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ORDER NO. MD9707082C2
AV Control Stereo Receiver Receiver
SA-EX310 Colour
(K) . . . . . . . . Black Type
Area
Suffix for Area Colour
Model No.
(E) Europe
(EB) Great Britain (K)
(EG) Germany and Italy
*Manufactured under license from Dolby Laboratories Licensing Corporation. Additionally licensed
under one or more of the following patents: U.S. numbers 3,632,886,3,746,792 and 3,959,590;
Canadian numbers 1,004,603 and 1,037,877.
"Dolby" and the double-D symbol are trade marks of Dolby Laboratories Licensing Corporation.
SPECIFICATIONS\ ÒÅÕÍÈ×ÅÑÊÈÅ ÕÀÐÀÊÒÅÐÈÑÒÈÊÈ
PROTECTION CIRCUITRY\ ÑÈÑÒÅÌÀ ÇÀÙÈÒÛ
CAUTION FOR AC MAIN LEADS\ ÌÅÐÛ ÁÅÇÎÏÀÑÍÎÑÒÈ ÏÐÈ ÐÀÁÎÒÅ ÑÎ ØÍÓÐÎÌ
ÏÈÒÀÍÈß ÏÅÐÅÌÅÍÍÎÃÎ ÒÎÊÀ
OPERATION CHECKS AND MAIN COMPONENT REPLACEMENT
PROCEDURES\ ÏÐÎÂÅÐÊÀ ÐÀÁÎÒÎÑÏÎÑÎÁÍÎÑÒÈ È ÇÀÌÅÍÀ ÎÑÍÎÂÍÛÕ
ÊÎÌÏÎÍÅÍÒÎÂ
FAN MOTOR TROUBLESHOOTING\ ÍÅÈÑÏÐÀÂÍÎÑÒÈ ÄÂÈÃÀÒÅËß ÎÕËÀÆÄÅÍÈß
TROUBLESHOOTING\ ÍÅÈÑÏÐÀÂÍÎÑÒÈ È ÌÅÒÎÄÛ ÈÕ ÓÑÒÐÀÍÅÍÈß
BLOCK DIAGRAM\ ÁËÎÊ-ÑÕÅÌÀ
TERMINAL FUNCTIONS OF IC's\ ÔÓÍÊÖÈÎÍÀËÜÍÎÅ ÍÀÇÍÀ×ÅÍÈÅ ÂÛÂÎÄÎÂ
ÈÍÒÅÃÐÀËÜÍÛÕ ÌÈÊÐÎÑÕÅÌ
TERMINAL GUIDE OF IC's, TRANSISTORS & DIODES\ ÖÎÊÎËÅÂÊÀ ÂÛÂÎÄÎÂ
ÈÍÒÅÃÐÀËÜÍÛÕ ÌÈÊÐÎÑÕÅÌ, ÒÐÀÍÇÈÑÒÎÐÎÂ È ÄÈÎÄÎÂ
SCHEMATIC DIAGRAMS\ ÏÐÈÍÖÈÏÈÀËÜÍÛÅ ÑÕÅÌÛ
PRINTED CIRCUIT BOARDS\ ÏÅ×ÀÒÍÛÅ ÏËÀÒÛ
WIRING CONNECTION DIAGRAM\ ÑÕÅÌÀ ÑÎÅÄÈÍÅÍÈß
CABINET PARTS LOCATION\ ÐÀÑÏÎËÎÆÅÍÈÅ ×ÀÑÒÅÉ ÊÎÐÏÓÑÀ
REPLACEMENT PARTS LIST\ ÑÏÈÑÎÊ ÇÀÏÀÑÍÛÕ ×ÀÑÒÅÉ
RESISTORS & CAPACITORS\ ÐÅÇÈÑÒÎÐÛ È ÊÎÍÄÅÍÑÀÒÎÐÛ
PACKAGING\ ÓÏÀÊÎÂÊÀ
© 1997 Matsushita Electronics (S) Pte. Ltd.
® All rights reserved. Unauthorized copying and
distribution is a violation of law.
SA-EX310
Specifications
FM Tuner Section
Frequency range 87.50 108.00 MHz 38kHz -50 dB (-55 dB, IHF)
Sensitivity Channel balance (250 Hz - 6.3 kHz ) +1.5 dB
S/N 30 dB 1.5 µV / 75 Limitting point 1.2 µV
S/N 26 dB 1.3 µV / 75 Bandwidth
S/N 20 dB 1.2 µV / 75 IF amplifier 180 kHz
IHF usable sensitivity 1.5 µV / 75 (IHF '58) FM demodulator 1000 kHz
IHF 46 dB stereo quieting sensitivity 22 µV / Antenna terminal(s) 75 (unbalanced)
75
Total harmonic distortion
MONO 0.2%
STEREO 0.3% Video Section
S/N Output voltage at 1V input (unbalanced) 1±0.1 Vp-p
MONO 60 dB (75 dB, IHF) Maximum input voltage 1.5 Vp-p
STEREO 58 dB (71 dB, IHF) Input/output impedance 75 (unbalanced)
Frequency response 20Hz 15 kHz (+1dB, 2dB)
Alternate channel selectivity + 400 kHz 65 dB
Capture ratio 1 dB AM Tuner Section
Image rejection at 98MHz 40 dB Frequency range AM
IF rejection at 98MHz 70 dB ( 9 kHz steps ) 522 1611 kHz
Spurious response rejection at 98MHz 70 dB ( 10 kHz steps ) 530 1620 kHz
AM suppression 50 dB Sensitivty 20 µV, 330 µV / m
Stereo separation 1kHz 40 dB Selectivity ( at 999 kHz ) 55 dB
Carrier leak Image rejection ( at 999 kHz ) 40 dB
19kHz -30 dB (-35 dB, IHF)
IF rejection ( at 999 kHz ) 55 dB
Amplifier Section
Power output (at 240 V) Tone controls
DIN 1 kHz (T.H.D. 1%) 2 X 60 W(4) BASS 50 Hz , +10 to -10 dB
40 Hz20 kHz continuous power output TREBLE 20 kHz, +10 to -10 dB
both channels driven 2 X 40 W(8) Output voltage
Total harmonic distortion TAPE REC (OUT), VCR OUT 200 mV
Rated power at 40 Hz 20kHz 0.8 % (8) Channel balance (250 Hz - 6.3 kHz) + 1 dB
Half power at 1 kHz 0.07 % (8) Channel separation 55 dB
Power output at the Dolby Pro Logic operation Headphones output level and impedance 430 mV / 330
DIN 1 kHz ( T.H.D. 1 % ) Subwoofer frequency responce 7 100 Hz, + 3 dB
Front 2 X 50 W (4)
Center 50 W (8)
Surround 50 W (8)
Damping factor 30 (8) General
Load impedance Power consumption 160 W
Front 4 - 16 Power supply
Center 8 - 16 E , EG AC 230 V, 50 Hz
Surround 4 - 16 EB AC 230 - 240 V, 50 Hz
Power bandwidth both channels driven, -3 dB 10 Hz - 40 kHz (8) Dimensions (W x H x D) 430 x 136 x 309 mm
Intermodulation distortion rated Weight 7.3 kg
power at 60 Hz : 7 kHz = 4:1, SMPTE 0.5 % (8)
Frequency response
PHONO RIAA standard curve(30Hz-15kHz) +0.8 dB Notes :
CD, TAPE, VCR, TV/DVD 10Hz 40kHz, +3 dB
Input sensitivity and impedance 1. Specifications are subject to change without notice.
PHONO 3 mV / 47 k Weight and dimensions are approximate.
CD, TAPE, VCR, TV/DVD 200 mV / 22 k 2. Total harmonic distortion is measured by the digital spectrum
S/N at rated power ( 8 )
PHONO 70 dB (IHF, A: 80 dB)
CD, TAPE, VCR, TV/DVD 75 dB (IHF, A: 85 dB)
Protection Circuitry
The protection circuitry may have operated if either of the follow- the indicated rated impedance of the amplifier are used.
ing conditions are noticed: If this occurs, follow the procedure outlines below:
No sound is heard when the power is turned on. 1. Turn off the power.
Sound stops during a performance. 2. Determine the cause of the problem and correct it.
3. Turn on the power once again after one minute.
The function of this circuitry is to prevent circuitry damage if, for
example, the positive and negative speaker connection wires Note:
are "shorted", or if speaker systems with an impedance less than When the protection circuitry functions, the unit will not operate
unless the power is first turned off and then on again.
SA-EX310
Caution for AC Main Leads
(For EB area code model only.)
THIS PLUG IS NOT WATERPROOFKEEP DRY.
For your safety, please read the following text carefully.
Before use
This appliance is supplied with a moulded three pin mains plug Remove the connector cover.
for your safety and convenience.
A 5-ampere fuse is fitted in this plug. How to replace the fuse
Should the fuse need to be replaced please ensure that the The location of the fuse differ according to the type of AC mains
replacement fuse has a rating of 5-ampere and that it is approved plug (figures A and B). Confirm the AC mains plug fitted and follow
by ASTA or BSI to BS1362. the instructions below.
Check for the ASTA mark ASA or the BSI mark on the body Illustrations may differ from actual AC mains plug.
of the fuse.
1. Open the fuse cover with a screwdriver.
If the plug contains a removable fuse cover you must ensure that
it is refitted when the fuse is replaced. Figure A
If you lose the fuse cover, the plug must not be used until a
replacement cover is obtained.
A replacement fuse cover can be purchased from your local
dealer.
CAUTION !
IF THE FITTED MOULDED PLUG IS
UNSUITABLE FOR THE SOCKET OUTLET IN
YOUR HOME THEN THE FUSE SHOULD BE
REMOVED AND THE PLUG CUT OFF AND
DISPOSED OFF SAFELY.
THERE IS A DANGER OF SEVERE
ELECTRICAL SHOCK IF THE CUT OFF PLUG
IS INSERTED INTO ANY 13-AMPERE
Fuse cover
SOCKET.
Figure B
If a new plug is to be fitted, please observe the wiring code as
shown below.
If in any doubt please consult a qualified electrician.
IMPORTANT
The wires in this mains lead are coloured in accordance with the
following code:
Blue: Neutral 2. Replace the fuse and close or attach the fuse
Brown: Live
cover.
As these colours may not correspond with the coloured markings
identifying the terminals in your plug, proceed as follows:
The wire which is coloured Blue must be connected to the terminal Figure A
which is marked with the letter N or coloured Black or Blue.
The wire which is coloured Brown must be connected to the Fuse
terminal which is marked with the letter L or coloured Brown or (5 ampere)
Red.
WARNING: DO NOT CONNECT EITHER WIRE TO
THE EARTH TERMINAL WHICH IS MARKED WITH
THE LETTER E, BY THE EARTH SYMBOL OR
COLOURED GREEN OR GREEN/YELLOW.
Figure B Fuse
(5 ampere)
SA-EX310
Operation Checks and Main Component Replacement Procedures
"ATTENTION SERVICER" Some chassis components may have sharp edges. Be careful when disassembling and servic-
ing. Please take note that the diagrams shown are for model SA-EX510 which is similar to SA-
EX310.
1. This section describes procedures for checking the operation of the major printed circuit boards and
replacing the main components.
2. For reassembly after operation checks or replacement, reverse the respective procedures.
Special reassembly procedures are described only when required.
3. Select items from the following index when checks or replacement are required.
Contents
Checking Procedure For Each Major P.C.B ........................................................................................ 4 ~ 6
Main Component Replacement Procedures ........................................................................................ 6 ~ 8
Checking Procedure For Each Major P.C.B.
1. Checking of the Panel P.C.B., and Tuner P.C.B.
a
a
Step 1 b
Step 2
a X
4 b X
2
a
PANEL P.C.B.
(Solder Side)
IN/OUT TERMINAL P.C.B. a
(Solder Side)
[SNE2129-1] (Black)
TUNER P.C.B. b
(Solder Side)
[XTBS3+8JFZ1] (Black)
2. Checking of the In/Out Terminal P.C.B.
Step 1
Remove the top cabinet. 2
1
Step 3
Release the catch, pull
Catch
the rear panel in the
direction of arrow 1 and
Step 2
simultaniously remove the
In/Out Terminal P.C.B. in b X 14
the direction of arrow 2
. IN/OUT TERMINAL
P.C.B.
Catch
SA-EX310
To Remove Front Panel, Panel P.C.B., Power Switch
Step 4
P.C.B. and Headphone Jack P.C.B.
Remove the Volume Knob
Step 1 and Nut.
Step 6
Remove the top cabinet. c
c X c
c
18 c
Step 5
Pull out 3 knobs.
c c d X1
b X3 c c c
Step 2 b
Step 7
b
Step 3
Remove the front panel in Panel P.C.B.
the direction of arrow.
Power Switch P.C.B.
c
[XTBS26+10J]
Step 8 d
Pull out the Headphone
Headphone Jack P.C.B. Jack P.C.B. [RHD26016]
3. Checking of the MAIN P.C.B.
Step 1
Remove the top cabinet.
Step 2
Remove the front panel. b
b
b
Step 3
f X
f b
13
Step 5 b X4
Step 7
Lift the rear panel in the direction of arrow
f 2 .
2
catch
Step 4
e X4
f
1
Step 6
Release 2 catches and pull the rear panel in
catch
the direction of arrow 1 for about 10mm.
(Note : Main, Tuner and In/Out Terminal
P.C.B. are attach to the rear panel)
SA-EX310
MAIN P.C.B. (Solder Side)
Step 8
Connect the front panel to
the main P.C.B. as shown.
Check the Main P.C.B. as shown e
[XTB3+8FFZ] (Black)
f
[XTB3+20JFZ] (Black)
Main Component Replacement Procedures
1. Replacement of the Power IC and
Regulator Transistor
Step 1 Step 3 Fold the joints. (6 joints)
Remove the top cabinet.
Step 2 Cut the joints as shown below. (6 joints)
Step 4
Desolder the terminals of Power IC and
Regulator Transistor.
SA-EX310
Regulator transistor
(Q701,Q708)
[2SD2374PQAU,2SB1548PQAU]
Step 5 g g g
g X3
Power IC (IC602)
[RSN3305-P] [XTW3+15T]
Installation of the bottom cover after replacement
Step 1
*
Step 3
Screw (XTB3+8J)
h (Prepare this screw to fix the bottom cover.)
Ribs
Lugs
Step 2
Align the ribs of bottom cover into the lugs.
h
[XTB3+8J] (Black)
CAUTION
1. After replacing the power IC or regulator transistor, apply a sufficient
quantity of compound grease (RFKX0002/SZZ0L15) between the
heat sink and the power IC or regulator transistor (Radiation
of power IC). g
2. Tighten enough the screws ( ) after replacing the power IC and A short straight screwdriver A long straight screwdriver
regulator transistor. Otherwise, the heat radiation works little.
3. When installing or removing the power IC or transistor holder, be sure Fig.2 Fig.1
to use an offset screwdriver.
A long straight screwdriver cannot be used for removing or mounting
the screws since its long grip interferes with the neighbouring P.C.B. Insufficient tightening will cause poor heat dissipation from the power
and transformer.(See Fig.1 & 3) IC and regulator transistor and,in the worst case, may lead to their
A short straight screwdriver may be used for removal, but cannot be thermal breakdown.
used for mounting because the limited space in the unit will not allow
sufficient tightening torque.(See Fig.2 & 3)
SA-EX310
Screws
AC In / Out
P.C.B.
Tuner & Tuner
Pack P.C.B.
Pro Logic
Transformer P.C.B.
P.C.B.
Power
P.C.B.
Fig.3
Front Panel
About 9 cm
(A long straight screwdriver
connot be used)
OFFSET SCREWDRIVER
The PROTO offset screwdriver No.34-1/4 is recommended for use in the application above.
The address of PROTO International Sales is as follows.
Phone: 305-591-3828
Europe
Japan Stanley-Proto Europe
Stanley Works Japan Woodside, Sheffield
2-7-16 Hyakunin-Cho 539PD
International Sales Shinjuku-ku England
Tokyo 160 Japan Fax: 44-742-739-038
Fax: 81-3-3360-8456 Phone: 44-742-768-888
International Sales Office Singapore, Indonesia, Phone: 81-3-3360-
Stanley-Proto Industrial Tools Philippines, Korea, Hong 8458 Canada
14117 Industrial Park Blvd. Kong, Malaysia, China. Stanley-Proto Canada
Covington, GA 30209 U.S.A. Stanley-Proto Asia Pacific Mexico 1100 Corporate Drive
Fax: 706-786-4387 12 Gul Drive Herramientas Stanley S.A. Burlington, Ontorio
Phone: 706-787-3800 Singapore 2262 DE C.V. Canada, L7L 5R6
Fax: 65-861-3206 Apartado Postal 675 Fax: 416-335-0075
Australia, New Zealand & Phone: 65-862-0883 72030 Puebla, Pue, Maxico Phone: 416-335-0075
South Pacific Fax: 52-22-494-4880
Stanley-Proto Industrial Tools Thailand Phone: 52-22-495-300 Middel East, Mediterranean
P.O.Box 10 Stanley-Proto Thailand Ltd. & Africa
400 Whitehorse Road 1017 Moo 13 Bangkaew South & Central America, Stanley-MEMA
Nunrweding 3131 Amphur Bangplee Puerto Rico, The Caribbian Cory House The Rlng
Victoria, Australia Samutprakarn, Thailand Stanley Inter-America Bracknell Berkshire
Fax: 61-3-894-1173 Fax: 66-2-316-6071 2101 N.W. 84th Ave. RG 12 1A2
Phone: 61-3-878-9244 Phone: 66-2-316- Miami, Florida 33122 England
8655 Fax: 305-594-4261 Fax: 44-344-485-526
Phone: 44-344-51813
SA-EX310
Fan Motor Troubleshooting
The Model SA-EX310 employ fan motor error sensing electronics.
If the cooling fan is not operating and "OVER LOAD" is displayed on the FL display, check the fan motor and its driving circuit
.
"OVER LOAD" is displayed on the FL display.
Is the air
cooling path blocked YES
or the fan motorjammed Remove the obstacle.
by any external
obstacle ?
NO
Remove the fan from the unit.
Is the fan NO Fan motor failure
motor's DC resistance Short circuit : DC resistance below 5
20 ~ 30 ? Open circuit : DC resistance over 1k
YES
Reinstall the fan on the unit.
Are the
terminal voltage of
Q772 and Q773 normal in both NO
Check the integrity of Q772, Q773 and the fan
and inactive states of the motor driving circuit. (see Fig.1)
fan motor ?
(see table1.)
Q772,Q776
2SC1740SSTA
50V4.7 35V4.7
C771 C772
MOTOR DRIVE
R771 R772
+
47K
YES
(Voltage table) Q777 Q777
+ 2SA933SSTA
47K
1SS133
MOTOR DRIVE
D774
fan. off fan. on Q778
Q778
E 14.5V 14.5V D771 D772
1SS133 RVTDTA114TST
R777
MOTOR DRIVE
47K
Q772 C 0V 14.5V
R778
4.7K
Q776
MTZJ9R1CTA
B 14.5V 0V
R773
10K
0.022
D773
R779
C773
R774
3.3M
E 0V 8.5V 10K
CP771
Q773 C 14.5V 14.5V Q772 R775
FAN
0.022
C775
330
B 0V 8.5V R776
M MOTOR
4.7 1/4W
(Table 1) Q773
2SB621AQSTA
REGULATOR
Fig.1
Is an audio signal NO
present at pins 7 and 10 The power IC ( IC601 ) is defective.
of IC601
YES
The fan motor, power ICs and fan driver
are functioning normally.
SA-EX310
Troubleshooting
This unit has test points on each circuit board block for use in troubleshooting.
CONNECTION
Connect either a CD player, tape deck or AF oscillator to the input terminals of the unit.
REQUIRED ITEMS
1. Testing with a CD player Test disc (SZZP1054C / first progarm, 1kHz, 0dB)
2. Testing with a tape deck Test tape (QZZCLA / 315Hz, 0dB)
3. Testing with a AF oscillator Set the output at 500Hz, 200mV
4. Oscilloscope (min. 10MHz) ----------- To measure the output waveform at the test points.
TEST PROCEDURE FOR AMPLIFIER CIRCUIT
When the CD player AF oscillator is connected: When the tape deck is connected:
Power on the unit. Power on the unit.
Set the input selector button of the unit to the "CD" postion. Set the input selector button of the unit to the "TAPE MONITOR"
Set the Speaker select buttons of the unit to the SPEAKERS " postion.
ON" position. Set the Speaker ON/OFF button of the unit to the SPEAKERS
"ON" position.
Run the CD player or Run the AF oscillator
Run the tape deck
(SZZP1054C / first program
) (Oscillator output
)
1kHz, 0dB at 500Hz, 200mV
(315Hz, 0dB)
QZZCLA
Using the Oscilloscope, check the output waveforms at the test Note: Connect the '+' probe of
points on the circuit boards of the unit in the following order: the oscilloscope to each
(L1,R1) (L2,R2) (L3,R3) (L5,R5) (L6,R6). test point and the ''
Refer to page 10. probe to chassis ground.
TEST POINTS POSITIONS OF AMPLIFIER CIRCUIT
MAIN P.C.B. ( component side )
L6 J248
R6
J247 PANEL P.C.B. ( component side )
L3 R3
VR502
J318 L5 C1001
J319 R5 L1 +
R1 +
C1002
L2 C1067
R2 +C1004
SA-EX310
NORMAL WAVEFORMS OF AMPLIFIER CIRCUIT AND LIKELY FAULTY BLOCKS
Likely faulty block if the normal
TP CD player Tape deck AF oscillator waveform shown at the left is not
present.
L1/R1 Input selector block IC402 &
area
0.5msec 2V 1msec 500mV 1msec 500mV
L2/R2 Dolby pro logic blockIC1001 and
IC1002& area
0.5msec 2V 1msec 500mV 1msec 500mV
L3/R3 Master volume block VR501 &
area
0.5msec 500mV 1msec 50mV 1msec 100mV
L5/R5 Power limiter block Q601 to
Q602 & area
0.5msec 100mV* 1msec 500mV 1msec 500mV
L6/R6 Main amplifier block IC601 &
area
0.5msec 5V* 1msec 10V 1msec 10V
Measurement conditions.
Volume control (VR501), Treble
control (VR512) and Bass control (VR511) positions :
*Volume control position (VR501) for these test :
CHECKING PROCEDURE FOR SURROUND CIRCUIT
Outputting surround signal normally requires that opposite phase signals be applied to both the left and right channels.
However, this unit incorporates a service mode, allowing the surround circuit to be tested using in-phase signals.
When the CD player or AF oscillator is connected : When the tape deck is connected :
Power on the unit. Power on the unit.
Set the input selector button of the unit to the "CD" Set the input selector button of the unit to the "TAPE
position. MONITOR" position.
While pressing both "+" and "-" of the surround While pressing both "+" and "-" of the surround
level adjustment button "SURROUND, press the level adjustment button "SURROUND, press the
"Power" button. "Power" button.
The letter SURROUND flash on the FL display. The letter SURROUND flash on the FL display.
A B
SA-EX310
A B
Run the tape deck
Run the CD player Run the AF oscillator
( QZZCLA )
315Hz, 0dB
( SZZP1054C/first program)
1kHz, 0dB ( Oscillator output )
at 500Hz, 200mV
Note: Connect the '+' probe of
Using the Oscilloscope, check the output waveforms at the test points on the oscilloscope to each
the circuit boards in the following order : test point and the ''
(C1,S1) (C2,S2) (C3,S3) (C4,S4) (C5,S5). probe to chassis ground.
To exit the service mode, power off the unit.
TEST POINTS POSITIONS OF SOURROUND CIRCUIT
MAIN P.C.B. ( component side )
C5 J246 PANEL P.C.B. ( component side )
S5 J245
S2
C551
+
C2
R552
C604
+ S4
J316
C3 C603
S3 + C4
J313
S1 J22
C1 J21
NORMAL WAVEFORMS OF AMPLIFIER CIRCUIT AND LIKELY FAULTY BLOCKS
Likely faulty block if the normal
TP CD player Tape deck AF oscillator waveform shown at the left is not
present.
C1 Dolby pro logic block
IC1001 and IC1002 & area
S1
0.5msec 1V 1msec 100mV 1msec 200mV
C2 Master volume block VR501 &
area
S2
0.5msec 200mV 1msec 20mV 1msec 50mV
C3 Tone control block IC551 & area
S3
0.5msec 200mV* 1msec 500mV 1msec 1V
SA-EX310
NORMAL WAVEFORMS OF AMPLIFIER CIRCUIT AND LIKELY FAULTY BLOCKS
Likely faulty block if the normal
TP CD player Tape deck AF oscillator waveform shown at the left is not
present.
C4 Power limiter block
Q551 to Q552 & area
S4
0.5msec 200mV* 1msec 500mV 1msec 1V
C5 Main amplifier block IC601 &
area IC602 & area
S5
0.5msec 5V* 1msec 10V 1msec 1V*
Measurement conditions.
Volume control (VR501), Tremble
control (VR512) and Bass control (VR511) positions :
*Volume control position (VR501) for these test :
CIRCUIT BLOCKS
OVERLOAD DETECTION FUNCTION
The HIC protection circuit functions if any cord at a speaker terminal is short-circuited or if the unit overheats because of i proper
m
operation. At the same time, OVERLOAD scrolls across the FL display.
In this state, all keys remain in operative; if any key is pressed, SWITCH OFF POWER scrolls across the FL display.
If an overload occurs, immediately power off the unit and check the speaker connection, venting holes and cooling fans. After
fixing any faults, power on the unit again and check for proper operation.
If no defects are found, or if the unit remains overload after it is power on again, check the circuit for faults.
SA-EX310
Block Diagram
SA-EX310
SA-EX310
SA-EX310
SA-EX310
Terminal Functions Of ICs
IC901 (M38B53M4053F) System Microprocessor
Pin Mark I/O Function Pin Mark I/O Function
No. No.
1~4 KEY4~KEY1 I Key matrix detect terminal 33~48 SEG16~SEG1 O FL segment signal output
5 THERM/OVLD I Thermal/Over load detect terminal 49~58 DEG1~DEG10 O FL digit signal output
6 FM_ST I Stereo signal detect terminal 59 INIT_IN I Diode input
7 6CH_ST Not used 60 VOL_DOWN O
Rotate control terminal of volume motor
8 RDS_ST Not used 61 VOL_UP O
9 REMOTE I Remote control terminal 62 LOUDNESS Not used
10 RESET I Reset detect terminal 63 IF_DATA I Serial data signal
11 RDS_CK Not used 64 REC_MUTE Not used
12 RDS_DT Not used 65 TNR_CE O Chip enable signal
13 GND GND terminal 66 SEL/TNR_CK O Serial clock signal
14 XIN I Crystal oscillator terminal 67 SEL/TNR_DT O Serial data signal
15 XOUT O (4 MHz) 68 SEL_ST O Level shift control terminal
16 VDD I Power supply terminal 69 OSD_ST Not used
17~21 SFC5~SFC1 O SFC LED indicator output 70 SURR/OSD_CK O Serial clock signal
22 HOLD I Power trip detection input 71 SURR/OSD_DT O Serial data signal
23 STANDBY_LED Not used 72 SURR_CE O Chip enable signal
24 FAN_STOP Not used 73 AVSS GND for A-D conveter
25 RLY O Power relay control output 74 VREF I Reference voltage for A-D convertion
26 TV/DVD I TV/DVD select control input 75 SD I SD signal detect input
27 LIMITTER O Power limitter control output 76 AC3_LED Not used
28 VEE I FL driver pull down voltage 77 HELP_LED O LED drive signal (HELP)
29 S/C_SP O Surround/center speaker control output 78 VIDEO_DET Not used
30 SP_B O Speaker B control output 79 VIDEO_B O Video selector controloutput B
31 SP_A O Speaker A control output 80 VIDEO_A O Video selector controloutput A
32 AF_MUTE O Muting control output
Terminal Guide of ICs, Transistors and Diodes
LA1832A NJM2279D TC9163AN 28Pin M5218P AN6558F BA6218
LC7218 UPC4570C
13 8
5
5
14 8
8
24 12 7 4
4 9
1
1 1 1
1 No.1
RSN307M44-P M38B53M4053F LA2786L 42Pin LV1016L 2SD2137PQTA 2SB1548PQAU
80 Pin 13 2SB1417PQTA 2SD2374PQAU
24 12
1
B
B C
26
18
C
E
E
28 No. 1 1
No.1
2SD592AQSTA 2SA933SSTA RVTDTA113ZST 2SC2787LTA STK311-010
2SA992EFTA 2SC1740SSTA RVTDTA114EST 2SC2785FETA
2SB621AQSTA RVTDTC143XST 2SC3311ARTA
2SC3940AQSTA RVTDTA143XST 2SD1915FTA
RVTDTC114YST BLUE
RVTDTA114YST B
C
B
C RVTDTA114EST E
E E
CB
SA-EX310
1N5402BM21 RVD1SS133TA MTZJ5R1BTA MTZJ9R1CTA LN846RPH
SB360L6508 Ca 1SR35200TB MTZJ5R6BTA MTZJ6R2BTA
Cathode MTZJ15CTA
Ca 1SS291TA MTZJ7R5CTA
MA165TA Ca
MTZJ6R8BTA
Cathode A MTZJ4R7BTA Anode
Cathode
A MTZJ3R9ATA A
A Cathode
MTZJ10CTA
Anode Anode MTZJ27DTA Ca
Anode MTZJ24DTA
Schematic Diagram
(All schematic diagrams may be modified at any time with the development of new technology)
Note :
S946 : Power switch S964 : VCR select switch
S947 : Phono select switch S970 : Search switch
S948 : Muting switch S971 : EON switch
S950 : FM Auto/ Mono switch S972 : PTY up switch
S951 : Band select switch S973 : PTY down switch
S952 : Tuning decrease switch S974 : Display mode switch
S953 : Tuning increase switch S980 : Speaker switch
S955 : Memory manual/auto switch S983 : Dolby Pro Logic/SFC off on switch
S956 : Preset decrease switch S984 : Dolby Pro Logic mode select switch
S957 : Preset increase switch S985 : Center mode select switch
S960 : Tuner select switch VR501-1 ~ VR501-4 : Volume control
S961 : CD select switch VR502 : Balance control
S962 : Tape select switch VR511-1 ~ VR511-2 : Bass control
S963 : TV/DVD select switch VR512-1 ~ VR512-2 : Treble control
Signal line
: +B line : AM signal line : FM signal line
: Main signal line : AM OSC signal line : FM OSC signal line
: B line : FM/AM signal line
Th