Technics QUARTZ SA-160 User manual

ORDER NO. AD8807203C2
Service Manual
CYUARTZ Synthesizer
AM/FM Stereo Receiver
SPECIFICATIONS
(DIN 45 500)
@ AMPLIFIER SECTION
DIN power output 1kHz continuous power
output both channels driven 2x 40W (8Q)
Total harmonic distortion half power at 1kHz 0.07 % (8Q)
Intermodulation distortion
rated power at 60Hz: 7kHz=4: 1, SMPTE, 8 0.5%
Power bandwidth both channels driven, —3dB 10Hz~40kHz (8Q)
Damping factor 20 (89)
Input sensitivity and impedance
PHONO 3mV/47kQ
CD, VCR 1, TAPE/VCR 2 200mV/22kQ
PHONO maximum input voltage (1kHz, RMS) 150mV
SIN
rated power (80)
PHONO 68dB8 (IHF, A: 71dB)
CD, VCR 1, TAPE/VCR 2 70d8 (IHF, A: 85dB)
Frequency response
PHONO RIAA standard curve
+0.8dB (30Hz~15kHz)
CD, VCR 1, TAPE/VCR 2 10Hz~70kHz (+3dB)
5 band graphic equalizer 80Hz, —-10dB~+10dB
250Hz, —10dB~+10dB
1kHz, —10dB~+10dB
4kHz, ~10dB~+10dB
Receiver
SA-160
Color
(K)...Black Type
Area
Continental
Europe.
Holland.
Australia.
F.R. Germany.
@ FM TUNER SECTION
Frequency range 87.50~ 108.00 MHz
Sensitivity
S/N 30dB 1.5uV (75Q)
S/N 26dB 1.3uV (75Q)
SIN 20dB 1.2uV (75Q)
IHF usable sensitivity 1.5yV (IHF '58, 75Q)
IHF 46dB stereo quieting sensitivity 22yuV/75Q0O
Total harmonic distortion
MONO 0.2%
STEREO 0.3%
SIN
MONO 60d8 (75dB, IHF)
STEREO 58dB (71dB, IHF)
20Hz~15kHz, +1dB~ —2dB
+400kHz, 65dB
Frequency response
Alternate channel selectivity
Loudness control (volume at —30dB) 50Hz, +9dB
Output voltage
VCR 1, TAPE/VCR 2 REC OUT 200mV
Channel balance, 250 Hz~6, 300 Hz +1dB
Channel separation 55dB :
Headphones output level and impedance 380 mV/330Q0
Load impedance
MAIN or REMOTE 4Q~160
MAIN and REMOTE 8N~160
12.5kHz, —-10dB~ +10dB
Technics
Capture ratio 1.0dB
Image rejection at 98 MHz 40dB
IF rejection at 98 MHz 70dB
Spurious response rejection at 98 MHz 70dB
AM suppression 50dB
Stereo separation
1kHz 40dB
10kHz 30dB
Carrier leak
19kHz —30dB (—35dB, IHF)
38kHz —45dB (—50dB, IHF)
Channel balance (250 Hz~6, 300 Hz) +1.5dB
Limiting point 1.2uV
Bandwidth
IF amplifier 180 kHz
FM demodulator 1000 kHz
Antenna terminals
75Q (unbalanced)
Matsushita Electric Trading Co., Ltd.
P.O. Box 288, Central Osaka Japan

SA-160
@ AM TUNER SECTION
Frequency range
522~1611kHz (9kHz-steps)
530~ 1620 kHz (10kHz-steps)
Power supply
For Australia AC 50Hz/60Hz, 240V
For continental Europe AC 50Hz/60Hz, 220V
Sensitivity (S/N 20dB) 20uV, 330nV/m Dimensions (W x H x D) 430 x 97 x 288mm
Selectivity
at
999kHz
55dB
(16-15/16"
x
3-13/16”
x
11-3/16")
Image rejection at 999kHz 40dB Weight 5.1kg (11.2 Ib.)
IF rejection at 999kHz 55dB
Notes:
1. Total harmonic distortion is measured by the digital spectrum
analyzer (H.P. 3045 system).
M@ GENERAL 2. Specifications are subject to change without notice.
Power consumption 250W Weight and dimensions are approximate.
i CONTENTS
Page Page
ACCESSORIES
|
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2
BLOCK
DIAGRAM
..........:cccccsesesesscrscessssceenrsereessecusenserneees
13~15
CONNECTIONS
TO
EQUIPMENT..........sc:cscsccssssesserssessessseenseese
3
DESCRIPTION
OF
FLUORESCENT
DISPLAY
............s0000005
16
FRONT PANEL CONTROLS AND FUNCTIONG................. 4,5 PRINTED CIRCUIT BOARDG.................
DISASSEMBLY INSTRUCTIONG.............ccccssssessesseres . 6~8 WIRING CONNECTION DIAGRAN ..
PROTECTION CIRCUITRY .........:ccccsscsssssssvsrsesessessessvseeersnesencoes 8 SCHEMATIC DIAGRAM ............0..s0000e
BEFORE REPAIR AND ADJUSTMENT ..........cccsssscsssssssseseesee 8 CABINET PARTS LOCATION ...........::ccsssessesecssusresenerneers
MEASUREMENTS AND ADJUSTMENTS...... 9, 10 REPLACEMENT PARTS LIST..........cscsssssseseessesseserseresnes
FUNCTION OF TERMINAL ...........c0ccssssssssssssssesenecsesseeseee 11, 12 RESISTORS & CAPACITORS. ............csccsesssssssssessseresesesee
TERMINAL GUIDE OF IC’S, TRANSISTORS AND
DIO DE Si isc ivncceccstcnn ete Rites cadesdecevascaagulnedvandacdavanin 12
Mi ACCESSORIES
© FM indoor antenna (1)
(SSA269M [XL]) (SPB1161)
(SSA270M [EX, EH, EG))
¢ AM loop antenna (1) * AM antenna holders (2)
(SMA233-1M) (SMA231M)
‘ie fan (B)
* AC power supply cord (1)
(SFDACO5E03 {EX, EH)])
(SJA173 [XL])
¢ Screws (2)
S 8
(XTN3 + 10AFZ)
Note: Configuration of AC power supply cord and FM indoor antenna differs according to area.

Mi CONNECTIONS TO EQUIPMENT
“PHONO” terminals
Connect a turntable.
Note:
For remote-contro! operation, be sure to
“VCR 1” terminals
Connect a video cassette recorder or an
audio tape deck etc. (Refer to the operat-
ing instructions of VCR, etc.)
Video cassette recorder (option)
connect the ground wire correctly.
Turntable (option)
ae ers EES 2
(GND) (R) (L)
Ground wire (option) Stereo
connection
cable (option)
(GND) (R) (L)
iN
CD REC PLAY REC PLAY
OUT BACK OUT
Stereo
connection
Stereo
connection
cable (option)
(R) (UY (A)
AUDIO
OUT
(O(ROR)
TT
“ORO A)
cables (option)
AC power supply cord
(included)
The configuration of the AC
outlet and AC power supply
cord differs according to
area.
Stereo
connection
cables (option)
This unit
Lolo [ol o|
P11] 2]
eIeS|eS|cs
a
(RL)
LINE OUT b ie
Compact disc player (option)
“CD” terminals
Connect a compact disc player.
LINE IN
Tape deck (option)
“TAPE/VCR 2” terminals
Connect a tape deck or second VCR.
“SPEAKERS” terminals
mw Load impedance:
MAIN and REMOTE : 8~169
MAIN or REMOTE : 4~160
LINE OUT
m@ “REMOTE” terminals
For connection to a second pair of
speakers.
® Twist the core of the speaker wires. 2
@ Lift up the lever, and insert the core
until it Can no longer be seen.
@ Press down the lever, and pull the
cord gently to be sure that it is secure. @
10 mm
+ *T (13/32")
= Twist
ack
Notes:
1. To prevent damage to circuitry, never
short-circuit positive (+) and negative (—)
speaker terminals.
2. Be sure to only connect positive (+)
cords to positive (+) terminals, and
negative (—) cords to negative (—) terminals.
3. Connections of speaker wires should be made before
connecting the AC power supply cords.

SA-160
@ FRONT PANEL CONTROLS AND FUNCTIONS
Amplifier section
Audio input selector/frequency display
(audio input selector/frequency)
[4] 7} [8] [memory] s ___ stereo
(2)
pal a FM fi Lt [| Mrz
tuner matrix {loudness} [quartz lock
Tape indicator
(TAPE) Loudness indicator (loudness)
Power switch (power ) Equalizer controls (graphic equalizer)
These controls are used to adjust the levels within each frequency band. The levels can be
varied continuously over a range of +10 dB~ — 10 GB. By sliding the controls at each of the
indicated frequencies in the ‘‘+” direction, the frequencies in that band are boosted, and by
sliding them in the “—"' direction, the frequencies in that band are attenuated.
Loudness switch (loudness)
Set to the “on” position (The loudness indicator will it
luminate.) when listening to music at low volume. Auditory
perception of sound in the low frequency range falls off at low
volume but when the switch is in this position, this deficiency
is compensated for, so that the full impact of the musical per-
formance can be enjoyed. Balance control
(balance)
Voiume-control
(volume)
Headphones jack (phones)
Speaker selectors (speakers)
These selectors are used to switch the speaker systems ON and OFF.
Input selectors (input selector)
These selectors are used to select the sound source
Tape-monitor switch (monitor)
Press this button to listen to tape.
No other sources selected by the input selector can be heard while the to be heard, such as a disc, radio broadcast, etc.
tape indicator is illuminated. To listen to some other source, press this The selected sound is shown on the audio input
button once again. selector/frequency display.

Tuner section
Signal-strength indicators (signal strength)
These indicators show the relative strength of
broadcast signals being received by the antenna.
The best condition for reception, for FM and AM, is
when the indicators illuminate completely to the top.
FM stereo indicator (stereo)
This indicator automatically illuminates when an FM stereo
broadcast is being received.
Note: it will not illuminate if the FM mode selector is pressed.
Memory indicator (memory)
This indicator illuminates when the memory button is pressed.
Quartz-lock
5 [memory] = indicator
Preset channel RED Aes (quartz lock)
matrix display rm LILA, This indicator
(tuner matrix) tuner matrix quartz lock — illuminates when tuned
precisely to an FM or
AM station.
FM mode selector (FM mode) Memory button (memory)
This unit automatically switches to the stereo mode This button is used when preset memory setting of the
when a stereo broadcast is received. Press this preset-tuning buttons is made.
selector to listen in the monaural mode. The stereo
indicator will not illuminate in the monaural mode.
Preset tuning buttons (1 ~0)
(24 channel random preset tuning)
These buttons are used to preset FM and AM broadcast frequen-
cies into the memory of this unit, and are also pressed to select
the desired preset frequencies.
Note:
The buttons marked [3) ~ [6] are also used to listen to radio broad-
casts arranged in convenient groups.
Group select button (select)
Assort-mode select button (assort)
Change-mode select button
(change)
Memory-scan/group-search button
(-M. scan/—group search)
Character-input/tuning buttons
(character/tuning)
RT
s scmtinedaiepsiliaullonpelaniaseand
phones,
Band selectors (band selector)
FM -AM
input satector
FM: Press this button 'to listen to an FM broadcast.
AM: Press this button to listen to an AM broadcast.
allocation:
When the AMbutton is pressed for about 4 seconds,
the AM frequency step will change to 10 kHz per
step. (This step is set to 9 kHz before shipment.) In
order to return to the original frequency indication,
press this button for about 4 seconds again.
SA-160
@ DISASSEMBLY INSTRUCTIONS
“ATTENTION SERVICER”
Some chassis components may have sharp edges. Be careful when disassembling and servicing.
Ref. No. Ref. No. How to remove the power SW P.C.B. and
aaah gcc speakers SW/headphones P.C.B.
1
e Remove the 5 screws (Q~@).
Procedure
1-2-3
¢ How to remove the power SW P.C.B.
1. Remove the power SW knob.
2. Remove the 1 screw (@).
3. Release the tab.
¢ How to remove the speakers SW/headphones
P.C.B.
1. Remove the 1 screw (@).
Cabinet
Screwdriver
acto
How
to
remove
the
front
panel
Procedure
1-2
1. Remove the 4 screws (@~®).
2. Remove the flat cable (J501).
How to remove the FL P.C.B.
Procedure
1-2-4
1. Remove the 3 screws (@~®).
2. Release the tab.
(No 1 side)
White line (2) pul
/
push
|
Connector

SA-160 SA-160
Ref.No. | How to remove the tuner P.C.B. Ref. No. Ref.No. | How toremove the volume control P.C.B. | Ref. No. ;
and main P.C.B. How toremove the power tc. and balance control P.C.B. 8 How to remove the key switch P.C.B.
Procedure
Procedure
Procedure
Procedure
1.
Remove
the
12
screws
(9~@®).
1.
Unsolder
the
power
IC.
¢
How
to
remove
the
volume
control
P.C.B.
1.
Remove
the
2
screws
(@,
@)
and
remove
the
2.
Remove
the
tuner
P.C.B.
and
main
P.C.B.
2.
Remove
the
2
screws
(@,
@).
1.
Remove
the
volume
control
knob.
P.C.B.
holder.
2.
Remove
the
nut.
2.
Remove
the
2
screws
(@,
©).
3. Release the Tabs.
¢ How to remove the balance control P.C.B.
1. Remove the balance control knob.
2. Remove the 2 screws (@, @).
Volume
control P.C.B.
Unsolder the
power IC
Balance control
holder
Note:
When
mounting
the
power
IC,
apply
silicon
terminal
compound
(SZZOL15)
to
the
rear
of
the
power
IC.
Balance
Volume
control
knob
control
knob
How to check the main P.C.B.
1. Remove the 4 screws (@~®) in above figure.
2. Remove the 9 screws (@~@).
3. Remove the bottom chassis in the direction of
the arrow (Q).
Mi PROTECTION CIRCUITRY
The protection circuitry may have operated if either
of the following conditions is noticed:
If this occurs, follow the procedure outlines below:
1. Turn off the power.
¢ No sound is heard when the power is turned on.
e 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.
2. Determine the cause of the problem and correct
it.
3. Turn on the power once again after one minute.
Note:
When the protection circuitry functions, the unit will
not operate unless the power is first turned off and
then on again.
M@ BEFORE REPAIR AND ADJUSTMENT
1.
Turn
off
the
power,
discharge
both
power
supply
2.
After
completion
of
repair,
slowly
apply
the
primary
capacitors
(C701,
C702 4700yF)
through
a
109
5W
voltage
by
using
a
variac
to
avoid over
current.
resistor
to
ground.
Do
not
short
between
C701
and
Current
consumption
at
50Hz/60Hz
in
no
signal
C702.
It
may
damage
the
capacitors.
mode
should
by
shown
with
respect
to
supply
voltage 220V/240V.
Power supply voltage
Bottom chassis
50/60 Hz 120~320mA | 100~300mA

Mi MEASUREMENTS AND ADJUSTMENTS
mFM
Control positions and equipment used
¢ FM signal generator (FM-SG).
Stereo modulator
* Distortion analyser
¢ Oscilloscope
eAC and DC electronic voitmeter (EVM)
e Frequency counter
¢Choke coil (100yH)
¢ Resistor (100 kQ)
Note: For 2201, Z202, L321, L322 and L324, adjusted parts are supplied. So, do not turn the cores of these parts.
FM MONO DISTORTION ADJUSTMENT
1. Test equipment connection is shown in figure.
2. Set the unit to “FM” position.
3. Set the radio frequency display and signal generator
to 100.10 MHz.
4. Adjust T201 core so that voltage measured in signal
mode is OmV (0+20mV) in 300mV range.
}. Adjust T202 so that the distortion factor of Lch is
minimized.
. Repeat steps 4 and 5 a few times.
. Make sure that the distortion factors of Lch and Rch
are nearly the same with each other to minimum.
Note:
The adjusting screwdriver used should be made of
resin.
MPX VCO ADJUSTMENT
. Test equipment connection is shown in figure.
. Set the unit to “FM auto” position.
. Set the radio frequency display and signal generator
to 100.10MHz.
. Adjust VR301 for 19.00 +0.03kHz on frequency
counter reading.
% USING ALTERNATE SYSTEM
1. Apply stereo signa! from generator or receive the
stereo broadcast.
‘2. Adjust VR301 until stereo indicator lights up.
Cement arm of VR301 as shown in figure.
FM STEREO SEPARATION ADJUSTMENT (For [EG] area.)
1.Test equipment connection is shown in figure.
2.Set the unit to "FM” mode.
3.Set the radio frequency display and signal generator to
100.10MHz.
4.Adjust VR302 so that the R-CH output is minimized when
stereo modulator is in “L”(L-CH modulation) mode.
FM SIGNAL GENERATOR CONDITION
Modulation
Modulation frequency 1kHz
(MONO)
Output level
FM SIGNAL GENERATOR CONDITION
Modulation 0%
FREQUENCY
FM ANTENNA COUNTER
TERMINAL
: Stereo ON position
®-
©)
-
©):
Stereo
OFF
position
-@
{indicator lighting)
© : Adjust point of Pilot circuit
FM SIGNAL GENERATOR CONDITION
Modulation Stereo “L” mode or “R”
mode ‘90%, Pilot 10%
Modulation frequency 1kHz (Pilot 19kHz)
Output level
LPF (fo= T5kHz~ 19kHz)
SA-160
FM STEREO DISTORTION ADJUSTMENT (For [EG] area.) FM SIGNAL GENERATOR CONDITION
Modulation Stereo “L’’ mode or “R”
mode 100%
1. Test equipment connection is shown in figure.
2. Set the unit to “FM” mode.
3.Set the radio frequency display and signal generator to
100.10 MHz.
4. Adjust L1so that the distortion factor of L-CH is minimized.
5. Make sure that the distortion factors of L-CH and R-CH are
nearly the same with each other to minimum.
Modulation frequency
Output level
Notes:
1. The adjusting screwdriver used should be made of resin.
2.L1 should be rotated no more 1/4 turn (90 deg.) on either
side.
Stereo modulator Adjust within +90°
Output mode... Lor R
e Adjustment points
AM ANT FM ANT
FM offset
coil
FM MONO
DISTORTION
coil
FM STEREO
SEPARATION Adj.
MPX VCO Adj.

SA-160 SA-160
Mi FUNCTION OF TERMINAL
e 10901 (LC6554H3682): microcomputer
DESCRIPTION OF TERMINAL
Segment signal output
Key return signal input
— -}
STAND BY Power supply terminal
OFF Power ON/OFF input
1 STEREO Stereo signal input
SD signal input
= No
>= 20-2 N a
NO °o
EE
ae ae <
1/0 Deck control terminal
=a]
(oe)
4 RELAY Relay control output
:
N Not connected
Auto/mono changeover terminal
— fo]
Muting control output
Attenuator control output
AFM AF signal muting control output
=
ie}
Ground terminal
vU
Vss Ground terminal
24 OSC1 Oscillator terminal
OSC2 Oscillator terminal
nD
Reset signal input
PFO/D1 Serial data output terminal
27
PF1/CK Clock signal terminal for serial data
PF2/CE Chip enable terminal
PF3/INT Remote control input
30
Ground terminal
[e%) prs
le
32 Cc Ground terminal
n +
Control signal terminal for |C401 (TC9163N)
wo i?)
DESCRIPTION OF TERMINAL
Not connected
hy gees | LOUDNESS ro. Loudness control output
PJO (R)
PJ1 (F)
iy ae Ne We ie Power supply terminal (negative voltage)
44 $2
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Volume motor drive output
Segment signal output
LC6554H3682
(64 PIN)
28J40CD
2SK381
SVGLB74UR3HL
~~
2802785, 2SC2787,
2SD1450
ES
c
B
[um7oot _[@ PIN AN72796 [16 PIN
swrorncs| 16 Pin | TooT6aN [26 PIN
Cathode
SVDS2V20, 188133, | _
MA29WA, MA167,
SVD1SR35200A
Anode
28B1185,
28D1762
Anode
MTZ6R8B, MA4056M,
MA4110M, MTZ15BT77,
Cuiaee
MA4030M,
MA4062M,
, MTZ30BT77
Cathode
Ca o——_}<}0 A
AA1A4M, AA1A4Z
e-
aGr)
E'

Mi BLOCK DIAGRAM
FM MONO DISTORTION adj
R313,
C33
Q301~Q303
MUTING
TP201°TP20I* 202
FM ANT. fl £T°y FM
FM FRONT END aE i ec Coil CB)
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FM/AM
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