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R
(with price)
JUN. 1995
EV-500C(KX-615C)
EV-500D(KX-615D)
EV-500I (KX-615I)
EV-500N(KX-615N)
INDEX


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-- 1 --
CONTENTS
SPECIFICATIONS ......................................................................................... 2
BLOCK DIAGRAM ........................................................................................ 3
CIRCUIT DESCRIPTION ............................................................................... 4
ADJUSTMENT ............................................................................................... 5
TROUBLESHOOTING ................................................................................. 10
PRINTED CIRCUIT BOARDS ..................................................................... 11
WIRING DIAGRAM ...................................................................................... 13
EXPLODED VIEW ....................................................................................... 14
ELECTRICAL PARTS LIST ......................................................................... 15
MECHANICAL PARTS LIST ....................................................................... 22
IC AND TRANSISTOR LEAD IDENTIFICATION ........................................ 23
SCHEMATIC DIAGRAMS ........................................................................... 25
WAVEFORMS .............................................................................................. 28


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-- 2 --
SPECIFICATIONS
Item
Specification
1.
Reception channels
2.
Power voltage
DC 6.0 V
3.
Power consumption
Approx. 3.7 W
4.
Current consumption
Approx. 617 mA
5.
Battery life (with alkaline batteries)
Approx. 2.0 hours
Batteries
: 3 AA size batteries
6.
Power supply
Car adaptor : CA-K65
AC adaptor : AD-K65
Earphone jack
: 3.5ø mini
7.
Connection terminals
External power jack
: 6.0 V DC IN
External antennea jack : 3.5ø mini
Audio / Video jack
: 3.5ø
8.
Screen size
2.5 inches
9.
No. of Picture element
61,380 (220
× 279) dots
10.
Dimensions
75 (W)
× 26.7 (D) × 120.8 (H) mm
3 (W)
× 1 (D) × 4 3/4 (H)
11.
Weight
191 g excepting batteries
6.7 oz excepting batteries
12.
Standard accessories
Test batteries (R6
× 3)
AC adaptor
: AD-K65,64
13.
Options
Car adaptor
: CA-K65
RF connector
: CF-13
Antenna matching device : AS-35S
14.
Body color
Black
EV-500C,N: VHF: 2 ~ 12 ch UHF: 21 ~ 69 ch
EV-500D:
VHF: --
UHF: 21 ~ 68 ch
EV-500I:
VHF: A ~ H2ch UHF: 21 ~ 69 ch


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-- 3 --
Antenna
1
TU200
2
Q200
3
IC200
7
Tuning
Voltage
Generator
VR600
Volume
Control
4
IC600
Speaker
IC300
IC700
LCD
Chroma
Circuit
Display
Control
Auto-Tuning
Control
5
6
VCC2 (4.5 ± 0.02 V)
VCC7 (25.9 ~ 31.3 V)
VCC6 (10.8 ~ 12.0 V)
VEE1 (­8.5 ~ ­7.5 V)
VEE2 (­19.8 ~ ­17.2 V)
IC270
Power
Supply
Audio
Amp.
IF Amp.
Tuner
Video
Sound
Det.
FM
AFT Circuit
AGC Circuit
Det
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 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 IR3P90Y
Generates the tricolor (red, green, and blue) from the video signal.
6
-- Display control/Auto-tuning control: IC700 MSM6770GS
Controls the display.
7
-- Tuning voltage generator: IC270 BA10358F
Generates the tuning voltage with the tuning pulse output from 6.
BLOCK DIAGRAM


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-- 4 --
Vcc1-1
CP100
R108
270
K
R110
270
Q110
2SD1819A-R
Q111
2SD1119-R
C137
R107
D100
MA142WK 33 K
B6800 p
C140
470 p
R115
100
6.3
V
220
C100
D110
MA3051-L
2.2
BH102K
TM100
Q101
2SD1819A-R
2.2K
R113
R105
3.3
K
VR100
2K
C105
GND
C145
B1500
p
CP101
1
2
9
6
3
4
5
6
7
8
T100
LC12U-35
D158 MA143A
R160
68
(D: 180)
C146
220 p
D156 MA142WK
D154 MA142WK
D150
MA142WK
D152
MA142WK
L101
100 u
L102
330 u
CP110
CP111
CP113
CP114
CP115
C110
25
V
10
C114
6.3
V
220
C116
6.3
V
220
C120
35
V
22
R150
33
K
Vcc2-2
Vcc7 (29.5 V)
Vcc6 (11 V)
Vcc2-1 (4.5 V)
VEE1 (-7.5 V)
VEE2 (-18 V)
GND
(3.9 V)
C112
16
V
47
C118
16
V
22
C150
OPEN
CIRCUIT DESCRIPTION
POWER SUPPLY
Figure 1
Name
Voltage
Function
VCC2-1
4.50
± 0.02 V
Main voltage
VCC7
25.9 ~ 31.3 V
Tuning voltage
VCC6
10.8 ~ 12.0 V
Display voltage
VEE1
­8.5 ~ ­7.5 V
Display voltage
VEE2
­19.8 ~ ­17.2 V
Display voltage
Table 1
The power supply consists of a DC-DC converter and the associated circuit and supplies the voltages as shown
in Table 1.