Akai X-165D Service Manual page 20

2. Recording problems.
VU meter itself defective or
Does not record No VU meter indication lesd Wire détechive —— Replace
Defective Input jack ———~---—— Replace
REC/PLAY slide switch does Check record lever which
not function properly actuates slide switch
VU meter indication normal Transistor (TR-101) defective Replace
_
Bias head does not move ———+—~ Adjust
Loose connection of P8 and J8 ——- Adjust
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Components of oscillator circuit
or oscillator coil defective
VU-meter functions normally ;
Sound distorted recording monitor through
headphones also normal
P . ree Check recording bias voltage and
Faulty recording bias circuit 7 S e a c e
components of oscillator circuit
Faulty recording Check transistor (TR-101)
equalization circuit and L-102 (peaking coil)
_
Dust adhering to head surface Clean
VU-meter functions normally
but recording monitor Over recording input level————- Turn the volume down a little
through headphones abnormal
VU-meter lost sensitivity -—————— Replace
ae
Defective input equipment
(microphone, etc.)
Faulty erasing Does not erase at all Erase head defective ————+--—-Replace
Disconnected wire of erase head.
Excessive amount of — Adjust
dust adhering to surface of
erase head
Transistor (TR-401, 402)
7
Incomplete erasure ~——---—- Erasing bias voltage low aetesiws
Oscillator coil defective
Erase head coil defective
Erasing noise Defective recording tape——~—~~-~--— Replace
(Popping noise)
Transistor (TR-6) defective -———— Replace
Head magnetized ann Demagnetize head
Bias voltage out of adjustment Re-adjust
Recording sensitivity low VU meter functions normally | Dust adhering to head surface Clean
Bias voitage out of adjustment Re-adjust
Transistor (TR-101) defective Replace
Tape itself defective —_—————Reep lace
VU meter does not Loose connection of Adjust
indicate properly the Input jack
VU meter sensitivity low ~~" Replace
REC/PLAY slide switch does :
—— Adjust
not function properly
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