Goldstar MBM-2105GIA service manual Troubleshooting Guide

TROUBLESHOOTING GUIDE

TR902, TR903. D905. TR901 A N D P O W E R

REG CIRCUIT ~. 7

I D706, c713. c714. c715

Y E S

, C H E C K C R T (GZ) V O L T A G E 4 5 0 V N O

2C H E C K C R T ( H E A T E R ) V O L T A G E 12V

Y E S

C H E C K C R T CATHOD V O L T A G E		A B O V E 55V
45-55v
	Y E S

-,

*

TROUBLE IN FBT. CR706 R712

L E A D (HI,. L E A D (Vl, V2)

TROUBLE IN

T R 3 0 3 , TR304. R311. R309. R310. R315, R314, R312

VR703	(SUB-BRIGHT,, R710.	R711.	“R301 (CONTRAST,,	HORIZONTAWERTICAL
				SYNC TROUBLE
VI?,05	(MT B R I G H T , , TRW,	TR302.	V I D E O C A B L E		I

S Y N C T R O U B L E		REF.	NO.	FIGURE	OEBCRIPTION
		TR301.	TR302.	B	K T C	,015
TROUBLE	IN	TR902,			KTC	1959
					K T A	562TM
R719. C716.	R70B, R720.	TR903.		-C
		TR601		w	K T C 1815
				L
I		TR304			KTC	2229
				t k B
				c
				>
		TR701.			B U	806
		TWO1		9	K T D 880
				BCE
		IC701			T E A	2037A
I				l@a
		TR303			2N 3904
				-0
				E