DOWNLOAD Sony DSC-F1 (serv.man2) Service Manual ↓ Size: 330.5 KB | Pages: 43 in PDF or view online for FREE

— 33 —

There are three types of data communication.

• PRINT...IrDA

The image data of DSC-F1 can directly be sent to the digital color printer (DPP-M55) and printed.

• TRANSFER (Dubbing)...IrDA

Image data can be dubbed by IrDA by facing two DSC-F1 units at each other.

• Data communication with PC...IrDA/connection cable

Data communication of image data can be carried out with PC. The switching between IrDA and the connection cable is

carried out by the WIRELESS setting on the PLAY menu.

When data communication cannot be performed, check the following four.

1

Data communication with PC cannot be performed with the connection cable when the WIRELESS setting on the PLAY

menu is ON.On the other hand, if set to OFF, data communication with PC cannot be performed with IrDA.

For print and transfer, data communication with IrDA is automatically performed regardless of the setting of WIRELESS.

2

When performing data transmission and reception with the connection cable, always set the PC transmission rate and DSC-

F1 transmission rate the same. If different, data cannot be transmitted.

When receiving data with IrDA (infrared ray), the data transmission rate is automatically set by bi-directional

communication and thus need not be set manually.

3

When using IrDA, the IrDA setting must be set properly on the PC or communication will not be carried out correctly.
In particular, check if the IrDA driver of the PC is effective.
If the IrDA driver is not provided with the PC, install the IrDA driver (Integrated Communication Driver ver 2.0) in the disk

provided.

If a separate IrDA device from DSC-F1 is available, perform IrDA communication with it, and check if IrDA operates

normally.

4

The data transmitted from DSC-F1 contains commands peculiar to DSC-F1.
Therefore data communication with the PC cannot be performed if the software provided with the connecting kit is not used

regardless of the connecting method (cable/IrDA).

The DSC-F1 data can be sent to the PC by using the software provided with the digital color printer (DPP-M55).

— 34 —

• PRINT (IrDA)

When printing from DSC-F1 to DPP-M55, image data decoded with JPEG compression is transmitted.
Due to the slow transmission rate (IrDA:115 Kbps), data transmission takes about 85 seconds per image. After one data

transmission, the next is started after the DPP-M55 completes printing (takes about 70 seconds), it takes about 3 minutes to
print one image totally.

• TRANSFER (IrDA)

When transmitting data between two DSC-F1s, the data is transmitted in the JPEG compressed form.
As a result, the time for transmitting image data differs according to the image quality.
Using the infrared wire (IrDA:1.15 Mbps), one image can be dubbed in about 6 to 15 seconds.

• Data communication with PC (IrDA)

Data is transmitted in the JPEG compressed form between DSC-F1 and PC when using IrDA. The transmission rate is

normally 115 Kbps.

115 kbps is the transmission rate of the IrDA driver of general PCs. When using other types of IrDA drivers, their
transmission rates will be set (9.6 kbps to 1.152 Mbps).

• Data communication with PC (Connectin cable)

When the DIGITAL I/O terminal of DSC-F1 and PC is connected with a cable, the image data is transmitted in the JPEG

compressed form. Three types of transmission rates can be selected from the menu screen (9600/19200/38400 bps).

PRINT

(IrDA)

TRANSFER

(IrDA)

DATA COMMUNICATION

(IrDA)

DATA COMMUNICATION

(DIGITAL I/O)

TRANSMITTED DATA

Not compressed

JPEG compressed

JPEG compressed

JPEG compressed

TRANSMISSION RATE

(bps)

115 k

1.15M

115k

9.6k — 38.4k

TRANSMISSION TIME/IMAGE

Approx. 85 seconds

Approx. 6 to 16 seconds

15 to 50 seconds

15 to 135 seconds

— 35 —

When the WIRELESS setting is set to OFF at the PLAY menu, the IrDA circuit cannot be used.
(IrDA communication cannot be performed with the PC.)
However, when executing print/transfer, the IrDA circuit can be used even if the WIRELESS setting is OFF.

The compressed image data read from the image memory (IC771) is output from the main microprocessor (IC602) to the

buffer (IC701). In the buffer, the 3V microprocessor output signal is converted to 5V, and output to the IrDA interface
(IC706).

Likewise, control signals such as XIRSD signal and XIRCS signal output from the address decoder (IC607) are converted

from 3V to 5V by the inverter (IC702, IC703, IC705) and level converter (Q701). IC704 is an inverter which oscillates X701
(36.864 MHz).

The image data is converted to the IrDA signal by the IrDA interface (IC706). The IrDA signal is output to the IrDA (T)

board and transmitted from the infrared unit (IC801). When the infrared unit operates, the power shutdown signal (CN801, Pin
5 PSD) becomes L, the power switch (Q801) turns ON, and Pin 6 of IC801 becomes H.

When the IrDA function is not used, the XIRSD signal becomes L, Q701 turns ON, and the clock for IC706 (36.864 MHz,

X701) stops.

The data read from the image memory is data-expanded by the JPEG decoder (IC503) and sent from the main

microprocessor to the buffer (IC701).

The following operations are the same as (i).

— 36 —

Image data can be transmitted from the DIGITAL I/O terminal using connection cables.

Compressed MD data format image data stored in the image memory (IC771) is read, converted to RS232C signal data

inside the main microprocessor (IC602), and output to the RS232C driver (IC601).

The RS232C driver (IC601) is a level converter which converts the voltage for the microprocessor (IC602) and input/output

voltage for the digital I/O terminal.

It therefore raises the signal output from the main microprocessor (0 to 3V) to the voltage for digital I/O communication

(approx. ±5V), and outputs it to the digital I/O terminal. During signal input, it lowers the digital I/O terminal input voltage
(approx. ±10V), and outputs to the main microprocessor.

As DSC-F1 is intended for connecting to PC, data transmission may not be possible if connected to a modem.
When connecting to a modem, first send the data from DSC-F1 to the PC, and then connect the modem to the PC and

transmit the data.