Motorola wu 870 ew service manual

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SUPPLEMENT NO. 2

TO TS-915/919 SERVICE MANUAL
:PART NO. 68P65155A03

solid state color television MANUAL 68P65155A1°

CHASSIS C, F, 23TS-915

, MODELS: W0841 EN, WDS41 EU, WD843EU, WDS44EU, WD845EU,
t, WD846EC, MDSSOEU, MD85I EC, WU870EW, WU871EW.

M service manu_a_|_|

Introduction of the AC regulated

MOTOROLA

GENERAL

regulator panel "Z" including unique

INFORMATION

The supplement introduces new
models added to the line since
publication of the original service

power supply, solid state degausser,
and solid state high voltage rectifier
are contained in this supplement.
Complete parts list pertaining to the
AC regulated power supply and

parts for the F" 23TS~915 chassis are
listed. For all other replacement parts
refer to TS-915, SUPPLEMENT 1. See
"Table of ContentsH for direction of

v related chassis and models.

manual.

MODELS: WD841EN, wos41eu, wosaazu, wos44Eu,

WDB45EU, WD846EC, MDSSOEU, M0851Ec,

E
E. TABLE OF CONTENTS
g
g AC REGULATOR CIRCUIT OPERATION .............................................. 4
E AC REGULATOR POWER SUPPLY, PARTS LOCATION ..................................... 10
AC REGULATOR POWER SUPPLY, TEST POINT LOCATION ................................. 12
AC REGULATOR TROUBLESHOOTING .............................................. 5
AC REGULATOR "Z" PANEL, PARTS LOCATION ........................................ 9
S g CABINET REPLACEMENT PARTS FOR MODELS WD841EN, MD850EN, WU870EN AND WU871EW
53 g (FOR ALL OTHER MODELS REFER TO TS»915 SUPPLEMENT 1, PART NO. 68P65155A09) .............. I6
§ { CHASSIS REPLACEMENT PARTS FOR C" 23TS-915, REFER TO T3915 SUPPLEMENT 1, PART NO. 68P65155A09
g :1 COLOR S" PANEL CODED S-IO THRU S-I2 SCHEMATIC DIAGRAM ............................ 14
El 2 REVISED ALIGNMENT PROCEDURE (REPLACES PAGE 49 0F ORIGINAL TS-915/919 SERVICE MANUAL) , . .17
g: g g SOLID STATE DEGAUSSING SYSTEM (PARTIAL SCHEMATICI ................................ 13
3 E 5 SOLID STATE HIGH VOLTAGE RECTIFIER (PARTIAL SCHEMATIC) ............................ 13
Z UNIQUE REPLACEMENT PARTS LIST FOR CHASSIS F" 23TS-915 (FOR ALL OTHER PARTS REFER TO
5 5 D" 23TS-915 CHASSIS IN TS-915 SUPPLEMENT 1, PART NO.68P65155A09) ...................... 15
I E UNIQUE REPLACEMENT PARTS TO STEREO MODELS AND SERVICE INFORMATION, REFER TO TS-QIS
E 2 SUPPLEMENT 1, PART NO. 68P65155A09. ALSO SEE RELATED PUBLICATIONS REFERENCE
RELATED PUBLICATIONS REFERENCE
Record Changer » See VMTSORC Record Changer Manual.
, K? gfigescgEChassis CHS-2500 & CHS-2600-See Stereo Manual for Models SK529E thru

MOTOROLA INC.
PART No.68P65155A10 4-69

9401 WESTGRAND AVENUE, FRANKLIN PARK, ILLINOIS
PRICE $2.00 COPYRIGHT 1969 BY MOTOROLA INC. - PRINTED IN U.S.A.

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MODEL BREAKDOWN CHART

SALES SERVICE
MODEL MODEL VHF UHF
NUMBER NUMBER CHASSIS TUNER TUNER CRT
WD841EN WDS41EN F23TS»915 OPTT-414or TT«6300r 25AP22,253P22,
0PTT-417 TT»633 25XP22, 252P22
WDS41EU WD841EU-1
WDS43EU WD843EU-l
WD844EU WD844EU~1
WD845EU WDS45EU-1
WDB46EU WDS46EC-1
*MDBSOEU MD850EU-1
*MDSSOEN MDSSOEN
*MD851EC MDSSlEC-1
WU87OEW wua7oew C23TS-915 TT-631 or
TT-632
WU871EW WU871EW I

*Stereo Theatre Models: Using OHS-2500 AM/FM Tuner, OHS-2600 Amplifier and VMI30RC Record
Changeri All models feature AFC/FT! (Automatic Fine Tuning and Fine Tuning Indicator).

CHASSIS PREFIX

LETTER DESIGNATION FEATURES RELATED TO PREFIX LETTERS

"C" 23TS-915 .............. String Drive UHF

"F" 23TS-915 .............. AC Regulated Power Supply And Solid State HV Rectifier.
Service model number

with suffix - 1t .............. Indicates that receiver is equipped with a "F" 23TS-915.
Chassis suffix letter E Denotes chassis is equipped with solid state (PTC)

(i.e., T5915 "E"I .............. degaussing circuit.

Model W084 IE/V

Model M08505 U Model M085 7E0 Model WU870E W

Model WU87IEW