FUNAI MAGNANOX BZV420MW8 Service Manual page 40

C
Is the video signal outputted to Pin(15) of IC2406?
Is the video signal outputted to the emitter of Q2391?
Yes
Check the line between Pin(15) of IC2406
and Q2391, and service it if defective.
Check the line between the emitter of Q2391 and
the video output terminal (JK2751), and service it
if defective.
FLOW CHART NO.11
Hi-Fi E-E audio does not operate normally.
Are the audio signals inputted to each pin of
IC2801?
IC2801 4,11PIN AUDIO-IN1 (REAR)
IC2801 5,14PIN AUDIO-IN2 (FRONT)
Are the audio signals outputted to Pin(3,13) of
IC2801?
Are the audio signals inputted to Pin(7,69) of
IC1451?
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?
Continued to D on the next page.
Yes
No
Yes
Yes
Yes
Yes
Yes
No
Is the "H" pulese inputted to Pin(9, 10, 11) of
IC2406?
Yes
Is 5V voltage supplied to
Pin(16) of IC2406?
Is 5V voltage supplied to
Pin(7) of IC2406?
No
Check the AL+5V, AL-5V line and service it if
defective.
Check the line between audio input terminal and
each pin of IC2801, and service it if defective.
No
→ JK2804
4,11PIN
IC2801
→ JK2800, JK2801
5,14PIN
IC2801
No
Are active level of Pin(9,10) of IC2801 become
as shown below?
INPUT
LINE(REAR)
LINE(FRONT)
Yes
Replace IC2801.
No
Check the line between Pin(3,13) of IC2801 and
Pin(7,69) of IC1451, and service it if defective.
No
Check the circuit of AL+5V, P-ON+5V(2) and
P-ON+9V, and service it if defective.
No
Check the line between Pin(37, 38) of IC1451 and
Pin(17,18) of IC1501, and service it if defective.
1-11-14
No
Replace IC1501.
Yes
Replace IC2406.
AUDIO-IN1 (REAR)
AUDIO-IN2 (FRONT)
9PIN 10PIN
L L
H L
No
Check the line between
Pin(9,10) of IC2801 and
Pin(60,61) of IC501, and
service it if defective.
E9E2ZLE