Zenith E1914W Diagram
~SMtS
~ For Supplier Addre.s See PHOTOFACT Index
..J
PHOTOFACT·
f2
~
(',I
r-
LU
en
---
:c
•...
~
J:~
~W
Z(/)
W..J
NW
C
o
:E
ZENITH
MODEL SE2017W
E1914W
E2014W
E3960W
E5220W
E5230W.
E5270S
SE1915W
SE2017W
SE3935W
SE5221W
SE5261W
SE5291H
SS8915W
:.
---.,:
"0 .•••
e
Alignment
lY 1
Convergence Adjustments . . . . . . . . . . . . . . ~
Disassembly Instructions . . . . . . . . . . . . . .. 1
GridTl1ICeLocatioo Guide
CRT Board . . . . . . . . . . . . . . . . . . . . . . . 5
Main Board-Top View 4
Miscellaneous Adjustments . . . . . . . . . . . . . 6
Pans List
Infrared Detector!
Amplifier A·13326 8
Space Command Transmitter
124-128-01,124-128-03 8
lY 6,7
UHF/yHF Tuner 175-2298 7,8
Photos
Cabinet-Rear View .
Chassis-Botlom View
Shield Location . . . . . . . . . . . . . . . . . . . 6
Chassis-Top View ... . . . . . . . . . . . . . . . 5
CRT Board . . . . . . . . . . . . . . . . . . . . . . . 5
CRT Neck Assembly . . . . . . . . . . . . . . .. 6
Infrared Detector!
Amplifier A-13326 8
Main Board-Bottcm View 4,5
I!
.a.1!
~ rM
The hstlng of any
constllule In anycasearecommendallon, warranly or guaranty lonal contenl. ,n any manner, " prOhibited No patent lIablllly "
by Howard W. Sam.&Co. as 10 lhe Quallly and sullablllty 01 a.sumed with respeCllo Ihe use olthe Inlormallon contaIned herein .
···,······
•uch replace";en! part. The n~mbers ollhe.e parts have been
compIled Irom ,nlormallon furnIShed to Howard W Sam.&Co
by the manufacturers ot the parlocular Iype 01replacemenl part
listed
Howard
2647 Wlterfrolt Plrtway, East
available replacement
W.
Sam.&Company
part herein does not Reproduction or use. without express permls~uon, 01
Photos
Main Board-Top View 3,4,5
Quick-Cbecks Trooblesbooling
CRT Board . . . . . . . . . . . . . . . . . . . . . . . 5
Main Board-Top View 5
Safety Precautions .. . . . . . . . . . . . . . . . .. 1
Schematics
CRT Board . . . . . • . . . . . . . . . . . . . . . . . 2
Infrared Detector!
Amplifier A-13326 2
Selector/TUDerCartrol . . . . . . . . . . . . . . . 3
Space Command Transminer
124-128-01,124-128-03 2
Power Supply .. . . . . . . . . . . . . . . . . . . . 2
Terminal Guides and Notes 3
lY 2
UHFfVHF Tuner 175-2298 3
Servicing in the Field . . . . . . . . . . . . . . . .. I
Test Equipmenl . . . . . . . . . . . . . . . . . . . .. 1
Test-Jig Hookup 1
Trooblesbooting . . . . . . . . . . . . . . . . . . . .. I
Trooblesbooting Aid 1
Tuner Terminal Guide 8
Tuner Voltage Chart 8
DrIYI,
Sultl 300,
IlId1InapoIII, IlId1Ina
41214 U.S.A.
ed,tor,al
or pIC-
BLUE
REO
Remove nine screws holding cabinet back and remove back.
DiscOnnect HV anode, CRT socket, Deflection Yoke
connectors, Degaussingcoil connectors, Speaker connectors,
Ground leads, and all other required cabling. Release two
latches holding Remote Receiver assembly to cabinet front,
and remove Remote Receiver assembly. Remove five
screws (one in front, two with clips) holding main board
~mbly to cabinet and slide board assembly out of
cabinet.
Implosion protection is an integral part of the picture tube,
cleaning accomplished without CRT removal.
A 4-amp fuse is used for AC line protection. (See photo,
Cabinet - Rear View.)
Main
Boafd
must be removed.
Instruct ions.
(Caution: Some sets employ a CRT with neck assemblies
permanently bonded to CRT.
PO
NOT attempt to remove
these assemblies.)
Follow chassis removal procedure and lay set face down on
a soft protective surface. Loosen and remove CRT neck
assemblies. (See Caution). Remove four screws holding
CRT to cabinet front and lift CRT out of cabinet. DO NOT
LIFT CRT BY NECK.
Channel Up and Down bullons are provided for channel
scanning with ten numbered buttons (on remote transmiller)
provided for one or two digit entry direct access channel
selection. Fine tuning is automatic.
For High Voltage procedure, refer to Miscellaneous
Adjustments.
The focus may be varied by a Focus control. (See photo,
Cabinet- Rear View.)
See Miscellaneous Adjustments for Channel PretuDing
instruct ions. :
The RF AGC may be varied by an RF AGC Control. (See
photo, Main Board -Top View.)
Test Equipment listed by Manufacturer illustrates typical or equivalent equipment used by SAMS' EngIneers to obtain
measurements and is compatible with most types used by field service technicians.
Equipment
OSCILLOSCOPE
GENERATORS
RGB
MUL T1BURST SIGNAL
COLOR BAR
ANALOG VOM
DIGITAL VOM
FREQUENCY METER
HI-VOL TAGE PROBE
VOM/DMM
Accessory probes
ISOLA TION TRANSFORMER
CAPACITANCE ANALYZER
CRT ANALYZER
TEMPERATURE PROBE
AC LEAKAGE TESTER
LOGIC PROBE
LOGIC PULSER
INDUCTANCE ANALYZER
FLYBACK YOKE TESTER
TV STEREO GENERA TOR
TV STEREO POWER MONITOR
FIELD STRENGTH METER
TRANSISTOR TESTER
VIDEO ANALYZER
BIK Precision
Equipment No.
t541A. 2120. 2125. 2160 SC61
1249. 1260
1251.1260
1211A. 1249.1251.1260
114. 117. 177. 214
388HD. 2900 SERIES DVM37. DVM56A. SC61
1803. 1804. 1805 FC71. SC61
HV-44
PR-28(HV)
TR110. 1604. 1653. 1655
820.810. 830
467.470. 480. 490
TP·28. TP-30
1655
DP51. DP21
I DP101. DP31
875A LC7S. LC10l. LC102
[875A
12009
RG67
VA62A
VA62A. CG25. NT64
HP200
TP212
PR57
LC76. LC101. LC102
CR70
PR57
VA62A. LC76. LC10l. LC102
ST65. ST66
SR68
FS73. FS74
TF46
VA62A
Senc:or.
Equipment No.
Note.
-
Use an isolation transformer,or observe polarity, and maintain line voltage at 120VAC.
Al10w a 20 minute wann-up period for reciever and test equipment.
Suggested Alignment tools:
GC-THORSEN
.Alignment COILS: RECOMMENDED TOOLS:
Ll20l, Ll202, Ll205 None
Select highest unused channel. Set scope sweep to external or vector mode. Connect scope vertical input to scope vertical
input on sweep/marker generator. Connect scope external horizontal input to scope horizontal input on swee(¥marker
generator. Ground test equipmern to TV chassis unless specified otherwise. Use only enough generator output to provide
a useable indication. Sweep Generator frequency is 44MHz with lOMHz Sweep.
NOTE: Response may vary from that shown.
Connect a 6.5VDC bias to TP23 (Pin 23 IC2000).
Do not adjust Ll208.
DIRECT PROBE FROM
SWEEP GENERATOR
TPl208 TP2
SWEEP
GENERATOR GENERATOR
OUTPUT
MARKER
FREQUENCY
45.75MHz
REMARKS
Adjust Ll205 for maximum 45.75MHz marker.
Adjust Ll20l for proper symmetry and overall
shape of waveform.
See Figure 1
BAR SWEEP GENERATOR
SCOPE INPUT
REMARKS
To Antenna Terminals
Tune in a station and adjust L1402 for maximum sound. Reduce signal strength at the antenna terminals until distortion
appears. CODtinueto reduce the signal while aligning for undistorted outputbyadjusting L1402.
Connect as explained in preliminary instructions unless specified aherwise.
Connect DC Voltmeter to TP27. Adjust (R6727) for 6.4VDC. Remove meter. Connect a 6.0VDC bias to TP23.
DIRECT PROBE
FROM SWEEP
GENERATOR
TP42 TP2
SWEEP
GENERATOR
OUTPUT FREQUENCY
TP1208 Perform Video IF adjustment according to
Swee~Marker generator instructions.
See Figure 2
MARKER
GENERATOR
45.75MHz Adjust L1202 to place 45.75MHz marker to
maximum.
See Figure 3
REMARKS
•
A'104OO
2.
•
~
3M ~
1
•
DI401
'="-.
•
ClIHlI
.0047
•
lDI301
.1'
2V
C3402
.001
l000v
C3404
.001
l000V
•
•
CIalHII
I
lSOVA
1.
c:,.
•
CIIDt04
1G433
A
f[ff[f]llV
7001iA
15 111 111
s••
•
10434 1G435
C3431
.033
L341
43
l00V
10
1G424
1001:
r---'
PlItT",
I .TX3204
~8V
~.
I
I
I
I
I
I
I
I
I
I
I
I
I
RIB4
RIB4A
o
1
~1
RIB4A
.Rll347O • D3418
1200
2V :N
•
U34II 10467
CA3472
FOR TERMINAL GUIDES AND NOTES
SEE PAGE :3
PHOT.O CIRCUlTRACE •
SCHEllATIC CIRCUITRACE •
II
[ill
Z20
1100
3!llC
CR3432
•
Rll6804
-
[II[
A PHOTOFACT STANDARD NOTATION SCHEMATIC
WITH
H'·Billi·f."'
c:
Howard W. Same&Co 1190
POWER S~
!
------------------------------------------------m~
~ tb,
1 10
e
lllGUl
,.
2lI
•
CX343l1
l000Jlf
H2 1011 Ifl
C3233
,68T
2OOV·
SEE IC6700
TUNING
CONTROlLER
PIN 26
PAGE 3C,30
R3412
1000 .7V
113440 101C
1000
SEE 03400 1000
IlUTE
PAGE 2B,2C
Q6710RESET
4.
R3441
R3413
R6731
100
R6730
33lC
13
S.OV
C67Tl
lj1f
03403 S\lITCH
SEE IC6700 2l/
TltllN6
CONTROlLER
PIN 7
PAGE 3C
•
R)l32OO
43
CR3415
•
RX34I'1
3.
2O.0V
RIB4
2 2
L6601
•
16
RIB4A
R3262 R3263
Q32OORE6
56 56
S
6
6
12.0V
SOURCE
l1.SV(A)
SOURCE
".SVCB)
SOURCE
l1.SV
SOURCE
•
RX3201
C6625
10jlf
30
2W
6
11. SV(A)
1C6601 RE6
C2202
10""
C270S
4.7j1f
C6626
220""
C6630
.1~
2
~3V
RSl00
100
.wwl
BAS 1000
2000
10•..•
CSl01
.001'
(.0022')
RS109
22
RSl1S
RS121
1500
RS103
1SIC
17SV~)
'"
H
lS100
f11Tl
I I
I
~lV
1tS'l0l
2200
I
£S1 00 SPAAII:
!6AP
to..,.
SEE TlC3201
PAGE 2
X
~V
~.
,
~5V
RS102
100
8l~AS
2000
~5V
RS'IOl
100
GREEN B AS
~
2000
to..,.
CSl03
.001'
(.0022>
10,...
C5102 RS110
.001'
(.0022>
RSll'
150
RSl11
RS117
RS123
QSl01
• 'TV
RS116
RS122
22
1000
1500
22
1000
1500
RS10S
liRE£N
RSl01
LSl02
1SIC
1"
H
17SVW
0t1T lS101
1SIC
1"
H
17SVW
f11Tl
•
I
f11Tl
I ,
I ,
~2V
I
•
17SVCA>
CS101 R5127
.01T 110f(
1 leV .••
10.,.
H
DAS TO CRT
FSHIElO
FOR TERHIN,4L iUlOES AND NOTES
SEE PAGE'
PtlO'TO CIRCUlTRACE •
SCttEI1ATlC CIRCUlTRACE •
CABLING.
HEAVY LINES REDUCE
USE Of MULTIPLE LINES
A PHOTOFACT STANDARD NOTATION SCHEMATIC
WITH
O,,-IYilli·f.Gi
©
Howard W Sam.&Co 1990
II
[ill
041
fA
CRT BOARD
SET 2770 FOLDER 2
C10
470pF
R9
.0",,71
ISO
C8
C1
.068
C2
C3
10""
7
"1
A PHOTOFACT STANDARD NOTATION SCHEMATIC
©
Howard W Sams&Co 1990
IC1
TRAHSI1ITTER
X4
C5
.0",,71
Q2
121-1130A
.051
I
OUTPUT
II
TO
REI10TE
SUPPLY
C2
100""
81 '-
3V
-=-
TOTAL
-1
C4
lSOpF1
SPACE COMMAND TRANSMITIER
124-128-01, 124-128-03
Loading...