SHARP 20LK31, 20LK61 Service Manual
20LK31/61
SERVICE MANUAL
SX0L820LK31//
COLOR TELEVISION
Chassis No. SN-70A
20LK31
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its
original condition and only parts identical to those specified should be used.
This Service Manual covers the modifications from Models 20LK30A, 20LK60A. For data and information
not discussed here, please refer to the 20LK30A/60A Service Manual (S49F420LK30A).
20LK61
MODELS
OUTLINE
20LK31/61
SHARP CORPORATION
1
20LK31/61
LIST OF CHANGED PARTS
Ref.No. Description Current (20LK30A/60A) New (20LK31/61) Note
PICTURE TUBE
V101 Picture Tube VB48KRD89X/3E VB48KZL70X/*S
DY601 Deflection Yoke RCiLH0001GJZZ RCiLH0106GJZZ
L702 Degaussing Coil RCiLG0038PEZZ RCiLG0107GJZZ
Magnet PMAGF3003CEZZ PMAGF3045CEZZ
PRINTED WIRING BOARD ASSEMBLIES
PWB-A Main Unit DUNTK9731WEV1
PWB-A Main Unit DUNTK9731WEV2
PWB-B CRT Unit DUNTK9432WEV5 DUNTK9432WEV4
PWB-C Front AV Unit DUNTK9732WEV0
PWB-C Front AV Unit DUNTK9732WEV2
MAIN UNIT
IC751 I.C. VHiKA7809Pi-1 VHiKA7809AP-1
C608 Capacitor VCFPPD3CA922H VCFPPD3CA872H
R454 Resistor VRD-RA2BE334J VRD-RA2BE184J
R458 Resistor VRD-RA2BE334J — Abolished
R510 Resistor VRD-RM2HD1R2J VRD-RM2HD1R5J
R659 Resistor VRN-VV3ABR33J VRN-VV3AB2R2J
CRT UNIT
SC851 CRT Socket QSOCV0933CEZZ QSOCV0840CEZZ
MISCELLANEOUS PARTS
Speaker, x 2 VSP9050PB108A (20LK30A) VSP9050PB25WA (20LK31)
SUPPLIED ACCESSORIES
(20LK30A)
(20LK60A)
(20LK30A)
(20LK60A)
DUNTK9731WEV5 (20LK31)
DUNTK9731WEV6 (20LK61)
DUNTK9732WEV5 (20LK31)
DUNTK9732WEV6 (20LK61)
Operation Manual TiNS-6487GJZZ (20LK30A) TiNS-7176GJZZ (20LK31)
Operation Manual TiNS-6489GJZZ (20LK60A) TiNS-7176GJZZ (20LK61)
Infrared R/C Unit RRMCG1339CESA RRMCG1339CESB
PACKING PARTS
Packing Case SPAKC0002GJZZ (20LK30A) SPAKC0141GJZZ (20LK31)
Packing Case SPAKC0003GJZZ (20LK60A) SPAKC0142GJZZ (20LK61)
CABINET PARTS
1 Front Cabinet Ass'y CCABA0002WEH0
1 Front Cabinet Ass'y CCABA0003WEH0
1-4 Button JBTN-0002GJSA JBTN-0002GJSB
(20LK30A)
(20LK60A)
CCABA0114WEH0 (20LK31)
CCABA0115WEH0 (20LK61)
2
20LK31/61
Ref. No. Part No. ★ Description Code Ref. No. Part No. ★ Description Code
PARTS LIST
PWB-A: DUNTK9731WEV5(20LK31)
PARTS REPLACEMENT
Replacement parts which have these special safety characteristics
identified in this manual; electrical components having such features
are identified by å and shaded areas in the Replacement Parts Lists
and Schematic Diagrams. The use of a substitute replacement part
which does not have the same safety characteristic as the factory
recommended replacement parts shown in this service manual may
create shock, fire or other hazards.
"HOW TO ORDER REPLACEMENT PARTS"
To have your order filled promptly and correctly, please furnish the
following informations.
1. MODEL NUMBER 2. REF . NO.
3. PART NO. 4. DESCRIPTION
PWB-A: DUNTK9731WEV6(20LK61)
MAIN UNIT
INTEGRATED CIRCUITS
å IC751 VHiKA7809AP-1 J KA7809AP AG
or
VHiTA7809S/-1
CAPACITOR
[M-Poly.··· Metalized Polypro Film]
'åC608 VCFPPD3CA872H J 8700p 1.6kV M-Poly. AG
RESISTORS
[M-Ox.··· Metal Oxide]
R454 VRD-RA2BE184J J 180k 1/8W Carbon AE
R510 VRD-RM2HD1R5J J 1.5 1/2W Carbon AE
å R659 VRN-VV3AB2R2J J 2.2 1W M-Ox. AE
★MARK : SPARE PARTS-DELIVERY SECTION
'MARK : X- RAY RELATED PARTS
Ref. No. Part No. ★ Description Code
PICTURE TUBE
'åV101 VB48KZL70X/*S X Picture Tube BY
or
VB48JLL40X/*S
'åDY601 RCiLH0106GJZZ X Deflection Yoke AY
or
RCiLH0201PEZZ
å L702 RCiLG0107GJZZ X Degaussing Coil AQ
PMAGF3045CEZZ X Magnet AF
PWB-B: DUNTK9432WEV4
CRT UNIT
MISCELLANEOUS PARTS
SC851 QSOCV0840CEZZ J CRT Socket AG
MISCELLANEOUS PARTS
VSP9050PB25WA J Speaker, x2 (20LK31) AM
SUPPLIED ACCESSORIES
TiNS-7176GJZZ X Operation Manual AF
RRMCG1339CESB X Infrared R/C Unit AP
PRINTED WIRING BOARD ASSEMBLIES
(NOT REPLACEMENT ITEM)
PWB-A DUNTK9731WEV5 – Main Unit (20LK31) —
PWB-A DUNTK9731WEV6 – Main Unit (20LK61) —
PWB-B DUNTK9432WEV4 – CRT Unit —
PWB-CDUNTK9732WEV5 – Front AV Unit (20LK31) —
PWB-CDUNTK9732WEV6 – Front AV Unit (20LK61) —
PACKING PARTS
(NOT REPLACEMENT ITEM)
SPAKC0141GJZZ – Packing Case (20LK31) —
SPAKC0142GJZZ – Packing Case (20LK61) —
CABINET PARTS
1 CCABA0114WEH0 X Front Cabinet Ass'y BA
1 CCABA0115WEH0 X Front Cabinet Ass'y BB
1-1
1-4 JBTN-0002GJSB X Button AG
Not Available
3
(20LK31)
(20LK61)
– Front Cabinet —
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