JVC AV-28BD5EE, Руководство по обслуживанию

Страница: 54 / 56

AV-28BD5EKI AV-28BD5EP AV-28BD5EE
AV-28BD5EKIS AV-28BD5EPS AV-28BD5EES
1
No.51709
AV-28BD5EKI AV-28BD5EP AV-28BD5EE
AV-28BD5EKIS AV-28BD5EPS AV-28BD5EES
AV-28BD5EKI / AV-28BD5EP / AV-28BD5EE
AV-28BD5EKIS / AV-28BD5EPS / AV-28BD5EES
STANDARD CIRCUIT DIAGRAM
n
NOTE :
1.
RESISTANCE IS SHOWN IN OHM. K=1000, M=1000000
2.
UNLESS OTHERWISE NOTED IN SCHEMATIC ALL CAPACITOR VALUES ARE EXPRESSED IN Ê
Ê Ê
Ê F
3.
VOLTAGES READ WITH “VTVM” FROM POINT INDICATED TO CHASSIS GROUND USING A COLOR BAR SIGNAL
WITH ALL CONTROLS AT NORMAL LINE 230V AC VOLTAGE READINGS SHOWN ARE NORMAL VALUES AND MAY
VARY +20% EXCEPT H.V
4.
THIS CIRCUIT DIAGRAM IS A STANDARD ONE CIRCUIT PRINTED MAY BE SUBJECT TO CHANGE FOR PRODUCT
IMPROVEMENT WITHOUT PRIOR NOTICE.
n WARNING :
BEFORE SERVICING THE CHASSIS, READ “X-RAY RADIATION”, “SAFETY PRECAUTION”, AND “PRODUCT
SAFETY NOTICE” IN SERVICE MANUAL.
n PRODUCT SAFETY NOTE :
COMPONENTS MARKED WITH !
! !
! ARE IMPORTANT FOR MAINTAINING.
THE SAFETY OF THE SET AND SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE
ORIGINAL OR SPECIFIED ONE IN THE PARTS LIST.
DON’T DEGRADE THE SAFETY THROUGH IMPROPER SERVICING.
n
CAUTION TO SERVICE TECHNICIANS :
BEFORE RETURNING THE RECEIVER TO CUSTOMER, LEAKAGE CURRENT OR RESISTANCE MEASUREMENTS
SHOULD BE PERFORMED TO DETERMINE THAT EXPOSED PARTS ARE PROPERLY INSULATED FROM THE
SUPPLY CIRCUIT.
CONTENTS
n
BLOCK DIAGRAM 2-2
n CIRCUIT DIAGRAM 2-3
n
PATTERN DIAGRAMS 2-5
RESISTOR CAPACITOR COIL
2-2
Jun. 2000 No.51709
BLOCK DIAGRAM
BASE BAND SIGNAL
#28 #29
#49 #50
#52 #53
#36 #37
#58
SOUND PROCESSOR I601
AUDIO OUT SCAR
T1
AUDIO IN SCAR
T2
AUDIO SCAR
T1
I602
AUDIO
AMPLIFIER
T
O SPEAKERS/
HEAD PHONE
I702
MEMOR
Y
II C BUS
VIDEO PROCESSOR
I501
#51 #52 #53
#46 #47 #48
#43
#40
#2 #3
MICRO CONTROLLER
TO CR T BOARD
VIDEO
IN
VIDEO
OUT
QSS OUT
EXIT
VIDEO IN
#38
#35
#42
#23 #24
#28 #29
IF
VIDEO IF
IF=38.9MHz(All standard except L’)
=33.9MHz(L’)
SF1
SF2
AUDIO IF
#4-I501
RGB OUT
EXT RGB IN
CHROMA IN
TRAP
5.5MHz
SIF(5.5MHz for system B/G)
SWITCHING
CURCUIT
VIDEO IN
SCAR
T1
SCAR
T2
SWITCH CONTROL
form #8-I501 and #-8 SCAR
T1
www.freeservicemanuals.info 17/3/2013 www.nostatatech.nl
World of free manuals