Technics SADV 170 Service Manual

Page 1

ADOOOS1 12C2

Service Manual

Tuner/Amplifier
5mg. sms SA-DV1 70
Remote Colour
Control .
Transmitte (S) ........... Silver Type
System SC-DV17O
Sound Processor SH-DV170
. . . Tuner/Amplifier SA-DV170
Because of unique Interconnectlng cables, when a component DVD Change, SL-DV170
requires service, send or bring in the entire system. Cassette Deck RS-DV170
Front Speakers* SB-EH760
Center Speaker* SB-PC75
Surround Speakers SB-PS75

Specifications

Amplifier section
Power output (LlFt both channel driven):
Stereo mode;

DIN 10 kHz, THD1 °/. (High) 2 X 20 w (6 Q)
1 kHz, THD1 % (Mid) 2 X 20 W (6 Q)
100 Hz, THD1 °/. (Low) 2 X 43 w (a 9)
RM8 10 kHz,THD1o%(High) 2x30w (e o)
1 kHz, THD 10 °/. (Mid) 2 x 30 w (e o)
100 Hz,THD10%(Low) 2x65W(8 9)
PRO LOGIC mode:
DIN FRONT 1 kHz, THD 1 %

2x20W(eo)
2x43W(8s2)

/'I'I'L Imp. (High/Mid);
100 Hz, THD1 % (Low);

SURROUND 1 kHz. THD 1 %; 2 x 22 w (a o)
CENTER 1 kHz, THD 1 %; 60 w (a (2)
FtMS FRONT 1 kHz,THD10%

ITTL Imp. (High/Mid); 2 x so w (e o)

100 Hz, THD 1o % (Low); 2 x 65 w (a o)

SURROUND 1 kHz, THD 10%; 2 x so w (s o)
CENTER 1 kHz. THD 10 %; 80 w (a :2)

PMPO 1 kHz: 3.000 W

(High or Mid s Q, Low, CENT, SUFtFt. s :2)
Total harmonic distortion:
Rated power at 1 kHz;
Half power at 1 kHz;
Load impedance:
FRONT (High/Mid);

1%(69)
0.1%(69)

total impedance 6 9

(Low); 8 Q
SURROUND: 8 Q
CENTER; 8 o

S.WOOFER:
Center frequency; 70 Hz

LEVEL (VOL-20 dB): MID +8 dB, MAX +12 dB

Technics®

* : Made in Spain.

FM tuner section
Frequency range:
Sensitivity:

SIN 26 dB;
SIN (MONO):
Antenna terminal(s):
AM tuner section
Frequency range:

87.50 - 108.00 MHz (0.05 MHz steps)
1.8 W (IHF usable)

1.5 uV

70 dB (75 dB, IHF)

75 Q (unbalanced)

522 - 1629 kHz (9 kHz steps)
520 - 1630 kHz (10 kHz steps)

Sensitivity (SIN 20 dB): 500 uV/m
Timer section

Clock: Quartz - lock type
Function: Play timer (1 time, daily), Rec timer (1 time, daily),

Sleep timer (120 min, 30 min intervals)
Setting intervals (Play/Rec): 1 minute - 23 hours 59 minutes
(1 min intervals)

General
Power supply:
(EB) area; AC 230 - 240 V, 50 Hz
(EG) area; AC 230 V, 50 Hz
Power consumption: 230 W
Standby;
Normal mode 11 W
ECO mode 05 W

Dimensions (Wx H>< D):

Mass:

293x118.5><346 mm

5.3 kg

Notes: Specifications are subject to change without notice.
Mass and dimensions are approximate.
Total harmonic distortion is measured by the digital spectrum
analyzer.

© 2000 Matsushita Electric Industrial 00., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.

Page 2

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.

CONTENTS

Page

1 Before Repairs ------------------------------------------------------------------------ 2

2 Protection Circuitry ---------- n2
3 A ries '-

4 Caution for AC Mains Lead" "4

5 Location of Controls --------------------------------------------------------------- 5

6 Operation Checks and Component Replacement Proceduress

6.1. Checking for the AC IN P.C.B_ --------------------------------------- 6

6.2. Checking for the operation P.C.B. ----------------------------------- 6

6.3. Checking for the main P.C.B. ----------------------------------------- 7

6.4. Replacement for the regulator transistor- "8
6.5. Replacement for the power IC ------------ --8
7 To Supply Power Source -------------------------------------------------------- 9
8 Self-Diagnostic Function ------------------
8.1. To display the malfunction code

1 Before Repairs

1.Turn off the power supply. Using a 10 S2, 10 W resistor,
connect both ends of power supply capacitors (C701, C703
and C702, 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.

AC230V | AC 240v
130-380 mA

Power supply voltage
Consumed current 50 Hz

Page

8.2. To return to the normal display ------------------------------------ 10

8.3. Display contents

9 Schematic Diagram Notes
10 Schematic Diagram -------
11 Printed Circuit Board Diagram ---------------------------------------------- 22
12 Type Illustration of ICs, Translstors and Dlodes
13 erlng Connectlon Dlagram -------------------------------
14 Termlnal Functlon of ICS ------------------------------------------------------ 23
14.1. |0901 (CZBAFDOOOO43):System Control/FL Drive --------- 28

15 Block Diagram --------
16 Replacement Parts L
17 Cabinet Parts Location --------------------------------------------------------- 33
18 Packaging ----------------------------------------------------------------------------- 39

2 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.