Please add this notice to the Service Manual listed below.
REVISION 13
Category :
U.S.A. / CANADA
Destination:
February / 15 / 2005
Date:
27930-13
Effective from : Chassis No.
SM780086-08
REF : No.
NOTE: Match the Chassis No. on the unit’s back cover with the Chassis No. in the Service
Manual. If the Service Manual Chassis No. does not match the unit’s, additional Service
Literature is required. This chassis is similar to Chassis No. 27930-08. Only the
difference Service Information is given in this manual. For detailed Service Information,
refer to the Original Service Manual and Notices for Chassis No. 27930-08 used in Model
DS27930 (SM780086-08).
1. IN THE CHASSIS ELECTRICAL PARTS LIST (MAIN PWB ASSY)
The reason for change.
A: MisprintB : Quality ReliabilityC : Standardization
D : DesignE : Add as a possible subF : Schematic location change
G : Purchasing Request
Please add this notice to the Service Manual listed below.
REVISION 12
Category :
U.S.A. / CANADA
Destination:
February / 15 / 2005
Date:
27930-12
Effective from : Chassis No.
SM780086-08
REF : No.
NOTE: Match the Chassis No. on the unit’s back cover with the Chassis No. in the Service
Manual. If the Service Manual Chassis No. does not match the unit’s, additional Service
Literature is required. This chassis is similar to Chassis No. 27930-08. Only the
difference Service Information is given in this manual. For detailed Service Information,
refer to the Original Service Manual and Notices for Chassis No. 27930-08 used in Model
DS27930 (SM780086-08).
1. IN THE CHASSIS ELECTRICAL PARTS LIST (MAIN PWB ASSY)
The reason for change.
A: MisprintB : Quality ReliabilityC : Standardization
D : DesignE : Add as a possible subF : Schematic location change
G : Purchasing Request
Please add this notice to the Service Manual listed below.
Category :
Model:
Destination:
COLOR TELEVISION
DS27930
U.S.A. / CANADA
PRODUCTION CHANGE
ADD INFORMATION
REF : No.
SM780086-08
FILE NO.
REVISION 11
Date:
Effective from : Chassis No.
February / 15 / 2005
27930-11
NOTE: Match the Chassis No. on the unit’s back cover with the Chassis No. in the Service
Manual.
If the Service Manual Chassis No. does not match the unit’s, additional Service
Literature is required. This chassis is similar to Chassis No. 27930-08. Only the
difference Service Information is given in this manual. For detailed Service Information,
refer to the
Original Service Manual and Notices for Chassis No. 27930-08 used in Model
DS27930 (SM780086-08).
1. IN THE CHASSIS ELECTRICAL PARTS LIST (MAIN PWB ASSY)
The reason for change.
A : MisprintB : Quality ReliabilityC : Standardization
D : DesignE : Add as a possible subF : Schematic location change
G : Purchasing Request
Please add this notice to the Service Manual listed below.
REVISION 10
Category :
U.S.A. / CANADA
Destination:
January / 15 / 2005
Date:
27930-10
Effective from : Chassis No.
SM780086
REF : No.
NOTE: Match the Chassis No. on the unit’s back cover with the Chassis No. in the Service
Manual. If the Service Manual Chassis No. does not match the unit’s, additional Service
Literature is required. This chassis is similar to Chassis No. 27930-08. Only the
difference Service Information is given in this manual. For detailed Service Information,
refer to the Original Service Manual and Notices for Chassis No. 27930-08 used in Model
DS27930 (SM780086-08).
1. IN THE CHASSIS ELECTRICAL PARTS LIST
The reason for change.
A : MisprintB : Quality ReliabilityC : Standardization
D : DesignE : Add as a possible subF : Schematic location change
G : Purchasing Request
Please add this notice to the Service Manual listed below.
REVISION 9
Category :
U.S.A. / CANADA
Destination:
January / 15 / 2005
Date:
27930-09
Effective from : Chassis No.
SM780086
REF : No.
NOTE: Match the Chassis No. on the unit’s back cover with the Chassis No. in the Service
Manual. If the Service Manual Chassis No. does not match the unit’s, additional Service
Literature is required. This chassis is similar to Chassis No. 27930-08. Only the
difference Service Information is given in this manual. For detailed Service Information,
refer to the Original Service Manual and Notices for Chassis No. 27930-08 used in Model
DS27930 (SM780086-08).
1. IN THE CHASSIS ELECTRICAL PARTS LIST
The reason for change.
A : MisprintB : Quality ReliabilityC : Standardization
D : DesignE : Add as a possible subF : Schematic location change
G : Purchasing Request
Please add this notice to the Service Manual listed below.
REVISION 8
Category :
U.S.A. / CANADA
Destination:
January / 15 / 2005
Date:
27930-08
Effective from : Chassis No.
SM780086
REF : No.
NOTE: Match the Chassis No. on the unit’s back cover with the Chassis No. in the Service Manual.
If the Service Manual Chassis No. does not match the unit’ s, additional Service Literature is
required. This chassis is similar to Chassis No. 27930-00, however, all Service
Information is given in this Notice for Chassis No. 27930-08 used in Model DS27930.
— 2 —
SAFETY PRECAUTIONS
WARNING: The chassis of this receiver has a floating
ground with the potential of one half the AC line voltage in
respect to earth ground. Service should not be attempted by
anyone not familiar with the precautions necessary when
working on this type of equipment.
The following precautions must be observed:
1. An isolation transformer must be connected in the power
line between the receiver and the AC line before any service is performed on the receiver.
2. Comply with all caution and safety-related notes provided on the side of the cabinet, inside the cabinet, on the
chassis, and the picture tube.
3. When replacing a chassis in the cabinet, always be certain
that all the protective devices are installed properly, such
as control knobs, adjustment covers, shields and barriers.
DO NOT OPERATE THIS TELEVISION RECEIVER
WITHOUT THE PROTECTIVE SHIELD IN POSITION AND
PROPERLY SECURED.
4. Before replacing the back cover of the set, thoroughly
inspect the inside of the cabinet to see that no stray parts
or tools have been left inside.
Before returning any television to the customer, the
service technician must perform the following safety
checks to be sure that the unit is completely safe to
operate without danger of electrical shock.
ANTENNA COLD CHECK
Remove AC plug from the 120 VAC outlet and place a
jumper across the two blades. Connect one lead of an ohmmeter to the jumpered AC plug, and touch the other lead to
each exposed antenna terminal (UHF and VHF antenna terminals). The resistance must measure between 1M ohm and
5.2M ohm. Any resistance value below or above this range
indicates an abnormality which requires corrective action.
LEAKAGE CURRENT CHECK
Plug the AC line cord directly into a 120 VAC outlet. (Do not
use an isolation transformer for this check.) Use an AC voltmeter, that has 5000 ohms per volt or more sensitivity.
Connect a 1500 ohm 10 watt resistor, paralleled by a 0.15 µF
150 VAC capacitor, between a known good earth ground
(water pipe, conduit, etc.) and all exposed metal parts of the
cabinet (antennas, handle bracket, metal cabinet, screw
heads, metal overlays, control shafts, etc.). Measure the AC
voltage across the 1500 ohm resistor. The AC voltage
should not exceed 750 mV. A reading exceeding 750 mV
indicates that a dangerous potential exists. The fault must
be located and corrected. Repeat the above test with the
receiver power plug reversed.
NEVER RETURN A RECEIVER TO THE CUSTOMER
WITHOUT TAKING THE NECESSARY CORRECTIVE ACTION.
X-RADIATION PRECAUTION
The primary source of X-RADIATION in solid-state receivers is
the picture tube. The picture tube is specially constructed to
limit X-Ray emission. For continued X-RADIATION protection,
the replacement tube must be the same type as the original
(including the suffix letter in the part numbers). Excessive high
voltage may produce potentially hazardous X-RADIATION. To
avoid such hazards, the high voltage must be maintained within
specific limits. Refer to the X-RADIATION WARNING NOTE on
the CHASSIS SCHEMATIC in this service manual for specific
high voltage limits. If the high voltage exceeds specified limits,
check the components specified on the chassis schematic
diagram and take the necessary corrective action. Carefully
follow the instructions for the +B Voltage Check and the High
Voltage Check to maintain the high voltage within the specified
limits.
HIGH VOLTAGE HOLD-DOWN TEST
To prevent X-RADIATION from the picture tube due to
excessive high voltage, a HOLD-DOWN circuit is provided in
the high voltage circuit. Every time the receiver is serviced,
the high voltage HOLD-DOWN circuit must be tested for
proper operation. Refer to the HIGH VOLTAGE HOLDDOWN TEST in service adjustments.
PRODUCT SAFETY NOTICE
When replacing components in a receiver, always keep in
mind the necessary product safety precautions. Pay special
attention to the replacement of components marked with a
star (★) in the parts list and in the schematic diagrams. To
ensure safe product operation, it is necessary to replace
those components with the exact same PARTS.
SAFETY INSTRUCTIONS
READING SHOULD NOT EXCEED 750 mV.
AC VOLTMETER
(5000 ohms per volt or more sensitivity)
TELEVISION
RECEIVER
Good earth ground
such as a water pipe,
conduit, etc.
AC OUTLET
1500 ohm
10 watt
0.15 F 150V AC
To be touched to all of exposed metal parts.
Voltmeter Hook-up for Leakage Current Check.
GENERAL
This set has an on-screen Service Menu system included in the CPU that allows remote operation for most of the service adjustments.
To enter the Service Menu, first disconnect the AC power cord. Then while pressing the MENU key on the front control panel, reconnect the AC power cord. The adjustments can now be made with the remote control or front control panel keys.
ON-SCREEN SERVICE MENU SYSTEM
1. Enter the Service Menu:
•While pressing the MENU key on the front control panel, reconnect the AC
power cord. The Service Menu Display will now appear. See Figure 1.
2. Service Adjustments:
•Press the ▲ or ▼ key to select the desired service menu item you
want to adjust. (See page 5 for On-screen Service Menu.)
•Use the + or – key or number keys to adjust the data.
The + or – keys will increase or decrease the data sequentially.
The number keys (0 ~ 7) toggle only their respective bits between
1 and 0 and are used to change the Sub-Address. For example to
change bit 5 press the number 5 key. See below.
3. Exit from the Service Menu:
•Press the MENU key to turn off the Service Menu display.
SERVICE ADJUSTMENTS
— 3 —
IC802 (EEPROM) REPLACEMENT
When IC802 (EEPROM) is replaced, IC801 (CPU) will automatically write the initial reference data into IC802 for basic TV operation.
However, the bus data should be checked and some bus data should be set up before attempting the service adjustments.
(See pages 5 – 7, Table 1, for detailed bus data information.)
INITIAL BUS DATA SETUP
Note: When IC802 (EEPROM) is replaced, change the following initial reference data for proper TV operation before
attempting service adjustments.
1. Disconnect the AC power cord (AC 120V line).
2. While pressing the MENU key, reconnect the AC power cord. The Service Menu display will now appear.
3. Select NO. 3C SCO (Sub Color) with ▲ or ▼ key. Adjust the data with + or – key for 1A.
4. Select NO. 3D STI (Sub Tint) with ▲ or ▼ key. Adjust the data with + or – key for 0D.
5. Select NO. 3F SSH (Sub Sharpness) with ▲ or ▼ key. Adjust the data with + or – key for 02.
6. Select NO. 40 AFC6HFR (AFC / H Frequency) with ▲ or ▼ key. Adjust the data with number keys for BF.
7. Select NO. 42 VS (V Size) with ▲ or ▼ key. Adjust the data with + or – key for 2B.
8. Select NO. 43 VSP7VPO (V Sync Sep / V Position) with ▲ or ▼ key. Adjust the data with number keys for 20.
9. Select NO. 44 CDM5UVL (V Count Dn Mode / V Lin Top) with ▲ or ▼ key. Adjust the data with number keys for 0F.
10. Select NO. 45 VC5LVL (V Compresion / V Lin Bottom) with ▲ or ▼ key. Adjust the data with number keys for 4D.
11. Select NO. 46 VSC (V S Correction) with ▲ or ▼ key. Adjust the data with + or – key for 10.
12. Select NO. 4A RD (Red Drive) with ▲ or ▼ key. Adjust the data with + or – key for 3A.
13. Select NO. 4C BD (Blue Drive) with ▲ or ▼ key. Adjust the data with + or – key for 3A.
14. Select NO. 4D SBI (Sub Bias) with ▲ or ▼ key. Adjust the data with + or – key for 40.
15. Select NO. 54 FLS (Y/C Filter Mode) with ▲ or ▼ key. Adjust the data with + or – key for 83.
16. Select NO. 57 YGM6DCR4BSS2BSG (Y Gamma / DC Reset / Black Steak Start / Black Streak Gain) with ▲ or ▼ key.
Adjust the data with number keys for A1.
SCO
3C 1A 00011010
Figure 1. Service Menu Display
ITEM NO.
TITLE
BINARY DATA
(8 bit)
HEX DATA
(b7) (b6) (b5) (b4) (b3) (b2) (b1) (b0)
0 1 0 1 0 1 1 0
BINARY DATA
(8 bit)
INITIAL BUS DATA SETUP (Cont.)
17. Select NO. 58 AFC7CBP5 (Auto Flesh / C Band Pass Filter) with ▲ or ▼ key. Adjust the data with number keys for C0.
18. Select NO. 59 DIG6ABL5MSD4BAT (OSD D/A / ABL Defeat / Mid Stop / ABL Threshold) with ▲ or ▼key. Adjust the data
with numbers key for 64.
19. Select NO. 5A RYA (R-Y/B-Y Angle) with ▲ or ▼ key. Adjust the data with + or – key for 00.
20. Select NO. 5F VL5BPF (Video Level / S BPF Sw) with ▲ or ▼ key. Adjust the data with number keys for 80.
21. Select NO. 60 EWD (E/W DC) with ▲ or ▼ key. Adjust the data with + or – key for 26.
22. Select NO. 61 EWA (E/W Amp) with ▲ or ▼ key. Adjust the data with + or – key for 0F.
23. Select NO. 62 EWT (E/W Tilt) with ▲ or ▼ key. Adjust the data with + or – key for 23.
24. Select NO. 63 EWB4EWP (E/W Corner Btm / E/W Corner Top) with ▲ or ▼ key. Adjust the data with number keys for 96.
25. Select NO. 65 BOW4ANG (Bow Correct / Angle Correct) with ▲ or ▼ key. Adjust the data with number keys for 96.
26. Select NO. 66 PRE6OVR4CTT (Pre Shoot Adj / Over Shoot Adj / Chroma Trap Test) with ▲ or ▼ key. Adjust the data
with number keys for 20.
27. Select NO. 67 HBL4HBR (H Blanking L / H Blanking R) with ▲ or ▼ key. Adjust the data with number keys for 2A.
28. Select NO. 68 SSP5VM (Sync Sep Sens / VM Gain) with ▲ or ▼ key. Adjust the data with number keys for 8C.
29. Select NO. 6A YTH2YGA (Y TH / Y Gain) with ▲ or ▼ key. Adjust the data with number keys for 0D.
30. Select NO. 6B RWD6ROF4BWD2BOF (R Width / R Offset / B Width / B Offset) with ▲ or ▼ key. Adjust the data with
number keys for 10.
31. Select NO. 83 OPT (Asp Ratio / Comb F / Clock / Scan Veloc) with ▲ or ▼ key. Adjust the data with number keys for 38.
32. Select NO. 84 OP2 (V Guide / Tone / AV / PIP / F/V / I-Ch / C En / C En Select) with ▲ or ▼ key. Adjust the data with
number keys for 26.
33. Select NO. 8D HR (H Display Position) with ▲ or ▼ key. Adjust the data with + or – key for 18.
34. Select NO. 8E SBO (Sub Bright Offset) with ▲ or ▼ key. Adjust the data with + or – key for 02.
35. Select NO. 92 DTN (YUV Sub Tint) with ▲ or ▼ key. Adjust the data with + or – key for FC.
36. Select NO. 96 BDC (YUV Cb Offset) with ▲ or ▼ key. Adjust the data with + or – key for 00.
37. Select NO. 97 RDC (YUV Cr Offset) with ▲ or ▼ key. Adjust the data with + or – key for 00.
38. Select NO. 9A ECN (16:9 Sub Contrast) with ▲ or ▼ key. Adjust the data with + or – key for E9.
39. Select NO. 9B EBR (16:9 Sub Bright) with ▲ or ▼ key. Adjust the data with + or – key for FB.
40. Select NO. A0 EEA(16:9 Sub E/W Amp) with ▲ or ▼ key. Adjust the data with + or – key for F9.
41. Select NO. A1 EET (16:9 Sub E/W Tilt) with ▲ or ▼ key. Adjust the data with + or – key for 00.
42. Select NO. A2 EEP (16:9 Sub E/W Corner Top) with ▲ or ▼ key. Adjust the data with + or – key for FF.
43. Select NO. A3 EEB (16:9 Sub E/W Corner Bottom) with ▲ or ▼ key. Adjust the data with + or – key for FD.
44. Select NO. A4 EUV (16:9 Sub V Lin Top) with ▲ or ▼ key. Adjust the data with + or – key for FE.
45. Select NO. A5 ELV (16:9 Sub V Lin Bottom) with ▲ or ▼ key. Adjust the data with + or – key for 04.
46. Select NO. AB VFL (Filter System AVt) with ▲ or ▼ key. Adjust the data with + or – key for 04.
47. Press the MENU key to turn off the Service Menu display.
— 4 —
SERVICE ADJUSTMENTS (Cont.)
— 5 —
Table 1. ON-SCREEN SERVICE MENU
When IC802 (EEPROM) is replaced, check the bus data to confirm they are the same as below. The shaded menu should be
checked and be set up or readjusted according to the procedures described in the following pages. Initial Setup Data marked
with an * should be changed from Initial Reference Data. See pages 3 and 4 for Initial Bus Data Setup.
No.TITLE
INITIAL REFERENCEINITIAL SETUPINITIAL SETUP
FUNCTION
DATA HEXDATA HEXDATA BINARY
3CSCO0F1A*00011010Sub Color
3DSTI150D*00001101Sub Tint
3ESB202000100000Sub Bright
3FSSH0802*00000010Sub Sharpness
40AFC6HFRA5BF*10111111AFC(6) Horizontal Frequency
41VTR7HP0C0C00001100Vertical Trans(7) Horizontal Phase
42VS402B*00101011Vertical Size
43VSP7VPO2A20*00100000Vertical Sync Separator(7) Vertical Position
44CDM5UVL060F*00001111Vetical Count Down Mode(5) Vertical Linearity Top
45VC5LVL9E4D*01001101Vertical Compression(5) Vertical Linearity Bottom
46VSC1410*00010000Vertical S Correction
47RB000000000000Red Bias
48GB000000000000Green Bias
49BB000000000000Blue Bias
4ARD383A*00111010Red Drive
4BHT5HTD4GD373700110111Half Tone(6~5) Half Tone Defeat(4) Green Drive
4CBD383A*00111010Blue Drive
4DSBI3040*01000000Sub Bias
4E↓↓↓↓Not Used
4F↓↓↓↓Not Used
50OSD070700000111On Screen Display Contrast
51CRG6808010000000Coring
52↓↓↓↓Not Used
53↓↓↓↓Not Used
54FLS8483*10000011Y/C Filter Mode
55GRY7CRS5GYA3CKO030300000011Gray(7) Cross B/W(6~5) G-Y Angle(4) Color Killer
56FBP6YAP4WP424201000010FBP Blanking(6) Y APF(4) White Peak
57YGM8DCR4BSS2BSGA5A1*10100001Y Gamma(7~6) DC Reset(5~4) B Strk Start(3~2)B Strk Gain
58AFC7CBP540C0*11000000Auto Flesh(7) Color Band Pass Filter(5)
59DIG6ABL5MSD4BAT4464*01100100OSD D/A(6) ABL Defeat(5) Mid Stop(4) ABL Threshold
5ARYA0B00*00000010R-Y/B-Y Angle
5BCBO4CRO888810001000Cb DC Offset(7~4) Cr DC Offset
5C↓↓↓↓Not Used
5DSTS7RAD202000100000S Trap Switch(7) RF AGC Delay
5EFMM7VIF4IAS000000000000FM Mute(7) VIF System Switch(4) IF AGC
5FVL5BPFA080*10000000Video Level(7~5) S BPF Switch
60EWD2826*00100110E/W DC
61EWA170F*00001111E/W Amp
62EWT1D23*00100011E/W Tilt
63EWB4EWP8896*10010110E/W Corner Bottom(7~4) E/W corner Top
64EWC7HLV6HSC030300000011E/W Correction Sw(7) H Lock V Det(6) H Size Comp
66PRE6OVR4CTTC020*00100000Preshoot Adj(7~6) Overshoot Adj(5~4) Chroma Trap Test
67HBL4HBR382A*00101010H Blanking Left(7~4) H Blanking Right
68SSP5VM908C*10001100Sync Sep Sens(7~5) VM Gain
69VBL4000000000000V Size 0.75(7) V Blanking select
6AYTH2YGA000D*00001101Y TH(3~2) Y Gain
6BRWD6ROF4BWD2BOF0010*00010000R Width(7~6) R Offset(5~4) B Width(3~2) B Offset
80ATT070700000111Attenuation (MTS Input Level)
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