Sanyo VM-6612 User manual

VM-6612
FILE NO.
REFERENCE No.SM5310263
L8MAB/US,XE,UK,AU
NOTE: 1. Parts order must ontain model number, part number, and des ription.
2. Substitute parts may be supplied as the servi e parts.
3. N.S.P. : Not available as servi e parts.
Design and spe ifi ations are subje t to hange without noti e.
(Product Code : 114 901 21)
(U.S. , Canada)
SERVICE M NU L
B/W Video Monitor
CONTENTS
SPECIFICATIONS .................................................................... 3
1. OPERATING INSTRUCTIONS ............................................. 5
2. SERVICE ADJUSTMENTS ................................................... 7
3. PARTS LIST ......................................................................... 9
4. CIRCUIT DIAGRAMS ......................................................... 13
(Product Code : 114 901 24)
(Europe)
VM-6612P
(Product Code : 114 901 26)
(U.K.)
(Product Code : 114 901 28)
( ustralia)

– 2 –
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. any electrical and mechanical parts in this recorder have
special safety-related characteristics for providing protec-
tion against shock, fire and other hazards. These charac-
teristics often go unnoticed in a visual inspection, and the
protection afforded by them cannot necessarily be ob-
tained by using replacement components with higher rat-
ings (voltage, wattage, etc.).
2. Replacement parts having special safety-related charac-
teristics 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.
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 over-
lays, 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 trans-
former 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. easure 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
UNDERWRITERS LABORATORIES Standard
CAUTION "Risk of fire-replace fuse as marked"
For U.S.A.
Fuse rating is marked at
adjacent fuse.
Video
Monitor

– 3 –
EIA standard
12˝ measured diagonally, 90° deflection angle
ore than 800 TV lines (center)
Horizontal: 15.75 kHz (EIA), Vertical: 60 Hz (EIA)
Composite video: 1 line, BNC connector, 1.0 V p-p 75 ohm negative sync
Composite video: 1 line, BNC connector, 1.0 V p-p 75 ohm negative sync
Composite video: 1 line, BNC connector, 1.0 V p-p 75 ohm negative sync
Composite video: 1 line, BNC connector, 1.0 V p-p 75 ohm negative sync
Sub bright volume
Vertical size volume
Vertical hold volume
anual switchable, Hi/ 75 ohm (Lo)
Temperature: -10 °C to 40 °C, Humidity:10% to 90 %
AC 100 to 240 V 50/60 Hz
30 Watts
304 x 320 x 310 mm
7.5 kg
SPECIFICATIONS
VM- 12
System :
Picture tube :
Resolution :
Scanning frewuency :
Input terminals :
VIDEO A
VIDEO B
Outout terminals :
VIDEO A
VIDEO B
Sub Adjusting control :
Termination switch :
Operating environment :
Power source :
Power consumption :
Dimension (W x H x D ) :
Weight :
CCIR standard
12˝ measured diagonally, 90° deflection angle
ore than 800 TV lines (center)
Horizontal: 15.625 kHz (CCIR), Vertical: 50 Hz (CCIR)
Composite video: 1 line, BNC connector, 1.0 V p-p 75 ohm negative sync
Composite video: 1 line, BNC connector, 1.0 V p-p 75 ohm negative sync
Composite video: 1 line, BNC connector, 1.0 V p-p 75 ohm negative sync
Composite video: 1 line, BNC connector, 1.0 V p-p 75 ohm negative sync
Sub bright volume
Vertical size volume
Vertical hold volume
anual switchable, Hi/ 75 ohm (Lo)
Temperature: -10 °C to 40 °C, Humidity:10% to 90 %
AC 100 to 240 V 50/60 Hz
30 Watts
304 x 320 x 310 mm
7.5 kg
VM- 12P
System :
Picture tube :
Resolution :
Scanning frewuency :
Input terminals :
VIDEO A
VIDEO B
Outout terminals :
VIDEO A
VIDEO B
Sub Adjusting control :
Termination switch :
Operating environment :
Power source :
Power consumption :
Dimension (W x H x D ) :
Weight :

– 4 –
WD
H
Fig. 1

(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(2)
(2)
METALTOPCOVER
Fig. 2
DISASSEMBLY

– 5 –
1. OPERATING INSTRUCTIONS
1-1. FRONT PANEL CONTROLS
1. Monitor Selector Switch (VIDEO A/B)
Turn this onitor selector switch A position for a
signal fed through the rear panel VIDEO A
connectors.
Then, turn this onitor selector switch B posi-
tion for a signal fed through the rear panel
VIDEO B connectors.
2. Contrast Control ( CONTRAST)
Turn to adjust picture contrast according to your
requirement.
3. Brightness Control ( BIRGHT)
Turn to adjust picture brightness according to
your requirement.
4. Power Indicator
Lights when the power is on.
Lit: When the power is on.
Unlit: When the power is off.
5. Power Switch (POWER)
Press this switch to turn the power on or off.
1-2. REAR PANEL CONTROLS & CONNECTION
1. AC input socket (AC INPUT)
Connect the AC power cord (supplied) securely
to this socket and to a wall outlet.
2. Video input terminals (VIDEO IN)
These terminals are used to input a video signal
source to this monitor.
Connect to the video output of a VCR or an-
other monitor (for loop through connection) or to
a video camera.
3. Video output terminals (VIDEO OUT)
These terminals are used to output a video
signal for this monitor.
Loop-through output of the video in BNC
connector, then connect to the video input of
another monitor or a VCR.
4. Termination Switch (HI/75 Ω (Lo))
Select the input impedance (HI/75 ohm).
When using only one monitor, turn the termina-
tion switch to the 75 ohm position. When using
more than one monitor, set all of the termination
switch to the monitors to the HI position.
However, the last monitor termination switch
should be the 75 ohm position for proper line
termination.
. Sub-brightness control (SUB-BRI)
Turn to adjust picture brightness.
7. Vertical Size control (V-SIZE)
Turn to adjust picture vertical size of the picture.
8. Vertical hold control (V-HOLD)
If the picture is scrolling up or down on the
screen, turn this control until there is a single
steady picture.
5
4
32
1
Fig. 3

– 6 –
Fig. 5
Fig. 4
Fig.
123
47
8
Single Connection
Monitor
Video recorder
Video camera
To Video B
INPUT terminal
(Video signal cable)
To Video A
INPUT terminal
(Video signal cable)
(Rear panel)
To Video input
terminal
To Video input
terminal
Monitor
Video recorder
Monitor Video recorder
To Video input terminal
Coaxial cable
Video camera

– 7 –
ADJUST ENT
ITE
TI ING
PATTERN SETTING VR
LOCATION ADJUST ENT PROCEDURE
VERTICAL
LINEARITY
ADJUST ENT
HORIZONTAL
HOLD AD-
JUST ENT
GEO ETRICE
DISTORTION
PATTERN
ADJUST ENT
VIDEO
CENTERING
ADJUST ENT
VIDEO TILT
ADJUST ENT
HORIZONTAL
WIDTH AD-
JUST ENT
VERTICAL
SIZE ADJUST-
ENT
VERTICAL
HOLD AD-
JUST ENT
NTERLACE
ADJUST ENT
RASTER
ADJUST ENT
FOCUS
ADJUST ENT
PATTERN GENERATOR
ODE CROSS-HATCHED
PATTERN
PATTERN GENERATOR
ODE CROSS-HATCHED
PATTERN
PATTERN GENERATOR
ODE CROSS-HATCHED
PATTERN
PATTERN GENERATOR
ODE ONOSCPE
PATTERN
PATTERN GENERATOR
ODE CROSS-HATCHED
PATTERN
PATTERN GENERATOR
ODE ONOSCPE
PATTERN
PATTERN GENERATOR
ODE ONOSCPE
PATTERN
PATTERN GENERATOR
ODE ONOSCPE
PATTERN
CA ERA SIGNAL
DISCONNECT VIDEO
SIGNAL AND
PATTERN GENERATOR
ODE FULL-WHITE
PATTERN
PATTERN GENERATOR
ODE ONOSCPE
PATTERN
Adjust VR303 to make equal distance
between top-center and bottom-center.
Turn off horizontal sync. (pin to ground)
Adjust VR401 to make pattern upright.
Adjust eigth magnets on the deflection
yoke make picture to the best condition.
The video is centered by roating the two
small at the rear of the yoke.
Loosen the screw on the rear of deflection
yoke, rotating the yoke to correct position
tighten the screw.
Adjust L402 to make picture width within
"2" position.
Adjust VR302 make height to "1.5"
position.
Adjust VR301 to make pattern stop rolling.
Adjust VR301 have gap of vertical scan
line distinguish clearly.
Adjust VR402 to the suitable brightness.
Adjust VR404 have control picture and 4
corners to be distinguished.
VR303
VR401
L402
VR302
VR301
VR301
VR402
VR404
2. SERVICE ADJUSTMENTS
1357 7531
1
3
5
1
3
5
5
3
1

5
3
1

Fig. 7
CONTRAST VR
AND BRIGHT
VR TO CENTER.
CONTRAST VR
AND BRIGHT
VR TO CENTER.
CONTRAST VR
AND BRIGHT
VR TO CENTER.
CONTRAST VR
AND BRIGHT
VR TO CENTER.
CONTRAST VR
AND BRIGHT
VR TO CENTER.
CONTRAST VR
AND BRIGHT
VR TO CENTER.
CONTRAST VR
AND BRIGHT
VR TO CENTER.
CONTRAST VR
AND BRIGHT
VR TO CENTER.
CONTRAST VR
AND BRIGHT
VR TO CENTER.
CONTRAST VR
AND BRIGHT
VR TO AX.
CONTRAST VR
AND BRIGHT
VR TO CENTER.

– 8 –
T901
VR401
H-HOLD
VR402
SUB-BRITE VR302
V-SIZE
VR404
FOCUS
T402
L402
Q403
E
C
B
VR301
V-LINE
VR406
BRIGHTNESS
SW901 LED1 VR201
CONTRAST

SW202
CHANNEL

AIN BOARD
VR BOARD
VR301
V-HOLD
Fig. 8
Fig. 9
MAIN BOARD
(Foil side)
VR BOARD
(Foil side)