3-2
ELECTRICAL TROUBLESHOOTING GUIDE
No 5V_D
or 5V_A .
No 5.2VA.
Is 5.2VA section working?
(Is the
POWER CTL at
Pin6 High/low?)
Is oscillation present at the
Base of Q108?
Replace Q108.
Check D109, C123, R125,
R124.
Replace R102.
Replace BD101.
(Bridge rectifier)
Is R102(R104) normal?
Is about AC 100V applied to
IC101 Pin 3.
Check IC101.
Is 5.2V applied to IC102
Pin 1?
Is there a DC voltage at the
(+) terminal of BD101?
Check R127, 128.
(SHUTDOWN CKT)
1. Power(SMPS) Circuit
No FLD
Is 5.2VA section working?
Replace SMPS trans(T101).
Replace the inferior
components.
Are D109, L103 open?
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
A.
B.
NO
NO
Содержание T 572
Страница 1: ...NAD SERVICE MANUAL T 572 T 572 DVD VCD CD PLAYER DVD VCD CD PLAYER DRAFT DATE 30 OCT 2002 ...
Страница 35: ...3 29 3 30 6 TIMER KEY CIRCUIT DIAGRAM System not operate System not operate Remocon not operate ...
Страница 36: ...3 31 3 32 7 A V CIRCUIT DIAGRAM 02 03 19 R14137B ...
Страница 37: ...3 33 3 34 8 JACK CIRCUIT DIAGRAM T572AH ...
Страница 38: ...3 35 3 36 9 JACK CIRCUIT DIAGRAM T572C ...
Страница 41: ...3 41 3 42 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE BOTTOM SIDE TOP SIDE ...
Страница 48: ...MEMO ...
Страница 50: ...M E M O M E M O ...
Страница 66: ...MEMO ...