Panasonic su v 620 service manual

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ORDER NO, A09507169C8

' ervice Manual

Stereo Integrated Amplifier

Specifications (DIN 45 500)

20 Hz - 20 kHz continuous power output

both channels driven 2 x 70 W (8 $2)
1 kHz continuous power output
both channels driven (THD: 1%) 2x 80 W (8 9)
2 X 100 W (4 9)
63 Hz - 12.5 kHz continuous power output
both channels drlven (THD: 1%) 2x 75 w (8 £2)
2 x 95 W (4 Q)
Total harmonic distortion
rated power at 20 Hz - 20 kHz 0.1% (8 £2)

lntermodulation dlstortlon (50 Hz: 7 kHz = 4:1, SMPTE)

rated power 0.1% (8 9)
Residual hum and noise 1 mV
Damping tactor 100 (8 9)

so (4 r2)

Headphones output level/impedance
Load impedance

540 mV/47 (2 (fl 6.3)

A or B 4 Q - 16 St

A and B 8 £2 - 16 52
Input sensitivity/Impedance

PHONO MM 2.5 mV/47 k5:

TUNER, CD, AUX, TAPE 1, TAPE 2/DCC
Phono maximum input voltage (1 kHz, HMS)

150 mV/22 kSZ

MM 150 mV (IHF '66)
S/N (rated power, 4 £2)
PHONO MM 76 dB (77 dB, lHF Ice)

TUNER, CD, AUX, TAPE 1, TAPE 2/DCC 92 dB (95 dB, IHF 66)
S/N at - 26 dB power (4 :2)

Amplifier
Colour
(K) : Black
Areas
Suffix for Area Colour
Model No.
(E) Europe
(EB) Britain
(EG) Germany and [taly (K)
Asia, Latin America.
(GO) Middle East and Africa
(GN) Oceania
SIN at 50 mW (4 S2)
PHONO MM 68 dB
TUNER, CD, AUX, TAPE 1, TAPE2/DCC 63 dB
Frequency response
PHONO MM FllAA standard cuve :1 dB

(30 Hz - 15 kHz)
TUNER, CD, AUX, TAPE 1. TAPE 2/DCC
3 Hz- so kHz (+0. - 3 dB)
+0 dB, - 0.3 dB (20 HZ - 20 kHz)
Tone controls
BASS 50 Hz.+10dBto-10dB

TREBLE 20 kHz, +10 dB to - 10 dB
Output voltage

TAPE 1, TAPE 2/DCC REC OUT 150 mV
Channel balance (AUX 250 Hz -6.3 kHz) :1 dB
Channel separation (AUX 1 kHz) 50 dB
I GENERAL
Power consumption 190 W
Power supply

For (E) and (EG) areas so Hz/60 Hz AC, 230 v
For (EB), (GN) areas 50 Hz/60 Hz AC. 230 V - 240 V
For (66) area only 50 Hz/SO Hz AC, 110 V - 127 V / 220 V - 240 V
Dimensions (Wx Hx D) 430x 125x310 mm
Weight 6.8 kg

Notes:
1. Design and specifications are subject to change without notice.

PHONO MM 67 dB Weight and dimensions are approximate.
TUNER, CD, AUX, TAPE 1, TAPE 2/ncc 70 dB 2. Total harmonic distortion is measured by the digital spectrum
analyzer.
AWARNINc

This service information is designed for experienced repair technicians only and is not designed for use by the general public. it does not
contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.

Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or
repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

Technics®

© 1995 Matsushita Electric industrial Co.. Ltd.
All rights reserved. Unauthorized copying
and distribution is a violation of law.

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I Contents _

Page Page
Before Repair 2 Operation Check and
Protection Circuitry 2 Main Component Replacement Procedures
Accessories 2 Schematic Diagram ........................................
Caution for AC ead ......... 3 Printed Circuit Board Diagram ..
Connecting theAudio Components 4 Wiring Connection Diagram ..
Connecting the Speakers and Power Supply 5 Block Diagram................
Front Panel Controls 6 Function of IC Terminals
Listening to Sound 6. 7 Replacement Parts List.
Recording .............. 8 Cabinet Parts Location ..

Packaging ..................

I Before Repair

(1) Turn off the power supply. Using a 10 52, 10 W resistor, connect both ends of power supply capacitors (C703, C704, C705, 706) in
order to discharge the voltage.

(2) Before turning the power supply on, after completion of repair, slowly apply the primary voltage by using a power supply voltage
controller to make sure that the consumed current at 50 Hz in NO SIGNAL mode should be shown below with respect to supply
voltage 230 V/240 V/110V - 127 V/220V - 240V.

Power SUPPIY voltage AC 230 V AC 240 V AC 110V - 127 V AC 220V - 240V

Consumed current 50 Hz 70 ~ 220 mA 65 ~ 215 mA 130 ~ 410 mA 65 ~ 215 mA

I Protection Circuitry

The protection circuitry may have operated if either of the following conditions is noticed:

O No sound is heard when the power is switched ON.

0 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 this unit are used.

it this occurs, follow the procedure outlined below:

1. Switch OFF the power.

2. Determine the cause of the cause of the problem and correct it.

3. Switch ON the power once again.

Note:
When the protection circuitry functions, the unit will not operate unless the power is first switched OFF and then 0N again.

I Accessories

0 AC power supply cord
(E. EG, GC) areas : (RJAOO19-2K) ...... 1 (EB) area : (VJAO733) ........................... 1 (GN) area: (RJAooae-K) ...................... 1

O Remote control transmitter 0 Batteries 0 Power plug adaptor [for (GO) area only]
(FlAK-SU129WH) 1 (UM-4. "AAA", R03) ................................... 2 (SJP5213-2) ............................................ 1
Note: These are available on sales route.