Components Descriptiont; Display Unit; Tx-Rx Unit - Kenwood TM-V71A Service Manual

TM-V71A/V71E
Pin No. Port Name I/O
63~67 NC
68 LCD_DT_2
69 LCD_CLK_2
70 LCD_CE_2
71 NC
72 KEY13
73 KEY12
74 KEY11
75 KEY10
76 KEY9
77 KEY8
78 KEY7
DISPLAY UNIT (X54-3590-00)
Ref. No. Use / Function
IC901 Buffer
IC902 Buffer
IC903 MPU
IC904 5V AVR
IC905 Reset IC
IC906,907 LCD driver
Q901 Switching
Q902 Switching
Q903 Switching
Q904 Switching
Q905 Switching
D901~921 Switching
D922~951 LED
D952~983 LED
D984~986 LED
D987 LED
D988,989 Varistor
14
SEMICONDUCTOR DATA
Function
- Not used (GND)
O LCD driver 2 data
O LCD driver 2 CLK
O LCD driver 2 CE
- Not used (5V)
I [PM] key input
I [Band SEL B] key input
I [Band SEL A] key input
I [PF2] key input
I [PF1] key input
I [LOW] key input
I [REV] key input
COMPONENTS DESCRIPTION
Operation / Condition / Compatibility
RXD
TXD
5V
for MPU
SW5V for LCD driver IC
GR10V control
AM10V control
10V for Green LED
10V for Amber LED
Protection from surge input
Amber
Green
Amber
Green
Protection from surge input
Pin No. Port Name I/O
79~90 NC - Not used (GND)
91 VOL_B I AF VOL (Band B) A/D input
92 VOL_A I AF VOL (Band A) A/D input
93 SQL_B I SQL (Band B) A/D input
94 AVSS I GND
95 SQL_A I SQL (Band A) A/D input
96 VREF I Reference voltage input
97 AVCC I Analog power supply input
98 NC - Not used (5V)
99 KEY6 I [TONE] key input
100 KEY5 I [F] key input
TX-RX UNIT (X57-731X-XX)
Ref. No. Use / Function Operation / Condition / Compatibility
IC1 PLL IC A band
IC66 PLL IC B band
IC131 Power module VHF
IC161 Power module UHF
2CH analog
IC186 APC voltage VHF/UHF select
switch
IC187 OP amplifi er for APC
IC486 FM IC A band
IC487 OP amplifi er AGC amplifi er
IC546 FM IC B band
Q0: Wide/Narrow select for A band
Q1: VU_Select for A band
Q2: 8TVA control
Q3: 5RUA control
Q4: VHF AIP control
Q5: FAN control
IC576 Shift register
Q6: VCO shift for A band
Q7: UHF AIP control
Q8: 8TUA control
Q9: 5RVA control
Q10: VHF BPF control for A band
Q11: 5RAM control
Function