PRESIDENT Randy II P User manual

Service Manual
27MHz CB RADIO
MODEL：XH9006E.RANDY P & MⅡ
Ver.02 2013/03/08
MANUFACTURED BY CHIEF TEK ELECTRONIC CO., LTD.
2013.03.08

I N D E X
PAGE
BLOCK DIAGRAM…………………………………………………………... 3~4
DIRCUIT DESCRIPTION…………………………………………………….. 5~8
SPECIFICATION…………………………………………………………….... 9
ALIGNMENT INSTRUMENT LIST…………………………………………. 10
INSTRUMENT CONNECTION FIG 1……………………………………….. 11
ALIGNMENT PROCEDURES………………………………………….. 12~14
MAIN PC BOARD(TOP VIEW WITH COMPONENTS…..………………… 15
MAIN PC BOARD(BOT VIEW WITH COMPONENTS…..………………... 16
MAIN PCB BOARD(VIEW)………………………………………………….. 17~20
SOLDER MASK………………………………………………………………. 21~22
DRILL DRAWING……………………………………………………………. 23~24
ELECTRONIC MATERIAL LIST……………………………………………. 25-33
MECHANICAL Explode…………………………………………………. 34
MECHANICAL MATERIAL LIST…………………………………………… 35~37
LCD DISPLAY………………………………………………………………... 38
SEMICONDUCTOR LEAD IDENTIFICATION…………………………….. 39~40
IC LEAED IDENTIFICATION……………………………………………...... 41~42

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Project Title
Page Title
Document Number Rev
Date Sheet of
CTE
CHIEF TEK ELECTRONICS CO.,LTD.
CHIEF TEK
DrawAuditingAuthorize
ANTENNA
L.P.F B. P. F RF AMPANT. SW 10.695MHz
L1 L2 D1 D2 L11 L10 Q42(SC3356)
Q59(SC4099) L14 LR15 L16 XF1
(BA592)
B. P. F MIX
Q5
XTRL B.P.F
L.P.F FINAL PA
L1 L2
L3 L4
Q1
2SK3476
DRIVE - 2
Q2
2SK3078 Q3
DRIVE - 1
(2SC3356)
APC-O
TX EN
VOLUME
LCD DISPLAY
Audio AMP
U3 (TA7368PL）
BACK
LED2LED1
LIGHT
5V REG
IC2
XC6201-5V
POWER SW
VR-SW1
3.3 V
5T SW
Q22
Q24
RS232 PORT
LO BATT.
RP1 RP2
RESET
Q43
Q40 Q47RXD
TXD
SP OUT AF IN
AFOUT
TX LED
LED SW
BUSY LED
Q27Q26
DATA .CLOCK .EN
DATA .CLOCK .EN
KEY TONE
KEY TONE
KEY
SW1--SW6
PROG. CONNECTOR
J1
BATTERY
U4
STM8L152M8T6
(BB504C)
TX/RX
BUFFER
(2SC2714)
Q28
JACK1
MICROPHONE JACK
J3
SPEAK PHONEJACK
MK
MICROPHONE2
LS
SPEAKER
EXT MIC
V.C.O
Q30
BUFFER
(2SC2714)
Q44
OSC
2SC3356
PLL IN
T. V
XA1
10.240MHz
L.P.F
PLL
SR1503A
U6
Q29
BUFFER
(2SC2714)
455KHz
FA1
XTRL B.P.F
NJM2552V
U2
10.240MHz
RSSI
Q11 Q10
PZP103BYB PZP103BYB
AM EN FM EN
XC6201-3.3V
IC1
3V3 REG
FM_MOD
2SC2712(GR)
MIC AMP
U7
LMV324
MIC IN
Pre-emphasis
R230C19
L:TX VCO
VCO EN
Q18
H:RX VCO
AM MOD AMP
PVCC
Q13 Q14Q12
Q20 Q21
POWER SW
L.P.SW
FM H.P.SW
Q15 Q17 W1
AM/H.P.C
FM 5W L POWER
AM MOD
FM 5W
L POWER
L.P.F
APC
APC
5T
5T
SW-VCC
U1
NJM2904V
Q6 Q7
2SC4081
RSSI
SQ
NOISE IN
RSSI/NOISE AMP
RSSI SQ
RANDY &XH9006E BLOCK DIAGRAMⅡ
Page 3/42

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Project Title
Page Title
Document Number Rev
Date Sheet of
CTE
CHIEF TEK ELECTRONICS CO.,LTD.
CHIEF TEK
DrawAuditingAuthorize
R215
100K
C198
100NF
C202
100NF
R216
47K
+3.3V
C192
100NF
RESET
SWIM
TCVCXO
C199
10NF C193
100NF
TXDBAT-DET
PLL-SCLK
R213
10K
R212
47K
R214
0R
L23
LBD160808-102
VCO POWER EN
TP6
RESET
Ext SPK Detect
RXD
COM1
1
COM2
2
COM3
3
COM4
4
SEG0
5
SEG1
6
SEG2
7
SEG3
8
SEG4
9
SEG5
10
SEG6
11
SEG7
12
SEG8
13
SEG9
14
SEG10
15
SEG11
16
SEG12
17
SEG13
18
SEG14
19
SEG15
20
SEG16
21
SEG17
22
SEG18
23
SEG19
24
SEG20
25
DS1
LCDWT3727-G
COM0 COM1 COM2 COM3 SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20
+5V
LAMP
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
COM0
COM1
COM2
COM3
RESET
TONE
DW
A/F
H/L
MENU SW3
MENU
SW6
H/L
SW5
A/F
SW4
DW
C197
1NF C200
1NF
C201
1NF
C203
1NF
SW1
SQ
SW2
FUNC
FUNC
R197
47K R198 47K R199
47K R200
47K
C204
1NF C205
1NF
R201
47K R202
47K
+3.3V
SQ-KEY
SW-VCC
CP15
1NF
CP2
1NF CP14
100PF
LP1
ferrite JCB321611A
+5V
+
CP13
47UF/10V (B)
IN
3
GND
2
OUT 1
IC2
XC6201-5V-SOT-89
DP2
1N4148
CP11
100NF
CP8
1UF
+
CP12
10uF/10V(A)
+5V +3.3V
CP10
100NF
Power Circuit
IN
3
GND
2
OUT 1
IC1
XC6201-3.3V-SOT-89 1
2
3
4
J5
MIC-9.5*4.7
MICIN
RXD
PTT
SPK
1
2
J4
NU
C159
1NF E12
100UF/10V(B)
BATT
BAT-DET
54
VR-SW1A
VRT10KA
CP9
10NF
RP1
100K±1%
RP2
33K±1%
D18
SL-S270VGC
R164
220R C156
1NF
D17
SL-S270URC(RED)
R163
470R
+5V
TX LED
RX LED
C37
1NF
R99
2K2
C112
100NF
R160
3K3
R66
47K(NU)
R60
47K
R124
5K6
R54
270K
C114
100NF
C161
10UF/10V C126
1uF
R127
12K
R128
12K
R82
33K R146
10K
C127
1uF
R83
33K
R21
1K
C129
1uF
R85
27K
R84
33K
C128
1uF
R229
220K
R170
4.7K
R22
0R
C164
1NF
R75
39K
D27
1SS357
R100
2K2
C163
10NF
R169
1K
R171
120R
R168
4.7K
C162
10NF
E13
220uF/6.3V(C)
R172
220K
R173
220K
R23
1K(NU) C167
220PF
C165
1uF(NU)
C168
33PF(NU)
C169
390PF
C170
100PF
R174
220K
R176
220K R177
220K
C173 750PF(NU)
C172 820PF
C174
82P
C171
100NF
R175
820R
C19
47NF
R230
1K5
R67
27K
R6
2.2K
W5
5K(B)
W3
1K(B)
C113
100NF
12 L27
LBD160808-102
MICIN
Q50
BC857-40W
1
3
2
11 4
U7A
LM324
7
6
5U7B
LM324
8
10
9U7C
LM324
14
12
13 U7D
LM324
R228
220R
FM MOD
FM MOD EN AM MOD AM ANL KEY TONE MIC MUTE
SPK
R166
6K8
R165
6K8
C158
47NF
KEY TONE
C13
470PF
L8
680nH(SWI10)
C20
18P
D1
BA592
D2
BA592
C11
47P
C15
47NF C21
1NF
D4
1N4148
D5
1N4148
R7
1K E2
2.2uF/10V(A)
5T
D6 1N4148
C58
10NF
R8
100R
R3
220R
C47
120PF
L11
330nH(SWI8)
L10
560nH(SWI8)
C40
NC C53
5P
C54
22P
C89
22P(NU) C41
NC
L13
1uH(SWI8)(NU)
C59
0R
R35
22R
C91
100NF C61 10NF R68
3.3K
L14
820nH(SWI8)
C118
3.3p
C115
33PF C121
4P(NU)
C116
33PF
C119
2P7(NU)C120
3.3p
C122
4P(NU)
C117
47PF
L15
820nH(SWI8)
L16
820nH(SWI8)
C63
10NF
R76
56K
R43
100K
R36
22R
Q5
BB504C
R45
100K
R77
56K
C93
100NF C64
10NF C130
20P
R95
2K2 L17
10UH(SWI10)
C66
10NF
R10
1K
R5
220R
C123
1uF C65
10NF
5R
C42
NC C43
NC
C67
10NF
C60
10NF
D7
1.5K
R9
680R R69
2.2k
5R
R71
82K
R73
39K C62
10NF
R44
100K
R79
33K
R32
100R
5R
XF1
10.695MHZ
R46
100K
R47
68K
R48
100K
C94
100NF C95 100NF
OSC IN
1
OSC OUT
2
MIX OUT
3
GND
4
AM DEC
6
AM IF IN
5
FM IF IN
7
FM DEC
8
FM IF OUT
9
QUAD IN
10 FM AF OUT 11
AMP IN 12
AMP OUT 13
AM AF OUT 14
AM SW 15
RSSI OUT 16
RF AGC OUT 17
AM AGC IN 18
V+ 19
MIX IN 20
U2
NJM2552V
C22
1NF C96
100NF
E5
10uF/10V(A)
R103
22K
C68
10NF
C101
100NF
C138
100NF
C102
100NF
C136
1NF
C137
1NF C23
1NF
C24
47NF
R125
472P
R121
560K
C133
10UF/10V
C131
10P
C132
15P
C98 100NF C99 100NF
C100 100NF
C135
120PF
C97 100NF
Y1
CDS455E24
R129
47K
+3.3V
R49 390K
C16
100NF
C124
1uF
R80
33K R81
33K
5R
R144
15K
C139
2.2uF
R11
1K
R26
4K7
R117
330R
5R
C103
100NF
R120
330K
R115
1K8
R122
5K6
R181
56R
C104
100NF
SQ
AM EN
RXMUTE VOL VRH PA/RSSI
5R
RX MIX 10.24MHZ
C87
10NF C111
100NF
C33
1NF C134
10UF/10V
R182
270R(NU)
R41
22R
C32
1NF
Y2
10.24MHZ
C210
39P
C141
68P
C211
6P
C6
2.2NF
R64
10K
D25
HVC376B
D21
HVC376B R142
47K
R143
47K
R65
10K
C88
10NF
10.24MHZ
TCVCXO
R20
1K
R19
1K
R18
1K
D15
1N4148
R17
1K
C50
100P
C51
100P
C110
100NF
R221
120K
R16
1K
+3.3V
R222
2K
R220
0R
R218
3K9
R158
3K3
R219
2.7K
E10
3.3uF/10V(A) E11
0.1uF/10V(A)
E9
0.1uF/10V(A)
C36
1NF
D23
1SV283
D22
1SV283
D20
1SV270
C57
2.7P
L24
390nH(SWI10)
L25
270nH(SWI10)
C208
10PF
C207
18P
C85
10NF
R50
100K
C35
1NF
R217
0.1UF
R157
3K3
C34
1NF
R141
47K
R51
100K
C109
100NF
C86
10NF
C108
100NF
R98
2K2
R52
100K
R53
100K
VCO-5V
C147
150PF
C206
10P
C84
10NF
C146
150PF
C83
10NF
R183
270R
R104
22K
R40
22R
C209
4.7uF
C30
1NF
C31
1NF
R156
3K3
D12
1N4148
C56
5P
R149
470R
R135
47K
R14
1K C14
470PF
VCO-5V
VCO-5V
R180
390R
R39
22R
C81
10NF
R140
47K
+5V
R118
330R
R38
22R
R78
56K
R145
15K
R178
820R
R179
390R
C82
10NF
C3
27P
C55
5P
C175
220PF
C177
39P
C176
47P
L20
820nH(SWI8)
L21
220nH(SWI8)
L22
220nH(SWI8)
C29
1NF
5R
RX MIX
VCO-RF
VCO EN FM MOD PLL-LD PLL-SCLK PLL-DATA PLL-LE
VCO-5V
C140
75P R123
5K6(0603)
C12
47PC142
220PF
L1
LSS033011
C1
27P C143
180PF
L2
LSS033011
C45
10P
C4
27P
C148
150PF
L3
LSS033011
C144
100PF
C2
27P C151
180PF
L4
LSS033011
C149
100PF
L6
LSS04307
C152
270PF
C153
68P
C145
150PF
C5
2.2NF
C72
10NF
C105
100NF
L5
LSS04208
Q1
2SK3476 R1
39R
R58
10K
R108
27K C75
10NF
C7
22P
C76
10NF
L7
150nH(SWI8)
C9
82P
C10
100PF
C77
10NF
L19
560nH(SWI10)
R2
39R
R126
12K
R29
5K6 C78
10NF
C39
NC
C79
10NF
L9
68nH(SWI8)
C48
100p
C52
150PF
C18
47NF
L12
1uH(SWI8)
R152
10R
R24
6K8 R25
4K7
R61
10K
C80
10NF
C28
1NF
C90
220PF
C8
22P
R31
100R
5T
C106
100NF
E7
22UF/10V(A)
VCO-RF
BATT
C74
10NF
C26
NU
Q14
KTA1042D
Q13
FMMT717
Q15
FMMT717
C71 10NF C27
1NF
R150
47K
C25
1NF
C17
47NF
R147
470R R33
100R
D9
1N4148
C150
4.7NF
E6
33uF/10V(B) W1
100K(B) D11
1N4148
E8
10uF/10V(A)
R137
47K
5T
D10
1N4148
C70
10NF
R72
82K
R131
47K
C73
100NF
R13
390R
R56
82K
R62
2.2K
R138
47K
SW-VCC R27
4K7
R148
510R
R28
4K7
R34
100R
R151
470K
R30
4K7
C107
100NF R59
10K
C125
1uF
+5V
AM MOD
L POWER
AM MOD EN
FM 5W L POWER
L18
ferrite JCB321611A
PTT PA/RSSI
VCO EN
FM MOD EN
L POWER
RX LED
AM MOD EN
TX EN
PLL-LD
MENU H/L DW A/F
RX EN
R130
47K
+3.3V
TP1
R209
2K2
R207
4K7
C217
150PF
R205
2K2
Q47
2SC4081
+3.3V
+3.3V
R92
10K
E C
B
Q40
DTC114TU
D19
1SS357
TX/RX
TP2
R89
1K
CP6
100PF
SP1
R162
47R
CA2
22UF/10V(A)
Russia High Power
CP3
1NF
CP4
1NF
CP7
100PF
MIC
TX/RX
11
2
23 34 4
SW7
PTT
CA3
100PF
CA10
10NF
CA1
1NF
MIC-IN
MIC-1
RA1
33K
RA3
10K
RA4
2K2
CA5
10NF QT2
2SC4081
CA7
10NF
CA8
10uF/10V(A)
RA6
47K
+3.3V
CA9
1NF
RA5
4K7
MIC Mic Circuit
Audio Amp Circuit
Mic Mod Circuit
L26
1UH(SWI8)
3V3
IN 1
out
2
G
3
G
4
FA1
LTWC455H
IF VCC
R119
10K
R105 1K(NU) R106
4K7
R114
1K5
R113
1K8
R110
390K
R111
12K R116
4K7
R102 22K
R112
8.2K
SP EN
SW-VCC SP
CF1
100uF/10V(B)
C190
47nF
1
1
2
2
3
3
4
4
5
566
77
88
99
10 10
U3
TA7368PL
R194
150R
+
C187
4.7uF/16V(A)
C188
100pF(NU)
C186
470nF
R189
47K
R193
2K2
C180
1NF
C183
100nF
C212
470PF
C213
470PF
R224
10K
R185
10K
+3.3V
R186
10K
C178
1uF
R195
10R
Q38
2SC4081
Q37
2SC4081
1
2 3
Q39
FMMT717
C185
0.1UF/10V(A)
+C215
10uF/10V(A)(NU)
C179
1uF
R226
82K
C216
100NF C160
1NF
C189
2.2nF
VOL VRH
KEY TONE
SP
77
6
5
8
844
U1B
NJM2904V
12
3
U1A
NJM2904V
R94 220K
R87
1K
R91
10K
R101
51K
R90
33K
R86
NC
TP8
MODE
E C
BQ25
DTC114TU
R161
47R
R136
47K
+3.3V
R132
47K
+3.3V
R139
47K
+3.3V
+3.3V
VCO&PLL Circuit
Power Control Circuit
Tx Circuit
Rx&Mix&IF Circuit
IF VCC
RANDY II
2013/02/25
B+
TP10
1
2
J2
CON2
R231
100K
E C
BQ48
DTC114TU
R236
47K
+3.3V
23 1
D3
1SS302
Q2
2SK3078
33
22
1
1
VR-SW1B
VRT10KA
Q10
2SK1824
Q11
2SK1824
R70
560R
0.7
R241
2.2K
R240
100K
PVCCBAT
C3
D4
A1
B2
J3
PJK-477
LED1
LED BACKLIGHT
Q43
2SC4081
1000 1001 1002 1004
1005 1006
1007
1008 1009
1010
1011 1012
1013
1014
1015 1017 1018 1019 1022 1023 1024
1025 1026 Q3
2SC3356
B1
C3
E
2
Q30
2SC2714(QY)
Q9
2SC4081
Q44
2SC3356
Q45
2SD1048(X7)
Q29
2SC2714(QY)
Q28
2SC2714(QY)
PLL-VCC PLL-VPP
C184
4.7uF
C181
1NF
R188
3K3
D16
1N4148
+5V
B
1
C3 E
2
Q32
2SC4081
PLL-VCC
R63
10K
C219
4.7uF
C182
1NF
R225
15K
Q33
2SC4081
R187
22K
2V4
Q6
2SC4081
FM EN
C220
470pF
C221
100NF
R243
10K
R244
10K
AM EN
+3.3V
E C
B
Q51
DTC114TU
SQ
E C
BQ21
DTC114TU
E C
B
Q17
DTC114TU
E C
B
Q16
DTC114TU
Q18
2SC2712(GR)
E C
B
Q19
DTC114TU
E C
B
Q26
DTC114TU
E C
B
Q27
DTC114TU
Q49
2SC4081
+3.3V
Q36
2SC4081
Q8
2SC4081
+3.3V
PVCC
PH0/SEG36 1
PH1/SEG37 2
PH2/SEG38 3
PH3/SEG39 4
PA0 5
NRST/PA1 6
PA2/OSC_IN 7
PA3/OSC_OUT 8
PA4/COM0 9
PA5/COM1 10
PA6/COM2 11
PA7/SEG0 12
VSSA/VREF 13
VSS1 14
VDD1 15
VDDA 16
VREF+ 17
PG0/SEG28 18
SEG35/PG7
64 SEG34/PG6
63 SEG33/PG5
62 SEG32/PG4
61 SEG21/ADC7/PD7
60 SEG20/ADC8/PD6
59 SEG19/ADC9/PD5
58 SEG18/ADC10/PD4
57 COM7/PF7
56 COM6/PF6
55 COM5/PF5
54 COM4/PF4
53 ADC27/PF3
52 ADC26/PF2
51 ADC25/DAC2/PF1
50 ADC24/DAC1/PF0
49 VSS4
48 VDD4
47 PG1/SEG29 19
PG2/SEG30 20
PG3/SEG31 21
VLCD 22
PE0/SEG1 23
PE1/SEG2 24 SEG12/ADC16/PB2
41
SEG13/ADC15/PB3
42
SEG14/ADC14/PB4
43
SEG15/ADC13/PB5
44
SEG16/ADC12/PB6
45
SEG17/ADC11/PB7
46
PD2/ADC20/SEG8 31
PD1/ADC21/COM3 30
PD0/ADC22/SEG7 29
PE5/ADC23/SEG6 28
PE4/SEG5 27 PE3/SEG4 26 PE2/SEG3 25
PD3/ADC19/SEG9 32
PH4/USART2 RX 33
PH5/USART2 TX 34
PH6 35 PH7 36
VDD3 37
VSS3 38
PB0/ADC18/SEG10 39 PB1/ADC17/SEG11 40
SDA/PC0
65
SCL/PC1
66
VDD2
67
VSS2
68
SEG22/ADC6/PC2
69
SEG23/ADC5/PC3
70
SEG24/ADC4/PC4
71
PC5
72
PC6
73
SEG25/ADC3/PC7
74
SEG26/PE6
75
SEG27/PE7
76
PI0
77
PI1
78
PI2
79
PI3
80
U4
STM8L152M8T6
PLL-DATA
LAMP SQ-KEY
TONE
TCVCXO
SP EN
MIC MUTE
TX LED
FM 5W
FM EN
RXMUTE
FUNC
PLL-LE
AM EN
MODE
+3.3V
+3.3V
+3.3V
R191
47K
R192
47K
R206
47K
R208
47K
+3.3V
R190
47K
R211
1K
3V3
3V3
3V3
3V3
+3.3V
SGND
SGND
SGND
SGND
C157
1uF
GND
+3.3V
R210
1K
C214
1NF
+3.3V
1
2
3
4
5
6
7
8
J1
CON200D8P
R184
47R
SWIM
+3.3V
TXD
BAT
E C
BQ55
DTC114TU
Fin
8
Do
5
Data
10
Clock
9
LE
11
LD
14
VCC 4
Vp 3
OSCI 1
OSCO 2
GND
6PS 12
Zc 13
P∮15
R∮16
XFin
7
U6
SR1503A
C191
1NF
VCO POWER EN
C218
1NF
VCO-5V +5V
R238
47K
R237
2K2
Q56
FMMT717
R242
47K
E C
BQ57
DTC114TU
+3.3V
R246
47K
R245
47K
VCO-5V
Q12
2SC2712(GR)
Russia High Power
Q7
2SC4081
C223 100NF
C222
47NF
ANL
5R
R252
22K
Q31
2SC4081
R247
10K
AM AF OUT
R37
22R
R107
47K
R249
47K
C224
1UF
R250
47K
R251
33K
Q58
2SC4081
AM AF OUT
R248
47K
ANL
BT ON
+3.3V
+3.3V
TX/RX
2
233
1
1
QR5
HRB0103B
APC
APC
APC-OAPC-O
D24
5V1
A/D TEMP
1
1
2 3
JTA1
CON20279-001E
D28
1N4148
R239
4K7
C166
10NF
C154
1NF
5T +5V
R159
47K(NU)
R153
2K2
C155
1NF
5R +5V
R133
47K
R154
2K2
Q22
FMMT717 Q23 FMMT717
TX EN
RX EN
R134
47K
R155
47K
E C
BQ53
DTC114TU
E C
BQ24
DTC114TU
+3.3V+3.3V
OSCO
OSCI
RFIN
TUNING
DATA CLK LE
LD
G
1
S
2D3
Q54
P5103EMG
C194
10NF
R254
47K
R253
22K
Q42
2SC3356
Q59
2SC4099
1020 1021
R255
2K
in
1out 2
gnd
3
FA2
NU
C195
NU
C92
0R
C196 0R
in 1
gnd
3gnd 4gnd 5
out
2
FA3
nu
55
66
5566
R42
10R
+5V
R4
2.2K
C44 1NF
R55
820R
+3.3V
A/D TEMP
Rte1
47K(RTH)
R57
120K(+/-1%)
1
2 3
E1
ANT
MIC
MICIN
EX_PTT
EX_PTT
R227 10R
CA4
10NF
RA2
10K
Q46
BC857W
CA6
470PF R167
47K
4
5
2
3
JACK1
PJ-208B
D8
1SS357
C38
12PF
Page 4/42

RANDY II/ XH9600E Circuit Description
Randy II / XH9600E & Rescue 27 are same Low Band VHF radio which is operating from
26.965 ~ 27.405 MHz frequency range. According to the schematic diagram that separate
by several section, the circuit description are as below:
A．System Description
The radio has built in AM & FM modulation with receiving & transmitting simplex operating
function. The operating frequency had been fixed by MCU. The receiving circuits are designed by
double-mixer system both FM & AM, the 1st intermediate frequency is 10.695MHz & the 2nd
intermediate frequency is 455KHz, the 2nd local frequency is 10.24MHz, the audio signal will
connect from U2 through AF amplifier (U3) to the loudspeaker.
The 1st local frequency is generated by VCO (voltage controlled oscillation) that was controlled by
MCU (U4) through PLL chip (U6). The PLL OSC frequency is 10.24MHz which is generate by
XA1 crystal, the MCU clock is built-in type.
The transmission frequency is come from VCO with AM or FM modulation, then through RF PA
amplifier (Q1) & low pass filter (L1~L4) to antenna.
B．Receiver Section
(1) Antenna Low Pass Filter
The low pass filter are used to attenuate the unwanted signal in RX & TX mode, they combine
with L1, L2, L3, L4, L6 & other relative components.
(2) Antenna Switch
The RX/ TX antenna switch are including D1, D2, C15, C21, D4 & R3.
(3) Front End LNA Circuit
They are including band pass filter & LNA amplifier, L8, L10, L11, Q59, L14, L15, L16 are band
pass filter which are allow the desired signal go in only, Q42 is LNA amplifier.
(4) 1ST Mixer & IF Filter
The input signal will be mixed with local OSC signal & generate the 1ST IF 10.695Mhz, they are
including Q5, L17, R95, C130, C66, R10, it will go out through the IF filter XF1.
(5) IF Amplifier & Audio Detect Signal
The 1ST IF signal will go to U2 (including 2nd IF mixer, amplifier, AM/FM detect, --- etc.) pin 20, it
will go through 455KHz ceramic filter FA1 & discriminator Y2, to detect a AF signal out in U2
pin11 (FM) or Pin14(AM).
(6) Squelch & AGC Circuit
The noise signal go to the noise amplifier input (U2 pin12) & output from U2 pin13, then go to the
U1 to get the noise level & RSSI level, they are used to set the squelch level by MCU & AGC
circuit (Q6, Q7).
(7) AM/FM switching & Speaker Amplifier
The AM/FM audio signal will be switch by Q10, Q11, then go in the TIC1 pin23 for CTCSS tone
decoder & audio process, then go to the speaker amplifier (U3) through buffer amplifier (Q8) &
volume controller.
Page 5/42

C．PLL Frequency Synthesized
The PLL circuit is used to control the VCO to generate the local OSC frequency for receiving &
transmission frequency.
(1) PLL Circuit
The XA1 is 10.24MHz crystal which is used to generate a standard frequency for PLL chip (U6),
it will divide to 5KHz reference frequency to control VCO frequency. The U6 pin5 is charge
pump output, it connect to VCO D22, D23 through low pass filter R222, E11, R219,218, E10, E9,
R158. The U6 pin8 is RF input from VCO OUT (Q29).
(2) VCO (Voltage Controlled Oscillator) Circuit
The VCO circuit are including Q44, L24, L25, D22, D23, D20 & relative components, the Q45 is
VCO switch to control RX/TX OSC frequency, Q9 is ripple filter of power supply, Q28 is RX
buffer amplifier, Q3 is TX buffer amplifier, D20 is FM modulation diode.
(3) PLL Un-lock Detect
The D15, R17, R16, R221, C110 are circuit of PLL Lock detect to MCU PLL-LD pin.
D．Transmission Section
(1) AM Modulation
Microphone signal connect to U7 pin3, after amplifier, band pass filter & AGC circuit, it go out
through W3, Q18, Q12, Q13 Q14 to PVCC of RF power supply.
(2) FM Modulation
It is similar circuit except that go from U7 Pin 14 through C19, R230, R67, W5 to VCO D20.
(3) TX Driver & Power Amplifier
The Q3, Q2 & Q1 are TX driver amplifier after VCO switching circuit, Q1 is TX power transistor.
The TX power level have Hi & Low two Power level, The MCU APC pin is used to fine tune the
Hi power to 4W & Low power to 1W in FM mode. AM Hi power is able to tune by W1 & go
through D11, D10, D9, Q12, Q13, Q14 to PVCC.
E．DC Power Manager Circuit
The system power supply are able to offer stable +5VDC by IC2, then IC1 is used for MCU
+3.3VDC power supply.
F．Controlled System
The controlled system are done by MCU that are including low battery check, Squelch level
setting, PLL data, AM/FM power controlled, modulation, operating channel setting & EEPROM
data, --- etc.
Page 6/42

RANDY II/ XH9600E Circuit Description
Randy II / XH9600E are same Low Band VHF radio which is operating from 26.965 ~ 27.405 MHz
frequency range. According to the schematic diagram that separate by several section, the
circuit description are as below:
A．System Description
The radio has built in AM & FM modulation with receiving & transmitting simplex operating function. The
operating frequency had been fixed by MCU. The receiving circuits are designed by double-mixer system
both FM & AM, the 1st intermediate frequency is 10.695MHz & the 2nd intermediate frequency is 455KHz, the
2nd local frequency is 10.24MHz, the audio signal will connect from U2 through AF amplifier (U3) to the
loudspeaker.
The 1st local frequency is generated by VCO (voltage controlled oscillation) that was controlled by MCU (U4)
through PLL chip (U6). The PLL OSC frequency is 10.24MHz which is generate by XA1 crystal, the MCU
clock is built-in type.
The transmission frequency is come from VCO with AM or FM modulation, then through RF PA amplifier (Q1)
& low pass filter (L1~L4) to antenna.
B．Receiver Section
(1) Antenna Low Pass Filter
The low pass filter are used to attenuate the unwanted signal in RX & TX mode, they combine with L1, L2,
L3, L4, L6 & other relative components.
(2) Antenna Switch
The RX/ TX antenna switch are including D1, D2, C15, C21, D4 & R3.
(3) Front End LNA Circuit
They are including band pass filter & LNA amplifier, L8, L10, L11, Q59, L14, L15, L16 are band pass filter
which are allow the desired signal go in only, Q42 is LNA amplifier.
(4) 1ST Mixer & IF Filter
The input signal will be mixed with local OSC signal & generate the 1ST IF 10.695Mhz, they are including
Q5, L17, R95, C130, C66, R10, it will go out through the IF filter XF1.
(5) IF Amplifier & Audio Detect Signal
The 1ST IF signal will go to U2 (including 2nd IF mixer, amplifier, AM/FM detect, --- etc.) pin 20, it will go
through 455KHz ceramic filter FA1 & discriminator Y2, to detect a AF signal out in U2 pin11 (FM) or
Pin14(AM).
(6) Squelch & AGC Circuit
The noise signal go to the noise amplifier input (U2 pin12) & output from U2 pin13, then go to the U1 to get
the noise level & RSSI level, they are used to set the squelch level by MCU & AGC circuit (Q6, Q7).
(7) AM/FM switching & Speaker Amplifier
The AM/FM audio signal will be switch by Q10, Q11, then go in the TIC1 pin23 for CTCSS tone decoder &
audio process, then go to the speaker amplifier (U3) through buffer amplifier (Q8) & volume controller.
C．PLL Frequency Synthesized
The PLL circuit is used to control the VCO to generate the local OSC frequency for receiving &
transmission frequency.
(1) PLL Circuit
Page 7/42

The XA1 is 10.24MHz crystal which is used to generate a standard frequency for PLL chip (U6), it will divide
to 5KHz reference frequency to control VCO frequency. The U6 pin5 is charge pump output, it connect to
VCO D22, D23 through low pass filter R222, E11, R219,218, E10, E9, R158. The U6 pin8 is RF input from
VCO OUT (Q29).
(2) VCO (Voltage Controlled Oscillator) Circuit
The VCO circuit are including Q44, L24, L25, D22, D23, D20 & relative components, the Q45 is VCO
switch to control RX/TX OSC frequency, Q9 is ripple filter of power supply, Q28 is RX buffer amplifier, Q3 is
TX buffer amplifier, D20 is FM modulation diode.
(3) PLL Un-lock Detect
The D15, R17, R16, R221, C110 are circuit of PLL Lock detect to MCU PLL-LD pin.
D．Transmission Section
(1) AM Modulation
Microphone signal connect to U7 pin3, after amplifier, band pass filter & AGC circuit, it go out through W3,
Q18, Q12, Q13 Q14 to PVCC of RF power supply.
(2) FM Modulation
It is similar circuit except that go from U7 Pin 14 through C19, R230, R67, W5 to VCO D20.
(3) TX Driver & Power Amplifier
The Q3, Q2 & Q1 are TX driver amplifier after VCO switching circuit, Q1 is TX power transistor. The TX
power level have Hi & Low two Power level, The MCU APC pin is used to fine tune the Hi power to 4W &
Low power to 1W in FM mode. AM Hi power is able to tune by W1 & go through D11, D10, D9, Q12, Q13,
Q14 to PVCC.
E．DC Power Manager Circuit
The system power supply are able to offer stable +5VDC by IC2, then IC1 is used for MCU +3.3VDC power
supply.
F．Controlled System
The controlled system are done by MCU that are including low battery check, Squelch level setting, PLL
data, AM/FM power controlled, modulation, operating channel setting & EEPROM data, --- etc.
Page 8/42

SPECIFICATION
GENERAL
Frequency Range 26.965 ~ 28MHz.
Frequency Control Phase Lock Loop (PLL) synthesizer.
Channel spacing 10KHz
Modulation mode AM/ FM
Frequency Stability ± 0.005 %
Channel step 10KHz
Maximum channel > 40 channel
Operating Temperature Range -10°C to +50°C
Input Voltage 8.4VDC
Working Voltage 6.29~8.4V
Antenna Connector TNC with 50 ohms
Dimensions 120(H)X54(W)X35(D)mm
Weight About 250g(Including battery)
TRANSMITTER
AM /FM Power Output FM: 1/4W
AM: Carry power 1/3W without modulation
Spurious Emissions <-57 dBm.
Carrier Suppression <-54 dBm.
Audio Frequency Response 300Hz to 2.5KHz
Max. Modulation FM
AM
+/- 2KHz
100%
RECEIVER
AM Sensitivity For 20dB S/N w.CCITT < -110dBm
FM Sensitivity For 20dB S/N w.CCITT < -116dBm
Image Rejection Ratio >65 dB.
Adjacent Channel Selectivity 55 dB.
Automatic Gain Control (AGC) Figure
Of Merit
100 mV for 10 dB Change in Audio Output.
Squelch Adjustable; 6 Levels
Audio Output Power > 0.5W
Signal to noise ratio > 40db
Internal Speaker 8 Ohms; 1 Watts.
Page 9/42

ALIGNMENT INSTRUMENT LIST
Instrument Specification
Signal Generator Frequency Range: 0.1~1Ghz
Output Level: 0.1uV~50mV(-127 to -13 dBm)
AC Voltmeter Measuring Range: 1mV~10V
Distortion Meter Measuring Range: 0.1~20%
Frequency Counter Frequency Range: 0.1~1GHz
Accuracy: ±1ppm or Better
Sensitivity: 100mV or Better
Oscilloscope Frequency Range: DC~20MHz
Measuring Range: 0.01~10V
RF Power Meter Connector Type: BNC
Measuring Range: 0.1~10W
Frequency Range: 0.1~1GMHz
Impedance: 50ohm
VSWR: Less than 1.2:1
DC Power Supply Output Voltage: 0~13.8 VDC
Output Current: 3A or more
DC Voltage Meter Output Impedance: 50K ohm / DC
External Load Speaker: 3.5Φ, Mono with 4 ohm / 0.5 W load
Microphone: 2.5Φ, Mono with 2k ohm impedance
Attenuator Attention: 30 or 40 dB
Rating Power: 5W or more
FM Modulation Meter Frequency Range :20Hz~ 3 KHz
Measuring Range : 0 ~ ±10KHz
Audio Signal
Generator
Frequency Range: 20Hz~ 3 KHz
Output Level: 1 mV~ 1V
Page 10/42

Page 11/42

ALIGNMENT PROCEDURES
This software do not need to install. Double-click the icon.
DaAd Debug（A/D Debug）
1. Battery voltage setting：No need to use this function, we’ve already set, so pls do not alignment this
parameter.
2. RSSI setting：There are 7 RSSI levels should be alignment. Every level has its own RF LEV (see as
bellow).
RSSI Level 0 1 4 7 10 13 15
AM/FM
RF LEV -123 -120 -109 -97 -85 -73 -48
Procedure: Set the “RF LEV” on equipment to -123dBm，and the select the RSSI level “0”. If the channel
is at FM, choose ”FM” in the software, then press Get A/D” of SQ Rssi,, then press “Set File” to store the
setting. After that, continue to set the RSSI Level “1” and the rest level. When all of the 7 RSSI levels set,
switch the radio to AM, then using the same way to set RSSI Level at AM. (See as bellow)
Get the current battery voltage need
Get the current SQ RSSI
Get the current SQ Noise
To get the value that have been
written in the radio.
To store the new set value.
RSSI & Noise level
Page 12/42

3. NOISE LEV setting: There are 4 Noise level, and each have its own RF LEV. (see as bellow)
NOISE Level 0 1 2 3
AM/FM
RF LEV -126 -123 -120 -117
Procedure：Set the “RF LEV” to “-126dBm”, and choose NOISE Level “0”. If the channel is at FM, choose
”FM” in the software, then press Get A/D” of SQ Noise, then press “Set File” to store the setting. After that,
continue to set the Noise Level “1” and the rest levels. When all of the 4 Noise levels set, switch the radio
to AM, then using the same way to set Noise Level at AM. (See as bellow)
Adjust：
SQ grade offset: Do not change the frequency division and set the SQ grade offset as bellow:
Frequency division.
Press “Get” to get the frequency division of the radio.
Note: Do not do any change to this division.
SQ grade offset
The offset value could be different for AM & FM.
Page 13/42

SQ Level setting:
1. SQ Level setting: SQ1 set to “0-0-1-1”, which means SQ1: -120 on, -123 off. SQ2 set to: 2-3-4-4,and
SQ3…….
2. SQ ICON( Signal strength): 4-7-10-13 means : showing one bar at -109dBm, two bar at -97dBm, three
bar at -85dBm, for bar at -73dBm.
3. Noise level setting: There are two levels, pls set Noise 1: 0-0-2-3, which means:-123dBm off, -120dBm on,
-126dBm Limit off, -117dBm Limit on.
Page 14/42

Page 15/42

Page 16/42

MAIN PC BOARD(VIEW)
Page 17/42

MAIN PC BOARD(VIEW)
Page 18/42

MAIN PC BOARD(VIEW)
Page 19/42

MAIN PC BOARD(VIEW)
Page 20/42