Toshiba D-VR610KU, Руководство по обслуживанию

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1-10-14 E9KGATR
C
FLOW CHART NO.11
Hi-Fi E-E audio does not operate normally.
Check the circuit of AL+5V, P-ON+5V(2) and
P-ON+9V, and replace P1 (BOARD MCV) or P3
(BOARD POWER SUPPLY) if defective. Is the 5V voltage supplied to Pin(5, 15, 32, 36, 46) of
IC1451, or the 9V voltage supplied to Pin(3) of IC1451?
Is the serial data and the clock signal supplied to
Pin(37, 38) of IC1451?
Yes
Yes
Yes
No
No
Check the line between Pin(37, 38) of IC1451 and
Pin(17,18) of IC1501, and replace P1 (BOARD
MCV) if defective.
Check the line between
Pin(9,10) of IC2801 and
Pin(60,61) of IC1501, and
replace P1 (BOARD MCV)
if defective.
Yes No
Are the audio signals inputted to each pin of
IC2801?
Check the line between audio input terminal and
each pin of IC2801, and replace P1 (BOARD MCV)
if defective.
Are the audio signals outputted to Pin(3,13) of
IC2801?
Are the audio signals inputted to Pin(7,69) of
IC1451?
Yes
Check the line between Pin(3,13) of IC2801 and
Pin(7,69) of IC1451, and replace P1 (BOARD
MCV) if defective.
No
No
No
IC2801 AUDIO-IN1 (REAR) 4,11PIN
IC2801 AUDIO-IN2 (FRONT) 5,14PIN
AUDIO-IN1 (REAR)
AUDIO-IN2 (FRONT)
IC2801
→
JK2804 4,11PIN
Are active level of Pin(9,10) of IC2801 become
as shown below?
IC2801
→
JK1232, JK1233 5,14PIN
INPUT
LINE(REAR)
LINE(FRONT)
9PIN 10PIN
H H
L H
Continued to D on the next page.
No
Check the line between Pin(15) of IC2406
and Q2391, and replace P1 (BOARD
MCV) if defective.
Is the video signal outputted to the emitter of Q2391?
Yes
Yes
No
Yes
No Yes
Yes
Is the video signal outputted to Pin(15) of IC2406?
Is the "H" pulese inputted to Pin(9, 10, 11) of
IC2406?
No
Check the AL+5V, AL-5V line and replace
P1 (BOARD MCV) or P3 (BOARD POWER
SUPPLY) if defective.
Is 5V voltage supplied to
Pin(16) of IC2406?
Is -5V voltage supplied to
Pin(7) of IC2406?
Check the line between the emitter of Q2391 and
the video output terminal (JK2751), and replace
P1 (BOARD MCV) if defective.
Replace P1
(BOARD MCV)
or P3 (BOARD
POWER SUPPLY).
Replace P1
(BOARD MCV).