Sony tc 229 sd service manual

Page 1

SPECIFICATIONS

Power Requirements: 110, 120, 220, 240V, 50/60 Hz
Power Consumption: 35W

Dimensions: Approx: 430 (w) x 17001) x 310 (d) mm
17 (w) x 6%(h) x 1272 (:1) inches

including projecting parts and controls
Weight: Approx. 10.5 kg, 23 lb 3 oz
Track: 4-track 2-channel stereo
Fast Forward

Rewind Time: Approx 70 seconds with Sonv cassette

C-GO
Frequency Response: DOLEY NR OFF

With Perri-Chrome cassette
20-18,000 Hz (NAB)
SCI-16,000 Hz :3 dB (NAB)
30-46900 Hz (DIN)

With chromium dioxide cassette
20-17,000 Hz (NAB)
30-15,000 Hz iSdB (NAB)
CEO-15,000 H; (DIN)

With regular cassette
20~15,000Hz (NAB)
30-13,000Hz (DIN)

Wow and Flutter: 0.06% WRMS (NAB) _ '>
1041296 (DIN)

SAFETY-RELATED COMPONENT WAR NI NGI!

COMPONENTS IDENTIFIED BY SHADING ON THE
SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE
CRITICAL T0 SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART
NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.

S/N Ratio: DOLBY NR OFF
With Ferri~Chrome cassette
GOdB at peak ieveI (NAB)
59 dB (DIN, 1975 rev)
51 dB (DIN, old)
With chromium dioxide cassette
56 dB at peak level (NAB)
DOLBY NR ON
Improved by 5:18 at 1 kHz, 10dB
above 5 kHz

Total Harmonic .
Distortion: ' 1.3%
Record Bias
Frequency: 105 kHz
Inputs: MIC (two phone jacks)
Sensitivity: 0.2 mV (-72 dB)
for (ow-impedance microphone
LINE IN (stereo binaural jack, two phone jacks)
Sensitivity: 0.06V (-22 dB)
Impedance: 100 kn
REC/PB (connector)
Input impedance: less than 10 kn

-- Continued on page 2 -

SONY
SERVICE MANUAL

Page 2

SECTION 3

ADJUSTMENTS

1. Clean the following parts with a denatured-alcohol-
moistened swab:

record/playback head pinch roller
erase head rubber belts
capstan idlers

2. Demagnetize the record/playback head with a head
demagnetizerr

3. Do not use a magnetized screwdriver for the
adjustments.

PR ECAUTION

4. After the adjustments, apply a suitable locking
compound to the parts adjusted.

5. The adjustments should be performed with the
rated power supply voltage unless otherwise noted.

3-1. MECHANICAL ADJUSTMENT

Record Solenoid Position Adjustment

Adjust the record solenoid position to obtain
the indicated clearance between plate spring and
record solenoid lever.

REC solenoid -'-"

0.5-7.0mm

,9 plate spring

REC solenoid lever
adiastmen 1 screws

Tape Path Adjustment
- playback mode -

1. Adjust erase head height by adding or
removing shim to eliminate tape curl at the
erase head.

2. Adjust record/playback head height adjust-
ment screw to eliminate tape curl at the
record/playback head.

erase head

record/playback head

Shim, Mada/119i brawlfiusrllnent.
t= . mm
357343771 lt-a2mml

Pulley Height Adjustment
- stop mode -

Adjust position of motor and TU pulleys to
obtain indicated clearances between motor and
chassis.

drive belt
-. flywheel
motor pulley
chassis Ora-107"
adjustment screw Tu pulley

Pinch Roller Pressure Adjustment
-- 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.

3. if necessary, change the hooking position.

capstan

_ parallel

A

79%

capstan pinch roller

-&-spring scale

320-4009
(113-14001)

., l rc-229so