Qls 21TS1020 Service Manual - page 11
Service Modes
EN 10
3P66
4.
b. After TV operate normally, use 3P66SN Latam RC to perform Auto-search or select CH03.
c. Enter factory mode (exact details refer to 3P66SN alignement instruction), use Multimeter FLUKE 87 Ⅲ to
measure at J852 to achieve a reading of 0.25 0 .02 Vrms.
d. Enter factory mode page 7
in the selection of BTSC-L1, use multimeter FLUKE 87 Ⅲ to measure R860(CHL)
,
and R862(CHR) ( effective L, R audio output from TDA9580 BTSC demodulation), Adjust BTSC-L1 to achieve
CHR, CHL at 0.5
0.02 Vrms.
e. FLUKE 54200 transmitting colour bar
Signal frequency at 61.25MHZ
Signal strength at 80dB, Item Test1
,
,
under BTSC, BTSC-MOD to set Stereo.
f. Use Dual Trace Oscilloscope, CH1 measures R860 (CHL), CH2 measures R862(CHR).Enter Factory mode
page 7, Select Stereo in BTSC-MODE, adjust BTSC-A1 and BTSC-A2, to achieve the clearest, cleanest, least
interdependent waveforms of 300Hz and 3kHz. Also adjust BTSC-TC, to achieve the best waveform of 300Hz
and 3kHz. (Suggest default value of 4)
g. “Reduce the signal strength of FLUKE 54200 to 30dB, transmitting colour bar, Signal frequency at 61.25MHZ,
BTSC-Stereo, SAP-MOD, audio frequency at L=300Hz, R=3kHZ. Adjust values of BTSC-ST and BTSC-SP while
pressing “SAP” key on the RC, until no detection of Stereo and SAP, then Adjust values of BTSC-ST and
BTSC-SP while pressing “SAP” key on the RC, until proper detection of Stereo and SAP. Final confirmation of
values for BTSC-ST and BTSC-SP.”
4.10. Factories parameters of the adjustment
4.10. Factories parameters of the adjustment
Debugging items and directive from the page " 0" to page" 15" consists of 16 items, and a "predetermined
adjustment page"
Belows are testing the items specified
,
:
(0) Page 0
Service setting
OSD display
Description
Value
Default
Service setting
OSD display
Description
Value
Default
Horizontal shift
HSH
50Hz Horizontal center
0…63
35
Horizontal shift
HSH-60
60Hz Horizontal center
0…63
30
EW Width
EWW
50Hz EW Width
0…63
50
EW Width
EWW-60
60Hz EW Width
0…63
50
Vertical Slope
VSL
50Hz Vertical Slope
0…63
30
Vertical Slope
VSL-60
60Hz Vertical Slope
0…63
30
Vertical Shift
VSH
50Hz Vertical Shift
0…63
35
Vertical Shift
VSH-60
60Hz Vertical Shift
0…63
35
Vertical Amplitude
VAM
50Hz Vertical Amplitude
0…63
25
Vertical Amplitude
VAM-60
60Hz Vertical Amplitude
0…63
25
S-correction
SC
50Hz S-correction
0…63
20
S-correction
SC-60
60Hz S-correction
0…63
20