Casio TV-880C Bedienungsanleitung

TV-880C(PAL B / G,H)

TV-880I(PAL B / G)

TV-880N(PAL B / G,H)

TV-880D(PAL I)

(without price)

(KX-518)

TV-880

FEB. 1999

INDEX

CONTENTS

SPECIFICATIONS ......................................................................................... 1

BLOCK DIAGRAM ....................................................................................... 2

ADJUSTMENTS ............................................................................................ 3

TV-880C/I/N ............................................................................................... 4

TV-880D..................................................................................................... 7

PRINTED CIRCUIT BOARDS ..................................................................... 10

EXPLODED VIEW ....................................................................................... 12

PARTS LIST ................................................................................................ 13

SCHEMATIC DIAGRAMS ........................................................................... 16

— 1 —

Item Specification

1. Type LCD Color Television

2. Display Element High resolution color liquid crystal display

(TI-STN Type)

3. Drive System Passive matrix system

4. Screen Size 2.3 inches

5. Backlight High luminance fluorescent material

6. Antenna Rod antenna (VHF, UHF)

7. Speaker 1 1/8ø inches (28 mm) ×1

8. Connection Terminals Earphone jack (3.5ø mini)

External power source jack (DC IN 6V)

Audio/Video input jack (3.5ø mini)

9. Power Supply 3-way power supply system

Batteries: 4 AA-size dry batteries

AC: AC adaptor AD-K64/AD-K65 (option)

Car battery: Car adaptor CA-K65 (option)

10. Power Consumption Approx. 3.1 W

11. Ambient Temperature Range 32°F (0°C) ~ 104°F (40°C)

12. Dimensions 3 1/4" (W) ×1 7/16" (D) ×5 1/16" (H) inches

83 (W) ×36 (D) ×128 (H) mm

13. Weight Approx. 6.7 oz 190 g (excluding batteries)

SPECIFICATIONS

Model Color System TV System Channel

TV-880C/N PAL B/G, H CCIR VHF: 2 ~ 12 ch UHF: 21 ~ 69 ch

TV-880D PAL –/I UK — UHF: 21 ~ 68 ch

TV-880I PAL B/G ITALY VHF: A ~ H2 ch UHF: 21 ~ 69 ch

— 2 —

BLOCK DIAGRAM

TUNER

(TEAA1) PRE

AMP

ANT

SAW

FILTER VIF/SIF

(M51348FP)

POWER SW

BAND SW

DC DC

CONVERTER

TRANS

BATTERY 1.5 V ×4

AC ADAPTOR 6V

EXTERNAL VIDEO

EXTERNALAUDIO

EAR PHONE

AUDIO2 VCC1-1

VCC2

VCC2 (4.0 V)

VCC7 (40 V)

VEE1 (—5 V)

JACK

AUDIO AMP

NJM2070M

VCC2

VCC2-8

AFI

A MUTF

MODULE

VIDEO2

AVB

VCC7 BT

VCC2 (4.7 V)

VCC1-1

VEE1VCC7

CHROMA

M52042FP

TUNING

BT GEN

BA 10358 VOLTAGE

SUPLLY

FOR LCD

DRIVER

A D CONVERTER

CONTROLLER

OM6006

INVERTER

IRANS

BL-PCB

LAMP

VCC1-1 GND

CN710

CN950

LCD DRIVER 5151

U. V

AUDIO1

VIDEO1

A-MUTE

AFT

AUDIO1

VIDEO1

RGB

C-SYNC

CN700

LCD

LCM

L-PCB

LCD DRIVER

051 LCD DRIVER

051

VCC2-0 GND

V1. V3. V0. V4. VO

CK1. CK2

D1~ 6

SNB STR

CNB2. CDB2. CFB2

EN1. EN2

MODULE

POWER

SUPPLY

— 3 —

VR301 : Tint adjustment

VR300 : Contrast adjustment

VR700 : VCO free run frequency adjustment

VR100 : VCC2 adjustment

T200 : LLD Coil adjustment

ADJUSTMENT

Top View Bottom View

1. VCC2 adjustment, VCC7, VEE1 voltage check

2. LLD coil adjustment

3. Free running frequency adjustment

4. Contrast adjustment

5. TINT pot adjustment

Preparations

1. Connect AVB (CP725) to GND.

2. Set SW100 on UHF mode.

Adjustment And Test Point Locations

— 4 —

L-PCB

DC IN

Oscilloscope

VCC1-1

IF signal

Stabilizer

Detector OUT

Low-Pass Filter

Adjust to minimize the DC level.

Signal

generator

Adjustment procedures (TV-880C/I/N)

1. VCC2 adjustment, VCC7, VEE1 voltage check

•Condition

Power supply: Vcc1-1 = 5.0 ±0.05 [V]

•Adjustment

Apply 5.0 ±0.05 [V] on Vcc1-1 (CP101).

Adjust VR100 so that Vcc2 (CP102) voltage becomes 4.00 ±0.02 [V].

•Checking

VCC7 (CP103) = 36.0 ~ 44.0 [V]

VEE1 (CP104) = –4.5 ~ –5.5 [V]

•Block diagram

2. LLD coil adjustment

•Conditions

(1) Signals

Broadcasting system: B/G,H

Color system: PAL color bar

(2) Signal level

Input electric field: 40 ±3dBµ(IF AGC full gain), P/S = 10 dB

(3) Other conditions

CCIR IF (Input electric field: terminated with 75-ohm resistance)

Power supply: Vcc1-1 = 5.0 ±0.05 [V]

•Adjustment

Monitor video detection signal (CP238) via a low-pass filter of 100 kHz cutoff frequency and adjust

LLD coil T200 so that its DC level is minimum (waveform’s amplitude is maximum).

(Reference: C= 1500 pF, R = 1 Kohm)

•Confirmation

There should be no waveform distortion (erroneous synchronization, etc.), under sensitivity (video

detector output level is abnormally small, etc.).

•Block diagram

VCC7

VCC2

VEE1

L-PCBStabilizer VCC1-1 Digital

Voltmeter

— 5 —

3.Free running frequency adjustment

•Conditions

(1) Signal

No signal (PAL standard signal should be applied only at synchronous check)

(2) Signal level

Input electric field only at synchronous check: 70 dBµ(terminated with 75-ohm resistance),

P/S = 10 dB

(3) Other conditions

CCIR IF input only at synchronous check (input electric field with 75-ohm termination).

Connect SYF terminal (CP729) and VCC2-7.

Power supply: Vcc1-1 = 5.0 ±0.05 [V]

Room temperature: 20 ±10 [°C]

•Adjustment

Monitoring HDB (CP305) with a frequency counter, adjust VR700 so that the frequency is 15.625 ±

0.1 [kHz].

•Caution

(1) Disconnect the wire between SYF terminal and VCC2-7.

Applying IF signal make sure that synchronization is normal on the display.

(2) Use input signal pattern conforming CCIR standard.

•Block diagram

4.Contrast adjustment

•Conditions

(1) Signal

Broadcasting system: B/G,H

Color system: PAL color bar

(2) Signal level

Input electric field: 70 dBµ(terminated with 75-ohm resistance), P/S = 10 dB

(3) Other conditions

CCIR IF input (input electric field should be terminated with 75-ohm resistance).

Apply voltage of Vcc1-1 = 5.0 ±0.05 [V]

•Adjustment

Connect color terminal (CP320) to GND (CP300) so that screen becomes black and white. Adjust

contrast pot VR300 so that the voltage between pedestal level and white level of B signal (CP740) is

0.80 ±0.05 [Vp-p].

L-PCB

VCC1-1

VCC2-7

SYF

Stabilizer

Signal

generator

Frequency

Counter

— 6 —

•Caution

(1) Make sure that there is no distortion on the waveforms.

(2) Connect COLOR terminal of Chroma IC (M52045FP) to GND.

(3) Monitor the B output signal with an oscilloscope via a low-pass filter (C = 2700 pF, R = 100 ohm).

•Block diagram

5.TINT pot adjustment

•Condition

(1) Signal

Broadcasting system: B/G,H

Color system: PAL color bar

(2) Signal level

Input electric field: 70 dBµ(75-ohm termination), P/S = 10 dB

(3) Other conditions

CCIR IF input (input electric field should be terminated with 75-ohm resistance).

Apply voltage of Vcc1-1 = 5.0 ±0.05 [V]

•Adjustment

Observing output signal B with an oscilloscope, adjust TINT pot VR301 so that the wave from H and

H' will be same.

•Caution

Do not connect COLOR terminal to GND.

Monitor B output signal with an oscilloscope via a low-pass filter (C = 2700 pF, R = 100 ohm).

•Block diagram

L-PCB

VCC1-1

Stabilizer

B output

Low-Pass Filter

Signal

generator

Oscilloscope

White level

Pedestal level

L-PCB

VCC1-1

Stabilizer

Low-Pass Filter

B output

Signal

generator

Oscilloscope

HH’

— 7 —

L-PCB

DC IN

Oscilloscope

VCC1-1

IF signal

Stabilizer

Detector OUT

Low-Pass Filter

Adjust to minimize the DC level.

Signal

generator

Adjustment procedures (TV-880D)

1. VCC2 adjustment, VCC7, VEE1 voltage check

•Condition

Power supply: Vcc1-1 = 5.0 ±0.05 [V]

•Adjustment

Apply 5.0 ±0.05 [V] on Vcc1-1 (CP101).

Adjust VR100 so that Vcc2 (CP102) voltage becomes 4.00 ±0.02 [V].

•Checking

VCC7 (CP103) = 36.0 ~ 44.0 [V]

VEE1 (CP104) = –4.5 ~ –5.5 [V]

•Block diagram

2. LLD coil adjustment

•Conditions

(1) Signals

Broadcasting system: I

Color system: PAL color bar

(2) Signal level

Input electric field: 40 ±3dBµ(IF AGC full gain), P/S = 7 dB

(3) Other conditions

UK IF (Input electric field: terminated with 75-ohm resistance)

Power supply: Vcc1-1 = 5.0 ±0.05 [V]

•Adjustment

Monitor video detection signal (CP238) via a low-pass filter of 100 kHz cutoff frequency and adjust

LLD coil T200 so that its DC level is minimum (waveform’s amplitude is maximum).

(Reference: C= 1500 pF, R = 1 Kohm)

•Confirmation

There should be no waveform distortion (erroneous synchronization, etc.), under sensitivity (video

detector output level is abnormally small, etc.).

•Block diagram

VCC7

VCC2

VEE1

L-PCBStabilizer VCC1-1 Digital

Voltmeter

— 8 —

3.Free running frequency adjustment

•Conditions

(1) Signal

No signal (PAL standard signal should be applied only at synchronous check)

(2) Signal level

Input electric field only at synchronous check: 70 dBµ(terminated with 75-ohm resistance),

P/S = 7 dB

(3) Other conditions

UK IF input only at synchronous check (input electric field with 75-ohm termination).

Connect SYF terminal (CP729) and VCC2-7.

Power supply: Vcc1-1 = 5.0 ±0.05 [V]

Room temperature: 20 ±10 [°C]

•Adjustment

Monitoring HDB (CP305) with a frequency counter, adjust VR700 so that the frequency is 15.625 ±

0.1 [kHz].

•Caution

(1) Disconnect the wire between SYF terminal and VCC2-7.

Applying IF signal make sure that synchronization is normal on the display.

(2) Use input signal pattern conforming UK standard.

•Block diagram

4.Contrast adjustment

•Conditions

(1) Signal

Broadcasting system: I

Color system: PAL color bar

(2) Signal level

Input electric field: 70 dBµ(terminated with 75-ohm resistance), P/S = 7 dB

(3) Other conditions

UK IF input (input electric field should be terminated with 75-ohm resistance).

Apply voltage of Vcc1-1 = 5.0 ±0.05 [V]

•Adjustment

Connect color terminal (CP320) to GND (CP300) so that screen becomes black and white. Adjust

contrast pot VR300 so that the voltage between pedestal level and white level of B signal (CP740) is

0.80 ±0.05 [Vp-p].

L-PCB

VCC1-1

VCC2-7

SYF

Stabilizer

Signal

generator

Frequency

Counter

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