Teac MV1421, Service Manual

Page: 57 / 130

5 5
10-3. NO PICTURE(RASTER OK)
10-4. NO COLOUR
CHECK VIDEO SIGNAL
AT PIN6 OF I501 (TDA8374)
CHECK DATA,CLOCK AT
PIN7,8 OF I501 ( TDA8374 )
CHECK VIDEO SIGNAL AT
PIN13 OF I501 ( TDA8374 ).
CHECK SIGNAL AT PIN48,
49 OF I501 ( TDA8374 )
CHECK TUNER VCC, DATA
CLOCK,MODULE RF(ANT01)
CHECK I701 AND ADJACE-
NT PATTERN.
CHECK R-Y, B-Y
IN/OUT AT PIN
29, 30, 31, 32 OF I501
CHECK QC504,
QC512
CHECK I502,
I503 AND VCC
CHECK SIGNAL
AT PIN 18,19,20,21
OF I501
NG
NG
NG
NG
OK
OK
OK
OK
OK
CHECK R-Y,B-Y SIGNAL
AT PIN 31,32 OF I501.
(TDA8374)
CHECK R,G,B SIGNAL
AT PIN 19,20,21 OF I501
CHECK R-Y, B-Y SIGNAL
AT PIN 29,30 OF I501
CHECK / REPLACE I901, I902
I903 ( CRT BOARD )
CHECK / REPLACE
I501 ( TDA8374 )
CHECK / REPLACE
I502 ( TDA4665 )
CHECK X501,X502
CC523,CC524,CC534
CC503,RC543
CHECK / REPLACE
I503 ( TDA8395 )
( SECAM )
CHECK SIGNAL AT
PIN38 OF I501.
NG
NG
NG
NG
OK
OK OK NG