VISTEK V1634A, Installation And Operation Manual

Page: 7 / 12

2 March, 2005 V1634OM.DOC Page 7 of 12
2.7 INTERNAL HARDWARE
2.7.1 MAIN BOARD
FRONT PANEL
REAR CONNECTOR
SUB-MODULE
PROM
DIL SWITCH
LK2
LK3
SW1
U8
FS1
The significant items on the main board are described here:
FS 1 Input power fuse, 3A.
SW 1 Internal configuration switches, S1 at the top. See section 0 for details.
Note that
U8 The PROM that contains the firmware for the programmable device. I the event
of upgrades in the field it is most likely that this is the device that will need to
be changed.
LK 2 Enables termination of the video reference:
UP
= Open
DOWN = Terminated
LK 3 Enables termination of the AES reference:
UP = 600R Balanced
DOWN = 75R Unbalanced
Sub-Module Fitted with either the Analogue O/P Module (130-2190) or the digital O/P
module (130-2202). Check for correct orientation before powering the unit.
2.7.2 ANALOGUE O/P MODULE
SW1
R1
R2
R3
R4
SW2