Sony MDR NC60 - Headphones - Binaural, Руководство по обслуживанию

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MDR-NC60
14 14
MDR-NC60
•
Note for Printed Wiring Boards and Schematic Diagrams
Note on Schematic Diagram:
•
All capacitors are in
µ
F unless otherwise noted. (p: pF) 50 WV or
less are not indicated except for electrolytics and tantalums.
•
All resistors are in
Ω
and
1
/
4
W or less unless otherwise specified.
•
C
: panel designation.
•
A : B+ Line.
•
H : adjustment for repair.
•
Power voltage is dc 1.5 V and fed with regulated dc power supply
from battery terminal.
•
Voltages and waveform is dc with respect to ground under no-sig-
nal conditions.
•
Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production toler-
ances.
•
Waveform is taken with a oscilloscope.
Voltage variations may be noted due to normal production toler-
ances.
•
Circled numbers refer to waveform.
•
Signal path.
F : Audio (power off)
J : Audio (power on)
N
: Monitor
Note on Printed Wiring Boards:
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
(The other layer's pattens are not indicated.)
•
Waveform
Caution:
Pattern face side:
Parts on the pattern face side seen from
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.
1
ML Board IC52
1
(SW),
MR Board IC152
1
(SW),
1 V/DIV, 200 ns/DIV
4.3 Vp-p
1.05 ms
•
IC Block Diagrams
MR Board IC101
TK70520SCL-G
ML Board IC52
MR Board IC152
LTC3526BEDC#TR
ML Board IC6
MR Board IC106
LM4916LDX/NOPB
GATE DRIVES
AND
ANTI-CROSS
CONDUCTION
LOGIC
IPK
VSEL
IPK
COMP
MODE
CONTROL
WELL
SWITCH
VOUT 6
FB 5
SHDN 4
VIN 3
SW 1
GND 2
EXPOSED PAD
7
ERROR AMP
SLEEP COMP
IZERO
COMP
IZERO
CLK
WAKE
VREF
1 MHz
OSC
UVLO
VREF VREF
THERMAL
SHUTDOWN
SHUTDOWN SHUTDOWN
CLAMP
START-UP
VBEST
VB
ANTI-RING
OVER HEAT &
OVER CURRENT
PROTECTION
BANDGAP
REFERENCE
CONTROL
CIRCUIT
GND
VIN
2
5
VOUT
4
NP
3
VCONT
1
+
–
CLICK-POP &
MODE CONTROL
LOGIC
BIAS
GENERATOR
–
+
OUT B 7
GND 6
VDD 10
SE/BTL 8
OUT A 9
IN A 1
–
+ IN B 5
SD 2
MUTE 3
BYPASS 4