Read Sharp XV-Z21000 (serv.man3) Service Manual online
XV-Z20000/XV-Z21000/DT-5000
5 – 4
The lamp is flashing blue continu-
ously.
ously.
Is a voltage of 2.5 V or more present
at pins TL6610 in the PC PWB unit?
at pins TL6610 in the PC PWB unit?
NO
Check IC2005 (sub-microcomputer) and
peripheral parts.
peripheral parts.
YES
Is a voltage of 3 V or more present at
TL6611 in the PC PWB unit?
TL6611 in the PC PWB unit?
YES
Check IC2005 (sub-microcomputer) and
peripheral parts.
peripheral parts.
NO
Are a 1 Vp-p clock signals present at
R8731, R8732 in the formatter unit?
R8731, R8732 in the formatter unit?
NO
Check X8701, Check the peripheral cir-
cuits of IC8711 and IC8712.
cuits of IC8711 and IC8712.
YES
Is power output of IC9701 and
IC9702 normal? (1.8V/1.2V/2.5V/
3.3V)
IC9702 normal? (1.8V/1.2V/2.5V/
3.3V)
NO
Check peripheral circuits of IC9701 and
IC9702.
IC9702.
YES
Is a pulse present at each address
pin of IC8602 and IC9602 in the for-
matter unit, immediately after turning
the power on?
pin of IC8602 and IC9602 in the for-
matter unit, immediately after turning
the power on?
NO
IC9101 is defective.
YES
Is a pulse being output to each data
pin of IC8602 and IC9602 in the for-
matter unit, immediately after turning
the power on?
pin of IC8602 and IC9602 in the for-
matter unit, immediately after turning
the power on?
NO
IC8602 or IC9602 is defective.
YES
Are IC8602 and IC9702 warm when
touching them?
touching them?
NO
Check IC8301 and IC9301 and peripheral
circuits of IC8601 and IC9601.
circuits of IC8601 and IC9601.
YES
Is a motor drive pulse present at pins
(2), (3), and (4) of P9701 in the for-
matter unit?
(2), (3), and (4) of P9701 in the for-
matter unit?
NO
Check IC9701 and its peripheral circuits.
YES
Is a pulse present at pin (4) of P8901
in the formatter unit?
in the formatter unit?
NO
The color wheel unit is defective.
YES
IC8301 or IC9301 is defective.
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