Advertisement
nEeRen Beam unl -z.
6. Audio Trouble Analysis
1. Excessive line consumption
a. Check for shorted rectifiers HOO7, H804, H805.
b. Check for shorted transistors HOO1, HOO2. Check L002
for short.
2. No line consumption or zero bias.
a. Check
line cord, fuse, shorted
HOO5, HOO6, H713 &
H7 14.
b. Check for open rectifiers HOO7, H804, H805 or open
Lo02.
3. High hum and noise level.
a. Check filter capacitors C006, C703, & C704.
4. Parastic oscillation
a. Check
for defective
capacitors,
C705,
C706,
C713,
C714, C723 & C724.
5. Improper clipping
a. Check for proper adjustment of R729 & R730.
7. Voltage Conversion
This model is equipped with a universal power transformer to permit operation at 100, 120, 200,
220 and 240V AC 50 to 60Hz.
To convert the the Model 2215 to the required voltage perform the following steps:
(1) Remove the top cover.
(2) Remove
the Transformer
Wire
Connection
Terminal
Cover,
loosen
two
Cover
mounting
screws on the rear panel, see Fig. 1.
(3) Change the jumper wires as illustrated in Fig. 2 for the required AC voltage and replace the
fuse as instructed.
CAUTION:
DISCONNECT
POWER
SUPPLY
CORD
FROM
AC
OUTLET
BEFORE
CON-
VERTING VOLTAGE.
REMOVE
SCREW
REMOVE
THIS COVER
Figure 1.
Remove the Terminal Cover
Advertisement
