Technics SU-V90D Service Manual

Digital Integrated Amplifier
OS 250464
SV MNL
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91004988 4
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SPECIFICATIONS coin 45 500)
@ MAIN AMP. SECTION
20 Hz~20 kHz continuous power output
both channels driven 2 X 100W (8Q)
1 kHz continuous power output
both channels driven 2X 150W (49)
2 X 115W (80)
Total harmonic distortion
rated power at 20 Hz~20 kHz 0.002% (89)
rated power at 1 kHz 0.0007% (89)
half power at 20 Hz~20 kHz 0.002% (89)
half power at 1 kHz 0.0007% (89)
Intermodutation distortion
rated power at 250 Hz: 8 kHz=4:1, 80 0.005%
rated power at 50 Hz: 7 kHz=4:1, SMPTE, 8Q
0.005%
Power bandwidth
both channels driven, —3 dB
5 Hz~60 KHz (8, 0.025%)
Residual hum and noise 0.8 mV
Damping factor 30 (49), 60 (82)
Headphones output level and impedance
700 mV/3300
Load impedance
MAIN or REMOTE 4N~16
MAIN and REMOTE 8N~160
@ PRE AMP. SECTION
Input sensitivity and impedance
PHONO MM 2.5 mV/47kQ
MC 170 xV/2200
TUNER, CD, AUX, TAPE 1, TAPE 2/DAT
150 mV/18kQ
POWER AMP DIRECT 1V/47kQ
Technics
PHONO maximum input voltage (1 kHz, RMS)
MM 160 mV
MC 12 mV
S/N
rated power (4Q)
PHONO MM 79 dB (88 dB, IHF, A)
MC 70 dB (72 dB, 250 uV, IHF. A)
TUNER, CD, AUX, TAPE 1, TAPE 2/DAT
100 dB (JHF, A: 106 dB)
POWER AMP DIRECT
106 dB (IHF, A: 115 dB)
—26 dB power (40)
PHONO MM 79 dB
MC 68 dB
TUNER, CD, AUX, TAPE 1, TAPE 2/DAT
86 dB
50 mW power (40)
PHONO MM 76 dB
MC 69 dB
TUNER, CD, AUX, TAPE 1, TAPE 2/DAT
80 dB
Frequency response
PHONO RIAA standard curve
+0.2 dB (20 Hz~20 kHz)
TUNER, CD, AUX, TAPE 1, TAPE 2/DAT
0.8 Hz~150 kHz (-3 dB)
+0, -0.1 dB (20 Hz~20 kHz)
POWER AMP DIRECT 0.8 Hz~150 kHz (—3 dB)
Tone controls
BASS 50 Hz, +10 dB~ —10 dB
TREBLE 20 kHz, +10 dB~—10 dB
Loudness control (volume at —30 dB)
50 Hz, +9 dB
PO. Box 288. Central Osaka Japan
Color
(K)z.cetses Black Type
Continental Europe.
Holland.
Belgium.
France.
United Kingdom.
[EG] ........... F.R.Germany.
Asia,Latin America,
Middle Near East,
Africa & Oceania.
East PX.
European Military.
Muting —20 dB
Output voltage and impedance
TAPE1, 2/DAT REC OUT 150 mV
Channel balance, AUX 250 Hz~6,300 Hz +1dB
Channel separation, AUX 1 kHz 55 dB
M@ DIGITAL SECTION
Harmonic distortion 0.002%
Total harmonic distortion 0.003%
S/N 110 dB
Dynamic range 99 dB
Frequency response
2 Hz~20 kHz, +0.3 dB. —0.3 dB
@ GENERAL
Power consumption 765W
Power supply
For continental Europe AC 50 Hz/60 Hz, 220V
For United Kingdom, Australia and others
AC 50 Hz/60 Hz, 110V/127V/220V/240V
Dimensions (WxH~D) 430 x 158 x 397 mm
(16-15/16" x 6-7/32" x 15-5/8")
Weight 13.2 kg (29.04 Ib.)
Notes:
1. Specifications are subject to change without
notice.
Weight and dimensions are approximate.
2. Total harmonic distortion is measured by the
digital spectrum analyzer (H.P. 3045 system).
Panasonic Tokyo Office
Matsushita Electric Trading Co., Ltd.
6th Floor, Worid Trade Center Bidg.,
No. 4-1, Hamamatsu-cho 2-Chome, Minato-ku,
Tokyo 105, Japan
ual
Amplifier
SU-V90D
m CONTENTS
Page
BEFORE REPAIR AND ADJUSTMENT ................- 2
PROTECTION CIRCUITRY
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LOCATION OF CONTROLS. 0.0... cc cecececeeeeeceneeeeene 3,4
CONNEGTIONS |... 5. sescbeveceeese aus Syaceaseseecteessusexsentes ods 5,6
DISASSEMBLY INSTRUCTIONS ............cceeeseteee 7~ 10
SCHEMATIC DIAGRAM .... cee cece cecseceeeseneteeneeeees 11 ~ 22
TERMINAL GUIDE OF
TRANSISTORS, DIODES AND IC'S ............000 22
Page
PRINTED CIRCUIT BOARDS .............cccecceeeeeeeerereneee 23 ~ 28
BLOCK DIAGRAM uo... ee eee ceee eee eee cece eneeee rece neneeeenaee 29,30
WIRING CONNECTION DIAGRAM .............cceeeeeeeeee 31,32
FUNCTION OF IC TERMINALS. ou... eeceeeeeeeaeeees 33,34
MEASUREMENTS AND ADJUSTMENTS ............... 35,36
EXPLODED VIEW ....sescscccsssstssessecenseteetee
REPLACEMENT PARTS LIST ......--eses00
RESISTORS AND CAPACITORS
m= BEFORE REPAIR AND ADJUSTMENT
(1) Turn off the power supply. Using a 100, 10W resistor, shortcircuit both ends of power supply capacitors
(C609,C610)in order to discharge the voltage.
(2) Before turning on the power switch of the unit.
A. Connect the voltage controller to the primary side.
of the secondary side.
C. Turn the VR of ICQ(VR401,VR402,VR551 and VR552)to minimum(counterclockwise).
D. After setting the output to zero of the voltage contoller,turn on the power switch of the unit.
And increase the output of voltage controller gradually.
Then, check carefully whether the current value of primary side become more than following value or
whether the DC voltage of secondary side is increasing slowly.
E. If the value of current is increasing unusually or the DC voltage is not increasing,lower the output
level of voltage contoller immediately.
@ The current value of the primary side at no signal. (Confirm the power supply voltage of each area and provided
voltage of the unit.)
The protection circuitry of the amplifier may have
operated if either of the following conditions is noticed:
@ No sound is heard when the power is turned on.
@ Sound stops during a performance.
The function of this circuitry is to prevent circuitry damage
if, for example, the positive and negative speaker
connection wires are "shorted" , or if speaker systems with
an impedance less than the indicated rated impedance
of the amplifier are used.
ACCESSORY
@ AC power SUPPLY COP... cece cece ceceseeneeeneaeaaaeneaees 1
For United Kingdom and some areas, the power cord is directly
attached to the unit.
Configuration of AC power supply cord differs according to
area.
Power supply voltage AC110V AC127V AC220V AC240V
Consumed current 50/60Hz 270 ~ 730mA 240 ~ 630mA 130 ~ 370mA 120 ~ 330mA
m PROTECTION CIRCUITRY
If this occurs, follow the procedure outlined below:
1.Turn off the power.
2.Determine the cause of the problem and correct it.
3.Turn on the power once again.
Note:
When the protection circuitry functions, the unit will not
operate unless the power is first turned off and then
on again.
SFDACO5E03
[E, EF, El, EB, EH, EG)
QFC1205M [EK]
SJA190 [XL]
SJA111 [XA]
RJAS2YA [PA, PE]