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Sanyo Service Tip USIK / YX6E CHASSIS
07/27/12
SYMPTOM: If the power LED on front of the TV is turning ON for 10-20 seconds, OFF for
1-2 second and keeps repeating, the problem is most likely IC5750A. Affected models are
the 2009 & 2010 TVs (LCD and Plasma) listed.
IC5750A is located under the large shield. IC 5750A is a 48 pin NAND FLASH IC with
easy access for replacement. This will fix +80% of the boards with the symptom below.
You must use the 3
Sanyo Part Number: QXXAVD058- - -M dashes when ordering
this IC.
Chassis IC 5700 IC 5700
Version Samsung Quimonda
P37819-00 SW84 SW82
SYMPTOM: If the power LED on front of the TV is turning ON
P42849-00 SW84 SW82
for 10-20 seconds, OFF for 1-2 second and keeps repeating, the
P42849-01 SW84 SW82
problem is most likely IC5750A. Affected models are the 2009 &
P42849-02 SW84 SW82
2010 TVs (LCD and Plasma) listed.
P42849-04 SW84 SW82
P42849-05 SW84 SW82
P46849-00 SW84 SW82
P46849-01 SW84 SW82
P46849-02 SW84 SW82
P46849-03 SW84 SW82
P46819-00 SW84 SW82
P50749-00 SW84 SW82
P50749-01 SW84 SW82
P50749-02 SW84 SW82
P50749-03 SW84 SW82
P50719-00 SW84 SW82 IC5750 to be replaced
P52449-01 SW85 SW83 Check IC manufacture for either Samsung or Quimonda
P42840-02 SW84 SW82 The IC 5750A you receive will have software 84 installed in it. If
P42840-03 SW84 SW82 IC 5700's manufacture is Quimonda or TV is a 52" then the
P42840-04 SW84 SW82 software will need to be changed with the use of a USB drive.
P46840-01 SW84 SW82
P46840-02 SW84 SW82 Note : Only use this software in the Sanyo TVs listed.
If used in wrong chassis, it could cause TV not to come
P50740-01 SW84 SW82 on and IC 5750 will need to be changed again.
09/24/10
2009-2A
SANYO
TROUBLESHOOTING GUIDE
(ONLY FOR 2009 MODELS)
This guide is divided into 4 sections/pages depending on type of defect:
page 1) No Green LED Power Light (LED never turns "ON")
page 2) Green LED Light is "ON", but Backlights are not "ON", or only turn "ON &
then OFF".
page 3) Green LED Light is "ON", and Backlights are "ON", but there is no video/OSD.
page 4) Green LED Light turns "ON", but turns "OFF" within 10 seconds.
Please select the section/page that matches your defect and follow the flow chart.
Only these models can use this guide:
DP26649 (except DP26649-03)
DP32649 (except DP32649-05)
DP42849
DP46819
DP46849
PLEASE KEEP THIS GUIDE.
IT WILL NOT BE PROVIDED FOR EVERY REPAIR.
[email protected]
Repair Flow Chart: Trouble Condition page 1
Green Power LED does NOT turn on.
The TV is Dead.
Green Power LED:
Does not turn on.
The TV is dead.
On Main Signal Bd.: no: 0V
Is the "5V_STBY" voltage
supplied?
(see TABLE *1)
Unplug (K8B) connector on Main Bd. no: 0V Power Bd. is not working.
On Power Bd.:
Replace "Power Bd."
Is the "5V_STBY"voltage supplied?
(see TABLE *2)
yes: 5V
yes: 5V
Replace "Main Bd."
and "Wiring Harness"
Confirm wire harness connections.
And confirm LED again.
On Main Signal Bd. no: 0V
Is the "5V_STBY" voltage
on "K8CTR 1Pin" ?
Main Bd. is not working.
yes: 5V Replace "Main Bd".
While pushing the
"Power Key SW": is the 5V from No voltage (0V) at K8CTR pin 3, or 5V always present.
"KEY SW" supplied to "K8CTR
3pin"?
Key Switch Assy. unit will be broken.
Replace "Key Switch Assy."
yes
Main Bd. is not working.
Replace "Main Bd"
(TABLE *1) Main Bd.: 5V_STBY Test Points
Model 5V_STBY on Main Bd. Confirmation Voltage
US1J 26", 32" Main K8B "4pin" or Main L1705 5V
US1K 42", 46" Main K8B "3pin" or Main L1602 5V
(TABLE *2) Power Bd.: 5V_STBY Test Points
Model 5V_STBY on Power Bd. Confirmation Voltage
US1J 26", 32" Power CN2 "4pin" 5V
US1K 42", 46" Power CN2 "3pin" 5V
Repair Flow Chart: Trouble Condition page 2
Green Power LED is on, but LCD backlights are not on.
Backlights are off, or only turn on and back off.
Power LED turns on.
But, LCD Backlight is not on.
On Main Bd.:
Are the 12V and 24V supplied from no: 0V
Pwer Bd.?
(see TABLE*1)
On Main Bd. Main Bd. is not working.
Is 5V supllied to "Power ON/OFF SW" no: 0V
Replace "Main Bd."
(see TABLE*2)
yes
yes: 5V
Replace: "Power Bd."
and "Wire Harness"
On Main Bd.:
Is the "BL_ON" voltage (3.3V) no: 0V
supplied from Main Bd.?
(see TABLE*3)
Main Bd. is not working.
Replace "Main Bd."
yes: 3.3V
Confirm wire harness connection. note #1
Especially between Power Bd. and If the model is DP46849-00, DP46849-03, or DP46819-00 ,
Inverter Bd. please order the SMPS, in adition to the Inverter. These
Yes. versions have a HV Transformer that may not be working.
Change the SMPS first, if that does not fix the no BL
problem, then change the Inverter.
Inverter Bd. or LCD Panel is not working. This note only applies to these three 46" units.
1st: Replace "Inverter Bd." (see note #1)
If Inverter Bd. does not correct problem, then:
2nd: Replace "LCD Panel"
(TABLE *1) Main Bd.: 12V & 24V Test Points
Model 12V on Main Bd. Confirmation Voltage
US1J 26", 32" Main K8B "8pin" or Main L1604 12 V
US1K 42", 46" Main K8B "8pin" or Main L1604 12 V
Model 24V on Main Bd. Confirmation Voltage
US1J 26", 32" Main K8B "12pin" or Main L1712 24 V
US1K 42", 46" Main K8B "12pin" or Main L1613 42"(00 ver) = 24V, 42"(01 ver) = 15V, 46" = 16V
(TABLE *2) Main Bd.: "Power ON/OFF SW" Test Points
Model Power ON/OFF SW on Main Bd. Confirmation Voltage
US1J 26", 32" Main K8B "1pin" or Main R1702 5V
US1K 42", 46" Main K8B "1pin" or Main R1600 5V
(TABLE *3) Main Bd.: "BL_ON" Test Points
Model 5V_STBY on Power Bd. Confirmation Voltage
US1J 26", 32" Main K8L "3pin" or Main R1754 3.3 V
US1K 42", 46" Main K8L "3pin" or Main R1829 3.3 V
(TABLE *4) Power Bd.: "24V" Test Points
Model 5V_STBY on Power Bd. Confirmation Voltage
US1J 26", 32" Main K8L "3pin" or Main R1754 3.3 V
US1K 42", 46" Main K8L "3pin" or Main R1829 3.3 V
Repair Flow Chart: Trouble Condition page 3
Green Power LED and LCD backlights are on,
but no video or OSD.
LCD Backlights are ON.
But, TV has no video or OSD.
On Main Bd.:
Are the 12V and 24V supplied no: 0V
from Pwer Bd.?
(see TABLE*1)
Replace "Power Bd."
yes and "Wire harness".
Is power to T-CON supllied no: 0V
from Main Bd.?
(see TABLE*2)
Main Bd. is not working.
yes Replace "Main Bd."
Is LVDS Clock outputed? no: 0V or 1.1V constant
(see TABLE*3)
Main Bd. is not working.
Replace "Main Bd."
yes
Confirm LVDS cable connection.
And check for video/OSD again.
T. Cnt. Bd. or LCD Panel is not working.
1st: Replace "T. Cnt. Bd. & LVDS Cable".
If T. Cnt. Bd. & LVDS Cable does not
correct problem, then:
2nd: Replace "LCD Panel"
(TABLE *1) Main Bd.: 12V & 24V Test Points
Model 12V on Main Bd. Confirmation Voltage
US1J 26", 32" Main K8B "8pin" or Main L1604 12 V
US1K 42", 46" Main K8B "8pin" or Main L1604 12 V
Model 24V on Main Bd. Confirmation Voltage
US1J 26", 32" Main K8B "12pin" or Main L1712 24 V
US1K 42", 46" Main K8B "12pin" or Main L1613 42"(00 ver) = 24V, 42"(01 ver) = 15V, 46" = 16V
(TABLE *2) Main Bd.: "T-CON Power supply" Test Points
Model Power ON/OFF SW on Main Bd. Confirmation Voltage
US1J 26", 32" Main K5LV "29pin" or Main RB6301 12 V
US1K 42", 46" Main K5LVDS "36pin" or Main L6309 12 V
(TABLE *3) Main Bd.: "LVDS Clock" Test Points
Model LVDS Clock on Main Bd. Confirmation Voltage
US1J 26", 32" Main K5LV "29pin" About 70MHz Clock
US1K 42", 46" Main K5LVDS "12pin" About 70MHz Clock
Repair Flow Chart: Trouble Condition page 4
Power LED turns OFF within 10 sec of Power ON.
Power LED turns OFF within
10 sec of Power ON.
On Main Bd.:
Is 5V supplied to "Power_SW"
no: 0V
during LED ON time?
(see TABLE*1)
Main Bd. Is not working.
yes
Replace "Main Bd."
Are 12V and 24V supplied
from Pwer Bd. during LED ON
no: 0V
time?
(see TABLE*2)
Pwer Bd. is not working.
yes Replace "Power Bd." and
"Wire Harness".
Unplug cable from Power Bd. to
Inverter Bd.: yes
Is this symptom changed?
Inverter Bd. Is not working.
no Replace "Inverter Bd."
Unplug cable from Main Bd. to yes
T. Cnt. Bd.:
Is this symptom changed?
No. T. Cnt. Bd. is not working.
Replace "T. Cnt. Bd."
Main Bd. is not working.
Replace "Main Bd."
(TABLE *1) Main Bd.: "Power ON/OFF SW" Test Points
Model 12V on Main Bd. Confirmation Voltage
US1J 26", 32" Main K8B "1pin" or Main R1702 5V
US1K 42", 46" Main K8B "1pin" or Main R1600 5V
(TABLE *2) Main Bd.: 12V & 24V Test Points
Model 12V on Main Bd. Confirmation Voltage
US1J 26", 32" Main K8B "8pin" or Main L1604 12 V
US1K 42", 46" Main K8B "8pin" or Main L1604 12 V
Model 24V on Main Bd. Confirmation Voltage
US1J 26", 32" Main K8B "12pin" or Main L1712 24 V
US1K 42", 46" Main K8B "12pin" or Main L1613 42"(00 ver) = 24V, 42"(01 ver) = 15V, 46" = 16V
FILE NO.
SERVICE MANUAL Remote Control Digital DP46849 (U.S.A.)
Color Television (CANADA)
ORIGINAL VERSION
Chassis No. P46849-00
NOTE: Match the Chassis No. on
the unit's back cover with
the Chassis No. in the
Service Manual.
If the Original Version
Service Manual Chassis
No. does not match the
unit's, additional Service
Literature is required. You
must refer to "Notices" to the
Original Service Manual
prior to servicing the unit.
Servicing should be performed by only trained and qualified service personnel.
Contents Specifications
SAFETY INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . 2 POWER RATING . . . . . . . . . . . . . . . . . . . . . . . . . 120VAC
SERVICE ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . 3 216 W (AVG.)
ON-SCREEN SERVICE MENU . . . . . . . . . . . . . . . . . . . . . 4 ANTENNA INPUT IMPEDANCE. . . . . . . . . . . . . . . . . 75
POWER FAILURE CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . 5 UHF/VHF/CATV
MECHANICAL DISASSEMBLY . . . . . . . . . . . . . . . . . . . . 6 DIGITAL
CHASSIS ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . 8