Removing The Lens Assembly; Removing The Pan/Tilt Assembly; Dip Switches - JVC TK-C675BU Service Manual

1.4.6 Removing the lens assembly

(1) Remove the CCD board as described in 1.3.
(2) Remove the PR board as described in 1.4.1. Now the lens
assembly can be removed.

1.4.7 Removing the pan/tilt assembly

(1) Remove the MD board as described in 1.4.3.
(2) Remove the CN board as described in 1.4.4
(3) Remove the power supply unit as described in 1.4.5. Now
the pan/tilt assembly can be removed.

1.5 DIP SWITCHES

See Table 1-1 for the description of DIP switches on the PC
boards.
Values inside indicate the factory-set values.
Board Symbol No.
IF S1 Switches the camera (PR board) control.
JIG : Camera is controlled from the
IF
S2 Switches enable/disable the pan/tilt opera-
tion.
INIT : The pan/tilt assembly is initial-
OFF : The pan/tilt assembly is not ini-
S3-1 Switches the maximum rotation speed in
the manual pan/tilt operation.
ON : PAN 240 degree/sec.
OFF : PAN 80 degree/sec.
S3-2 Switches the CPU operation mode accord-
ing to the TV system.
OFF : NTSC
ON : PAL
S3-3 Switches the protocol.
OFF : Sets S1-4 and S1-5 of the MD
ON : Uses the JVC-CAM protocol.
S3-4 Not used.
S3-5 All switches should be set to OFF .
S3-6
S3-7
S3-8
Function
jig connected to CN5 on the IF
board.
: Camera is controlled from the
CPU of the IF board.
ized at power ON and the pan/
tilt operation from the control-
ler is enabled.
tialized at power ON and the
pan/tilt operation from the con-
troller is disabled. (This setting
is used during adjustments.)
TILT 120 degree/sec.
TILT 60 degree/sec.
board.
Board Symbol No.
MD S1-1
S1-2
S1-3
S1-4
S1-5
S1-6
S2
S3
CN S1
Note:
The settings of other DIP switches than S1 on the CN
board and S1-6 on the MD board are read at the time
the power is turned ON. Therefore, when changing the
position of these DIP switches, it is necessary to turn
the power OFF then ON again.
Table 1-1
Function
Not used.
All switches should be set to OFF .
Switches whether "MANUAL" is dis-
played during manual pan/tilt operation.
ON : Not displayed.
OFF : Displayed.
Switches the communication line connec-
tion mode. (This also results in switching
the communication protocol.)
ON : Bus connection (multi-drop).
OFF : Star connection (1-to-1 connec
tion).
Switches the communication directions.
ON : Simplex (1-way).
OFF : Duplex (2-way/4-wire).
Switches the internal sync and external
sync (power line lock).
ON : External sync (line lock) mode.
OFF : Internal sync mode.
When the camera is used in a RS-485
multi-drop connection system, set the
camera ID.
S2 : Sets the figure of 10.
S3 : Sets the figure of 1.
(Example: When S2 = 3 and S1
= 5, "35" is set.)
When it is used in a RS-422 system, these
switches should be set as
follows.
S2 : 0
S3 : 0
Sets the termination of the lines con-
nected to RX+ and RX- on the bottom
panel.
ON : 110 ohm termination across
RX+ and RX-.
OFF : No termination.
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