Text preview for : Teac-D70 da conv.pdf part of Teac D70 d/a converter
Back to : Teac-D70 da conv.pdf | Home
SERVICE MANUAL
D-70
Multi D/A Converter
CONTENTS
1 SPECIFICATIONS 2
2 ADJUSTMENTS AND CHECKS 3
3 EXPLODED VIEWS AND PARTS LIST 5
4 PC BOARDS AND PARTS LIST 9
5 INCLUDED ACCESSORIES 17
NOTES
PC boards shown are viewed from parts side.
Parts marked with * require longer delivery time.
The parts with no reference number or no parts number in the
exploded views are not supplied.
As regards the resistors and capacitors, refer to the circuit diagrams
contained in this manual.
£ Parts marked with this sign are safety critical components. They
must be replaced with identical components - refer to the appropriate
parts list and ensure exact replacement.
Parts of [ ] mark can be used only with the version designated.
Effective : October, 2002 S-0077A
1 SPECIFICATIONS
Electrical characteristics (at 24bit/44.1kHz input) General
Frequency response ........................................20Hz-20kHz ±0.3dB Power supply ................................AC 230V, 50Hz (Europe model)
S/N ratio ..............................................................................116dB AC 120V, 60Hz (U.S.A./Canada model)
Dynamic range......................................................................108dB AC 220V, 60Hz (Korea model)
THD ..................................................................................0.0025% Power consumption ..............................................................26W
Channel separation ..............................................................115dB Dimensions (WxHxD) ..................................465 x 162 x 369 (mm)
Weight..........................................................................about 25 kg
Valid sampling frequencies (kHz)
32, 44.1, 48, 88.2, 96, 176.4, 192 (each ±1%)
Sampling frequencies (kHz) corresponding to de-emphasis Remote control unit
32, 44.1, 48 Type..............................................................Infrared pulse system
Battery ..........................................DC3V (AA batteries, SUM-3 x 2)
Dimensions (WxHxD) ....................................57 x 21 x 216 (mm)
Input levels Weight..........................................about 320g (including batteries)
TOS x 3 ........................24 to 14.5dBm peak ( :700nm typical)
SPDIF x 3 ........................................................0.5 Vp-p±0.1V/75
XLR x 2 ..........................................................5.0Vp-p±0.1V/110 Accessories
Power cord x 1
Remote Control Unit x 1
Output levels Batteries (AA, SUM-3) x 2
Analog outputs Felt x 3
RCA x 1 system............................................2.20Vrms±0.1V/47k Warranty card x 1
XLR x 1 system............................................2.20Vrms±0.1V/600 Owner's manual x 1
Digital output
TOS x 1............................................................-21 to -15dBm peak Improvements may result in specification or feature changes
without notice.
WORD SYNC output
BNC x 2 ..........................................................................TTL / 75
369mm
465mm
331mm
162mm
2
2 ADJUSTMENTS AND CHECKS
2-1 Test Mode 2-2 Audio System
2-1-1 Getting into Test Mode Setting
While holding down the INPUT SELECTOR and buttons, CLOCK MODE: PLL
power on the unit and hit the DIGITAL FILTER button repeatedly. AES3 INPUT: SINGLE
DIGITAL FILTER: FIR
DIGITAL IN: Fs=44.1kHz, FullBit
2-1-2 Version Display If you intend to use a digital output of the P-70 or others for
connection to the digital input, use a digital signal that is not
When the test mode is activated, the microcomputer version
upconverted.
information, "uComVer X.XX", is displayed. Then, at each
press of the INPUT SELECTOR button, the RDOT version
information, " RDOTver XXXX ", and the RAM version
2-2-1 DC Offset Adjustment
information, "RAMversionXX", are displayed in sequence.
1. Set the OUTPUT SELECT switch on the rear panel to "XLR".
2. Apply a digital signal to the DIGITAL IN and check to see that
2-1-3 FL Grid Check the input indicator turns on and that a sampling frequency
shows in the display. (Check of the lock status.)
After displaying a series of version information, pressing the
3. Turn the OUTPUT LEVEL control counterclockwise, so that the
INPUT SELECTOR button activates the grid check mode and
output level is (as shown by "___._" in the display).
the display reads "GridChecking". Turn the OUTPUT LEVEL
4. Measure the DC offset voltage between pins 2 (+) and 3 () of
control to check to see that the grids turn off one after another.
LINE OUT (XLR). Adjust VR303 (L) and VR403 (R) on ANALOG
Continue to turn the OUTPUT LEVEL control to check to see that
PCB for 5mV.
the grids turn on one after another.
XLR pin assignments
2-1-4 FL Segment Check
When the FL grid check is done with, press the INPUT SELECTOR
button to activate the segment check mode. Turn the OUTPUT
LEVEL control to check to see that the dot matrix turns on by dot.
2-1-5 LED Check
VR403 VR303
When the FL segment check is done with, press the INPUT
SELECTOR button to activate the LED check mode. The display
reads "LEDCHECK RDT". Turn the OUTPUT LEVEL control to
check to see that each LED turns on.
2-1-6 Resetting EEPROM
When the LED check is done with, press the INPUT SELECTOR
button and "! EEPRESET !" is displayed. Press the DIGITAL
FILTER button and the display changes to read "EEPSAVE
OK" and the ROM is reset.
ANALOG PCB
3
2-2-2 Output level check
1. Connect the AC voltmeter to the LINE OUT.
2. Play the track 2 (1kHz, 0dB) of the MCD-111, and check the
output level.
Specifications: 2.2 0.2Vrms (100k load, RCA)
4.4 0.2Vrms (100k load, XLR)
2-2-3 Distortion check
1. Connect the distortion meter to the LINE OUT.
2. Play the track 2 (1kHz, 0dB) of the MCD-111, and check the
distortion.
Specification: 0.005% or less (400Hz HPF 20kHz LPF)
2-2-4 Frequency response check
1. Play the track 3-6 (20Hz 20kHz, 0dB) of the MCD-111, and
check that output level are within the specified values with
respect to the 1kHz reference level.
Specifications: 20Hz 20kHz, 0 1dB (FIR mode)
20Hz 20kHz, 0 1dB (CUSTOM mode)
20kHz, 3 1dB (RDOT mode)
The DIGITAL FILTER button cycles through the following
modes:
2-2-5 S/N check
1. Play the track 7 (non-signal) of the MCD-111, and check that
noise level are within the specified values with respect to the
1kHz reference level.
Specification: 100dB or more (IEC-A)
2-2-6 Channel separation check
1. Play the track 8 (L:1kHz / R:non-signal) of the MCD-111, and
check the leakage from Lch to Rch.
2. In the same way, play the track 10 (R:1kHz / L:non-signal) of
the MCD-111, and check the leakage from Rch to Lch.
Specification: 100dB or more (IEC-A)
4
3 EXPLODED VIEWS AND PARTS LIST
EXPLODED VIEW-1
!
1
2 !
2
c
@ @
3
6
@
6
4
7
8 # 9
#
$
0 %
w # 3
5 @
e q
q #
w t *
% ^
r q d
u s
y *
i & z
(
o s
x
p a f
%
Q
# ^
k h g Q
#
#
l
v
j Q Q
b
$ 7
)
8
;
(
5
EXPLODED VIEW-1
6
EXPLODED VIEW-2
! @
# $
3 %
& !
1
& $
6 4! ^
*
8
w $ 5
7
q
e 0
t 9 (
r &
* y
&
& u
* &
s
2 *
i
g
*
d f a
h
*
* o
* p
&
j
*
x
k
* * l
)
z *
2
k
*
&
* *
;
* s
v *
c
&
&
7
EXPLODED VIEW-2
£
£
£
£
8
4 PC BOARDS AND PARTS LIST
DIGITAL PCB
This PCB is a four-layered board.
9
ANALOG PCB
This PCB is a four-layered board.
10
FRONT PCB
TOGGLED PCB WORD PCB BAL SW PCB
11
PWR ANA PCB PWSW PCB
PWR DIGI PCB
INLET PCB
12
DIGITAL PCB ASSY DIGITAL PCB ASSY
ANALOG PCB ASSY
£
£
13
ANALOG PCB ASSY ANALOG PCB ASSY
£
14
FRONT PCB ASSY Part of GATHER PCB A ASSY BAL SW PCB ASSY Part of GATHER PCB A ASSY
PWR DIGI PCB ASSY Part of GATHER PCB B ASSY
£
£
£
£
TOGGLED PCB ASSY Part of GATHER PCB A ASSY
£
£
£
£
£
WORD PCB ASSY Part of GATHER PCB A ASSY £
£
£
£
15
PWR ANA PCB ASSY Part of GATHER PCB B ASSY
£
£
£
£
£
£
£
£
£
£
£
PWSW PCB ASSY Part of GATHER PCB B ASSY
£
£
£
INLET PCB ASSY Part of GATHER PCB B ASSY
£
16
5 INCLUDED ACCESSORIES
INCLUDED ACCESSORIES
£
£
17
SCHEMATIC DIAGRAM D-70 DIGITAL PCB (1/2)
1 2 3 4 5 6 7 8
P106
+5VD VCC +5VD 1
P101
1
+5VD
PCB,DIGITAL (1/2) R155 2 1 47K R239 1 2 47 RSVBCK 2
2 E901335-00C R156 2 1 47K R240 1 2 47 RSVLRCK 3
from PCB,PWR DIGI
3 R157 2 1 47K R241 1 2 47 RSVDATA 4
1
4 C162 R173 5
1
1000U/16V
13
1 2
1
6
EH-4 C163 U116D 47K
2
2 3 R172
1000U/16V 1 2 SI1 11 12 74VHC125 SI1_EXT 7
to PCB,RESERVE
+3.3V +2.5V U116A U115A R242 1 2 22 SO_EXT
2
P108 47K 8
A 3
U111
2 3
U112
2
1
2
+7VPLL
74VHC125 74VHCT08
1
3
SCK_EXT 9
IN OUT +3.3V IN OUT +2.5V CS0_EXT
C240 2 10
ADJ
2
1
ADJ
2
4
EH-2 100U/16V +5VD
1
R129 R128 R174 U115B CS1_EXT 11
120 C108 120 C243 5 6 1 2 4 74VHCT08
C105 NJM317 C131 0.1 NJM317 47U/16V
1
1
6 12
0.1 47U/16V +5VD
1
2
1
47K 5
U116B C164 0.1 RSV_EXT
2
13
74VHC125 2 1
2
2
2
+5VD +5VD C101
R140 R154 R134 C140 1 2 PH13P
2.2K 120
20
220 1 2
CS_DIR4 0.1
CS_DIR3 SCK1 R169 2 22
1
1
1
10
2 18 1
VCC
0.1 CS_DIR3 A1 Y1 R168
3 A2 Y2 17 1 2 22
CS_DIR4 4 16 R167 1 2 22
RESET A3 Y3 R166
9 8 RESET 5 A4 Y4 15 1 2 22
DIN_EN7 6 14 R165 1 2 22
A5 Y5
2
RESET 7 13
R333 U116C A6 Y6
8 A7 Y7 12
47K 74VHC125 DIN_EN[1..7] 9 11 +3.3V
A8 Y8 C155 0.1
+5VD +5VD SI1
1
1 2 1
GND
CS_DIR1 G1
19 G2
+5VD U104
16
U114 GND U106