Audio Block (Ha-3 Chassis); Signal Flow - Sony KD-34XBR2 Training Manual

Refer to the audio block Figure 12-1 for the description and board flow of the audio processing.

Signal Flow

•
The audio input signal hops from the B board to the S, and finally to the A where the output amplifiers are
located. The audio can either output the internal speakers or the rear panel phono jacks when the speakers
are turned OFF (from the menu).
D4408
11V
IC4401
IC4402
IC4403
IC4404
S BD.
CN4401/
CN003
AUDIO
OUT
AUDIO 5
AUDIO 6
U BD.
AUDIO 1,3,4
MONITOR
OUT
OUT 3
AUDIO2
CN008/
H B BD.
CN1200
B Board
There are three audio sources input to the B board:
•
Analog TV tuners
•
Video / audio jacks
•
Digital tuner
On the B board, a single selection is made and both Sel_L and Sel_R audio channels pass through the A board
for processing within the S board.

Audio Block (HA-3 Chassis)

CN4401/
CN4402
IC4403
AUDIO
IC4404
PROCESS
LPF
IC4401
TRUSURROUND
IC4402
V/F BUGGER
B BD.
L,R
IC402
LEFT CH. SW. SEL_L,
SEL_R
IC403
RIGHT CH. SW.
ST_L,
IC401
ST_R
A/V SW.
D MIX_L,
D MIX_R
FIGURE 12-1 - AUDIO BLOCK - HA-3 CHASSIS
SUB
9V
IC4405
OUTPUT
AUDIO
AMP. H
24V
(D BD).
Q4403,10
Q4405-7
Q4401-2
MUTE
A MUTE
IC001-MAIN
L,R
MICRO
B BD. SPKRS.
0V = ON
5V = OFF
ANALOG
TUNER
DIGITAL
TUNER
CN009/
& PROCESS
CN7402
60
12. Audio Block
L/R
TWEETER
IC4406
AMP. W
L/R
MID-RANGE
CN4404
AUDIO
24V
(D BD).
D4416
22V
D4415
22V
A BD.
QM BD.
6TVP12 1329 9/4/01
SPKRS