Read Sharp BD-HP21H (serv.man2) Service Manual online
BD-HP21U/S/H/A/X/RU/SB,BD-HP50U/X
2 – 16
The LED mode display indicator fails to light up.
* White LED: Blinking while the disc is being loaded.
* White LED: Blinking while the disc is being loaded.
Lights up when the disc has been recognized.
* Blue LED:
While the disc is being played back.
* White LED: When the quick start has been preset.
Is the "H" potential applied at the bases of Q1101 thru Q1104,
Q1106 and Q1107 according to the modes?
Q1106 and Q1107 according to the modes?
NO
NO
Check the line between SC1102 and the base of each transistor.
Is there the "H" potential output at the following pins according
to the modes: Pin (54), (LED_BD_MODE), pin (57)
(LED_DVD_MODE), pin (55) (LED_BD_MODE), pin (58)
(LED_DVD_PLAY) and pin (52) (LED_QUICK_START), all on
IC2504?
to the modes: Pin (54), (LED_BD_MODE), pin (57)
(LED_DVD_MODE), pin (55) (LED_BD_MODE), pin (58)
(LED_DVD_PLAY) and pin (52) (LED_QUICK_START), all on
IC2504?
Check IC2504 and its peripheral circuits. Or replace IC2504
as required.
as required.
Check the line between IC2504 and P2503.
YES
Is there the "H" potential at the following pins according to the
modes: Pin (3), (LED_BD_MODE), pin (4) (LED_BD_PLAY),
pin (5) (LED_DVD_MODE), pin (6) (LED_DVD_PLAY) and
pin (7) (LED_QUICK_START), all on SC1102?
modes: Pin (3), (LED_BD_MODE), pin (4) (LED_BD_PLAY),
pin (5) (LED_DVD_MODE), pin (6) (LED_DVD_PLAY) and
pin (7) (LED_QUICK_START), all on SC1102?
YES
Check each transistor, LED and the current-limiting resistor.
YES
NO
Is there the "H" potential at the following pins according to the
modes: Pin (3), (LED_BD_MODE), pin (4) (LED_BD_PLAY),
modes: Pin (3), (LED_BD_MODE), pin (4) (LED_BD_PLAY),
pin (5) (LED_DVD_MODE), pin (6) (LED_DVD_PLAY) and
pin (7) (LED_QUICK_START), all on P2503?
Check the line between P2503 and SC1102.
YES
NO
FLOW CHART No.5
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