Sanyo VMC8618, VMC8619P User Manual

SERVICE MANUAL

FILE NO.

Color Video Monitor

CONTENTS

SPECIFICATIONS .................................................................... 3

1. OPERATING INSTRUCTIONS ............................................. 4

2. SERVICE ADJUSTMENTS ................................................... 6

3. PARTS LIST ....................................................................... 10

CIRCUIT DIAGRAMS

VMC-8618

(Product Code : 114 950 71)
(U.S.A, Canada)

VMC-8619P

(Product Code : 114 950 74)
(Europe)

(Product Code : 114 950 76)
(U.K.)

(Product Code : 114 950 78)
(Australia)

NOTE: 1. Parts order must contain model number, part number, and description.

2. Substitute parts may be supplied as the service parts.

3. N.S.P. : Not available as service parts.

Design and specifications are subject to change without notice.

L8MV5/US,XE,UK,AU

REFERENCE No.SM5310261

SAFETY PRECAUTIONS

WARNING:

Service should not be attempted by anyone unfamiliar with the necessary precautions for this recording or playback
equipment. The following precautions are necessary during servicing:

1. Many electrical and mechanical parts in this recorder have
special safety-related characteristics for providing protec­tion against shock, fire and other hazards. These charac­teristics often go unnoticed in a visual inspection, and the
protection afforded by them cannot necessarily be ob­tained by using replacement components with higher rat­ings (voltage, wattage, etc.).

2. Replacement parts having special safety-related charac­teristics are identified in this manual, and in the schematic
diagrams, by the symbol ! . These components have
values that are of special significance to product safety.
Should any component (identified by the symbol ) need
to be replaced, use only the part designated in the parts
List. Do not deviate from the specified resistance, wattage,
and voltage ratings.

Video

Monitor

3. Before returning the set to the customer, always perform an
AC leakage current check on the exposed metallic parts of
the cabinet, such as terminals, screwheads, metal over­lays, etc. to be sure that the set is safe to operate without
the danger of electrical shock, Plug the AC line cord directly
into a 120 V AC outlet. (Do not use a line isolation trans­former during this check.) Use an AC voltmeter with a
sensitivity of 5000 ohms per volt (or more) as follows:
Connect a 1500 ohms, 10 watt resistor, paralleled by a 0.15
mfd, 150 VAC capacitor, between a known good earth
ground (water pipe, conduit, etc.) and the exposed metallic
parts, one at a time. Measure the AC voltage across the
1500 ohms resistor and 0.15 mfd capacitor combination.
Reverse the AC plug at the AC outlet and repeat the AC
voltage measurements for each exposed metallic part. The
measured voltage must not exceed 300 mVrms. This
corresponds to 200 µA AC. Any value exceeding this limit
constitutes a potential shock hazard and must be corrected
immediately.

4. Fuse symbol marks.
For CANADA

For U.S.A.

Fuse rating is marked at
adjacent fuse.

UNDERWRITERS LABORATORIES Standard

CAUTION "Risk of fire-replace fuse as marked"

– 2 –

SPECIFICATIONS

Color system :

Picture tube :

Resolution :

Input terminals :

Outout terminals :

Overscan or underscan selection:

Audio output :

Speaker :

Power source :

Power consumption :

Ambient operating temperature :

Ambient operating humidity :

Dimension (W x H x D ) :

Weight :

PAL/NTSC, selected automatically

18 incht (VMC-8618) , 19 incht (VMC-8619P)

More than 800 TV lines

Separate Y/C signal, mini-DIN 4-pin connector (1)

Y signal: 1.0 Vp-p, 75 ohm negative sync

C signal: 0.286 Vp-p, 75 ohm negative sync, bridge connection possible

Composite sync signal: 1.0 Vp-p, 75 ohm BNC connector (2)

Audio signal: -6dBs (400 mVrms), RCA pin (3), bridge connection possible

Separate Y/C signal, mini-DIN 4-pin connector (1)

Y signal: 1.0 Vp-p, 75 ohm negative sync

C signal: 0.286 Vp-p, 75 ohm negative sync, bridge connection possible

Composite sync signal: 1.0 Vp-p, 75 ohm BNC connector (2),

automatic temination setting

Audio signal: -6dBs (400 mVrms), RCA pin (3), bridge connection possible

YES

1 W

Variable round x 1

100 to 240 V AC, 50/60 Hz

95 Watts

-10 °C to 45 °C storage temperature

10 % to 90 %

448 x 443 x 447 mm

25kg

Dimensions

W

D

H

Fig. 1

– 3 –

1. OPERATING INSTRUCTIONS

1-1. FRONT PANEL CONTROLS

1

1. Speaker

When the monitor selector button (A, B or Y/C)

is pressed, the speaker lets you hear the sound

from the components which are connected to

the terminals at the rear of the monitor. (Use

components which produce audio output.)

2. On-screen display button (OSD)

When this button is pressed, the menu screen

appears on the monitor screen.

1.COLOR

2.TINT

3.BRIGHTNESS

4.CONTRAST

6.VOLUME

8.LANGUAGE

9.TITLE

10.VERSION

5.SHARPNESS

3. Cursor ( ) button ( )

When this button is pressed, the cursor moves

down. When it reaches the bottom, it reappears

at the top. In addition, this button is used to

make adjustment values smaller.

4. Cursor ( ) button ( )

When this button is pressed, the cursor moves

up. When it reaches the top, it reappears at the

bottom. In addition, this button is used to make

adjustment values larger.

5. Display selector button (ENTER)

If this button is pressed while a picture is on the

monitor screen, the screen changes to the

adjustment screen. If the button is pressed once

more, the picture returns to the previous screen.

245 6

3F

SCAN

7

8

G

9

Fig. 2

6. Underscan/overscan select button (SCAN)

The initial setting is for the normal screen

(overscan). If the SCAN button is pressed, the

screen will become smaller (underscan) than

the normal screen. Change this setting in cases

such as when screen display characters are

missing. If the CSAN button is pressed once

more, the normal screen is display again.

7. Monitor A selector button (A)

When this button is pressed, the audio and

video input changes to the component which is

connected to the A terminals at the rear of the

monitor.

8. Monitor B serector button (B)

When this button is pressed, the audio and

video input changes to the component which is

connected to the B terminals at the rear of the

monitor.

9. Monitor Y/C selector button (Y/C)

When this button is pressed, the audio and

video input changes to the component which is

connected to the Y/C terminals at the rear of the

monitor.

10. Power indicator (POWER)

Lights when the power is on.

11. Power button (POWER)

Press this button to turn the power on and off.

– 4 –

1-2. REAR PANEL CONTROLS & CONNECTION

1

Fig. 3

1. AC INPUT socket

Connect the AC power cord (supplied) securely

to this socket and to a wall outlet.

2. Rear A terminals (AUDIO/VIDEO A terminals)

When the monitor A selector button at the front

of the monitor is pressed, the audio and video

signals from the component which is connected

to these terminals can be monitored.

3. Rear B terminals (AUDIO/VIDEO B terminals)

When the monitor B selector button at the front

of the monitor is pressed, the audio and video

signals from the component which is connected

to these terminals can be monitored.

4. Rear Y/C terminals (AUDIO/VIDEO Y/C

terminals)

When the monitor Y/C selector button at the

front of the monitor is pressed, the audio and

video signals from the component which is

connected to these terminals can be monitored.

23 4

Y/C (Mini DIN 4 pin) terminal specification

OUT

4

2
4

2

3

1
3

1

IN

Pin No. Signal

1 GND (Y)

2 GND (C)

3Y

4C

Fig. 4

– 5 –

2. SERVICE ADJUSTMENTS

1. Supply power to the set and measuring instruments and allow to warm up for at least 30 minutes.

NOTE

Be sure to use a non-metallic driver for adjusting there VRs. A metallic driver can cause damage by shorting.

Adjustment tool

1. Digital multi meter

2. Pattern generator

3. Color analyzer

Adjustment mode

Over scan mode

ADJUSTMENT
ITEM

CHECK B+
VOLTAGE

HOLD DOWN
VOLTAGE
SETTING

FOCUS
ADJUSTMENT

HORIZONTAL
PHASE
ADJUSTMENT

HORIZONTAL
SIZE
ADJUSTMENT

TIMING
PATTERN

PATTERN GENERATOR
MONOSCOPE PATTERN

PATTERN GENERATOR
MONOSCOPE PATTERN

PATTERN GENERATOR
MONOSCOPE PATTERN

PATTERN GENERATOR
MONOSCOPE PATTERN

PATTERN GENERATOR
MONOSCOPE PATTERN

SETTING

BRIGHT VR and
CONTRAST VR
TO MAX.

BRIGHT VR and
CONTRAST VR
TO 75%.
SHARPNESS
VR TO MAX.

BRIGHT VR ,
CONTRAST VR
and SHARP­NESS VR TO
MAX.

FACTRY
PRESETTING

VR
LOCATION

VR503

FTB FOCUS
VR1 and VR2

VR401

VR306

ADJUSTMENT PROCEDURE

TEST POINT : D901(-)
DIGITAL VOLT METER
VALUE 38.0 ± 0.5 VDC.

TEST POINT : ZD501(-)
DIGITAL VOLT METER
VALUE 8.35 ± 0.1 VDC.

Adjusting FBT Focus VR1,2 make focus
resolution of reach over 800TV lines, four
corners must be aiso clear.

Adjusting VR401 horizontal phase make
right and left of picture to <=1%.

Adjusting VR306 make signal side of
picture of scale at 1.5 ± 0.5 position.

VERTICAL
LINEARY
ADJUSTMENT

VERTICAL
CENTER
ADJUSTMENT

VERTICAL
SIZE
ADJUSTMENT

PATTERN GENERATOR
MONOSCOPE PATTERN

PATTERN GENERATOR
MONOSCOPE PATTERN

PATTERN GENERATOR
MONOSCOPE PATTERN

BRIGHT VR ,
CONTRAST VR
and SHARP­NESS VR TO
MAX.

BRIGHT VR ,
CONTRAST VR
and SHARP­NESS VR TO
MAX.

FACTRY
PRESETTING

– 6 –

VR302

VR303

VR301

Adjusting vertical linear control VR302 for
equal spacing of lines between center
extreme of scan [(Max-Min)/Aver­age]<=10%.

Adjusting vertical center control VR303 to
<=1%.

Adjusting vertical size control VR301
make signal side of scale is 1 ± 0.3
position.

ADJUSTMENT
ITEM

WHITE BAL­ANCE AD­JUSTMENT
AT VMC-8618

TIMING
PATTERN

PATTERN GENERATOR
NO SIGNAL

SETTING

BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.

VR
LOCATION

VR801,VR803,
VR805,
FBT FOCUS
VR

ADJUSTMENT PROCEDURE

Adjust VR805 G-Bias to center.
Adjust FBT screen VR make luminance
without video to 1.0 ~ 1.5 FL.
Adjust VR801 make X value is 0.281 ±

0.015.
Adjust VR803 make Y value is 0.298 ±

0.015.

WHITE BAL­ANCE AD­JUSTMENT
AT VMC-8619P

LUMINANCE
ADJUSTMENT

PATTERN GENERATOR
FULL WHITE

PATTERN GENERATOR
NO SIGNAL

PATTERN GENERATOR
FULL WHITE

PATTERN GENERATOR
NO SIGNAL

BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.

BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.

BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.

BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.

VR804,VR802,
VR501

VR801,VR803,
VR805,
FBT FOCUS
VR

VR804,VR802,
VR501

FBT SCREEN
VR

Adjust VR501 make luminance with video
signal to 38 ~ 42 FL.
Adjust VR804 make X value is 0.281 ±

0.015.
Adjust VR802 make Y value is 0.298 ±

0.015.

Adjust VR805 G-Bias to center.
Adjust FBT screen VR make luminance
without video to 1.0 ~ 1.5 FL.
Adjust VR801 make X value is 0.313 ±

0.015.
Adjust VR803 make Y value is 0.329 ±

0.015.

Adjust VR501 make luminance with video
signal to 38 ~ 42 FL.
Adjust VR804 make X value is 0.313 ±

0.015.
Adjust VR802 make Y value is 0.329 ±

0.015.

Adjust FBT screen VR make luminance
without video signal is 1.0 ~ 1.5 FL.

PINCUSHION
ADJUSTMENT

PATTERN GENERATOR
WINDOWS PATTERN

PATTERN GENERATOR
FULL WHITE

PATTERN GENERATOR
CROSSHATCH PATTERN

BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.

BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.

BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.

VR501

VR502

VR305

Adjust VR501 make luminance is 38 ~ 42
FL.

Adjust VR502 make luminance is 85 ± 3
FL.
Then make sure Full White luminance
whether it is 38 ~ 42 FL.

Adjust VR305 make V-Linearity of picture
is in the best condition.

– 7 –

The way of adjusting it which a color analyzer is not used for.

ADJUSTMENT
ITEM

WHITE BAL­ANCE AD­JUSTMENT
and
LUMINANCE
ADJUSTMENT

TIMING
PATTERN

PATTERN GENERATOR
NO SIGNAL

PATTERN GENERATOR
FULL WHITE

SETTING

BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.

BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.

VR
LOCATION

VR801,VR802,
VR803,VR804,
VR805,
FBT SCREEN
VR

VR804,VR802,
VR501

ADJUSTMENT PROCEDURE

VR801,VR802,VR803,VR804 and VR805
is center position.
Adjust the VR801, VR803 and FBT
SCREEN VR to dark gray with screen.

Adjust the VR802 and VR804 to white
gray with screen.
Adjust the VR501 it makes the screen of
the monitor proper brightness.

– 8 –