SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited
No.YA258
2005/3
COLOR TELEVISION
YA258
2005
3
AV-N29F46/R, AV-N29F46/S,
AV-N34F46/Y, AV-N34F46/Z
TABLE OF CONTENTS
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27
BASIC CHASSIS
GJ5
1-2 (No.YA258)
SPECIFICATION
Design & specifications are subject to change without notice.
Items
Contents
AV-N29F46
AV-N34F46
Dimensions (W
× H × D)
82.9 cm
× 59.3 cm × 51.9 cm
93.9 cm
× 68.5 cm × 57cm
Mass
43.0 kg
64.0 kg
TV RF System
CCIR (M)
Color System
NTSC
Sound System
BTSC (Multi Channel Sound)
Teletext System
Closed Caption (T1 - T4 / CC1 - CC4)
TV Receiving Channels
and Frequency
VHF low
VHF high
UHF
CATV
02ch - 06ch: 54 MHz - 88 MHz
07ch - 13ch: 174 MHz - 216 MHz
14ch - 69ch: 470 MHz - 806 MHz
54MHz - 804 MHz
Low Band: 02 - 06
High Band: 07 - 13
Mid Band: 14 - 22
Super Band: 23 - 36
Hyper Band: 37 - 64
Ultra Band: 65 - 94, 100 - 135
Sub Mid Band: 01, 96 - 99
TV / CATV Total Channel
181 Channels
[Reception of channel A-5 ("95" of the TV set's on-screen CABLE channel) is
recommended for your TV set.]
Intermediate Frequency
Video IF
Sound IF
45.75 MHz
41.25 MHz (4.5 MHz)
Color Sub Carrier
3.58 MHz
Power Input
AC120 V, 60 Hz
Power Consumption
140 W
160 W
Picture Tube (Visible size)
68 cm (29") Measured diagonally
(H: 55.4 cm
× V: 41.4 cm)
80 cm (34") Measured diagonally
(H: 65.6 cm
× V: 49.6 cm)
High Voltage
30.0 kV ±1.3 kV [at Zero beam current]
31.4 kV ±1.3 kV [at Zero beam current]
Speaker
6.5 cm
× 13 cm, Oval type × 2
Audio Power Output
9 W + 9 W
Antenna Terminal (VHF / UHF)
F-type connector, 75
unbalanced
Video / Audio input
[Input-1/2/3]
Component Video
[Input-2]
S-video
[Input-1]
Video
Audio
RCA pin jack
× 3
Y : 1V(p-p), 75
, negative sync
Pb/Pr : 0.7 V(p-p), 75
Mini DIN 4-pin connector
× 1
Y : 1 V(p-p), 75
, negative sync
C : 0.286 V(p-p)(burst signal), 75
1 V(p-p), 75
, negative sync, RCA pin jack × 2
500 mV(rms)(-4dBs), high impedance, RCA pin jack
× 6
Audio Output (Fix)
500 mV(rms)(-4dBs), low Impedance, (400 kHz when modulated 100 %), RCA pin jack
× 2
Remote Control Unit
RM-C1258G (AA/R6/UM-3 battery
× 2)
(No.YA258)1-3
SECTION 1
PRECAUTION
1.1
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 identical to
those used in the original circuits. Service should be
performed by qualified personnel 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.
These
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 which
have these special safety characteristics are identified in
the parts list of Service manual. Electrical components
having such features are identified by shading on the
schematics and by (
) on the parts list in Service
manual. The use of a substitute replacement which does
not have the same safety characteristics as the
recommended replacement part shown in the parts list of
Service manual may cause shock, fire, or other hazards.
(4) Don't short between the LIVE side ground and
ISOLATED (NEUTRAL) side ground or EARTH side
ground when repairing.
Some model's power circuit is partly different in the GND.
The difference 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 the LIVE side GND and ISOLATED (NEUTRAL)
side GND or EARTH side GND at the same time with a
measuring apparatus (oscilloscope etc.). 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 PDP voltage setting should be
checked or adjusted.
(6) When service is required, observe the original lead dress.
Extra precaution should be given to assure correct lead
dress in the high voltage circuit area. Where a short circuit
has occurred, those components that indicate evidence of
overheating should be replaced. Always use the
manufacturer's replacement components.
(7) Isolation Check (Safety for Electrical Shock Hazard)
After re-assembling 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 jack,
control shafts, etc.) to be sure the product is safe to operate
without danger of electrical shock.
a) Dielectric Strength Test
The isolation between the AC primary circuit and all metal
parts exposed to the user, particularly any exposed metal
part having a return path to the chassis should withstand a
voltage of 3000V AC (r.m.s.) for a period of one second. (.
. . . Withstand a voltage of 1100V AC (r.m.s.) to an
appliance 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 service trade.
b) Leakage Current Check
Plug the AC line cord 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 exposed 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 tropical area, this must not exceed 0.2mA AC
(r.m.s.).
Alternate Check Method
Plug the AC line cord directly into the AC outlet (do not
use a line isolation transformer during this check.). Use
an AC voltmeter having 1000
per volt or more
sensitivity in the following manner. Connect a 1500
10W resistor paralleled by a 0.15
µF AC-type capacitor
between an exposed metal part and a known good earth
ground (water pipe, etc.). Measure the AC voltage
across the resistor with the AC voltmeter. Move the
resistor connection to each exposed metal part,
particularly any exposed metal part having a return path
to the chassis, and measure the AC voltage across the
resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Any voltage measured must
not exceed 0.75V AC (r.m.s.). This corresponds 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.).
AC VOLTMETER
(HAVING 1000 /V,
OR MORE SENSITIVITY)
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
1500 10W
0.15 F AC-TYPE
GOOD EARTH GROUND
1-4 (No.YA258)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1
FEATURES
SMART CAPTION
Smart caption will appear when you press the MUTING button,
only on channels where the broadcast contains CLOSED
CAPTION information.
SMART SOUND
Decreases high sound levels, giving a regulated sound level.
FLAT SQUARE CRT
It became legible from any position by CRT with few reflection
and reflect lumps on the flat screen.
DIGITAL COMB FILTER
By the 3 line digital comb filter, the refreshed image can be
seen.
VIDEO STATUS
Expression of a favorite screen can be chosen by the VIDEO
STATUS function.
COMPONENT INPUT
Since the component signal input terminal is equipped, it
reappears direct without deteriorating the signal from DVD.
MTS STEREO
The voice multiplex function of the MTS system is built in.
(MTS = Multi channel Television Sound system)
RETURN PLUS
You program a specific channel to return to while scanning
through the channels using the CH+ and CH - keys.
VIDEO INPUT LABEL
This function is used to label video input connections for the
onscreen displays.
BBE
High definition audio adds natural, clear and extraordinary
sound quality to any program.
2.2
MAIN DIFFERENCE LIST
2.3
HOW TO IDENTIFY MODELS
How to recognize from the appearance of the model concerned is written below. Please distinguish from several contents currently
printed on the rating label
Item
AV-N29F46/S
AV-N29F46/R
AV-N34F46/Y
AV-N34F46/Z
PICTURE TUBE (ITC)
MAIN PWB
CRT SOCKET PWB
MODEL NO.
SERIAL NO.
AV-N29F46
MODEL NAME
AV-N34F46
RA
DISTINGUISH NAME
SA
YA
ZA
(No.YA258)1-5
2.4
TECHNICAL INFORMATION
2.4.1 MAIN MI-COM (CPU) PIN FUNCTION
Pin
No.
Pin name I/O
Function
Pin
No.
Pin name
I/O
Function
1
MTS_ADJ
I
Not used
29 YC_GND
-
GND
2
AFT1
I
AFT voltage for tuner (Tuning frequency control)
30 V1_IN
I
Not used
3
KEY
I
Key scan for front control [No signal: H]
31 ABCL
I
Current for automatic beam (brightness)/contrast limit
4
uP_DVss
-
GND
32 MONITOR_OUT O Not used
5
Reset
I
CPU reset [Reset: L]
33 BLACK_DET
-
Black level detection filter
6
8MHz_OUT O CPU system clock: 8MHz oscillation
34 SVM_OUT
O Y signal for scan velocity scan modulation
7
8MHz_IN
I
CPU system clock: 8MHz oscillation
35 APL_FIL
-
Average picture level filter
8
TEST
-
GND
36 APC_FIL
-
Automatic phase control filter
9
uP_DVDD
I
5V
37 fsc_OUT
O Color sub carrier (3.58MHz) for 3-line digital comb filter [IC5201]
10 AGC_MUTE O AGC muting for tuner (when channel select) [Muting : H]
38 YC_Vcc
I
5V (for video process circuit)
11 uP_VVSS
-
GND
39 R_OUT
O R signal for CRT output
12 TV_HGND
-
GND
40 G_OUT
O G signal for CRT output
13 FBP_SCP
I
Flyback pulse (H. pulse)
41 B_OUT
O B signal for CRT output
14 HOUT
O H. drive (oscillation)
42 RGB_Vcc
I
9V (for RGB process circuit)
15 H_Vcc
I
9V (for H. oscillation start)
43 IK_IN
I
Not used
16 HAFC_1
-
H. AFC filter
44 TV_DGND
-
GND
17 Vsaw
-
V. saw filter
45 uP_AGND
-
GND
18 VOUT
O V. drive
46 uP_AVdd
-
5V
19 EW_OUT
O Parabola waveform (for sidepin correection)
47 MAIN_POWER O Power on/off switching control [Powen on: L]
20 X-RAY
I
X-ray detection (for protection) [Detection : H]
48 PANORAMA
I
Not used: Aspect size control [PANORAMA: L]
21 Ys
I
Not used
49 SDA0
I/O Data for Inter IC control bus (for various devices)
22 Cb_IN
I
Cb (external) signal
50 SCL0
O Clock for Inter IC control bus (for various devices)
23 Y_IN
I
Y (external) signal
51 SDA1
I/O Data for Inter IC control bus (for main memory)
24 Cr_IN
I
Cr (external) signal
52 A_MUTING
O Audio muting [Muting : H]
25 TV_DVcc
I
3.3V
53 SCL1
O Clock for Inter IC control bus (for main memory)
26 V3IN/CIN
I
Chroma signal (for YC separation output)
54 LED
O POWER / ON TIMER LED lndication [lighting : L]
27 EHT_IN
I
Not used
55 REMOCON
I
Remote control sensor input [No input : H]
28 V2_IN/Y_IN
I
Y signal (for YC separation output)
56 ASP_ABL
I
Not used