Sony NW-HD5 (serv.man2) Service Manual ▷ View online
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3
1. Power Control Circuit
1-1. VB voltage
Fig.1-1 shows VB voltage generator circuit. In this unit, there are 3 kinds of power sources shown in Table.1-1.
Table.1-1 Power Sources
Voltage
Power Source
DC-IN 6V
AC Power Adapter
Battery Voltage
Rechargeable Lithium-ion battery
VBUS Voltage (5[V])
PC
= During the battery driving =
The battery voltage is input to pin-5 and pin-6 [BAT] of Charge Control IC9002. During the battery driving, the controller section inside IC9002 does not start-up.
The battery voltage is output from Pin-15, Pin-16 and Pin-17[OUT] to the unit as VB voltage.
= During the AC power adapter driving =
DC-IN 6V voltage which is supplied from AC power adapter is input to Pin-4 [AC] of Charge Control IC9002 and is also input to Pin-9 [CE] of IC9002 via D9008.
Then, IC9002 starts up. When IC9002 starts up, IC9002 creates 4.4[V] from 6[V] and outputs 4.4[V] from Pin-15, Pin-16 and Pin-17 [OUT] to the unit as VB voltage.
= During the VBUS voltage driving =
VBUS voltage which is supplied from PC is input to Pin-20 [USB] of Charge Control IC9002 and is also input to Pin-9 [CE] of IC9002 via D9008. Then, IC9002 starts up.
When IC9002 starts up, IC9002 outputs VBUS voltage from Pin-15, Pin-16 and Pin-17 [OUT] to the unit as VB voltage.
The unit does not operate without inserting the battery even if the power from AC power adapter is supplied to the unit.
The message “BATTERY IS MISSING” appears on LCD of the unit.
If the power from AC power adapter is supplied to the unit and the unit is connected to PC, the unit operates with DC-IN 6V voltage which is
supplied from AC power adapter. (The unit charges the battery with DC-IN 6V voltage, not with VBUS voltage.)
This unit can operate with VBUS voltage which is supplied from PC. But, SONY does not guarantee the operation with VBUS voltage.
Recommend customers to use AC power adapter.
One Point
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4
1. MAIN SYSTEM CONTROLLER IC1003
When MAIN SYSTEM CONTROLLER IC1003 starts up, it outputs “H” signal from Pin-147[PQ1/FFCLR]. By this “H” signal, the switch inside IC1001 is turned “ON”. Then
XDCIN_DET signal is input to Pin-150 [PQ4] of MAIN SYSTEM CONTROLLER IC1003. IC1003 detects whether the driving voltage is the battery voltage or DC-IN 6V voltage
supplied from AC power adapter by using the input voltage shown in Table.1-2.
Table.1-2 Detecting DC-IN 6V voltage
IC1003 Pin-150 [PQ4]
Description
L
DC-IN 6V voltage is supplied.
H
DC-IN 6V voltage is not supplied.
2. System Controller Circuit inside IC9003
When any of the input signals to pin-2 [XWK4] through pin-5 [XWK1] of Power Control IC9003 changes from “H” to “L”, the system controller section inside IC9003 wakes up.
The “wake-up conditions” of the unit is shown in Table 1-3.
Table.1-3 Wake-up conditions
Pin-5 [XWK1] of IC9003
Pin-4 [XWK2] of IC9003
Pin-3 [XWK3] of IC9003
Pin-2 [XWK4] of IC9003
Condition
When any key of the remote controller is
pressed
pressed
When any key of the unit is
pressed
pressed
When VBUS voltage is supplied
to the unit. (Refer to Fig.1-1)
to the unit. (Refer to Fig.1-1)
When DC-IN 6V voltage is
supplied to the unit from AC
power adapter.
(Refer to Fig.1-1)
supplied to the unit from AC
power adapter.
(Refer to Fig.1-1)
3. MAIN SYSTEM CONTROLLER IC1003
MAIN SYSTEM CONTROLLER IC1003 detects whether the battery is inserted or not by using the input status shown in Table.1-4.
Table.1-4 Battery Detection
IC1003 Pin-118 [PD0]
Description
H
Battery is inserted.
L
Battery is not inserted.
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5
Fig.1-1 VB voltage generator circuit
Copying is strictly prohibited
6
1-2. Generated Voltages List
Table.1-6 and Table.1-7 show the generated voltages lists of the unit.
Table.1-5 shows the differences of the generated voltages between NW-HD1 and NW-HD5.
Table.1-5 Differences between NW-HD1 and NW-HD5
Voltage Name
NW-HD1
NW-HD5
Remark
VG
6.0[V]
5.6[V]
-
REG_01
2.0[V]
1.9[V]
-
REG_03
Generated based on 1.8V
Generated based on REG_01.
1.8V
1.8V REGULATOR IC9003 is
mounted
mounted
1.8V REGULATOR IC is not
mounted. Instead of 1.8V, REG_01
is used.
mounted. Instead of 1.8V, REG_01
is used.
Not requiring 1.8V REGULATOR IC9003,
the design of NW-HD5 has the merits of parts
reduction and lower power consumption.
the design of NW-HD5 has the merits of parts
reduction and lower power consumption.
Table.1-6 Generated Voltages List - 1
Voltage Name
IC which generates the voltage
ICs which use the respective voltage
Test Point
BATT+
Rechargeable Lithium Ion Battery
CHARGE CONTROL IC9002
TP9010
DCIN6V (6[V])
AC power adapter
CHARGE CONTROL IC9002
-
VBUS
PC
-
USB CONTROLLER IC2001
-
CHARGE CONTROL IC9002
TP9018
VB
CHARGE CONTROL IC9002
-
POWER CONTROL IC9003
-
RTC IC9503
-
3.3V DC-DC CONVERTER IC9004
TP9003
VREF (1.275[V])
POWER CONTROL IC9003
POWER CONTROL IC9003
-
VG (5.6[V])
POWER CONTROL IC9003
POWER CONTROL IC9003
-
VSTB (VCO1: Wake-up mode)
POWER CONTROL IC9003
-
KEY SELECT SWITCH IC1001
-
KEY SELECT SWITCH IC1002
TP9014
VCO1 (2.4[V])
POWER CONTROL IC9003
-
MAIN SYSTEM CONTROLLER IC1003
-
Remote Controller
TP9015/TP4308
VC2 (1.2[V])
POWER CONTROL IC9003
-
MAIN SYSTEM CONTROLLER IC1003
-
MULTI INTERFACE IC7001
-
HP AMP. IC4301
TP9004
REG_01 (1.9[V])
POWER CONTROL IC9003
-
MAIN SYSTEM CONTROLLER IC1003
-
SUB SYSTEM CONTROLLER IC3001
-
MULTI INTERFACE IC7001
-
FLASH MEMORY IC1101
-
SD-RAM IC7002
-
BUFFER IC9502
-
RTC IC9503
TP9007
REG_03 (1.5[V])
POWER CONTROL IC9003
SUB SYSTEM CONTROLLER IC3001
TP9005