Special components are used in this television set which are important for safety. These parts are identified on the schematic
diagram by the symbol . It is essential that these critical parts are replaced with the manufacturer’s specified replacement
parts to prevent X-ray radiation, shock, fire or other hazards. Do not modify the original design without manufacturer’s permission.
!
Contents
ABOUT LEAD FREE SOLDER (PBF) ........................................................ 3
REPLACEMENT MECHANICAL PARTS LIST .......................................... 27
REPLACEMENT ELECTRICAL P ARTS LIST ............................................ 28
General Guidelines
An Isolation Transformer should always be used during the servicing
of a receiver whose chassis is not isolated from the AC power line.
Use a transformer of adequate power rating as this protects the
technician from accidents resulting in personal injury from electrical
shocks. It will also protect the Receiver from being damaged by
accidental shorting that may occur during servicing.
When servicing, observe the original lead dress, especially in the high
voltage circuit. Replace all damaged parts (also parts that show signs
of overheating.)
Always Replace Protective Devices, such as fishpaper, isolation
resistors and capacitors, and shields after servicing the Receiver. Use
•
only manufacturer’s recommended rating for fuses, circuit breakers,
etc.
High potentials are present when this Receiver is operating. Operation
of the Receiver without the rear cover introduces danger from electrical
shock. Servicing should not be performed by anyone who is not
thoroughly familiar with the necessary precautions when servicing
high-voltage equipment.
Extreme care should be practiced when Handling the Picture Tube.
Rough handling may cause it to implode due to atmospheric pressure
(14.7 lbs per sq. in). Do not sick or scratch the glass or subject it to any
undue pressure. When handling, use safety goggles and heavy gloves
for protection. Discharge the picture tube by shorting the anode to
chassis ground (not to the cabinet or to other mounting hardware).
When discharging, connect cold ground (i.e. dag ground lead) to the
anode with a well insulated wire or use a grounding probe.
Avoid prolonged exposure at close range to unshielded areas of the
picture tube to prevent exposure to X-ray radiation.
The Test Picture Tube used for servicing the chassis at the bench
should incorporate safety glass and magnetic shielding. The safety
glass provides shielding for the tube viewing area against X-ray radiation
as well as implosion. The magnetic shield limits X-ray radiation around
the bell of the picture tube in addition to restricting magnetic effects.
When using a picture tube test jig for service, ensure that the jig is
capable of handling 31kV without causing X-ray radiation.
Before returning a serviced receiver to the owner, the service technician
must thoroughly test the unit to ensure that is completely safe to operate.
Do not use a line isolation transformer when testing.
- 2 -
!
Warning !
It is essential that these critical parts are replaced
with the manufacturer’s specified replacement parts
to prevent X-ray radiation, shock, fire or other hazards.
In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that
contains lead.
We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin (Sn),
Silver, (Ag), and Copper, (Cu).
This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair
work we suggest using the same type of solder although, with some precautions, standard Pb solder can also be used.
Caution
• PbF solder has a melting point that is 50° ~ 70° F, (30° ~ 40°C) higher than Pb solder. Please use a soldering iron with
temperature control and adjust it to 700° ± 20° F, (370° ± 10°C).In case of using high temperature soldering iron, please be
careful not to heat too long.
• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100°F, (600°C).
• If you must use Pb solder on a PCB manufactured using PbF solder, remove as much of the original PbF solder as possible
and be sure that any remaining is melted prior to applying the Pb solder.
• When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the
opposite side (See figure, below).
SUGGESTED PbF SOLDER
There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper,
(Sn+Ag+Cu), you can also use Tin and Copper, (Sn+Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufac
turer’s specific instructions for the melting points of their products and any precautions for using their product with other
materials.
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.
HOW TO RECOGNIZE THAT PB FREE SOLDER IS USED
P.C.Boards marked as “PbF” use Pb Free solder. (See the figure below.) Pb Free is not used the Power Supply Board of this
unit.
(Example : Digital Board)
1GNDSUPPLYGround Platform
2VSUP8.0AUSUPPLYSupply Voltage Analog Audio, 8.0 V
3VREFAUReference Voltage, Audio
4SPEAKERLOUTAnalog Loudspeaker Output, Left
5SPEAKERROUTAnalog Loudspeaker Output, Right
6AOUT1LOUTAnalog Audio 1 Output, Left
7AOUT1ROUTAnalog Audio 1 Output, Right
8AIN3L / AOUT2LIN / OUTAnalog Audio 3 Input, Left
9AIN3R / AOUT2R IN / OUTAnalog Audio 3 Input, Right
10AIN2LINAnalog Audio 2 Input, Left
11AIN2RINAnalog Audio 2 Input, Right
12AIN1LINAnalog Audio 1 Input, Left
13AIN1R / SIFIN/OUTAnalog Audio 1 Input, Right
14T AG COUTTuner AGC Output
15VREFIFReference Voltage, IF ADC
16IFIN-INDifferential IF Input
17IFIN+INDifferential IF Input
18RESETQIN/OUTReset Input/Output
19VSUP5.0FESUPPLYSupply Voltage Analog IF Front-end, 5.0 V
20VSUP5.0IFSUPPLYSupply Voltage IF ADC, 5.0 V
21VSUP3.3DIGSUPPLYSupply Voltage Digital Core, 3.3 V
22GNDSUPPLYGround Platform
23GNDSUPPLYGround Platform
24VSUP1.8DIGSUPPLYSupply Voltage Digital Core, 1.8 V
25XTAL1INAnalog Crystal Input
26XTAL2OUTAnalog Crystal Output
27P22IN/OUTPort 2, Bit 2 Input/Output
28P23IN/OUTPort 2, Bit 3 Input/Output
29VIN11INAnalog Video 11 Input
30VIN10INAnalog Video 10 Input
31VIN9INAnalog Video 9 Input
32VIN8INAnalog Video 8 Input
33VIN7INAnalog Video 7 Input
34VIN6INAnalog Video 6 Input
35VIN5INAnalog Video 5 Input
36VIN4INAnalog Video 4 Input
37VIN3INAnalog Video 3 Input
38VIN2INAnalog Video 2 Input
39VIN1INAnalog Video 1 Input
40VOUT1OUTAnalog Video 1 Output
41VOUT2OUTAnalog Video 2 Output
42VOUT3OUTAnalog Video 3 Output
43VSUP1.8FESUPPLYSupply Voltage Analog Video Front-end, 1.8 V
44GNDSUPPLYGround Platform
45GNDSUPPLYGround Platform
46VSUP3.3FESUPPLYSupply Voltage Analog Video Front-end, 3.3 V
47P10IN/OUTPort 1, Bit 0 Input/Output
48P11IN/OUTPort 1, Bit 1 Input/Output
49P12IN/OUTPort 1, Bit 2 Input/Output
50P13IN/OUTPort 1, Bit 3 Input/Output
51P14IN/OUTPort 1, Bit 4 Input/Output
52P15IN/OUTPort 1, Bit 5 Input/Output
53P16IN/OUTPort 1, Bit 6 Input/Output
54P17IN/OUTPort 1, Bit 7 Input/Output
55P20IN/OUTPort 2, Bit 0 Input/Output
56P21IN/OUTPort 2, Bit 1 Input/Output
57SCLIN/OUTI2C Bus Clock Input/Output
58SDAIN/OUTI2C Bus Data Input/Output
59VPROTINVertical Protection Input
60HOUTOUTHorizontal Drive Output
61HFLBINHorizontal Flyback Input
62SAFETYINSafety Input
63GNDDACSUPPLYGround Video DACs
64VSUP3.3DACSUPPLYSupply Voltage Video DACs, 3.3 V
65VSUP3.3IOSUPPLYSupply Voltage I/O Ports, 3.3 V
66GNDSUPPLYGround Platform
67GNDSUPPLYGround Platform
68VSUP3.3BESUPPLYSupply Voltage Analog Video Back-end, 3.3 V
69XREFReference Current for RGB DACs
70VRDReference Voltage for RGB DACs
71BOUTOUTAnalog Blue Output
72GOUTOUTAnalog Green Output
73ROUTOUTAnalog Red Output
74SVMOUTOUTScan Velocity Modulation Output
75BININAnalog Blue Input, Back-end
76GININAnalog Green Input, Back-end
77RININAnalog Red Input, Back-end
78FBININFast Blank Input, Back-end
79GNDMINReference Ground for Sense ADC
80SENSEINSense ADC Input
81RSW1OUTRange Switch 1 Output
82RSW2OUTRange Switch 2 Output
83EWOUTVertical Parabola Output
84VERT-OUTDifferential Vertical Sawtooth Output
85VERT+OUTDifferential Vertical Sawtooth Output
86TEST / SUBWIN / OUTTest Input, reserved for Test Subwoofer Output
87VSUP5.0BESUPPLYSupply Voltage Analog Video Back-end, 5.0 V
88GNDSUPPLYGround Platform
Key 3 / 4Previous / next item
Key 8 / 9Adjusts bright (user) (–/+)
UP/DOWNChannel Up / Channel Down
Volume +Increment of selected item
Volume –Decrement of selected item
OKStore / saves selected item
NormalExit the service mode
Obs: The vertical and horizontal deflection adjustments, in the SERVICE
MODE 1, was made in 50Hz power source frequency.
How to operate the controls in the SERVICE MODE 2
à
Key 3 / 4Previous / next item
Key 8 / 9Select bit 0–7 option
UP/DOWNChannel Up / Channel Down
Volume +Increment of selected item
Volume –Decrement of selected item
OKStore / saves selected item
NormalExit the service mode
SERVICE MODE 1
ITEM
H-POS
V-POS
H-AMP
V-AMP
DVCO
R High
B High
R Low
B Low
SubBrightness
Key 3 / 4Previous / next item
UP/DOWNChannel Up / Channel Down
Volume +Increment of selected item
Volume –Decrement of selected item
OKStore / saves selected item
NormalExit the service mode
Note: Always, finishing the adjustments, press the “NORMAL” key or the “POWER” key in the remote control to leave