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                             K E N W O O D
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                        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

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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.