Sony DWT-B30, Руководство по обслуживанию

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7-2 (E)
DWT-B30
High-frequency amplifier circuit (Reference Nos. 800 to 899)
IC814, Q801, and IC815 amplify the modulation signal and output it to the antenna connector (on the CN-
4088 board).
CPU (IC402 on a DPR-396 board) controls IC805 and IC807 and adjusts the output level of IC802 or the
gain of the amplifier circuit Q801.
When the high-frequency amplifier circuit is set to 25 mW output, switch ICs IC811 and IC812 are
switched so that the modulation signal passes through IC815.
EEPROM (IC803) memorizes destination information, CH plan data, or various adjusted values of the
amplifier circuit.
7-1-2. DPR-396 Board
System control circuit (A part of reference Nos. 400 to 499 and 500 to 599)
IC402 (CPU) performs the control of this unit system such as USB control, OLED display control, ex-
terna button recognition, FPGA configuration, and remote CPU control.
FPGA circuit (Reference Nos. 200 to 299)
IC201 (FPGA) performs digital processing such as audio LCF, audio compression processing, and digital
modulation (QPSK).
IC201 also generates the digital signal such as internal signal generator and BER measuring signals
(PN9).
I/Q DAC (Reference Nos. 300 to 399)
IC300 converts the digital signal, modulated and output using FPGA (IC201), into the analog I/Q signal.
Power circuit (A part of reference Nos. 700 to 799 and 200 to 299)
.
IC724 is the regulator that generates the power supply of
+
3.7 V from USB power supply.
.
IC721 is the step-up/down DC-DC converter that generates the power supply of
+
2.5 V, used in the
FPGA, from the power supply of
+
3.7 V generated using the battery or IC724.
.
IC702 is the step-up converter that generates
+
13.5 V for OLED from the power supply of
+
3.1 V.
.
IC720 is the regulator that generates the power supply of
+
2.8 V, used for driving of the RF circuit,
remote circuit (on the RM-215 board), or display LED, from the power supply of
+
3.1 V.
.
IC202 is the step-down regulator that generates
+
1.2 V, used in FPGA, from the power supply of
+
3.1 V.
7-1-3. RM-215 Board (Reference Nos. 2000 to 2999)
The RM-215 board mounts CPU (IC2000) and transceiver IC (IC2001) that perform remote control opera-
tion as the function of this unit.
The bandwidth of 2.4 GHz is used for the transmit frequency.
IC2000 is CPU and IC2001 is the transceiver.
The transmission output-adjusted value and remote-control ID are memorized by the internal EEPROM
of IC2000.