Sony DTC-670 Service Manual

SERVIGE
MANUAL
AEP Model
Tape
Recording head
Recording
time
Tape
speed
Drum
rotation
Error
correction
Tape
Track
pitch
Sampling
frequency
Modulation
system
Transfer rate
hlumber
of channel
SPECIRCATIONS
Digital
audio
tape
Rotary
head
Standard:
120
minutes.
Long-play
mode: 240 minutes
(with
DT-120)
Standard:8.15 mm/s,
Long
play
mode:
4.075 mm/s
Standard:
2,000
rpm,
Long-play mode:
1,000 rpm
Double
Read Solomon code
13.6
Fm
(20.a pm)
48 kHz, 44.1
kHz,32kHz
8-10
Modulation
2.46
MbiVsec.
2 channels,
stereo
Model
Name Usinq
Similar
Mechanism
DTC-57ES
Taoe
Transoort Mechanism
Tvpe DATM-1OO
Wow
and
flutter
Input
Oulpul
-continued
on
ne)ct
page
-
DIGITAT
AUDI(I
TAPE
DECK
D/A
conversion
(Ouantization)
Standard: 16-bit linear
Long-play mode: 12-bit
non-linear
Frequency response
Standard:
2-22,000
Hz
(10.5
dB)
Long-play mode:
2-14,500
Hz
(r0.s
dB)
Signal to
noise ratio
Standard: more
than 90 dB
Long-play mode: more
than 90
dB
Dynamic
range
Standard:
more than
9O
dB
Long-play mode: more than
90
dB
Total
harmonic
distortion Standard: less
than
0.005"Â
(1
kHz)
Long-play mode: less
than
o.@%
(1
kHz)
Below measurable limit
(10.001%
w. PEAK)
Jack
type
lmpedance
Rated input
level
LINE IN
phono
iack
47 kohms
-4
dBs
DIGITAL
IN
phono
jack
75
ohms
0.5
Vp-p,
20"/o
DIGTTAL
IN
optical
iack
Jack
type
lmpedance
Rated
outpùl
Load
impedance
LINE OUT
phono
lack
470 ohms
-4
dBs
More than
10
kohms
PHONES
stereo
phone
jack
220
ohms
1.3
mW
32 ohms
DIGITAL OUT
(optical
jack):
wavelength 660
nm
SONY

Sony DTC-670 Specifications

General

Sampling Frequency	48 kHz, 44.1 kHz, 32 kHz
Quantization	16-bit linear
Type	Digital Audio Tape (DAT) Recorder
Recording Format	DAT
Tape Speed	8.15 mm/s
Recording Time	120 minutes (with 120-minute tape)
Frequency Response	2 Hz to 22 kHz (±0.5 dB)
Signal-to-Noise Ratio	> 92 dB
Dynamic Range	> 92 dB
Analog Inputs	1 x Stereo RCA
Analog Outputs	1 x Stereo RCA
Digital Inputs	Coaxial x 1, Optical x 1
Digital Outputs	Coaxial x 1, Optical x 1
Total Harmonic Distortion	0.005%

Summary

Safety and Precautions

Safety Related Component Warning

Warns about components critical to safe operation.

Power-Off Repair Precautions

Advises on safety measures when working with the unit powered OFF.

Identifing Parts and Controls

Front Panel and Remote Controls

Identifies and describes front panel and remote commander controls.

SECTION 3 ADJUSTMENTS

Adjustment Procedures and Precautions

Covers test tapes, settings, cleaning, tape path, and test modes.

1. ELECTRICAL ADJUSTMENTS

Sensor, Torque, and Back Tension Checks

Procedures for checking sensor, VD torque, and VD back tension.

DPG and ATF Pilot Adjustments

Procedures for DPG adjustment and ATF Pilot (GCA) check.

SECTION 5 EXPLODED VIEWS

Exploded Views of Unit Sections