Akai 1700

cee oS
2. Recording Problems.
(Unit
plays
back
pre-recorded
tapes
okay,
but
recording
not
satisfactory.)
No recording possible.
Sound distorte:
Erasing problems.
VU-meter does not read on record.
Defective microphone.
Check and replace microphone.
Input jack does not keep good contact.
Check and readjust input jack.
REG/PLAY rotary s¥itch does not function properly. }|
Check record lever which actuates rotary switch.
VW0-meter reads okay on recon. |—
;—{ Defective record/play head.
|__oneck record /play head; replace if necessary.
VU-meter functions normally; record-
ing monitor through external earphone
also normal.
‘VU-meter functions normally but re-
cording monitor through earphone
abnormal
Defective Cll, R10, RI:
Check Cll, R10 and Ri5,
Broken lead wire in recording circuit.
Check lead wires and repair.
Faulty recording bias circuit.
Faulty constant current circuit.
Measure recording bias voltage. Check Vila, Rl
R16, C15, and C17
Lower recording input level by volume control.
Excessive recording input level.
REC/PLAY Rotary switch does not function properly. L]
Check record lever which actuates rotary switch,
Defective microphone or defective external amplifier.
Check and replace.
yU-meter lost sensitivity.
Unit does not erase at all. |_| Defective erase head.
Incomplete erasure.
r Defective Cl4.
Broken lead wire in erasing circuit.
Replace VU-meter.
[Check with tester and replace head if coil burned out.
Dust on heads, Clean heads.
Erasing bias voltage not high enough. Check Via, Ri, R16, C17, G14,
TE C14, also measure erasing(bias) voltage.
Check lead wires and repiar.
[Check and replace.
Head coil being shorted.
Clean heads.
Insufficient treble on reco
Noisy recording. (Constant and loud
background noise recorded on tape.)
Dust on heads.
Recording bias voltage out of adjustment.
Check bias voltage with VIVM (Vacuum Tube Volt
Meter) and re-adjust to regular voltage.
Defective recording tape.
Replace recording tape.
Recording bias wave-form distorted. |—J check Via, Ll, 017, 016, C14,
Low
recording
sensitivity.
H——__{
VU-meter
functions
normally.
[Worout tape heads, }[Ropace head assem
Recording tape lost sensitivity.
Check and replace tape.
‘Clean heads.
Dust on heads.
Defective head.
Defective R10 or R15, Replace R10 or R16,
Check and replace head.