Teac X-3R User manual

TEAC.
SERVICE MANUAL
X-3R
Stereo Tape Deck
Effective: August, 1981 A10046 : 5704910500

X-3R
1 SPECIFICATIONS AND SERVICE DATA
SPECIFICATIONS
Track system 4-track two-channel stereo
Head system 3 heads: erase, record, playback
Reel size 7” and 5”
Tape speed 19 cm/s (7-1/2 ips) and 9.5 cm/s (3-3/4 ips)
Inputs (level and impedance)
MIC: Specified input level: —60 dB (0.775 mV)/10 kohms
Min. input level: —70 dB (245 pV)
LINE IN: Specified input level: —12 dB (195 mV)/50 kohms
Min. input level: —22 dB (61.5 mV)
Outputs (level and impedance)
OUTPUT: Specified output level: —5 dB (436 mV)/10 kohms
Max. output level: +1 dB (0.869 V)
PHONES: Specified output level: —24 dB (48.9 mV)/8 ohms
Playback equalization
“LH” tape: 19 cm/s: 3,180 us + 50 us (NAB)
9.5 cm/s: 3,180 us + 90 us (NAB)
“EE” tape: 19 cm/s: 3,180 us + 35 us
9.5 cm/s: 3,180 us + 50 us
Motors 1 DC servo capstan motor
2 Induction ree! motors
Bias frequency 100 kHz
Operating position Vertical, horizontal
Power requirements
100/120/220/240 V AC, 50/60 Hz, 85 W (General export model)
120 V AC, 60 Hz, 70 W (USA/Canada)
220 V AC, 50 Hz, 85 W (Europe)
240 V AC, 50 Hz, 85 W (UK/AUS)
Weight 15 kg (33-1/16 Ibs) net
6-1/2” (165mm)
9-1/8" (234mm)
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14. 1/2" (367mm)
12. 2/8" (326mm)
14” (355mm)
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16 - 1/8" {410mm} _
17 - 5/16" (440mm)
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Broken line indicates some General Export models.
Fig. 1-1
SERVICE DATA
MECHANICAL
Tape speed deviation 3,000 Hz +30 Hz
Tape speed drift 20 Hz
Wow and flutter
Playback: 0.06% (WRMS), 0.12% (RMS) at 19 cm/s
0.10% (WRMS), 0.15% (RMS) at 9.5 cm/s
0.08% (WRMS) at 19 cm/s
0.15% (WRMS) at 9.5 cm/s
1.5 to 1.7 kg (3.31 to 3.75 Ibs)
Record/playback:
Pinch roller pressure
Reel torque (play mode)
Take-up:
Back tension:
Brake torque
Forward direction: 1200 to 1400 g-cm (16.7 to 19.4 02-inch)
Reverse direction: 500 to 700 g-cm (6.94 to 9.72 oz-inch)
Left/right deviation: 150 g-cm (2.09 oz-inch)
Fast winding time 140 seconds or less for 550 m (1800 feet)
330 to 470 g-cm (4.58 to 6.53 oz-inch)
220 to 280 g-cm (3.06 to 3.89 oz-inch)
ELECTRICAL
Frequency response
See Figs, 3-6 to 3-9,
Signal-to-noise ratio
Playback
[| tsems | asemis
249 dB 247 dB
251dB 249 dB
Overall
|| tems | 9.5 emis |
LH() | 247dB 245 dB
EE 248 dB 246 dB
Erase efficiency
70 dB min. at 1 kHz (measured with input
10 dB higher than the specified input level)
Channel separation 50 dB min. at 1 kHz
Adjacent track crosstalk 40 dB min. at 125 Hz
Total harmonic distortion 1.0% or less at 1 kHz with “LH (I)”
tape
1.5% or less at 1 kHz with “EE” tape
NOTES:
1. Improvements may result in changes in the SPECIFICATIONS
AND SERVICE DATA.
2. 0 dB is referenced to 0.775 V, unless otherwise specified.
3. Playback performance specifications refer to operation in both
forward and reverse play modes.
CAUTION
Z\ Parts marked with this sign are safety critical components.
they must always be replaced with identical components
— refer to the appropriate parts list and ensure exact re-
placement.

X-3R
2 MECHANICAL ADJUSTMENT AND CHECKS
2-1 CAPSTAN THRUST CLEARANCE
1. There must be a clearance of 0.1 to 0.3 mm between the capstan
shaft and the thrust plate. Check to see that the clearance is
within this range. 1f not, loosen the two screws on the flywheel,
adjust the clearance, and retighten the screws,
Flywheel
0.1 ~ 0.3 mm
Capstan Shaft
Adjust two screws
Thrust Plate
with Allen wrench
Fig. 2-1
2-2 SHUT-OFF SWITCH POSITION
1. There must be a clearance of 1 to 1.5 mm between the cam and
actuator(A) when the microswitch is off, and 0.5 mm between
the microswitch and actuator(B) when the microswitch is on.
Check to see that the clearance is within these values. If not,
adjust as necessary.
Microswitch
Adjust Screw
Fig. 2-2
Adjust Screw
Actuator (B)
Actuator (A)
2-3 BRAKE MECHANISM
NOTE: Be sure that the power is turned off prior to making any
adjustments to the brakes,
1. Screw(A) for the left brake (as viewed from the front) must be
adjusted so that there is a clearance of 1 mm between lever(C)
and lever(E). Screw(A) for the right brake must then be adjusted
so that lever(B) is parallel to lever(C).
2. Push the plunger until there is contact at (a); i.e., until the clear-
ance has been eliminated, but make sure that the plunger is not
pushed so strongly that the levers (E) (C), and (B) are deflected
— they must remain in a horizontal plane.
3. Position the solenoid housing, while the plunger is pushed as des-
cribed in step #2 above, so that the gap at (f) (the distance be-
tween the leftmost edge of the plunger and the leftmost edge of
the solenoid housing) is between 11 to 12 mm. When the solenoid
housing is so positioned, the plunger should be able to be deflect-
ed between 1 to 2 mm when pushed strongly.
Adjust
Solenoid Position
al
(f) =11~12mm
PUSH Plunger
Lever (E)
Left Reel Table
Fig. 2-3

X:3R
24 BRAKE TORQUE
NOTE: Before making any brake adjustments or measurements,
make sure the power is off,
1. Mount an empty 7” reel onto either reel table and attach a
spring scale to the reel with a string.
2. Smoothly pull the scale away from the reel under test and note
the torque value when the reading on the scale is steady. The
proper torque values are given in the chart below.
3. Follow steps 1 and 2 for each measuring condition; i.e., (A)
through (D) in Fig. 2-4.
4, If the forward-direction torque is not correct, change the hook-
ing position of the spring hanger (reference (D) in Fig. 2-3) for
the corresponding brake requiring adjustment. If, after the for-
ward-direction torque has been properly adjusted and the reverse-
direction torque is not correct, or the forward-direction torque is
still not correct, check to see if the brake felt pad is worn, and
also check that the brake mechanism is properly aligned as ex-
plained in Section 2-3, “Brake Mechanism”. If necessary, replace
the entire reel table.
Radius
1200 — 1400 g-cm
(16.7 — 19.4 02-inch)
i Forward direction (B) (C)
4
|
500 — 700 g-cm
(6.94 — 9.72 oz-inch)
Reverse direction (A) (D)
150 g-cm
Left/Right deviation (2.09 oz-inch)
Torque calculating formulas:
1. Torque (in g-cm or oz-inch)
= Force or Weight (in g or 0z) x Radius (in cm or inch)
2. Conversion of g-cm to oz-inch:
g-cm x 0.0139 = oz-inch
Fig. 2-4
2-5 REEL MOTOR TORQUE
TAKE-UP TORQUE
1.
2.
Hold the right tension arm up using a rubber band.
Mount an empty 7” reel onto the right (left) reel table, and
attach a spring scale to the reel with a string.
Place the deck in the forward (reverse) play mode.
Allow the rotation of the reel to slowly pull the scale toward the
reel,
Hold the spring scale with enough force to allow a steady reading.
Measure the take-up torque. The proper values are given in the
chart below.
There is no specially-provided adjustment for take-up torque, so
if correction is needed, repair or replace the defective part and/
or circuit.
,
| Spring Scale
Radius
330 to 470 g-cm
(4.58 to 6.53 02-inch)
220 to 280 g-cm
(3.06 to 3.89 oz-inch)
(B) in REV
(D) in FWD
(A) in FWD
(C) in REV
Take-up:
Back tension:
NOTE: For torque calculation, refer to the formulas provided
in Fig, 2-4.
Fig. 2-5

BACK TENSION
8.
9.
10.
11.
12.
Place the deck in reverse (forward) play mode.
Using a steady, smooth motion, pull against the motor torque
to draw the scale away from the reel.
After making sure that the reel motion is smooth (the string
should not be rubbing against the reel flanges), note the value in-
dicated on the scale.
The proper values are given in Fig. 2-5.
If necessary, adjust the slider of resistor (R802) until the proper
torque values in both forward and reverse play modes are ob-
tained. See Fig. 2-6.
Resister
(R802)
Slider
Fig. 2-6
X-3R
2-6 PINCH ROLLER PRESSURE
. Hold the right tension arm up using a rubber band, string, etc.
. Place the deck in the forward play mode without threading any
tape.
. Attach a spring scale to the pinch roller as shown in Fig. 2-7.
. Pull the pinch roller away from the capstan shaft (on a plane in-
tersecting the center of the capstan shaft and the pinch roller)
until the capstan shaft and the pinch roller are separated.
. Ease pressure on the scale until the pinch roller just begins to
turn. The scale should then read 1.5 kg to 1.7 kg (3.31 Ibs to
3.75 Ibs),
. By pressing the DIRECTION switch, change play mode to reverse
direction and measure in the same way as previously described.
Specification is the same as that for forward play mode,
Adjust Screw
Pinch Roller
Spring Scale
Fig. 2-7

X-3R
2-7 REEL TABLE HEIGHT
1.
As
a
general
reference,
the
height
of
the
reel
table
should
rough-
ly
correspond
to
a
distance
of
38
mm
(1-7/16")
between
the
chassis
of
the
deck
and
the
rubber
mat
on
the
reel
table.
If
check-
ing
reveals
any
large
deviation
from
this
value,
loosen
the
two
ad-
justment
screws
on
the
reel
table,
adjust
the
height,
and
retight-
en
the
screws.
.
For
fine-adjustment,
check
that,
while
in
fast-forward
or
rewind
modes
starting
at
the
beginning
of
the
tape,
the
tape
does
not
-
touch the upper or lower reel flanges. If it does, fine-adjust ac-
cordingly.
th Standard Empty Reel
Reel Table
FREQUENCY COUNTER
wow & FLUTTER METER
DECK
under TEST
T4838
Fig. 2-9
o
Laws]
Lama]
oe
o
=
=>
o
io]
°
Motor Servo P.C.B.
Fig. 2-8
2-8
TAPE
SPEED
Fig.
2-10
NOTE: Conduct the following steps in both forward and reverse
play
modes,
2-9
WOW
AND
FLUTTER
1. Connect a frequency counter to either OUTPUT jack. (See Fig. PLAYBACK
29). NOTE: This paragraph applies to both forward and reverse play
. Load a TEAC YTT-2003 test tape containing a 3000-Hz test modes,
tone, and set the SPEED switch to HIGH (19 cm/sec or 7-1/2
ips).
. Play the middle of the test tape and adjust the HIGH speed trim-
mer resistor until the frequency counter indicates a reading of
3000 Hz (+5 Hz). See Fig. 2-10. (CAUTION: Use an insulated
screwdriver to prevent shorting.)
. Playing the tape at both the beginning and the end, check that
the tape speed does not vary any more than the limits prescribed
in the specifications, so that there is never a total deviation of
more than +30 Hz from the 3000-Hz test tone, nor a drift of
more than 20 Hz at any given time.
. Usinga TEAC YTT-2002 test tape, repeat steps #3 and #4 above
with the SPEED switch set to LOW (9.5 cm/sec or 3-3/4 ips). In
step #3, the speed may be adjusted for the proper initial setting
by using the LOW speed trimmer resistor.
. Connect a wow-and-flutter meter to the deck as shown in Fig.
2-9.
. Load a TEAC YTT-2003 test tape to check the wow and flutter
when the deck is set to HIGH speed, or a YTT-2002 test tape to
check when set to LOW speed.
. Play the beginning and end of the respective test tape for each
speed setting. The measured wow and flutter should be at least
0.06% (WRMS) and 0.12% (RMS) for the HIGH speed setting
and at least 0.10% (WRMS) and 0.15% (RMS) for the LOW
speed setting.
OVERALL
4. Load TEAC YTT-8013 test tape and record a 3000-Hz signal
on it inboth HIGH and LOW speed settings and at the beginning
and end of the tape, and while recording the signal, simultaneous-
ly monitor the signal from the play head by setting the MONI-
TOR switch to the TAPE position (raised position).
. The wow-and-flutter meter should indicate a reading of no more
than 0.08% (WRMS) in the HIGH speed setting and no more
than 0.15% (WRMS) in the LOW speed setting.

2-10 HEAD AND TAPE PATH ALIGNMENT
1. By visual observation, align the erase, record, and playback heads
so that the proper tilt is obtained for each.
2. Coarse-adjust the azimuth of the erase, record, and playback
heads by observing each without a tape threaded.
3. Load a TEAC YTT-8013 test tape and play it in the forward direc-
tion.
4, Fine-adjust the height of each head as shown in Fig. 2-12. When
adjusting, make sure ail the screws are turned proportionately
so that the tilt and azimuth previously adjusted is not altered.
5. If required, coarse adjust any head requiring tangency correction.
© @
°
@
Hae
eo”
2
°
©
Ur al
a . I —| ==] hie
@ Azimuth
© Height and titt
Fig. 2-11 ©) _ Tangency
Example of
Condition
misalignment
TILT
The head surface should be parallel to the
tape guide pin surface.
AZIMUTH
The gap of the head core should be perpen-
dicular to the tape path.
HEIGHT
(A) Erase head
The upper edge of the upper core of the head
should protrude 0.1 mm above the upper edge
of the tape.
(B) Record head
The brass-colored spacer of the head should
appear about as thin as a pencil line above
the tape,
(C) Playback head
The distance from the top head core to the
top edge of the tape and from the bottom
head core to the bottom edge of the tape
should be equal.
TANGENCY
The dotted line should be perpendicular
to the surface of the tape.
Fig. 2-12 Head alignment conditions
X-3R
2-11 REVERSE GUIDE HEIGHT
1. Check, and if necessary, align head and tape path mentioned in
2-10.
2. Thread a TEAC YTT-8013 test tape on the deck, and in the re-
verse direction run the tape at the beginning and the end of the
tape.
3. Check that tape moves exactly on the center of the playback
head, i.e., that playback head height (refer to Fig. 2-12) is also
maintained in reverse play mode.
4. If not, loosen the set screw and turn the reverse guide clockwise
or counterclockwise for adjustment, then retighten set screw.
© down SS)
) ES {C reverse guide pes 5
BY eR
set screw
Fig. 2-13
2-12 FREQUENCY AND VOLTAGE CONVERSION
General Export Models Only:
If it is necessary to change the frequency and line voltage settings,
follow the instructions below:
ALWAYS DISCONNECT THE POWER LINE CORD BEFORE
MAKING THESE ADJUSTMENTS.
1. Remove the metal housing*covering the top and sides of the deck
by unscrewing the three screws from each side.
2. Locate the voltage selector on the right (as seen from the front).
The frequency selectors are located near each motor as illustrat-
ed.
VOLTAGE CONVERSION:
3. Turn the slotted center post of the selector with a screwdriver or
coin as illustrated until the proper setting is obtained.
FREQUENCY CONVERSION:
4, For each reel motor, loosen the screws on the respective fre-
quency selector bar and jumper the bar to the terminal corre-
sponding to the AC line frequency of your area, then retighten
the screws.
5. Replace the housing and retighten the screws.
* Decks in some areas have a wooden case which can be removed by
unscrewing the screws on the bottom (feet) and sides.
Fig.

X-3R
2-13 LUBRICATION
Oiling is needed after every 1,000 hours of operation or once a
year if the deck is used infrequently. TEAC spindle oil (from TEAC
TZ-255 oil kit), Mobil D.T.E. Oil Light, and similar types of oil are
recommended, Lubrication is normally not necessary except at the
points shown.
1. Place the deck in a horizontal position.
2. Apply a few drops of oil to the respective spindles shown, except
the capstan and the reel motors, Spread the oil evenly on the
spindle surfaces using a cotton cloth or similar applicator.
3. For the capstan and reel motors, apply a few drops to the indi-
cated positions but do not spread the oil.
4. After oiling all points, operate the deck fer 1 to 2 hours until the
oil is thoroughly absorbed. Fig. 2-15
3 ELECTRICAL ADJUSTMENT AND CHECKS
NOTES:
1,
Clean
and
demagnetize
the
entire
tape
path
prior
to
3-1
POWER
SUPPLY
CHECK
making
any
adjustments
or
checks,
2. Make sure that the deck is properly set for the volt-
age in your area.
3. Adjustments and checks are generally done in order
of L-ch, then R-ch. Double reference numbers in-
dicate L-ch/R-ch, (Example: R121/R221) R & P AMPL PCB
4. 0B is referenced to 0.775 V. If an AC voltmeter is
used which references 0 dB to 1 V, appropriate com-
pensation must be made,
5. An AC voltmeter with an input impedance of 1M
ohms or more must be used.
6. In the charts, instruction in the MODE/INSTRUC-
TION column at each step is continued from pre-
vious step indication unless specified here.
1. Connect a DC voltmeter to pin 15 of U102 on the R & P
AMPL PCB.
2. The DC voltage shoud be +12 V. (See Fig. 3-1)
DC VOLTMETER
3-2. MONITOR PERFORMANCE Deck settings: MONITOR sw.: SOURCE
MODE/ SIGNAL ADJUST
INSTRUCTION SOURCE (or CHECK) Suyrar REMARKS
MIC
cont:
MIN
rare,
LINE
cont:
MAX
pia
an
na
R123/R223
+1
dB
(0.869
V)
Par
g
min,
input
OUTPUT
cont:
MAX
.
OUTPUT cont.
(L/R)
Specified
if
channels
do
position
for
1. MONITOR not match, re- —5 dB (436 mV) OUTPUT
control
output adjust R123/
R223 to corres-
pond to the
lower OUTPUT,
IMPORTANT: After setting OUTPUT control (L/R), always leave in specified position.
OUTPUT
cont:
400
Hz/—12
dB
LINE
cont
Specified
position
Spec.
position
(195
mV)
mts
for
LINE
control

X-3R
ADJUST
(or
CHECK)
OUTPUT
REMARKS
MODE/ SIGNAL
CONNECTION INSTRUCTION SOURCE
: LINE cont: 400 Hz/—12 dB
2-1) Fig. 3-2 Spec. position (1-3) (195 mV) RISMAZ Peony Umater
3.
MIC
input
ig.
3-2
but
MIC
cont:
MAX
400
Hz/—70
dB
Check
—5
dB+2dB
MIC
min.
input
INE
IN
>
MIC
LINE
cont:
MIN
(245
pV)
(346
mV
to
548
mV)
|
tevel
4.
PHONES
LINE
cont:
output
Fig.
3-3
Spec.
position
(1-3)
baer
ana
Check
iBeuee
5
mV)
MIC cont: MIN
IMPORTANT:
After
step
4-1
is
completed,
do
not
alter
any
of
the
controls
during
later
checks.
OSCILLOSCOPE AC Voltmeter
OSCILLATOR DISTORTION ANALYZER
AC Voltmeter
DECK under TEST
tkHz FILTER
PHONE S.
Tne TEST LOAD Cie
ATTENUATOR
R
LINE IN ouTPUT
Fig. 3-2 Basic connection é Fig. 3-3 Connection for PHONES check
3-3. PLAYBACK PERFORMANCE
Deck
settings:
MONITOR
sw.:
TAPE
YTT-1052:
For
9.5
cm/s
or
3-3/4
ips,
EE
MIC
controls
(L/R):
Minimum
level.
position
YTT-1053:
For
19
cm/s
or
7-3/4
ips,
EE
LINE
controls
(L/R):
Specified
position
(step
1-3)
For
recording
alignment
(blank)
OUTPUT
controls
(L/R):
Specified
position
(step
1-2)
YTT-8013:
For
LH
(1,
1D
YTT-8053: For EE
TEAC test tapes: For playback alignment
YTT-1002: For 9.5 cm/s or 3-3/4 ips, LH (1,11) NOTE: TAPE SELECTOR (left) switch has no effect on playback mode.
YTT-1003: For 19 cm/s or 7-3/4 ips, LH (1, 1)
| MODE/ SIGNAL ADJUST
CONNECTION
INSTRUCTION
SOURCE
(or
CHECK)
ontrMy
REMABKS
5.
Playback
S
eee
Dna
Ei
hs
YTT-1003
Azimuth
adjust
|
Phase:
within
45°
head
5-1|
Fig.
34
TAPE
SELECTOR
(16
kHz/—10
screw
on
head
on
oscilloscope
azimuth
(R):
LH
(1,1
dB)
(Fig.
2-11)
(Fig.
3-5)
Fwo
=|
YTT-1003
R111/R211
—5
dB
(436
mV)
eee iat (400 Hz/0 dB)
6. Playback :
Hest TAPE SELECT.
(R): LH (L,I |REV a Check —5 dB +2 0B
(346 mV to 548 mV)
ia
OSCILLOSCOPE
OSCILLATOR O° (IN PHASE) 45° 30° 180
T1493
Fig. 3-4 Connection for azimuth check Fig. 3-5 Confirming phase relationship

X-3R
eM CONNECTION iNerRUcTION SOURCE (or CHECK) oye REmPnKS |
7-1|
Fig.
3-2
ales
YTT-1003
R116/R216
|
Fig.
36
9. TAPE SELECT. 9.
(R):
LH
(1,1D
+
7-2
me
YTT-1002
R120/R220
73
Changing
play
mode
to
REV
direction,
check
whether
the
frequency
response
specs
are
met
according
to
7-1
and
7-2.
7. Frequency
response FWD
74 TAPE SELECT, YTT-1053 R114/R214 Fig. 3-46
75
:
inne
YTT-1052
R118/R218
Fig.
3-7
16
Changing
play
mode
to
REV
direction,
check
whether
the
frequency
response
specs
are
met
according
to
7-4
and
7-5.
@ Ratio of spec,
FWD
and
REV
ti
OUTPUT
signal
HIGH
and
LOW
-
I)
f-8:dP)
to
10
8.
Signal-to-
|
8-1]
Fig.
3-2
LH
(1,
ID
and
EE
YTT-8013
Check
Hes
49
dB
herent
noise
level
noise
‘
and
LOW:
47
dB
@
Change-over
of
Use fully-erased YTT-8053 EE AC tine plug
tape
(Use
bulk
ae
51
dB
polarity,
The
worse
tape eraser) LOW: 49 dB reading should be
within specifica-
tion.
3-4 RECORDING PERFORMANCE
Deck settings: MONITOR sw.: TAPE TEAC test tapes: For recording alignment (blank)
MIC controls (L/R): Minimum level position YTT-8013: For LHII
LINE controls (L/R): Specified position (step 1-3) YTT-8053: For EE
OUTPUT controls (L/R): Specified position (step 1-2)
ADJUST
(or CHECK)
SIGNAL
SOURCE
MODE/
INSTRUCTION
REMARKS
CONNECTION
OUTPUT
AC voltmeter be-
tween terminals
#77 and #79 on
R & P AMPL PCB
Min, reading on AC
voltmeter
Min, reading
- L101/L201 [—40 dB or more
(7.75 mV or less)]
Rec-pause mode - L106/L206
9. Bias trap
Fig. 3-2
2
Test
tape:
YTT-8013
7
kHz/—32
dB
Azimuth
adjust
|
Maximum
output
10-1)
Fig.
3-2
SPEED
ow:
OW
(19.5
mV)
screw
of
head
level
10.
Record
Bias/EQ:
LH
IT
.
bias
il
(LH
TI)
Over
bias
value
10-2|
Fig.
3-2
me
i
C141/C241
2dB~4dB
He
(from
peak)
11.
Record
A
Test
tape:
YTT-8013
400
Hz/—12
dB
level
11-1)
Fig.
3-2
SPEED
sw.:
HIGH
(195
mV)
R158/R258
—5
dB
(436
mv)
(LHID
Bias/EQ:
LH
IL
-——|.
Required signal/
—22dB (61.5mvV) | 102/L202
Fig. 3-8
Fig. 3-9 |
When Bias/EQ are changed from LH IT
to LH |, output level should be raised
by +3 dB at 10 kHz.
12-1
Fig. 3-2 | YTT-8013
12. Frequency, Bias/EQ: LH IL
response | 12-2
(LH 1,
LH ID)
SPEED sw.: LOW
12-3 aS Bias/EQ: LH |
Required signal/
—32dB (19,5 mv)| /104/L.204
10 kHz/—32 dB
(i9.5mv) [Check
7 kHz and 400
Hz/—32 dB C142/C242
(19.5 mV)
Nearly equal
output level at
both frequencies
Test tape: YTT-8053
13-1] Fig. 3-2 SPEED sw.: LOW
Bias/EQ: EE
1 Test tape: YTT-8053
14-1] Fig. 3-2 SPEED sw.: HIGH
Bias/EQ: EE
400 Hz/—12
dB R159/R259 —5 dB (436 mV)
(195 mV)