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H O N E
C H E L S E A
2 - 1 8 0 0
R A D I O
TO ALL EMERSON TELEVISION DISTRIBUTORS*
Subject*
Models 614C, 637C, 644C, 647C using chassis 120110C and 120113C having
triangle codes 1 and 2.
change will be identified by code triangle 3.)
Models 614B, 637B, 644B, 647B using chassis 120110B and 120113B having
triangle code number 8.
1.
Cut wire between triangle lug andsquare lug of C-41, part #925166.
2.
Remove lead (blue) from pin #6 of 6AU6 first video amplifier going
to the triangle lug of C21.
to the last empty lug on the terminal strip near C21.
3.
Cut one end of R21 — 1500 ohm irom pin #6 and extend this resistor to
the same lug of terminal strip near C21 in step #2.
4.
From this mm* empty lug, run a jumper lead, approximately 16" long to
another empty lug on the terminal strip near the 6W4.
terminal lug, connect a 10K, 1 watt resistor to the junction of the
3300 ohm, 1 watt, R-102 and the resistor 7500 ohm, R86.
plus point.)
5.
Connect pin #6 of the 6AU6 first video amplifier to the square of C41
6.
Replace .047, C-19 kinesoope coupling with a .01 mf. condenser (400V).
Models 614B, 637B, 644B, 647B using chassis 120110B and 120113B having
triangle codes 1, 4 and 5.
1.
Remove 33K, 1 watt between pin #6 of V-5 and terminal board and replace
with a 10K, 1 watt resistor.
2.
Remove all connections from pin #6 of V-5, 6AU6 leaving *11 connections
intact but away from pin #6 (blue lead, 10K, 1500 ohm).
3.
Connect a jumper'wire from pin #6 of V-5 to C-41 (square terminal electrolytic).
4.
Connect a jumper wire (16") from junction of lug on terminal board and
10K ohm resistor from step #1 to junction of the damper resistor
A G R E E M E N T S A N D S A L E S S U B J E C T T O S T R I K E S
C A B L E
A D D R E S S ,
E M P H O N O C O
' E merson
A N D
P H O N O G R A P H
111 EIGHTH AVENUE
Field Servioe Bulletin #1 .
Revision to eliminate picture flutter caused
by line voltage variation.
(Sets already manufactured incorporating this
Scanned by mbear2k - Jan 20121/17
N E W
Y O R K
C O D E S
C O R P O R A T I O N
NEW YORK CITY, 11
December 28, 1949
Strip end of this (blue) lead and connect
A C C I D E N T S , O R O T H E R C A U S E S
B E Y O N D
B E N T L t Y S
A B C
5
E D I T I o N
On this new
(Boostered B
O U R
C O N T R O L
I
P
m
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