Technics SUV 500 M 2 Service Manual

Page 1

AD01 04090C2

Service Manual

Stereo Integrated Amplifier

SU-V500M2

Colour
(K) ........... Black Type

Specifications

MAIN AMP section
Power output [at power supply 240 V for (EB) area]:
20 Hz - 20 kHz continuous power output

both channels driven; 2 x 30 W (8 Q)
1 kHz continuous power output
both channels driven (THD: 1 %): 2 x 38 W (8 n)

2 x so w (4 o)
63 Hz - 12.5 kHz continuous power output

both channels driven (THD: 1 %): 2 x 35 W (8 Q)
2 x45 w (4 Q)

Total harmonic distortion:
rated power at 20 Hz - 20 kHz: 0.2 % (8 £2)

Intermoduration distortion (50 Hz: 7 kHz = 4 : t, SMPTE):

rated power; 0.2 % (8 (2)
Residual hum and noise: 1 mV
Damping factor: 60 (8 Q)

30 (4 n)
Headphones output levellimpedanoe: 340 mV/47 9
Load Impedance:

A or B; 4 Q - 16 Q

A and B; 8 fl 7 16 Q
PRE AMP section
Input sensitivityfimpedance:

PHONO MM; 25 mV/47 kQ

TUNER, CD, AUX, TAPE1, TAPEZ; 150 mV/22 k0
Input capacitance: 270 pF

PHONO maximum input voltage (1 kHz, RMS):

SIN at -26 as power (4 Q):

PHONO MM; 67 dB
TUNER, co, Aux, TAPE1, TAPE2; 70 dB
sm at so mw (4 o):
PHONO MM; 63 dB
TUNER, co, AUX, TAPE1, TAPEZ; 63 dB

Frequency response:
PHONO MM; RIAA standard curve :1 dB (30 Hz - 15 kHz)
TUNER, co, AUX, TAPE1, TAPEZ;
+0, es dB (3 Hz , 60 kHz)
+0, -o.s dB (20 Hz - 20 kHz)

Tone controls:

BASS; 50 Hz, +10 dB to -10 dB

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

TAPE1, TAPE2 REC OUT; 150 mV
Channel balance (AUX 250 Hz - 6.3 kHz): :1 dB
Channel separation (AUX 1 kHz): 50 dB
General
Power supply:

For (E) and (EG) areas; AC 230V, 50/60 Hz

For (EB) area; AC 230 - 240 V. 50/60 Hz
Power consumption: 130 W
Dimensions (W x H x D): 430x 125x310 mm
Weight: 6.0 kg

MM' 150 mV (IHF '66) Notes: Specifications are subject to change without notice.
SIN (flamed power 4 Q): Weight and dimensions are approximate.
FHONO MM; 76 dB (77 dB, IHF '66) Total harmonic distortion is measured by the digital spectrum
TUNER, CD, AUX, TAPE1, TAPEZ; 90 dB (95 dB, IHF '66) analyzer.
A WARNING

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®

© 2001 Matsushita Electric Industrial Co., Ltd, All
rights reserved. Unauthorized copying and
distribution is a violation of law.

Page 2

CONTENTS

1 Note
2 Before Repairs"-
3 Protection Circuitry
4 Ac
5 Caution for AC Mains Lea
6 Location ot Controls -
1 Operation Checks and Component Replacement Proceduress

7.1. Checking for the operation P.C.B. and tone amp P.C.B. "6

7.2. Checking for the main P.C.B. -'7

7.3. Replacement for the power IO" -'7
8 Type Illustration of le, Transistors and Diodes -------------------- 9

lies " "' """""""""

1 Note

~The contents changed from Model No. SU-V500M2
(Order No. AD990203002)

This model [SU-V500M2 (Order No. AD010409002)] is
changed from Model No. SU-V500M2 (Order No.
AD990203OC2) about Printed Circuit Board. So you need to
use the service manual properly with distinguishing the unit
is sold on and after April 2001 or not.

When the unit is repaired, refer to the table as shown below
and confirm IC601 and Part No. of operation P.C.B.

SU-V500M2 SU-V500M2
(AD990203002) (AD010409062)
|0601 RSN3502A RSN3502C
Operation P.C.B. RJB1273AB-3 RJB1273AB-4
The time of sales Before April 2001 On and after April
2001

2 Before Repairs

1.Turn off the power supply. Using a 10 Q. 10 W resistor,
connect both ends of power supply capacitors (C703,
C704) 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 230/240 V.

AC 230 V AC 240 V
47 ~ 157 mA 45 ~ 150 mA

Power supply voltage
Consumed current 50 Hz

Page

9 Schematlc Diagram Notes ...................................................... 9
1° Schematic Dlagram ..............
11 Printed Circuit Board Diagram
12 Wiring Connection Diagram -------------------------------------------------- 19
13 Block Diagram ...............

20

14 Terminal Function of leu 21
14.1. |0301 (M37470M2536S .Micro Computer 21

15 Replacement Parts List --------------------------------------------------------- 21
16 Cabinet Parts Location 24
17 Packaging ------------------ 26

3 Protection Circuitry

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

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

Sound stops during a performance.
The functions 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.

If this occurs, follow the procedures outlined below.
1.Switch OFF the power.
2. Determine 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.