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TV-1800C(PAL B / G,H)
TV-1800D(PAL I) TV-1800I (PAL B / G)
TV-1800N(PAL B / G,H)
(KX-523)
DEC. 1996
<
TUNING
>
R
CONTENTS
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SPECIFICATIONS ..................................................................................... |
1 |
BLOCK DIAGRAM .................................................................................... |
2 |
CIRCUIT OPERATIONS ........................................................................... |
3 |
PRINTED CIRCUIT BOARDS ................................................................... |
4 |
PARTS LIST .............................................................................................. |
6 |
EXPLODED VIEW ..................................................................................... |
9 |
SCHEMATIC DIAGRAMS ....................................................................... |
11 |
WAVEFORMS ......................................................................................... |
14 |
SPECIFICATIONS
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Specification |
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1. |
Power voltage |
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DC 6.0 V |
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2. |
Power consumption |
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Approx. 3.6 W |
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3. |
Current consumption |
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Approx. 600 mA |
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4. |
Battery life (with alkaline batteries) |
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Approx. 2.5 hours |
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Batteries |
: 4 × LR6 (D) size batteries |
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5. |
Power supply |
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Car adaptor : CA-K65 |
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AC adaptor |
: AD-K65 |
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Earphone jack |
: 3.5 ø mini |
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6. |
Connection terminals |
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External power jack |
: 6.0 V DC IN |
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External antenna jack |
: 3.5 ø mini |
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7. |
Screen size |
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2.5 inches |
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8. |
No. of picture element |
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115,020 (540 × 213) dots |
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9. |
Dimensions |
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135 mm (H) × 91 mm (W) × 38 mm (D) |
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10. |
Weight |
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240 g without batteries |
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AC adaptor |
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: AD-K65 |
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11. |
Options |
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Car adaptor |
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: CA-K65 |
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Antenna matching device : AS-35S |
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Model |
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Color System |
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TV System |
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Channel |
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TV-1800C/N |
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PAL |
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B/G, H |
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CCIR |
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VHF: 2 ~ 12 ch |
UHF: 21 ~ 69 ch |
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TV-1800D |
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PAL |
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–/I |
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UK |
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UHF: 21 ~ 68 ch |
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TV-1800I |
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PAL |
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B/G |
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ITALY |
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VHF: A ~ H2 ch |
UHF: 21 ~ 69 ch |
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— 1 —
BLOCK DIAGRAM
Antenna
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3 |
IC200 |
4 |
IC600 |
Speaker |
1 |
TU200 |
2 |
Q200 |
Video |
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VR600 |
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Sound Det. |
Audio |
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Tuner |
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IF Amp. |
FM |
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Amp. |
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AFT Circuit |
Volume |
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AGC Circuit |
Control |
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7 |
IC500 |
5 |
IC300 |
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Tuning |
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Voltage |
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Chroma |
Common |
LCD |
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Generator |
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Circuit |
Driver |
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6 |
IC700 |
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Osc. |
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Display |
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Segment |
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Control |
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A-D Converter |
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Driver |
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Auto-Tuning |
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Control |
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8 |
Q800~Q806 |
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VR800 |
Display |
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Power |
VCC2 (3.95V) |
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VCC7 (41.6~51.6V) |
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Voltage |
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Supply |
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VEE1 (-6.5~-8.0V) |
Brightness |
Generator |
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Control |
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1— Color Tuner: TU200 TEPE5-01(TV-1800C/I/N) TU200 TEPB5-05(TV-1800D) Selects a desired radio wave and changes it to the video IF signal.
2— Video IF Amp.: Q200 2SC4238
Amplifies the video IF signal output from the tuner TU by 10 times (20 dB).
3 — Video Det./Sound Det./FM Det./AFT/AGC: IC200 M51348FP
Eliminates the carrier wave in the video IF signal, and picks up the video signal and the sound IF signal. Also, the sound signal is picked up from the sound IF signal by FM detection.
4— Audio Amp.: IC600 NJM2070M Sound amplification.
5— Chroma Circuit: IC300 M52045FP
Generates the tricolor (red, green, and blue) from the video signal.
6 — OSC/A-D Converter/Display Control/ Auto-Tuning Control : IC700 MSM662501 GSK-640E Converts the color signal into a digital signal.
Also, generates the clock pulse for the display and controls the display.
7 — Tuning Voltage Generator: IC500 MSC1169MS-K
Generates the tuning voltage with the tuning pulse (TU) output from 6.
8— Display Voltage Generator: IC800 BA10358F, Q800 ~ Q806 Q810 Q811 2SD1149S, 2SD601A-R×3, 2SB709A-R
Generates the display voltages V0 ~ V4 with VEE1 and VCC7 outputs from the power supply.
—2 —
CIRCUIT OPERATIONS
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IC700 |
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TE2 |
TE4 |
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TE6 |
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VSS2 |
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TE1 |
TE3 |
TE5 |
M6 M5 M4 M3 M2 M1 |
AFT |
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Key |
KDB |
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KCB |
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Switch |
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AD2 |
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AFT |
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AVB |
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Control |
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Test Control |
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Mode Control |
Control |
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UHF |
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AD1 |
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B |
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Test |
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G |
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Circuit |
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Frequency |
Sweep |
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Mute |
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R |
A/D |
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Divider |
Control |
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Control |
MTB |
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Tuning Control |
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RLL |
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Channel |
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VLB |
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Tuning Voltage |
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VDD2 |
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bar |
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UP/DOWN Counter |
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Synchronism |
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Control |
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RHH |
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Judgment |
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Pulse Width |
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Modulation D/A |
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TU |
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M7 |
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Frequency |
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M8 |
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Separator |
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M9 |
Mode |
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VDD1 |
Control |
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Phase |
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C-S |
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M10 |
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Comparator |
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PD |
PSi |
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Display |
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VSS1 |
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Control |
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Vertical |
Horizontal |
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Frequency |
Oscillator |
OSC1 |
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Data Output |
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positioning |
positioning |
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Divider |
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Control |
Control |
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OSC2 |
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D1 |
D2 |
D3 |
D4 |
D5 |
D6 |
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CDB CFB CNB ECB |
SNB SCB STB HDB |
CK1 CK2 |
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Signal Name |
Function |
Signal Name |
Function |
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D1 ~ D6 |
Display data output terminal |
MTB |
Mute control terminal |
SNB |
Data latch signal |
TU |
Tuning control pulse output terminal |
CDB |
Scanning start signal |
VLB |
VHF High/Low channel select signal |
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output terminal |
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CFB |
Output voltage changeover signal |
UHF |
VHF/UHF select signal |
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CNB |
Scanning signal shift lock signal |
AVB |
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KCB |
Key input terminal |
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KDB |
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SCB |
Brightness modulation pulse control |
AFT |
AFT voltage input terminal |
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STB |
Sampling start signal |
M1 ~ M10 |
Mode select signal input terminal |
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ECB |
Signal input terminal controlling the |
TE1 ~ TE6 |
Test terminal |
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segment drive terminal to "H" during |
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no display |
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CK1, CK2 |
Clock pulse output terminal |
R, G, B |
Original color |
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OSC1 |
Oscillator frequency control terminal |
RLL |
"L" level voltage input terminal of |
OSC2 |
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video signal |
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PD |
Clock pulse adjustment terminal |
RHH |
"H" level voltage input terminal of |
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video signal |
C-S |
Synchronizing pulse input terminal |
PS1 |
Mode control signal |
HDB |
Horizontal synchronizing signal input |
VSS1 |
Power supply voltage input terminal |
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terminal |
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VDD1 |
VDD voltage input terminal |
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— 3 —
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