No.51917
Mar. 2002
AV-T2922
1
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
AV-T2922/AR
CONTENTS
!
SPECIFICATIONS
2
! SAFETY PRECAUTIONS
3
! FEATURES
4
!
FUNCTIONS
5
! SPECIFIC SERVICE INSTRUCTIONS
6
!
SERVICE ADJUSTMENTS
11
STANDARD CIRCUIT DIAGRAM (APPENDIX)
2-1
!
PARTS LIST
31
SERVICE MANUAL
COLOR TELEVISION
BASIC CHASSIS
GA
No.51917
AV-T2922
2
SPECIFICATIONS
Items
Content
Dimensions (W×
×
×
×
H×
×
×
×
D)
29-5/8 ×23-1/4 ×20-5/8 / 75.2cm×59.0cm×52.2cm
Mass
90.9Ibs / 41.3kg
TV System and Color system
TV RF System
CCIR(M), CCT R(N)
Color System
PAL-M / PAL-N / NTSC
Sound System
BTSC (Multi Channel Sound)
Picture Tube
29 (74cm) measured diagonally, Full Square
High Voltage
29kV±1.3kV (at zero beam current)
TV Receiving Frequency
VL Band
(0206) 55.25MHz83.25MHz
VH Band
(0713) 175.25MHz211.25MHz
UHF Band
(1469) 471.25MHz801.25MHz
CAT V Receiving Frequency
Low Band
(0206)
High Band
(0713)
Mid Band
(1422)
Super Band
(2336)
Hyper Band
(3764)
Ultra Band
(6594, 100125)
Sub Mid Band
(01, 9699)
Intermediate Frequency
PICTURE : 45.75MHz
Video IF Carrier
CHROMA : 42.17MHz
Sound IF Carrier
41.25MHz (4.5MHz)
Color Sub Carrier
PAL-M
3.57561149MHz
PAL-N
3.58205625MHz
NT SC
3.579545MHz
Power Input
Operating Voltage
90V260V AC, 50Hz/60Hz
Rated Voltage
120V240V AC, 50Hz/60Hz
Power Consumption
115W(max.), 85W(avg.)
Speaker
2 ×4-3/4" / 5×12cm Oval type×2
Audio Power Output
5W+5W
Input / Output terminals
Video : 1Vp-p, 75 (RCA pin jack)
Input 1, 2 (V, L/R)
Audio : 500mVrms (-4dBs), High Impedance (RCA pin jack)
Variable Audio Output
More then 01550mVrms (+6dBs )
Low Impedance (400Hz when modulated 100%) (RCA pin jack)
Antenna terminal
75(VHF/UHF) Terminal, F-Type Connector
Remote control unit
RM-C363-1H (AA/R03/UM-4 dry cell battery×2)
Design & specifications are subject to change without notice.
(55.25MHz799.25MHz)
No.51917
AV-T2922
3
SAFETY PRECAUTIONS
1. The design of this product contains special hardware, many
circuits and components specially for safety purposes. For
continued protection, no changes should be made to the original
design unless authorized in writing by the manufacturer.
Replacement parts must be identic al to thos e used in the original
circuits. Service should be performed by qualified pers onnel
only.
2. Alterations of the design or circuitry of the products should not be
made. Any design alterations or additions will void the
manufacturer's warranty and will further relieve the manufacturer
of responsibility for personal injury or property damage resulting
therefrom.
3. Many electrical and mechanical parts in the products have
special safety-related characteristics. T hese characteristics are
often not evident from visual inspection nor can the protection
afforded by them necessarily be obtained by using replacement
components rated for higher voltage, wattage, etc. Replacement
parts whic h have these special s afety characteristics are
identified in the parts list of Servic e manual. Electrical
components having su ch features are identified by shading
on the schematics and by (!
!
!
!
) on the parts list in Service
manual. The us e of a substitute replacement which does not
have the same safety characteristics as the recommended
replac ement part shown in the parts list of Service manual may
cause shock, fire, or other hazards .
4. Do n't short between the LIVE side ground and ISOL ATED
(NEUTRAL) side ground or EARTH side ground when
repairing.
Some model's power circuit is partly different in the GND. The
differenc e of the GND is shown by the LIVE : (") side GND, the
ISOLATED(NEUTRAL) : (#) side GND and EARTH : ($) side
GND. Don't short between the LIVE side GND and
ISOLATED(NEUTRAL) side GND or EARTH side GND and
never measure with a measuring apparatus (oscilloscope etc.)
the LIVE side GND and ISOLATED(NEUTRAL) side GND or
EARTH side GND at the s ame time.
If above note will not be kept, a fuse or any parts will be broken.
5. If any repair has been made to the chassis, it is recommended
that the B1 setting should be checked or adjusted (See
ADJUSTMENT OF B1 POWER SUPPLY).
6. The high voltage applied to the picture tube must conform with
that specified in Service manual. Excessive high voltage can
cause an increase in X-Ray emission, arcing and possible
component damage, therefore operation under excessive high
voltage conditions should be k ept to a minimum, or should be
prevented. If s evere arc ing occurs, remove the AC power
immediately and determine the cause by visual inspection
(incorrect installation, cracked or melted high voltage harness,
poor soldering, etc.). To maintain the proper minimum level of
soft X-Ray emission, c omponents in the high voltage circuitry
including the picture tube must be the exact replacements or
alternatives approved by the manufacturer of the c omplete
product.
7. Do not c hec k high voltage by drawing an arc. Use a high voltage
meter or a high v oltage probe with a VTVM. Discharge the
picture tube before attempting meter connection, by c onnecting
a clip lead to the ground frame and c onnecting the other end of
the lead through a 10k
2W resistor to the anode button.
8. When service is required, observe the original lead dress. Extra
prec aution should be given to assure correct lead dress in the
high voltage circuit area. W here a s hort circuit has occurred,
those components that indicate evidence of overheating should
be replaced. Always use the manufacturer's replacement
components.
9. Isolation Check
(Safety for Electrical Shock Hazard)
After re-ass embling the product, always perform an isolation
check on the exposed metal parts of the cabinet (antenna
terminals, video/audio input and output terminals, Control knobs,
metal cabinet, screw heads , earphone jac k, c ontrol shafts, etc .)
to be sure the product is s afe to operate without danger of
electrical shoc k.
(1) Dielectric Strength Test
The isolation between the AC primary circuit and all metal parts
exposed to the us er, particularly any expos ed metal part having a
return path to the chass is should withs tand a voltage of 3000V
AC (r.m.s.) for a period of one sec ond.
(. . . . Withstand a voltage of 1100V AC (r.m.s.) to an applianc e
rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated
200V or more, for a period of one second.)
This method of test requires a test equipment not generally found
in the servic e trade.
(2) Leakage Current Check
Plug the AC line c ord directly into the AC outlet (do not use a line
isolation transformer during this check.). Using a " Leakage
Current Tester", measure the leakage current from each exposed
metal part of the cabinet, particularly any expos ed metal part
having a return path to the chassis , to a known good earth
ground (water pipe, etc.). Any leakage current must not exceed
0.5mA AC (r.m.s.).
However, in tropic al area, this must not exceed 0.2mA AC
(r.m.s.).
"
"
"
"
Alternate Check Method
Plug the AC line c ord directly into the AC outlet (do not use a line
isolation transformer during this check.). Use an AC voltmeter
having 1000 ohms per volt or more sens itivity in the following
manner. Connec t a 1500
10W res istor paralleled by a 0.15µF
AC-type c apacitor between an exposed metal part and a known
good earth ground (water pipe, etc.). Meas ure the AC voltage
across the res istor with the AC voltmeter. Move the resistor
connec tion to each exposed metal part, particularly any exposed
metal part having a return path to the chassis, and measure the
AC voltage ac ross the res istor. Now, reverse the plug in the AC
outlet and repeat eac h measurement. Any voltage measured
must not exc eed 0.75V AC (r.m.s.). This c orresponds to 0.5mA
AC (r.m.s.).
However, in tropical area, this must not exceed 0.3V AC ( r.m.s.).
This corresponds to 0.2mA AC (r.m.s.).
0.15F AC-TYPE
1500
10W
GOOD EARTH GROUND
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
AC VOLTMETER
(HAVING 1000
/V,
OR MOR E SENSITIVITY)
No.51917
AV-T2922
4
FEATURES
"
The stable image proces sing circuit whic h is already acknowledged enables powerful image expression by the 29 inch big screen.
" Multifunctional remote control permits picture adjustment.
" With AUDIO / VIDEO input terminal.
"
Variable audio output terminal.
"
Adoption of the VIDEO STATUS func tion.
" Adoption of the SLEEP TIMER function.
" With 75V/U in c ommon (F-Type) antenna terminal.
" Wide range voltage (120V240V) AC power input.
" I
2C bus control utilizes single chip ICs.
"
Built-in HYPER SURROUND system.
" CLOSED CAPTION broadcasts c an be viewed.
MICRO COMPUTER PORT ASSIGNMENT (IC701)
PORT NUMBER
PORT FUNCTION
PORT NUMBER
PORT FUNCTION
1
H SYNC
27
Vcc
2
V SYNC
28
OSC1
3
RF AFC
29
OSC2
4
REMOCON
30
RESET
5
NECK
31
POW ER ON/OFF
6
SD
32
ENABLE
7
T ON/OFF
33
CLOCK
8
KEY2
34
DATA
9
KEY1
35
LOCK
10
SP ON/OFF
36
SDA2
11
NC
37
SDA1
12
NC
38
SCL2
13
NC
39
SCL1
14
AUDIO MUTE
40
Ym
15
I2C H/S
41
BUS FREE
16
NC
42
NC
17
NC
43
SELECT1
18
A Vcc
44
SELECT2
19
HLF
45
AGC MUTE
20
RVCO
46
AGC ADJ UST
21
V HOLD
47
TV / EXT
22
Composite VIDEO IN
48
X-RAY / OCP
23
CN Vss
49
Ys
24
X IN
50
B
25
X OUT
51
G
26
Vss
52
R
No.51917
AV-T2922
5
FUNCTIONS
FRONT CONTROL KEYS
MENU / OPERATE key
CHANNEL / or
OPERATE
/
keys
VOLUME / keys
POWER button
LED (indicator)
Red Power indication
Green On Timer indication
REAR TERMINAL
REMOTE CONTROL UNIT (RM-C363)
INPUT 1 (V, L/R ) terminal
INPUT 2 (V, L/R ) terminal
VARIABLE AUDIO OUT (L/R) terminal
Aerial socket (F-type connector)
DISPLAY key
CHANNEL / key
TV / VIDEO key
POWER button
CLOSED CAPTION key
CHANNEL NUMBER key
SLEEP TIMER key
HYPER SURROUND key
VIDEO STATUS key
MENU / key
COLOR SYSTEM key
MENU - / + key
EXIT key
VOLUME -/+ key