Test Points
If there is a high voltage present at any of these test points, there may be something
wrong with your amp. Please have it checked by a qualified repair shop.
TP(1), TP(2):
These test points are both on the standby switch. When the amp is in
operation, these two points have a very high voltage present. By 10 minutes after
turning off the standby and power switches, all the voltage should have been drained.
TP(3):
This is the anode side of a solid state diode.
TP(4), TP(5):
These test points are the cathode pins of the preamp tubes. It is not a
bad idea to check these two pins on each one of the preamp tubes.
(
Tube Rectifier TP:
If your amp has a GZ34/5AR4 tube and no standby switch, then
check the GZ34 pins 2 and 8 for voltage.)
1
7
6
5
4
3
2
8 9
VOL
TREB
BASS
1
7
6
5
4
3
2
8
1
.5
K
47
0
1
7
6
5
4
3
2
8
47
0
1
.5
K
NORMAL
2
1
BRIGHT
MASTER
VOLUME
Jewel
Lamp
Holder
POWER
STANDBY
TP(1)
TP(2)
TP(3)
TP(4)
TP(5)
47
0
Inside View of Amp Chassis - not all components are shown
10