Connect Systems CS700, Service Manual

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DR6000-2/DR7000-2 Service Manual
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Figure 8 Base Band Processor
5.6 Voice Circuit
：
The station is equipped with Voice Prompt Function, which is very useful during night or under dark
condition.
The speaker will voice the current channel number when changing the channel every time because of
the voice memory chip (IC613), which stores channel voice prompts. It will repeat the current channel
number once pressing “Voice Prompts”.
The speaker will voice the current channel number under standby state if the Voice Prompt Function is
set. Press “Voice Prompts” for reset to switch voice types. Press “Voice Prompts” repeatedly for power
connection, then the voice types will be switched in circle in the order of “Chinese male voice—English
male voice—Chinese female voice—English female voice—no prompts”.
5.7 Power Supply
:
The station use lithium battery (7.4V, 1700mAh), while transmitter amplifier circuit (Q105 Q107) and
receiver audio amplifier (IC302) use battery directly for power supply, and other circuits use regulated
voltage (5V and 3.3V).
IC602
：
5C (controlled by MCU) (5V LDO)
IC603
：
5M 5R (controlled by MCU) (5V LDO)
IC604
：
5T (controlled by MCU) (5V LDO)
IC605
：
3.3V DC/DC
IC618
：
3.3V LDO, is the supply power of frequency synthesizer