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World of Ham Radio 1997
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WOHR97_AmSoft_(1997-02-01).iso
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1997-02-01
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==============================================================================
K E N W O O D
>>> A M A T E U R R A D I O S E R V I C E B U L L E T I N <<<
==============================================================================
Kenwood Service Centers
Kenwood Service Corporation Kenwood Service Center, East
2201 East Dominguez Street 829 Lynnhaven Parkway, Suite 130
Long Beach, California 90801 Virginia Beach, Virginia 23452
Telephone 1-310-639-5300 Telephone 1-804-340-1702
==============================================================================
BULLETIN # 7
MODEL: T-599D
SUBJECT: SERVICE NOTES
1. No ALC - Drive 10 Meters: Check for loose contact at
oscillator wafer on coil pack.
2. No TX any band: Check T-1 on generator board
(X52-0009-00).
3. No TX: Bad driver FET Q1 3SK22 (GR) on X47-0004-00.
4. No relay action when TX: Bad Q8 2SA562 (Y). When
replacing Q8 change resistor R16 to 4.7 ohms.
5. Rubber belt slipping on drive and load. TKC has chain
modification kit.
6. No drive when shock: Check for loose output terminal at
carrier unit (X50-0002-00).
7. Low Power 75 Meters: Check for shorting terminals at
final rotary switch (S10-1002-05).
8. No output on any band: Check T-2 on GEN unit (X42-0009-00).
9. No TX: Check final relay for burned contacts. (S51-4017-15).
10. Bias current too high and blows fuse. Check for bad S-2001A and
shorted cathode resistors, 10 ohm.
11. Cannot neutralize: Make sure shield is properly installed on driver
12BY7A.
12. No output from generator unit (X52-0009-00): Bad Q4 TA7045.
13. No 9 volt out at AVR (X43-010-00): Check Q1 2SA606 (L).
14. Low output power: If American 12BY7 is used in driver circuit, this
can cause parasitic oscillation. Please use standard Kenwood
replacement tubes.
15. Blows Fuse: Check for shorted electrolytics at power supply
(X43-011-00).
16. AC hum on SSB transmission: Send for TKC bulletin.