Technics SAEX310 - RECEIVER, Руководство по обслуживанию

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SA-EX310
REQUIRED ITEMS
1. Testing with a CD player ––––––– Test disc (SZZP1054C / first progarm, 1kHz, 0dB)
2. Testing with a tape deck––––––– Test tape (QZZCLA / 315Hz, 0dB)
3. Testing with a AF oscillator ––––––– Set the output at 500Hz, 200mV
4. Oscilloscope (min. 10MHz) ----------- To measure the output waveform at the test points.
TEST PROCEDURE FOR AMPLIFIER CIRCUIT
When the CD player AF oscillator is connected: When the tape deck is connected:
Troubleshooting
This unit has test points on each circuit board block for use in troubleshooting.
CONNECTION
Connect either a CD player, tape deck or AF oscillator to the input terminals of the unit.
( ( )
)
Power on the unit.
Set the input selector button of the unit to the "TAPE MONITOR"
postion.
Set the Speaker ON/OFF button of the unit to the SPEAKERS
"ON" position.
Run the tape deck
QZZCLA
315Hz, 0dB
(
)
Using the Oscilloscope, check the output waveforms at the test
points on the circuit boards of the unit in the following order:
(L1,R1) (L2,R2) (L3,R3) (L5,R5) (L6,R6).
Refer to page 10.
TEST POINTS POSITIONS OF AMPLIFIER CIRCUIT
Note: Connect the '+' probe of
the oscilloscope to each
test point and the '–'
probe to chassis ground.
Power on the unit.
Set the input selector button of the unit to the "CD" postion.
Set the Speaker select buttons of the unit to the SPEAKERS "
ON" position.
Run the CD player or Run the AF oscillator
SZZP1054C / first program Oscillator output
1kHz, 0dB at 500Hz, 200mV
MAIN P.C.B. ( component side )
PANEL P.C.B. ( component side )
R6
L6
R5
L5
L1
R1
+
+
C1001
C1002
J248
J247
J319
J318
L2
C1004
C1067
R2
+
R3 L3
VR502