Before servicing this chassis, it is important that the service person read the "SAFETY PRECAUTIONS" and
"PRODUCT SAFETY NOTICE" contained in this manual.
PCB LA YOUT DIAGRAMS ............................................................................................................... 15
Page 4
Page 4
MODELS: HD-5000 / HD-5000A
INTRODUCTION
This service manual provides service instructions for the V21S STB chassis type. The specific models for each
chassis type are listed below. Service personnel should read this manual thoroughly before servicing these chassis.
V21S Ch a ssis
HD-5000
HD-5000A
This service manual includes:
1. Saftey Precautions
2. Assembly and disassembly instructions.
3. Servicing printed circuit boards (PCBs).
4. Electrical adjustments.
5. Chip parts replacement procedures.
6. Circuit path diagrams.
The parts list section of this service manual includes:
1. Mechanical and Cosmetic parts.
2. Electrical parts.
Schematic and block diagrams of the above listed models are included in this service manual for better understanding of the circuitry. PCB drawings are also included for easy location of parts and test points.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in television receivers 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 special safety characteristics are identified in this service manual.
Electrical components having such features are identified by shading on the schematic diagram and by bold
type in the parts list of this service manual. The replacement for any safety part should be identical in value
and characteristics.
Page 5
Page 5
MODELS: HD-5000 / HD-5000A
SAFETY PRECAUTIONS
NOTICE:Observe all cautions and safety related notes located inside the receiver cabinet and on the
receiver chassis.
WARNING:
1.Operation of this receiver outside the cabinet or with the cover removed presents a shock hazard
from the receiver's power supplies. Work on the receiver should not be attempted by anyone who is
not thoroughly familiar with the precautions necessary when working on high voltage equipment.
2.When service is required, observe the original lead dress. Extra precaution should be taken to
assure correct lead dress in the high voltage area. Where a short-circuit has occurred, replace those
components that indicate evidence of overheating.
Leakage current check
Before returning the receiver to the customer, it is recommended that leakage current be measured according to
the following methods.
1. Cold Check
With the alternating current (AC) plug removed from the AC source, place a jumper across the two AC plug
prongs. Connect one lead of an ohm meter to the AC plug and touch the other lead to each exposed metal
part (i.e. antennas, handle bracket, metal cabinet, screw heads, metal overlay, control shafts, etc.), particularly any exposed metal part that has a return path to the chassis. The resistance of the exposed metal parts
having a return path to the chassis should be a minimum of 1Mega Ohm. Any resistance below this value
indicates an abnormal condition and requires corrective action.
2. Hot Check ...Use the circuit shown below to perform the hot check test.
1. Keep switch S1 open and connect the receiver to the measuring circuit. Immediately after
connection, and with the switching devices of the receiver in their operating positions, measure
the leakage current for both positions of switch S2.
2. Close switch S1, energizing the receiver. Immediately after closing switch S1, and with the
switching devices of the receiver in their operating positions, measure the leakage current for both
positions of switch S2. Repeat the current measurements of items 1 and 2 after the receiver has
reached thermal stabilization. The leakage current must not exceed 0.5 milliampere (mA).
GWG - Green Wire Ground
(Earth Ground)
Page 6
Page 6
MODELS: HD-5000 / HD-5000A
TOP COVER ASSEMBLY/DISASSEMBLY
1) Remove 3 SCREWS
2) Remove 4 SCREWS
2HDW PWB
POWER PWB
under 2hdw pwb
TOP COVER
2
2
SIGNAL PWB
DM PWB
under signal pwb
2HDW REMOV AL
REMOVE TOP
COVER
REMOVE 2HDW
PWB
1
PWB ASSEMBLY/DISASSEMBLY
(See detailed drawings on next 3 pages)
SIGNAL REMOV AL
REMOVE TOP
COVER
FOLLOW STEP #1
AND #2 TO REMOVE
SIGNAL PWB
TERMINAL REMOV AL
REMOVE TOP
COVER
REMOVE SIGNAL
PWB
REMOVE
TERMINAL PWB
POWER PWB
REMOVE 2HDW
REMOVE POWER
TERMINAL 1&2 PWB
REMOVE TOP
COVER
PWB
PWB
DM PWB
REMOVE TOP
COVER
REMOVE SIGNAL
PWB
REMOVE
TERMINAL PWB
SEPARATE
TERMINAL 1 AND
TERMINAL 2
PAGE 7
REMOVE DM PWB
Page 7
MODELS: HD-5000 / HD-5000A
2HDW ASSEMBLY
1) Remove 3 connectors (EA, EB, EC) from Signal PWB
2) Remove 4 SCREWS from 2HDW PCB
SHIELD PLA TE
2HDW PWB
SHIELD CASE
EB
EC
EA
SIGNAL PWB ASSEMBY STEP 1
1) Remove 15 connectors (EA, EB,
EC, KE, KC, KB, CD, CA, VA,
DA, DV, VB, PE, PD, RF)
EA
EB
EC
SIGNAL PWB
RF
SIGNAL PWB ASSEMBY STEP 2
1) Remove 4 connectors (SU, ST , SS, SR)
2) Remove 6 SCREWS
3) Remove RF PLA TE
RF PLA TE
SU
ST
SS
SIGNAL PWB
SR
TERMINAL 1&2 PWB ASSEMBY
1) Remove 23 SCREWS (not shown)
2) Remove 4 HEX LOCK (H1~H4) screws
19
H3/H4
20
21
4
1
5
2
6
3
H1/H2
PWB SP ACER
7
10
15
11
8
12
13
9
18
16
17
14
23
22
PAGE 8
TERMINAL 1 PWB
TERMINAL 2 PWB
Page 8
MODELS: HD-5000 / HD-5000A
POWER PWB ASSEMBY
1) Remove 6 SCREWS from Power
PCB
1) Remove 2 connectors (GS, PS)
PE
PD
DM PWB ASSEMBY
1) Remove 5 SCREWS from DM
PCB
2) Remove 2 HEX LOCK SCREWS
3) Remove DTV W ASHER
3) Remove 7 connectors (DV, DA,DB, VA, VB, PD, PE)
FRONT PWB ASSEMBY
1) Remove 4 SCREWS from bottom
2) Remove 4 SCREWS from top
3) Remove 1 connectors (RF)
4) Remove 4 SCREWS from FRONT PWB
POWER PWB
DA
VB
DV
DB
VA
DM PWB
DTV W ASHER
2
FRONT PWB
1
PAGE 9
Page 9
MODELS: HD-5000 / HD-5000A
CABINET ASSEMBLY
AC INLET / F AN ASSEMBL Y
1) Remove AC INLET from rear panel
2) Remove F AN MOTOR from fan holder
AC INLET
AC INLET
F AN MOTOR
MAIN CHASSIS ASSEMBLY
1) Remove 4 SCREWS from bottom feet
2) Remove 3 SCREWS from rear panel bottom
3) Remove 2 SCREWS from cover shield bottom
1
1
3
F AN HOLDER
LEAD CLAMPER
COVER SHIELD
MAIN CHASSIS
2
REAR P ANEL
PAGE 10
Page 10
MODELS: HD-5000 / HD-5000A
4
ELECTRICAL ADJUSTMENTS
Note: Perform only the adjustments required.
Do not attempt an alignment if proper equipment is not available.
Test Equipment
•Oscilloscope (Unless otherwise specified, use 10:1 probes)
•Signal Generator (both SD and HD capable)
•Frequency Counter
•Direct Current Voltmeter
•Direct Current Power Supply
•Multiplex Audio Signal Generator
•Direct Current Ampere Meter
Test Signal
A. Monoscope Signal
Note: If you do not have
a monoscope signal source,
connect the unit to a VCR
and play a *Monoscope
alignment tape.
(* Part Number: 859C568060)
B. Color Bar Signal
Use the color bar signal shown
below, unless otherwise specified
in this manual.
100%
75%
0%
40%
1H
Monoscope Signal
Split-Field Color Bars (100% window)
Page 11
Page 11
MODELS: HD-5000 / HD-5000A
Initial Setup
A. Option Menu Setup
Follow the steps below for the initial set-up:
1.Move switch to ‘Cable/DBS/DTV’ layer
2.Select the "MENU" display by pressing the "MENU" button once.
3.Press the number buttons "0", "3", "7", "0" in sequence to select
the "OPTION MENU" display.
4.Press the "ADJUST" button to select "INITIAL."
5.Press "ENTER."
NOTE: At this time channel 3 is automatically selected.
B.Default Settings
SETUPCAPTI ONSAUD IO S ETT I NG S
Edit S et u p
ReviewCC Bac kgroundGrayBas s50%
Ant enna A() EnabledDigital Channel GuideOff Treble50%
Ant enna B() EnabledBalanc eCenter
Ant enna DTV() EnabledV-CHIPOff SurroundOff
Input 1() EnabledTV RatingTV-PGListen toSt ereo
Input 2() EnabledFV-Fant as y V iol enc e() EnabledLevel S oundO n
Input 3() EnabledD-Sexual Di alog() Enabled
Input 4() EnabledL-Adult Language() EnabledContrast50%
Component 1() EnabledS-Sex ual S i tuat ion() EnabledBrightnes s50%
Component 2() EnabledV-Violence() EnabledSharpness50%
Input DTV() EnabledProgram not Rat ed() EnabledColor50%
VGA() EnabledMovie Rati ngPGTintCenter
Icon Posi tion
Transport Menu
Lang uage
ANTENNA
Ant ennaANT AUnlock TimeN/AA udio Out to Dis playOn
Mem oriz e ChannelsAirLock TimeN/A
ChannelCh-3
Mem oryDeletedTim erOff S ourc eA nt A C h 3
CLOCK
Clock S et tingManualSet Time12:00P MPO P Pos it ionRight Half
Set Time12:00 AMDevic eAnt -AFormatSt retc hed
Set DaySundayChannelCh-3 P IP/ P O P Form atDble. Window
As above V -Chip St art Time12: 00 P MFilm Mode (A ut o)On
OnV-Chip St op Time12:00 P MV CR Com pens at ionSt andard
Engli s hVideo M uteOn
MAI N M ENU DEFAULT S ETT I NGS
Closed Capt ionsWit h M uteVolum e30%
V-CHI P P ARENT LO CK
V-CHI P L O CK BY TI M E
Lock By T i m e
Lock by TimeOff Blac k EnhancementOn
TIMER
Set DayEvery dayP IP Pos it ionLower Right
Video Nois eSt andard
A/V RESET DEFAULT SETTI NGS (By Input)
A/V M em oryAnt A/BAnt D T VInp-DTV
INPUTS
1/2/3/4
Component
ContrastCenterCenterCenterCenterCenterCenterCenter
BrightnessCenterCenterCenterCenterCenterCenterCenter
SharpnessCenterCenterCenterCenterCenterN/ACenter
ColorCenterCenterCenterCenterCenterCenterCenter
TintCenterCenterCenterCenterCenterCenterCenter
Vi deo Nois eS t andardN/AS t andardS t andardS tandardN/AN/ A
Film Mode(auto)
VCR C ompensat ion
OnN/AOnOnOnN/AN/A
StandardN/AStandardStandardStandardN/AN/A
Image TypeVideoN/AVid eoV id eoVi deoN/AN/ A
BassCenterCenterCenterCenterCenterCenterCenter
Tr ebleCenterCenterCenterCenterCenterCenterCenter
BalanceCenterCenterCenterCenterCenterCenterCenter
SurroundOFFOFFOFFOFFOFFOFFOFF
Lis t en ToStereoE ngl ishN/AN/ AN/AN/ AN/ A
Page 12
(MENU-0-3-7-0)
OPTION MENU
Initial
P ow er re sto re:O F F
DTV Port:A uto
VIDEO SETTINGS
PIP/POP
1/2
VGA1394
Page 12
MODELS: HD-5000 / HD-5000A
C. A/V Memory
Each of the external inputs has its’ own Audio/Video Memory. A change in an A/V setting at a specific input is
stored in memory for that specific input.
A/V Reset
1. The front panel AV Reset button initializes all A/V Memories.
2. The AV Reset in the user’s menu initializes only the selected input’s A/V Memory.
LED Indicator Diagnostics
The “Power ON LED” provides an indication of the sets operation, and the possible cause of a malfunction.
1. Initial Control Circuitry Check
Immediately after the TV is connected to an AC power source:
LED Indications ConditionsProbable Cause
OffAfter AC is applied Standy P ower Suppl y or T V µP C not running
Fast Blink for 70 sec.A fter AC is appli ed Normal - DM µPC is booti ng up
Fast Bli nk ( doesn't stop)After A C is applied TV µPC is running, but DM failed to boot up
Slow BlinkSet is OffNormal - Timer is set for Automatic Turn ON
2. Error Code Operational Check
Pressing the front panel “INPUT” and “MENU” buttons at the same time, and holding for 5 seconds,
activates the Error Code Mode. The LEDs flashes denoting a two digit Error Code, or indicating no problem
has occured since the last Initalization.
Note: The front panel buttons must be used, NOT those on the Remote Control.
• The number of flashes indicates the value of the MSD (tens digit) of the Error Code.
• The flashing then pauses for approximately 1/2 second.
• The LEDs then flash indicating the value of the LSD (ones digit) of the Error Code.
• The Error Code is repeated a total of 5 times.
Example: If the Error Code is “24”, the LEDs will flash two times, pause, and then flash four
times.
3. Error Codes
The Error Code designations indicating a malfunction, or no malfunction, are listed below:
Error CodeProbable Cause
12Normal Operation - No Error Detected
35Fan Stop
Remote Control Operational Modes
There are two Remote Hand Unit Operational Modes, “Standard” and “NetCommandTM”. The Remote is initially in
the “Standard” mode. The “NetCommandTM” mode is used when controlling Home Theater devices using
NetCommandTM. T o change the Remote Operational Mode:
• Set the Remote to the CABLE/DBS/DTV Layer
• Point the Remote away from the Set Top Box.
• T o change to “Netcommand
TM
” ... Hold the “Power” button and press “1-9-7” in sequence.
• T o change to “S tandard” ... Hold the “Power” button and press “0-0-0” in sequence.
Page 13
Page 13
MODELS: HD-5000 / HD-5000A
V
Circuit Adjustment Mode
Most of the adjustments can only be performed using the remote hand unit. Many of the adjustments must be
performed in both the 480i and 1080i modes. Video/Color adjustments must be performed in the 480i and
1080i modes, and data must be preset in the 480P (DVD) and VGA modes.
Note: Set the Remote Operational Mode to “NetCommandTM”. (Hold the “Power” button and press
“1-9-7” in sequence.) This slows the remote’s response and makes adjustments easier . When
adjustments are complete, set the Remote to its’ original Operational Mode.
A. Activating the Circuit Adjustment Mode
The current signal source determines if the
activated Adjustment Mode is 480i or 1080i.
1.Select the signal source (480i or 1080i).
2.Select ‘ Cable/DBS/DTV’ remote layer.
3.Press the "MENU" button on a remote hand unit.
4.Press the number buttons "0", "3", "5", "7" in sequence. The screen will
change to the Adjustment Mode.
Note: Repeat steps 1 and 2 if the circuit
adjustment mode does not appear
on screen.
CHAS SIS
MODE
ADJ ITEM
V21S
0
1SC T42480i
ABBREV.DATA
SIGNAL
B. Selection of adjustment Functions and
Adjustment Items
To select an adjustment item in the circuit adjustment mode, first select the adjustment function that includes
the specific adjustment item to be selected. Then select the adjustment item. Refer to the following pages for
the listing of adjustment functions and adjustment items.
1.Press the "AUDIO" button on a remote hand unit to select an adjustment function. Each time the button
is pressed, the Function changes in the following sequence:
CJNGLMNTS
Adjustment Functions
VIDEO ADC
2.Press the “VIDEO” button to select a specific Adjustment Item. The Item number increases each time the
“VIDEO” button is pressed.
AUDSNTS
C. Changing Data
After selecting an adjustment Item, use the “ADJUST UP/DOWN” buttons to change data.
•Press “ADJUST DOWN” to decrease the data value.
•Press “ADJUST UP” to increase the data value.
D. Saving Adjustment Data
Press “ENTER” to save adjustment data in memory . The character display turns red for approximately one
second in this step.
Note: If the circuit adjustment mode is terminated without pressing “ENTER”, changes in adjustment data
are not saved.
Page 14
Page 14
MODELS: HD-5000 / HD-5000A
V
VGA
E. Terminating the Circuit Adjustment Mode
Press the “MENU” button on the remote hand unit twice to terminate the adjustment mode.
Note: The circuit adjustment mode can also be terminated by turning power OFF.
F. Toggle Between Reception Modes
Pressing “3” when in the Adjustment Mode VC Function toggles between 480i, 480p, 1080i and VGA.
However data changes are not automatically saved. Press “ENTER” to save data before pressing “3”.
On Screen Display Position Adjustment Mode
Activation
1.Select 480i or 1080i (DTV INPUT) source.
2.Press MENU-0-3-9-9
Data Transfer Mode
Activation
1.Pressing the “0” key when in the open alignment mode will access a special function table. The table
will be displayed at the top of the screen and below is description of the special functions available.
Key Sequence
NameDescription
Transfers console alignment data (MNTS;SNTS;AUD)
1 2XFER Console Data
stored on the Signal EEPROM to the DM E EPR O M .
Used when replacing a bad DM.
Transfers white balance alignment data (VC) stored on
1 3XFER White Balance Data
the Signal EEPROM to the DM EEPR O M . Used when
replacing a bad DM .
Runs a check to confirm if a valid HAVI certificate has
1 4Net check
been loaded. Status message will appear after pressing
the key sequence.
Transfers the alignment data stored in the DM EEPROM
1 6Copy DM data to sig n al EEPRO M
to the signal EEPROM .
Transfers the alignment data stored in the signal
1 7Copy signal data to DM
Note 1: After pressing the key sequence shown above, the special function table will disappear . The “0” key must be
pressed again to bring up the special function table.
EE P ROM to th e DM EEPROM .
E2PROM Replacement
IC7A01 stores some adjustment data. After replacing the IC, set the data to the values given in the following
tables. If good performance is not obtained, perform the Adjustments Procedures given in the Notes column.
List of Adjustment Items.
C Function (Video Color)IC2V00
Function DisplayAdjustmentDataInitial DataNotes
NO.Abbrev.DescriptionRange 1080i480i480p
1SBRTSUB-BRIGHT0~6353535353Sub Contrast
2SCOLSUB-COL0~159999Sub Color
3STINSUB-HUE0~158888Sub Tint
4SCONSUB-CON0~157777Sub Contrast
26D-PICDYNAMIC PICTURE0~31111
Page 15
Page 15
MODELS: HD-5000 / HD-5000A
V
JNGL Function (Jungle)IC2V01
DisplayAdjustmentData720P1080i480iNotes
No.Abbrev.DescriptionRange HDHDHD
15HPOSHorizontal Position0~63302528Center
16BLKLBlanking on Left Side0~6315526
17BLKRBlanking on Rigth Side0~63354642
18BLKT
19BLKB
38HFRQ
Number of blanking lines after
Vsync (top blank)
Number of blanking lines
before Vsync (bottom blank)
Horizontal Frequency Control
0~63323237
0~63262627
0~255125263
MNTS Function (Main Decoder)IC2E00
Function DisplayAdjustmentDataNotes
Item #Abbrev.DescriptionRange RFNon RF
1TNTMMain Tint0~632424Preset
2COLMMain Color0~631717"
3YDRMMain Gain Control0~3155Main Y Level
4VPDMPr Pedestal Adjustment0~1577
5UPDMPb Pedestal Adjustment0~1577
Initial Data
SNTS Function (Sub Decoder)IC2H00
Function DisplayAdjustmentDataInitialNotes
Item #Abbrev.DescriptionRange Data
1TNTSSub Tint0~6326Preset
2COLSSub Color0~6318"
3YDRSSub Gain Control0~315Sub Y Level
4VPDSPr Pedestal Adjustment0~157"
5UPDSPb Pedestal Adjustment0~157"
AUDIO FunctionIC3A01
Function DisplayAdjustmentDataInitial Notes
Item #Abbrev.DescriptionRange Data
OSDHDOSD POSITION FOR HD-114249
OSDSDOSD POSITION FOR SD-62754
(MENU-0-3-9-9)
RangeData
Page 16
Page 16
MODELS: HD-5000 / HD-5000A
Adjustment Test Point Location
Test Points
EA pin 1 - Sub Picture (Y)
EA pin 15 - Main Picture (Y)
SUpin 4 - Left Audio
SU pin 6 - Right Audio
ST
OUTPUT
Y/Pr/Pb
SU
4
6
INTPUT
Y/Pr/Pb
Page 17
Page 17
[Audio Circuit]
MODELS: HD-5000 / HD-5000A
Purpose:
Check the input signal level to the MCS circuit
1. MCS Input Level
Measuring
Instrument
Test Point
Ext. Trigger
Measuring
Range
Input Signal
Input Terminal
Oscilloscope
Connector SU pins 6&4
------
50mV/Div
RF Stereo
300 Hz modulation
RF Input
ST
Symptom:
Distorted sound during a stereo broadcast.
1. Supply an RF MCS signal to the Ant A input, 300 Hz at 100% modulation
(25 kHz deviation) for right and left channels.
2. Connect the oscilloscope to connector SU pin 6 (Right Audio).
3. Enter the Adjustment Mode and select the Audio Function.
4. Verify that the Audio Function items are set to the dat a values given the
table below .
5. Set the data for Item “1 INP” for 1.28 Vp-p ±0.06V. (450mv ±10mv rms)
6. Connect the oscilloscope to connector ST pin 4 (Left Audio).
7. Confirm that the left audio level at pin 4 of the ST connector is 1.28 Vp-p
±0.06V (450mv ±20mv rms).
Note: Adjustment 2 (Stereo Separation) must be performed after this adjustment)
CIRCUIT ADJUST MODE
Layer …….. Cable/DBS/DTV
Activate …….. MENU-0-3-5-7
Function …...………..AUDIO
Item No. ……….…….VIDEO
Adjust Data ….…….ADJUST
Save Data …. ………ENTER
Exit …………..MENU (twice)
SU
4
6
AUDIO F un ctio n
Item #Abbrev.Data
1INP8
3WDE3
4SPC3
[Audio Circuit]
2. Separation
Measuring
Instrument
Test Point
Ext. Trigger
Measuring
Range
Input Signal
Input Terminal
Oscilloscope
Conector SU pin 6
------
10mV/Div
RF Stereo
RF Input
Purpose
Symptom:
Check stereo separation
Poor stereo separation
Note: This adjustment must follow Adjustment 1 (Input Level)
1. Supply a RF Stereo Signal (dual tone stereo) to the Ant. A input.
• Left Channel = 300 Hz modulation
• Right Channel = no modulation
2. Connect the oscilloscope to connector SU pin 6 (Right Audio).
3. Enter the Adjustment Mode and select the Audio Function.
4. Set the data for Item “3 WDE” for minimum 300 Hz signal.
5. Change the modulation frequency to 3kHz.
6. Adjust the data for Item “4 SPC” for minimum 3kHz signal.
CIRCUIT ADJUST MODE
Layer …….. Cable/DBS/DTV
Activate …….. MENU-0-3-5-7
Function …...………..AUDIO
Item No. ……….…….VIDEO
Adjust Data ….…….ADJUST
Save Data …. ………ENTER
Exit …………..MENU (twice)
ST
SU
4
6
Page 18
Page 18
[On Screen Display]
A
MODELS: HD-5000 / HD5000A
Purpose:
To position the character display horizontally.
3. Character Position
Measuring
Instrument
Test Point
Ext. Trigger
Measuring
Range
Input Signal
Input Terminal
Video Signal (NTSC/HD)
ANT-A / DTV INPUT
Symptom:
Incorrect display position
1. Supply a 480i signal to Ant-A and select Ant-A as the source.
2. Enter the ‘ADJUST GFX PLANE’ mode, press “MENU-0-3-9-9”.
3. Adjust “OSDSD” to center the OSD horizontally/vertically.
4. Press “MENU” to save data and exit the mode.
5. Supply an 1080i signal to DTV INPUT and select DTV INPUT as the source.
6. Adjust “OSDHD” to center the OSD horizontally/vertically.
7. Press “MENU” to save data and exit the mode.
CIRCUIT ADJUS T M O DE
Layer …….. Cable/DBS/DTV
ctivate …….. MENU-0-3-9-9
Adjust Data ….…….ADJUST
Save Data …. ………ENTER
Exit ………….. MENU (twice)
[Video Circuit]
4. Main/Sub Y Level
Measuring
Instrument
Test Point
Ext. Trigger
Measuring
Range
Input Signal
Input Terminal
Oscilloscope
EA connector pins 15 & 1
------
-----Color Bars
Video Input
Purpose
Symptom:
To set picture luminance
Excess or insufficient brightness.
1. Supply a color bar signal to a Video Input (not an RF input).
2. Select the color bar signal for both the main and sub pictures.
3. Connect the oscilloscope to connector EA pin 15.
4. Activate the Adjustment Mode
5. Select Item “3 YDRM” in the MNTS function.
6. Adjust the data for 0.7 Vp-p max. - 0.67 Vp-p min. at EA pin 15.
(If it cannot be adjusted within this range, set to the lower value)
7. Move the oscilloscope to EA pin 1.
8. Select Item “3 YDRS” in the SNTS function.
9. Adjust the data to equal the MAIN-Y Gain (+0.01V -0.04V).
CIRCUIT ADJUST MODE
Layer …….. Cable/DBS/DTV
Activate …….. MENU-0-3-5-7
Function …...………..AUDIO
Item No. ……….…….VIDEO
Adjust Data ….…….ADJUST
Save Data …. ………ENTER
Exit …………..MENU (twice)
ST
SU
4
6
Page 19
Page 19
[Gain & Offset Alignment]
5. 480P / 1080i Color Alignment
MODELS: HD-5000 / HD-5000A
Purpose:
Symptom:
T o set picture chroma on 480P and 1080i
Output color does not match input color
Measuring
Instrument
Test Point
Ext. Trigger
Measuring
Range
Input Signal
Input Terminal
Oscilloscope
Y/Pb/Pr OUTPUTS
-----10 (usec/div)
200 (mV/div) / 10 (mV/div)
Color Bar / Black Raster
480P & 1080i
(1) Connect an oscilloscope to Y/Pb/Pr of OUTPUTS TO DISPLAY on the back
panel. (terminated at 75Ω) .
(2) Input a full color bar signal (with 100% white level) of 480p (Y/Pb/Pr) to DTV-
INPUT.
(3) Go to the alignment mode (MENU+ 0 3 5 7).
(4) Select Video ADC by using ‘Audio’ button on remote.
(5) Adjust VideoADC item 10 GGAI so that the Y p-p is is equal to the source Y p-p
level (+/- 0.03V).
(6) Adjust VideoADC item 11 BGAI so that the Pb p-p is equal to the source Pb p-p
level (+/- 0.03V).
(7) Adjust VideoADC item 9 RGAI so that the Pr p-p is equal to the source Pr p-p
level (+/- 0.03V).
(8) Input a black raster signal of 480p (Y/Pb/Pr) to
DTV-INPUT.
(9) Adjust VideoADC item 13 GOFS so that the Y
offset level is 0.00Vp-p+/-0.01V.
(10) Adjust VideoADC item 14 BOFS so that the Pb
offset level is 0.00Vp-p+/-0.01V.
(11) Adjust VideoADC item 12 ROFS so that the Pr
offset level is 0.00Vp-p+/-0.01V.
(12) Switch input signal to 1080i and restart at #2.
Y/Pb/Pr
Adjustment Area
Y p-p
Offset Level
Pr p-p
Pb p-p
Page 20
Page 20
MODELS: HD-5000 / HD-5000A
CHIP PARTS REPLACEMENT
Some resistors, shorting jumpers (0 Ohm resistors),
ceramic capacitors, transistors and diodes are chip parts.
The following precautions should be taken when replacing
these parts.
Cautions:
1.Use a fine tipped, well insulated soldering iron
(approximately 30 watts), and tweezers.
2.Melt the solder and remove the chip parts
carefully so as not to tear the copper foil from
the printed circuit board.
3.Discard removed chips; do not reuse them.
4.Do not apply heat for more than 3 (three)
seconds to new chip parts.
5.Avoid using a rubbing stroke when soldering.
6.Take care not to scratch, or damage the chip
parts when soldering.
7.Supplementary cementing is not required.
Chip Parts Removal (Resistors, Capacitors, etc.)
1.Grasp the part with tweezers. Melt the solder
at both sides alternately , and remove one side
of the part with a twisting motion.
2.Melt the solder at the other side and remove
the part.
Chip Parts Removal (T ransistors)
1.Melt the solder of one lead and lift the side of
that lead upward.
2.Simultaneously melt the solder of the other
two leads and lift the part from the PCB.
Replacement
1.Presolder the contact points on the circuit
pattern.
2.Press the part downward with tweezers and
apply the soldering iron as shown.
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MODELS: HD-5000 / HD-5000A
REPLACEMENT PARTS
Parts Ordering
T o expedite delivery of replacement parts orders, specify the following:
1. Model Number/Serial Number
2. Part Number and description
3. Quantity
Note: Unless complete information is supplied, delay in processing of orders will result.
Critical and Warranty Parts Designation
Critical Electrical Components are indicated by Bold Type in the Parts List, and in the schematic
diagrams by shading.
Warranty Return Parts are indicated in the Parts List with an (*).
Parts Tolerance Codes
Refer to the following chart for tolerance characteristics of electrical components.
SF5200296P171010SAW-FIL TER - X6892D
SF5201296P170010SAW-FIL TER - X6941D
J5100451P246010JACK-1394 - MINI
J5110451P246010JACK-1394 - MINI
J5120451P246010
J5601440C393030PIN-JACK-BOARD-1P
Before servicing this chassis, it is important that the service person read the "SAFETY PRECAUTIONS" and
"PRODUCT SAFETY NOTICE" contained in this manual.