Technics SA-5170 - Page 4

MAIN AMPLIFIER
EQUALIZER AMPLIFIER I.C.
m@ SPEAKER CIRCUIT PROTECTION FUSES
AM BAR ANTENNA
FM RF CIRCUIT
VARIABLE CAPACITORS
FM IF AMPLIFIERS &
AM CONVERTER I.C.
FM IF AMPLIFIER &
DETECTOR I.C.
FM MPX
PLL DEMODULATOR I.C.
The unit is provided with the speaker circuit protection fuses at the right and left channels respectively.
The fuse is to prevent the power transistor from destruction, should the speaker terminals be shor t-
circuited.
Accordingly, if the unit fails to function upon completion of the speaker connections, check the speaker
* protection fuses first of all for possible blowing.
@ ALIGNMENT POINTS
SPEAKERS
aa
iL OR Oy
®oo (s pan)
1 3mvV
FM OSC
Trimmer Coil Coil
TP602
VOLTMETER
qR644 >
lee toa)
13mV
[RisaT ]@®
TP601©
P60!
dR641p PLL OSC
el Adjustment
TP301©
LEFTI® €
[vR302 [202
= Separation AM IFT FM IFT
Fig. 1 (Abb. 1) Adjustment (Discriminator)
FM DET
@VOLTAGE
TR614
TP602' Bs
Less than
13mV
OUTPUT
VOLTMETER
Voltage check method
; (Stromspannung-priifmethode)
Fig. 2 (Abb. 2) Méthode de vérification
de tension
[4] SA-5170
FM ANT
Coil
AM ANT
Trimmer
FM ANT
Trimmer
FM DET
Trimmer
AM OSC
Trimmer
AM OSC
Coil
TP101----FM IF CHECK TOTMHE.
POINT
~150) tT /SOkHz
TP201----AM DETECTOR
OUTPUT POINT;
TP301----PLL OSCILLATOR
OUTPUT (19kHz) POINT
—
FM muting level
volume (VR101)
adjustment hole
AMMETER
Fig. 3 (Abb. 3)
@VOLTAGE
Current check method
(Stromstarke-Priifmethode)
Méthode de vérification
de courant