Teac A-5500 - Page 44

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MALFUNCTION:
Both Reel motors
inop.
Inoperative in
FWD play
-POSSLBLE--SOURCE-OF-FROUBLE|-
a. Specified +5 VDC not
present at pin #1 on
the Drive unit
b. Brakes not disengaged
c. Specified voltage of
22 VDC not present at
either motor terminal
132-2.
TROUBLESHOOTING
CORRECTIVE. PROCEDURE 0 ps2
a. Check Drive unit; check
F3 (1A fuse) in Rectifier
circuit
b. Transistor Q134 on Right
Reel Assy.
c. GRN wire at Power Trans
disconnected.
a. Pinch-roller does not
engage with capstan
b. Brakes not disengaged
pee 1) Defective transistors
Q121, Q122, Q123, Q124,
Q125 or Q126;
2) Control Unit defective
if specified High Level
signal not present. at
J41 pins #9 and #11
b. Transistor Q134 on Right
Reel assy.
Inoperative
in
a.
Reverse
relay
K901/
|
a.
Check
transistor
Q130
REV play
Fast Forward or
Rewind modes
inoperative
Playback audio
intermittent or
absent
K902 not engaging
b. Defective Capstan
Servo assy
c. Specified High Level
signal of Control unit
a. Defective Reel Drive
b. Specified High Level
signal not present
at. J41 pins #7 or #8
of the Control unit
b. Repair/replace
c. Defective Control unit
a. Check transistors Q71,
Q72, Q75, Q76, Q80, Q83,
Q84, associated parts
b. Replace/repair defective
Control unit
a. Muting Circuit on the
Playback EQ PC Bd is
activated by malfunc-
tion
b. Specified voltage of 24
VDC not present at
Stabilizer unit pins
5 or 6
c. Specified voltage of 34
VDC unit, pins 3 or 4
d. Specified signal not
present at the Play
Ampl PC Bd, pins 1, 14
e. Specified signal not
present at Play Ampl
pc Bd pins 4, 11
£. MONITOR switch at
SOURCE or defective
—42—
a. Defective transistors Q207
or Q209; DZ201; or associated
parts
b. Defective transistors Q401,
Q402 or associated parts
c. Rectifier circuit fuse (2A)
burned out
d. Repair EQ PC Bd or Replace
e. Repair or replace Play Ampl
PC Bd
£. Place at TAPE, repair or
replace