Sony XR-C6103SP User manual
MICROFILM
SERVICE MANUAL
FM/MW/LW CASSETTE CAR STEREO
East European Model
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MG-25F-136
SPECIFICATIONS
XR-C6103SP
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol aare trademarks
of Dolby Laboratories Licensing Corporation.
– Continued on next page –
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TEL 13942296513 QQ 376315150 892498299
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– 2 –
TABLE OF CONTENTS
1. GENERAL ................................................................... 3
2. DISASSEMBLY ......................................................... 9
3. ASSEMBLY OF MECHANISM DECK........... 11
4. MECHANICAL ADJUSTMENTS ....................... 14
5. ELECTRICAL ADJUSTMENTS
Test Mode ........................................................................ 14
Tape Deck Section .......................................................... 14
Tuner Section .................................................................. 15
6. DIAGRAMS
6-1. IC Pin Function Description ........................................... 19
6-2. Printed Wiring Board – MAIN Section – ...................... 23
6-3. Schematic Diagram – MAIN Section –.......................... 27
6-4. Printed Wiring Board – PANEL Section –.................... 31
6-5. Schematic Diagram – PANEL Section – ....................... 33
7. EXPLODED VIEWS................................................ 38
8. ELECTRICAL PARTS LIST ............................... 41
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.
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TEL 13942296513 QQ 376315150 892498299
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– 9 –
FRONT PANEL ASS’Y
COVER ASS’Y
Note: Follow the disassembly procedure in the numerical order given.
SECTION 2
DISASSEMBLY
1
Push the button
(release)
2
Remove the front panel ass’y
to the direction of the arrow
A
.
A
3
cover ass’y
1
2
2
1
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TEL 13942296513 QQ 376315150 892498299
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– 10 –
5
eight screws
(PTT2.6
×
10
)
1
screw
(PTT2.6
×
6)
1
two screws
(PTT2.6
×
6)
6
heat sink
2
rubber cap (25)
4
main board
3
two ground point
screws
SUB PANEL, MECHANISM DECK (MG-25F-136)
MAIN BOARD, HEAT SINK
5
screw
(PTT2.6
×
6)
6
mechanism deck
(MG-25F-136)
4
flexible flat cable
(CNP301)
3
connector
(CNP331)
1
three screws
(PTT2.6
×
6)
1
three screws
(PTT2.6
×
6)
2
sub panel
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TEL 13942296513 QQ 376315150 892498299
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– 11 –
SECTION 3
ASSEMBLY OF MECHANISM DECK
Note: Follow the assembly procedure in the numerical order given.
HOUSING
ARM (SUCTION)
A
part
C
part
B
part
D
part
8
Hold the hanger by
bending the claw.
6
Fit projection on
D
part.
4
Fit claw on
B
part.
3
Put the housing
under
A
part.
5
Fit projection on
C
part.
1
Install the catch to the hanger.
2
Install the hanger onto
two claws of the housing.
7
Holder the hanger by bending the claw.
hanger
housing
2
Move the arm (suction) in the arrow
direction and fit on projection.
1
Fit the arm (suction) on the shaft.
projection
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TEL 13942296513 QQ 376315150 892498299
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– 12 –
LEVER (LDG-A) / (LDG-B)
GEAR (LDG-FT)
shaft
A
shaft
B
shaft
C
1
Fit the lever (LDG-A) on
shafts
A
–
C
and install it.
shaft
A
shaft
B
2
Fit the lever (LDG-B) on
shafts
A
and
B
and
install it.
3
type-E stop ring 2.0
gear (LDG-D)
5
gear (LDG-FT)
6
polyethylene washer
2
tension spring (LD-2)
2
tension spring (LD-1)
gear (LDG-FB)
lever (LDG-A)
hole
hole
4
Align hole in the gear (LDG-D)
with hole the lever (LDG-A)
3
Move the lever (LDG-B)
in the arrow direction.
1
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TEL 13942296513 QQ 376315150 892498299
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– 14 –
SECTION 4
MECHANICAL ADJUSTMENTS SECTION 5
ELECTRICAL ADJUSTMENTS
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. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the power supply
voltage unless otherwise noted.
•Torque Measurement
Mode Tension Meter Meter Reading
Forward CQ-403A more than 90 g
(more than 3.18 oz)
Reverse CQ-403R more than 90 g
(more than 3.18 oz)
•Tape Tension Measurement
Mode Torque Meter Meter Reading
Forward CQ-102C 30 - 65 g•cm
(0.42 - 0.90 oz•inch)
Forward CQ-102C 0.5 - 4.5g•cm
Back Tension (0.01 - 0.06 oz•inch)
Reverse CQ-102RC 30 - 65 g•cm
(0.42 - 0.90 oz•inch)
Reverse CQ-102RC 0.5 - 4.5g•cm
Back Tension (0.01 - 0.06 oz•inch)
FF, REW CQ-201B 60 - 200 g•cm
(0.83 - 2.78 oz•inch)
TEST MODE
This set have the test mode function. In the test mode, FM Auto
Scan/Stop Level and AM (MW)Auto Scan/Stop Level adjustments
can be performed easier than it in ordinary procedure.
<Set the Test Mode>
1. Set the “power select” switch (S701) is “A (ON) ” position.
2. Turn ON the regulated power supply. (All LEDs on the set
lights up, and the clock is displayed.)
Note: Press the [OFF] button, if the clock is not displayed.
3. Push the preset [4] button.
4. Push the preset [5] button.
5. Press the preset [1] button for more than two seconds.
6. Then the display indicates all lights, the test mode is set.
<Release the Test mode>
1. Push the [OFF] button.
2. Return the “power select” switch (S701) to initially set position.
See the adjustment location from on page 18 for the
adjusutment.
TAPE DECK SECTION 0 dB=0.775 V
Tape Speed Adjustment
Setting:
Procedure:
1. Put the set into the FWD PB mode.
2. Adjust adjustment resistor for inside capstan motor so that the
reading on the speed checker or frequency counter becomes in
specification.
Specification: Constant speed
Adjustment Location: See page 18.
set +–
test tape
WS-48A
(3 kHz, 0 dB)
LINE OUT
10 k
Ω
speed checker
or
frequency counter
Speed checker Frequency counter
–1.5 to +2.5% 2,955 to 3,075Hz
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TEL 13942296513 QQ 376315150 892498299
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– 15 –
DOLBY Level Adjustment
Setting:
Preset [3] (DOLBY) button : NR 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
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 ± 1 dB (0.35 to 0.43 V).
Adjustment Location: See page 18.
TUNER SECTION 0 dB=1 µV
Cautions during repair
When the tuner unit is defective, replace it by a new one because
its internal block is difficult to repair.
Note: Adjust the tuner section in the sequence shown below.
1. FM Auto Scan/Stop Level Adjustment
2. FM Stereo Separation Adjustment
3. AM (MW) Auto Scan/Stop Level Adjustment
4. FM POLAR Adjustment
FM Auto Scan/Stop Level Adjustment
Setting:
[SOURCE] button: FM
Procedure:
1. Set to the test mode. (See page 14).
2. Push the [SOURCE] button and set to FM.
Display
3. Push the preset [3] button.
Display
4. 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 18.
set +
–
test tape
P-4-D400
(400 Hz, 0 dB)
MAIN board
level mete
r
MAIN board
TP (DOLBY L)/
TP (DOLBY R)
TP (GND)
FM RF signal
generator
Carrier frequency : 98.0 MHz
Output level : 22 dB (12.6
µ
V)
Mode : mono
Modulation : 1 kHz, 22.5 kHz deviation (30%)
0.01
µ
F
set
antenna jack (J1)
FM
SHUF1
FM
SHUF1
SHUF1
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TEL 13942296513 QQ 376315150 892498299
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– 16 –
FM Stereo Separation Adjustment
Setting:
[SOURCE] button: FM
Procedure:
L-CH Stereo separation: A-B
R-CH Stereo separation: C-D
The separations of both channels should be equal.
Specification: Separation more than 28 dB
Adjustment Location: See page 18.
FM RF signal
generator
Carrier frequency : 98.0 MHz
Output level : 70 dB (3.2 mV)
Mode : stereo
Modulation : main: 1 kHz, 20 kHz deviation (26.7%)
sub: 1 kHz, 20 kHz deviation (26.7%)
19 kHz pilot: 7.5 kHz deviation (10%)
0.01
µ
F
set
antenna jack (J1)
+
–
LINE OUT
level meter
10 k
Ω
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 (MW) Auto Scan/Stop Level Adjustment
Make this adjustment after “FMAuto Scan/Stop LevelAdjustment”.
Setting:
[SOURCE] and [MODE] button: MW
Procedure:
1. Set to the test mode. (See page 14.)
2. Push the [SOURCE] button and set to FM.
3. Push the [MODE] button and set to MW.
Display
4. Push the preset [3] button.
Display
5. 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 18.
AM RF signal
generator
Carrier frequency : 999 kHz
30% amplitude
modulation by
1 kHz signal
Output level : 33 dB (44.7
µ
V)
(50
Ω
)set
AM dummy antenna
30
Ω
15 pF
65 pF
antenna jack (J1)
999
MW
SHUF1
999
MW
SHUF1
3
999 SHUF1
3
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TEL 13942296513 QQ 376315150 892498299
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– 17 –
FM Polar VCO Adjustment
Setting:
[SOURCE] button: FM
Procedure:
1. Tune the set to 69.5 MHz, and set the internal modulation level
of the FM RF signal generator to 10 kHz deviation (20%).
2. Connect the frequency counter to the TP (VCO) on MAIN
board.
3. Adjust RV402 so that the reading on the frequency counter
becomes to 31.25 ± 0.1 kHz.
Adjustment Location: See page 18.
FM Polar Pilot Adjustment
Setting:
[SOURCE] button: FM
Procedure:
1. Connect the level meter to the TP (PLT) on MAIN board.
2. Set the modulation frequency of the FM RF signal generator
to 1 kHz, 40 kHz deviation (80 %)
3. Then output level is supposing that (A) dB.
4. Set the modulation frequency of the FM RF signal generator
to 31.25 kHz, 10 kHz deviation (20%)
5. Adjust L401 so that the reading on the level meter becomes to
maximum.
6. Adjust RV401 so that the reading on the level meter becomes
to (A) + 13.0 dB ± 0.5 dB.
Adjustment Location: See page 18.
set
FM RF signal
generator
antenna jack (J1)
Carrier frequency : 69.5 MHz
Output level : 66 dB (1.995 mV)
TP (VCO)
MAIN board frequency counter
+
–
set
FM RF signal
generator
antenna jack (J1)
Carrier frequency : 69.5 MHz
Output level : 66 dB (1.995 mV)
TP (PLT)
MAIN board level meter
+
–
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TEL 13942296513 QQ 376315150 892498299
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– 18 –
– MAIN BOARD (CONDUCTOR SIDE) –
– SET UPPER VIEW –
TP
(VCO)
TU1
IC401
J1
antenna jack
TP
(PLT) TP (DOLBY R)
TP (GND)
TP (DOLBY L) S701
power select
switch
A
(ON)
↑
B
(OFF)
Tape Speed Adjustment
RV4 FM Stereo Separation Adjustment
RV221
(R-CH) RV121
(L-CH)
DOLBY Level
Adjustment
RV2 FM Auto Scan/Stop Level Adjustment
RV1 AM (MW) Auto Scan/Stop Level Adjustment
TU1
Sub Carrier Adjustment
RV402 VCO Frequency Adjustment
RV401
L401
Adjustment Location:
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TEL 13942296513 QQ 376315150 892498299
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– 19 –
SECTION 6
DIAGRAMS
•MAIN BOARD IC701 µPD78058GC-F36-3B9 (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Function
1 DSEL I Destination setting terminal (fixed at center voltage)
2 RCIN0 I Rotary remote commander shift key A/D input terminal
3 SD IN I Station detector detect input from the FM/AM tuner unit (TU1)
Stop level for SEEK, BTM, etc. is determined SD is present at input of “H”
4 AVSS — Ground terminal (for A/D converter)
5 ST I/O
6 PLLCE O PLL serial chip enable output to the FM/AM PLL (IC31)
7 AVREF1 I Reference voltage (+5V) input terminal (for D/A converter)
8 PLLSI I PLL serial data input from the FM/AM PLL (IC31)
9 PLLSO O PLL serial data output to the FM/AM PLL (IC31)
10 PLLCKO O PLL serial data transfer clock signal output to the FM/AM PLL (IC31)
11 P-STIN I Polar stereo signal input from the polar multiplexer (IC401)
12 LCDSO O Serial data output to the liquid crystal display driver (IC901)
13 LCDCKO O Serial data transfer clock signal output to the liquid crystal display driver (IC901)
14 LCDCE O Chip enable output to the liquid crystal display driver (IC901)
15 LCDINH O Blank indicate control signal output to the liquid crystal display driver (IC901)
“L”: no display
16 UNISI I Serial data input from the bus interface (IC571) (for SONY bus)
17 UNISO O Serial data output to the bus interface (IC571) (for SONY bus)
18 UNICKI I Serial data reading clock signal input terminal (for SONY bus)
19 UNICKO O Serial data transfer clock signal output to the bus interface (IC571) (for SONY bus)
20 BUSON O Bus on/off control signal output to the bus interface (IC571) (for SONY bus) “L”: bus on
21 SYSRST O Reset signal output to the bus interface (IC571) (for SONY bus) “L”: reset
22 AMPON O Standby control signal output to the power amplifier (IC471) “L”: standby
23 AMPMUTE O Muting control signal output to the power amplifier (IC471) “L”: muting on
24 TUNON O Tuner system power supply on/off control signal output to the BA3918 (IC601) “H”: tuner on
25 FM ON O FM system power supply on/off control signal output to the BA3918 (IC601) “H”: FM on
26 PW ON O Main system power supply on/off control signal output to the BA3918 (IC601) “H”: power on
27 COLOR I Input terminal to set whether the illumination color change function is present or not
“L”: illumination color change function is present (fixed at “L”)
28 AMS ON O Tape auto music sensor control signal output to the CXA2510Q (IC321)
“L” is output to lower the gain for audio level at FF/REW
29 REL I Reel table rotation detect signal input from the take-up and supply reel sensor
30 MTLIN I Input terminal to set whether the auto metal function is present or not
“L”: auto metal function is present Not used this function in this set (fixed at “H”)
31 POS3 I
32 POS2 I
33 GND — Ground terminal
34 POS0 I
35 POS1 I
36 LM LOD O Loading/tape operation motor control signal output to the LB1638M (IC651)
(For the loading direction and forward side operation) *1
37 LM EJ O Loading/tape operation motor control signal output to the LB1638M (IC651)
(For the eject direction and reverse side operation) *1
Tape position detect input from the tape operation switch on the mechanism block
Tape position detect input from the tape operation switch on the mechanism block
Input of FM stereo detection signal from FM/AM tuner unit (TU1), and output of forced
monaural control signal to FM/AM tuner unit (TU1) (Commonly used for stereo display input
and forced monaural output)
FM stereo detection at input of “L”, forced monaural at output of “L”
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
– 20 –
Pin No. Pin Name I/O Function
38 N/R OUT O Forward/reverse direction control signal output to the CXA2510Q (IC321)
“L: forward direction, “H”: reverse direction
39 NC I Not used (fixed at “H”)
40 CMON O Capstan/reel motor (M901) drive signal output terminal “H”: motor on
41 TAPEON O Tape system power supply on/off control signal output terminal “H”: tape on
42 COLSEL I Setting terminal for the illumination color “L”: amber, “H”: green (fixed at “H”)
43 RCIN1 I Rotary remote commander shift key A/D input terminal
44 TEST I Setting terminal for the test mode “L”: test mode (normally fixed at “H”)
45 ILLON O
46 BEEP O Beep sound output terminal
47 MUTE O Line muting control signal output terminal “H”: line muting on
48 VOLCE O Chip enable signal output to the electrical volume (IC351)
49 SUBCE O Chip enable signal output terminal Not used in this set (open)
50 VOLCKO O Serial data transfer clock signal output to the electrical volume (IC351)
51 SUBCKO O Serial data transfer clock signal output terminal Not used in this set (open)
52 VOLSO O Serial data output to the electrical volume (IC351)
53 TAPMUT O Tape muting on/off control signal output to the CXA2510Q (IC321) “H”: tape muting on
54 DOLON I/O
55 DOLBC I/O
56 AMSIN I Whether a music is present or not from CXA2510Q (IC321) is detected at auto music sensor
“L”: music is present, “H”: music is not present
57 MTLSEL I/O
58 AD ON O Power supply on/off control signal output for the A/D converter “L”: power on
59 RAMBU I
60 RESET I System reset signal input from the reset signal generator (IC551)
“L” is input for several 100 msec after power on, then it changes to “H”
61 SIRCS I Sircs signal input terminal Not used in this set (fixed at “H”)
62 BUIN I Battery detect signal input terminal “H”: battery on
63 PW SEL I Power select switch (S701) input terminal “L”: off (halt mode), “H”: on (operation mode)
64 ACCIN I Accessory detect signal input terminal “L”: accessory on
65 NOSESW I Detects the removal of the attaching and removing type front panel block “L”: attaching
66 TELMUTE I Telephone muting signal input terminal At input of “L”, the signal is attenuated by –20 dB
67 KEYACK I Input of acknowledge signal for the key entry Acknowledge signal is input to accept function
and eject keys in the power off status On at input of “L”
Internal RAM reset detection signal input from the RN5VD23AA (IC552)
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset
Power supply on/off control signal output terminal at the illumination and liquid crystal display
driver (IC901) “H”: power on
At power select switch (S701) on mode: “H” output at the accessory on
At power select switch (S701) off mode: “H” output at the power on
Dolby control in/out terminal
At initial mode: valid/invalid selection input of dolby function (“L” input: valid)
At normal mode: dolby on/off control signal output to the CXA2510Q (IC321)
“H”: dolby on
Dolby B/C selection control in/out terminal
At initial mode: dolby B only/dolby B and C type selection input (“L” input: dolby B and C)
At normal mode: dolby type selection signal output “L”: dolby B, “H”: dolby C
Not used this function (fixed at “H”)
METAL control in/out terminal
At initial mode: auto/manual mode selection input of METAL function “L”: manual mode
At manual mode: METAL on/off control signal output to the CXA2510Q (IC321)
“H”: METAL on
At auto mode: input at MTLIN (pin #º)
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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