Emerson Keystone Figure 637, Service Manual

Page: 2 / 37

Emerson Radio
Par.
1
2
3
4
5
6
7
TABLE OF C O N T E N T S
SECTION 1— GENERAL DESCRIPTION
Page
1 Facilities ------
2 Specifications
SE C TIO N 2— IN S T A L L A T IO N
Preparation for Installation _____________
Antenna Installation ---------------------------------
Receiver Installation -----------------------------------
SE C TIO N 3— O P E R A T IO N
Tuning
SE CTIO N 4 — CIRCU IT DESCRIPTION
General _______ ____
Tuner ____________
Video Section ____
Deflection Section
SE C TIO N 5— M A IN T E N A N C E A N D A L IG N M E N T *
1 General ________ _________________ ____________________ 10
2 Chassis Removal _____________________________________ 10
3 Kinescope Replacement --------------------------------------------- 10
4 Mechanical Deflection Adjustments ________________ 10
5 Electrical Deflection Adjustments __________________ 11
6 Alignment Test Equipment _________________________ *12
7 Alignment ________________________________________ _ 12
8 Voltage ‘and Resistance Analysis ___________________ 17
9 Deflection Circuit Waveforms _____________________ _ 17
10 Production Changes _________________________________ 19
11 Secondary Area Reception __________________________ 21
12 Cabinet Parts List _______________ ____________________ 21
13 Chassis Parts List ____________________________ ______ 22
Table
I
II
III
IV
V
LIST OF TABLES
D ESCRIPTION
Tube Complements __________
Receiver Characteristics _____
Adjustments Control Settings
Page
3
4
.
11
Generator Frequencies _____ ._______________________ 12
Audio I-F Alignment ________..._____________________ 15
4
V I Video I-F Alignment ___________________________
16
VII Tuner Alignment ________________________________ ....
17
V III Deflection Waveform Test Points ______________
18
4
LIST OF IL L U ST R A T IO N S
4
Fig. DESCRIPTION Page
5
1-1 Front View of Chassis 120098B _________________
3
1-2 Tube Location Diagram _________________________ -
4
1-3 Video, Audio, and Oscillator Frequencies______ - 4
5
3-1 Front Panel Controls ___________________________
5
5
3-2
Test Pattern, Correctly Adjusted ______________ —
6
3-3
Test Pattern, Tuning Misadjusted ______________ ... 6
3-4 Test Pattern, Excessive Contrast ______________
6
3-5
Test Pattern, Excessive Brightness _____________ 6
7
3-6
Test Pattern, Vertical Hold Misadjusted ______
6
8
8
3-7
Test Pattern, Horizontal Hold Misadjusted __ 6
9
3-8 Test Pattern, Focus Misadjusted ________________ 6
9
3-9 Test Pattern, Weak Signal _____________________ 6
10
4-1
Block Diagram— Chassis 120110B, 120113B 7
10
4-2
Schematic Diagram of Tuner __________________
8
5-1
Deflection Yoke and Focus Coil Adjustments
5-2
5-3
5-4
5-5
5-6
5-7
5-8
5-9
5-10
5-11
5-12
5-13
Combined Mechanical and Electrical Centering___ 11
Focus Coil Adjustments, Mechanical Centering ___ 11
Schematic Diagram Chassis 120110B ---------------- 13*,.14
Rear Deflection Adjustments ______________________ \2
Generator Matching Network ------------- --------------------- i2
Scope Detector Network _____________________ _— 12
Location of Alignment Points ------ ------------------ ----- 15
Tuner Alignment Points ------------------------------------------ 16
Side View of Tuner — ------ -— ---------------------------------- 17
Voltage and Resistance Diagram ------------------------- - 18
Sweep Circuit Waveforms ------ ---------------------------— 19
High Voltage Power Supply, Chassis 120113B------- 20
Bottom View of Chassis ---------------------------------------— 21
See Page 24 for information on Model 648B.
2
Scanned by mbear2k - Jan 20121/17