Toshiba 2837DD User manual

SERVICE DATA
FILE NO. 050-751
PAL-B/G SYSTEM
TOSHIBA
COLOUR TELEVISION
2837DD,
2537DD
7037DD
Note: The specifications of model 7037DD are the same as
those of model 2837DD which are described below.
SPECIFICATIONS
Input Power Rating:
Aerial Input Impedance:
Receiving Channels:
Intermediate Frequencies:
Picture Tube:
Sound Output:
Speakers:
Aux. Terminals:
Cabinet:
Dimensions:
Weight:
Features:
147 W (2837DD), 143 W (2537DD), AC 220 ~ 240 V, 50 Hz
75 ohm unbalanced type for VHF, UHF and CATV
CCIR (B/G.PAL) TV Broadcast Standard:
channels 2 to 4, 5 to 12, S1 to S41
channels 21 to 69
Picture I-F carrier frequency 38.9 MHz
Sound I-F carrier frequency ...
Colour sub-carrier frequency .. 34.47 MHz
28 inches, A66ECY 13X31, 660 mm (measured on diagonal of viewable picture area)(2837DD),
25 inches, AS9ECY 13X31, 590 mm (measured on diagonal of viewable picture area)(2537DD),
110° deflection
10.0 W x 2 (at 10% Distortion MAIN), 5.0 W x 2 (at 10% Distortion Dolby)
120 mm x 80 mm oval 2 pcs
21 pin socket (FULL), 21 pin socket (S-VIDEO/AUDIO) S-VIDEO, VIDEO/AUDIO INPUT socket
Table type
(2837DD) (2537DD)
516 mm
640 mm
447 mm
33 kg (2837DD), 27.5 kg (2537DD)
Video input of PAL-B/G, TELETEXT reception, OFF-timer, German stereo/bilingual,
Dolby surround
Specifications are subject to change without notice.
Printed in Japan Jul. 1994

SAFETY INSTRUCTIONS
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY
PRECAUTION" AND "PRODUCT SAFETY NOTICE" INSTRUCTIONS BELOW.
X-RAY RADIATION PRECAUTION
1. The E.H.T. must be checked every time the
receiver is serviced to ensure that the C.R.T. does
not emit X-ray radiation as result of excessive
E.H.T. voltage. The nominal E.H.T. for this receiver
is 26.5 kV at zero beam current (minimum
brightness) operating at 220V a.c. The maximum
E.H.T. voltage permissible in any operating
circumstances must not exceed 29.0 kV. When
checking the E.H.T., use the ‘High Voltage Check’
procedure in this manual using an accurate E.H.T.
voltmeter.
2. The only source of X-RAY radiation in this receiver
is the C.R.T. To prevent X-ray radiation, the
replacement C.R.T. must be identical to the original
fitted as specified in the Parts List.
. Some components used in this receiver have safety
related characteristics preventing the C.R.T. from
emitting X-ray radiation.
For continued safety, replacement component
should only be made after referring the Product
Safety Notice below.
SAFETY PRECAUTION
. This receiver has a nominal working E.H.T. voltage
of 24.5 kV. Extreme caution should be exercised
when working on the receiver with the back
removed.
Do not attempt to service this receiver if you are
not conversant with the precautions and procedures
for working on high voltage equipment.
When handling or working on the C.R.T., always
discharge the anode to the receiver chassis before
removing the anode cap
The C.R.T., if broken, will violently expel glass
fragments. Use shatter proof goggles and take
extreme care while handling.
Do not hold the C.R.T. by the neck as this is a very
dangerous practice.
. It is essential that to maintain the safety of the
customer all cable forms be replaced exactly as
supplied from factory.
3. A small part of the chassis used in this receiver is,
when operating, at approximately half mains
potential at all times. It is therefore essential in the
interest of safety that when serving or connecting
any test equipment the receiver should be supplied
via a suitable isolating transformer of adequate
rating.
. Replace blown fuses within the receiver with the
fuse specified in the parts list.
. When replacing wires or components to terminals
or tags, wind the leads around the terminal before
soldering. When replacing safety components
identified by the international hazard symbols on
the circuit diagram and parts list, it must be a
Toshiba approved type and must be mounted as
the original.
. Keep wires away from high temperature compo-
nents.
PRODUCT SAFETY NOTICE
Many electrical and mechanical components in this chassis have special safety-related characteristics, These
characteristics are often passed unnoticed by a visual inspection and the X-ray radiation protection afforded by
them cannot necessarily be obtained by using replacements rated at higher voltages or wattage,
Components which have these special safety characteristics in this manual and its supplements are identified by
the international hazard symbols on the schematic diagram and parts list. Before replacing any of these
components read the parts list in this manual carefully. Substitute replacement components which do not have
the same safety characteristics as specified in the parts list may create X-ray radiation.
etc.

FRONT CONTROLS AND REAR VIEWS
VIDEO-3: S-VIDEO TERMINAL MAINS SWITCH
VIDEO-3: INPUT SOCKET POWER INDICATOR
MENU SELECT REMOTE EYE
VOLUME DOWN POSITION UP
VOLUME UP POSITION DOWN
21-pin SOCKET 2 (S-VIDEO/AV)
21-pin SOCKET 1 (FULL)
HORIZ. PICTURE POSITION
AERIAL TERMINAL

REMOTE HAND HELD UNIT
KEY ASSIGNMENT
(0) dseasenied ON STAND-BY (F + ; VTR ON STAND-BY)
DK vreresescees MUTE
CALL ...... DISPLAY CALL
Few eet FUNCTION KEY FOR VTR
VTR (To push double for VTR & SERVICE Operation)
co. <TV MODE > --------- TUNING & OTHER MENU
<TEXT MODE > -----F-T-B (FULL, TOP, BOTTOM)
>” eens PICTURE MENU
d seeeines SOUND MENU
OOM ..... <TV MODE > «++ STEREO BILINGUAL
=? <TEXT MODE > ---- REVEAL / CONCEAL
1~9,0... TEN KEY
-fee 1 or 2 place
Eb) ce VIDEO INPUT (EXTERNAL INPUT SOURCE SW.)
ZA eile VOLUME
RY ah iectea: LEVEL PLUS (VOLUME, MENU)
ee ecietctas LEVEL MINUS (VOLUME, MENU)
A Ao UP (POSI., CH., TEXT PAGE)
We esesees DOWN (POSI., CH., TEXT PAGE)
TXT/TV....... TEXT, MIX, TV MODE SW.
Sas TIME DISPLAY (TV MODE)
ae oes TEXT CLEAR (TEXT MODE)
TEXT | Ghee INDEX
FLOF COLOUR KEY (4 key used)
RC) ; Red GO: Green
YO ; Yellow CO ; Cyan
TOSHIBA
To push with F Key
(ly ON STAND-BY [gl - STOP
VTR
440°" FF / CUE »> = REV / REW
CT-9678

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