JVC TM-41 EG User manual

JVG
Service
Manual
COLOUR VIDEO MONITOR
more.
TM-41
EG/EK
VICTOR
COMPANY
OF
JAPAN,
LIMITED.

JVC Service Manual
move. TM-41 EG/EK
VICTOR COMPANY OF JAPAN, LIMITED.

TABLE OF CONTENTS
1. GENERAL DESCRIPTION
1 INTRODUCTION
2 FEATURES
3. SPECIFICATIONS - i
4 PRECAUTIONS...........
.8 HANDLING
6
7
8
9
CONTROLS AND CONNECTORS ..
POWER SUPPLY .........
RECHARGING THE PBP-1 BATTERY PACK .
CONNECTIONS
2, DISASSEMBLY
.1 TOPCOVER...... wt
.2 POWER CORD ASSEMBL
3 FRONTPANEL....
CRT a sjagts stay etind hte stot
5
6
7 VIDEO/AUDIO BOARD-1.
-8 VIDEO/AUDIO BOARD-2
NRNVNANNYONNN
3. ALIGNMENT PROCEDURE
Bt VOLTAGE (10.5Vj ............0..
PAL COLOR CIRCUIT ADJUSTMENT ..
SECAM COLOR CIRCUIT ADJUSTMENT
PURITY ...... ate
CONVERGENCE ... ae
WHITE BALANCE ...............-4,
SUB-CONTRAST AND SUB-BRIGHTNESS .
SUB-COLOR
WOWKKWYAWWYW
Loamrnoarwon
4.
5. EXPLODED VIEWS AND PARTS LIST
5.1 SAFETY PRECAUTION
5,2 GENERAL RULER FOR NUMBERING METHOD OF SCREW/WASHER/E-RING . .
5.3) GENERAL: ASSEMBLY © 22:2. .0e°sfese eis 2 aoma ie nqiestin a bd: ogo abe ade a to ates ergeS gostei a
6. . DIAGRAMS-AND. CIRCUIT BOARDS
6.1 BLOCK DIAGRAM ............ Sea becers) fe eee oD ieae Wg we die S SOE a ase SMT aE 6-1

7.
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ELECTRICAL PARTS LIST
MAIN P.W.B. ASSEMBLY
PAL/SECAM PB P.W.B. ASSEMBLY
POWER P.W.B. ASSEMBLY
VIDEO/AUDIO BOARD-1 . toate
VIBDEO/AUDIO BOARD-2........
POWER SWITCH P.W.B, ASSEMBLY
VOLUME P.W.B, ASSEMBLY .....
CRT SOCKET P.W.B. ASSEMBLY ..
COLOR SYSTEM P.B.W. ASSEMBLY
10 L.E.D. P.W.B. ASSEMBLY ......,-.-0-05
.11 JACK P.W,B, ASSEMBLY ... 0.2.0... 2 eee ee
W

SECTION 1
GENERAL DESCRIPTION
1.1. INTRODUCTION
This manual provides service information for the JVC
TM-41EG/EK Color Video Monitor. The manual de-
scribes the instruction and adjustment of electrical
operation. Service procedures given herein cover only
field maintenance services.
Adjustments which require high-level instruments, jigs
and techniques are excluded, since they should be per-
formed at the factory.
Due to design modifications, the service procedures and
data given in this manual are subject to posssible change
without prior notice.
WARNING:
TO PREVENT FIRE OR SHOCK HAZARD, DO
NOT EXPOSE THIS UNIT TO RAIN OR
MOISTURE.
POWER SYSTEM
The operating voltage of this set is preset to 220 V
~(EK-version: 240 V~\} at the factory.
Before connectiong to mains, check that the vol-
tage selector on the rear panel is set to the same
voltages as your local mains supply.
Adapting to local power line
This set operates on either 110, 127, 220 or
240 Vv. The voltage selector can be reset as
follows. Turn the voltage selector using a screw-
driver until the proper voltage appears at the
cutout.
r
IMPORTANT {In the United Kingdom)
Mains Supply (AC 240 Vv, 50 Hz only)
IMPORTANT
Do not make any connection to the Larger Ter-
minal coded E or Green, The wires in the mains
lead are coloured in accordance with following
code:
[ees Blue to N {Neutral} oF Black
_ = Brown to L (Live) or Red
If these colours do not correspond with the
terminal identifications of your plug, connect as
follows:
Blue wire to terminal coded N (Neutral) or
coloured Black. Brown wire to terminal coded L
(Live) or coloured Red.
Connection to the mains suppiy |
MAINS POWER SWITCH
The mains power switch is located on the rear
connector panel, Setting this switch to OFF
removes all applied power from the unit.
1.2 FEATURES
® PAL/SECAM switchable colour system with a three-
position switch for PAL, AUTO and SECAM.
@ Compact, lightweight and handy to use.
®@ A G-inch (13-cm viewing area) in-line black stripe
picture tube capable. of accurate, well-defined
colour reproduction.
@ Flexible AC/DC power supply — household AC or
built-in exclusive rechargeable battery pack —
enabling both indoor or outdoor use.
@ Built-in speaker enabling simultaneous audio and
video monitoring.
@ Dual circuits provided for audio and video signals.
® An LED indicator to warn of jow battery power.
® Recharging of the exclusive battery pack PBP-1
(optional) is possible with the AA-PATEG/EK/S AC
Power Adapter (optional).

1.3. SPECIFICATIONS
: Colour video monitor
: PAL/SECAM switchable
+6” (13-cm viewing area)
2 110/427/220/240 V AC, 50 Hz
12 V DC {exclusive battery
pack PBP-1}
: 26 W (AC)
14 W (DC) {about 1.5 hours
with a fully charged battery
pack)
11 Vp-p (2 circuits}
Input impedance — OPEN/75
ohms selectable
1 Vp-p, 75 ohms
—6 dBs (more than 50 k ohms)
1-6 dBs
: 77 mm dia, (16 ohms)
+ 500 mW
110° C to +40° C
: 10° C to 70° C
: 22.0(W) x 13.5(H) x34.5(D) cm
r4..kg
: Hood, Power cord, Earphone
Auilio cable, Video cable
Type
Colour system
Picture tube
Power requirement
Power consumption
Video input
Video output
Audio input
Audio output
Built-in speaker
Speaker output
Operating temperature
Storage temperature
Dimensions
Weight
Accessories
Design and speciticarians subject to change without notice,
1.4 PRECAUTIONS
vent inflammables, water and metallic objects
: entering the unit.
® Do not remodel or disassemble the unit. As the unit
incorporates circuitry generating high voltage,
physical danger and malfunctioning of the unit itself
may result.
@ Remove the AC power cord from the AC outlet when
you are not using the unit for a long period.
@ Do not damage the power cord, This could result in
electric shock,
1:5 HANDLING
® Do not apply shocks or vibrations. Malfunctioning of
the unit is likely to result,
@ Do not place the unit near appliances generating
strong electric or magnetic fields.
Noisy or unstable pictures are likely to result.
® Do not use it in extremely hot places. Exposed to the
direct sunlight for a !ong period of time or placed
near a heater, the cabinet could become deformed, or
1-2
the performance of the internal components may
deteriorate. Special attention is required in summer.
Inside a closed car the temperature can climb to as
high as 80° C in the summer sun.
@ Keep the monitor clean by wiping the cabinet and the
CRT screen with a piece of soft cloth. Do not apply
thinner or benzine. These chemicals can damage the
surface finish and cause printed letters to be erased
Ciean excessive soiling with a diluted neutral cleanser,
then wipe away the cleanser with a dry cloth.
® Do not block the ventilation slots.
For outdoor usage
Apply a screen hood (provided) outdoors to eliminate
reflections
The monitor can be inclined by erecting the stands on
the bottom,
Fig. 1-7
1.6 CONTROLS AND CONNECTORS
1. BRIGHTness control knob
Tur counterclockwise to darken the picture and
clockwise to illumine it.
2. CONTRAST control knob
Tum counterclockwise to soften contrast anc
clockwise to sharpen.
3. COLOUR control knob
Turn clockwise to deepen the colour tone and vice
versa.
4. TINT control knob
Turn counterclockwise to emphasize reds and
clockwise to emphasize greens, Normally set this
knob to its center click-stop position.
5, EARPHONE jack.
Plug in the provided earphone; audio monitoring is
possible.
6. BATT ALARM indicator
This iamp lights green while the unit is being
operated on AC power. If this lamp lights red
during battery operation, it indicates that the
battery pack installed in the unit is nearing the end
of its power. Immediately recharge the battery
pack or replace it with @ fresh one.

Fig. 1-2 {a}
13°14
15 16
Fig. 1-2 (b)
INPUT SELECT “VTR™ switch
Push this switch to monitor audio and video
signals from a unit connected to the VTR input
terminals of the rear panel.
INPUT SELECT “LINE” switch
Push this switch to monitor audio and video
signals from a unit connected to the LINE input
connectors B and @4) on the rear panel.
OFF/VOLUME control knob
Turn this switch clockwise dill it clicks for power-
ing the TM-44EG/EK. By turing the knob further
you can adjust the volume of the audio. Turn the
knob fuliy counterclockwise to remove power
from the.unit. Make it a rude to put this switch in
the OFF position after operating the unit and
before recharging the installed battery pack.
10.
Ww.
12,
13.
7
Battery compartment
Install the exclusive PBP-1 battery pack (optional)
here.
MAINS POWER switch
Switching ON applies mains power to the set. To
switch off the set completely, set the power switch
to OFF,
AC IN © socket
Using the provided AC power cord, connect the
AC IN terminal of the monitor to an AC outlet.
When this terminal is being used, the installed
battery cannot be employed. Make it a rule to
unplug the power cord from this terminal when
employing the exclusive battery pack.
VOLTAGE SELECTOR
To reset the operating voltage, see “POWER
SYSTEM” page 1-1.

15.
16.
17,
18,
19,
20.
24.
22,
23.
24.
25.
26,
27,
DC IN 12 V/CHARGE socket
Recharging the installed battery pack is possible
by connecting the DC output plug of the AA-
P41EG/EK/S AC Power Adapter to this terminal.
H. HOLD control
Turn counterclockwise when the picture is slanting
to the right and clockwise when slanting to the
left.
V.HOLD control
Turn in either direction to stop vertical rolling of
the picture.
HEIGHT control
Turn in either direction to adjust the picture if
it's too narrow or elongated, using a screwdriver,
VTR (8-pin) connector
Connect the monitor to the video/audio monitor
terminal of a VTR or other video sources.
VTR 75 22 termination switch
Set this switch to 75 Q to terminate the input
signals of the VTR connected to the 8-pin
connector (8) or set it to OPEN to make these
signals available at the VTR AUDIO and VIDEO
inpuvVoutput connectors @Q and QD .
VTR AUDIO input/output DIN socket
VTR VIDEO input/output connector
Connect the audio and video outputs from a video
tape recorder or other video sources to these two
connectors. Or use these connectors to produce
signals bridged from the VTR connected to the
8-pin connector B
PAL/AUTO/SECAM colour system select switch
PAL: — Set to this position when the input signal
conforms to PAL.
AUTO: The circuit is automatically switched
either for PAL or SECAM depending on
the input signal. This position is sufficient
for most purposes.
SECAM: Set to this position when the input signal
conforms to SECAM,
VIDEO LINE IN
AUDIO LINE IN DIN connector
Connect the audio and video outputs from a video
tape recorder or other video sources to be
monitored to these two connectors.
OUTPUT VIDEO connector
OUTPUT AUDIO DIN socket
Use these connectors to produce audio and video
signals being monitored with the front panel input
select switches or bridged from the LINE
connectors @3 and @3) .
75 Q termination/OUTPUT select switch
Set this switch to 75 82 to terminate the input
signals connected to the LINE VIDEO IN and
AUDIO IN connectors @3 and @4) . Or set this
switch to OPEN BRIDGE OUT when you wish to
make avilabie at the OUTPUT VIDEO and AUDIO.
connectors @5 and @6) signals connected to the
LINE connectors @3 and @4) .
(“Fe smionitor etgnals applied to the &-pin VTR
connector’
(8
or
the
audio
and
video
inpury
|
output connectors @Q and @}) , push the front
penel INPUT SELECT “VTR” switch,
|
To
monitor
signals
applied
to
the
video
and
|
audio
LINE
connectors
@3
and
@4
,
push
the
!
front panel INPUT SELECT “LINE” switch.
1.7 POWER SUPPLY
Using an AC outlet
Plug the provided power cord into an AC outlet.
Fig. 1-3
The monitor cannot be powered from the battery ]
pack if the power cord is plugged into the |
Monitor. Make sure the power cord is discon- |
nected from the monitor before the battery pack |
is used.
i 7 J
Installing the exclusive PBP-1 battery pack:
1.
Loosen
the
screw
of
the
battery
compartment
cover
on
the
rear
panel
of
the
unit
and
remove
the
cover.

2. Insert the battery pack with its cord outward and Power Adapter can recharge two PBP-1. battery packs
the blue ribbon on top of the battery pack. simultaneously; one installed inside the monitor and the
other separate from the unit — a spare battery.
ee : 1. Plug the provided power cord into the AC IN
terminal of the AA-P41EG/EK/S. Connect the AC
Power adapter to an AC power supply.
2. When the battery pack installed within the
monitor is to be recharged, connect the DC output
cable of the adapter to the DC IN 12 V/CHARGE
connector,
3. The monitor should be set to OFF. The battery
cannot be recharged unless the OFF/VOLUME
Fig,
1-5
control
knob
is
positioned
at
OF
F.
3. Plug the battery cord into the socket near the
opening and replace the cover,
Fig. 1-8
4, When a spare battery pack is to be recharged
simultaneously, connect the PBP-1 battery pack to
the EXT BATTERY terminal of the adapter,
— ca
If the BATT ALARM indicator should tight red
after installing the battery pack, recharge or
replace the battery pack with a fresh one, A
battery pack running out of power should be
recharged immediately.
Fig. 1-9
1.8 RECHARGING THE PBP-1 BATTERY PACK 5. Set the adapter’s power switch to ON. Recharging
will begin.
The AA-P4TEG/EK/S AC Power Adapter is required to 6. Check the charging condition with the meter
rechange the exclusive PBP-1. The AA-P41EG/EK/S AC provided on the adapter.
Fig. 1-7

Meter select switch
VCR BATTERY:
to check the charging condition of the battery pack
installed in the monitor.
EXT BATTERY:
to check the charging condition of the battery pack
directly connected to the AC power adapter.
NOTE:
® About 8 hours are required to fully charge the
5 battery pack, However, it is recommendable to con-
How to check the charging condition tinue charging a little longer fabout 10—12 hours).
1. The meter needle deflects to the right when
charging
starts.
Exclusive
PBP-1
battery
pack
® Do not short-circuit the outer rim of the piug to ‘ts
centre pin.
@ Even when you are not using the battery pack for a
long period of time, recharge it from time to time
This is because the battery pack will gradually dis-
Fig.1-11 charge by itself.
e @ Ajways recharge the battery pack after use and store
2. The meter needle deflects towards the left as it 100% charged.
charging proceeds. @ Once the battery pack is fully discharged, it becomes
unusable.
@ The PBP-1 is a lead/acid battery. Therefore, when it is
used at temperatures below 5° C (41° F), its capacity
may be reduced as much as half.
Fig. 1-12 aft
3. When the meter: needle points to FULL, the
battery has been fully charged,
on
Plug 1
1.9 CONNECTIONS
Using in combination with a JVC VHS recorder
The TM-41EG/EK is most convenient when you use it in
combination with a portable recorder and camera to
Fig. 1-14 monitor camera work when operating outdoors.
Meter select switch

To VIDEO
To VTR VIDEO input/
ouTeuT VIDEO cable output connector
HD- I
<cl>. cod
To AUDIO AUDIO cable To VTR AUDIO input/
OUTPUT output DIN socket
758 OPEN .
To AUDIO FoVIR-AUDIO inplit/
| output AUDIO cable output DIN socket
90000 | ge
a Beer
ToVIDEO —- VIDEO cable To VTR VIDEO input/
OUTPUT
output connector
Fig, 1-16
Hy
©
For
monitoring,
press
the
INPUT
SELECT
“VTR”
For monitoring, press the INPUT SELECT “VTR”
switch on the front panel.
switch on the front panel.
Using in combination with a video recorder having an
8-pin VTR connector
@ To obtain bridged outputs from a source applied to
the connectors to the right, shift this switch to
Caution
No video/audio output is available from the
8-pin VTR connector. Recording directly from
this connector is not possible.
OPEN. Leave this switch at 75 Q in other cases.
eau
NLA
TURE
seu ‘
Han ie WE
Jammin > sae
To VTR
connector
To VTR
(8-pin}
connector
Bridged output
Fig. 1-17

Using both the VTR and LINE circuits
VTR bridged
output
LINE bridged
output
]
‘i
)
For monitoring the system connected to the VTR con-
hector, press the INPUT SELECT “VTR” switch and,
Fig, 1-18
panel.
for the system connected to the LINE connectors, press
Operation chart (the numbers correspond to those shown in the above illustration)
the INPUT SELECT “LINE” switch, both on the front
Input connectors
Termination switch |
Input select
switch on the
front panel
or
Bridged output
Switched output
|
Apply input signals
to both (1) and @)
(?) VTR ~ ~
Apply input ie)
signals. 752 |
| |
i {
‘ VTR - }
Apply ‘input { | video bridged 1
1 signals. ! outputs available i
pest a pou tputs
(3) |
| VTR - -
| i
Apply input signals, 752 |
> 9
\ £5) j LINE =
i | Bridged
Apply input signats. ; BRIDGE OUT outputs available
@ ) |
—_—_ — 6
VTR or LINE ce Outputs
selected by the input
select switch available
1-8

SECTION 2
DISASSEMBLY
2.1 TOP COVER
Take out 6 screws @ shown in Fig: 2-1. Gently press
the top of the front panel in the forward direction and
open the top cover. Disconnect connector (A) (see Fig.
2-2) of the battery case from the power supply board,
then remove the top cover,
2.2 POWER CORD ASSEMBLY
Take out 2 screws @) shown in Fig. 2-3. Raise the power
supply board assembly upward to remove.
2.3 FRONT PANEL
Remove the top cover. Disconnect the CRT socket, CRT
ground, anode cap and deflection yoke, Take out 2
screws @ shown in Fig, 2-4 and remove the front panel.
2.4 CRT
Remove the front panel. Take out 4 screws (1) shown in
Fig. 2-5 and remove the CRT.
2.5 CONTROL BOARD ASSEMBLY
After the front panei has been removed, pull off 5 con
trol knobs, Take out 2 screws @ shown in Fig, 2-5.
The control board assembly can then be removed.
Fig. 2-5
2-1

2.6
MAIN
BOARD
2.8
VIDEG/AUDIO
BOARD-2
Remove
the
power
supply
assembly
and
front
panel
(see
In
the
same
manner
as
step
7,
unsoider
the
points
shown
steps
2
and
3}.
Take
out
5
screws
@
shown
in
Fig.
26
by
the
arrows
in
Fig.
2-8
and
remove
the
board.
and
remove
the
main
board,
Fig. 2-6
2.7 VIDEO/AUDIO BOARD-1
Remove the top cover and the jack board assembly,
Unsolder the points shown by arrows in Fig. 2-7 and
remove the board.
2-2

SECTION 3
ALIGNMENT PROCEDURE
3.1. BI VOLTAGE (10.5 V}
Measure the voltage between TP-91 of the power supply
and ground. Adjust R501 {B1) to obtein 10.5 V. See
Fig. 3-1.
+) Be sure to perform this adjustment before pro-
ceeding to other repairs and adjustments.
2) Use a good quality voltmeter {internal resistance
at least 20 k{2;V) to perform measurement.
3.2 PAL COLOR CIRCUIT ADJUSTMENT
1, Test Equipment and Tools
Dual trace oscilloscope {with X-Y input facilities)
PAL color bar generator
Bias power source
Insulated adjusting rod
Short jumper wire
Grey receptacte wire
Fig. 3-2
2. Adjustment Steps
4) Supply @ PAL color bar signal.
2) Connect the X probe of the oscilloscope to U4 of
TRC-5210A and the Y probe to US. Observe the
Lissajous pattern as shown in Fig. 3-3.
Oscilloscope
Fig. 3-3
3} Connect jumper wire between TP3 and TP4.
4) Supply approx. 3.7 V DC bias to TP1.
5) Turn ROG (DL AMP} and, as shown in Fig. 3-4,
adjust to where waveform A changes to waveform
B.
— —-
Adjust Adjust
R06 T02
{A} {B) (c}
Fig. 3-4
6} Turn the core of TO2 (DL P. TRANS} to change
waveform B to waveform C.
7) Adjust C10 trimmer capacitor to set color sync.
3-1

3.3 SECAM COLOR CIRCUIT ADJUSTMENT
1. Test Equipment and Tools
Oscilloscope
SECAM color bar generator
VTIVM
Insulated adjusting rod
2. Adjustment Steps
1) Supply a SECAM color bar signal.
2) Connect oscilloscope probe to TPS and, as shown
in Fig. 3-5, adjust the core of T3 to align the peaks
of the waveform.
Fig. 3-5
3) Disconnect the grey receptacle wire from TRC-
5210A.
4) Connect VTVM between TP6 (+) and TP? (—).
Adjust the core of T04 for maximum (approx.
1 Vp-p) at both ends, At this time, confirm normal
color bar phase,
5) Observe the waveform at the coupling point be-
tween L710017 and C1005. Adjust the core of TO6
‘to set the retrace evel as shown in Fig. 3-6
LL
A
(B)
on
rir
Fig. 3-6
6) Observe the waveform at the coupling point be-
tween 11002 and C1G05. Adjust the core of TOS
to set the retrace level as shown in Fig, 3-7.
3-2
Fig. 3-7
3.4 PURITY
1) Display a monochrome pattern
2) As viewed from the back (see Fig. 3-8}, turn the
magnet lock counter-clockwise to loosen it.
Purity magnet
6 pole convergence Yoke retaining clamp
Yoke iocking ring Def. yoke
4 pole convergence
Fig. 38

3) Turn the green cutoff VR fully clockwise and the
red and blue cutoff VRs fully counter-clockwise.
Adjust the screen VR so that the vertical green
band becomes easy to see.
Screen VR
Green
band
Adjust to center green band
Fig. 3-11
Change the service lead connection from the
normal to the SERVICE position to obtain a single
horizontal line. Confirm that the vertical center
position does not deviate. If deviation occurs,
while keeping the same relative opening between
the magnets, turn both magnets and adjust to
center the line as closely as possible (Fig. 3-12).
7)
G Drive VR B Cutoff VR
R Drive VR R Cutoff VR
G Cutoff VR
Fig. 3-9
4) Loosen the deflection yoke securing screw and
slide the yoke fully rearward to obtain color shad-
ing in the green band.
5) Overlap the long and short purity magnet tabs and 8)
position them horizontally {see Fig. 3-10).
9)
10)
Long short Short long
Q 11)
Position horizontafly
Fig. 3-10 3.6
6) Open and close the two purity magnets {scissor 1)
fashion) and adjust so that the green band is
positioned at the center of the picture,
White center marker
Align line with white markers (within 5 mm)
Fig. 3-12
Repeat above steps 6 and 7.
Return the service lead to its normal position.
Slide the deflection yoke forward and adjust its
position so that the green color completely fills
the picture area.
Confirm that both red and biue single color resters
can also be obtained.
Without moving the deflection yoke, tighten its
securing screw. Tighten the magnet lock lightly
so that there is no movement when the 6 pole
magnets are lightly touched.
CONVERGENCE
Employ a crosshatch pattern and adjust the bright-
ness so that the image is clear, but slightly
darkened.
3-3

2) Tum the red and blue cutoff VRs fully clockwise 3.6 WHITE BALANCE
and the green cutoff VR fully counter-clockwise.
Adjust the screen VR for an easily seen image SERVICE
(see Fig. 3-9).
Service lead connection
Fig, 3-15
1} Display a monochrome pattern.
2) Change the service lead connection to’ the
SERVICE position to obtain a single horizonta:
Fig. 3-13 line, (See Fig, 3-15),
3) Turn the red, blue and green cutoff VRs and the
screen VR fully counter-clockwise to eliminate
luminance (see Fig. 3-9).
3) Turn the two 4 pole convergence magnets and
adjust so that red and blue become overlapped
throughout the picture area to yield magenta {Fig.
3-13). 4) Gradually turn the screen VR clockwise to wher
4) Turn the green cutoff VR full clockwise and adjust single line of one of the colors appears,
the two 6 pole convergence magnets so that the 5) Tur the cutoff VR of this color clockwise abou
green and magenta become overlapped throughout 10 degrees.
the pleture:aree to yield white (Fig. 3-14). 6} ‘Again turn the screen VR so that this colo-
appears only faintly
7) Adjust the other cutoff VRs so that the horizonte
line becomes white.
8) Return the service lead to the normal position.
9) With a dark picture, perform fine adjustment te
obtain optimum white balance.
10) With a bright picture, adjust the red and gree-
drive VRs for optimum white balance.
Fig. 3-14 3.7 SUBCONTRAST AND SUB-BRIGHTNESS
* After completing purity and convergence adjustments;
Disptay a picture and set the front panel contrast anc
brightness controls to the center click positions, Adjus7
R116 (subcontrast) and R133 (sub-brightness) of the
2) Tighten the deflection yoke screw securely. main board for optimum display.
1) Turn magnet lock clockwise {as viewed from rear
of set) and tighten securely.
3-4

3.10 V. CENTER
feet Turn R324 (V. center) to adjust picture center.
:
V. Center VR
; os
=
Eley t :
feed
Ree es opie
Se
Subcontrast VR
Sub-brightness VR
Subcolor VR
Fig. 3-16
3.8 SUBCOLOR
3.11 FOCUS
Display a fleshtone pattern and set the front panel tint
and color controls to the center click positions. Turn Turn R420 (focus) and adjust for the range of optimum
R1030 (subcolor) of the main board and adjust for most overall picture focus, Within this range, set the VR to
natural fleshtone display. the most clockwise position. Also confirm that focus is
obtained with a dark picture,
Focus VR
3.9 V. HEIGHT AND H. WIDTH
Display a pattern which allows easy confirmation of
symmetry (such as a circle or crosshatch), Adjust R311
(V. height) and the core of L402 (H. width} for opti-
mum size relationships.
V. Height VR -H, Width Coil
3-5

SECTION 4
REPACKING
ae
Part
No.
Part
Name
Description
1
|
AP3279-018
Poly
Cover
2
| AP1301-001
Cushion
3
|
AP1301-002
au
4
|
AP3412-4
Packing
Case
TM-41EG
AP3412-5
Hs
TM-41EK
5
| PU30425-309
Instruction
Book
PU47353
Video
Cable
PU49200
Audio
Cable
A32200-004
Hood
Accessories
QME1308-009
Earphone
QPGA015-02005
|
Poly
Bag
Zy
6 |
OMP3950-183
Power
Cord
TN-41EG
A
PU46128
-
TM-41EK
QPGA015-02005
|
Poly
Bag
Parts identified by the A\ symbol are critical for sefety. Replace only with specified part numbers.
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