background image
SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited
No.YA057C
2005/6
COLOR TELEVISION
YA057C
2005
6
AV-32F475/Y, AV-32F475/Z,
AV-32F485/Z
HOW TO IDENTIFY MODELS
DIFFERENCE LIST
EXPLODED VIEW PARTS LIST -2 (Page 3-4)
PRINTED WIRING BOARD PARTS LIST
MAIN P.W. BOARD ASS'Y
Supplementary
The following items for the AV-32F475/Y, AV-32F475/Z and AV-32F485/Z were changed partly.
Therefore, this service manual describes only the items which differ from those of the AV-32F475/Y, AV-32F475/Z
and AV-32F485/Z service manual.
For details other than those described in this manual, please refer to the AV-32F475/Y, AV-32F475/Z and AV-32F485/Z
service manual (No.YA057, 2004/3) (No.YA057B, 2004/11).
MODEL
SERIAL NUMBER
AV-32F475/Y
"16920001" or later are the subject.
AV-32F475/Z
"16923206" or later are the subject.
AV-32F485/Z
"16920131" or later are the subject.
Ref. No.
Part No.
PART NAME
DESCRIPTION
Before
After
T502
QQH0154-001
QQH0175-001
FB TRANSF
Ref. No.
Part No.
PART NAME
DESCRIPTION
Before
After
R502
NRSA63J-271X
NRSA63J-221
MG RESISTOR
220
1/16W J
BASIC CHASSIS
GJ4


background image
(No.YA057C)
AV & MULTIMEDIA COMPANY DISPLAY CATEGORY 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan
Victor Company of Japan, Limited
VPT
Printed in Japan
SECTION 1
PRECAUTION
Please refer to "AV-32F475/Y, AV-32F475/Z and AV-32F485/Z (No.YA057)" about this section.
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
Please refer to "AV-32F475/Y, AV-32F475/Z and AV-32F485/Z (No.YA057)" about this section.
SECTION 3
DISASSEMBLY
Please refer to "AV-32F475/Y, AV-32F475/Z and AV-32F485/Z (No.YA057)" about this section.
SECTION 4
ADJUSTMENT
Please refer to "AV-32F475/Y, AV-32F475/Z and AV-32F485/Z (No.YA057)" about this section.
SECTION 5
TROUBLESHOOTING
Please refer to "AV-32F475/Y, AV-32F475/Z and AV-32F485/Z (No.YA057)" about this section.


background image
SERVICE MANUAL
COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED
No.YA057
2004/3
COLOR TELEVISION
YA057
2004
3
AV-32F475 /Y, AV-32F475 /Z,
AV-32F485 /Y, AV-32F485 /Z
TABLE OF CONTENTS
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
5
TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
BASIC CHASSIS
GJ4


background image
1-2 (No.YA057)
SPECIFICATION
Design & specifications are subject to change without notice.
Items
Contents
AV-32F475
AV-32F485
Dimensions (W
× H × D)
93.9 cm
× 68.5 cm × 57cm (37" × 27" × 22-1/2")
Mass
64.0kg (140.8Ibs)
TV RF System
CCIR (M)
Color System
NTSC
Sound System
BTSC (Multi Channel Sound)
TV Receiving Channels
and Frequency
VHF low
VHF high
UHF
CATV
02ch~06ch : 54MHz~88MHz
07ch~13ch : 174MHz~216MHz
14ch~69ch : 470MHz~806MHz
54MHz~804MHz
Low Band : 02~06, A-8 by 02~06&01
High Band : 07~13 by 07~13
Mid Band : A~I by 14~22
Super Band : J~W by 23~36
Hyper Band : W+1~W+28 by 37~64
Ultra Band : W+29~W+84 by 65~125
Sub Mid Band : A8, A4~A1 by 01, 96~99
TV / CATV Total Channel
180 Channels
Intermediate Frequency
Video IF
Sound IF
45.75 MHz
41.25 MHz (4.5MHz)
Color Sub Carrier
3.58 MHz
Power Input
AC120V, 60Hz
Power Consumption
160W
Picture Tube (Visible size)
80cm (32") Measured diagonally (H : 65.6cm
× W : 49.6cm)
High Voltage
31.4kV ±1.3kV [at Zero beam current]
Speaker
6.5cm
× 13cm (2-1/2" × 5"), Oval type × 2
Audio Power Output
7.5W + 7.5W
9W + 9W
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), negative sync, 75
Pb/Pr : 0.7V(p-p), 75
Mini DIN 4-pin
× 1
Y : 1V(p-p), negative sync, 75
C : 0.286V(p-p)(burst signal), 75
1V(p-p), negative sync, 75
, RCA pin jack × 3
500mV(rms)(-4dBs), high impedance, RCA pin jack
× 6
Audio Output (Fix)
500mV(rms)(-4dBs), low Impedance, (400kHz when modulated 100%),
RCA pin jack
× 2
Remote Control Unit
RM-C1258G (AA/R6/UM-3 battery
× 2)


background image
(No.YA057)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) Use isolation transformer when hot chassis.
The chassis and any sub-chassis contained in some products are
connected to one side of the AC power line. An isolation
transformer of adequate capacity should be inserted between the
product and the AC power supply point while performing any
service on some products when the HOT chassis is exposed.
(5) Don't short between the LIVE side ground and ISOLATED (NEU-
TRAL) side ground or EARTH side ground when repairing.
Some model's power circuit is partly different in the GND. The differ-
ence of the GND is shown by the LIVE : (
) side GND, the ISOLAT-
ED (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.
(6) If any repair has been made to the chassis, it is recommended that
the B1 setting should be checked or adjusted (See B1 POWER
SUPPLY check).
(7) 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 kept to a minimum, or should be prevented.
If severe arcing 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,
components in the high voltage circuitry including the picture tube
must be the exact replacements or alternatives approved by the
manufacturer of the complete product.
(8) Do not check high voltage by drawing an arc. Use a high voltage
meter or a high voltage probe with a VTVM. Discharge the picture
tube before attempting meter connection, by connecting a clip lead
to the ground frame and connecting the other end of the lead
through a 10k
2W resistor to the anode button.
(9) 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.
(10) 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 1100V AC
(r.m.s.) for a period of one second.
(. . . . Withstand a voltage of 1100V AC (r.m.s.) to an appliance rat-
ed 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.).
(11) High voltage hold down circuit check.
After repair of the high voltage hold down circuit, this circuit shall
be checked to operate correctly.See item "How to check the high
voltage hold down circuit".
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
PWB
White line side
WHT
PW
POWER CORD
REPLACEMENT WARNING.
Connecting the white line side of power
cord to "WHT" character side.
A
V
This mark shows a fast
operating fuse, the
letters indicated below
show the rating.