Technics SL-BD22D Service Manual

@ TROUBLESHOOTING
No sound
‘comes out.
Check the resistance at output pin plug (left and right
channels).
Strobe LED
does not
indicate.
Turntable does
not rotate.
4
O~ a few ohms || Check if shorted circuit at pin plug or lug terminal or
connector or cartridge.
22 (open)
Check if opened circuit at pin plug or lug terminal or
connector or cartridge
Check if sequently connected to amplifier or check
amplifier.
Strobe LED drive circuit
Wavetorm
of
collector
of
Q201
Lis
8.2ms
-
Connect
the
AC
power
plug
to
AC
power
plug
is
connected
ah
AC
wall
achat,
ae
ee
ee
ese
i
-—
Belt
is
set
over
the
turntable
capstan?
Set
the
belt
correctly.
Q201,
202
(Drive
transistor)
0201~0207
R201~R205
defective
——_—_—_—<__—_—_
T1 (Power
transformer)
$1 (Power switch)
01~D4
(Rectifier
}defective
diode)
IC1 (Regulator IC)
1C101 (Drive IC)
Power source circuit
1. AC 14V between FC2 terminals © and ©.
2. OC voltage of regulator IC (IC1)
@12v @6v @ov
3. OC voltage at terminal @ of 1C101 (3V).
Ss
Drive
circuit
1€101
(Drive
IC)
*DC
voltage
of
drive
transistor
(0101)
0101
(Drive
Base
|
Collector
|
Emitter
|
transistor)
defective
33
rom
1.5V
1
6.3V
i
Motor
45
rpm
|
1.6V
5.2V
R108,109
(Resistor)

Technics SL-BD22D Specifications

General

Brand	Technics
Model	SL-BD22D
Category	Turntable
Language	English