Sony KLV-S19A10T / KLV-S23A10T (serv.man2) Service Manual ▷ View online
6
KLV-S19A10T/S23A10T
KLV-S19A10T/S23A10T
WARNINGS AND CAUTIONS
CAUTION
These servicing instructions are for use by qualifi ed service personnel only. To reduce the risk of electric shock, do not perform any
servicing other than that contained in the operating instructions unless you are qualifi ed to do so.
servicing other than that contained in the operating instructions unless you are qualifi ed to do so.
WARNING!!
An isolation transformer should be used during any service to avoid possible shock hazard, because of live chassis. The chassis of
this receiver is directly connected to the ac power line.
this receiver is directly connected to the ac power line.
!
SAFETY-RELATED COMPONENT WARNING!!
Components identifi ed by shading and ! mark on the schematic diagrams, exploded views, and in the parts list are critical for safe
operation. Replace these components with Sony parts whose part numbers appear as shown in this manual or in supplements
published by Sony. Circuit adjustments that are critical for safe operation are identifi ed in this manual. Follow these procedures
whenever critical components are replaced or improper operation is suspected.
operation. Replace these components with Sony parts whose part numbers appear as shown in this manual or in supplements
published by Sony. Circuit adjustments that are critical for safe operation are identifi ed in this manual. Follow these procedures
whenever critical components are replaced or improper operation is suspected.
The circuit boards used in these models have been processed using
Lead Free Solder. The boards are identified by the LF logo located
close to the board designation e.g. H1 etc [ see example ]. The
servicing of these boards requires special precautions to be taken as
outlined below.
Lead Free Solder. The boards are identified by the LF logo located
close to the board designation e.g. H1 etc [ see example ]. The
servicing of these boards requires special precautions to be taken as
outlined below.
example 1
It is strongly recommended to use Lead Free Solder material in order to guarantee optimal quality of new solder joints.
Lead Free Solder is available under the following part numbers :
Lead Free Solder is available under the following part numbers :
Due to the higher melting point of Lead Free Solder the soldering iron tip temperature needs to be set to 370 degrees centigrade.
This requires soldering equipment capable of accurate temperature control coupled with a good heat recovery characteristics.
This requires soldering equipment capable of accurate temperature control coupled with a good heat recovery characteristics.
For more information on the use of Lead Free Solder, please refer to http://www.sony-training.com
r
e
b
m
u
n
t
r
a
P
r
e
t
e
m
a
i
D
s
k
r
a
m
e
R
9
1
-
5
0
0
-
0
4
6
-
7
m
m
3
.
0
g
K
5
2
.
0
0
2
-
5
0
0
-
0
4
6
-
7
m
m
4
.
0
g
K
0
5
.
0
1
2
-
5
0
0
-
0
4
6
-
7
m
m
5
.
0
g
K
0
5
.
0
2
2
-
5
0
0
-
0
4
6
-
7
m
m
6
.
0
g
K
5
2
.
0
3
2
-
5
0
0
-
0
4
6
-
7
m
m
8
.
0
g
K
0
0
.
1
4
2
-
5
0
0
-
0
4
6
-
7
m
m
0
.
1
g
K
0
0
.
1
5
2
-
5
0
0
-
0
4
6
-
7
m
m
2
.
1
g
K
0
0
.
1
6
2
-
5
0
0
-
0
4
6
-
7
m
m
6
.
1
g
K
0
0
.
1
7
KLV-S19A10T/S23A10T
KLV-S19A10T/S23A10T
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
safety checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly soldered
connections. Check the entire board surface for solder splashes and
bridges.
bridges.
2. Check the interboard wiring to ensure that no wires are “pinched” or
touching high-wattage resistors.
3. Check that all control knobs, shields, covers, ground straps, and
mounting hardware have been replaced. Be absolutely certain that
you have replaced all the insulators.
you have replaced all the insulators.
4. Look for unauthorized replacement parts, particularly transistors,
that were installed during a previous repair. Point them out to the
customer and recommend their replacement.
customer and recommend their replacement.
5. Look for parts which, though functioning, show obvious signs of
deterioration. Point them out to the customer and recommend their
replacement.
replacement.
6. Check the line cords for cracks and abrasion. Recommend the
replacement of any such line cord to the customer.
7. Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
described below.
Leakage Test
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instructions.
instructions.
2. A battery-operated AC milliampmeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate low voltage scale.
The Simpson’s 250 and Sanwa SH-63TRD are examples of
passive VOMs that are suitable. Nearly all battery-operated digital
multimeters that have a 2 VAC range are suitable (see Figure A).
V, so analog meters must have an accurate low voltage scale.
The Simpson’s 250 and Sanwa SH-63TRD are examples of
passive VOMs that are suitable. Nearly all battery-operated digital
multimeters that have a 2 VAC range are suitable (see Figure A).
How to Find a Good Earth Ground
A cold-water pipe is a guaranteed earth ground; the cover-plate
retaining screw on most AC outlet boxes is also at earth ground. If the
retaining screw is to be used as your earth ground, verify that it is at
ground by measuring the resistance between it and a cold-water pipe
with an ohmmeter. The reading should be zero ohms.
A cold-water pipe is a guaranteed earth ground; the cover-plate
retaining screw on most AC outlet boxes is also at earth ground. If the
retaining screw is to be used as your earth ground, verify that it is at
ground by measuring the resistance between it and a cold-water pipe
with an ohmmeter. The reading should be zero ohms.
If a cold-water pipe is not accessible, connect a 60- to 100-watt
trouble- light (not a neon lamp) between the hot side of the receptacle
and the retaining screw. Try both slots, if necessary, to locate the hot
side on the line; the lamp should light at normal brilliance if the screw
is at ground potential (see Figure B).
trouble- light (not a neon lamp) between the hot side of the receptacle
and the retaining screw. Try both slots, if necessary, to locate the hot
side on the line; the lamp should light at normal brilliance if the screw
is at ground potential (see Figure B).
To Exposed Metal
Parts on Set
Parts on Set
0.15 F
Earth Ground
AC
Voltmeter
(0.75V)
Voltmeter
(0.75V)
Trouble Light
AC Outlet Box
Ohmmeter
Cold-water Pipe
Figure A. Using an AC voltmeter to check AC leakage.
Figure B. Checking for earth ground.
8
KLV-S19A10T/S23A10T
KLV-S19A10T/S23A10T
SELF-DIAGNOSTIC FUNCTION
Self Diagnosis
Supported model
Control Buttons
(1) POWER
TOP PANEL BUTTON
(2) CHANNEL +
(4) VOLUME +
(3) CHANNEL -
(5) VOLUME -
(6) TV/VIDEO
(7) WEGA GATE
(8) ENTER
(1) POWER
FRONT PANEL LED
(2) TIMER
(3) PIC OFF
Description of LED Indictors
LED
LED Type
Description
* Light is green when the TV set is on
* Functions as failure indicator
* Blinks green in aging mode
* Functions as failure indicator
* Blinks green in aging mode
TIMER LED
Red LED
Lights when timer is set
PIC OFF LED
Green LED
Lights when power saving setting is set to
picture off (See Instruction Manual)
picture off (See Instruction Manual)
POWER LED
Red/Green LED
9
KLV-S19A10T/S23A10T
KLV-S19A10T/S23A10T
LED Control
STATUS
POWER LED
TIMER LED
PICTURE OFF
LED
REMARKS
Power Off
Off
Off
Off
Power off using the power switch or
remote control. NOTE: Standby
state does not exist in WAX;
however, the microcomputer does
enter into sleep mode.
remote control. NOTE: Standby
state does not exist in WAX;
however, the microcomputer does
enter into sleep mode.
Power Off
Lights Green
Off
Off
Microcomputer working normally.
Failure
Blinks Red
Off
Off
Failure causes are classified by the
number of time the red light blinks.
number of time the red light blinks.
Aging
Blinks Green
Off
Off
Aging mode is classified by a blinking
green light.
green light.
Picture Off
Lights Green
Off
Lights Green
No display (black screen).
Lights Green
Lights Red
Off
When SLEEP TIMER is set during
power on.
power on.
Lights Green
Lights Red
Lights Green
When SLEEP TIMER is set in
Picture Off mode.
Picture Off mode.
Off
Lights Red
Off
When ON TIMER is set and power is
off.
off.
Lights Green
Lights Red
Off
When ON TIMER is set and power is
on.
on.
Lights Green
Lights Red
Lights Green
When ON TIMER is set in Picture Off
mode.
mode.
SLEEP TIMER
ON TIMER
The units in this manual contain a self-diagnostic function. If an error occurs, the POWER LED will automatically begin to fl ash. The number of times
the LED fl ashes translates to a probable source of the problem. A defi nition of the POWER LED fl ash indicators is listed in the instruction manual for
the user’s knowledge and reference. If an error symptom is diffi cult to reproduced use the Remote Commander to display the record that is stored at
the internal NVM to specify the cause of the failure.
the LED fl ashes translates to a probable source of the problem. A defi nition of the POWER LED fl ash indicators is listed in the instruction manual for
the user’s knowledge and reference. If an error symptom is diffi cult to reproduced use the Remote Commander to display the record that is stored at
the internal NVM to specify the cause of the failure.
Diagnostic Test Indicators
When an error occurs, the POWER LED will fl ash a set number of times to indicate the possible cause of the problem. If there is more than one error,
the LED will identify the fi rst of the problem areas. If the errors occur simultaneously, the one that corresponds to the fewest fl ashes is identifi ed fi rst.
Results for all of the following diagnostic items are displayed on screen. No error has occurred if the screen displays a “0”.
When an error occurs, the POWER LED will fl ash a set number of times to indicate the possible cause of the problem. If there is more than one error,
the LED will identify the fi rst of the problem areas. If the errors occur simultaneously, the one that corresponds to the fewest fl ashes is identifi ed fi rst.
Results for all of the following diagnostic items are displayed on screen. No error has occurred if the screen displays a “0”.
Number of Times
POWER LED Blinks
Monitoring Item
1 Time
Abnormal AU Power Voltage (DCALERT 3)
2 Times
Abnormal D5V/A9V Power Voltage (DCALERT 2)
3 Times
Abnormal Panel Voltage (DCALERT 1)
4 Times
Backlight Failure
5 Times
Abnormal Main Power Voltage
6 Times
Abnormal Speaker Voltage
7 Times
Internal Temperature Rise (mainly on the panel side)
Click on the first or last page to see other KLV-S19A10T / KLV-S23A10T (serv.man2) service manuals if exist.