Motorola xp 251 d service manual

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WW

SUPPLEMENT N0. 1
TO TS<450 SERVICE MANUAL

FAFIT N0 . 68F65135A84

COVERS
CHASSIS CODED

AOS THFIU B-DO

SUPPLEMENT N0. 1
TO Ts-4ao SERVICE MANUAL,
PART No. 68P65135A84

MOTOROLA

GENERAL INFORMATION

This supplement introduces two (2)
new receivers added to the line since
the publication of the original TS-460
service manual.

Complete schematic diagram including
circuit modifications for chassis coded
TS-460A-OO thru 300 are included as
well as partial schematics for chassis
coded prior to 8-00. Unique electrical
and complete cabinet parts are listed.
For all other parts, refer to the original
TS-460 service manual.

The XPZSZD is designed for 120 volt
AC operation or will operate from a
+12 volt DC source. This model
contains a built-in voltage regulator
which provides a constant output

COVERS
CHASSIS CODED
A-08 THRU 8-00

Iii/x

television MANUAL 68P65135A85
CHASSIS 9,D9,Y9,YD9,TS-460
MODELS XP,YXP,25ID

XP,YXP,2520

service manual

Model XP25 70

Model XP25ZD

OPTIONAL EQUIPMENT FOR

MODELS ABOVE

2 -- Car antenna - attaches to
window - complete with mounting
bracket.

1 A- Sun shade - use for high ambient

3 -- Boat antenna -complete with

light conditions. universal mounting bracket.

when used from mobile operation.
Also incorporated is an earphone jack
and earphone for private listening.

INDEX
The XP251 D is also designed to Page
9 g operate from 120 volt AC or +12 volt
8 2: DC source. This model does not CHASSIS CODING CHANGES ..................... 2
m u'; é contain a built-in voltage regulator. If CHASSIS SCHEMATIC DIAGRAM ................... 8
2 '5,- c; regulation isdesired.an external Plug-in EXTERNAL VOLTAGE REGULATOR ................ 2
2 R a : voltage regulator (KT-128) is available GENERAL INFORMATION 1
«_ F ~ I M l D. b _ .......................
a g gg a Im" °°'°a ' r' W PARTIAL CKT DIAGRAMS ....................... 3
j 8 E- KT-izs voltage regulator schematic REPLACEMENT PARTS LIST .................... 6,9
g g 65'; and replacement parts list are VHF TUNER»CPTT-418 ........................ 5
- E 3 g contained in this supplement.
g 2 w v:
E E
o g MODEL BREAKDOWN CHART

V REGULATED
%5 MODEL CHASSIS VHF TUNER UHF TUNER CRT EARPHONE POWER SUPPLY
: E *
i g YXP,XP,25I Y9,9,TS-460 CPTT-403 TT-628 9YP4 ------ Optional plug-in
l DG,L,R,U 0" 0r (KT-128)
CPTT-418 TT-629
at
YXP,XP,252 YDgpg, CPTT-403 TT-628 9YP4 YES Built-in
DU T8460 or or
CPTT-418 TT-629

MOTOROLA INC.
PARTNO.68P65135A85 7-68

9401 WEST GRAND AVENUE, FRANKLIN PARK, ILLINOIS
PRICE SSCENTS COPYRIGHT 1968 BY MOTOROLA INC. - PRINTED IN USA.

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CHASSIS CODING CHANGES

Chassis
Coding Chassis Coding Changes

9TS-460A-08 TO IMPROVE VIDEO BIAS RANGE: R116, 1K, 1/2 watt resistor changed to 1.5K, /2 watt
resistor.

9TS-460A-09 DESIGN CHANGE: To decrease horizontal width, choke added to flyback terminal board - see
schematic for circuit.

9T5-460A-10 TO IMPROVE VIDEO DETAIL: R202 (220K) replaced with 33K, 1/2 watt resistor. C202 (.01)
replaced with .05.

QTS-460A-11 DESIGN CHANGE: To reduce horizontal frequency drift, C506 (.01) replaced with a special
.01, Part No. 8810191A35.

9TS-460A-12 RELIABILITY CHANGE: T501 flyback transformer replaced with Part No. 24D67561A05
and a 1X23 high voltage rectifier tube.

9TS-460A42 RELIABILITY CHANGE: Vertical output choke L600 replaced with Part No. 25D67554A13,

QTS-4BOB-00 DESIGN CHANGE: 012 audio driver (M4842) omitted from circuit~see schematic for
change.

DESIGN CHANGE: Horizontal driver circuit - see schematic for change.

0 DEllA
+ P1l< (ZENE

INPUT
FROM BATTERY 3-

NOTE: WHEN REPAIR IS NECESSARY AND PARTS ARE REPLACED, IT IS
RECOMMENDED THAT THE UNIT BE ADJUSTED TO REGULATE
AT 12.3V OUTPUT WITH AN INPUT VOLTAGE CF 13.5 VOLTS.
Schematic Diagram - External Vn/tage Regulator - K 7'- 128

R4 RS 02 B! EI
ZENEH

RZ

Ill
MOUNTED

RE
REG ULATO H
ADJUSTMENT

Farts Lacatian - External Voltage Regulator K T- 128 (Part No. 1U65534A 80)