1 5
Dolby Pro-Logic
Ò
A/V Receiver
JSR-400
4) TEST TONE GENERATOR
The test tone generator generates a test tone (noise) to check the balance of sound output from each speaker in the Dolby
Pro-Logic mode. (This circuit is produced under license of the Dolby Laboritories Licensing Corp.) The test tone to the
loudspeakers at 2 second intervals in the following sequence: Left, Center, Right, Rear (both rear channels).
2. DIGITAL TUNING SYSTEM DESCRIPTION.
1) DIGITAL TUNING SYSTEM
FM FRONT END PACK
FM ANT
AM ANT
FM RF
AM RF
FM MIX
AM MIX
FM OSC
AM OSC
BUFFER
BUFFER
FM PLL Loop
AM PLL Loop
Low Pass Filter
Q201, 202
FM IN
AM IN
IC2
PLL Prescaler
CPU
IC1
Data
FL
Display
Key
Switch
Matrix
Adaptive
Matrix
Noise
Sequencer
Input
Auto-
Balance
Control
S
IC11
NJU9702
Time
Delay
IC10 NJW1102
L
B
C
S
Center/
Operating
Mode
Channel
L-ch
R-ch
C-ch
S-ch
Noise signal output
Fig. 5
Flow of noise signals within the system
Summary of Contents for JSR-400
Page 37: ...JSR400 MAIN PCB H G F F G H E D C B A A B C D E I I 1 JSR 400 PAGE 31 1 of 2...
Page 38: ...H G G H J I L M K O O P P L M I J K JSR 400 PAGE 31 2 of 2...
Page 39: ...JSR400 Con H G F F G H E D C B A A B C D E JSR 400 PAGE 32 1 of 2...
Page 40: ...JSR400 Control PCB IC1 H G G H L M K J I L M I J K JSR 400 PAGE 32 2 of 2...
Page 43: ...JSR400 SUB PCBs H G F F G H E D C B A A B C D E I I JSR 400 PAGE 34 1 of 2...
Page 44: ...H G F F G H E E L M K J I L M I J K JSR 400 PAGE 34 2 of 2...
