JVC KV-C10 Service Manual
SERVICE MANUAL
MOBILE TV TUNER SYSTEM
KV-C10
Area Suffix
J ----- Northern America
KV-C10
12
HEADPHONE
RL
AUDIO
OUTPUT
ANTENNA INPUT INPUT 2
234
VIDEO L R
Contents
Safety precautions
Disassembly method
Adjustment method
Description of major ICs
VIDEO TO DISPLAY VOCAL POWER
VIDEO
CONTAUDIO L RAUDIOVIDEO1
SUPPLY
INPUT 1
1 2
1 3
1 4
1 6~13
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
No.49654
Aug. 2001
KV-C10
Safety precaution
!
Burrs formed during molding may be left over on some parts of the chassis. Therefore,
pay attention to such burrs in the case of preforming repair of this system.
1-2
Disassembly method
KV-C10
Removing the metal cover
(See Fig.1)
1.
Remove the four screws A attaching the metal cover
on the back of the body.
2.
Remove the four screws B attaching the metal cover
on both sides of the body.
3.
Remove the metal cover from the body by lifting the
rear part of the cover.
Metal cover
B
A
Fig.1
C
Removing the main board
(See Fig.2 to 3)
Prior to performing the following procedure, remove
the metal cover.
1.
Remove the four screws C attaching the pin jack
and the main board.
2.
Remove the four screws D attaching the main
board.
D
Fig.2
Front panel
Main board
D
Fig.3
1-3
KV-C10
Adjustment method
1. Connection
Video
pattern
generator
FM
Signal
generator
Video
pattern
generator
FM
Signal
generator
TP201
GND
Fig. 1
TV Signal generator
TV Signal generator
DC volt meter
+
-
+
-
+
-
Attenuator
Fig. 3
Attenuator
TP202
GND
Antenna receptacle
Video output
Unit under test
Antenna receptacle
Unit under test
GND
TP202
GND
Digital counter
+
-
Fig. 2
Oscilloscope
75 ohm
+
-
DC Volt meter
+
-
Video
pattern
generator
FM
Signal
generator
TV Signal generator
+
-
Attenuator
Fig. 4
Antenna receptacle AC VTVM
L
Audio output
GND
Unit under test
47 kohm
R
+
-
Oscilloscope
+
-
Fig. 5
1-4
Fig. 6
2.
Main board test point location
KV-C10
(Reverse side)
3. Control settings
TP202
H.SYNC
TP201
ANT.LEVEL
TP101
AGC
Fig. 7
VR101
(Foward side)
L103
L101
IC201
VR201
VR202
Power switch ---------------------------------- On
TV channel ------------------------------------ Center position
Video pattern generator -------------------- Color bar
4. Adjust procedures
Step
1
2
3
4
5
Description
Antenna
level
adjustment
H.Sync
adjustment
PIF coil
adjustment
RF AGC
Adjustment
Audio
adjustment
Connection
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Signal generator
Color bar
Ch 12
60 dBuV
Color bar
Ch 12
60 dBuV
Ch 12
60 dBuV
TV Channel
Ch 12
Ch 12
Ch 12
Test point
TP201
TP202
Video
output
TP101
Audio
output
Adjustment
Adjust VR202
for 1.3V
Adjust VR201
for 15.73kHz
Adjust L101
for see Fig. 6
Adjust VR101
for 3.5V
Adjust L103
for max.output
1-5
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