Kenwood Tk 780h1 Owners Manual

51
TK-780/ H
Test Equipment Required for Alignment
Test Equipment Major Specifications
1. Standard Signal Generator Frequency Range 136 to 174MHz
(SSG) Modulation Frequency modulation and external modulation
Output –127dBm/0.1µV to greater than –7dBm/100mV
2. Power Meter Input Impedance 50Ω
Operation Frequency 136 to 174MHz or more
Measurement Capability Vicinity of 100W
3. Deviation Meter Frequency Range 136 to 174MHz
4. Digital Volt Meter Measuring Range 1 to 20V DC
(DVM) Accuracy High input impedance...

52
TK-780/ H
ADJUSTMENT
Adjustment Location

Switch
MODULAR
MIC JACKMONITORSCAN POWER
BUSY/
TX LEDVOLUME
 UP
VOLUMEDOWNSYSTEM UP
(Trunking Format)
GROUP UP
(Conventional Format)   
SYSTEM DOWN
(Trunking Format)
GROUP DOWN   
(Conventional Format)    SUB 
DISPLAYMONITOR PRIORITY
SERVICEAUXILIAY
HANDSET
SCAN MAIL
PROGRAMMABLE
 FUNCTION KEYSALPHANUMERIC
 DISPLAY

Adjustment Point

Note
• Flash memory
The firmware program (User mode, Test mode, Tuning
mode, etc.) and the data programmed by the FPU (KPG-49D)...

53
ADJUSTMENT
Measurement
Test-
equipmentUnitTerminalAdjustment
Unit Parts MethodSpecifications/Remarks Condition
Item
TK-780/ H
Receiver Section
1.Discriminator1) Set test mode SSG Rear ANT TX-RX L6AF output maximum. Maximum point +0mV, –20mV.CH : CH1 - Sig1 - Narrow panel (A/2)
SSG output : –53dBm AF VTVM ACC
AF : 0.45V/4Ω
Oscilloscope(EXT.SP)
2. Sensitivity 1) Set test mode SSG ANT Adjust for
Select “SENS” in tuning mode.maximum SINAD.
“L SENS” AF VTVM ACC
SSG freq’ Distortion (EXT.SP)
K, HK :...

ADJUSTMENT
Measurement
Test-
equipmentUnitTerminalAdjustment
Unit Parts MethodSpecifications/Remarks Condition
Item
54
TK-780/ H
Transmitter Section
1. Frequency 1) Set test modePower meterRear ANT Check K,HK : 160.100MHz±100HzSelect “FREQ” in tuning mode.F. counter panel K2,HK2 : 149.100MHz±100Hz
PTT : ON
2. Power 1) Maximum power TX-RX VR1 27.0W : K,K2±0.5W : K,K2
output Set test mode (A/2) 50.0W : HK,HK2±2.0W : HK,HK2
Select “H POW” in tuning mode.“L HPOW 256” : K2,HK
“H HPOW 256” : K,HK2
PTT : ON
3....

55
ADJUSTMENT
Measurement
Test-
equipmentUnitTerminalAdjustment
Unit Parts MethodSpecifications/Remarks Condition
Item
TK-780/ H
6. Modulation 1) Set test modePower meterRear ANT Make the de- (Wide/Narrow)
balanced MIC input : OFF Deviation panel modulation
Select “BAL” in tuning mode. meter waveform neat.
“L BAL”
OscilloscopeDeviation meter filter
LPF : 15kHz AF VTVM Front MIC
HPF : OFF AG panel
De-emphasis : OFF
2) “C BAL”
PTT : ON
3) “H BAL”
PTT : ON
7. Maximum 1) Set test mode 3.8kHz (Wide)±50Hz...

ADJUSTMENT
Measurement
Test-
equipmentUnitTerminalAdjustment
Unit Parts MethodSpecifications/Remarks Condition
Item
56
TK-780/ H
11. Fine LTR 1) Set test modePower meterRear ANT 1.0kHz (Wide)±50Hz (Wide/Narrow)Select “FLTR” in tuning mode.Deviation panel 0.75kHz (Narrow)
“L FLTR” meter
deviation meter filter
OscilloscopeLPF : 3kHz
HPF : OFF AF VTVM Front MIC
PTT : ON AG panel
2) “C FLTR”
PTT : ON
3) “H FLTR”
PTT : ON
12. DTMF 1) Set test mode 3.0kHz (Wide)±0.2kHz (Wide)
deviation
Select “DTMF” in tuning...

JHFDBIGECA
1
3
5
7
2
4
6
CN 101
S T
H T
E
9C L
8C L
M D
CV
J72-0 617-1 2
C N 101
J72-0 617-1 2
C N 101
S T
H T
E
9C L
8C L
M D
CV
J72 -0 73 2-0 2
C N 101
C V
M D
8C L
9C L
E
H T
ST
CV
M D
8C L
9C L
E
H T
ST
J72 -0 73 2-0 2
C 107
C 121
C 103
C 102
C 126
C 117
C 120
C 119
R 110
C 108
R 102
C 125
C 115
L101
C 105
R 117
R 106
R 104
C 113
C 112
R 115
R 113
L102
R 114
R 111
C 130
D 101D 103
D 102
R 118
D 104
C 131
C 132
C 139
C 142
D 107D 106
D 107D 106
D 109
R 119R 120
R 121
T C 101
T C 102
L111
C 109
C 143...

ABCDEFGHIJKLMNOPQRS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
C 259
C 258
C 257C 265C 254
R 179
R 403
R 402
R 401
R 122
R 127
L214
R 55
R 209
R 215
R 309
R 320
R 310
R 312
R 323
R 311
R 315R 313R 314
R 111
L5
C F2 ( G )
D8D13
R 4
1
31
TX D1RX D1LO K
8
SQPTTM I/T X SM E/A MDIIG NAHK/B U SYD EO
R 3R2R1C9C7C6C5C3C2C1
C13C 8C4RSSI
D 9D12D 14
R 305R 129
R 114
R 121
R 300
IC 300
110
1120
R 303R 302R 301
R 218
R 219R 68
L2C 59
R 222
R 225
R 226R 246R 248
IC 20 2
13
46
D 208
C 204
L224
C 298
C 326C 324
C 316
C 317
C 321C...

SRQPONMLKJIHGFEDCBA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
J72 -0 80 9-0 2  A /2
L 14
R 109
R 106
R 148
C 188
C 197
C 143
C 126
C 120
C 78
C 121
C 119
C 196C 198C 89
C 151
C 80
C 76
C 73
C 136
C 123
C 134
R 150Q 27R 146
BE
CR 128R 152R 151
R 155Q 30
Q 25
Q 22Q 26
Q 31
Q 28
R 156R 143
R 153R 154
R 141
R 9R10R 11
C 175
R 12R 94
R 168D 6
133R SSI
D 2D3D4D1D5D17
R 59
R 134
C 31
C 18
C 61
IC 12OGI
C 408
IC 314
58
C46
C 21
C 20C 23
C 156
C 108
C 104
C 113
C 114
C 103
C 92
C 155
C 84
C 39
5431IC 20 1
R 96
C 157
C 95...

ABCDEFGHIJKLMNOPQRS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
L14
R 109
R 106
R 148
C 188
C 197
C 143
C 126
C 120
C 78
C 121
C 119
C 196C 198C 89
C 151
C 80
C 76
C 73
C 136
C 123
C 134
R 150Q 27R 146
BE
CR 128R 152R 151
R 155Q 30
Q 25
Q 22Q 26
Q 31
Q 28
R 156R 143
R 153R 154
R 141
R 9R10R 11
C 175
R 12R 94
R 168D 6
133
D 2D3D4D1D5D17
R 59
R 134
C 31
C 18
C 61
IC 12OGI
C 408
IC 314
58
C46
C 21
C 20C 23C 156
C 108
C 104
C 113
C 114
C 103
C 92
C 155
C 84
C 39
5431IC 20 1
R 96
C 157
C 95
R 166
R 124
C 118
C 28R 30
R...