CD73
COMPACT DISC PLAYER
- 7 -
RF PATTERN TESTING
ARCAM - CD73 PCB TESTING POINTS DIAGRAM
TESTING PROCEDURE
(1) Load the test disc (Sony Test CD YEDS-7) and set the unit into PLAY mode.
(2) Connect the scope to R227 (Pin 15 of U101) and DGND (R116).
Scope setting:
Coupling
: AC.
Vertical sensitivity
: 0.2 V/ div.
Horizontal time base
: 0.5 µS/div.
(3) Observe the waveform is 2.0V p-p +/-5% and the eye pattern is at its best shape (see
FIG. 1
).
FIG. 1 (a)
FIG. 1 (b) Poor eye pattern
FIG. 1 (C) Good eye pattern
3T 4T 5T — 11T
Содержание DiVA CD73
Страница 11: ...CD73 COMPACT DISC PLAYER 11 MAIN BOARD _ Component Side...
Страница 12: ...CD73 COMPACT DISC PLAYER 12 MAIN BOARD _ Solder Side...
Страница 19: ...CD73 COMPACT DISC PLAYER 19 IC BLOCK DIAGRAM KEY BOARD U701 M38B79FFFP...
Страница 24: ...CD73 COMPACT DISC PLAYER 24 MAIN BOARD U501 U502 U504 U506 U507 LM317T MAIN BOARD U503 U505 LM337T...
Страница 34: ...CD73 COMPACT DISC PLAYER 34 EXPLODED VIEW...
Страница 36: ...PEMBROKE AVENUE WATERBEACH CAMBRIDGE CB5 9PB ENGLAND www arcam co uk Sep 01 2003 P N AL040C SM00A...