Sharp 14a2s Owners Manual

114A1-RU
14A2-RU
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SERVICE MANUAL
(14A1-RU) (14A2-RU)
COLOUR TELEVISION
Chassis No. UA-1
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored
to its original condition and only parts identical to those specified should be used.
14A1-RU
14A2-RU
MODELS
SHARP CORPORATION
WARNING
The chassis in this receiver is partially hot.  Use an isolation transformer between the line cord plug and power
receptacle, when servicing this chassis.  To prevent...

2 14A1-RU
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IMPORTANT SERVICE NOTES
Maintenance and repair of this receiver should be done by qualified
service personnel only.SERVICE OF HIGH VOLTAGE SYSTEM AND PIC-
TURE TUBEWhen servicing the high voltage system, remove static charge from it by
connecting a 10K ohm Resistor in series with an insulated wire(such as a
test probe) between picture tube  dag and 2nd anode lead.  (AC line cord
should be disconnected from AC outlet.)1. Picture tube in this receiver employs integral  implosion...

314A1-RU
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ADJUSTMENT PRECAUTIONS
This  models  setting  are  adjusted  in  two  different  ways:  through  the  I
2C  bus  control and  in  the conventional
analog  manner.  The  adjustments via the I
2C bus control include  preset-only items and variable data.
1. Setting the service mode by the microprocessor.
1.  Short JA 122 & JA 124 for 1 second and release to switch to the service mode position, and  the
microprocessor is in input mode. (Adjustment through the I
2C bus control). (Use...

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Y-DELAY
ADJ.
MODE
¯
Y-D TIME FOR PAL (TV) (DL-PT)
¯
Y-D TIME FOR SECAM (TV) (DL-ST)
¯
Y-D TIME FOR N358 (TV) (DL-3T)
¯
Y-D TIME FOR N443 (TV) (DL-4T)
¯
Y-D TIME FOR B/W (TV) (DL-TV)
¯
Y-D TIME FOR PAL (AV) (DL-PA)
¯
Y-D TIME FOR SECAM (AV) (DL-SA)
¯
Y-D TIME FOR N358 (AV) (DL-3A)
¯
Y-D TIME FOR N443(AV) (DL-4A)
¯
Y-D TIME FOR B/W (AV) (DL-AV)
*(Y-D : Y-DELAY)OFFSET
ADJ.
MODE
¯
COLOUR OFFSET (PAL) (COL-OP)
¯
COLOUR OFFSET (SECAM) (COL-OS)
  ¯
COLOUR OFFSET (NTSC358) (COL-O3)
¯...

514A1-RU
14A2-RU
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EEPROM ITEMS OSD DATA LENGTH
INITIAL DATA
FIX/ADJ REMARK
VERTICAL SCAN DISABLE VSD
0(DISABLE)/1(ENABLE)
0 FIX
BLACK STRETCH BKS
0(DISABLE)/1(ENABLE)
1 FIX
AUTOMATIC VOLUME LEVELING AVL
0(DISABLE)/1(ENABLE)
1 FIX
FAST FILTER IF-PLL FFI
0(DISABLE)/1(ENABLE)
0 FIX
ENABLE VERTICAL GUARD (RGB BLANKING)
EVG
0(DISABLE)/1(ENABLE)
1 FIX ONLY BLK
EHT TRACKING MODE (HCO) EHT
0(DISABLE)/1(ENABLE)
1 FIX
OVERSCAN SWITCH OFF OSO
0(DISABLE)/1(ENABLE)
0 FIX
AUTO COLOUR LIMIT ACL...

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INITIAL SETTING
(1).  In service mode, After execute select POS 1, store the following tuning data in EEPROM.
MCL1
CH-NO Fv (MHz) SOUND SYS
MCL1
CH-NO Fv (MHz) SOUND SYS01 48.25 B/G2 62.25 B/G3 77.25 D/K4 175.25 B/G5 182.25 B/G6 183.25 D/K7 191.25 D/K8 196.25 B/G9 199.25 M10 210.25 B/G11 224.25 B/G12 471.25 B/G13 487.25 I14 503.25 B/G15 575.25 B/G16 583.25 B/G17 599.25 B/G18 621.25 M19 639.25 D/K20 703.25 B/G21 735.25 I22 767.25 B/G23 815.25 B/G24 855.25 I25 855.25 B/G26 55.25...

714A1-RU
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PURITY ADJUSTMENT
No. Adjusting point Adjusting procedure/conditions Waveform and others
PURITY ADJ.1. Receive the GREEN-ONLY signal. Adjust the
beam current to about 500 mA.
2. Degauss the CRT enough with the degausing coil.
Note: Follow the Job Instruction Sheet to ad-
just the magnetic field.
Vertical Bv : +0.040 mT (0.40 gauss)
Horizontal Bh: +0.020 mT (0.20 gauss)
(See page 6.)
3. Maintain the purity magnet at the zero magnetic
field and keep the static convergence roughly...

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CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENTNo. Adjusting point Adjusting procedure/conditions Waveform and others
CRT CUTOFF
ADJUSTMENT
(I
2C BUS
CONTROL)1. Switch TV to VIDEO mode,BLUE BACK OFF, with
NO VIDEO signal.
2. Press R/C to set Picture Normal condition.
3. Connect the oscilloscope to Red OUT from
IC801.(TP851)
Range : 1 V/Div    (DC)
Sweep : 5 msec/Div
4. Adjust SCREEN VR ,so that the tip of signal reach
3.0 Vdc + 0.1 Vdc. 1
1 V 3.0Vdc
0
Maximum
beam check1....

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No. Adjusting point Adjusting procedure/conditions Waveform and others
SUB-TINT (I
2C
BUS CON-
TROL)1. Receive the NTSC3.58 Colour Bar signal
through AV in.
2. Connect the oscilloscope to TP853 (Pin (5) of
P882) BLUE-OUT.
ÈRange : 100mV/div. (AC)(Use Probe 10:1)
ÈSweep time : 10 msec/div.
3. Call the SUB-TINT mode in service mode. Ad-
just the SUB-TINT bus data to obtain the wave-
form shown as Fig. 9.
4. Clear the SERVICE mode. 1
NTSC CHROMA ADJUSTMENT
No. Adjusting point...

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FUNCTION OPERATION CHECKING (VIDEO AND AUDIO)
(Continued)
No. Adjusting point Adjusting procedure/conditions Waveform and others
COLOUR
SYSTEM1. Receive the PAL COLOUR BAR signal, press
the COLOUR SYSTEM key to select modes ex-
cept PAL, check the COLOUR is not working prop-
erly. Then, select the PAL mode. Check again
its colour so that it is working properly.
2. Receive NTSC 4.43/3.58 COLOUR BAR signal
thru AV, press COLOUR SYSTEM key to select
modes except N4.43/3.58,...