Technics SL-BD21 - Troubleshooting

@ TROUBLESHOOTING
Turntable does
AC power plug is connected?
Connect the AC power plug
not rotate. to an AC wall socket.
Belt is set over the turntable capstan? Set the belt correctly.
Release the tonearm from the arm rest and move it
slightly towards the center. (The platter will start
turning.)
y
The start/stop switch goes on when the PU fixing PU fixing plate connection to
plate is moved (rotated)? start/stop switch defective.
Y
T1 (Power-transformer) | detec.|
Cathode voltage of D3 is 10V~13V DC? S1 (Start/stop switch) frive
D1~D4 (Rectifier diode),
== =
Voltage between IC101 terminals 3 and 1 is 1.0V~1.4V 1C101, D101
pe? [_ | 104, Motor } dotective
;
:
Motor,
C103.
Voltage between FC3@ and FC3@ of drive P.C.B. is . ‘
; >| R101~R104 defective
I~ 2
3.0V~4.5V DC in 33 rpm and 4.0V~5.5V DC in 45 rpm? VR101, VR102
No sound Check the resistance at output pin plug (left and right
comes out. channels).
O~ a few ohms
Check if shorted circuit at pin plug or lug terminal or
connector or cartridge.
Check if opened circuit at pin plug or lug terminal or
connector or cartridge.
—_I
amplifier.
—12—
Check if sequently connected to amplifier or check