NEC JC1402HME Service Manual page 36

•
7. LACK OF STABLE SYNCHRONIZATION
• HORIZONTAL
[ CHECK H.SYNC:
I
MEASURE THE VOLTAGES POINT CONNECTOR S7
ON THE INTERFACE PWB PWE-207B
_ OK _ _ _ SEE FIV CONVERTER CIRCUIT ITEM 6.a
NG CHECK SYNC. CIRCUIT
ON THE INTERFACE PWB PWE-207B
• VERTICAL
r
CHECK
V~SY~CJ
- - - - - -
MEASURE THE VOLTAGES POINT CONNECTOR S6
ON THE INTERFACE PWB PWE-207B
~ -.-~-~~
NG CHECK SYNC. CIRCUIT
I
ON THE INTERFACE PWB PWE-207B_
IC401 FAILURE
8. PICTURE SIZE
ABNORMAL HORIZONTAL WIDTH
1:~,~~~S~ol~-l
L
L505
~
ADJUSTED ON DEF PWB PWE-194
-----]-_.
ICH-ECK H-FIV CONVERTER ANOl
l!SSOCIATED CIRCUITRY
~
~~=J==------
rc·HECK H
WIDT~-l
L
CORRECT~~
j=
~Q
__
TR555
C514A.C5148,C515,C575
OK
[ CHEC-K S-CORRECTIONl
FOR H.DEF CIRCUIT __
J
FAILURE
------l--NG-
~::~:~~,~570
FAILURE
OK
DEF YOKE FAILURE
-34-
.-