Read Sony PHA-1A / PHA-1AEU Service Manual online
PHA-1A/1AEU
PHA-1A/1AEU
16
16
• IC Block Diagrams
– MAIN Board –
IC301 WM8740SEDS/RV
IC301 WM8740SEDS/RV
IC402 PST8428UL
IC508, 705 PST8431UL
IC508, 705 PST8431UL
IC500 TPS61087DRCR
VOUTLP
3
2
1
11
4
8
20
19
BCKIN
DIN
LRCIN
VMIDR
MODE8X
9
AVDDR
6
DIFFHW
5
SCLK
7
DGND
DVDD
10
12
VOUTRP
13
VOUTRN
14
AGND
AGNDR
AVDDL
AGNDL
DIGITAL
FILTERS
SIGMA
DELTA
MODULATOR
RIGHT
DAC
LOW-PASS
FILTER
LOW-PASS
FILTER
CONTROL INTERFACE
18
VMIDL
17
VOUTLN
16
AV
D
D
15
28
ML/I2S
LEFT
DAC
SIGMA
DELTA
MODULATOR
SERIAL
INTERFACE
MUTING/
ATTENUATOR
MUTING/
ATTENUATOR
MUX
MUX
27
MC/DM1
26
MD/DM0
25
MUTEB
24
MODE
23
CSBIWO
21
ZERO
22
RSTB
GND 1
VDD 2
+
–
–
VREF
OUT
4
CD
3
1
COMP
4
AGND
5
PGND
2
FB
3
EN
6
SW
10
SS
7
SW
8
IN
9
FREQ
+
–
T-off GENERATOR
PWM
GENERATOR
GM
AMPLIFIER
T-on
Vref
CURRENT LIMIT
AND
SOFT START
GATE DRIVER OF
POWER
TRANSISTOR
UVLO
THERMAL SHUTDOWN
–
+
IC501 MAX1846EUB+T
IC503 TPS7A3301RGWR
IC504 MM3411A50URE
IC510, 512 MM3411A33URE
IC510, 512 MM3411A33URE
IC502 TPS7A4700RGWR
VL 1
FREQ 2
COMP 3
REF 4
FB 5
10 IN
9 EXT
8 CS
7 PGND
7 PGND
6 GND
STARTUP
CIRCUITRY
CONTROL
CIRCUITRY
VL
REGULATOR
SLOPE
COMP
UNDER-
VOLTAGE
LOCK OUT
ERROR
COMPARATOR
CURRENT
SENSE
AMPLIFIER
EXT
DRIVER
ERROR
AMPLIFIER
OSCILLATOR
SOFT-START
REFERENCE
+
+
+ +
1
OUT
2
NC
3
SENSE
4
6P4V2
5
6P4V1
6
3P2V
7
GND
8
1P6V
9
0P8V
10
0P4V
20
OUT
19
NC
18
NC
17
NC
16
IN
15 IN
14 NR
13 EN
13 EN
12 0P1V
11 0P2V
11 0P2V
CURRENT
LIMIT
FAST
CHARGE
THERMAL
SHUTDOWN
UVLO
BAND GAP
+
+
+
–
1
OUT
2
NC
3
FB
4
NC
5
NC
6
NC
7
GND
8
NC
9
NC
10
NC
20
OUT
19
NC
18
NC
17
NC
16
IN
15 IN
14 NR/SS
13 EN
12 NC
11 NC
12 NC
11 NC
–
+
+
–
CURRENT
LIMIT
THERMAL
SHUTDOWN
ENABLE
UVLO
BAND GAP
PASS DEVICE
ERROR
AMP
VOUT
3
CE 1
GND 2
VDD
4
+
–
VOLTAGE
REFERENCE
CURRENT
LIMIT
BIAS
IC505 NJM2827F3-05 (TE1)
IC507 RP402N501E-TR-FE
IC506 RP601Z330A-E2-F
5
CS
4
NC
2
VIN
3
VOUT
1
GND
BAND GAP
REFERENCE
CURRENT
LIMIT
THERMAL
PROTECTION
A1
A2
A2
MODE
GND
AVIN
PVIN
BP
GND
BULX
BULX
VOUT
VOUT
GND
PG
BOLX
BOLX
BOLX
GND
CE
CE
UVLO
TSHUT
PG
BUCK/BOOST
CTRL
MODE CTRL
A3
A4
A4
B1
B2
B3 B4
C1
C2
C3
C4
D1
D2
D3
D4
1
LX
2
GND
3
CE
4
VIN
5
VOUT
SWITCHING
CONTROLLER
PWM
CONTROLLER
–
+
OSCILLATOR
OVER VOLTAGE
PROTECTION
VFM
CONTROLLER
CHIP
ENABLE
SOFT
START
VREF
REVERSE
DETECTOR
POWER
CONTROLLER
STARTUP
CIRCUIT
BACKGATE
CONTROLLER
RAMP
COMPENSATION
CURRENT
PROTECTION
CURRENT
FEEDBACK
SHORT
PROTECTION
LATCH
TIMER
TIMER
+
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