Motorola ts 592 service manual

Page 1

N0 VIDEO

Switch tuner to unused channel. Does snow

appear?
I I
YES NO

I

Check voltage at test point
"B", (green wire). Does it
go to 20 volts or less with
signal?

I 1
YES - NO

I

C h a nge AGC
amplifier 012.

Check voltage at collector
of AGC amplifier 012.
Does it go to about 8 volts
with signal?

N0 AUDIO

speaker?

Turn volume control to maximum. Touch
base of 08 with metal tool. ls noise heard in

YES

I I
YES NO

Change AGC gate
011.

YES

I

Change video
output 05.

Using Mosquito or buzz-it
generator, touch base of
07. Is noise heard from
speaker?

Check collector voltage of
video amplifier 04 with no
signal. Is it aboutrl'e volts?

I I

YES NO

I

Change 06 Ist
video IF tran-
sistor.

Check collector voltage of
each video IF amplifier
03, 02 and Q1. Replace
the one which has a
collector voltage of more
than 25 volts. or less than
20 volts.

NO

I

Change 07 2nd
audio IF tran~
sistor.

Change the video
amplifier 04.

Change audio output
transistor 010.

PART NO.68P65111 Asa-o

YES

N0

Check emitter voltage of
audio output transistor
010. Is it about 3 volts?

YES NO

I

Change audio
amplifier tran-
sistorQB.

Check collector voltage of
audio driver transistor 09.
Is it about 22 volts?

i

Change audio driver
transistor 09.

PRINTED IN USA.

TROUBLESHOOTING
PROCEDURES
FOR

TS-592/612
GHIISSIS

MOTOROLA

BHIIIEI ii-W TELEVISION

Except Rectifier

Page 2

INDEX

TROUBLESHOOTING BY TRANSISTOR ISOLATION

Page To help determine whether a TS-592 or TS-612 chassis can be fixed
TS'592/612 TOP CHASSIS LAYOUT --------------- 1 in the home or should go to the shop, several troubleshooting charts
have been written as an aide in isolating a defective transistor stage.
TROUBLESHOOTING BY TRANSISTOR ISOLATION ..... 2 The same Procedure can be sad in the Shop-
The primary function of the charts is to direct you to the defective
TROUBLESHOOTING CHARTS stage by process of elimination." An important prerequisite in using
these charts is to define the receivers symptom accurately.
1. NO RASTER ............................ 3
On each troubleshooting chart is a series of blocks. Each block
2 NO VIDEO contains a suggested action related to the symptoms described and a
' """""""""""""""" 4 question. The question asks the results obtained from the action.
You are directed to the next block by answering the question with a
3. NO AUDIO ,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 5 yes or no. The last block on the chart gives the conclusion.
These charts can be used effectively with very little knowledge of the
receivers circuitry. Also, the only equipment required is an accurate
VTVM or 20,000 ohm/v VOM.
P1.) A16 0R sz AZB A1U PICTURE TUBE
AGC DELAY 1ST IF AMP AGC GATE 3RD lF AMP A2T REP 21GCP4. 222P4 0R 23JEP4
A2T AGc PIC A1G 0R A2Y M4842 1ST VIDEO AMP, LACE WITH SAME TYPE As ORIulNALLY IN SET
2ND MC AMP DELAY ADJ. AGC AMP 2ND IF AMP NOISE GATE / P1c E503
.- I ' HORIz PULSE
0" SHAPER E504 Homz
t AIM 170v BOOST DAMPER
HORIZ
um: TUNER O 012 O 03 Dan, sounc: REcT
TRANSISTOR 'l'.P. B 02 O m A3T
IN.SIDE| AGE / LINGERING *
A1N Q10 -> 013 SPOT KILLER 018
AUDIO I E: IO 0 A3HI-I'i
OUTPUT (9 0011 -02% HORIZ
'----- o o o
VHF TUNER 8 T301 OT300 06 T100 COLL. 1 OUTPUT
TRANSISTORS l O ' " "
INSIDE RATIO Q7 _ O . A18 3 E502
I DET 014 VIDEO I PULSE
ML. 022 C ) T200 ouwur J LIMITER
AUDIO O _ C 1
AMP L__.__._. \4 5M6 E
A1L---"'IT' TRAP ;
AUDIO
DRIVER / E C B _ _ r] :E\
J \
AIC . U
VERT INTERSTAGE M4842 \D1c E802 £803 L503
OUTPUT P1 J VERT DISCHARGE 1ST 4.5MC AMP AFC 3+ RECT DIODES HORIZ SIZE con.
A1V VERT DISCHARGE (v.0.2) A1V A.T.O. '095 A3F
VERT DRIVER ND. 1) SYNC SEP 4.5MC TRAP HORIZ 036

NO RASTER

Is there any high voltage?

Check voltage on
CRT.

I 1
YES NO
_J Measure collector voltage
of horizontal driver

transistor, 017. Is this
voltage --

25 to 60 volts?

-too high? -- too low.7

.-_I

Check horizontal
output transistor
018 for short.
R e p l a c e i f
shorted.

Measure collector of
horizontal pulse shaper
transistor 016 with the
base of horizontal driver
017 shorted to ground. Is

Short base to
e m i t t e r of
horizontal driver

transistor 017,
1 Does collector

this voltage -- voltage rise?
10 volts?
«too high.7 -- too low?

- YES NO

Change horizon-
tal driver tran-
sistor 017.

Measure collector voltage
of pulse shaper transistor
016. Short base to
emitter. Does this voltage
go to zero?

I

Change horizon-
tal driver tran-
sistor 017.

C h a n ge p u lse
shaper transistor
Q16.

Measure emitter voltage of
horizontal oscillator 015.
Is this voltage «

-I.5 t0'2.0 volts?

«too high? >-

too low?

I__I_.

Change pulse shaper 016. I

Change horizontal
oscillator 015.