Diagrams; Block Diagram - Sony MDR-NC60 Service Manual

4-1. BLOCK DIAGRAM

HP BOARD
(INPUT)
MUTING
MIC2
(NOISE DETECT)
RV1
CANCELING
GAIN
MUTING
MIC102
(NOISE DETECT)
RV101
CANCELING
GAIN
• SIGNAL PATH
: AUDIO (POWER OFF)
: AUDIO (POWER ON)
: MONITOR
MDR-NC60
SECTION 4

DIAGRAMS

SWITCH
+2V (L)
Q1, 2
MIC AMP BUFFER BUFFER
+
IC2 IC3 IC4
Q3
MIC1
(MONITOR)
SWITCH
+2V (R)
Q101, 102
MIC AMP BUFFER BUFFER
+
IC102 IC103 IC104
Q103
MIC101
(MONITOR)
+2V
+B
+2V (L) REGULATOR
IC1
DC/DC CONVERTER
VCC (L)
IC52
+2V
+2V (R) REGULATOR
IC101
DC/DC CONVERTER B+ SWITCH
VCC (R)
IC152 Q151, 152
RV2
AMP GAIN
POWER AMP
IC6
MONITOR SWITCH
IC5
MN BOARD
MONITOR
VCC (L)
POWER AMP
IC106
RV102
AMP GAIN
MONITOR SWITCH
IC105
SW BOARD
POWER
LED DRIVE
Q201, 202
POWER
OFF ON
DRY BATTERY
SIZE "AAA"
(IEC DESIGNATION R03)
1PC. 1.5V
VOLTAGE
DETECT
IC151
13 13
SP1
(L-CH)
SP101
(R-CH)
MDR-NC60