Teac A-4070G - Page 32

9 TROUBLE SHOOTING
The following guide lists specific difficulties that could
occur in the A-4070G.
Several possible causes are listed for each malfunction.
Visually inspect the unit for any damage such as broken or
burned components or wiring, loose connections, etc.
Capstan fails to
turn
Pinch roller fails
to contact capstan
in play mode
Right reel does not
rotate in the
forward play mode
Left reel does not
rotate in the
forward
Right reel does not
rotate in the
reverse play mode
Left reel does not
rotate in the
reverse play mode
Tape transport does
not operate in fast
forward
No delay
Wow and flutter
Incorrect tape speed
Belt off or slipping, line
fuse, shut off SW (S-805,
S-806), phase advance cap.
(C-801), shut off relay
(K-8a), reverse relay (K-2a
~b), capstan motor, capstan
assy.
Remote control jumper plug
not installed or loose,
stop SW(S-804), play button
(S-801), delay relay (K-4a),
fast relay(K-5c), play relay
(K-1b), micro SW(S-807),
solenoid.
Reverse relay(K-2c),
fast relay(K-5a),
resistor (R-801).
Reverse relay(K-2c),
fast relay(K-5b),
resistors (R-802,R-803).
Reverse relay(K-2c),
fast relay (K-5a),
Resistor(R~-802, R-803)
Reverse relay(K-2d),
fast relay(K-5b),
resistor(R-801).
Fast relay(K-5,K-lla),
fast SW(S-803),
Diodes (D-8,D-6).
Delay relay(K-4),
cap. (C-807,C-808), reverse
relay (K-3cvd) , resistor
(R-805) , Diode(D-5).
Defective tape, dirty or
defective pinch roller,
oily or defective belt,
reel motor tension.
50/60Hz cycle change knob
in wrong position.
Incorrect pinch roller
pressure.
Refer to schematic diagram
and repair or replace the
defective components.
The normal DC resistance of
the capstan solenoid is 1.3
kQ.
Refer to schematic diagram
and repair or replace the
defective components.
Refer to schematic diagram
and repair or replace the
defective components.
Refer to schematic diagram
and repair or replace the
defective components,
Refer to schematic diagram
and repair or replace the
defective components,
Repair or replace defective
components.
Refer to schematic diagram
and repair or replace the
defective components,
Repair or replace defective
components.
Clean or replace defective
components.
Adjust motor tension
Reset change knob.
Adjust pinch roller pressure.