Sony XR-C8200 User manual

MICROFILM
SERVICE MANUAL
FM/AM CASSETTE CAR STEREO
US Model
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MG-25D-136
SPECIFICATIONS
XR-C8200
Dolby noise reduction manufactured under license
form Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol aare trade-
marks of Dolby Laboratories Licensing Corporation.
For RM-X2S (Remote Commander),
please refer to RM-X2S/X3S Service
Manual(9-960-039-∏)previouslyissued.

– 2 –
TABLE OF CONTENTS
1. GENERAL
Location of Controls ....................................................... 3
Resetting the Unit ........................................................... 4
Detaching the Font Panel ................................................ 4
Preparing the Rotary Commander .................................. 4
Setting the Clock ............................................................. 4
Installation....................................................................... 5
Connections ..................................................................... 6
2. DISASSEMBLY ......................................................... 8
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 ........................................... 18
6-2. Printed Wiring Board – MAIN Section – ...................... 25
6-3. Schematic Diagram – MAIN Section –.......................... 29
6-4. Printed Wiring Boards – PANEL Section – .................. 33
6-5. Schematic Diagram – PANEL Section –....................... 35
7. EXPLODED VIEWS................................................ 41
8. ELECTRICAL PARTS LIST ............................... 44
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.

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

– 4 –

– 5 –

– 6 –

– 7 –

– 8 –
COVER ASS’Y
FRONT PANEL ASS’Y
Note: Follow the disassembly procedure in the numerical order given.
SECTION 2
DISASSEMBLY
1 claw
3 cover ass’y
2 three claws
1 claw
4 front panel ass’y
3 Push the bearing (L).
2 Push the bearing (R).
1 Push the button (OPEN).

– 9 –
SUB PANEL ASS’Y
MECHANISM DECK (MG-25D-136)
5 claw
4 two claws
1 screw
(PTT2.6
× 8
)
6 sub panel ass’y
2 two screws
(PTT2.6
× 8)
3 two screws
(PTT2.6
× 8)
3 flexible flat cable
(
CN231
)
4 mechanism dec
k
(MG-25D-136)
1 two screws
(2.6
× 6)
2 connector
(CN201)

– 10 –
HEAT SINK
MAIN BOARD
4 insulator
3 main boar
d
1 ground point screw
2 two ground point screws
1 connector
(CN302)
6 two screws
(PTT2.6 × 8)
2 screw
(PTT2.6 × 8)
3 cord (with connector)
(SUB w. out)
4 four screws
(PTT2.6 × 8)
5 three screw
s
(PTT2.6 × 8)
7 screw
(PTT2.6 × 8)
8 heat sink

– 11 –
HOUSING
ARM (SUCTION)
Note: Follow the assembly procedure in the numerical order given.
SECTION 3
ASSEMBLY OF MECHANISM DECK
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

– 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

– 13 –
2 guide (C)
1 three claws
GUIDE (C)

– 14 –
SECTION 4
MECHANICAL ADJUSTMENTS
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)
•TapeTension Measurement
1. Clean the following parts with a denatured-alcohol-moistened
swab:
playback head pinch roller
rubber belt capstan
idles
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 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)
SECTION 5
ELECTRICAL ADJUSTMENTS
TEST MODE
This set have the test mode function. In the test mode, FM Auto
Scan/Stop Level and AM Auto Scan/Stop Level adjustments can
be performed easier than it in ordinary procedure.
<Set the Test Mode>
1. Set the “power select” switch (S501) 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 (S501) to initially set posi-
tion.
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 17.
See the adjustment location from on page 17 for the
adjustment.
0 dB=0.775 V
TAPE DECK SECTION
set +–
test tape
WS-48A
(3 kHz, 0 dB)
speaker out terminal
4 Ω
speed checker
or
frequency counter
Speed checker Frequency counter
–1.5 to +2.5% 2,955 to 3,075 Hz

– 15 –
Dolby Level Adjustment
setting:
[SHIFT] button : ON (light up SET UP
and PLAY MODE)
Preset [3] (PLAY MODE) button : NR off
SOUND (BAS) button : Center
SOUND (TRE) button : Center
SOUND (BAL) button : Center
SOUND (FAD) button : Center
SOUND (VOL) button : Maximum
Procedure:
1. Put the set into the FWD PB mode.
2. Adjust RV251 (L-CH) and RV261 (R-CH) so that the level
meter reading is – 6 ± 0.5 dB (0.37 to 0.41 V).
Adjustment Location: See page 17.
level mete
r
test tape
P-4-D400
(400 Hz, 0 dB)
set
TP (DOLBY-L)/
TP (DOLBY-R)
+
–
MAIN board
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. Adjust with the volume RV2 on TU11 so that the “FM” indi-
cation 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 17.
TUNER SECTION 0 dB=1µV
Cautions during repair
When the tuner unit is defective, replace it by a new one be-
cause its internal block is difficult to repair.
Note:
Adjust the tuner section in the sequence shown below.
1. FM Auto Scan/Stop LevelAdjustment
2. FM Stereo Separation Adjustment
3. AM Auto Scan/Stop Level Adjustment
FM RF signal
generator
Carrier frequency : 97.9 MHz
Output level : 22 dB (12.6
µ V)
Mode : mono
Modulation : 1 kHz, 22.5kHz deviation (30%)
0.01 µ F
set
antenna jack (CN11)
SHUF1
SHUF1

– 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 17.
FM RF signal
generator
Carrier frequency : 97.9 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%)
0.01 µ F
set
antenna jack (CN11)
+
–
speaker out terminal
level meter
4
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 TU11
for minimum reading.
R-CH R-CH C
D
L-CH R-CH Adjust RV4 on TU11
for minimum reading.
AM Auto Scan/Stop Level Adjustment
Setting:
[SOURCE] →[MODE] button : AM
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 AM .
Display
4. Adjust with the volume RV1 on TU11 so that the “AM” indi-
cation turns to “AM0” indication on the display window.
But, in case of already indicated “AM0”, turn the RV1 so that
put out light “0” indication and adjustment.
Display
Adjustment Location: See page 17.
AM RF signal
generator
Carrier frequency : 1000 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 (CN11)
SHUF1
SHUF1

– 17 –
Adjustment Location :
Tape speed Adjustment
– SET UPPER VIEW –
RV1 AM Auto Scan/Stop Level Adjustment
RV2 FM Auto Scan/Stop Level Adjustment
RV4 FM Stereo Separation Adjustment
TU11
RV261 RV251
(R-CH) (L-CH)
Dolby
Level
Adjustment
R-CH
L-CH
— SET BOTTOM VIEW —
TP (DOLBY)
Dolby
Level
Adjustment

– 18 –
SECTION 6
DIAGRAMS
•MAIN BOARD IC101 µPD78013GC-761-AB8 (TUNER CONTROLLER)
Pin No. Pin Name I/O Function
1 TUNON O Tuner system power supply on/off control signal output to the BA3918 (IC601) “H”: tuner on
2 FM ON O FM system power supply on/off control signal output to the BA3918 (IC601) “H”: FM on
3 to 8 NCO O Not used (open)
9 VSS — Ground terminal
10 to 23 NCO O Not used (open)
24 VSS — Ground terminal
25 to 32 NCO O Not used (open)
33 TUNMUT O FM and AM signal muting on/off control output “H”: muting on
34 RAMBU I
35 RESET I System reset signal input from the system controller (IC501), reset signal generator (IC551) and
reset switch (S551) “L” is input for several 100 msec after power on, then it changes to “H”
36 NCO O Not used (open)
37 BU IN I Battery detect signal input from the SONY bus interface (IC571) and battery check circuit
“H”: battery on
38 NCO O Not used (open)
39 BUSON I Bus on/off control signal input from the system controller (IC501) (for SONY bus)
“L”: bus on
40 VDD — Power supply terminal (+5V)
41 OSCOUT O Main system clock output terminal (8 MHz)
42 OSCIN I Main system clock input terminal (8 MHz)
43 GND — Ground terminal
44 XT OUT O Sub system clock output terminal Not used (pull down)
45 XT IN I Sub system clock input terminal Not used (fixed at “L”)
46 AVSS — Ground terminal (for A/D converter)
47 VSM I FM and AM signal meter voltage detection input from the FM/AM tuner unit (TU11)
48 DSTSEL1 I Destination setting terminal (fixed at “L”)
49 DSTSEL0 I Destination setting terminal (fixed at “H”)
50 SD IN I Station detector detect input from the FM/AM tuner unit (TU11)
Stop level for SEEK, BTM, etc. is determined SD is present at input of “H”
51 ST MONO I/O
52 to 54 NIL I Not used (fixed at “L”)
55 AVDD — Power supply terminal (+5V) (for A/D converter)
56 AVREF I Reference voltage input terminal (+5V) (for A/D converter)
57 PLL SI I PLL serial data input from the FM/AM PLL (IC91)
58 PLL SO O PLL serial data output to the FM/AM PLL (IC91)
59 PLLCKO O PLL serial data transfer clock signal output to the FM/AM PLL (IC91)
60 PLLCE O PLL serial chip enable output to the FM/AM PLL (IC91)
61 LINKOFF O Unilink on/off control signal output (for SONY bus) “L”: link off
62 UNISI I Serial data input from the SONY bus interface (IC571)
63 UNISO O Serial data output to the SONY bus interface (IC571)
64 UNICKI I Serial data reading clock signal input from the system controller (IC501) (for SONY bus)
Input of FM stereo detection signal from FM/AM tuner unit (TU11), and output of forced
monaural control signal to FM/AM tuner unit (TU11) (Commonly used for stereo display input
and forced monaural output)
FM stereo detection at input of “L”, forced monaural at output 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
6-1. PIN FUNCTION DESCRIPTION

– 19 –
•MAIN BOARD IC501 µPD78058GC-463-3B9 (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Function
1 RC IN0 I Rotary remote commander shift key A/D input terminal
2 ILL.IN I Dimmer detection signal input Dimmer is present at input of “L”
3 NIL I Not used (fixed at “L”)
4 AVSS — Ground terminal (for A/D converter)
5 LCDANG O Output signal for the LCD view angle adjustment
6 NIL I Not used (fixed at “L”)
7 AVREF1 I Reference voltage (+5V) input terminal (for D/A converter)
8 RE IN0 I Rotary encoder (RE701) input terminal
9 RE IN1 I Rotary encoder (RE701) input terminal
10 SUB-CONT1 O Sub-woofer control signal output
11 SUB-CONT2 O Sub-woofer control signal output
12 LCDSO O Serial data output to the liquid crystal display driver (IC701)
13 LCDCKO O Serial data transfer clock signal output to the liquid crystal display driver (IC701)
14 LCDCE O Chip enable output to the liquid crystal display driver (IC701)
15 LCDINH O Blank indicate control signal output to the liquid crystal display driver (IC701)
“L”: no display
16 UNISI I Serial data input from the SONY bus interface (IC571)
17 UNISO O Serial data output to the SONY bus interface (IC571)
18 UNICKI I Serial data reading clock signal input terminal (for SONY bus)
19 UNICKO O Serial data transfer clock signal output to the tuner controller (IC101) and SONY bus interface
(IC571)
20 BUSON O Bus on/off control signal output to the tuner controller (IC101) and SONY bus interface (IC571)
“L”: bus on
21 SYSRST O Reset signal output to the tuner controller (IC101) and SONY bus interface (IC571) “L”: reset
22 AMPON O Standby control signal output to the power amplifier (IC701) “L”: standby
23 — — Not used (open)
24 NCO O Not used (open)
25 PW ON O Main system power supply on/off control signal output to the BA3918 (IC601) “H”: power on
26 ILLON O
27 COLOR O Illumination color selection signal output “H”: amber, “L”: green
28 AMSON O Tape auto music sensor control signal output to the CXA2511AQ (IC231)
“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 Auto METAL detect signal input from the METAL detect switch on the mechanism block
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 (IC201)
(For the loading direction and forward side operation) *1
37 LM EJ O Loading/tape operation motor control signal output to the LB1638M (IC201)
(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
Power supply on/off control signal output terminal at the illumination and liquid crystal display
driver (IC701) “H”: power on
At power select switch (S501) on mode: “H” output at the accessory on
At power select switch (S501) off mode: “H” output at the power on

– 20 –
Pin No. Pin Name I/O Function
38 N/R OUT O Forward/reverse direction control signal output to the CXA2511AQ (IC231)
“H: forward direction, “L”: reverse direction
39 MTLON O METAL on/off control signal output to the CXA2511AQ (IC231) “H”: METAL on
40 CM ON O Capstan/reel motor (M901) drive signal output terminal “H”: motor on
41 TAPON O Tape system power supply on/off control signal output terminal “H”: tape on
42 PW SEL I Power select switch (S501) input terminal “L”: off (halt mode), “H”: on (operation mode)
43 RC IN1 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 EQSEL I Equalizer selection input terminal (fixed at “H”)
46 BEEP O Beep sound drive signal output terminal
47 MUT O Muting control signal output to the line muting circuit and power amplifier (IC701)
“H”: muting on
48 VOLCE O Chip enable signal output to the main electrical volume (IC301)
49 SUBCE O Chip enable signal output to the sub electrical volume (IC382)
50 VOLCKO O Serial data transfer clock signal output to the main electrical volume (IC301)
51 SUBCKO O Serial data transfer clock signal output to the sub electrical volume (IC382)
52 VOLSO O Serial data output to the main electrical volume (IC301) and sub electrical volume (IC382)
53 TAPMUT O Tape muting on/off control signal output to the CXA2511AQ (IC231) “H”: tape muting on
54 DOLON O Dolby on/off control signal output to the CXA2511AQ (IC231) “H”: dolby on
55 DOLBC I/O
56 AMSIN I Whether a music is present or not from CXA2511AQ (IC231) is detected at auto music sensor
“L”: music is present, “H”: music is not present
57 DIMMER O Dimmer control signal output terminal
58 AD ON O Power supply on/off control signal output for the A/D converter “L”: power on
59 TIRIND O LED drive signal output for the TIR indicator “L”: LED on Not used (open)
60 RESET I System reset signal input from the reset signal generator (IC551) and reset switch (S551)
“L” is input for several 100 msec after power on, then it changes to “H”
61 SIRCS I Sircs signal input from the remote control receiver (IC702)
62 BU IN I Battery detect signal input from the SONY bus interface (IC571) and battery check circuit
“H”: battery on
63 DOORSW I Door open/close detect input “L”: door close
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 TELMUT 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”
68 VDD — Power supply terminal (+5V)
69 X OUT O Main system clock output terminal (5 MHz)
70 X IN I Main system clock input terminal (5 MHz)
71 GND — Ground terminal
72 XT OUT O Sub system clock output terminal (32.768 kHz)
73 XT IN I Sub system clock input terminal (32.768 kHz)
74 AVDD — Power supply terminal (+5V) (for A/D converter)
75 AVREF0 I Reference voltage input terminal (+5V) (for A/D converter)
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 to the CXA2511AQ (IC231)
“L”: dolby B, “H”: dolby C