Casio tv3 Schematic
Basic Information for Casio Pocket Television
Vol.3 CIRCUIT OPERATION |
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Contents |
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PAGE |
TELEVISION TRANSMISSION SYSTEM ........................................................... |
1 |
Color System .................................................................................................... |
1 |
TV System ........................................................................................................ |
1 |
Channel System ................................................................................................ |
1 |
Details of Color System .................................................................................... |
2 |
Details of TV System ........................................................................................ |
2 |
Details of TV Channel ...................................................................................... |
3 |
World TV Broadcast System ............................................................................ |
5 |
Casio TV Model ................................................................................................ |
6 |
BLOCK DIAGRAM .............................................................................................. |
7 |
VHF, UHF ......................................................................................................... |
7 |
Rod Antenna .................................................................................................... |
7 |
PCB Ass'y ........................................................................................................ |
8 |
Display Ass'y .................................................................................................... |
8 |
AD PCB ............................................................................................................ |
9 |
Back Light ........................................................................................................ |
9 |
Power Supply ................................................................................................... |
9 |
CIRCUIT OPERATION ....................................................................................... |
11 |
Tuner ................................................................................................................ |
11 |
IC200 ............................................................................................................... |
12 |
IC300 ................................................................................................................ |
13 |
IC400 ................................................................................................................ |
16 |
IC700 ................................................................................................................ |
17 |
Tuning Operation .............................................................................................. |
18 |
Adjustment ....................................................................................................... |
19 |
Troubleshooting ............................................................................................... |
20 |
Trouble example .............................................................................................. |
28 |
SCHEMATIC DIAGRAM & WAVEFORMS ......................................................... |
29 |
Waveforms ...................................................................................................... |
32 |
INDEX
TELEVISION TRANSMISSION S Y S T E M
T h r e e Systems
TV transmission systems are not the same throughout the world: Color system, TV system and Channel are different. The countries for which a particular model is suitable are indicated in the sales literature and instruction booklet supplied, and are printed on the box in which each television is packed.
Color system
There are three color transmission systems in the world: NTSC, PAL and SECAM.
If the color systems are different, TV does not get in color.
e.g.
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Color System |
TV System |
Channel System |
Brazil |
PAL |
M/M |
US |
U.S.A. |
NTSC |
M/M |
US |
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Color System |
TV System |
Channel System |
Saudi Arabia |
SECAM |
B/G,H |
CCIR |
Germany |
PAL |
B/G,H |
CCIR |
T V System
There are fourteen TV systems in the world: From A to N. Each system is different from scanning line, sound frequency and modulation system.
If the TV systems are different, TV does not get a picture and a sound. TV systems are indicated in the rating plate on the lower case.
e.g.
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Color System |
TV System |
Channel System |
Brazil |
PAL |
M/M |
US |
Argentina |
PAL |
N/N |
US |
Channel System
If the channel (TV frequency) is different, TV can not get the local channel.
e.g.
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Japan |
U.S.A. |
Color System |
NTSC |
NTSC |
TV System |
M/M |
M/M |
Channel |
Japan |
US |
1ch |
91.25MHz |
- |
2ch |
97.25MHz |
55.25MHz |
3ch |
103.25MHz |
61.25MHz |
4ch |
171.25MHz |
67.25MHz |
It is n o t possible t o convert it t o work i n any country o t h e r t h a n t h e o n e for which it is d e s i g n e d .
-1-
Details of Color System |
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System |
NTSC |
PAL |
SECAM |
NTSC: A 525-line 60-field color television system |
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(Germany) |
(France) |
originally developed in the USA. |
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Scanning lines |
525 |
625 |
625 |
The 3.58MHz sub carrier is used to |
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transmit color information. |
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Field frequency (MHz) |
59.94 |
50 |
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50 |
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PAL: A 625-line 50-field color television system |
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Interlacing ration |
2 : 1 |
2 : 1 |
2 : 1 |
originally developed in West Germany. |
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PAL is improved about the phase distortion |
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Aspect ration |
4 : 3 |
4 : 3 |
4 : 3 |
of NTSC. PAL is basically the same as |
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NTSC. But PAL is different from NTSC in |
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Line frequency (MHz) |
15.734 |
15.625 |
15.625 |
the way of the color signal transmission. |
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The phase of B-Y signal is fixed 90 degree. |
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Channel bandwidth(MHz) |
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6 |
8 |
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The phase of R-Y signal changes at 0 and |
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180 degree on every horizontal scanning |
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Luminance signal(MHz) |
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4.2 |
5 |
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line. The influence of the phase distortion is |
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denied by this way. |
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Color signal (MHz) |
I |
1.5 |
R-Y |
1.3 |
R-Y |
1.3 |
The 4.43MHz sub carrier is used to transmit |
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Q |
0.5 |
B-Y |
1.3 |
B-Y |
1.3 |
color information. |
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Sound carrier-frequency |
+4.5 |
+5.5 |
+6.5 |
SECAM: A 625-line 50-field color television |
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(MHz) |
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system originally developed in France. |
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Video Modulation |
AM negative |
AM negative |
AM positive |
Sub carrier frequency is different from |
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every lines, R-Y signal:4.40MHz, B-Y |
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Sound modulation |
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FM |
FM |
AM |
signal 4.25MHz, the phase of sub |
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carrier changes over beginning of |
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scanning lines. The merit of SECAM is |
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strong about phase jitters, and have not |
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cross talk both of two color signals. |
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Details of TV System |
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System |
CCIR |
Belgium |
OIRT(1) |
France |
Luxembourg |
CCIR |
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(VHF) |
(VHF) |
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Broadcast System |
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B |
C |
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D |
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E |
F |
G,H |
Scanning line |
625 |
625 |
625 |
819 |
819 |
625 |
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Channel bandwidth |
7 MHz |
7 MHz |
8 MHz |
14 MHz |
7 MHz |
8 MHz |
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fs(audio) - fv(video) |
+5.5MHz |
+5.5MHz |
+6.5MHz |
+11.5MHz |
+5.5MHz |
+5.5MHz |
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Audio modulation |
F3(+/-50kHz) |
A3 |
F3(+/-50kHz) |
A3 |
A3 |
F3(+/-50kHz) |
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System |
UK(UHF), |
OIRT(2) |
France |
USA |
USA 625 |
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Ireland |
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(UHF) |
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Broadcast System |
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I |
K,K1 |
L |
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M |
N |
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Scanning line |
625 |
625 |
625 |
525 |
625 |
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Channel bandwidth |
8 MHz |
8 MHz |
8 MHz |
6 MHz |
6 MHz |
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fs(audio) - fv(video) |
+6.0MHz |
+6.5MHz |
+6.5MHz |
+4.5MHz |
+4.5MHz |
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Audio modulation |
F3(+/-50kHz) |
F3(+/-50kHz) |
A3 |
F3(+/-25kHz) |
F3(+/-25kHz) |
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A3: AM |
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CCIR: |
International |
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OIRT Organization |
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F3: FM |
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Radio |
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International de |
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Consultative |
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Radio diffusion |
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Committee |
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Television |
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- 2 -
Details o f T V Channel
1 ) T V Channel
In the United States, the low band of television stations occupies the frequency range 54 - 88MHz, with a small gap of 4MHz between channel 4 and 5. (This band - 72 to 76MHz - is used by other services.) Between the low-band and the high band stations there is a frequency space (88 - 174MHz) that is occupied by FM broadcasting and government and aircraft communications services.
Channel 14, the first of UHF channels, occupies the band 470 - 476MHz, channel 15, 476 - 482MHz, channel 16, 482 - 488MHz, and so on, all the way up to 890MHz. Within this band, 470 - 890MHz (a total of 420MHz),70 television channels are accommodated. Like the UHF allocations, each UHF television channel is 6MHz wide.
Japan VHF Channel
CH.NO. Video Frequency |
Sound Frequency |
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IF |
58.75MHz |
54.25MHz |
1 |
91.25MHz |
95.75MHz |
2 |
97.25MHz |
101.75MHz |
3 |
103.25MHz |
107.75MHz |
4 |
171.25MHz |
175.75MHz |
5 |
177.25MHz |
181.75MHz |
6 |
183.25MHz |
187.75MHz |
7 |
189.25MHz |
193.75MHz |
8 |
193.25MHz |
197.75MHz |
9 |
199.25MHz |
203.75MHz |
10 |
205.25MHz |
209.75MHz |
11 |
211.25MHz |
215.75MHz |
12 |
217.25MHz |
221.75MHz |
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fs - fv=4.5MHz |
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CCIR VHF Channel
CH.NO. Video Frequency |
Sound Frequency |
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IF |
38.90MHz |
33.40MHz |
1 |
41.25MHz |
46.75MHz |
2 |
48.25MHz |
53.75MHz |
3 |
55.25MHz |
60.75MHz |
4 |
62.25MHz |
67.75MHz |
5 |
175.25MHz |
180.75MHz |
6 |
182.25MHz |
187.75MHz |
7 |
189.25MHz |
194.75MHz |
8 |
196.25MHz |
201.75MHz |
9 |
203.25MHz |
208.75MHz |
10 |
210.25MHz |
215.75MHz |
11 |
217.25MHz |
222.75MHz |
12 |
224.25MHz |
229.75MHz |
US VHF Channel
CH.NO. Video Frequency |
Sound Frequency |
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IF |
45.75MHz |
41.25MHz |
2 |
55.25MHz |
59.75MHz |
3 |
61.25MHz |
65.75MHz |
4 |
67.25Mhz |
71.75MHz |
5 |
77.25MHz |
81.75MHz |
6 |
83.25MHz |
87.75MHz |
7 |
175.25MHz |
179.75MHz |
8 |
181.25MHz |
185.75MHz |
9 |
187.25MHz |
191.75MHz |
10 |
193.25MHz |
197.75MHz |
11 |
199.25MHz |
203.75MHz |
12 |
205.25Mhz |
209.75MHz |
13 |
211.25MHz |
215.75MHz |
fs - fv=4.5MHz
fs - fv=5.5MHz
-3-
2) Channel System and Frequencies
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VHF (MHz) |
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UHF (MHz) |
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2ch |
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4ch |
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5ch |
12ch |
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21ch |
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69ch |
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C.C.I.R |
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175.25 |
224.25 |
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471.25 |
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855.25 |
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48.25 |
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62.25 |
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13ch |
24ch 25ch |
57ch |
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1ch |
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6ch |
12ch |
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China |
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49.75 |
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85.25 |
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168.25 |
216.25 |
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471.25 |
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863.25 |
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21ch |
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69ch |
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4ch |
12ch |
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F.O.T. |
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175.25 |
215.25 |
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471.25 |
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855.25 |
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1ch |
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12ch |
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21ch |
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O.I.R.T |
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49.75 |
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93.25 |
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175.25 |
223.25 |
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471.25 |
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Italy |
Ach |
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Cch |
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Dch |
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H2ch |
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21ch |
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69ch |
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53.75 |
82.75 |
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175.25 |
224.25 |
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471.25 |
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Angola |
1ch |
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3ch |
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4ch |
10ch |
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21ch |
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69ch |
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43.25 |
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60.25 |
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175.25 |
223.25 |
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471.25 |
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855.25 |
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0ch |
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5ch |
5Ach |
11ch |
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28ch |
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69ch |
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Australia |
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46.25 |
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102.25 |
138.25 |
216.25 |
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527.25 |
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814.25 |
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Ach |
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Dch |
Ich |
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21ch |
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Ireland |
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45.75 |
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61.75 |
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175.25 |
215.25 |
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471.25 |
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855.25 |
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4ch |
10ch |
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21ch |
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69ch |
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Morocco |
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163.25 |
211.15 |
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471.25 |
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855.25 |
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1ch |
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3ch |
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21ch |
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69ch |
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4ch |
9ch |
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New Zealand |
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45.25 |
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62.25 |
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175.25 |
210.25 |
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471.25 |
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855.25 |
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4ch |
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12ch |
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21ch |
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69ch |
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South Africa |
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175.25 |
247.25 |
|
471.25 |
|
855.25 |
|||||||||||||
-4-
World TV Broadcast System
|
EUROPE |
|
|
|
|
AFRICA |
|
|
|
|
ASIA |
|
|
|
|
COUNTRY |
Broadcast System |
Color |
Casio |
COUNTRY |
Broadcast System |
Color |
Casio |
COUNTRY |
Broadcast System |
Color |
Casio |
||||
|
VHF |
UHF |
System |
Model |
|
VHF |
UHF |
System |
Model |
|
VHF |
|
UHF |
System |
Model |
Albania |
B |
G |
PAL |
I |
Zaire |
K1 |
- |
SECAM |
W |
Vietnam |
D/M |
|
- |
SECAM |
F |
Austria |
B |
G |
PAL |
C |
Zambia |
B |
- |
PAL |
C |
NEAR & MIDDLE EAST |
|
|
|||
Belgium |
B |
H |
PAL |
C |
|
AMERICA |
|
|
|
Afghanistan |
B |
|
- |
PAL |
C |
Bulgaria |
D |
K |
SECAM |
W |
Argentina |
N |
- |
PAL |
H |
Bahrain |
B |
|
- |
PAL |
C |
Czechoslovakia |
D |
K |
SECAM |
W |
Barbados |
M |
- |
NTSC |
B |
Cyprus |
B |
|
G |
SECAM |
F |
Denmark |
B |
G |
PAL |
C |
Bermuda |
M |
- |
NTSC |
B |
Iran |
B |
|
- |
SECAM |
F |
Germany |
B |
G |
PAL |
N |
Bolivia |
M |
- |
NTSC |
B |
Iraq |
B |
|
- |
SECAM |
F |
Finland |
B |
G |
PAL |
C |
Brazil |
M |
M |
PAL |
G |
Israel |
B |
|
G |
PAL |
C |
France |
E/L |
L |
SECAM |
J |
Canada |
M |
M |
NTSC |
K |
Jordan |
B |
|
G/H |
PAL |
C |
Gibraltar |
B |
G |
PAL |
C |
Chile |
M |
- |
NTSC |
B |
Kuwait |
B |
|
- |
PAL |
C |
Greece |
B |
G |
SECAM |
F |
Colombia |
M |
- |
NTSC |
B |
Lebanon |
B |
|
- |
SECAM |
F |
Holland |
B |
G |
PAL |
C |
Costa Rica |
M |
- |
NTSC |
B |
Oman |
B |
|
G |
PAL |
C |
Hungary |
D |
K |
SECAM |
W |
Cuba |
M |
- |
NTSC |
B |
Qatar |
B |
|
- |
PAL |
C |
Iceland |
B |
G |
PAL |
C |
Dominica |
M |
- |
NTSC |
B |
Saudi Arabia |
B |
|
G |
SECAM |
F |
Ireland |
A/I |
I |
PAL |
Y |
Ecuador |
M |
- |
NTSC |
B |
Syria |
B |
|
- |
SECAM |
F |
Italy |
B |
G |
PAL |
I |
El Salvador |
M |
- |
NTSC |
B |
Turkey |
B |
|
- |
PAL |
C |
Luxembourg |
B |
G |
PAL |
C |
Guadeloupe |
K1 |
- |
SECAM |
W |
United Arab Emirates |
B |
|
- |
PAL |
C |
Malta |
B |
H |
PAL |
C |
Guatemala |
M |
- |
NTSC |
B |
Yemen |
B |
|
- |
PAL |
C |
Monaco |
G |
L/G |
SECAM/PAL |
- |
Guyana |
K1 |
- |
SECAM |
W |
|
OCEANIA |
|
|
|
|
Norway |
B |
G |
PAL |
C |
Haiti |
M |
- |
NTSC |
B |
American Samoa |
M |
|
- |
NTSC |
B |
Poland |
D |
K |
SECAM |
W |
Hawaiian IS. |
M |
- |
NTSC |
B |
Australia |
B |
|
G |
PAL |
M |
Portugal |
B |
G |
PAL |
C |
Honduras |
M |
- |
NTSC |
B |
Guam |
M |
|
- |
NTSC |
B |
Romania |
D |
K |
PAL |
W |
Jamaica |
M |
- |
NTSC |
B |
New Caledonia |
K1 |
|
- |
SECAM |
W |
San Marino |
B |
G |
PAL |
I |
Mexico |
M |
M |
NTSC |
B |
New Zealand |
B |
|
- |
PAL |
C |
Spain |
B |
G |
PAL |
C |
Nicaragua |
M |
- |
NTSC |
B |
Tahiti |
K1 |
|
- |
SECAM |
W |
Sweden |
B |
G |
PAL |
C |
Panama |
M |
- |
NTSC |
B |
|
|
|
|
|
|
Switzerland |
B |
G |
PAL |
C |
Paraguay |
N |
- |
PAL |
H |
|
|
|
|
|
|
UK |
- |
I |
PAL |
D |
Peru |
M |
- |
NTSC |
B |
|
|
|
|
|
|
USSR |
D |
K |
SECAM |
W |
Puerto Rico |
M |
M |
NTSC |
B |
|
|
|
|
|
|
Yugoslavia |
B |
G |
PAL |
C |
ST. Kitts-Nevis |
M |
- |
NTSC |
B |
|
|
|
|
|
|
|
AFRICA |
|
|
|
Surinam |
M |
- |
NTSC |
B |
|
|
|
|
|
|
Algeria |
B |
- |
PAL |
C |
Trinidad & Tobago |
M |
- |
NTSC |
B |
|
|
|
|
|
|
Burkina Faso |
K1 |
- |
SECAM |
W |
Uruguay |
N |
- |
PAL |
H |
|
|
|
|
|
|
Canary IS. |
B |
G |
PAL |
C |
USA |
M |
M |
NTSC |
B |
|
|
|
|
|
|
Congo |
D |
- |
SECAM |
W |
Virgin IS. |
M |
- |
NTSC |
B |
|
|
|
|
|
|
Cote D'ivoire |
K1 |
- |
SECAM |
W |
Venezuela |
M |
- |
NTSC |
B |
|
|
|
|
|
|
Djibouti |
K1 |
- |
SECAM |
W |
|
ASIA |
|
|
|
|
|
|
|
|
|
Egypt |
B |
- |
PAL |
C |
Brunei |
B |
- |
PAL |
C |
|
|
|
|
|
|
Ethiopia |
B |
- |
PAL |
C |
Cambodia |
M |
- |
NTSC |
B |
|
|
|
|
|
|
Gabon |
K1 |
- |
SECAM |
W |
China |
D |
D |
PAL |
E |
|
|
|
|
|
|
Ghana |
B |
- |
PAL |
C |
Democratic People's |
D |
- |
PAL |
E |
|
|
|
|
|
|
Kenya |
B |
- |
PAL |
C |
Republic of Korea |
|
|
|
|
|
|
|
|
|
|
Liberia |
B |
- |
PAL |
C |
Hong Kong |
- |
I |
PAL |
D |
|
|
|
|
|
|
Libya |
B |
- |
SECAM |
F |
India |
B |
- |
PAL |
C |
|
|
|
|
|
|
Madagascar |
K1 |
- |
SECAM |
W |
Indonesia |
B |
G |
PAL |
C |
|
|
|
|
|
|
Morocco |
B |
- |
SECAM |
F |
Japan |
M |
M |
NTSC |
A |
|
|
|
|
|
|
Niger |
K1 |
- |
SECAM |
W |
Malaysia |
B |
- |
PAL |
C |
|
|
|
|
|
|
Nigeria |
B |
G |
PAL |
C |
Mongolia |
D |
- |
SECAM |
W |
|
|
|
|
|
|
Senegal |
K1 |
- |
SECAM |
W |
Pakistan |
B |
- |
PAL |
C |
|
|
|
|
|
|
Sierra Leone |
B |
- |
PAL |
C |
Philippines |
M |
M |
NTSC |
B |
|
|
|
|
|
|
Sudan |
B |
- |
PAL |
C |
Republic of Korea |
M |
M |
NTSC |
B |
|
|
|
|
|
|
South Africa |
I |
I |
PAL |
*Y |
Singapore |
B |
- |
PAL |
C |
|
|
|
|
|
|
Tanzania |
B/I |
I |
PAL |
C |
Sri Lanka |
B |
- |
PAL |
C |
|
|
|
|
|
|
Tunisia |
B |
- |
SECAM |
F |
Taiwan |
M |
M |
NTSC |
B |
|
|
|
|
|
|
Uganda |
B |
|
PAL |
F |
Thailand |
B |
- |
PAL |
C |
|
|
|
|
|
|
-5-
Casio TV Model
Casio |
Color |
TV |
Channel |
Country |
Scanning |
fs(audio)-fv(video) |
Color burst |
Notes |
Model |
System |
System |
|
|
line |
|
|
|
A |
NTSC |
M/M |
JPN |
Japan |
525 |
4.5MHz |
3.58MHz |
|
B |
NTSC |
M/M |
US |
American Samoa / Antigua and Barbuda / Bahamas / Barbados / |
525 |
4.5MHz |
3.58MHz |
|
|
|
|
|
Belize / Bermuda / Bolivia /Cambodia / Chile / Colombia / |
|
|
|
|
|
|
|
|
Costa Rica / Cuba / Dominican Republic / Ecuador / El Salvador / |
|
|
|
|
|
|
|
|
Guatemala / Haiti / Honduras / Jamaica / Mexico / Micronesia / |
|
|
|
|
|
|
|
|
Netherlands Antilles / Nicaragua / Panama / Peru / Philippines / |
|
|
|
|
|
|
|
|
Puerto Rico / Saint Christopher & Nevis / Saint Lucia / |
|
|
|
|
|
|
|
|
South Korea / Surinam / Taiwan / Trinidad and Tobago / |
|
|
|
|
|
|
|
|
Union of Myanmar / U.S.A. / Venezuela |
|
|
|
|
C |
PAL |
B/G,H |
CCIR |
Afghanistan / Algeria / Austria / Bahrain / Bangladesh / Belgium / |
625 |
5.5MHz |
4.43MHz |
|
|
|
|
|
Brunei / Central African Republic / Equatorial Guinea / Ethiopia / |
|
|
|
|
|
|
|
|
Ghana /Greenland / Holland / Iceland / India / Indonesia / |
|
|
|
|
|
|
|
|
Jordan / Kenya / Kuwait / Liberia / Luxembourg / Malaysia / |
|
|
|
|
|
|
|
|
Maldives / Malta / Mozambique / New Zealand / Nigeria / Oman / |
|
|
|
|
|
|
|
|
Pakistan / Portugal / Qatar / Seychelles / Sierra Leone / |
|
|
|
|
|
|
|
|
Singapore / Spain / Pakistan / Portugal / Qatar / Seychelles / |
|
|
|
|
|
|
|
|
Sierra Leone / Singapore / Spain / Sri Lanka / Sudan / Swaziland / |
|
|
|
|
|
|
|
|
Switzerland / Tanzania / Thailand / The Yemen Arab Republic / |
|
|
|
|
|
|
|
|
Turkey / United Arab Emirates / Yugoslavia / Zambia |
|
|
|
|
|
|
|
|
*Australia (except VHF CH 3-5A) |
|
|
|
|
D |
PAL |
-/I |
UK |
Hong Kong / UK |
625 |
6 MHz |
4.43MHz |
|
E |
PAL |
D/I |
China/UK |
Democratic People's Republic of Korea / China / Hong Kong |
625 |
6.5 MHz / 6 MHz |
4.43MHz |
|
F |
PAL/SECAM |
B/G,H |
CCIR |
Cyprus / East Germany / Egypt / Greece / Iran / Iraq / Lebanon / |
625 |
5.5 MHz |
4.25/4.40MHZ |
|
|
|
|
|
Libya / Mauritania / Mauritius / Morocco / Saudi Arabia / Syria / |
|
|
|
|
|
|
|
|
Tunisia / Uganda / Vietnam / Zimbabwe |
|
|
|
|
|
|
|
|
* plus Casio Model CA |
|
|
|
|
G |
PAL |
M/M |
US |
Brazil / Lao People's Democratic Republic |
525 |
4.5 MHz |
3.58MHz |
|
H |
PAL |
N/N |
US |
Argentina / Paraguay / Uruguay |
625 |
5.5 MHz |
3.58MHz |
|
I |
PAL |
B/G |
ITALY |
Italy / Albania / San Marino |
626 |
5.5 MHz |
4.43MHz |
|
J |
SECAM |
L/L |
France |
France |
625 |
6.5 MHz |
4.25/4.40MHz |
|
K |
NTSC |
M/M |
US |
Canada *plus Casio Model BA |
525 |
4.5 MHz |
3.58MHz |
|
L |
PAL |
B/G,H |
CCIR |
Denmark / Finland / Norway / Sweden *plus Casio Model CA |
625 |
5.5 MHz |
4.43MHz |
|
M |
PAL |
B/B |
Australia |
Australia *plus Casio Model CA |
625 |
5.5 MHz |
4.43MHz |
|
N |
PAL |
B/G,H |
CCIR |
West Germany *plus Casio Model CA |
625 |
5.5 MHz |
4.43MHz |
|
P |
PAL |
B/G,H,I |
CCIR/UK |
Casio Model LA plus DA |
625 |
5.5 MHz / 6MHz |
4.43MHz |
|
Q |
PAL |
B/G,H,I |
CCIR/UK |
Casio Model NA plus DA |
625 |
5.5 MHz / 6MHz |
4.43MHz |
|
R |
PAL |
B/G,H,I |
Italy/UK |
Casio Model IA plus CA plus DA |
625 |
5.5 MHz / 6MHz |
4.43MHz |
|
S |
PAL |
B/G,H |
Australia |
*Australia (except VHF CH 0 and 3-5A) |
625 |
5.5MHz |
4.43MHz |
Selector: I |
|
PAL |
B/G,H |
CCIR |
Casio Model CA |
625 |
5.5MHz |
|
|
|
PAL |
B/G,H |
ITALY |
Albania, Italy |
625 |
5.5MHz |
|
|
|
PAL |
B/G,H |
New Zealand |
New Zealand (except VHF CH 1) |
625 |
5.5MHz |
|
|
|
SECAM |
B/G,H |
CCIR |
Casio Model FA |
625 |
5.5MHz |
4.25/4.40MHz |
|
|
SECAM |
B/G,H |
Morocco |
Morocco (except VHF CH 4 ) |
625 |
5.5MHz |
|
|
|
PAL |
I/I |
Angora |
Angora (except VHF CH 1) |
625 |
6.0MHz |
4.43MHz |
Selector: II |
|
PAL |
I/I |
Ireland |
Ireland (except VHF CH A) |
625 |
6.0MHz |
|
|
|
PAL |
I/I |
UK |
Hong Kong, U.K. |
625 |
6.0MHz |
|
|
|
PAL |
I/I |
South Africa |
South Africa (except CH 11 and 12) |
625 |
6.0MHz |
|
|
|
PAL |
D/D |
China |
China (except UHF CH 57) |
625 |
6.5MHz |
4.43MHz |
Selector: III |
|
PAL |
D/K |
O.I.R.T |
North Korea, Romania |
625 |
6.5MHz |
|
|
|
SECAM |
K1/- |
F.O.T. |
Benin, Burkina Faso, Brundi, Chad, Congo, Cote D'ivoire, Djibouti, |
625 |
6.5MHz |
4.25/4.40MHz |
|
|
|
|
|
Gabon, Guadeloupe, Guiana, Guinea, Guyana, Ivory Coast, |
|
|
|
|
|
|
|
|
Madagascar, Mali, Martinique, New Caledonia, Niger, Polynesia, |
|
|
|
|
|
|
|
|
Reunion, ST. Pierre et Miquelon, Senegal, Tahiti, Togo, Zaire, |
|
|
|
|
|
SECAM |
D/K |
O.I.R.T |
Bulgaria Czechoslovakia, Hungary, Mongolia, Poland, U.S.S.R., |
625 |
6.5MHz |
4.25/4.40MHz |
|
|
|
|
|
Vietnam |
|
|
|
|
V |
PAL |
M/M |
US |
System Selector M: BRAZIL, LAOS |
525 |
4.5MHz |
3.58MHz |
Selector: M |
|
PAL |
N/N |
US |
System Selector N: Argentina, Paraguay, Uruguay |
625 |
4.5MHz |
3.58MHz |
Selector: N |
W |
SECAM |
K1/- |
F.O.T. |
Benin, Burkina Faso, Brundi, Chad, Congo, Cote D'ivoire, Djibouti, |
625 |
6.5MHz |
4.25/4.40MHz |
|
|
|
|
|
Gabon, Guadeloupe, Guiana, Guinea, Guyana, Ivory Coast, |
|
|
|
|
|
|
|
|
Madagascar, Mali, Martinique, New Caledonia, Niger, Polynesia, |
|
|
|
|
|
|
|
|
Reunion, ST. Pierre et Miquelon, Senegal, Tahiti, Togo, Zaire, |
|
|
|
|
|
SECAM |
D/K |
O.I.R.T |
Bulgaria Czechoslovakia, Hungary, Mongolia, Poland, U.S.S.R., |
625 |
6.5MHz |
4.25/4.40MHz |
|
|
|
|
|
Vietnam |
|
|
|
|
Y |
PAL |
B/G,H |
Australia |
*Australia (except VHF CH 3-5A) |
625 |
5.5MHz |
4.43MHz |
Selector: I |
|
PAL |
B/G,H |
CCIR |
Casio Model CA |
625 |
5.5MHz |
|
|
|
PAL |
B/G,H |
Italy |
Albania, Italy |
625 |
5.5MHz |
|
|
|
PAL |
B/G,H |
New Zealand |
New Zea land (except VHF CH 1) |
625 |
5.5MHz |
|
|
|
SECAM |
B/G,H |
CCIR |
Casio Model FA |
625 |
5.5MHz |
4.25/4.40MHz |
|
|
SECAM |
B/G,H |
Morocco |
Morocco (except VHF CH 4 and 5 ) |
625 |
5.5MHz |
|
|
|
PAL |
I/I |
Angora |
Angora (except VHF CH 1) |
625 |
6.0MHz |
4.43MHz |
Selector: II |
|
PAL |
I/I |
Ireland |
Ireland |
625 |
6.0MHz |
|
|
|
PAL |
I/I |
UK |
Hong Kong, U.K. |
625 |
6.0MHz |
|
|
|
PAL |
I/I |
South Africa |
South Africa (except CH 11 and 13) |
625 |
6.0MHz |
|
|
|
SECAM |
L/L |
France |
France (except CH A) |
625 |
6.5MHz |
4.25/4.40MHz |
Selector: III |
-6-
BLOCK DIAGRAM
V H F , U H F
VHF: Abbreviation for Very High Frequency.
The sending out of radio waves at the rate of 30 to 300MHz, Producing good sound quality. UHF: Abbreviation for Ultra High Frequency.
The sending out of radio waves at the rate of 300 to 3000MHz, Producing excellent sound quality.
Antenna
VHF, UHF
Linear PCB |
|
|
|
|
|
|
IC200 |
|
|
|
|
|
|
|
|
|
|
|
|
Speaker |
||||||||
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|
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|
|
|
|
|
|
|||
|
TU200 |
|
Q200 |
|
|
Video Det. |
|
|
VR |
|
IC600 |
|
||||||||||||||||
|
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|
|
Sound Det. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Tuner |
|
|
|
IF Amp. |
|
|
|
|
|
|
|
Volume |
|
|
|
Audio |
|
|
|
|
||||||
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FM Det. |
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Control |
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Amp. |
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AFT Circuit |
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AGC Circuit |
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Tuning |
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Voltage |
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Chroma |
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Generator |
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Circuit |
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Power |
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Supply |
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Display ass'y |
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Common |
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IC700 |
Drive |
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OSC. |
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Display Control |
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A-D Converter |
LCD |
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Auto-tuning |
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Control |
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VR |
IC800 |
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Segment Drive |
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Brightness |
Display |
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Voltage |
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Control |
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Generator |
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R o d A n t e n n a |
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When the rod antenna is not properly adjustment, TV reception is not get a clear picture( picture moves up or down, disappears periodically, becomes fuzzy or blurred, is doubled, etc.). In this case, adjust angle and direction for best reception.
Locations where TV reception is bad.
•Far away from broadcasting stations, among ferro-concrete structures or near mountains.
•Underground, in tunnels or in ferro-concrete buildings.
•Near high-tension wires, neon signs, or radio stations whose frequencies interfere.
•Near railroads, highways or airport.
•In trains or cars.
-7-
Under poor reception conditions, the tuning indicator may continue to move without stopping because the auto tuner cannot detect weak broadcasts. In this case, use a commercially available external antenna or relocate the TV to a place where reception is better.
The user usually damaged the rod antenna. We suggest that you stock this parts. Model CV-1 is used both as a earphone and an antenna.
PCB Ass'y
Linear PCB
1) Color tuner: TU200
Selects a desired radio wave and changes it to the video IF signal.
2)Video IF Amp.: Q200
Amplifies the video IF signal output from the tuner by 10 times.
3)Video Det./ Sound Det./ FM Det./ AFT/ AGC: IC200
Eliminates the carrier wave in the video IF signal, and pick up the video signal and the sound signal.
Also, the sound signal is picked up from the sound IF signal by FM detection. Automatic fine tuning circuit for keeping the frequency of the oscillator in the tuner correct for best color picture by compensating for drift and incorrect tuning. Automatic gain control circuit for avoiding influence of receiving deterioration by wave strength.
4)Audio Amp.: IC600
Sound amplification.
5) Chroma Circuit: IC300
Generates the tricolor (red, green and blue) from the video signal.
6) Tuning voltage generator: IC500
Generates the tuning voltage from the tuning pulse (TU).
PW PCB: Generates the power supply voltage.
SUB PCB: Generates the power supply voltage.
RD PCB: Selects a desired radio wave.
Display Ass'y
LCD
Casio LCD television is used two type of LCD drive systems: HQM and Active matrix.
1) HQM ( Simple Matrix )
Scanning and segment transparent electrodes are arranged in closed way. To the scanning electrodes, the gate pulse is applied timesharing. The TV signal is changed into 4-bit or 3-bit data through A/D conversion (IC700), so that the TV signal can be handed with the LSI, and applied to the segment electrodes.
Structure is simple and price is low, but contrast ratio is low.
2) Active Matrix
Each picture element electrode is controlled by a transistor. To the gate electrodes, the gate pulse is applied timesharing, like the HQM. I f the gate pulse is applied, the transistors are in operation and voltage is applied between the picture electrodes and common electrodes and the liquid crystal reacts allowing the light to transmit. Structure is complicated and price is high, but contrast ratio is high.
-8-
(1) High Quality Matrix |
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(2) Active Matrix |
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Y1 Y2 Y3 Y4 |
Xn |
Y1 |
Y2 |
Y3 |
Y4 |
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X1 |
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X1 |
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X2 |
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X3 |
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X2 |
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X4 |
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X5 |
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X3 |
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X |
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X4 |
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n |
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Back Light: It produces light and allows the LCD to be seen.
A fluorescent lamp is used this back light, and the life of this unit is to be 1,500 hours.
Power Supply: 3-way power supply system.
Batteries - AA-size or AAA-size (CV-1) dry batteries.
Battery Life:
Type |
Life |
AlkalineLR6 (AM-3) |
Approx.2 ~ 3 hours |
Manganese R6 (UM-3) |
Approx.15 ~ 30 minutes |
AD PCB
1) OSC/ A-D Converter/ Display Control/ Auto-Tuning Control: IC700
Converts the color signal into a digital signal. Also, generates the clock pulse for the display and controls the display.
2) Display voltage generator: IC800 Generates the display voltage.
Back Light
Placed it under the LCD unit and producing light that TV screen can be seen. A fluorescent lamp is used this back light. The life is to be 1,500 hours. New type of fluorescent lamp is to be 3,000 hours. The back light is consumption items, so even under guarantee replace it under charge basis.
Power Supply
There are 3-way power supply systems.
1) Batteries: AAA-size and AA-size (CV-1)
We recommend to use alkaline batteries.The battery life is approx. 2 to 3 hours with alkaline battery, 15 to 30 minutes with manganese battery.
The battery supplied with TV are test battery which have a shorter life span. Low battery power generates heat. Heat does not mean malfunction.
2) AC adaptor
There are three type of AC adaptors: 6V, 9V and 12V. The optional AC adaptor is supplied from our sales department.
3) Car adaptor
There are three type of Car adaptors: 6V, 9V and 12V. The optional car adaptor is supplied from our sales department. -9-
DC IN: External power source jack. Insert the plug of the AC adaptor or the car adaptor into this jack.
EXT/ANT.: External antenna jack. Insert the plug of the optional car antenna into this jack. Connect the optional antenna adaptor AS-35S to your outdoor antenna or the optional RF cord CF-13 to your VCR.
AUDIO/VIDEO: Audio video jack. Connect the optional Audio video cable cord AV-C1 to your VCR.
-10-
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