Notes by EB5AGV
-Pages are in .TIF format, as originally published by Kenwood Italy
-Right-click on links and save the pages for further viewing
-Missing TIF pages: 20, 21, 22, 23, 25, 35, 36, 77, 78 and 80 (you can get most of them from the original PDF file but with lower quality)
-Fully missing pages: 77, 78 and 80 - any help obtaining these will be appreciated!
-Supposedly blank pages: 58, 68 and 92 (they are missing but probably were blank)
-UPDATE 20/6/2011 - I have found the original TIF files for pages 20, 21, 22, 23, 25, 35 and 36 and have been added to this page.
-UPDATE 20/6/2011 - UPDATED combined version with all that is available (courtesy of Randy K9OR): UPDATED COMBINED PDF file
INDEX
POWER SUPPLY CIRCUIT
1. Power is Not Turned ON (For models containing an AC power supply)...............................5
...............................................................................................................................................6
2. Power is Not Turned ON (For models with an external power supply) .............................. ..7
3. Power is Not Turned ON (For models with a software sense type power switch) .................8
4. The Voltage Cannot be Adjusted .........................................................................................9
5. Example ............................................................................................................................10
.......................................................................................................................................11 | 12
6. Models That Can Use Two-way Power Supplies (TS-711, TS-811, etc.)...........................13
..............................................................................................................................................14
RECEPTION CIRCUIT
1. No Reception (No Noise),..................................................................................................15
..........................................................................................................................16 | 17 | 18 | 19
2. Signals are Not Received (Noise is Output) ........................................................................20
..............................................................................................................................................21
3. Receiver Sensitivity is Low..................................................................................................22
4. The Reception Frequency Fluctuates and The Reception Tone is Wrong..............................23
..............................................................................................................................................24
5. Frequency Shift .................................................................................................................25
..............................................................................................................................................26
6. The Reception Tone Breaks ...............................................................................................27
7. Receive Tone distortion........... ...........................................................................................27
8. The sound is low ................................................................................................................28
9. S-meter..............................................................................................................................28
10. Cross Modulation ............................................................................................................29
11. Mobile and Handy Transceivers........................................................................................30
........................................................................................................................................31 | 32
TRANSMISSION CIRCUIT.............................................................................................33
1. Transmission is Impossible..................................................................................................34
........................................................................................................................................ 35 | 36
2. No Transmission Power is Output (The ON-AIR Indicator Lights)......................................37
2. Low Power (The ON-AIR Indicator Lights).......................................................................37
..............................................................................................................................................38
4. Cannot Adjust Power (The power cannot be adjusted by the ALC)....................................39
5. ALC Meter........................................................................................................................40
6. The Max Power is Low......................................................................................................41
7. SWR Meter.......................................................................................................................41
8. RF Meter and Power Meter...............................................................................................42
9. Break IN...........................................................................................................................43
10. VOX...............................................................................................................................43
11. PROC (Processor)..........................................................................................................43
12. Transmission Tone Quality is Poor...................................................................................44
13. Defective PLL.................................................................................................................45
14. Power Fluctuation ..........................................................................................................45
15. High Noise.....................................................................................................................46
16. Mobile and Handy Transceivers......................................................................................46
.............................................................................................................................. 47 | 48 | 49
DIGITAL CIRCUIT
1. Display Error....................................................................................................................50
2. How to Check The Microcomputer..................................................................................50
3. Nothing is Displayed ........................................................................................................51
4. The Display is Dark .........................................................................................................52
5. Meaningless Display or Display Error................................................................................53
6. Keys are Not Accepted....................................................................................................53
............................................................................................................................................54
7. How to Find Missing (holes in a board, broken patterns, capacitors or coils).....................55
8. Checking Waveforms With the Power ON ......................................................................56
9. Mobile and Handy Transceivers........................................................................................57
PLL CIRCUIT
1. PLL.................................................................................................................................59
2. Unlock.............................................................................................................................60
3. How to Check the PLL Data Lines (1).............................................................................61
4. How to Check the PLL Data Lines (2).............................................................................61
5. Tips for Repair (For Repairing PLLs)...............................................................................62
6. DDS (Direct Digital Synthesizer).......................................................................................63
7. TS-440 PLL Checkpoints................................................................................................64
8. TS-440 Last Loop Checkpoint........................................................................................65
9. Quick Chart of PLL IC Input/Output Pins.........................................................................66
10. PLLs of Mobile and Handy Transceivers.........................................................................67
AUXILIARY CIRCUITS
1. Noise Blanker .................................................................................................................69
2. Notch Circuit...................................................................................................................70
3. Encoders.........................................................................................................................71
.....................................................................................................................................72 | 73
4. RF Attenuator..................................................................................................................74
5. Filter Switching................................................................................................................75
6. Automatic Antenna Tuner (AT)........................................................................................76
............................................................................................................................... 77 | 78 | 79
SERVICE MANUAL
1. Reading the Service Manual.............................................................................................80
2. Rules for Parts Lists.........................................................................................................81
3. Adjustment......................................................................................................................82
.....................................................................................................................................83 | 84
4. Reading Circuit Diagrams ................................................................................................85
5. Functions of Components.................................................................................................85
...............................................................................................................................86 | 87 | 88
6. Rules for Naming Terminals .............................................................................................89
7. Reading Level Diagrams...................................................................................................90
8. Options............................................................................................................................91
ADDITIONAL INFORMATION 1 (To prevent repeated repairs)
1. TS-930, TS-940.............................................................................................................93
2. TS-950S/SD Final Transistor Failure...............................................................................94
3. TS-440 Unlock (R-5000) ..............................................................................................95
4. TS-940 Unlock..............................................................................................................95
5. TS-790..........................................................................................................................95
ADDITIONAL INFORMATION 2 (Measurements)
1. How to Estimate the Voltage..........................................................................................96
2. How to Measure the Radio Frequency Carrier Level (200MHz or Higher)......................96
3. How to Measure the Level With a Spectrum Analyzer....................................................96
4. Observing the Harmonic Spurious..................................................................................97
5. Check the Characteristics of the Band-Pass Filter With the Spectrum Analyzer ..............98
6. How to Measure SSB Sensitivity; 10dB S/N Method ...................................................99