S/M No. : TWP895BEF0
Service Manual
Colour Television
CHASSIS
WP-895
WP-895F
CP-885
CP-885F
DAEWOO ELECTRONICS CO., LTD
http : //svc.dwe.co.kr |
AUG. 2001 |
Service manual WP-895/895F. CP885/885F
Contents
1 - Main features ........................................................................................................................................................ |
4 |
|
1-1 Specifications .................................................................................................................................................. |
4 |
|
1-2 Channel table .................................................................................................................................................. |
8 |
|
1-3 ATSS sorting method ....................................................................................................................................... |
11 |
|
2 - Safety instruction ................................................................................................................................................. |
13 |
|
3 - Alignment instructions ........................................................................................................................................ |
14 |
|
3-1 Microcontroller configuration : Service mode ................................................................................................... |
14 |
|
3-2 Service mode navigation ................................................................................................................................. |
14 |
|
3-3 Microcontroller configuration : Option .............................................................................................................. |
15 |
|
3-4 TV set Alignment ............................................................................................................................................. |
15 |
|
3-4-1 |
Local oscillator alignment .................................................................................................................... |
15 |
3-4-2 |
G2 alignment ....................................................................................................................................... |
15 |
3-4-3 |
White balance ..................................................................................................................................... |
15 |
3-4-4 Focus .................................................................................................................................................. |
15 |
|
3-4-5 |
Vertical geometry ................................................................................................................................ |
15 |
3-4-6 |
Horizontal picture centring................................................................................................................... |
16 |
3-4-7 |
East/West correction ........................................................................................................................... |
16 |
3-4-8 AGC .................................................................................................................................................... |
17 |
|
4 - IC description ....................................................................................................................................................... |
18 |
|
4-1 VCT383xA TV signal processor - Teletext decoder with embedded 8 bit |
- |
|
Controller |
............................................................................................................................................................ |
18 |
4-1-1 Block diagram off the VCT ................................................................................................................... |
18 |
|
4-1-2 |
TV-signal Processor ........................................................................................................................... |
18 |
4-1-2 |
-Controller ......................................................................................................................................... |
19 |
4-1-4 |
Teletext Features ................................................................................................................................ |
19 |
4-1-5 |
Displaty OSD Features ...................................................................................................................... |
20 |
4-1-6 |
Audio Features ................................................................................................................................... |
20 |
4-1-7 |
General Features ............................................................................................................................... |
20 |
4-1-8 |
Data Capture ....................................................................................................................................... |
20 |
4-1-9 |
Data Capture Features ........................................................................................................................ |
20 |
4-1-10 TV processor version and -Controller capacity .............................................................................. |
21 |
|
4-1-11 IC marking and version ....................................................................................................................... |
21 |
|
4-1-12 Pinning ................................................................................................................................................ |
21 |
|
4-2 MSP341x Multistandard Sound Processor ................................................................................................... |
24 |
|
4-2-1 Basic Features of the MSP 341x ......................................................................................................... |
24 |
|
4-3 TDA4470 - Multistandard Video-IF and Quasi Parallel Sound Processor ...................................................... |
28 |
|
4-3-1 Description .......................................................................................................................................... |
28 |
|
4-3-2 Features .............................................................................................................................................. |
28 |
|
4-3-3 Pinning ................................................................................................................................................ |
28 |
|
4-3-4 |
Block diagram .................................................................................................................................... |
29 |
4-4 TDA894xJ Stereo Audio Amplifier ................................................................................................................. |
30 |
|
4-4-1 Features ............................................................................................................................................... |
30 |
|
4-5 TDA835xJ Vertical Amplifier ........................................................................................................................... |
32 |
|
4-5-1 |
TDA8357J ........................................................................................................................................... |
32 |
- 1 -
Service ma nual WP-895/895F. CP885/885F
4-5-2 TDA8358J .............................................................................................................................................. |
33 |
|
4-6 TDA6107Q .......................................................................................................................................................... |
34 |
|
4-7 24C16 - 16 Kb EEPROM .................................................................................................................................... |
37 |
|
4-8 STR - F6653 ....................................................................................................................................................... |
38 |
|
4-8-1 |
General description ............................................................................................................................... |
38 |
4-8-2 |
Features ................................................................................................................................................. |
38 |
4-8-3 |
Block diagram ....................................................................................................................................... |
38 |
4-8-4 |
Pin description ...................................................................................................................................... |
39 |
4-8-5 |
Control part - electrical characteristics ................................................................................................. |
39 |
4-8-6 |
MOSFET electrical characteristics ....................................................................................................... |
40 |
5 - Circuit description .................................................................................................................................................. |
41 |
|
5-1 Block diagram .................................................................................................................................................... |
41 |
|
5-2 IF section ............................................................................................................................................................ |
42 |
|
5-2-1 |
Block diagram ....................................................................................................................................... |
42 |
5-2-2 |
Vision IF Amplifier .................................................................................................................................. |
42 |
5-2-3 |
Tuner-and VIF-ACG ................................................................................................................................ |
43 |
5-2-4 |
FPLL, VCO and AFC .............................................................................................................................. |
43 |
5-2-5 |
Video Demodulation and Amplifier ...................................................................................................... |
44 |
5-5-6 |
Sound IF Amplifier and SIF-AGC ....................................................................................................... |
44 |
5-2-7 |
Quasi-Parallel-Sound (QPS) Mixer ......................................................................................................... |
44 |
5-2-8 |
Standard Switch .................................................................................................................................... |
44 |
5-2-9 |
L’ Switch .................................................................................................................................................. |
44 |
5-2-10 Internal Voltage Stabiliser ..................................................................................................................... |
44 |
|
5-3 Video - VCT description ...................................................................................................................................... |
45 |
|
5-3-1 |
Introduction ............................................................................................................................................ |
45 |
5-3-2 |
Video Front-end ..................................................................................................................................... |
45 |
5-3-3 |
Input Selector ........................................................................................................................................ |
45 |
5-3-4 Clamping ................................................................................................................................................ |
45 |
|
5-3-5 |
Automatic Gain Control ........................................................................................................................ |
45 |
5-3-6 |
Digitally Controlled Clock Oscillator ..................................................................................................... |
45 |
5-3-7 |
Analogue Video Output ........................................................................................................................ |
45 |
5-3-8 |
Adaptive Comb Filter (VCT3834A only) ................................................................................................ |
46 |
5-3-9 |
Color Decoder ....................................................................................................................................... |
46 |
5-3-10 Horizontal Scaler ................................................................................................................................... |
46 |
|
5-3-11 Video Sync Processing ........................................................................................................................ |
47 |
|
5-3-12 Display Processing ................................................................................................................................ |
47 |
|
5-3-13 Chroma Transient Improvement ............................................................................................................ |
47 |
|
5-3-14 Video Back-end ..................................................................................................................................... |
47 |
|
5-3-15 CRT Measurement and Control ........................................................................................................... |
48 |
|
5-3-16 Average Beam Current Limiter ............................................................................................................. |
48 |
|
5-3-17 Analogue RGB Insertion ...................................................................................................................... |
48 |
|
5-3-18 Fast-Blank Monitor ................................................................................................................................ |
48 |
|
5-3-19 Vertical and East/West Deflection ....................................................................................................... |
49 |
|
5-3-20 |
EHT Compensation ................................................................................................................................ |
49 |
5-3-21 Reset Function ...................................................................................................................................... |
49 |
|
5-3-22 Standby and Power-On ........................................................................................................................ |
49 |
|
5-4 Micro-controller ................................................................................................................................................... |
49 |
- 2 -
|
Service manual WP-895/895F. CP885/885F |
|
5-4-1 |
Introduction........................................................................................................................................... |
49 |
5-4-2 CPU ...................................................................................................................................................... |
49 |
|
5-4-3 -Controller I/O pin configuration and function ............................................................................... |
50 |
|
5-4-4 Tuning .................................................................................................................................................. |
50 |
|
5-4-5 |
Automatic Format switching and WSS ............................................................................................... |
50 |
5-4-6 |
EXTERNAL source control logic........................................................................................................... |
51 |
5-4-7 |
Over Current Protection........................................................................................................................ |
53 |
5-5Teletext Display ................................................................................................................................................. |
53 |
|
5-6 Sound processing............................................................................................................................................... |
54 |
|
5-6-1 |
Analogue sound IF-input section............................................................................................................ |
54 |
5-6-2 |
Quadrature Mixers ................................................................................................................................ |
54 |
5-6-3 |
Phase and AM discr imination........................................................................................................... |
54 |
5-6-4 |
NICAM decoder.................................................................................................................................... |
55 |
5-6-5 |
DSP section.......................................................................................................................................... |
55 |
5-6-6 |
Sound Mode switching.......................................................................................................................... |
55 |
5-7 Sound amplification........................................................................................................................................... |
55 |
|
5-7-1 |
Power amplifier..................................................................................................................................... |
55 |
5-7-2 |
Mode selection....................................................................................................................................... |
56 |
5-8 Vertical deflection............................................................................................................................................. |
56 |
|
5-8-1 |
Flyback voltage..................................................................................................................................... |
56 |
5-8-2 Protection.............................................................................................................................................. |
56 |
|
5-8-3 |
Guard circuit.......................................................................................................................................... |
56 |
5-8-4 |
Damping resistor................................................................................................................................... |
56 |
5-8-5 |
EAST-WEST Amplifier (TDA8358J only)............................................................................................... |
56 |
5-9 Power supply (STR F6653).. .............................................................................................................................. |
57 |
|
5-9-1 |
STR-F6654 genera al description......................................................................................................... |
57 |
5-9-2 |
Power supply primary par t operations................................................................................................... |
57 |
5-10TV start-up, TV normal run and stand by mode operations............................................................................... |
61 |
|
5-10-1 TV start-up operations.......................................................................................................................... |
61 |
|
5-10-2 TV normal run and stand-by mode operations....................................................................................... |
62 |
|
6 - Service parts list................................................................................................................................................... |
67 |
|
7 - ExplodedView ........................................................................................................................................................ |
75 |
|
7-1DWX-28W5 ....................................................................................................................................................... |
75 |
|
7-2DWF-28W8 ....................................................................................................................................................... |
76 |
|
7-3DTF-29U8 ....................................................................................................................................................... |
77 |
|
7-4DTP-28A7 ....................................................................................................................................................... |
78 |
|
7-5DTP-28B1 ....................................................................................................................................................... |
79 |
|
7-6DTP-28G7 ....................................................................................................................................................... |
80 |
|
7-7DTP-28G8 ....................................................................................................................................................... |
81 |
8 - PCB Layout
9 - Circuit Diagram
- 3 -
Service manual WP 895/895F, CP885/885F
1- Main Features
1-1 Specifications
TV standard |
PAL - SECAM B/G D/K, PAL I/I, SECAM L/L’ |
||
Sound system |
NICAM B/G, I, D/K, L, |
||
|
FM 2Carrier B/G, D/K |
||
Power consumption |
21” |
Real Falt : 59 W approx. |
|
|
28” |
4:3, FST : 69 W approx. |
|
|
29" 4:3, REAL FALT : 74 W approx. |
||
|
28” 16:9, WIDE : 69 W approx. |
||
|
|
|
|
Sound Output Power |
21” : 4.5W x 2 (at 1kHz, 60% mod, 10%THD) |
||
|
28”, 29" : 7W x 2 (at 1kHz, 60% mod, 10%THD) |
||
Speaker |
21” : 7W 8 ohm x2 |
||
|
28”, 29” : 12W 8 ohm x2 |
||
Teletext system |
10 pages memory FASTEXT (FLOF or TOP) |
||
Aerial input |
75 ohm unbalanced |
||
Channel coverage |
Off-air channels, S-cable channels and hyperband |
||
Tuning system |
frequency synthesiser tuning system |
|
|
Visual screen |
21” : 51 cm |
||
|
28” : 66 cm |
||
|
29” : 68 cm |
||
Channel indication |
On Screen Display |
||
Program Selection |
100 programmes |
||
Aux. terminal |
EURO-SCART 1 : Audio / Video In and Out, R/G/B In, Slow and |
||
|
Fast switching. |
||
|
EURO-SCART 2 : Audio / Video In and Out, SVHS In. |
||
|
Monitor Out(option) |
||
|
AV3 : Audio-Video Jack on front of cabinet. |
||
|
Headphone jack (3.5 mm) on front of cabinet |
||
|
SVHS3 (option) : Jack on front of cabinet - sound input common with AV3. |
||
|
|
|
|
Remote Control Unit |
R-46G22 |
- 4 -
Service manual WP 895/895F, CP885/885F
Specification matrix
CHASSIS NAME |
WP895 |
WP895F |
CP885 |
CP885F |
||||||||
|
|
|
|
|
|
|
|
|
||||
VCT VERSION |
3834 |
3834 |
3832 |
3834 |
||||||||
SOFTWARE VERSION |
|
A |
|
A |
|
B |
|
A |
||||
REMOTE CONTROL |
R46G22 |
R46G22 |
R46G22 |
R46G22 |
||||||||
PCB SERIAL NUMBER |
4859805093 |
4859805193 |
4859805093 |
4859805193 |
||||||||
TUBE |
16:09 |
16:9 REAL FLAT |
|
4:03 |
4:3 REAL FLAT |
|||||||
SVHS3 |
|
|
|
|
|
|
|
|
|
|
|
|
"PICTURE IMPROVE- |
|
|
|
|
|
|
|
|
|
|
|
|
MENTS, COMB FILTER, |
|
|
|
|
|
|
|
|
|
|
|
|
HORIZONTAL SCALER" |
|
|
|
|
|
|
|
|
|
|
|
|
TELETEXT SPLIT SCREEN |
|
|
|
|
|
|
|
|
|
|
|
|
FORMATS AVAILABLE IN |
AUTO / 4:3 / 14:9 / ZOOM 14:9 / |
AUTO / 4:3 / 14:9 / ZOOM 14:9 / |
AUTO / FULL SCREEN / 14:9 / |
AUTO / FULL SCREEN / 14:9 / |
||||||||
VIDEO MODE |
ZOOM 16:9 / FULL SCREEN |
ZOOM 16:9 / FULL SCREEN |
|
16:9 |
16:9 / WATERGLASS |
|||||||
AV2 MONITOR OUTPUT |
|
|
|
|
|
|
|
|
|
|
|
|
MSP VERSION (OPTION) |
3410 |
|
3411 |
3410 |
|
3411 |
3410 |
|
3415 |
3410 |
|
3411 |
SOUND EFFECTS |
OFF / SPATIAL |
|
OFF / SPATIAL |
OFF / SPATIAL |
|
OFF / SPATIAL |
OFF / SPATIAL |
|
OFF / SPATIAL |
OFF / SPATIAL |
|
OFF / SPATIAL |
|
|
|
/ PANORAMA / |
|
|
/ PANORAMA / |
|
|
|
|
|
/ PANORAMA / |
|
|
|
VIRTUAL |
|
|
VIRTUAL |
|
|
|
|
|
VIRTUAL |
|
|
|
DOLBY |
|
|
DOLBY |
|
|
|
|
|
DOLBY |
GRAPHIC EQUALIZER |
|
|
|
|
|
|
|
|
|
|
|
|
AV3 AUDIO INPUT |
DEDICATED |
|
DEDICATED |
DEDICATED |
|
DEDICATED |
DEDICATED |
|
AV2 COMMON |
DEDICATED |
|
DEDICATED |
TELETEXT PAGE MEMORY |
10 |
PAGE |
10 |
PAGE |
10 PAGE |
10 PAGE |
||||||
TOP TELETEXT |
|
|
|
|
|
|
|
|
||||
|
|
AVAILABLE : SELECTABLE IN FACTORY/SERVICE MODE BY OPTION BITS |
|
|
||||||||
FLOF TELETEXT |
|
|
AVAILABLE : SELECTABLE IN FACTORY/SERVICE MODE BY OPTION BITS |
|
|
|||||||
TEXT CHARACTER |
|
|
|
|
|
"Pan-European Latin, Cyrillic, Greek" |
|
|
|
|||
SUPPORT |
|
|
|
|
|
|
|
|
|
|
|
|
OSD LANGUAGES |
"English, French, German, Italian, Spanish, Dutch, Danish, Finnish, Norwegian, Swedish, Greek, Polish, Hungarian, Czech, Slovakian, Roma- |
|||||||||||
|
|
|
|
|
|
nian, Russian." |
|
|
|
|
|
|
TUNER OPTIONS |
|
|
|
|
|
"Philips, ALPS" |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
- 5 -
Service manual WP 895/895F, CP885/885F
21 Pin EURO-SCART 1 :
Pin |
Signal Description |
Matching value |
|
1 |
Audio Output Right |
0.5 Vrms, Impedance < 1 |
, ( RF 54% Mod ) |
2 |
Audio Input Right |
0.5 Vrms, Impedance > 10 |
|
3 |
Audio Output Left |
0.5 Vrms, Impedance < 1 |
, ( RF 54% Mod ) |
4Audio Earth
5Blue Earth
6 |
Audio Input Left |
0.5 Vrms, Impedance > 10 |
7 |
Blue Input |
0.7 Vpp ±0.1 V, Impedance 75 |
8 |
Slow Switching |
TV : 0 to 2V, AV 16/9 : 4.5 to 7V, AV 4/3 : 9.5 to 12V , |
|
|
Impedance > 10 |
9 |
Green Earth |
|
10 |
N.C. |
|
11 |
Green Input |
0.7 Vpp 0.1V, Impedance 75 |
12N.C.
13Red Earth
14Blanking Earth
15 |
Red |
Input |
0.7 Vpp 0.1V, Impedance 75 |
16 |
Fast |
Switching |
0 to 0.4V : Logic “0”, 1 to 3V : Logic “1”, Impedance 75 |
17Video Out Earth
18Video In Earth
19 |
Video Output |
1 Vpp |
3dB, Impedance 75 |
||
|
20 |
Video Input |
1 Vpp |
3dB, Impedance 75 |
|
|
21 |
Common Earth |
|
|
|
21 Pin EURO-SCART 2 : |
|
|
|
||
|
|
|
|
|
|
|
Pin |
Signal Description |
Matching value |
|
|
|
1 |
Audio Output Right |
0.5 Vrms, Impedance < 1 |
, ( RF 54% Mod ) - Not available for cp885 |
|
|
2 |
Audio Input Right |
0.5 Vrms, Impedance > 10 |
|
|
|
3 |
Audio Output Left |
0.5 Vrms, Impedance < 1 |
, ( RF 54% Mod ) - Not available for cp885 |
4Audio Earth
5Earth
6 |
Audio Input Left |
0.5 Vrms, Impedance > 10 |
7 |
N.C. |
|
8 |
Slow Switching |
TV: 0 to 2V, AV 16:9: 4.5V to 7V, AV 4:3: 9.5 to 12V |
9 |
N.C. |
|
10N.C.
11N.C.
12N.C.
13Earth
14Earth
15 Chroma Input |
3dB for a luminance signal of 1 Vpp |
16N.C.
17Earth
18Video In Earth
- 6 -
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Service manual WP 895/895F, CP885/885F |
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
19 |
Video Output |
1 Vpp |
|
3dB, Impedance 75 ( Monitor output ) - Not available for cp885 |
|
||||||||||||||||||
20 |
Video Input, Y In. |
1 Vpp |
|
3dB, Impedance 75 |
|
||||||||||||||||||
21 |
Common Earth |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
- 7 -
Service manual WP 895/895F, CP885/885F
1-2 Channel table
FREQUENCY TABLE
CH |
EUROPE CCIR |
FRANCE |
GB(IRELAND) |
EAST OIRT |
C01 |
46.25 |
- |
47.75 |
49.75 |
C02 |
48.25 |
55.75 (L’) |
53.75 |
59.25 |
C03 |
55.25 |
60.5 (L’) |
61.75 |
77.25 |
C04 |
62.25 |
63.75 (L’) |
175.25 |
85.25 |
C05 |
175.25 |
176.00 |
183.25 |
93.25 |
C06 |
182.25 |
184.00 |
191.25 |
175.25 |
C07 |
189.25 |
192.00 |
199.25 |
183.25 |
C08 |
196.25 |
200.00 |
207.25 |
191.25 |
C09 |
203.25 |
208.00 |
215.25 |
199.25 |
C10 |
210.25 |
216.00 |
223.25 |
207.25 |
C11 |
217.25 |
189.25 (LUX) |
231.25 |
215.25 |
C12 |
224.25 |
69.25 (L’) |
239.25 |
223.25 |
C13 |
53.75 |
76.25 (L’) |
247.25 |
- |
C14 |
- |
83.25 (L’) |
49.75 |
- |
C15 |
82.25 |
90.25 |
57.75 |
- |
C16 |
- |
97.25 |
65.75 |
- |
C17 |
183.75 |
- |
77.75 |
- |
C18 |
192.25 |
- |
85.75 |
- |
C19 |
201.25 |
- |
- |
- |
C20 |
- |
- |
- |
- |
C21 |
471.25 |
471.25 |
471.25 |
471.25 |
C22 |
479.25 |
479.25 |
479.25 |
479.25 |
C23 |
487.25 |
487.25 |
487.25 |
487.25 |
C24 |
495.25 |
495.25 |
495.25 |
495.25 |
C25 |
503.25 |
503.25 |
503.25 |
503.25 |
C26 |
511.25 |
511.25 |
511.25 |
511.25 |
C27 |
519.25 |
519.25 |
519.25 |
519.25 |
C28 |
527.25 |
527.25 |
527.25 |
527.25 |
C29 |
535.25 |
535.25 |
535.25 |
535.25 |
C30 |
543.25 |
543.25 |
543.25 |
543.25 |
C31 |
551.25 |
551.25 |
551.25 |
551.25 |
C32 |
559.25 |
559.25 |
559.25 |
559.25 |
C33 |
567.25 |
567.25 |
567.25 |
567.25 |
C34 |
575.25 |
575.25 |
575.25 |
575.25 |
C35 |
583.25 |
583.25 |
583.25 |
583.25 |
C36 |
591.25 |
591.25 |
591.25 |
591.25 |
C37 |
599.25 |
599.25 |
599.25 |
599.25 |
C38 |
607.25 |
607.25 |
607.25 |
607.25 |
C39 |
615.25 |
615.25 |
615.25 |
615.25 |
C40 |
623.25 |
623.25 |
623.25 |
623.25 |
C41 |
631.25 |
631.25 |
631.25 |
631.25 |
- 8 -
Service manual WP 895/895F, CP885/885F
CH |
EUROPE CCIR |
FRANCE |
GB(IRELAND) |
EAST OIRT |
C42 |
639.25 |
639.25 |
639.25 |
639.25 |
C43 |
647.25 |
647.25 |
647.25 |
647.25 |
C44 |
655.25 |
655.25 |
655.25 |
655.25 |
C45 |
663.25 |
663.25 |
663.25 |
663.25 |
C46 |
671.25 |
671.25 |
671.25 |
671.25 |
C47 |
679.25 |
679.25 |
679.25 |
679.25 |
C48 |
687.25 |
687.25 |
687.25 |
687.25 |
C49 |
695.25 |
695.25 |
695.25 |
695.25 |
C50 |
703.25 |
703.25 |
703.25 |
703.25 |
C51 |
711.25 |
711.25 |
711.25 |
711.25 |
C52 |
719.25 |
719.25 |
719.25 |
719.25 |
C53 |
727.25 |
727.25 |
727.25 |
727.25 |
C54 |
735.25 |
735.25 |
735.25 |
735.25 |
C55 |
743.25 |
743.25 |
743.25 |
743.25 |
C56 |
751.25 |
751.25 |
751.25 |
751.25 |
C57 |
759.25 |
759.25 |
759.25 |
759.25 |
C58 |
767.25 |
767.25 |
767.25 |
767.25 |
C59 |
775.25 |
775.25 |
775.25 |
775.25 |
C60 |
783.25 |
783.25 |
783.25 |
783.25 |
C61 |
791.25 |
791.25 |
791.25 |
791.25 |
C62 |
799.25 |
799.25 |
799.25 |
799.25 |
C63 |
807.25 |
807.25 |
807.25 |
807.25 |
C64 |
815.25 |
815.25 |
815.25 |
815.25 |
C65 |
823.25 |
823.25 |
823.25 |
823.25 |
C66 |
831.25 |
831.25 |
831.25 |
831.25 |
C67 |
839.25 |
839.25 |
839.25 |
839.25 |
C68 |
847.25 |
847.25 |
847.25 |
847.25 |
C69 |
855.25 |
855.25 |
855.25 |
855.25 |
C70 |
863.25 |
863.25 |
863.25 |
863.25 |
C71 |
69.25 |
- |
- |
- |
C72 |
76.25 |
- |
- |
- |
C73 |
83.25 |
- |
- |
- |
C74 |
90.25 |
- |
- |
- |
C75 |
97.25 |
- |
- |
- |
C76 |
59.25 |
- |
- |
- |
C77 |
93.25 |
- |
- |
- |
S01 |
105.25 |
104.75 |
103.25 |
105.25 |
S02 |
112.25 |
116.75 |
111.25 |
112.25 |
S03 |
119.25 |
128.75 |
119.25 |
119.25 |
S04 |
126.25 |
140.75 |
127.25 |
126.25 |
S05 |
133.25 |
152.75 |
135.25 |
133.25 |
S06 |
140.25 |
164.75 |
143.25 |
140.25 |
S07 |
147.25 |
176.75 |
151.25 |
147.25 |
S08 |
154.25 |
188.75 |
159.25 |
154.25 |
S09 |
161.25 |
200.75 |
167.25 |
161.25 |
- 9 -
Service manual WP 895/895F, CP885/885F
CH |
EUROPE CCIR |
FRANCE |
GB(IRELAND) |
EAST OIRT |
S10 |
168.25 |
212.75 |
- |
168.25 |
S11 |
231.25 |
224.75 |
- |
231.25 |
S12 |
238.25 |
236.75 |
- |
238.25 |
S13 |
245.25 |
248.75 |
255.25 |
245.25 |
S14 |
252.25 |
260.75 |
263.25 |
252.25 |
S15 |
259.25 |
272.75 |
271.25 |
259.25 |
S16 |
266.25 |
284.75 |
279.25 |
266.25 |
S17 |
273.25 |
296.75 |
287.25 |
273.25 |
S18 |
280.25 |
136.00 |
295.25 |
280.25 |
S19 |
287.25 |
160.00 |
303.25 |
287.25 |
S20 |
294.25 |
- |
- |
294.25 |
S21 |
303.25 |
303.25 |
- |
303.25 |
S22 |
311.25 |
311.25 |
311.25 |
311.25 |
S23 |
319.25 |
319.25 |
319.25 |
319.25 |
S24 |
327.25 |
327.25 |
327.25 |
327.25 |
S25 |
335.25 |
335.25 |
335.25 |
335.25 |
S26 |
343.25 |
343.25 |
343.25 |
343.25 |
S27 |
351.25 |
351.25 |
351.25 |
351.25 |
S28 |
359.25 |
359.25 |
359.25 |
359.25 |
S29 |
367.25 |
367.25 |
367.25 |
367.25 |
S30 |
375.25 |
375.25 |
375.25 |
375.25 |
S31 |
383.25 |
383.25 |
383.25 |
383.25 |
S32 |
391.25 |
391.25 |
391.25 |
391.25 |
S33 |
399.25 |
399.25 |
399.25 |
399.25 |
S34 |
407.25 |
407.25 |
407.25 |
407.25 |
S35 |
415.25 |
415.25 |
415.25 |
415.25 |
S36 |
423.25 |
423.25 |
423.25 |
423.25 |
S37 |
431.25 |
431.25 |
431.25 |
431.25 |
S38 |
439.25 |
439.25 |
439.25 |
439.25 |
S39 |
447.25 |
447.25 |
447.25 |
447.25 |
S40 |
455.25 |
455.25 |
455.25 |
455.25 |
S41 |
463.25 |
463.25 |
463.25 |
463.25 |
- 10 -
Service manual WP 895/895F, CP885/885F
1-3 ATSS sorting method
The TV set sweeps all the TV bands from beginning of VHF to end of UHF. The TV controlling software for each program checks if a VPS CNI code is transmitted ( this system exists for German, Swiss and Austrian transmissions). If no VPS CNI code is found, then the system check if a CNI code is transmitted as part of the teletext transmission
( Packet 8/30 format 1 ). If such a code ( VPS or teletext ) is found and if this code is in the ATSS list, the program is automatically named.
If the transmission does not have VPS CNI, and no teletext service is availab le, then there is no possibility of the program being automatically named.
The programs found are then sorted in 4 groups :
Group I : It contains all the pro grams from the selected country and named by the TV controlling software. Within this group the sorting order is fixed by the ATSS list.
Group II : It contains all the pro grams with a strong signal strength which are not listed in group I. Group III : It contains all the pro grams with a weak signal strength which are not listed in group I.
Group IV : If two or more programs with the same code are found, only the strongest ( or if they have the same level the one with the lowest frequency) is listed in group I, II or III. The others are listed in group IV.
|
Program |
Group |
Skip |
|
|
number |
|||
|
|
|
||
1 |
|
|
|
|
2 |
|
Group I |
|
|
... |
|
|
|
|
|
n |
|
|
|
|
n+1 |
|
|
|
... |
|
Group II |
|
|
|
m |
|
|
|
|
m+1 |
|
|
|
... |
|
Group III |
|
|
|
p |
|
|
|
|
p+1 |
|
|
|
... |
|
Group IV |
|
|
|
q |
|
|
|
|
q+1 |
|
|
|
.... |
|
not used |
|
|
|
99 |
|
|
|
0 |
|
|
|
Program |
Group |
Skip |
|
number |
|||
|
|
||
1 |
|
|
|
... |
Group II |
|
|
m |
|
|
|
m+1 |
|
|
|
|
Group III |
|
|
... |
|
||
p |
|
|
|
p+1 |
|
|
|
|
Group IV |
|
|
... |
|
||
q |
|
|
|
q+1 |
|
|
|
|
not used |
|
|
.... |
|
||
99 |
|
|
|
0 |
|
|
Special case : Country selection = Others
Special case : France
Note : If two programs with the same name but a different code ar e found these two programs are listed in group I, II or III ( e.g. Regional pro gram SW3 in Germany ).
- 11 -
Service manual WP 895/895F, CP885/885F
The sor ting order within group II, III, and IV is based on the channel frequency. The Pro gram with the lo west frequency is allocated the first rank in its group, and so f orth until the last program of the group which has the highest fr equency.
Special case : France
If France is selected, the TV controlling softw are f irst swe e ps all TV bands with Fr ance system selected
( positi ve video modulation) and the a second time with Europe system selected ( nega tive video modulation).
Special case : Switzerland
If Switzerland is selected the TV controlling softw are f irst s we e ps all TV bands with Eur ope system selected (ne ga tive video modulation) and then a second time with France system selected ( positive video modulation).
Special case : GB
Note for sa tellite recei ver users : Before starting ATSS tur n On your satellite r ecei ver and tune “ SKY NEWS ”. If GB is selected the TV controlling software seeks for programs only in UHF ( C21 to C70 ).
The sorting order is :
1 |
- BBC1 |
2 |
- BBC2 |
3 |
- ITV |
4 |
- CH4 |
5 |
- CH5 |
6 |
- NEWS |
If two or more “ identical” pr ograms ( same name but different code e.g. BBC1 and BBC1 Scotland ) are found the f ollowing pro grams in the list will be shifted up. (1 - BBC1, 2 - BBC1, 3 - BBC2, 4 -ITV, 5 - CH4, 6 - CH5, 7 - NEWS, ..)
If one of the progr am abo ve is not f ound, the associated program number remains empty
( freq.=467.25 Mhz - Skip selected - no name - system=GB).
example A : 1 - BBC1, 2 - BBC2, 3 - ITV , 4 - ----, 5 - CH5, 6 - NEW S , ...
example B ( if 2 BBC1 found ) : 1 - BBC1, 2 - BBC1, 3 - BBC2, 4 - IT V, 5 - -----, 6 - CH5, 7 -NEWS, ...
- 12 -
Service manual WP 895/895F, CP885/885F
2 - Safety instruction
WARNING: Only competent service personnel may carry out work involving the testing or repair of this equipment.
X-RAY RADIATION PRECAUTION
1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid such hazards, the high voltage must not exceed the specified limit. The nominal value of the high voltage of this receiver is
26 KV (25” - 28”) at max beam curr ent. The high voltage must not, under any circumstances,
exceed 29.5 KV (25") or 30 KV (28"). Each time a receiver requires servicing, the high voltage should be checked. It is important to use an accurate and reliable high voltage meter.
2. The only source of X-RAY Radiation in this TV receiver is the picture tube. For continued X-RAY RADIATION protection, the replacement tube must be exactly the same type tube as specified in the parts list.
SAFETY PRECAUTION
1.Potentials of high voltage are present when this receiver is operating. Operation of the receiver outside the cabinet or with the back board removed involves a shock hazard from the receiver.
1)Servicing should not be attempted by anyone who is not thoroughly familiar with the precautions necessary when working on high voltage equipment.
2)Discharge the high potential of the picture tube before handling the tube. The picture tube is highly evacuated and if broken, glass fragments will be violently expelled.
2.If any Fuse in this TV receiver is blown, replace it with the FUSE specified in the Replacement Parts List.
3.When replacing a high wattage resistor ( metal oxide film resistor) in the circuit board, keep the resistor
10 mm away from circuit board.
4.Keep wires away from high voltage or high temperature components.
5.This receiver must operate under AC 230 volts, 5O Hz. NEVER connect to DC supply or any other power or frequency.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this equipment have special safety-related characteristics.
These characteristics are often passed unnoticed by a visual inspection and the X-RAY RADIATION protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this manual and its supplements, electrical components having such features are identified by designated symbol on the parts list. Before replacing any of these components, read the parts list in this manual carefully. The use of substitutes replacement parts which do not have the same safety characteristics as specified in the parts list may create X-RAY Radiation.
- 13 -
Service manual WP 895/895F, CP885/885F
3 - Alignment instructions
3-1 Microcontroller con figuration : Service mode
To switch the TV set into service mode please see instruction below.
1 - Select pr. number 91
2 - Adjust sharpness to minimum and exit all menu.
3 - Quickly press the key sequence : RED - GREEN - menu
To software version is displayed beside the word Service, e.g. “ SERVICE V1.00A ”.
To exit SERVICE men u press men u key or Std By key.
3-2 Service mode navigation |
|
|||
Pr Up / D own remote keys |
: cycle through the service items availa ble. |
|||
Vol- / + remote keys |
: Decrement / Increment the values within range. |
|||
0~7 digit keys |
: Toggle bits 0~7 in option byte |
|||
|
|
|
|
|
|
Order |
|
Item |
Default settingh for wp 895 |
|
1 |
|
PARABOLA |
+140 |
|
2 |
|
HOR WIDTH |
-1100 |
|
3 |
|
CORNER |
-80 |
|
4 |
|
HOR.PARAL |
-1 |
|
5 |
|
V.LINEAR |
-2 |
|
6 |
|
EW TRAPEZ |
-12 |
|
7 |
|
S CORRECT |
-15 |
|
8 |
|
H BOW |
+100 |
|
9 |
|
VERT SIZE |
+145 |
|
10 |
|
VERT CENT |
+3939 |
|
11 |
|
RED GAIN |
+92 |
|
12 |
|
GRN GAIN |
+87 |
|
13 |
|
BLUE GAIN |
+95 |
|
14 |
|
RED BIAS |
+128 |
|
15 |
|
GRN BIAS |
+128 |
|
16 |
|
HOR CEN |
98 |
|
17 |
|
AGC LEVEL |
- |
|
18 |
|
G2-SCREEN |
- |
|
19 |
|
AFT |
- |
|
20 |
|
OPTION |
- |
|
21 |
|
MAXV OL |
Not used |
- 14 -
Service manual WP 895/895F, CP885/885F
3-3 Microcontroller con figuration : Option bits
These option bits are availa ble from Service mode. First find the OPTION control, and then use keys 0...7 on the remote keypad to control bits 0 to 7 respect ively. The table below shows the options availa ble ;
|
B7 |
B6 |
B5 |
B4 |
B3 |
B2 |
|
B1 |
B0 |
1 |
TOP text |
FASTEXT |
TUBE 4:3 |
X |
X |
SVHS3 |
Tuner options |
|
|
off |
/FLOF off |
disable |
00 |
= Philips |
|
||||
|
|
|
|
01 |
= ALPS |
|
|||
|
TOP text |
FASTEXT |
|
|
|
SVHS3 |
|
||
0 |
TUBE 16:9 |
X |
X |
10 |
= Philips ( AGC intern) |
||||
on |
(FLOF) on |
enable |
11 |
= Not used. |
|
||||
|
|
|
|
|
Set all the unused bits, marked ‘X’, to be 0 for future compatibility.
3-4 TV set Alignment
3-4-1- Local oscillator alignment
Tune a colour bar pattern .The frequency of the signal carrier must be accurate ( Max +/- 10Khz d eviation from the nominal channel frequency).
Find “AFT” item in service mode .
Adjust the coil L150 to bring the cursor to central position : 32.
3-4-2- G2 alignment
-Tune a colour bar pattern.
-Find the “G2 - SCREEN ” item in service mode.
-Adjust screen volume ( on FBT ) to bring the cursor to central position : 32.
3-4-3- White balance
-Select a dark picture and adjust RED BIAS and GRN BIAS to the desired colour temperature.
-Select a bright picture and adjust RED, GRN and BLUE GAIN to the desired colour temperature.
3-4-4- Focus
Adjust the Focus volume ( on FBT ) to have the best resolution on screen.
3-4-5- Vertica l geometry
Adjust V.LINEAR (linear ity), S CORRECT (S. Correction), VERT SIZE (Vertical amplitude), VERT CENT (v ertical cent ring) to compensate for vertical distortion.
- 15 -
Service manual WP 895/895F, CP885/885F
3-4-6- Horizontal picture centring
Adjust HOR CEN(Horizontal center) to have the picture in the center of the screen.
3-4-7- Eau/West comection
Adjust the PARABOLA, HOR WIDTH, CORNER, HOR PARAL, EW TRAPEZ, H BOW, to compensate for geometrical distorrin,
HOR PARAL
H BOW
HOR WIDTH For HOR WIDTH, adjust for 91% overscan.
PARAROLA |
- 16 -
Service manual WP 895/895F, CP885/885F
CORNER
EW TRAPEZ
3-4-8- AGC
-Adjust the antenna signal level at 70 dBV 2
-Tune a colour bar pattern.
-Find the “AGC” item in service mode.
-Adjust AGC volume ( RB10 ) to bring the cursor to central position : 32.
- 17 -
Service manual WP 895/895F, CP885/885F
4 - IC description
4-1 VCT383XA TV signal processor - Teletext decoder with embedded 8 bit- Controller.
4-1-1- Block diagram of the VCT
4-1-2- TV-signal Processor
•Four composite video inputs, two S-VHS inputs
•Analogue YC r C b input
•Composite video monitor
•Multistandard colour decoder ( 1 crystal )
•Multistandard sync decoder
•Black-line detector
•Adaptive 2H comb filter Y/C separator
- 18 -
Service manual WP 895/895F, CP885/885F
•Horizontal scaling ( 0.25 to 4 )
•Panoramavision
•Black-level expander
•Dynamic peaking
•Soft limiter (gamma correction)
•Colour transient improvement
•Programmable RGB matrix
•Analogue RGB/Fastblank input
•Half-contrast switch
•Picture frame generator
•Scan velocity modulation output
•High-performance H/V deflection
•Angle and bow correction
•Separate ADC for tube measurements
•EHT compensation
4-1-3- -Controller
•8-bit, 10-Mhz CPU (65C02)
•96 kB program ROM on chip
•1 kB program RAM on chip
•memory banking
•16-input, 16-level interrupt controller
•patch module for 10 ROM locations
•two 16-bit reloadable timers
•capture compare module
•watchdog timer
•14-bit PWM for voltage synthesis
•Four 8-bit PWMs
•10-bit ADC with 15:1 input MUX
•I2C bus master interface
•24 programmable I/O ports
•80C51 -controller core standard instruction set and timing
•1 s machine cycle
•32-128Kx8-bit late programmed ROM
•3-12Kx8-bit Auxiliary RAM (shared with Display and Acquisition)
•Interrupt controller for individual enable/disable with two level priority
•Two 16-bit Timer/Counter registers
•WatchDog timer
•Auxiliary RAM page pointer
•16-bit Data pointer
•IDLE and Power Down (PD) mode
•14 bits PWM for Voltage Synthesis Tuning
•8-bit A/D converter
•4 pins which can be programmed as general I/O pin, ADC input or PWM (6-bit) output
4-1-4- Teletext Features
•Four programmable video inputs
•Adaptive data slicer
•Signal quality detection
•WST, PDC, VPS, and WSS acquisition
- 19 -
Service manual WP 895/895F, CP885/885F
•High-level command language
•FLOF (Fastext), and TOP support
•10 pages memory on chip (10kB)
4-1-5- Display OSD Features
•3kB OSD RAM on chip
•WST level 1.5 compliant
•WST level 2 parallel attributes
•32 foreground/background colours
•programmable colour look-up table
•1024 mask programmable characters
•17 national languages
•(Latin, Cyrillic and Greek caracter sets)
•Character matrix 10x10
•4-color mode for user font
4-1-6- Audio Features
•Three mono inputs
•Two mono outputs
•Programmable channel select
•Volume control for one mono channel
4-1-7- General Features
•Submicron CMOS technology
•Low-power standby mode
•Single 20.25 MHz crystal
•64-pin PSDIP package
4-1-8- Data Capture
The Video Front End section takes in the analogue Composite Video and Blanking Signal (CVBS), and from this extracts the required data, which is then decoded and stored in memory.
The extraction of the data is performed in the digital domain. The first stage is to select and convert the analogue CVBS signal into a digital form. This is done using 8 bit ADC sampling at 20.25 Mhz.
The digital data services transmitted in the VBI are selected and acquired separately form the video part. This is done by the use of an adaptive data slicer. The following data types can be extracted : 625 line World System Teletext (WST), VPS, WSS. The data is acquired and decoded by the teletext decoder (TPU), then stored in an SRAM lnterface.
4-1-9- Data Capture Features
•Video Signal Quality detector
•Data Capture for 625 line WST
•Data Capture for VPS data (PDC system A)
•Data Capture for Wide Screen Signalling (WSS) bit decoding
•Real-time capture and decoding for WST Teletext in Hardware, to enable optimised microprocessor throughput
•10 page memory stored On-Chip
- 20 -
Service manual WP 895/895F, CP885/885F
•Inventory of transmitted Teletext pages stored in the Page Table
•Signal quality detector for WST data
•Comprehensive Teletext language coverage
•Full Field Vertical Blanking Interval (VBI) data capture of WST data
4-1-10- TV processor version and |
-Controller capacity |
|
|
|
|
|
|||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
IC version |
|
|
|
VCT 3832A |
|
VCT 3834A |
|||
8 bit -controller |
|
|
|
|
|
|
|
|
|
|
|||
ROM size |
|
|
|
|
|
|
|
|
96k |
|
96k |
||
RAM size |
|
|
|
|
|
|
|
|
1k |
|
1k |
||
PAL decoder |
|
|
|
|
|
|
|
|
|
|
|||
SECAM decoder |
|
|
|
|
|
|
|
|
|
|
|||
NTSC decoder |
|
|
|
|
|
|
|
|
|
|
|||
Picture improvement |
|
|
|
|
|
|
|
|
|
||||
Teletext page memory |
|
|
|
|
10 pages |
|
10 pages |
||||||
Adaptive Comb filter |
|
|
|
|
|
X |
|
|
|
||||
Panorama Scaler |
|
|
|
|
|
|
|
|
|
|
|||
4-1-11- IC marking and version |
|
|
|
|
|
|
|
|
|||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Chassis |
|
IC marking |
|
OSD languages |
|
ATSS countries |
|
Text |
|||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
CP885 |
|
|
VCT3832A |
English, French, |
|
GB, France, Germany, |
|
|
|||||
|
|
German, Italian, |
|
Italy, Belgium, Spain, |
|
|
|||||||
|
|
|
|
|
|
|
|
|
|||||
CP885F |
|
VCT3834A |
Spanish, Dutch, |
|
Austria, Poland, |
|
|
||||||
|
Danish, Finnish, |
|
Switzerland, Denmark, |
Pan-European Latin. |
|||||||||
|
|
|
|
|
|
Norwegian, Swedish, |
|
Finland, Netherlands, |
Cyrillic, Greek. |
||||
|
|
|
|
|
|
|
|||||||
WP895F |
|
VCT3834A |
Greek, Polish, |
|
Norway, Sweden, |
|
|
||||||
|
|
|
|
|
|
Hungarian, Czech, |
|
Ireland, Hungary, |
|
|
|||
|
|
|
|
|
|
|
|
|
|||||
WP895 |
|
VCT3834A |
Slovakian, Romanian, |
|
Czech Republic, Others |
|
|
||||||
|
Russian. |
|
|
|
|
|
|||||||
|
|
|
|
|
|
|
|
|
|
|
|||
4-1-12- Pinning |
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
PSDIP |
|
Pin Name |
Type |
|
|
Short Description |
|
|
|||||
64-pin |
|
|
|
|
|
||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
Power |
|
OUT |
|
High = SMPS ON, Low = SMPS in stand by mode. |
|
|
|||||
2 |
|
AGC |
|
IN |
|
For service only, tuner AGC, TOP alignment. |
|
|
|||||
3 |
|
VSUPP1 |
SUPPLY |
Supply Voltage, Port ( pin 1, 2, 5, 6, 7, 8, 9, 10, 61, 62, 63, 64). |
|
||||||||
4 |
|
GNDP1 |
|
SUPPLY |
Ground, Port. |
|
|
|
|
|
|||
5 |
|
MOD_SW |
OUT |
|
High = Negative modulation, Low = Positive modulation (L/L’). |
|
|||||||
6 |
|
SECAM L/L’ |
OUT |
|
High = L’, Low = L. |
|
|
|
|
|
|||
7 |
|
AFC |
|
IN |
|
|
|
|
|
|
|
|
|
8 |
|
IR |
|
IN |
|
|
|
|
|
|
|
|
|
9 |
|
SC1.SW |
IN |
|
|
|
|
|
|
|
|
||
10 |
|
SC2.SW |
IN |
|
|
|
|
|
|
|
|
||
11 |
|
VOUT |
|
OUT |
|
Analog Video Output |
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|||||
12 |
|
VRT |
|
IN |
|
Reference Voltage Top, Video ADC |
|
|
|||||
13 |
|
SGND |
|
IN |
|
Signal Ground for Analog Input |
|
|
- 21 -
Service manual WP 895/895F, CP885/885F
PSDIP |
Pin Name |
Type |
Short Description |
|
64-pin |
||||
|
|
|
||
14 |
GNDAF |
SUPPLY |
Ground, Analog Front-end |
|
15 |
VSUPAF |
SUPPLY |
Supply Voltage, Analog Front-end |
|
16 |
CBIN |
IN |
Analog Component Cb Input |
|
17 |
CIN1 |
IN |
Analog Chroma 1 Input |
|
18 |
CIN2/CRIN |
IN |
Analog Chroma 2 Input / Analog Component Cr Input |
|
19 |
VIN1 |
IN |
Analog Video 1 Input |
|
20 |
VIN2 |
IN |
Analog Video 2 Input |
|
21 |
VIN3 |
IN |
Analog Video 3 Input |
|
22 |
VIN4 |
IN |
Analog Video 4 Input |
|
23 |
TEST |
IN |
Test Pin, Reserved For Test |
|
24 |
HOUT |
OUT |
Horizontal Drive Output |
|
|
|
|
|
|
25 |
VSUPD |
SUPPLY |
Supply Voltage, Digital Circuitry |
|
26 |
GNDD |
SUPPLY |
Ground, Digital Circuitry |
|
27 |
FBLIN |
IN |
Fast Blank Input |
|
28 |
RIN |
IN |
Analog Red Input |
|
29 |
GIN |
IN |
Analog Green Input |
|
30 |
BIN |
IN |
Analog Blue Input |
|
31 |
VPROT |
IN |
Vertical Protection Input |
|
32 |
SAFETY |
IN |
Safety Input |
|
33 |
HFLB |
IN |
Horizontal Flyback Input |
|
34 |
VERTQ/ INTLC |
OUT |
Differential Vertical Sawtooth Output Interlace Control Output |
|
35 |
VERT |
OUT |
Differential Vertical Sawtooth Output |
|
36 |
EW |
OUT |
Vertical Parabola Output |
|
37 |
SENSE |
IN |
Sense ADC Input |
|
38 |
GNDM |
SUPPLY |
Ground, MADC Input |
|
39 |
RSW1 |
OUT |
Range Switch1 for Measurement ADC |
|
|
|
|
|
|
40 |
RSW2 |
OUT |
Range Switch2 for Measurement ADC |
|
41 |
SVMOUT |
OUT |
Scan Velocity Modulation Output |
|
42 |
ROUT |
OUT |
Analog Red Output |
|
43 |
GOUT |
OUT |
Analog Green Output |
|
44 |
BOUT |
OUT |
Analog Blue Output |
|
45 |
VSUPAB |
SUPPLY |
Supply Voltage, Analog Back-end |
|
46 |
GNDAB |
SUPPLY |
Ground, Analog Back-end |
|
47 |
VRD |
IN |
DAC Reference |
|
48 |
XREF |
IN |
Reference Input for RGB DACs |
|
49 |
AIN3 |
IN |
Analog Audio 3 Input |
|
50 |
AIN2 |
IN |
Analog Audio 2 Input |
|
51 |
AIN1 |
IN |
Analog Audio 1 Input |
|
52 |
AOUT2 |
OUT |
Analog Audio 2 Output |
|
53 |
AOUT1 |
OUT |
Analog Audio 1 Output |
|
54 |
VSUPS |
SUPPLY |
Supply Voltage, Standby |
|
55 |
GNDS |
SUPPLY |
Ground, Standby |
|
56 |
XTAL1 |
IN |
Analog Crystal Input |
|
57 |
XTAL2 |
OUT |
Analog Crystal Output |
|
58 |
RESQ |
IN/OUT |
Reset Input/Output, Active Low |
|
59 |
SCL |
IN/OUT |
I 2 C Bus Clock |
|
60 |
SDA |
IN/OUT |
I 2 C Bus Data |
|
61 |
Mute |
OUT |
High = Mute active |
|
|
|
|
|
|
62 |
LED |
OUT |
High = Green, Low = Red |
|
63 |
KB |
IN |
Local keyboard ADC input |
|
64 |
OCP |
IN |
Over Current Protection input |
- 22 -
Service manual WP 895/895F, CP885/885F
1Power
2AGC
3S/B 5V
4Gnd
5MOD SW
6SECAM L’
7AFC/RES
8IR
9SC1 SW
10SC2 SW
11Vout
12VRT
13SGND
14GND
155V
16Cb in
17C in
18Cr in
19IF-IN
20SC1-IN
21SC2-IN
22RCA VIN
23TEST
24H out
253.3 V
26GND
27FBLIN
28Rin
29Gin
30Bin
31VPROT
32SAFETY
VCT 383X
64 |
OCP |
63 |
KB |
62 |
LED |
|
MUTE |
61 |
|
60 |
SDA |
59 |
SCL |
|
RESET |
58 |
|
|
XTAL in |
57 |
|
|
OSC GND |
56 |
|
|
GND |
55 |
|
|
S/B 3.3V |
54 |
|
|
|
53 |
|
|
|
52 |
|
|
GND |
51 |
|
|
GND |
50 |
|
|
GND |
49 |
|
|
XREF |
48 |
|
|
VRD |
47 |
|
|
GND |
46 |
|
|
5V |
45 |
|
|
B out |
44 |
|
|
G out |
43 |
|
|
R out |
42 |
|
41 |
SVM out |
40 |
RSW2 |
39 |
RSW1 |
38 |
GND |
37 |
SENSE |
36 |
EW |
35 |
VERTQ |
34 |
VERT |
33 |
HFLB |
|
|
- 23 -
Service manual WP 895/895F, CP885/885F
4-2 MSP341x Multistandard Sound Processor
The MSP 341x is designed as a single-chip Multistandard Sound Processor for applications in analogue and digital TV sets, video recorders, and PC cards.
The MSP3411 has all functions of MSP3410 with the addition of a virtual surround sound feature. A Surround sound affect can be rproduced with two loudspeakers. The MSP3411 includes virtualizer
algorithm “3D Panorama” which has been approved by the Dolby laboratories for compliance with the “Virtual Dolby Surround” technology. In addition, the MSP3411 includes Micronas “Panorama” algorithm.
MSP 341x features :
-sound IF input
-No external filters required
-Stereo baseband input via integrated AD converters
-Two pairs of DA converters
-Two carrier FM or NICAM processing
-AVC : Automatic Volume Correction
-Bass, treble, volume processing
-Full SCART in/out matrix without restrictions
-Improved FM-identification
-Demodulator short programming
-Autodetection for terrestrial TV - sound standards
-Precise bit-error rate indication
-Automatic switching from NICAM to FM/AM or vice versa
-Improved NICAM synchronisation algorithm
-Improved carrier mute algorithm
-Improved AM-demodulation
-Reduction of necessary controlling
-Less external components
4-2-1- Basic Features of the MSP 341x
4-2-1-1 Demodulator and NICAM Decoder Section
The MSP 341x is designed to simultaneously perform digital demodulation and decoding of NICAM-coded TV stereo sound, as well as demodulation of FM or AM mono TV sound. Alternatively, two carrier FM systems according to the German terrestrial specs can be processed with the MSP 341x.
The MSP 341x facilitates profitable multistandard capability, offering the following advantages:
-Automatic Gain Control (AGC) for analogue input: input range: 0.10 - 3 Vpp
-integrated A/D converter for sound-IF input
-all demodulation and filtering is performed on chip and is individually programmable
-easy realisation of all digital NICAM standards (B/G, I, L and D/K)
-FM-demodulation of all terrestrial standards (include identification decoding)
-no external filter hardware is required
-only one crystal clock (18.432 MHz) is necessary
- 24 -
Service manual WP 895/895F, CP885/885F
- high deviation FM-mono mode (max. deviation: approx. ±360 kHz)
4-2-1-2 DSP-Section (Audio Baseband Processing)
-flexible selection of audio sources to be processed
-performance of terrestrial de-emphasise systems (FM, NICAM)
-digitally performed FM-identification decoding and de-matrixing
-digital baseband processing: volume, bass, treble
-simple controlling of volume, bass, treble
4-2-1-3 Analogue Section
-two selectable analogue pairs of audio baseband input (= two SCART inputs) input level: <2 V RMS, input impedance: >25
-one selectable analogue mono input (i.e. AM sound): Not used in this chassis
-two high-quality A/D converters, S/N-Ratio: >85 dB
-20 Hz to 20 kHz bandwidth for SCART-to-SCART copy facilities
-loudspeaker: one pair of four-fold oversampled D/A converters. Output level per channel:
max. 1.4 VRMS output resistance: max. 5 . S/N-ratio: >85 dB at maximum volume Max. noise voltage in mute mode: < 10 V (BW: 20 Hz... 16kHz)
- one pair of four-fold oversampled D/A converters supplying a pair of SCART-outputs.
output level per channel: max. 2 V RMS, output resistance: max. 0.5 , S/N-Ratio: >85 dB (20 Hz... 16 kHz)
4-2-1-4 NICAM plus FM/AM-Mono
According to the British, Scandinavian, Spanish, and French TV-standards, high-quality stereo sound is transmitted digitally. The systems allow two high-quality digital sound channels to be added to the already existing FM/AM-channel. The sound coding follows the format of the so-called Near Instantaneous Companding System (NICAM 728). Transmission is performed using Differential Quadrature Phase Shift Keying (DQPSK. Table below offers an overview of the modulation parameters.)
In the case of NICAM/FM (AM) mode, there are three different audio channels available: NICAM A, NICAM B, and FM/AM-mono. NICAM A and B may belong either to a stereo or to a dual language transmission. Information about operation mode and about the quality of the NICAM signal can be read by the controlling software via the control bus. In the case of low quality (high bit error rate), the controlling software may decide to switch to the analogue FM/AMmono sound. Alternatively, an automatic NICAM-FM/AM switching may be applied.
4-2-1-5 German 2-Carrier System (DUAL FM System)
Since September 1981, stereo and dual sound programs have been transmitted in Germany using the 2-carrier system. Sound transmission consists of the already existing first sound carrier and a second sound carrier additionally containing an identification signal. More details of this standard are given in Tables below. For D/K very similar system is used.
- 25 -