HYT TC-610P, Service Manual

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TC-610P Service Manual
17
/LIGHTING
X601
MB95F108AK
WPFV-GE1
AT 24C 64
APC/TUNE
U605
U610
Reset
IC
U609
MON2
BAT
7.3728M cry stal oscillator
PTT2
PLL
1.VOX
2.BUSY_DET
3.BEEF/CALL
4.T/R
5.SAVE
6.DC/CTC
7.W/N
8.UART
9.BAT_BAT
10.PLL_LD
CHANNEL SW
Figure 8
The MCU control circuit is mainly composed of MCU, EEPROM, restart IC, keys, knobs, etc. Main
functions realized through this circuit are:
1
）
Signal Control:
To control Battery Save Mode;
To control high/low power switch;
To control wide/narrow band switch;
To control Tx/Rx switch;
To control APC/TUNE output voltage;
To control power supply of tranmitter and audio amplifier;
To control SQL open detection.
2
）
Signal Detect:
To detect startup of external PTT, MONI and VOX;
To detect PLL Unlock;