29
6. CIRCUIT DESCRIPTION
OCP (OVER CURRENT PROTECTION) CIRCUIT
T h is c ircu it is d e s ig n e d to p ro te c t th e c ircu it fro m o v e r c u rre n t d u e to o v e rlo a d o c c u rre d a t th e re a r o f 1 3 4 V lin e .
1 . C O N F IG U R AT IO N O F O C P C IR C U IT
2 . E X P L A N AT IO N O F T H E O P E R AT IO N
T he re is ve ry little v olta g e d ro p a t R 8 1 7 ,R 8 1 8 (1W 0 .5 1 ) o f 1 3 4 V lin e .
In ca se tha t the o verlo ad occ urs at the re ar o f 1 34V line , the increase of the voltag e dro p at R 8 17& R 81 8
bring dow n the base volta ge o f th e Q 8 01 so as to drive th e Q 806 .
B e ca u s e o f th e o ve rlo a d at th e re a r o f th e R 8 2 1 , th e v o lta g e o f th e p oin t d e c re a se s . A n d th is m a k e s
Q 8 0 1 tu rn on so th a t a vo lta g e is a p p lie d to th e # 2 5 o f I5 0 1 .
In c a se th a t O C P o p e ra te s b y th e # 25 o f th e I5 0 1 , th e se t is p ro te c te d b y p o w e r o ff. (H _ P ulse o ff)
Summary of Contents for DTQ-29G1TS
Page 1: ......
Page 4: ...3 2 EXTERNAL VIEW MODEL NAME DTQ 29G1TS TSP DTQ 25G1TS TSP FRONT VIEW REAR VIEW...
Page 5: ...4 MODEL NAME DTQ 29G3TS TSP FRONT VIEW REAR VIEW...
Page 7: ...6 3 BLOCK DIAGRAM...
Page 16: ...15 5 IC DESCRIPTION I701 LC864720 32A M com 1 BLOCK DIAGRAM...
Page 20: ...19 I501 LA76070A IC VIDEO PROCESSOR 1 BLOCK DIAGRAM...
Page 23: ...22 4 BLOCK DIAGRAM PIN DESCRIPTION...
Page 26: ...25 5 BLOCK DIAGRAM 6 PIP TV SYSTEM BLOCK DIAGRAM...
Page 27: ...26 I601 TDA9852 CIC AUDIO PROCESSOR 1 BLOCK DIAGRAM PIN DESCRIPTIO N...
Page 33: ...32 7 TROUBLE SHOOTING GUIDE 7 1 NO POWER...
Page 68: ......
