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service manual
C, B A
Models:
AV-20N3
AV-20N3/D
AV-20NMG3
AV-20NMG3/-A
AV-20NMG3B
1
9
32
32
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32 pages, 612.01 Kb
No. 52025
A
V-20N
3
A
V-20NMG3
A
V-20NMG3B
9
CRT SOCKET
PWB
FRONT CABI.
POWER
CORD
SPEAKER
SPEAKER
MAIN
PWB
C
C
REAR
COVER
B
A
(
×
×
×
×
2)
(
×
×
×
×
1)
(
×
×
×
×
6)
(
×
×
×
×
2)
Contents
Main
No. 52025 Jun. 2002
AV-2 0N3/ AV- 20N3 AV-20NMG3/AV-20NMG3B /AV-20NMG3
/-A
SERVICE MANUAL
COLOUR TELEVISION
CG
SPECIFICATIONS
Design and specifications are subject to change without notice.
No.52025
V-20NMG3
3
SAFETY PRECAUTIONS
FEATURES
SYSTEM BLOCK DIAGRAM
IC301
IC702
TU001
FUNCTIONS
FRONT PANEL
REAR TERMINAL
REMO TE CONTRO L UNIT
RM-C364GY : AV-20N3 / AV-20N3/D / AV-20NMG3 / AV-20NMG3/-A RM-C364 : AV-20NMG3B
MAIN DIFFERENCE LIST
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
C
B A
REPLACEMENT OF MEMORY ICs
1. MEMORY ICs
2. PROCEDURE FO R REPLACING MEMORY IC s
Page
INITIAL SETTING VALUE OF SERVICE MENU
Page
REPLACEMENT OF IC301 (IF V/C DEC ODER)
SERVICE ADJUSTMENTS
BEFORE STARTING SERVICE ADJUSTMENT
MEASURING INSTRUMENT AND FIXTURES
ADJUSTMENT ITEMS
BASIC OPERATION OF SERVICE MENU
SERVICE MENU FLO W CHART
ADJUSTMENT LOCATIONS
CRT SOCKET PWB
MAIN PWB
No. 52025
V-20N3
ADJUSTMENTS
B1 POWER SUPPLY
FOCUS ADJUSTME NT
IF CIRCUIT ADJUS TMENT
Page
VIDEO / CHROM A CIRCUIT ADJUSTMENT
RGB
9
Page
W
G
(
A
)
W
(B)
Cy
Page
DEFLECTION CI RCUIT ADJUSTMENT
92%
VSM PRESET SETTING
Fig.3
PURITY / CONVERGENCE ADJUSTMENT
PURITY ADJUST MENT
No.52025
STATIC CONVERGENCE ADJU STMENT
DYNAMIC C ONVERGENCE ADJU STMENT
REPLACEMENT OF CHIP COMPONENT