Sony TC-158SD User manual

SPECIFICATIONS
Power Requirements: AC 120V 60Hz (US, Canadian model)
AC 110, 120, 220 or 240V—50/60 Hz
(AEP, E model)
DC 6V
four batteries of size D (IEC designation
R20)
Sony Rechargeable Battery Pack BP-8H
(optional)
US Model
Canadian Model
AEP Mode!
E. Model
STEREO CASSETTE-CORDER
Fast Forward and
Rewind Time: Approx. 90 sec. (C-60, at 6V)
Recording System: 4-track 2-channel stereo
Speaker: 10cm (4 inches) dia.
Power Output: 700 mw
Bias Frequency: 105 kHz
12V
car
battery
with
Sony
Car
Battery
Signal-to-noise
Ratio:
DOLBY
NR
OFF
Cord DCC-129 (optional)
Power Consumption: 12W
Dimensions: Approx. 350 (w) x 100 (h) x 240 (d} mm
133/4 (w) x 4 (h) x 93/g (d) inches
including projecting parts and controls
Weight: Approx. 4.8kg, 10 lb 9 0z with batteries
*‘Dolby’ and the double-D symbol are the trade marks of
Dalby Laboratory Inc. Noise reduction system manufac-
tured under license from Doiby Laboratory Inc.
“0dB =0.775V
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING ON THE
SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE.
CRITICAL TO SAFE OPERATION. REPLACE THESE:
COMPONENTS WITH SONY PARTS WHOSE PART
NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
With Ferri-Chrome Cassette
59 dB at peak level (NAB)
57 dB (DIN, 1975 rev.)
49 dB (DIN, old)
With chromium dioxide cassette
55 dB at peak level (NAB)
DOLBY NR ON
Improved
by
5dB
at
1kHz,
10dB
above
SkHz
Total Harmonic
Distortion: 1.3%
* Contistued on — 2-
>
CUATION
OF
VOLTAGE
SELECTOR
SETTING
“When
changing
a
voltage
of
the
voltage
selector,
be
“sure
to
c
the
ac
power
cord.
a
i) 5O
SERVICE MANUAL

Cetin
TC:158SD
Frequency Response: DOLBY NR OFF Record/playback
With Ferri-Chrome Cassette and Connector: Input impedance fess than 10k ohms
chromium dioxide cassette (AEP, E model) Output impedance less than 10k ohms
20—16,000 Hz (NAB)
30—15,000 Hz +3dB (NAB)
30— 15,000 Hz (DIN)
With regular cassette
20—14,000 Hz (NAB)
30— 12,000 Hz (DIN)
Wow and Flutter: 0.08% WRMS (NAB)
+0.2% (DIN)
Inputs: MIC (phone jack) .............. 2
sensitivity 0.2 mV (~72 dB)
for a low-impedance microphone
LINE IN (phono jack) ......-... 2
sensitivity 0.06V (~22 dB)
input impedance 100k ohms
Battery Life: Continuous recording time
Approx. 4.5 hours with Sony Long-life
Batteries size D
Approx. 10 hours with Eveready
Alkaline Batteries No. E95
Outputs: LINE OUT (phono jack) ........ 2
output level 0.435V (-5 dB)
at load impedance 100k ohms
suitable load impedance more than
10k ohms
HEADPHONES ............-45 1
a suitable load impedance
8—32 ohms
MODEL IDENTIFICATION
— Specification Label —
US model Canadian model
SONY.
SONY.
TAPECORDER TC-158SD | a
AC 120V 60Hz l2W DC 6V FLASH- TAPECORDER TC - (158SD
LIGHT BATT SIZE “D’X4 OR EQUIVALENT AC 120V 60Hz I2W DC 6V FLASH-
NO.
|
LIGHT
BATT
SIZE
“Dx4
OR
EQUIVALENT
MADE IN JAPAN
3+ 549 - 157-00
MADE IN JAPAN
3- 549 - 158-00
>SEP, E model
SONTY.
TAPECORDER TC-158 30
AC 110,120, 220,240V ~ 50/60Hz I2w
DC 6V == FLASHLIGHT BATTERY
(SIZE “D’)x4 OR EQUIV.
NO. . X
MADE IN JAPAN y
3- 549-160 -00 . ’

TC-1585
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TC-158SD |
Cassette Lid Removal (1), @)
and Replacement (@, @)
REC/PB
connector
(AEP model]
SECTION 2
DISASSEMBLY
Lower Case Removal
(1) 82.6x8 (black)
@) lower case
2.6x8 (black)
~~ a
‘ ee, =
3 —
Control Panel Removal
3) Press the PAUSE button.
PEAK level
indicator
O a ;
@) control panel Sep B2.6x8 (black)
REC LEVEL knobs
Note: When replacing the control panel, take care
of the PEAK level indicator position.

| TC-1588
Recorder Mechanism Lifting
Upper Case Removal
@ B3x8 {black}
QD) battery lid
Fal @) P26x8 (black)
@) K26x10
(lower screw only}
K2.6x10
(lower screw only}

- TC-158SD

fy
| TC-158
SECTION 3
ADJUSTMENTS
FREES
ON
Pause
Timing
Adjustment
Clean the following parts with a denatured-
alcohol-moistened swab:
— Playback mode —
1. The take-up reel spindle flange should touch
record/playback head pinch roller the tension pulley.
erase head rubber belts
capstan
idlers
2.
Slowly
press
PAUSE
button.
First,
the
pinch
roller should release from the capstan. Next,
the tension pulley should release from the take-
up reel spindle flange. Under this condition,
Do
not
use
a
magnetized
screwdriver
for
the
adjust
the
position
of
the
pinch
roller
by
adjustments. bending the specified parts.
Demagnetize the record/playback head with a
head demagnetizer.
After the adjustments, apply a suitable locking
compound to the parts adjusted.
capstan
The adjustments should be performed with the
rated power supply voltage unless otherwise
noted, | pinch roller
Adjust by bending here.
Head Height Adjustment
— Playback mode —
1.
Make
an
adjustment
cassette
as
shown
below.
Cut out hatched
tape cassette Portions... ~
In
playback
mode
and
viewing
from
the
top,
adjust
the
head
heights
to
eliminate
tape
curl
and tape twist at arrowed portions.
RO
erase head fecora play berk
are CO
=| />
3-§13-237-01 (t=0.1)
3-513-237-1171 (t= 0.2)
Shim, head height adjustment

- TC-158SD |
Muting Switch ($13) Position Adjustment
— Stop mode —
Loosen the adjustment screw and adjust the
switch position so that the gap of the switch
contacts becomes 1.5 0.2mm.
1.540.2mm — muting switch ($13)
contact
record lock plate
Timing Switch (S3) Position Adjustment
— Stop mode —
Loosen the adjustment screws and adjust the
position of the timing switch circuit board in
the arrowed direction so that the muting lever
just starts to pull the slide of the switch.
timing switch
circuit board
muting lever Motor Switch (S12) Position Adjustment
— Stop mode —
Loosen the adjustment screw and adjust the
switch position as shown below.
Pinch Roller Pressure Measurement
brake release
— Playback mode —
1. Pull the spring scale. —
2. Slowly return the pinch roller and read the
spring scale just when the pinch roller starts to
rotate.
5+0.2mm
270-3709 i
19.5—13 oz)| Pring scale

Flywheel Thrust Play Adjustment
— Playback mode —
1.
Carefully turn the thrust screw clockwise for
no lengthwise play of the capstan shaft.
2. Turn the thrust screw counterclockwise 1/5 to
3/s turns so that the lengthwise thrust play
becomes 0.1—0.3 mm.
thrust screw
TC-1588
Reference Data:
Forward Torque
30-60 g.cm
COLOLA (0.42—-0.83 oz.inch)
Deviation: less than 10 g.cm (0.14 oz.inch)
Back Tension Torque
2-4 g.cm
CQ102A (0.028—0.055 oz.inch)
Fast Forward and Rewind Torque
55-95 g.cm
CQ-201A
(0.77~1.32
02.inch)

T¢-158SD |
3-2. ELECTRICAL ADJUSTMENTS
Note: The adjustments should be performed in
the order given in this service manual.
The adjustments should be performed
for both L-CH and R-CH.
Switches and control should be set as follows
unless otherwise specified.
LIMITER switch: OFF
DOLBY NR switch: OFF
TAPE SELECT EQ switch: NORMAL
TAPE SELECT BIAS switch: NORMAL
MONITOR LEVEL control: MAX
BIAS and EQ switch settings in accordance with
tape used are as follows.
[Bion pe | caswiteh [BIAS wich
CS-10 NORMAL NORMAL
10,
Standard Record:
Set the REC LEVEL control for the specified
output level.
af osc
@) attenuator 10kQ
fe)
otf. _o
olt,O00
[
VTVM
LINE IN
400 Hz, 0.28V (-10 08}
Standard Input Level
[Frenne rates | apa et
Standard Output Level
a tance [Gute
Tape Speed Adjustment
Procedure:
Mode: playback
speed checker
FM-30
or
digital frequency
ieeh vane counter
WS-4
(3 kHz, OdB)
ble
LINE OUT
Specification:
Frequency at beginning and end of tape should
be within; :
Adjustment Location:
servo amp board