Kenwood Tk760hg1 Manual

21
TK-760HG/ 762HG
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...

22
TK-760HG/ 762HG
ADJUSTMENT
Adjustment Location

Switch (TK-760HG)
Adjustment Point

Note
• Flash memory
The firmware program (User mode, Test mode, Tuning
mode, etc.) and the data programmed by the FPU (KPG-56D)
for the flash memory, is stored in memory.  When parts are
changed, program the data again.
• EEPROM
The tuning data (Deviation, Squelch, etc.) for the
EEPROM, is stored in memory.  When parts are changed,
readjust the transceiver.

Repair Jig
• Chassis
Use jig (Part No. : A10-4010-02) for...

23
ADJUSTMENT
Measurement
Test-
equipmentUnitTerminalAdjustment
Unit Parts MethodSpecifications/Remarks Condition
Item
TK-760HG/ 762HG
Receiver Section
1.Discriminator1) Set test mode SSG Rear ANT TX-RX L5AF output maximum.• Wide CH : CH1 - Sig1 panel (A/2)
SSG freq’ AF VTVM ACC
: 161.050MHzK
Oscilloscope(EXT.SP)
: 149.050MHzK2
: 160.050MHzM
SSG output : –53dBm/501µV
SSG MOD : 3kHz
AF : 1.4V/4Ω
2. Sensitivity 1) Set test mode SSG Rear ANT TX-RX L11 RSSI voltage
• Wide
Select “SENS” in tuning mode.panel...

ADJUSTMENT
Measurement
Test-
equipmentUnitTerminalAdjustment
Unit Parts MethodSpecifications/Remarks Condition
Item
24
TK-760HG/ 762HG
3) “S.Q.L.3._.” SSG Rear ANT FrontCH/Adjust to the
Adjust [
***] panel panel squelch threshold
SSG freq’ AF VTVM ACC point.
: 173.950MHzK,MDistortion (EXT.SP)
: 161.950MHzK2meter
• Narrow 4) “SQL3
***.”
Oscilloscope
Adjust [
***]AG
SSG freq’
: 161.050MHzK
: 149.050MHzK2
: 160.050MHzM
4. Squelch 9 1) Set test mode
• Wide
Select “SQL9” in tuning mode.“S.QL9”
Adjust [
***]...

25
ADJUSTMENT
Measurement
Test-
equipmentUnitTerminalAdjustment
Unit Parts MethodSpecifications/Remarks Condition
Item
TK-760HG/ 762HG
1. Frequency 1) Set test modePower meterRear ANT FrontCH/Check 161.100MHz±50HzKSelect “FREQ” in tuning mode.F. counter panel panel 149.100MHz±50HzK2
PTT : ON160.100MHz±50HzM
Adjust [_
**]
2. Power 1) Maximum power Check More than 52W
output Set test mode
Select “HPOW” in tuning mode.“H.POW”
Adjust [256]
PTT : ON
3. High power 1) Set test mode 50.0W±2.0W
Select “HPOW” in...

ADJUSTMENT
Measurement
Test-
equipmentUnitTerminalAdjustment
Unit Parts MethodSpecifications/Remarks Condition
Item
26
TK-760HG/ 762HG
6. Modulation 1) Set test modePower meterRear ANT FrontCH/Make the de- (Wide/Narrow)
balanced MIC input : OFF Deviation panel panel modulation
• Wide Select “BAL” in tuning mode. meter waveform neat.
“_.BAL”
OscilloscopeDeviation meter filter
LPF : 3kHz AF VTVM Front MIC
HPF : OFF AG panel
De-emphasis : OFF
PTT : ON
Adjust [
***]
2) “_.B.A.L”
PTT : ON
Adjust [
***]
3)...

27
ADJUSTMENT
Measurement
Test-
equipmentUnitTerminalAdjustment
Unit Parts MethodSpecifications/Remarks Condition
Item
TK-760HG/ 762HG
2) “_.F.Q.T”Power meterRear ANT FrontCH/0.75kHz±50Hz (Wide/Narrow)
PTT : ON Deviation panel panel
Adjust [
***] meter
Oscilloscope3) “_.F.Q.T._.”
PTT : ON AF VTVM Front MIC
Adjust [
***] AG panel
• Narrow 4) “_FQT
***.” 0.35kHz
PTT : ON
Adjust [
***]
10. DQT 1) Set test mode Front
CH/0.75kHz±50Hz
deviationSelect “FDQT” in tuning mode.panel
• Wide “F.DQT”
Deviation meter...

ACE
BD
1
3
5
7 2
4
6
TK-760HG/ 762HG  PC BOARD VIEWS
28
DISPLAY UNIT (X54-3270-10) : TK-760HG
Component side viewDISPLAY UNIT (X54-3270-10) : TK-760HG
Foil side view
D804
D803
D805D802
J72-0683-02
CN801
MBL
5C
CE
CL E
E
SB
DI1 2
7 8
C801
C802
C803
C804C805 C806
C807
D801
D808
IC801
B
C
E
Q801
R801R802
R803
R804
R805
R806
R808
R809
L801
1
16
17 32 4849
64
33
D804D803D805D802
J72-0683-02
CN801
1 MBL
5C
CE
CLE
E
SB
DI2
78
C801
C802
C803
C804 C805C806
C807
D801
D808
IC801
B CE Q801
R801R802R803
R804
R805...

J H F D
BI
GECA
1
3
5
7 2
4
6
2930
PC BOARD VIEWS   TK-760HG/ 762HG
Component side
Foil side
D801
D804D803
J72-0684-02
CN801
1
MBL
5C
CE
CL E
E
SB
DI 2
7 8
IC8011
12
13 24 3637 48
25R803 R805
Q801
Q802Q803
Q805
R810
R809C801
C806
C808
C812
R812
R804
C804 R802
C803 C802R801
R808
C807 C805
R806 D802
R807 L801Q804
Q806
Q807
GS
D
G
S D G
S D GS
D
Q808
Q809
R813
R814
R815
R816D801D804
D803
J72-0684-02
CN801
1
MBL
5C
CE
CLE
E
SB
DI2
78
IC801 1
12
132436 37 48
25 R803R805
Q801Q802
Q803Q805
R810
R809 C801
C806...

A
BC
DE FGHIJ
KLMNO
PQRS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
C91
C67
R93
C104
Q32
L24
L20
L25
IC5
IC6
IC3
C10
C7
C3C60
C107 C75
Q9
C54
XF1
CN4
CN5C50
C131
C117C161
C160
R68 C74Q35
C46
C43
R44
IC4R78
IC7
C103
C98C81R71
Q12
C93 C99
C1
C5
C8
C11
C2 C6 C9 R201
C141
C144
C134
IC12
C32
C203
C207 C210
C212
L18
C213
L15
C138D37 C211
L13
L11
C86
C64CF2 CF1
R87 C96C97
C16
C17
C18
C19
C21 C15 C14 C13
R9
R10
R11R59
R19
C72
Q2
R91 R37R34
R56
R86D9
D41C40
R53 R52
R51
C84 IC11
R8
R7
R2 R202R66
R49
R40
TH1R177
R62...