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The remaining play time of the battery indicates the time until the battery dead mark starts blinking.
When this mark starts blinking, the unit will no longer be able to perform operations such as shooting, etc.

When no operations are performed at all while using the rechargeable battery, the power will go OFF after the shooting

mode is set for approximately 2 minutes and the playback mode for approximately 4 minutes.

The power will not go OFF while the AC adapter is used.

Power supply which backs up clock data. When the backup power supply is turned OFF, the clock will be reset. Even when

the backup power supply is turned OFF, the shot image data will be preserved.

• Super capacitor (C072)

A super capacitors incorporated in the unit as a backup power supply for short periods of time such as during battery

replacement, etc. When connected to other power supplies, this capacitor will always be charged, and is thus able to backup
the clock function for approximately 10 minutes when all power supplies have been removed.

• Lithium ion rechargeable battery

No special power supply to backup the clock function for a long period of time is provided in particular. Therefore, always

connect the lithium ion rechargeable battery (LIP-10) to the unit.

When storing the DSC-F1 for a long period of time, leave the lithium ion rechargeable battery attached.
In the fully charged state, the rechargeable battery will preserve the clock data for approximately 7 months. Even when the

battery empty mark is displayed, by leaving the rechargeable battery inside the unit, the data will be preserved for
approximately 2 months.

In normal usage, the lithium ion rechargeable battery can only be used to 2.5V.
If the current is slightly over ten µA for clock use, a slightly lower voltage can be used.
To store the DSC-F1 for a long period of time, the terminal voltage of the lithium ion rechargeable battery is lowered to

around 1.6V.

Chargeable batteries with lowered voltage can be used by recharging it again. Because trickle charging is performed at first,

the charge time will be long.

During Shooting

Approx. 20 minutes

During Playback

Approx. 45 minutes

LIP-10

Two types of power supplies can be used.

• AC adapter (AC-DSC1)

: 6V

• Lithium ion rechargeable battery (LIP-10)

: 2.8 to 4.2V

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The input voltage from the AC adapter is supplied from the DC jack. The power supply voltage passes through the line

filter (LF001) and fuse to become the UNREG voltage.

Circuits causing the malfunction can be separated from the blown fuse. F001 of the DD board is for the PWM controller

(IC004), 3.1V voltage, and LCD transformer, while F002 is for the 5V voltage and charge circuit. F003 is for the backlight and
2.8V voltage.

The plus side of the lithium ion rechargeable battery is connected to the plus side of the DC jack. If the DC jack is not

connected to anything, the minus side (LIBATT) will contact the GND at the contact point inside the DC jack (See Fig. 2).
However, if a plug is connected to the DC jack, the contact point inside the DC jack will separate, and the minus side will
separate from the GND.

• When connecting the AC adapter to the outlet

The unit operates on the AC adapter voltage.
When the charge circuit is operating, the minus side of the rechargeable battery is connected to the GND via the charge

circuit, and a current flows to the rechargeable battery.

• When no connecting the AC adapter to the outlet

In this state, the minus side of the rechargeable battery is connected to the GND via the Q002 collector-base (functions as

a diode), and current flows to the minus side of the rechargeable battery from the GND.

Consequently, because a low rechargeable battery voltage is detected due to the diode voltage included, the voltage is taken

as to have dropped even if there is still rechargeable battery power, and the operating time shortens.

When not connecting the AC adapter to the outlet, be sure to disconnect the DC plug.

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Refer to the service manual for the circuit diagram.

• Starting the 3.2V REG

When the power supply is connected, the UNREG voltage from Pin !¶ of CN304 is supplied to the HV board. At this time,

Q309 turns ON instantaneously, Pin 2 of the 3.2V REG (IC305) becomes L, and IC305 is started.

When IC305 outputs the voltage for the microprocessor, and the microprocessor is started, Q309 is set to ON continuously

by the H output of the SLEEP terminal (Pin ^¶ of IC301) to maintain the IC305 operations.

• Output of voltage for HI microprocessor (3.2V)

When the UNREG voltage is lower than 3.7V, it is stepped up by the switching of Pin 8 of IC305. When the UNREG

voltage is higher than 3.7V, it is stepped down by the series regulator inside IC305. The 3.2V output from Pin 5 of IC305
becomes the voltage for the HI microprocessor.

When the mode switch is OFF and the battery is not charged, the output of the voltage for the HI microprocessor is stopped

periodically by IC304. When the microprocessor voltage drops below 2.8V, Pin 1 of IC304 becomes L, and the operations of
the 3.2V REG (IC305) are restarted. Consequently, the microprocessor voltage changes between 2.8V and 3.2V periodically.

• Detection of decrease in UNREG voltage

When the power supply voltage (UNREG voltage) drops below 2.8V, Pin 1 of IC306 becomes L, and is detected by the

XMAINSLP terminal (Pin &• of IC301) of the microprocessor. As a result, IC301 sets into the sleep mode, and the power of
the unit cannot be turned ON.

When a voltage input is not present at all since the power supply is pulled out, Q314 turns ON by the back up capacitor

voltage to keep the XMAINSLP terminal at L. As a result, the microprocessor continues the sleep operation.

• Voltage control during sleep mode

In the sleep mode, the 2.8V REG (IC304) controls the ON/OFF of IC305, so that the voltage for the microprocessor is

controlled between 2.8V and 3.2V. For this reason, the microprocessor voltage changes periodically in the sleep mode.

• Low voltage operation of microprocessor voltage

When the battery terminal voltage becomes 1.6V, the HI microprocessor voltage also drops.
When the voltage for the HI microprocessor drops below 2.6V, it is detected by the 2.6V DET (IC303), and the XHIRESET

terminal becomes L, and as a result, the HI microprocessor is reset. At the same time, the time is also reset.

• Backup capacitor for clock (super capacitor)

When all the external power supplies are disconnected, voltage is supplied from the backup capacitor (C072) to the HI

microprocessor. At this time, Q310 will go OFF so that the voltage is not supplied from C072 to the 3.2V REG (IC305).