrasive
cleansers
since
these
will
damage
the
cabinet.
As
a
safety
precaution,
unplug
the
unit
before
cleaning
it.
On repacking
Do
not
throw
away
the
carton
and
packing
materials.
They
make
an
ideal
container
in
which
to
transport
the
unit.
When
shipping
the
unit
to
another
location,
repack
it
as
illustrated
on
the
carton.
If
you
have
any
questions
about
this
unit,
contact
your
authorized
Sony
dealer.

| PVM-9221Ml
1-3. LOCATION AND FUNCTION OF CONTROLS
Front panel
_aiurisamemaeneeeeneneraecepeneerecte erect pete meena,
+ $i
& g
{
i
d
3
i
Rear panel
i
Me

°2VM-9221ME
FRONT PANEL
@ Tally lamp
This lamp is turned on and off according to the signal
supplied to the TALLY connector at the rear from a
control console or special-effects generator. To
identify the monitor, insert the supplied number
plate.
@ INPUT select switch
Keep this switch released (c A) to monitor the signal
from the VIDEO A IN connector.
Depress the switch (= B) to monitor the signal from
the VIDEO B IN connector.
© SCAN mode select switch
Keep this switch released (2 NORM) for normal scan-
ning.
Depress the switch (s UNDER) to reduce the display
size by about 5% (underscanning mode) and to view a
picture which does not appear in normal scanning.
@ B-ONLY (blue only) switch
Normally keep this switch released (a NORM).
Depress the switch (as BLUE) to turn off the red and
green beams. The picture will be displayed in blue
and black only. This facilitates observation of VTR
noise.
@ H/V-DELAY switch
Normally keep this switch released.
To monitor the sync signals, depress the switch. The
picture is shifted horizontally and vertically. The hori-
zontal sync is displayed in left approximately one
quarter of the screen and the vertical sync is dis-
played near the center of the screen.
@ SECAM switch
Depress this switch when a picture from SECAM
color sources is distorted. The picture will become
clear.
@ SYNC switch
Normally keep this switch released (2 INT). The mon-
itor is driven with the internal sync signal.
To drive the monitor with an external sync signal con-
nected tothe SYNC IN connector at the rear, depress
the switch (= EXT).
© Color system indicators
indicate the color system of the input video sig-
nal: PAL or SECAM.
© V HOLD (vertical hold) control
If the picture rolis vertically, correct it with this con-
trol.
@ SHARP (sharpness) control
Adjusts the sharpness of the picture. Clockwise rota-
tion makes the picture sharper; counterclockwise ro-
tation makes it softer.
@ COLOR control
Adjusts the color intensity of the picture. Clockwise
rotation makes the picture more vivid; counter-
clockwise rotation makes it paler.
® BRIGHT (brightness) control
Adjusts the brightness. Normally set this control at
the center detent position. Clockwise rotation makes
the picture brighter; counterclockwise rotation
makes it darker.
® PICTURE control
Adjusts the contrast, intensity and brightness simul-
taneously in the proper ratio.
Before turning one of the controls @ to ®, for easier
operation press on it to release the control to a
protruding position.
@® POWER switch and indicator
To turn the monitor on, depress the POWER switch
(ma ON). The POWER indicator lights. To turn it off, .
press the switch again (co OFF).
REAR PANEL
® VIDEO A, © VIDEO B
Two video input connectors (VIDEO A and VIDEO B)
for the composite video signals and their
loop-through output connectors.
To monitor the input signals connected to the VIDEO
A IN connector, keep the INPUT select switch
released (a A).
To monitor the input signals to the VIDEO B IN
connector, depress the INPUT select switch (. B).
IN connector (BNC type)
Connect to the video output of video equipment, such
as a VTR or a color video camera.
OUT connector (BNC type)
Loop-through output of the IN connector. Connect to
the video input of a VTR or another monitor.
75 Q termination switch
When only the IN connector is used (the OUT
connector is not used), set this switch to ON. When
both the IN and OUT connectors are used together for
a loop-through connection, set the switch to OFF.

@ EXT SYNC (external sync)
IN connector (BNC type)
When this monitor operates on an external sync sig-
nal, connect the reference sync signal to this connec-
tor.
OUT connector (BNC type)
Loop-through output of the EXT SYNC IN connector.
Connect to the external sync input of video equip-
ment to be synchronized with this monitor.
75 Q termination switch
When only the EXT SYNC IN connector is used (the
EXT SYNC OUT connector is not used), set this
switch to ON. When both the EXT SYNC IN and OUT
connectors are used together for a loop-through con-
nection, set the switch to OFF.
@ R/G/B BKG (background) controls
Used for adjusting the white balance of the back-
ground.
@® R/G/B DRIVE controls
Used for adjusting the white balance at the white
peak.
@ TALLY connector (4-pin DIN)
Connect to the tally output of a control console, spe-
cial-effects generator, etc. The tally lamp on the front
panel will be turned on or off by the connected con-
sole or special-effects generator.
@ AC IN socket
Connect the supplied ac power cord to this socket
and to a wall outlet.
| PVM-9221M
1-4. SYSTEM CONNECTIONS
CONNECTING A VTR OR CAMERA
Video Video
VTR
4
camera
1
VTR2
camera
2
or
VIDEO VIDEO
OUT OUT
VIDEO B
iim aa Na I A Tae a SN Bn

*'VM-9221ME
CONNECTING SEVERAL MONITORS
A loop-through connection is convenient for monitoring
the same signal on several monitors. The VIDEO A OUT
connector is for the signal connected to the VIDEO A IN
connector, and VIDEO B OUT, for the signal connected
to VIDEO B IN. Up to 10 monitors can be connected for
each group. Set the 75Q termination switch of the last
monitor to ON and those of the other monitors to OFF.
Vid@O®. (422 Sees te tts Se
VTR
camera
When
an
external
sync
»
or
—"
generator
is
connected
,
:
wee eee ee Z y
jor video
tcamera
|
{
: t
First I
monitor
VIDEO A)
Second [ ¥
monitor, §
Last if ar ii =
monitor a o=06
Recess SS eee
When an external sync generator is connected, depress
the SYNC switch ( EXT) on each monitor.
TALLY CONNECTION
To utilize the tally-lamp feature of this monitor, connect
the TALLY connector at the rear of the monitor to a con-
trol console, special-effects generator, etc. using the
supplied tally connector. The No.1 (ground) and No.2
(tally) pins should be connected to the corresponding
pins of the tally out connector.
The tally lamp on the front panel will be turned on or off
by operating the console or special-effects generator.
Supplied tally
connector
Console or
special-effects
generator
How to use the supplied number plate
To identify the monitor in your system, insert the sup-
plied number plate under the tally lamp cover. When the
tally lamp lights, the number will be illuminated.

| PVM-9221M
SECTION 2
DISASSEMBLY
2-1. CABINET REMOVAL
@) CABINET
Ss a two screws
see (BVTP3x8
@) screw (BVTP3x8)
@)HB board
a
@) two screws (BVTP3x8)
©) two screws
(BVTP3x12)
@) HA board
pel o) two screws
H (BVTP3x8)
X board

2VM-9221ME |
2-3. CABINET BOTTOM REMOVAL
two screws
(BVTP3x8)
@) two screws
(BVTP3x8)
wore 4
© eh 7 (2) P
©) 0B BOARD
(FB block)
(2) FB BOARD
@) two screws
(BVTP3x8)
(2) CABINET (LOWER)
FA BOARD
B) two screws
(BVTP3x8)
@) two screws
{BVTP3x12)

| PVM-9221ME
2-4. DA BOARD REMOVAL

PVM-9221ME |
2-6. PICTURE TUBE REMOVAL
@ deflection yoke
@) screw (BVTP3x8)
@) anode cap
6)
two
flange
Se
g)
.
ae
@) two flange nuts
2-7. REPLACING FBT
When FBT is replaced, wind copper foil
to the FBT and solder.
Part No. )
4-374-856-01
copper foil
coe

SECTION 3
| PVM-9221ME PVM-9221ME |
SET-UP ADJUSTMENTS
The following adjustments should be made when
a complete realignment is required or a new
picture tube is installed.
Controls and switch should be set as follows unless
otherwise noted:
BRT. CONTR controls...... fully clockwise
Make the following adjustments in the order as follows
given:
3-1.
3-2.
3-3.
3-4,
Beam Landing
Focus Adjustment
Convergence
White Balance
Note: Test Equipment Required
1. Color-bar/pattern generator
2. Degausser
—_—
oO
eer
—
ee
ee
eee
ee
ee
3-1. BEAM LANDING
Preparation:
e Before starting, degauss the entire screen.
1. Loosen deflection yoke screw.
2. Remove deflection yoke spacers.
3. Adjust purity control to center the slide between
10.
11.
12.
two projections as shown in Fig. 1-1.
Slide deflection yoke as far forward as it will go.
Turn RED CUT OFF VR (RV259) MAX and
GREEN (RV261) and BLUE CUT OFF RV
(RV263) MIN.
Turn purity control to center vertical red band as
shown in Fig, 1-2.
Slide deflection yoke back for a uniform red screen.
Check green and blue rasters for uniformity.
Repeat the steps 6, 7 and 8. --
Turn all CUT OFF VR (RV259, 261, 263) for
mechanical CENTER.
Install the deflection yoke spacers.
Tighten the deflection yoke screw.
Check if mislanding appears at corners a-d as-
shown in Fig, 1-3. If mislanding is observed,
correct it as shown in Fig. 1-4.
3-2. FOCUS ADJUSTMENT
(1)
(2)
Input monoscope signal.
PICTURE control..... 80%
BRICHT control..... 50%
Adjust FOCUS control for a best picture at the
center and both sides of the screen.
FOCUS
iS
P ts
t
urity control correc
‘his area.
S|
Disk magnet corrects
these arreas.
Nx
3-3. CONVERGENCE
Preparation: re
Before starting, make FOCUS, H.SIZE. V.SIZE
and V.LIN adjustments.
e@ Turn BRT control fully counterclockwise.
e@ Feed in the dot pattern.
(1) Horizontal Static Convergence and Vertical Static
Convergence
If blue dot does not coincide with red and green
dots.
Move BMC magnet to correct insufficient H.Static
convergence.
Rotate
BMC
magnet
to
correct
insufficient
V.static
convergence.
(2)
In either case. repeat Beam Landing Adjustment,
(A)
(B)
Beam Alignment Magnet
Dynamic Convergence Adjustment
Preparation:
Before
starting.
perform
Horizontal
and
Vertical
Static
Convergence
Adjustment.
Loosen deflection yoke screw.
Remove deflection yoke spacers.
Move
the
deflection
yoke
for
best
convergence
as
shown
below.
' Tighten the deflection yoke screw.
Install the deflection yoke spacers.
© HMC © VMC A
R GB a
ab G a*b
iaieoe “as
B
ab
Adjust HMC
as I
Sem
)
a
yon
BLUE
Adjust VMC .
pat sah
RGB BG
En)
(2)
iva)
- AN TNO
ae’

V-9221ME PVM-9221ME |
ows
acts
-
3.
Move
the
deflection
yoke
for
best
convergence
as
3-3. CONVERGENCE
Preparation: -
@ Before starting. make FOCUS, H.SIZE. V.SIZE
and V.LIN adjustments.
e@ Turn BRT control fully counterclockwise.
@ Feed in the dot pattern.
(1) Horizontal Static Convergence and Vertical Static
Convergence
If blue dot does not coincide with red and green
dots,
Move BMC magnet to correct insufficient H.Static
convergence,
Rotate BMC magnet to correct insufficient V.static
convergence.
In either case. repeat Beam Landing Adjustment.
(A) (B)
Beam Alignment Magnet
H. STAT
C board
(2) Dynamic Convergence Adjustment
Preparation:
e@
Before
starting.
perform
Horizontal
and
Vertical
Static
Convergence
Adjustment.
1. Loosen deflection yoke screw.
2. Remove deflection yoke spacers.
shown below.
4." Tighten the deflection yoke screw.
5. Install the deflection yoke spacers.
© HMC © VMC
R G B a
ab G Bb
b
B
a b
Adjust HMC
Seam ) Mm
ADJ)
BLUE => Bae
Adjust VMC
fi
i
3-4. WHITE BALANCE
(1)
1.
2:
(2)
SCREEN (G2)
In put a dots pattern.
Set the PICTURE control at minimum and turn
the BRIGHT control fully counterclock wise.
Confirm that BKG voltage is less than 105V dc
when turning RV259 (R.BKG). RV261 (G.BKG)
and RV263 (B.BKG).
Note the color which becomes visible first when
turning SCREEN VR.
WHITE BALANCE
Input a cross-hatch pattern.
Set the PICTURE control to minimum and turn
the BRIGHT control click position.
Turn RV262 (B.DRIVE), RV260 (G.DRIVE) and
RV258 (R.DRIVE) fully clockwise.
Set RV259 (R.BKG). RV261 (G.BKG) and RV263
(B.BKG) to minimum.
Turn RV518 (SUB BRT) slowly to obtain a
faintly visible cross-hatch. Note the color that
first becomes visible by turning. Do not turn a
BKG control for this color.
Adjust the other two BKG controls for best white
balance (neutral gray) of the faint cross-hatch.
Set the PICTURE control to maximum and turn
the BRIGHT control fully clockwise. Observe the
screen and adjust the DRIVE controls for best
white balance.
Repeat steps |. through 6. several times.
PVM-9221ME
MAX MIN
80%
50%
(Adjusting VR position)
SCREEN
RV259 = R. BKG
RV261 G. BKG
RV263 8B. BKG
RV258 R. DRIVE
RV260 G. DRIVE
RV262 B. DRIVE
BA Board

PVM-9221ME
SECTION 4
CIRCUIT ADJUSTMENTS
Note:
(1)
TEST
EQUIPMENT
REQUIRED
1. Oscilloscope
2. Digital multimeter
3. Color-bar/pattern generator
(2) INPUT SIGNAL
When
making
these
adjustments,
supply
a
color-
bar or an off-air signal.
(3)
These
adjustment
should
be
performed
with
the
rated
power
supply
voltage
unless
otherwise
noted.
CIRCUIT ADJUSTMENTS
Circuit
Page
pas aigh ay Board
1H DELAY
V. DELAY
LINE PULSE DELAY
SUB CONTRAST
SECAM COLOR LEVEL
ANT PAL
SUB COLOR
APC
KILLER POINT BA 19-21
CHROMA TRAP
SECAM (ID)
SECAM (B-Y)
BAT
ACC
POWER SUPPLY OPERATION| FB | 22 |
BLANKING OPERATION
22-24
CHECK
H BLANKING
H FREQ
V LINE
UNDER SCAN, V SIZE
V SIZE
V CENT
4-1. BB BOARD ADJUSTMENTS
H DELAY ADJUSTMENT
1. ‘Input @PAL color bar signal.
PICTURE . .80% :
LINE PULSE DELAY ADJUSTMENT
1. Input an color bar signal.
2. Set the DELAY mode.
2. Observe the connector BB-2 pin @ waveform on pin @ort BA-1.
the oscilloscope, and adjust RV265 for 40 + tusec. | 4. Adjust RV257 for the waveform to becomes as
Fig. 7.
oscilloscope
Fig. 1
oscilloscope.
V. DELAY ADJUSTMENT
1. Input a PAL color bar signal.
PICTURE 80%
BRT 50%
2.
Observe
the
connector
BB-2
pin
waveform
on
arene
the oscilloscope, and adjust RV266 for 10 + 1Imsec. 10 + ims
3. Connect dual oscilloscope at pin @) of BB-3 and.
a
|
i
|
|
waveform
of
connector
BB-3
pin
@
se
.
a)
pm)
waveform ef connector BA-1 pin @
PVM-9221ME PVM-922
oscilloscope

PVM-9221ME PVM-9221ME
4-2. HA BOARD ADJUSTMENTS
JSTMENTS
MENT
LINE
PULSE
DELAY
ADJUSTMENT
SUB
CONTRAST
ADJUSTMENT
wr signal. 1. Input an color bar signal. 1, Input a monoscope pattern signal.
PICTURE 100%
2. Set the DELAY moae.
3. Connect dual oscilloscope at pin @ of BB-3 and
BRT 50%
2. Observe connector BA-6 pin @on the oscilloscope
|
tor
BB-2
pin
@
waveform
on
pin
@)of
BA-1.
:
f
adjust
RV265
for
40
+
Tusec.
4.
Adjust
RV257
for
the
waveform
to
becomes
as
and
adjust
RV508
so
that
the
signal
component
is
|
Fig.
1.
1.4Vp-p.
oscilloscope
waveform of connector BB-3 pin @
UAL
waveform
af
connector
BA-1
pin
@
oscilloscope
SECAM COLOR LEVEL ADJUSTMENT
1, Input a SECAM color bar.
2., Connect oscilloscope at pin @ of BA-6 connector.
3. Set the PICTURE contro} at max and COLOR
contro/ at canter.
Adjust RV519 (HA board) for thé waveform at
connector BA-6 pin @) to become as Fig. 1.
same level
—— a,
' oscilloscope
MENT |
dar signal.
stor BB-2 pin @ waveform on
d
adjust
RV266
for
10
+
Imsec.
10
+
Ims

| PVM-9221ME PVM-9221ME |
4-3. BA BOARD ADJUSTMENTS
RV252 RV251
ANT PAL ADJUSTMENT
.
Input
a
PAL
special
color
bar.
=
.
Connect
an
oscilloscope
to
pin
@
of
BA-6
con-
nector.
i
3.
Set
the
COLOR
control
at
center.
7
:
4,
Adjust
RV251
and
RV252
for
the
waveform
at
Fig.
1
connector
BA-6
pin-
@
to
become
as
Fig.
.1x
».
—_
Adjust
a
—
—-—
for
even
1."
Input
a
PAL
color
bar
signal.
;
height
PICTURE
100%
--
.COLOR
50%.
.
:
:
2.
Adjust_
RV264
for
the
waveform
at
connector
BA-6
@
to
become
as
Fig.
2.
Fig. 2
APC ADJUSTMENT
1. Inputa PAL color bar signal.
PICTURE 80%
BRIGHT 50%
COLOR 50%
2. Connect a 100k2. resistor between 1C253 pin @
"and ground (Killor circuit goes off). nen
Connect a 10uF/25V chemical.capacitor between
1€253 pin © and ground. ae
Adjust RV256 to obtain the stable color picture.
Disconnect the 100kQ resistor and chemican
capacitor. “ee
w
As
digital multi-meter
KILLER POINT ADJUSTMENT
1. Tune in an off-air signal.
2. Connect digital multimeter between R255 and
R378. ;
3. Adjust R255 so that the voltage is 8:3V de.’
CHROMA TRAP ADJUSTMENT
1. Input a SECAM calor bar signal.
PICTURE 80%
“BRIGHT 50% a tetas | hae
2. Observe connector BA-6 pin (1) waveform on the” nA
oscilloscope and adjust 1.253 for minimum chroma” ~
component. :
3. Input aPAL color bar signal.
4. Observe connector BA-6 pin @ waveform on the
oscilloscope and adjust L252 for minimum chroma Fig. 3
component.
chroma oscilloscope
component
—19— Pee oe Ge Sos - . 0

21ME
PVM-9221ME
.
PVM-9221ME
Jt VRBEagaes
SECAM ADJUSTMENT (1D)
1. Input the SECAM color bar.
2. Connect an digital multimeter to pin @5) of 1C252.
3. Adjust T254 so that the digital multimeter reading
is maximum.
SECAM ADJUSTMENT (B-Y)
1. .Input the SECAM color bar.
2. Connect an oscilloscope to pin @) of 10252.
3. Adjust T253 for the waveform at pin @5) of 1C252
to becomes as Fig. 5.
Can rm 7 mr
rae Np. N Vr WC
Fig. 5
4. Connect an oscilloscope to pin ® of BA-6 con-
nector.
5. Adjust T7255 for the waveform at connector BA-6
pin @to become as Fig. 6.
os. oN, fee: eS
r s
[PU pu [PUupuT
S |
Fig. 6
BAT ADJUSTMENT
1. Input a PAL color bar signal.
PICTURE 80%
BRIGHT 50%
COLOR 50%
2. Observe Q272 © waveform on the oscilloscope
and adjust T257 for minimum chroma component.
ig t
a -_— minimum
ACC ADJUSTMENT!
1. Inputa PAL color bar signal.
PICTURE 80%
BRIGHT 50%
COLOR 50%
2. Observe Q272 © waveform on the oscilloscope
and adjust RV253 so that the signal component is
1.2 £0.1Vp-p.
oscilloscope
-——71.2t0.1Vp-p

PVM-9221ME
|
|
PVM-9221ME
PVM-922°
4-4. DA AND FB BOARDS ADJUSTMENTS
BLANKING
OPERATION
CHECK
;
digital
multi-meter
. Input the monoscope signal.
. Connect an digital multimeter to TP61.
. Confirm that the BLANKING circuit. operate
VDC
(the raster disappears) by adding 24.0
to TP61,
—0.1
POWER SUPPLY OPERATION CHECK
1, Input a monoscope signal.
2. Connect a digital voltmeter to connector DA-2
pind).
3. Adjust RV610 for 29.0 + 0.2V DC.
digital multi-meter
|H BLANKING ADJUSTMENT
1. Input a PAL monoscope signal.
PICTURE 80%
BRIGHT 50%
SCAN UNDER
. Adjust VIDEO PHASE (RV801) and H. BLK
WIDTH (RV806) to be A=B, as shown in the
figure.
—22— —23— monoscope pattern

| PVM-9221ME PVM-9221ME
V. CENT ADJUSTMENT
1. Input a PAL monoscope signal.
PICTURE 80%
BRIGHT 50%
2 Adjust with V. CENT (RV804) so that picture is
centered,
V. SIZE ADJUSTMENT
1. Input a PAL monoscope signal.
PICTURE 80%
BRIGHT 50%
2. Set the V. SIZE (RV803) to obtain a suitable
picture.
UNDER-SCAN V. SIZE ADJUSTMENT
1. Input a PAL monoscope signal.
PICTURE . .80%
}: BRIGHT. . .50%
nN SCAN. ....UNDER
itz 2. Adjust UN V. SIZE (RV802) so that the mono-
scope pattern of H. SIZE and V. SIZE is 4:3.
Soe TY
V. LINE ADJUSTMENT
1. Input a PAL monoscope signal.
PICTURE 80%
BRIGHT 50%
2. Adjust V. LINE (RV808} so that the monoscope
pattern of A and B is same scale.
monoscope pattern
H. FREQ ADJUSTMENT
1. Input a PAL monoscope signal.
PICTURE 80%
BRIGHT 50%
2. Connect a jumper between C800 minus side and
ground.
3. Adjust with H. FREQ (RV800) as shown in figure.
ZZ, ~ |__| - NV
fo law fo correct fo high
f
A B
H BLANKING ADJUSTMENT | |
1. Input a PAL monoscope signal.
PICTURE 80%
BRIGHT 50%
SCAN UNDER
2. Adjust VIDEO PHASE (RV801) and H. BLK
WIDTH (RV806) to be A=B8, as shown in the..-
figure.
AS
—23— monoscope pattern