Audio System (Fp-121 Board, Ifa-11 Board, Apr-59 Board, Al-43 Board, And Axm-24 Board) - Sony HDW-750 Maintenance Manual

1-26. Circuit Description
1-26-4. Audio System
1-26-4. Audio System
(FP-121 Board, IFA-11 Board, APR-59 Board, AL-43 Board,
and AXM-24 Board)
The audio system consists of the following blocks.
. Front microphone block (IFA-11 Board)
. Signal switch block (FP-121 Board)
. CH1, CH2 manual control block (FP-121 Board)
. AGC and amplifier block for CH1 to CH4 (FP-121 Board)
. A/D converter block for CH1 to CH4 (FP-121 Board)
. Delay processing block (APR-59 Board)
. Monitor amplifier block (APR-59 Board)
. D/A and filter block (FP-121 Board)
. OUT_Limiter and amplifier block (FP-121 Board)
. Final stage amplifier block (AL-43 Board)
. Rear input block (AXM-24 Board)
MA-103
CN501
MIC
CN501
CN502
LENS
SW-1031
CN503
MIC CONT
VTR START
AUTO W/B BAL
SHUTTER
CN504
PSW
1-68
CNB-15
AXM-24
OUT CN401
IN
CN401
IN
CN109
CN109
CN117
RX-54
CN117
IFA-11
CN120
2
I C
CN120
PCF8574
X24C02P
Fig.1 Audio system, frame diagram
CN403
AL-43
KY-475
CN402
CN207
CN207
TEST
MB-898
CN208
FP-121
CN107
2
I C
CN107
CN106
CN106
CN105
2
I C
CN105
CN201
CN201
APR-59
TURBO_GAIN_SW
2 ASSIGNABLE_SW1
I C
ASSIGNABLE_SW2
DCP-28
DVP-18
HP-104
CN205
CN205
SW-1038
CN204
STBY/SAVE
OFF/ON-PAGE
LOW/M/HIGH
PRST/ITEM
PRESET A/B
PCF8574
DCC-BRA
CN204
PCF8574
CN203
3 ENC-61
CN203
CN202
MS
3
CN202
CN206
FAN
CN301
HP-103
CN301
CN302
SPEAKER
HDW-750/750CE V1