Toshiba D-VR7KC, Service Manual

Page: 39 / 115

1-10-16 E9KG0TR
FLOW CHART NO.11
Hi-Fi E-E audio does not operate normally.
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.
Yes
No
No
IC2801 AUDIO-IN1 (REAR) 4,11PIN
IC2801 AUDIO-IN2 (FRONT) 5,14PIN
IC2801 TU AUDIO 2,15PIN
AUDIO-IN1 (REAR)
AUDIO-IN2 (FRONT)
IC2801
→
JK2804 4,11PIN
IC2801
→
JK2800, JK2801 5,14PIN
Continued to C on the next page.
Yes
Yes
Check the line between Pin(29,30) of
IC5001 and Pin(2,15) of IC2801, and
replace P1 (BOARD MCV) if defective.
Are the audio signal outputted to Pin(29,30)
of IC5001?
Is the SIF signal inputted to Pin(21) of IC5001?
Replace TU5001.
No
No
Replace P1
(BOARD MCV).
Yes
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 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
Are active level of Pin(9,10) of IC2801 become
as shown below?
INPUT
LINE(REAR)
LINE(FRONT)
9PIN 10PIN
H H
L H
TUNER
VCR
H L
L L
Replace P1
(BOARD MCV).