Sony XR-C543SP User manual

MICROFILM
XR-C543SP
East European Model
SERVICE MANUAL
FM/MW/LW CASSETTE CAR STEREO
SPECIFICATIONS
Model Name Using Similar Mechanism XR-C553SP
Tape Transport Mechanism Type MG-52A-135
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY”andthedouble-Dsymbolaaretrademarks
of Dolby Laboratories Licensing Corporation.
Power amplifier section
Outputs Speaker outputs
(sure seal connectors)
Speaker impedance 4 – 8 ohms
Maximum power output 35 W ×4 (at 4 ohms)
General
Outputs Power amplifier control
lead/Power aerial control
lead/Telephone mute
control lead
Line out (2)
Tone controls Bass ± 8 dB at 100 Hz
Treble ± 8 dB at 10 kHz
Power requirements 12 V DC car battery
(negative ground)
Dimensions Approx. 188 ×58 ×183 mm (w/h/d)
Mounting dimensions Approx. 182 ×53 ×164 mm (w/h/d)
Mass Approx. 1.6 kg
Supplied accessories Parts for installation and connections (1 set)
Rotary commander
RM-X2S
Design and specifications are subject to change without notice.
Cassette player section
Tape track 4-track 2-channel stereo
Wow and flutter 0.08% (WRMS)
Frequency response 30 – 20,000 Hz
Signal-to-noise ratio
Cassette type Dolby B NR Dolby NR off
TYPE II, IV 67 dB 61 dB
TYPE I 64 dB 58 dB
Tuner section
FM *
Turning range 65.0 – 74.0 MHz
(at 30 kHz step)
87.5 – 108.0 MHz
(at 50 kHz step)
Aerial terminal External aerial connector
Intermediate frequency 10.7 MHz
Usable sensitivity 8 dBf
Selectivity 75 dB at 400 kHz
Signal-to-noise ratio 65 dB (stereo),
68 dB (mono)
Harmonic distortion at 1 kHz
0.5% (stereo),
0.3% (mono)
Separation 35 dB at 1 kHz
Frequency response 30 – 15,000 Hz
Capture ratio 2 dB
* There are the numerical values mesured at 87.5 – 108.0 MHz.
MW/LW
Tuning range MW: 531 – 1,602 kHz
LW: 153 – 281 kHz
Aerial terminal External aerial connector
Intermediate frequency 10.71 MHz/450 kHz
Sensitivity MW: 30 µV
LW: 50 µV
Refer to RM-X2S/X3S SERVICE MANUAL (9-960-039-∏)
issued previously for information of remote commander
(RM-X2S) supplied with this set.

– 2 –
TABLE OF CONTENTS
1. GENERAL
Location of Controls ........................................................ 3
Installation ....................................................................... 4
Connections ..................................................................... 5
2. DISASSEMBLY.......................................................... 8
3. ASSEMBLY OF MECHANISM DECK ........... 11
4. MECHANICAL ADJUSTMENTS ....................... 17
5. ELECTRICAL ADJUSTMENTS
Test Mode ........................................................................ 17
Tape Deck Section ........................................................... 18
Tuner Section................................................................... 18
6. DIAGRAMS
6-1. IC Pin Function Description ............................................ 22
6-2. Printed Wiring Boards – MAIN Section – ..................... 25
6-3. Schematic Diagram – MAIN Section –........................... 29
6-4. Printed Wiring Board – POWER Section – .................... 34
6-5. Schematic Diagram – POWER Section –........................ 37
6-6. Printed Wiring Board – CONTROL Section – ............... 41
6-7. Schematic Diagram – CONTROL Section –................... 43
7. EXPLODED VIEWS ................................................ 47
8. ELECTRICAL PARTS LIST................................ 51
SERVICING NOTES
Flexible Circuit Board Repairing
•Keep the temperature of the soldering iron around 270 ˚C dur-
ing repairing.
•Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
•Be careful not to apply force on the conductor when soldering
or unsoldering
Notes on chip component replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by
the manufacturer.
Discard used batteries according to the manufacturer’s instructions.
ADVARSEL!
Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering.
Udskiftning må kun ske med batteri
af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandøren.
ADVARSEL
Eksplosjonsfare ved feilaktig skifte av batteri.
Benytt samme batteritype eller en tilsvarende type
anbefalt av apparatfabrikanten.
Brukte batterier kasseres i henhold til fabrikantens
instruksjoner.
VARNING
Explosionsfara vid felaktigt batteribyte.
Använd samma batterityp eller en likvärdig typ som
rekommenderas av apparattillverkaren.
Kassera använt batteri enligt gällande föreskrifter.
VAROITUS
Paristo voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin.
Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.

– 3 –
SECTION 1
GENERAL This section is extracted
from instruction manual.

– 4 –

– 5 –

– 6 –

– 7 –

– 8 –
Note: Follow the disassembly procedure in the numerical order given.
COVER
SECTION 2
DISASSEMBLY
COLLAR (A), HANDLE ASS’Y
3 screw
(PTT2.6 × 6)
3 screw
(PTT2.6 × 6)
1 Seven claws
4 handle ass’y
1 two screws
(PTT2.6 × 6)
3 Remove the cover
toward direction A .
2
A
2 coller (A)

– 9 –
FRONT PANEL ASS’Y
MECHANISM DECK
1 two claws
2 front panel ass’y
1 three claws
5 mechanism deck
3 two screws
(PTT2.6 × 6)
2 flexible board
(CNP301)
1 connector
(CNP331)
4 front chassis
3 three screws
(PTT2.6 × 6)

– 10 –
POWER BOARD
2 two connectors
(CNJ400,401)
3 power board
1 three screws
(PTT2.6 × 8)
1 two ground point
screws
4 antenna cable
2 ground point
screw
3 main board
MAIN BOARD

– 11 –
SECTION 3
ASSEMBLY OF MECHANISM DECK
Note: Follow the assembly procedure in the numerical order given.
ALIGNMENT OF FRONT SWITCH
1 Align ¢ mark on the rotary switch
the position shown in the figure.
chassis (S) ass’y
2 Align hole in the gear (LDG-D) with the
position shown in the figure.
hole
2 Install the gear (LDG-E).
1 Align hole as shown in the figure.
GEAR (LDGE)

– 12 –
CHASSIS (S) ASS’Y
LEVER (MODE)
2 screw (PS2 × 4)
1 chassis (S) ass’y
2 screw (PS2 × 4)
1. Align ¢ mark on the rotary switch with
hole in the lever (mode).
2. Fit on positions A , B and C and install
the lever (mode).
hole in lever (mode)
¢ mark on rotary switch
lever (mode)
rotary switch
A
B
C

– 13 –
LEVER (PINCH SELECTION)
HEAD PLATE ASS’Y
5 step screw (HP)
5 step screw (HP)
2 Fit shaft in groove.
ATS lever
1 Fit in groove.
3 Press the ATS lever.
4 Position the head plate sub
ass’y as shown in the figure.
groove
1 Align.
2 lever (pich selection)

– 14 –
LEVER (PINCH) ASS’Y
HOUSING
2 Install the hanger on to
two claws of the housing.
1 Install the catch to the hanger.
7 Holder the hanger by bending the claw.
A part
B part
C part
D part
8 Holder the hanger by
bending the claw.
3 Put the housing
under A part.
4 Fit claws on B part.
6 Fit projections on D part.
5 Fit projections on C part.
hanger
1 Fit shaft of the lever (Pinch) ass’y
in hole on the chassis (M) ass’y and
install the lever (pinch) ass’y.
2 two polyethylene washers
shaft
shaft
B
C
C
B
shaft A
3 Install the spring (pinch press) to
shaft A .
Set the ends of spring to B and C .

– 15 –
1 Fit the lever (LDG-A)
on shaft A – C and install it.
shaft A
shaft B
shaft C
3 two type-E stop ring 2.0
2 Fit the lever (LDG-B)
on shafts A and B and
install.
shaft A
shaft B
LEVER (LDG-A) / (LDG-B)
ARM (SUCTION)
2 Move the arm (suction) in the arrow
direction and fit on projection.
1 Fit the arm (suction) on the shaft.
projection

– 16 –
GEAR (LDG-FT)
2 guide (C)
1 three claws
4 Align hole in the gear (LDG-D) with
¢ mark on the lever (LDG-A).
hole
gear (LDG-D)
gear (LDG-A)
3 Move the lever (LDG-B)
in the arrow direction.
1 gear (LDG-A)
2 tension spring (lever LDG)
5 gear (LDG-FT)
6 polyethylene washer
GUIDE (C)
gear (LDG-FB)

– 17 –
SECTION 5
ELECTRICAL ADJUSTMENTS
TEST MODE
This set have the test mode function. In the test mode, FM Auto
Scan/Stop Level and MW Auto Scan/Stop Level adjustments can
be performed easier than it in ordinary procedure.
<Set the Test Mode>
1. Set the “OFF” mode.
2. Push the preset 4 button.
3. Push the preset 5 button.
4. Press the preset 1 button for more than two seconds.
5. Push the SOURCE button, the test mode is set.
display
1. Clean the following parts with a denatured-alcohol-moistened
swab: playback head pinch roller
rubber belt capstan
idler
2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the power supply
voltage (14.4V) unless otherwise noted.
•Torque Measurement
SECTION 4
MECHANICAL ADJUSTMENTS
Mode Torqu Meter Meter Reading
Forward CQ-403A more than 60 g
Reverse CQ-403R (more than 2.12 oz)
•Tape Tension Measurement
Mode Torqu Meter Meter Reading
Forward CQ-102C 35–65 g•cm
(0.49–0.90 oz•inch)
Forward CQ-102C 0.5–5.0 g•cm
Back Tension (0.01–0.07 oz•inch)
Reverse CQ-102RC 35–65 g•cm
(0.49–0.90 oz•inch)
Reverse CQ-102RC 0.5–5.0 g•cm
Back Tension (0.01–0.07 oz•inch)
FF, REW CQ-201B 60–200 g•cm
(0.83–2.78 oz•inch)
FM
98.0

SHUF1
<Release the Test mode>
1. Push the “OFF” button.

– 18 –
TUNER SECTION 0 dB=1 µV
Cautions during repair
When the tuner unit is defective, replace it by a new one be-
cause its internal block is difficult to repair.
FM Auto Scan/Stop Level Adjustment
Setting:
SOURCE button: FM
See the adjustment location from on page 21 for the
adjustment.
0 dB=0.775 VTAPE DECK SECTION
Tape Speed Adjustment
Procedure:
1. Put the set into the FWD PB mode.
Speed checker Frequency counter
–1.5 to +2.5% 2,955 to 3,075 Hz
Specification: Constant speed
Adjustment Location: See page 21.
DOLBY Level Adjustment
Setting:
Preset 3 (DOLBY) button : OFF
SEL (BAS) button : Center
SEL (TRE) button : Center
SEL (BAL) button : Center
SEL (FAD) button : Center
SEL (VOL) button : Maximum
D-BASS control : OFF
test tape
WS-48A
(3 kHz, 0 dB)
LINE OUT
set
FM RF signal
generator
antenna jack
0.01 µF
Carrier frequency : 98.0 MHz
Output level : 20 dB (10.0 µV)
Mode : mono
Modulation : 1 kHz, 22.5 kHz deviation (30%)
Procedure:
1. Set to the test mode. (See page 17).
Display
10 k Ω
set +–
speed checker
or
frequency counter
Procedure:
1. Put the set into the FWD PB mode.
2. Adjust RV121 (L-CH) and RV221 (R-CH) so that the level
meter reading is –6 ± 0.5 dB (0.37 to 0.41 V).
Adjustment Location: See page 21.
main board



L-CH:TP101 (DOLBY-L)
R-CH:TP201 (DOLBY-R)
set +
–
level mete
r
test tape
P-4-D400
(400 Hz, 0 dB)
FM
98.0
SHUF1
2. Push the preset 3 button.
Display
3. Adjust with the volume RV2 on TU1 so that the “FM” indica-
tion turns to “FM0” indication on the display window.
But, in case of already indicated “FM0”, turn the RV2 so that
put out light “0” indication and adjustment.
Display
Adjustment Location: See page 21.
98.0

3SHUF1
FM
98.0

3SHUF1
FM

– 19 –
FM Stereo Separation Adjustment
Setting:
SOURCE button: FM
MW Auto Scan/Stop Level Adjustment
Setting:
SOURCE and MODE button: MW
L-CH Stereo separation: A-B
R-CH Stereo separation: C-D
The separations of both channels should be equal.
Specification: Separation more than 26 dB
Adjustment Location: See page 21.
FM RF signal
generator
set +
–
level mete
r
antenna jack
10 k Ω
LINE OUT
Carrier frequency : 98.0 MHz
Output level : 70 dB (3.2 mV)
Mode : stereo
Modulation : main: 1 kHz, 33.75 kHz deviation (45%)
sub: 1 kHz, 33.75 kHz deviation (45%)
19 kHz pilot: 7.5 kHz deviation (10%)
Procedure:
FM Stereo Level meter Level meter
signal generator connection reading (dB)
output channel
L-CH L-CH A
B
R-CH L-CH Adjust RV4 on TU1
for minimum reading.
R-CH R-CH C
D
L-CH R-CH Adjust RV4 on TU1
for minimum reading.
AM RF signal
generator
set
30 Ω
15 pF
65 pF
AM dummy antenna
(50 Ω )
antenna jack
Carrier frequency : 999 kHz
30% amplitude
modukation by
1 kHz signal
Output level : 33 dB (44.7 µV)
999
SHUF1
MW
4. Adjust with the volume RV1 on TU1 so that the “MW” indi-
cation turns to “MW0” indication on the display window.
But, in case of already indicated “MW0”, turn the RV1 so that
put out light “0” indication and adjustment.
Display
Adjustment Location: See page 21.
3. Push the preset 3 button.
Display
Procedure:
1. Set to the test mode. (See page 17.)
2. Push the MODE button and set to MW.
Display
999

3SHUF1
MW
3999
SHUF1
MW

– 20 –
FM Polar VCO Adjustment
Setting:
SOURCE button: FM
FM Polar Pilot Adjustment
Setting:
SOURCE button: FM
set
FM RF signal
generator
antenna jack
Carrier frequency : 69.5 MHz (FM2: 3CH)
Output level : 60 dB (1 mV)
    
TP401 (VCO)
main board frequency counter
+
–
Procedure:
1. Connect the frequency counter to the TP401 (VCO) on main
board.
2. Adjust RV402 so that the reading on the frequency counter
becomes to 31.25 ± 0.1 kHz.
Adjustment Location: See page 21.
set
FM RF signal
generator
antenna jack
Carrier frequency : 69.5 MHz (FM2: 3CH)
Output level : 60 dB (1 mV)
Procedure:
1. Connect the level meter to the TP402 (PLT) on main board.
2. Set the modulation frequency of the FM RF signal generator
to 1 kHz (10 kHz div.)
3. Then output level is supposing that 0 dB.
4. Set the modulation frequency of the FM RF signal generator
to 31.25 kHz (10 kHz div.).
5. Adjust L401 so tha the reading on the level meter becomes to
maximum.
6. Adjust RV401 so that the reading on the level meter becomes
to 13.0 ± 0.5 dB.
Adjustment Location: See page 21.
    
TP402 (PLT)
main board level meter
+
–