Panasonic WV-BM90 Service Manual

Service

ORDER NO.AVS8903175C8

Manual

Video Monitor

WV-BM90:’

SPECIFICATIONS

. . . . . . . . . . . . . . . . . . . . .

_ .

. . . . . . .

MAJOR OPERATING CONTROLS AND

THEIRFUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CONECTION

. . . .

. . . . .

. . .

OPERATING PROCEDURE

. . . . . _. . . . . . . . . _. _. . . .

CIRCUIT DESCRIPTION

l.MainBoard

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.Control Board

_. _. . _. . . . . . _. _ _. _. . . .

ADJUSTMENT PROCEDURE

. . .

. . . . . .

. _. .

APPEARANCE OF IC,

TRANSISTER

AND DIODE

. . . . .

LOCATION OF TEST POINTS AND ADJUSTINGCONTROLS

__........_______._......_..

Panasonic

CONTENTS

2 4 5

7 11 14

CHIP COMPONENTS

. .

. . .

WIRINGDIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

BLOCK DIAGRAM

MAIN BOARD/SWITCH BOARDNOLUME BOARD

CONTROL BOARD/CONTROL SUB BOARD

CONDUCTOR VIEW

MAIN BOARD/SWITCH BOARDNOLUME BOARD CONTROL BOARD/CONTROL SUB BOARD

. . . . .

SCHEMATIC DIAGRAM

MAIN BOARD/SWITCH BOARDNOLUME BOARD CONTROL BOARD/CONTROL SUB BOARD

. . . .

EXPLODED VIEW OF

WV-BM90

. . . .

. . .

REPLACEMENT PARTS LIST

_. . . . . _. . _. _. . .

16 18

26 24

25 21 27 28

Matsushita Electric Industrial Co., Ltd,.

-I,-

Central P.O. Box 288, Osaka 530-91, Japan

This symbol warns the user that uninsulated voltage within the unit may have

suificient

magnitude to

cause electric shock. Therefore, it is dangerous to make any kind of contact with any inside part of

-CAUTIONTO “EDUCE

TUE RI% CIF ELEC

TRIG SHOCK DO

NOT

AEMO’JE

- to”En ,OR BACK

USER

SERVICEABLE PARTS

INSlDE

This symbol alerts the user that important literature

FIEFEEI SEAVICING TO CIVALI

concerning the operation and maintenance of this

FIED SERVICL

PERSONNEL

unit has been included. Therefore, it should be read carefully in order to avoid any problems.

IMPORTANT SAFETY NOTICE

There are special components

used in this equipment which are important for safety. These parts

are indicated by”

” mark on the schematic diagram and the replacement parts list. It is essential

that these critical

parts

should be replaced with manufacture’s specified parts to prevent shock,

fire, or other hazards.

Do not modify the original design without permission of

manUfaCtUre.

SPECIFICATIONS

Video Monitor

WV-BM90

Power Supply

24OV

50Hz

for

WV-BMSOIA

and WV-BMSO/B

Power Consumption

Camera Input

Video Input

Video Output

Power Supply for Camera

Camera Switching

Sequential Switching Interval

Resolution (Horizontal)

Sweep Linearity

External Control Connection Terminal

Camera Extension Input

Alarm Time

Dimensions

Weight

OPTIONAL ACCESSORIES

o Optional Accessory for

WV-BM90

o Camera Extension Unit

220V AC

50Hz

for WV-BMSO/C, WV-BMSOIG and

WV-BM90lF

Approx.65W

.OVp-p/75

ohms, composite x 4 (BNC)

l.OVp-p/75

ohms, composite x 1 (BNC)

l.OVp-p/75

ohms, composite x 1 (BNC) Regulated current multiplex method Manual/Auto (Sequence) With auto and manual bypass

Adjustable; 1 to 30 sec.

750 lines at center

Less than 7%

Less than 5% SPOT MONITOR CONTROL IN x 4 RECOVER IN x 1 ALARM CONTROL OUT x 2

REMOTE OUT x 4 RESET OUT x 1

10 pin connector Adjustable: 2 to 30 sec. 230

(W)

x 240 (H) x 270 (D) mm

4.2kg

WV-83

MAJOR OPERATING CONTROLS AND THEIR FUNCTIONS

VIDEO MONITOR

WV-BM90

1 Power Switch (POWER)

This is a push type switch which turns the monitor ON and OFF. Push once and the switch remains down

( a )

for turning on the monitor and cameras, Sequence and camera number indicator lamps light. Push again, the switch comes up

( 1 )

for turning off the

monitor and cameras, and the lamps go off.

2 Mode Selection Switch (MODE STANDBY/ON)

This selects the condition of the monitor as; ON:

The picture of the camera will appear on the monitor.

STANDBY:

The picture of the camera will not appear on the monitor

in the sequence mode, however the picture signal is

provided at Video Output Connector (IO). The picture of desired camera can be observed by selecting Camera Selection Switch (6).

3 Input

SelectionSwitch(lNPUTSELECTEXT/CAMERA)

This selects the condition of the monitor as; EXT:

VTR playback picture connected to Video Input Connector can be observed.

CAMERA:

Camera picture connected to Camera Input Connector can be observed.

4 Bright Control (BRIGHT)

Turn this control clockwise to increase the picture brightness.

Contrast Control (CONTRAST) Turn this control clockwise to increase the picture

contrast.

Time Adjustment (TIME ADJ,

MIN/MAX)

The sequential switching interval can be manually ad-

justed from 1 to 30 seconds by turning this knob.

Sequence Switch (SEQUENCE) This is a push-push type switch which selects the cameras

in sequential switching mode when the switch is pushed and its lamp lights. The switching interval can be adjusted by Time Adjustment (6) from 1 to 30 seconds.

Camera Selection Switches These are push-push type switches which select the de-

sired camera to observe picture and the lamp of the selected channel lights. When one of these switches is pushed on, the sequence switch goes off if the sequence

switch has been turned ON.

Bypass Selection Switches (BYPASS/AUTO)

These select the condition of the monitor as;

BY PASS:

The picture of the connected camera will be skipped.

AUTO:

The channel(s) with no camera connection will be automatically skipped.

-2-

Camera Input Connectors (CAMERA INPUT)

The BNC type connectors are used to accept the coaxial cables from the specified cameras. These connectors supply the DC power and vertical drive

pulse.to

the cameras, and receive the video signal from the cameras. Note:

l Be sure to connect only the specified cameras. l Connect the camera after making sure that the monitor

is off. If the camera is connected while the monitor is on, the camera will not be functioned by activating the protection circuit for

misconnection.

Video Output Connector (VIDEO OUT)

The BNC type connector is used to provide the video output signal of the camera for the

additional,monitor

or video tape recorder. The video output signal of the camera is provided at this

connector even if the Mode Selection Switch (2) is set to the STANDBY position,

Video‘lnput Connector (VIDEO IN) This is an video input connector from a

VTR

for observing the playback picture. When the

KfR

playback picture is to be shown on the video monitor, set the Input Selection Switch (3) to the EXT position and Mode Selection Switch (2) to the ON position.

Timing Output Connector (TIMING OUT) This output connector provides the timing pulse signals

for switching in the sequence operation for other system such as another Mini CCTV System or sequential switcher.

Power Cord

Timing Selection Switch (TIMING SELECT

INT/EXT)

The timing pulses for the sequential switching interval can be selected as; INT:

The timing pulses for the sequential switching interval are generated in the video monitor

WV-BMSO.

EXT:

The timing pulse for the sequential switching interval are synchronized with the external timing pulses fed to the External Timing Input Connector (16) from the time

lapse

VTR

or another Mini

CClV

System.

External Timing Input Connector (EXT IN)

This is an input connector for the external

timing

from the time lapse

VTR

or another Mini CCTV Syst

Camera Extension Input Connector

(CAMERA EXTENSION IN) This is a IO-pin connector for the Camera Extensi, WV-63 for expanding the system up to 7 cameras

informations are as;

Pin 1:

Video Input Signal

Pin 2:

VD Output Signal

Pin 3:

Ground

Pin 4:

Logic Signal for Sequence

Pin 5:

Logic Signal for Sequence

Pin 6:

Logic Signal for Sequence

Pin 7:

Logic Signal for Sequence

Pin 9:

Logic Signal for Sequence

IO:

Logic Signal for Sequence

Camera Extension Switch (CAMERA EXTENSION, ON/OFF) This selects the condition of camera extension

as;

ON:

Camera pictures connected to the Camera Extl Unit WV-63 can be observed on the monitor.

OFF:

Select this position whenever the Camera

Exh

Unit WV-63 is not connected. Vertical Hold Control (V.HOLD) Locks in the picture of the monitor vertically.

Auto Reset Switch (AUTO RESET, ON/OFF) This selects the condition of auto reset function as, ON:

The automatic reset function performs and the

matic

reset time is set to approx. 60 seconds

OFF:

The automatic reset function is disabled.

Alarm Time Adjustment (ALARM TIME ADJ) The alarm time can be manually adjustable by turnir

control. The alarm time can be set from 2 to 30 seconds (1 se step).

. --_

_..I_

-3-

22 External Control Connection Terminal

(SPOT MONITOR CONTROL IN/RECOVER IN/ALARM CONTROL OUT/REMOTE OUT)

SPOT MONITOR CONTROL IN The terminals of the Spot Monitor Control In are used

to connect the intercom or alarm sensors for the spot monitoring by making a short circuit of terminal 1,2, 3 or 4. When the Camera Extension Unit is used, the spot monitoring is proceeded for terminal 5, 6 and 7 of the camera extension unit.

If the terminal 1 is shorted by intercom or alarm sensors,

the camera No.1 is selected and its picture is observed on the monitor. The picture of the camera

No.2,

3 or 4 (5, 6 or 7 when the Camera Extension Unit is used.) can be observed in the same manner. Note:

The voltage of short circuit for the terminal should be 0 -

0.2 volt when the intercom or alarm sensor is activated.

l RECOVER IN

To reset the spot monitor picture of the desired camera and back to the sequence operation, supply the reset signal from the time lapse

VTR

to this terminal.

l ALARM CONTROL OUT

The terminals of the Alarm Control Out are used to connect the buzzer or chime for sounding when the terminals of the Spot Monitor Control In is (are) shorted by intercom or alarm sensor.

ALL MODE-GND Connection The connected buzzer or chime will sound at both

positions of the Mode Selection Switch (2) when the

intercom or alarm is activated.

STANDBY-GND Connection The connected buzzer or chime will sound when the

Mode Selection Switch (2) is positioned at STANDBY and the intercom or alarm is activated,

l REMOTE OUT Connection

The terminals for the Remote Out are used to connect the Spot Monitor Control In on another monitor for the Spot Monitoring by short circuit of terminal

1,2,3

or 4 when the

two video monitors are connected,

The RESET out terminal is used to connect the RECOVER

input terminal on another monitor. The terminals for the Remote Out are also used to connect the Remote In terminals on the panning control by short circuit of terminal 1, 2, 3 or 4 when the video monitor

is connected with Remote Control Unit for Auto Panning

Head.

The power rate of the alarm should be up to DC

24V,

max.

OOmA.

If the power capacity of the remote is less than 1

OOmA

24V,

the remote load can be connected at the terminal of Remote directly. If the power capacity of the alarm is more than 1

OOmA

24V,

the relay circuit should be used for the remote

load.

- .

CONNECTIONS

Cautions:

Keep the Power Switch of the monitor, optional Camera

Extensron

Unit and optional Remote Control

Unrt

in the

OFF position during

connectlon.

If the power of these units are ON during connection, the camera will not function due to the protection circuit for

misconnection.

Connect only the specified cameras WV-BL90 or WV-71, If other type of camera is connected, the Mini camera system will not perform due to the protection circuit for wrong camera.

-4-

OPERATING PROCEDURE

SELECTION OF CAMERA

Note:

Set the Power Switch (POWER) on the front panel to the ON position by pushing once. The switch remains down

( A )

keeping the monitor and camera ON, and green lamps for sequence and channel(s) which the Camera(s) is/are connected light ON approx. 4 seconds for you to confirm how many cameras are connected.

The sequential switching features the automatic by-

pass circuit by detecting the presence of the DC power

’

for the camera so that the input connector with no camera connection is automatically skipped.

Push the Camera Selection Switch for selecting the desired camera’s picture and green lamp lights. Note:

The desired camera’s picture can be seen on the monitor by pushing the Camera Selection Switch at the sequence mode.

2. also, the desired camera’s picture can be seen on the

monitor by pushing the Camera Selection Switch.

Caution:

STANDBY MODE - MONITORING PICTURE Set the Power Switch (POWER) on the front panel to the

ON position by pushing once.

When the power switch of monitor is turned ON and OFF repeatedly in the short period of time, the camera may not be turned ON due to the operation of

miscon-

nection

protection circuit. In this case, leave the switch in the OFF position for a few seconds before turning it ON again.

The switch remains down

( a )

keeping the monitor and camera ON, and green lamps for sequence and channel(s) which the Camera(s) is/are connected light ON approx. 4 seconds for you to confirm how many cameras are connected.

SEQUENCE MODE (More than two cameras) Set the Power Switch (POWER) on the front panel to the

ON position by pushing once. The switch remains down

( II )

keeping the monitor and camera ON, and green lamps for sequence and channel(s) which the Camera(s) is/are connected light ON approx. 4 seconds for you to confirm how many cameras are connected.

Set the Mode Selection Switch (MODE) to the ON position. Push the Sequence Switch (SEQUENCE) to be sequential

switching and green lamp lights. Adjust the Time Adjustment (TIME ADJ) to be desired sequential switching interval (from 1 to 30 seconds).

Set the Mode Selection Switch (MODE) to the ON position.

Push the Sequence Switch (SEQUENCE) to be sequential switching. Adjust the Time Adjustment (TIME ADJ) to be desired sequential switching interval (from 1 to 30 seconds). Set the Mode Selection Switch (MODE) to the STANDBY position. The picture on the monitor will disappear, however the sequential switching is actually being carried and the picture can be observed on the additional monitor connected to the Video Output Connector.

When the picture of the desired camera is ob-

served/monitored, push the button of Camera Selection

Switch for the desired camera and green lamp lights. By pushing the Sequence Switch (SEQUENCE) again, the picture on the monitor will disappear and back to the sequential switching in the STANDBY mode.

PV”Ver

Mode

Input

Bright

contrast

Time

sequence

Camera Selection

Swtch

Select&

Selection

Control

Adjustment Switch

Switches

Switch

Bypass Selection

Swtches

Green

Lamp

“-_

*. *_

-5-

. .

Alarm Senssrs Signal

PRIORITY OF SPOT MONITOR CONTROL IN

The selection of the camera by Spot Monitor Control In is set as first come, first served. The Camera Selection Switch has a first priority against any selectional signal.

Time Lapse VTR

When the Time Lapse VTR is connected with Mini CCN System, the selection of the camera by alarm

sen-

sors/intercom

is automatically reset after reset time set by the Time Lapse VTR and the selection of the camera is returned to the sequential switching.

VTR

PLAYBACK MODE

Set the Power Switch (POWER) on the front panel to the ON position by pushing once. The

switch

remains down

( a )

keeping the monitor and camera ON, and green lamps for sequence and channel(s) which the Camera(s) is/are connected light ON approx. 4 seconds for you to confirm how many cameras are connected. Set the Mode Selection Switch (MODE) to the ON position.

Set the Input Selection Switch (INPUT SELECT

EXT/CAMERA) to EXT position for observing the playback

picture.

AUTOMATIC RESET SELECTION SWITCH FOR SPOT MONITOR CONTROL INPUT

The monitor has the built-in automatic reset circuit which is automatically reset the spot monitor control input signals such as intercom, alarm sensors etc. at approx. 60 seconds after input signal is received. The automatic reset circuit is functioned according to the spot monitor control input signals as;

The selection of the camera by the alarm sensors signal is automatically reset after approx. 60 seconds and the selection of the camera is returned to the sequential switching.

Intercom Signal

(a) Intercom Communication

The selection of the camera by the intercom signal is being

held during intercom communication and will be reset for the sequential switching after the intercom communication has been over. (b) Intercom Calling

The selection of the camera by intercom calling signal

only is automatically reset after approx. 60 seconds and the selection of the camera is returned to the sequential switching.

-6-

CIRCUIT DESCRIPTION

1. Main Board

l-l Power

Circuit

This circuit generates the regulated + 5V DC, +

12V

DC and

+ 24V DC from 22OV/240 AC.

1-2 Video Amplifier Circuit

The composite video signal fed to base of 46 from control

board through pin 1 of CN3.

The

video

signal from the emitter of

IS fed through VR8

(CONTRAST), amplifier

Q7,Q8

and Q9 to cathode of CRT.

1-3 H.V Deflection Circuit

This circuit generates

vertical

(V)

deflectlon

sawthooth current for V scanning of the beam inside the cathode ray tube (CRT) and horizontal

(H)

deflection sawthooth current for horizontal scanning of the beam inside the cathode ray tube.

1-4 High Voltage Circuit

This

circuit generates high voltages for cathode ray tube (CRT) electrodes. The flyback pulse generated by

horizontal

(H) deflection

circuit is supplied to the primary winding of the

flyback

transformer

(FBT)

in high voltage pack T3 to step up the

flyback

pulse to the necessary level. The boosted pulses

obtained at the secondary winding of the transformer are

rectified to generate high voltages.

2. Control Board

2-1 Camera Power Circuit

The video monitor

WV-EM90

has four camera power circuit which supply the DC power to the specified cameras through the coaxial cable respectively. Since these four circuits are exactly same, the power supply circuit for camera-l will be described. This circuit consists of a constant current circuit, and a

misconnectlon protection circuit.

Constant Current Circuit In order to compensate the difference of voltage drop due to the coaxial cable length between the video monitor and camera, this circuit applies the constant current to the camera

regardlessof coaxial cable length.

+ 24V DC supplied from Main board through at pin 8 of El is

divided by zener diode

D2,

VRl (DC CURRENT ADJ) and R3

R5.

The divided DC voltage is supplied through operation

amplifier

ICl

(a) to base of impedance converter 471 for controlling the camera DC power to steady state. The variation of load current due to coaxial cable length is detected by R6 and R7 as a voltage change and the changed

1,.

voltage is supplied to operation amplifier

ICl

(a) which compensates the voltage differences between pins 2 and 3 of

ICl. Therefore, even if the cable length is changed, current

fed to detecting resistors R6 and R7 is kept constant and the constant current is supplied to the camera.

l Misconnection Protection Circuit

The video signal from the camera is multiplexed on the power line, the rnisconnection protection circuit protects the power circuit from a open or short circuit. When the power switch on the video monitor is turned ON,

is turned ON at beginning and low potential at collector

of Ql issupplied to pin 2 of operation amplifier

ICl

(a).

At this

time,

approx. +

22V

DC set from + 24V DC by dividing

with

D2, VRl

and R3 -R5

and supphed to pin 3 of

ICI

(a) is compared with the potential at pin 2 so that the output at pin 1 of

ICl

supplied to base of impedance converter 471 is

high level and

Q71

is kept OFF.

At the same time, 43 is turned ON momentarily and approx.

+4V

DC set by

zenner

diode Dl is supplied through

Q3,

and Dl to the camera. In the camera, approx.

40KHz

pulse is

generated by the

+4V

DC and multiplexed on the power line. This pulse is supplied to Q2 for turning it ON and Q? OFF. Due to Ql OFF, collector potential is increased and thus the output of

ICl

(a) is decreased therefore, the impedance converter 471 is turned ON and converts the impedance of power line from high to low. As a result, the DC power is supplied from the constant current circuit continuously through

471.

While camera power circuit supplies constant current to the camera, voltage difference appears at both end of R6 and R7 so that the Ql is turned ON and

Ql(CONTROL

SUB BOARD) is kept OFF. If this video monitor is connected to other CCTV cameras or products, no pulse is fed back to the starter circuit and

(CONTROL SUB BOARD) is kept ON. Therefore, no DC power is supplied to the connected products in order to protect them. When the coaxial cable is disconnected in the operating condition, no current is fed through R6 and R7, voltage drop of R6 and R7 reduces and Ql is turned OFF. As a result, Ql on the Control sub board is turned ON and potential at pin 2 of

ICl

(a) decreases, pin 1 of

ICl

(a) is increased and

471 is

turned OFF. In this way, the no DC power is supplied to the power line.

2-2 Video Processing Circuit

2-2-l Camera Detection Circuit

This circuit detects whether camera is connected or not. This monitor has four camera detection circuits and these four circuits are exactly same, so that the camera detection

crrcurt

for camera-l will be described. When the camera WV-BL90 is connected to camera-l IN connector CNlOl and power switch of the vrdeo monitor is turned ON, approx. +

12V

DC is supplied from the camera

power circuit to the connected camera. At this time, +

12V

DC is also supplied to 44 for turning It OFF and Q5 OFF. The H level at collector of Q5 is supplied to pin 7 of

IC6

and

lC6

recognizes that camera-l is connected. When camera is not connected to the video monitor or the

coaxial cable is disconnected in the operating condition, no

DC power is supplied to power line since

misconnection

protection circuit functions. At this trme, both Q4 and Q5 are turned ON, pin 7 of

lC6

becomes L level and

IC6

recognizes

that camera-l is not connected.

2-2-2 Camera Selection Circuit

This circuit selects the camera signal which is supplied to signal processing circuit for observing the selected prcture on the monitor. Four camera selection

circutts

are existed on the monitor and are exactly same, so that the camera-l will be described. When camera-l is selected by sequence mode or spot monitoring mode, pin 2 of

IC6

becomes L level and the L level is fed to Q6 to turn ON Q6. Therefore the camera-l signal obtained at Pin 3 of 46 is supplied to signal processing circuit.

2-2-3 Signal Processing Circuit

The video signal from the camera-l supplied to Q6 on the control board is mixed with the VD pulse which is sent through VD pulse generator

Q12/Q13

and inverter 45 and supplied to the camera for vertical synchronization. The vrdeo

srgnal

with VD pulse is supplied through 96 to

clamp circuit

Q20.

In the clamp circuit, horizontal (H) and vertical

(V)

blanking periods of video signal is clamped by the clamp pulse which is generated by sync separator

Q19

and clamp pulse generator

consisting of

ICl

(a) -

(d).

The video signal is sent to VD erase circuit

Q21

where the

Vsync is added and VD pulse is removed by the VDE pulse.

This signal is supplied to slicer consisting of Q22 -

424

where

low level of sync signal is clipped and the sync level is set to

0.3vp-p.

The video

INT/EXT

switching circurt consisting of

426 -

Q29 selects either composite video signal entering VIDEO INPUT connector or camera video signal swrtched by microprocessor

IC6. When the input selection switch

5~3

on the VR board is

set to CAMERA

posltlon,

pin 53 of IC6 sends

low

level to

427

and Q29 for turning ON

427

and turning OFF

Q2R.

Therefore camera video signal is selected and supplied to Main board. When SW3 is set to EXT position, high level is

1..

sent to

427

and Q28 and composite video signal externally enters to the video monitor is supplied to Main board. The video output circuit consisting of

430 -

431 amplifies

the camera video signal for setting it to specified signal level

and compensates the frequency response. This signal is supplied to VIDEO OUTPUT connector.

2-3 Remote Control Circuit

This circuit supplies the camera selection signal and reset signal to the remote control unit WV-32 for auto panning head or another video monitor for remote control. This circuit also

supplres

the alarm signal to the additionally

connected buzzer or chime.

Camera Remote Output Circuit When the camera-l is selected by sequence control for example, pin 2 of microprocessor

IC6

becomes low

(L)

level

during the sequence time set by

VR9

(TIME

ADJ)

on the

Volume board.

This

signal IS supplied through C64 and RI 16

454

and both

454

and

455

are turned ON at the decay

timing of signal and negative trigger obtained at collector

455

is supplied to connected unit. On the other hand, when the camera-l is selected by spot monitor control for example, pin 2 of

IC6

becomes L level during camera-l button is depressed and the L level is supplied to Q54 for turning both

454

and

455

ON and

negative trigger obtained at collector

Q55

is also supplied to connected unit for selecting camera-l. The remote output circuit for the camera-2, camera-3 and camera-4 functions as same manner as camera-l remote output circuit.

l Remote Reset Output Circuit

When sequence button is depressed while the video

monrtor

is operated at spot monitor mode, pin 22 of IC6 becomes L level during the button is depressed. This signal is

supplred

462

for turning both Q62 and Q63 ON and the negative

signal/pulse obtained at collector

463

is supplied to

connected products through reset terminal.

l Alarm Standby Output Circuit

While the

video

monitor is operated at standby mode and

spot monitor control signal IS fed to the spot monitor control

terminal, pin 54 of

IC6

becomes L level. This is sent to

Q51

turn both 451 and

QSO

ON and the negative

signal/pulse

obtained at collector

Q50

is supplied through standby alarm

, a-_

output

teimin’al

to connected buzzer or chime to ring it.

. .

At this time, correspond camera signal is selected and observed on the monitor screen.

-a-

2-4 External Spot Control Circuit

The external spot control circuit contains camera1 -4 select circuits, busy control circuit and reset control circuit.

Camera Select Circuit

When the spot monitor control 1 terminal is grounded for

example,

435

is changed from ON to OFF and H level at the

collector is supplied to pin 44 of

IC6

for selecting the camera- 1 signal and the picture of camera-l can be seen on the video monitor. The camera-2, camera-3 and camera-4 select function same as camera-l select.

Busy Control

Circuit

(In case Intercom system is used with this system)

When the two-wire intercom system is used with this system, the wires connected between a master unit and branch unit are also connected to the spot monitor control input 1 - 4 and the ground terminal respectively. In this system if the call

button on the branch unit for spot monitor control input 1 is

depressed, the potential at the base of

435

becomes L level

for turning

435

OFF. As a result, H level at collector is

supplied to pin 44 of

IC6

and the picture of camera-l can be

seen on the video

monrtor.

At the same time, automatic reset circuit in microprocessor IC6 starts functioning, determines the automatic reset time at 60 seconds and reset to the sequence mode to spot monitor control. However, the spot monitoring mode set by pressing the call button on the branch unit of intercom system should not be reset to the sequence mode during conversation. During the conversation, the call button is released and approx. + 6V DC (it should be less the +

12V

DC) is fed through D16 to

Q34

for

turning

434

ON.

Therefore the pin 39 of

IC6

is kept L level and the sequential

circurt

IC6

is not reset automatically during the conversation using intercom system. If the phone is put down after finishing the conversation, the potential fed to

434

becomes approx. 0.3V DC and Q34 is

turned OFF. As a result, H potential is fed to pin 39 of

lC6

and

the sequential circuit in

IC6

is reset to the sequence mode.

(In caseTime lapse VTR is used with this system)

The time lapse VTR is used with this system, alarm control output terminal and recover input terminal are connected to

the VTR. When the alarm signal is fed to the VTR, it starts

recording. At this time, H potential is provided at recover

terminal from the VTR and the H level is turns both Q32 and

434

ON. As a result, L level at collector of

434

is supplied to

pin 39 of

IC6

for inhibiting the automatic reset circuit in KS to keep the video monitor on the spot monitoring mode while the VTR is in recording mode.

a Reset Control Circuit

When the recover terminal is grounded externally,

433

turned ON and key matrix for sequence control of

IC6

achieved and the system is changed from spot monitoring

mode to sequence mode.

2-5 LED Drive Circuit

When this monitor is operated in the sequence mode, pin 6 of

IC6 becomes L level. It is supplied to

449

for turning it ON

and H level at collector of

449

is supplied to sequence

indicating LED 1 on the Switch board to light the LED. At this

time, pins

2,3,4

and 5 of IC6 becomes L level sequentially and

supplied to respective swrtching transistors

445, 446, Q47

and

448

to turn them ON and the camera1 - 4 (LED 2 - 5) on the Switch board is lit. When this monitor operates at the spot monitoring mode,

pin 6 of IC6 becomes H level and sequence LED is turned OFF. Since one of pins 41- 44 of

IC6

become L level, one of pins

5 of IC6 is L level, respective LED drive transistors (445 -

448)

is turned ON, and LED of selected camera is lit.

2-6 System Control Circuit

All function of this monitor such as camera select, mode

select are controlled by the microprocessor

1C6.

When the power switch of video monitor is turned ON, + 5V

DC is supplied to pin 33 of

IC6.

At the beginning, generated

+ 5V DC is fed to pin 1 of reset pulse generator

IC7

and reset

pulse obtained at pin 3 of IC7 is fed to pin 17 of IC6 for setting

the IC6 to initial condition.

The pin identification and functions of the microprocessor IC6 is described in the table.

. --_

-9-

MN1

554CCLl

Pin Identification

Pin No.

Name

vss

PO0

PO1

PO2

PO3

6 PC2

PlO

Pll

9 P12

P13

SYNC 12 SIRQ 13

IRQ

SBT 15

SBO 16

SBI

RST 18 P20 19

P21

P22

P23 22

P30

P31

P32 25 P33 26

P40

P41

P42 29

P43 30

P50

31 P51 32 P52 33

vDD

PC0 35

PC1 36

P53 37

P60

P61 39

P62 40

P63 41

P70

P71 43

P72 44

P73 45

P80

P81 47

P82

P83

P90

P91

P92 52

P93 53

PA0

PA1 55 PA2 56

PA3 57

PBO 58

PBl

PB2

PB3 61

osc2

62 OSCl 63

XI 64

IN/OUT

IN/OUT IN/OUT IN/OUT OUT IN/OUT IN/OUT IN/OUT IN/OUT

IN IN

IN IN/OUT

IN/OUT IN/OUT IN/OUT IN/OUT IN/OUT OUT OUT OUT OUT OUT OUT OUT IN OUT

OUT

OUT IN IN IN IN IN IN IN IN IN/OUT

IN/OUT

IN/OUT IN/OUT IN/OUT IN/OUT IN/OUT IN/OUT OUT OUT

OUT

OUT IN IN

Description

Ground Camera-l Select/LED/Remote Control

Camera-2 Select/LED/Remote Control Camera-3 Select/LED/Remote Control Camera-4 Select/LED/Remote Control Sequence LED Output Camera-l Power Select/Detection Camera-2 Power Select/Detection Camera-3 Power Select/Detection Camera-4 Power Select/Detection

Not Used Reset Signal Input

V. Sync Input

Not Used Not Used Not Used

Rest In Adapter Voltage Detection Not used

Not used

Discharge pulse

Remote control recover

Extension Select 1 Timing Standby

Key scan output-l Alarm Time

D/A

output

Key scan output-2 Alarm Time D/A output Key scan output-3 Alarm Time D/A output Key scan output-4 Alarm Time D/A output Auto V sync output VD output VDD Rest output output Clock output

Ring Counter output Ring Counter input-2 Ring Counter input-l Busy control Recover Input Camera-4

InterphoneISensor

Input Camera-3 Interphone / Sensor Input Camera-2 Interphone /Sensor Input Camera-l Interphone /Sensor Input Sequence time Alarm time control External Timing Pulse Input

EIAICCIR

select Key scan -1 Key scan -3 Key scan-2

IN/EXT

Video Select Output Alarm standby output Alarm all mode output Not used Not used Not used Not used Not used Clock Pulse Generator Clock Pulse Generator . Ground Not Used

. --_

. .

ADJUSTMENT PROCEDURE

1 TEST EQUIPMENT REQUIRED

The following equipment is required for adjustment of WV-

BM90.

Oscilloscope

Digital Voltmeter

Completely aligned Black and Whrte Camera

WV-EL90

Frequency Counter

Resolution Chart

(YWV1400RB99)

NATIONAL

FhIEMMIiC

RESOLUTION CHART

Fig.

l-1

3 CRT REPLACEMENT

Remove the cover as previously described in section 2.

Remove two screws holding the front chassis and slide back the chassis

wrth

PCB unit.

Disconnect the anode cap.

Caution

Make sure that the anode voltage is completely discharged by directly connected between anode terminal and chassis.

RemovG+two

screws

Fig.3-1

Remove two screws holding the Control board assembly and open the direction of the arrow.

2 DISASSEMBLY PROCEDURE FOR

ADJUSTMENT

Remove six screws holding the cover and remove the cover by pulling it backward.

Remove six screws

Fig. 3-2

Disconnect the CRT socket by pulling it backward.

Loosen the screw holding deflection yoke and convergence magnets assy and remove the yoke and magnets assembly by pulling them backward.

Fig. 2-1

Deflection holding screw

CRT Sock

.et

Fig. 3-3

Remove four screws holding CRT and remove CRT.

Remove four screws

Fig. 3-4

(1)

. .

(2)

4 CONNECTION AND SETTING UP FOR

ADJUSTMENT

Connect the coaxial cable between the VIDEO OUTPUT

terminal of

BNV

Camera

WV-BL90

and CAMERA INPUT

connector

1,2,3

or 4 of Video Monitor

WV-BM90.

(3)

Video Monitor

WV-EM90

000000

Approx.

1.7ft

(0.5m)

ADJUSTMENT

12V

adjustment

Test

Point

TP2 (12V)

Adjust

VRl

(12V

ADJ)

Main board

Disconnect all cameras from the Camera input connectors

1,2,3

and 4 on the rear panel. Turn ON the power switch. Connect the digital voltmeter to

TP2.

Adjust

VRl (12V

ADJ) for

12V 2

O.lV.

DC current adjustment

Adjust

VRl (DC CURRENT)

Observe

DC current meter

Control board

Connect the DC current meter between the video camera

WV-BL90

and CAMERA INPUT 1 connector of Video

Monitor

WV-BM90.

Turn ON the power switch. Adjust

VRl

(DC CURRENTADJ) for

22OmA t

7mA. Confirm that the DC current of CAMERA INPUT connectors

2,3

and 4.

hold,

V hold coarse adjustment

Adjusts :VR2 (SUB BRIGHT)

Main board

VR5 (H. HOLD)

Main board

VRll

(V. HOLD)

Control board

Set the controls and switches on the volume board and Control board as follows.

Mode Selection switch

Input Selection switch

Contrast Control

Bright Control

Vertical hold control

Horizontal hold control

ON position EXT position Mechanical Center position Mechanical Center position Mechanical Center position Mechanical Center position

Connect the completely aligned video camera

WV-BL90

to CAMERA INPUT connector

1.2.3

or 4 of Video Monitor

WV-BM90.

Aim the camera

atthe

resolution chart

(YWV1400RB99).

Turn ON the power switch. Adjust the

VR2

(SUB BRIGHT) so that the raster will just appear. Adjust VRl l(V.HOLD) and

VR5(H.HOLD)

so that the circle

of the resolution chart on the Monitor screen becomes ‘.

center position.

(4) Picture tilt adjustment

(9) Focus fine adjustment

Adjust

Deflection coil

Adjust

VR6 (FOCUS)

Main board

Loosen the deflection coil holding screw.

Adjust VR6 (FOCUS) for best focus in the monitor.

Turn the deflection coil until the raster on the monitor

screen is straight.

Carefullytighten the deflection coil holding

screw.

(5) Centering adjustment

Adjust

Centering magnets

(H. WIDTH)

Main board

Adjust the centering magnets until the raster comes to the center of monitor screen becomes true circle.

Adjust L8 (H. WIDTH) so that the circle of the resolution chart on the Monitor screen.

(6)

Vertical height and linearity adjustment

Adjust

VR4 (V.LIN)

Main board

VR3

(V. HEIGHT)

Main board

Adjust VR3 (V. HEIGHT) and V. LIN VR4 so that the

circle

the chart is nearly a true circle.

(7) Sub-brightness adjustment

Adjust

VR2 (SUB BRIGHT)

Main board

Set the controls on the volume board as follows.

Contrast Control

Bright Control

Fully counter clockwise Mechanical Center position

Turn

VR2 (SU8

BRIGHT) fully clockwise and then turn it

back so that the raster will just go out.

Turn VR8 (CONTRAST) at mechanical center position.

(8)

H hold, V hold fine adjustment

Adjust

VRS (H.HOLD) VRll

(V. HOLD)

Main board Control board

Disconnect all cameras from the camera input connector

1,2,3

and 4.

Connect the frequency counter to pin 2 (Yellow wire) of deflection coil and adjust the

VR5

(H HOLD) on the Main

board for 158KHz f 50Hz.

Connect the frequency counter to Pin 3 (Red wire) of

deflection coil and adjust the

VRll(V

HOLD) on the

control board for

47.3Hz

2 0.5Hz.

. --_

. .

APPEARANCE OF IC, TRANSISTOR AND DIODE

NPC1379C

NJU74HCU04M AN6554NS

NJM2903M

MN1 554CCLl

AN6554NS LQV3M9280G

2SD973-QRS

2SD601 -QRS

2SD662-PQR

2SB709-QRS

2SD636-QRS

2SC2404CD

2SB641 -QRS

2SB710-QRS

UN2217 MA1 51 K MA1 53Tw

czm!

1 : NC

2 : Anode

Cathode

XN4501 XN4601 XN4401

RD6.2JB2 RD5.1JSB2

RD4.7JSB2

CTV- 12s

A K A

BV402

HllAVlA

NJM78L09A M51951ASL

AN78N05

2SA1018

2SC3451

MNCA

2SA772B

2SC1567-OR 2SC2258

YWTC4S69F

RD9.1

ESB3

EMOlZ EU02Z RD8.2ESB2T

YFRD33ESB4T

MA1 62TA

MA165

RUlP

EMOlZ EU02Z

BllCk

-4’

ERA22-06

RUlP

MA185

U06

. --_

. .

+ 40 hidden pages

Panasonic WV-BM90 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual