Vector G08 Series Faq page 28

CHASSIS TRANSISTORS
All the monitor chassis transistors are mounted in a socket with two machine screws. No soldering
is necessary; just unscrew the old one and replace. You cannot put these chassis transistors in
backwards; the leads are offset so they will only fit into the chassis and screw down in one
direction. If you put the transistors in backwards, the screw holes will not line up.
Make sure you install a new clear plastic Mica insulator between the transistor and the metal
monitor chassis. New ones are not included in the Zanen kit! If you have some white heat sink
grease, put a light coating on both sides of the Mica insulator.
NOTE: The transistors shipped with the Zanen and Bob Roberts kits are 2N3716s. These
transistors are not sufficient to work with the G08 monitor. Replace them with 2N6259s (if you can
find them) or MJ15024s. Keep the 2N3716s for your other vector monitors!
Important: after replacing the above transistors, before plugging them back into the deflection
board, use your DMM set to Ohms and check the continuity between the metal monitor chassis and
the metal case of the above transistors. There should be NO continuity! Unscrew the transistor and
check the mica insulator or pins to make sure they are not touching the heatsink. If there is
continuity, you will usually burn out R636, R637; R736, R737, and others in the pre-amplification
stage. You will probably also take out the deflection transistor involved as well.
You will most likely find bad solder joints at many of the connector pins, which should always be
reflowed.
If you have a G08-001, the MJ15003 transistors should be hooked up to pins 1-4 on the P600
connector (Y amp) and pins 5-7 on the P700 connector (X amp). MJ15004 transistors should be
hooked up to pins 5-7 on the P600 connector (Y amp) and pins 1-4 on the P700 connector (X amp).
Check your G08-001 schematics for reference.
Deflection Transistors
Location Part Number
Q605 2N6259
Q606 2N6259
Q705 2N6259
Q706 2N6259
G08 Vector Monitor Guide
Notes
Substitute is MJ15024
Substitute is MJ15024
Substitute is MJ15024
Substitute is MJ15024
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