TC- 446 Service Manual
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Start
Turn to max. VOL; Hold down
MONI; around 2.8V (limit) audio
output at SPK plug?
Check SPK plug,
SPK, spring;
Replace faulty
components;
1 KHz audio input at
IC8(AF AMP) pin1?
Check VR1 and its wiring to IC8;
Replace faulty components.
Hold down MONI;
6V voltage at IC8
pin8?
Hold down MONI; 5V
output at IC11 pin40
(AVP)?
Audio output
at IC8 pin 7
?
Check if Q39
and Q12
conductive;
Replace faulty
components.
Check C203, c239;
Replace faulty
components.
See control
section
troubleshooting
Check R203, R37, C84,
C66;
Check IC8 and peripheral
components;
Replace
faulty components.
Q41
conductive?
Summary of Contents for TC-446
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