Zenith 2 GENERAL INFO Diagram
SECTION 1
OVERVIEW
The GA series chassis was developed for Sentry 2, screen
sizes 19" through 27" stereo and mono models. The chassis is a single sided printed circuit board. One board is
used for the 19" and 20" connected sets. A second board
is used on the 25" and 27" isolated sets. During the
manufacturing process, the EAROM is programmed for
any added features. Output jacks will be added to the
board to accommodate the different features: Video/
Audio In, Non MTS Stereo, and MTS Stereo.
The GA series chassis features three IC’s for all signal,
sync and sweep processing. ICX2200 handles all of the
audio/video, sync and sweep drive processing. IC6000
is the microprocessor and IC6001 is the EAROM memory.
The keyboard and IR detector are tied directly to IC6000.
IC2100/2101 handles the vertical sweep.
At turn on, voltages for the vertical and video output
circuit are derived from the sweep circuit.
The GA chassis is comprised of three (3) categories. GA1, GA-2, and GA-3. Each category represents the screen
size and different model feature levels.
The GA-1 chassis had five module variations which are as
follows:
9-1869 (19/20V, Mono) Main Module w/o Jack Assy.
9-1870 (19/20V, Non MTS Stereo) Main Module w/o Jack
Assy.
OVERVIEW
MODEL INFORMATION
A-18577.
9-1950 (19/20V, Mono) Main Module w/2 Jack Assy, A-
18577-01.
The GA-2 chassis has three module variations which are
as follows:
9-1789 (25V, Mono) Main Module w/o Jack Assy.
9-1790 (25V, Stereo) Main Module w/3 Jack Assy, A-
18577.
9-1791 (27V, Non MTS Stereo) Main Module w/3 Jack
Assy, A-18577.
9-1831 (25V Stereo) Main Module w/3 Jack Assy. A-
18577.
9-1831 (25V, Stereo) Main Module w/3 Jack Assy, A-
18577.
The GA-3 chassis also has three module variations which
are as follows:
9-1996 (25V, MTS Stereo) Main Module w/5 Jack Assy,
A-18785.
9-1997 (27V, MTS Stereo) Main Module w/5 Jack Assy.
A-18785.
9-1998 (27V, MTS Stereo) Main Module w/5 Jack Assy.
A-18785.
9-1871 (19/20V, MTS Stereo) Main Module w/3 Jack Assy,
CM150 1-1 GA - GENERAL
SC3492A MODEL REMOTE CONTROL
6
POWER
Press to turn
TV ON or OFF
Press to access
closed captions.
Press (and repeat) to
activate the sleep timer
Press left to reduce
or right to increase
volume level of TV.
NUMBERED BUTTONS
Press repeatedly to
select desired menu.
CC
TIMER
VOLUME
MUTE
Press to turn off sound while
picture remains. Press again
C
C
to restore sound.
FLSHBK
Press to return to last TV
channel you were watching.
CHANNEL Up/Down
Press to select a TV channel by
going up/down through channels
programmed in the TV memory.
ENTER
Press to view Channel/Time
or to remove any on-screen
or
display in TV mode. Press to view
Display
menu
the Music menu (acti ve station)
listing in FM mode.
ADJUST (Left/Right)
Press during on-screen
menu operations to
adjust an option.
SELECT
Press during on-screen menu
operations to select an option.
SC3492A
124-00213-1
CM150 1-2 GA - REMOTES
MBR3447 MODEL REMOTE CONTROL
FLASHBK ( Flashback)
Returns to previous Channel.
SURF
Turns Surf Channel On/Off
POWER
Turns TV On or Off.
MODE
Selects the remote’s mode of operation
MUTE
Turns soun d O ff an d On
whil e pi cture re m ai ns.
CHANNEL (Up/Do wn)
Selects ne xt ch annel in
TV’s memory. Press
and hold to r epe at .
NUMBER PAD
Selects ch annels direc tly.
MENU
Display s m enus for TV
and other opt ions.
LEFT/RIGHT ARROWS
Chooses and show s th e
desired menu option.
A, B, C Ke ys
Special features of some TV’s
TIMER
Displays the Sleep Timer menu.
Press repeatedly to set desired
TV shut-off time.
VOLUME (Left/Right)
Increases TV’s sound level.
ENTER
Shows Channel/Time, enters
channe l , or r em oves any
on-screen menus.
QUIT/ (Three Functions Key)
Exits from on-screen display, turns
the sound enhancement feature on
or off, and swi tches audio be t w ee n
Main source and PIP source.
UP and DOWN ARROWS
Moves hi ghlighted ba r wit hi n
menu to select an option.
CC
Display s cl o sed caption m enu.
TV/VCR SOURCE
Steps through source options.
MBR3447
124-00212-35
CM150 1-3 GA - REMOTES
Loading...