Casio EV-600B Service manual
(without price)
EV-600B(NTSC)
(KX-613)
SEPT. 1997
R
CONTENTS
SPECIFICATIONS ......................................................................................... |
2 |
BLOCK DIAGRAM ........................................................................................ |
3 |
TROUBLESHOOTING ................................................................................... |
4 |
PRINTED CIRCUIT BOARDS ....................................................................... |
5 |
EXPLODED VIEW ......................................................................................... |
7 |
PARTS LIST .................................................................................................. |
8 |
SCHEMATIC DIAGRAMS ........................................................................... |
11 |
WAVEFORMS.............................................................................................. |
13 |
— 1 —
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SPECIFICATIONS |
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Item |
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Specification |
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1. |
Reception channels |
VHF: 2 ~ 13 ch UHF: 14 ~ 69 ch |
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2. |
Power voltage |
DC 6.0 V |
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3. |
Power consumption |
Approx. 3.8 W |
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4. |
Current consumption |
Approx. 630 mA |
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5. |
Battery life (with alkaline batteries) |
Approx. 2.0 hours |
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Batteries |
: 3 AA size batteries |
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6. |
Power supply |
Car adaptor : CA-K65 |
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AC adaptor |
: AD-K64 |
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Earphone jack |
: 3.5ø mini |
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7. |
Connection terminals |
External power jack |
: 6.0 V DC IN |
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External antenna jack |
: 3.5ø mini |
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Audio / Video jack |
: 3.5ø |
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8. |
Screen size |
3.0 inches |
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9. |
No. of Picture element |
75,816 (234 × 324) dots |
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10. |
Dimensions |
125.0 (W) × 32.0 (D) × 101.2 (H) mm |
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11. |
Weight |
290 g excepting batteries |
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AC adaptor |
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: AD-K65,64 |
12. |
Options |
Car adaptor |
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: CA-K65 |
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RF connector |
: CF-13 |
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Antenna matching device : AS-35S |
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AV cord |
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: AV-C1 |
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— 2 —
BLOCK DIAGRAM
Antenna
1TU200 |
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2Q200 |
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3IC200 |
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4IC600 |
Speaker |
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Video |
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VR600 |
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Sound Det. |
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Tuner |
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Audio |
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IF Amp. |
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FM |
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Amp. |
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AFT Circuit |
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Volume |
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AGC Circuit |
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Control |
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7 |
IC501 |
5 |
IC300 |
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Tuning |
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Voltage |
Chroma |
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LCD |
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Generator |
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Circuit |
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6IC400
Display
Control
Auto-Tuning
Control
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VCC2 (5.0 ± 0.02 V) |
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Power |
VCC7 (28.8 ± 2.9 V) |
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VCC6 (9.1 ± 0.5 V) |
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Supply |
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VEE1 (–20.0 ± 2.0 V) |
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VEE2 (–8.1 ± 0.8 V) |
1— Color tuner: TU200 TEPU5-02
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 tuner TU200 by 10 times (20 dB).
3— Video det./Sound det./FM det./AFT/AGC: IC200 M51348AVP
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 IR3P90Y
Generates the tricolor (red, green, and blue) from the video signal.
6— Display control/Auto-tuning control: IC400 LZ93BA5 Controls the display.
7— Tuning voltage generator: IC501 BA10358F
Generates the tuning voltage with the tuning pulse output from 6.
— 3 —
TROUBLESHOOTING
Symptom |
Cause |
Solution |
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No power supply |
Defective power switch (SW100). |
Replace. |
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No picture and |
Defective DC-DC converter (T100). |
Replace. |
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no sound |
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Defective tuner (TU200). |
Replace. |
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Defective Q200. |
Replace. |
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Defective IC200. |
Replace. |
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Defective IC300. |
Replace. |
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Defective IC400. |
Replace. |
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Defective IC501. |
Replace. |
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Picture OK but |
Defective IC200. |
Replace. |
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no sound |
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Defective IC600. |
Replace. |
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Defective phone jack (JK600). |
Replace. |
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No reception of |
Defective tuner (TU200). |
Replace. |
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VHF or UHF |
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Defective IC501. |
Replace. |
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Defective power switch (SW100). |
Replace. |
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— 4 —
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