Sharp CD-C831W User manual

– 1 –
CD-C831W
No. S5934CDC831W/
CONTENTS Page
SAFETY PRECAUTION FOR SERVICE MANUAL ........................................................................................................... 2
VOLTAGE SELECTION..................................................................................................................................................... 2
SPECIFICATIONS ..............................................................................................................................................................3
NAMES OF PARTS ........................................................................................................................................................... 4
OPERATION MANUAL ...................................................................................................................................................... 6
DISASSEMBLY.................................................................................................................................................................. 7
REMOVING AND REINSTALLING THE MAIN PARTS..................................................................................................... 9
ADJUSTMENT ................................................................................................................................................................. 10
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 12
BLOCK DIAGRAM ........................................................................................................................................................... 13
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD..............................................................................................16
VOLTAGE ........................................................................................................................................................................ 32
WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 33
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 34
FUNCTION TABLE OF IC................................................................................................................................................ 39
FL DISPLAY......................................................................................................................................................................46
PARTS GUIDE/EXPLODED VIEW
CD-C831W
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
SERVICE MANUAL
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
SHARP CORPORATION
CD-C831WminicomponentsystemconsistingofCD-C831W
(Mainunit), CP-C831(Front speaker)and GBOXS0025AWM1
(Surround speaker).

CD-C831W
– 2 –
SAFETY PRECAUTION FOR SERVICE MANUAL
WARNINGS
THE AEL (ACCESSIBLE EMISSION LEVEL) OF THE LASER POWER OUTPUT IS LESS THAN CLASS 1 BUT THE LASER
COMPONENT IS CAPABLE OF EMITTING RADIATION EXCEEDING THE LIMIT FOR CLASS 1. THEREFORE IT IS
IMPORTANTTHATTHEFOLLOWINGPRECAUTIONSAREOBSERVEDDURINGSERVICINGTOPROTECTYOUREYES
AGAINST EXPOSURE TO THE LASER BEAM.
1-WHENTHECABINETISREMOVED,THEPOWERISTURNEDONWITDOUTACOMPACTDISCINPOSITIONANDTHE
PICK-UP IS ON THE OUTER EDGE THE LASER WILL LIGHT FOR SEVERAL SECONDS TO DETECT A DISC. DO NOT
LOOK INTO THE PICK-UP LENS.
2-THE LASER POWER OUTPUT OF THE PICK-UP UNIT AND REPLACEMENT SERVICE PARTS ARE ALL FACTORY
PRE-SET BEFORE SHIPMENT.
DO NOT ATTEMPT TO RE-ADJUST THE LASER PICK-UP UNIT DURING REPLACEMENT OR SERVICING.
3-UNDER NO CIRCUMSTANCES STARE INTO THE PICK-UP LENS AT ANY TIME.
4-CAUTION-USE OF CONTROLS OR ADJUSTMENTS, OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE
SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.
CAUTION
This Mini Component System is classified as a CLASS
1 LASER product.
The CLASS 1 LASER PRODUCT label is located on the
rear cover.
Use of controls, adjustments or performance of proce-
dures other than those specified herein may result in
hazardous radiation exposure.
As the laser beam used in this compact disc player is
harmful to the eyes, do not attempt to disassemble the
cabinet. Refer servicing to qualified personnel only.
Laser Diode Properties
Material: GaAIAs
Wavelength: 780 nm
Emission Duration: continuous
Laser Output: max. 0.6 mW
CAUTION-INVISIBLE LASER RADIATION WHEN OPEN. DO NOT STARE INTO
BEAM OR VIEW DIRECTLY WITH OPTICAL INSTRUMENTS.
VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD. STIRRA
EJ IN I STRALEN OCH BETRAKTA EJ STRALEN MED OPTISKA INSTRUMENT.
ADVERSEL-USYNLIG LASERSTRALING VED ABNING. SE IKKE IND I
STRALEN-HELLER IKKE MED OPTISKE INSTRUMENTER.
VARO! AVATTAESSA OLET ALTTIINA NAKYMATON LASERSATEILYLLE.
ALA TUIJOTA SATEESEEN ALAKA KATSO SITA OPTISEN LAITTEEN LAPI.
VARNING-OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD.
STIRRA EJ IN I STRALEN OCH BETRAKTA EJ STRALEN GENOM OPTISKT
INSTRUMENT.
ADVERSEL-USYNLIG LASERSTRALING NAR DEKSEL APNES. STIRR IKKE
INN I STRALEN ELLER SE DIREKTE MED OPTISKE INSTRUMENTER.
VARO ! Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen.
VARNING! Osynlig laserstralning när denna del är öppnad och spärren är urkopplad. Betrakta ej strälen.
QACCB0008AW00
VOLTAGE SELECTION
The voltage selector is located on the AC voltage selector box. If adjustment is necessary, use a screwdriver in order to turn the
selector in either direction until the correct voltage figure is displayed in the window next to the adjustment screw.
Figure 2 AC POWER SUPPLY CORD AND AC PLUG ADAPTOR
QACCE0011AW00
92LCoRDZ1652A
QACCL0002AW00
92LCoRD577B
92LPLUG027 92LPLUG155A

– 3 –
CD-C831W
Cassette deck section
Type: Compact cassette tape
Frequency response: 50 - 14,000 Hz (Normal tape)
Motor: DC motor with electronic
governor x 1
Signal/noise ratio: 55 dB (TAPE 1, playback)
50 dB (TAPE 2, recording/
playback)
Bias and erasure system: AC
Tape speed: 4.76 cm/sec. (1-7/8 ips.)
Wow and flutter: 0.15 % (WRMS)
Heads: TAPE-1: Playback x 1
TAPE-2: Record/Playback x 1
Erase x 1
Front speaker section
Type: 2-way [13 cm (5-1/4") woofer
and 5 cm (2") tweeter]
Maximum input power: 60 W
Rated input power: 30 W
Impedance: 6 ohms
Dimensions: Width; 220 mm (8-11/16")
Height; 300 mm (11-13/16")
Depth; 217 mm (8-9/16")
Weight: 2.6 kg (5.7 lbs.)/each
Surround speaker section
Type: 10 cm (4") full range speaker
Maximum input power: 20 W
Rated input power: 10 W
Impedance: 16 ohms
Dimensions: Width; 170 mm (6-3/4")
Height; 170 mm (6-3/4")
Depth; 88 mm (3-1/2")
Weight: 0.4 kg (0.9 lbs.)/each
CP-C831
GBOXS0025AWM1
General
Power source: AC 110/127/220/230-240 V,
50/60 Hz
Power consumption: 89 W
Dimensions: Width; 270 mm (10-5/8")
Height; 300 mm (11-13/16")
Depth; 351 mm (13-13/16")
Weight: 6.4 kg (14.1 lbs.)
Amplifier section
Output power: MPO; 144 W (72 W + 72 W)
(10 % T.H.D.)
RMS; 80 W (40 W + 40 W)
(10 % T.H.D.)
RMS; 66 W (33 W + 33 W)
(0.9 % T.H.D.)
Input terminal: Video/Auxiliary (audio signal);
500 mV/47 kohms
Output terminals: Front speakers; 6 ohms
Surround Speakers; 16 ohms
Headphones; 16-50 ohms
(recommended; 32 ohms)
Compact disc player section
Type: 3-disc multi-play compact disc
player
Signal readout: Non-contact, 3-beam semi-
conductor laser pickup
D/A Converter: 1-bit D/A converter
Frequency response: 20 - 20,000 Hz
Dynamic range: 90 dB (1 kHz)
Tuner section
Frequency range: FM; 88 - 108 MHz
AM; 531 - 1,602 kHz
Specifications for this model are subject to change without
prior notice.
SPECIFICATIONS
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
CD-C831W

CD-C831W
– 4 –
NAMES OF PARTS
Front Panel
1. Disc Number Selector Buttons
2. Disc Tray
3. Multi Indicator
4. Disc Skip Button
5. Open/Close Button
6. Extra Bass Indicator
7. FM Stereo Mode Indicator
8. FM Stereo Indicator
9. (CD) Repeat Indicator
10. (CD) Play Indicator
11. (CD) Pause Indicator
12. (CD) Disc Number Indicators
13. (CD/TUNER) Memory Indicator
14. Timer Play Indicator
15. Timer Record Indicator
16. Sleep Indicator
16. Dynamic PTY Indicator
17. Spectrum Analyzer/ Volume Level Indicator
18. (TAPE 2) Racord Indicator
19. Timer Set Indicator
20. (CD) Track Down/Review Button
(TUNER) Preset Down Button
(TAPE 2) Rewind Button
21. (CD) Track Up/Cue Button
(TUNER) Preset Up Button
(TAPE 2) Fast Forward Button
22. Timer/Sleep Button
23. Clock Button
24. On/Stand-by Button
25. Equalizer Mode Selector Button
26. Dimmer Button
27. Extra Bass/Demo Mode Button
28. Headphone Socket
29. Function Selector Buttons
30. (TAPE 2) Record Pause Button
31. Memory/Set Button
32. (CD/TAPE) Stop Button
33. (TAPE) Play Button
(CD) Play/Repeat Button
34. Tuning and Time Up/Down Buttons
35. Volume Up/Down Buttons
36. (TAPE 1) Cassette Compartment
37. (TAPE 2) Cassette Compartment
CD-C831W
17 18
14
35
6
123 45
7
8
13
15
11 12
10
9
16
19
33
25
26
27
28 29 30 31
20 21
24
22
23
32 34
37
36

– 5 –
CD-C831W
Front Speaker
1. Tweeter
2. Woofer
3. Bass Reflex Ducts
4. Speaker Wire
Surround Speaker
1. Full Range Speaker
2. Speaker Wire
CP-C831
GBOXS0025AWM1
Remote Control
1. Remote Control Transmitter LED
CD Control section
2. Disc Number Select Buttons
3. Memory Button
4. Pause Button
5. Clear Button
6. Track Down/Review Button
7. Track Up/Cue Button
8. Disc Skip Button
9. Play/Repeat Button
10. Stop Button
11. Random Button
Tuner control section
12. Preset Up/Down Buttons
Tape control section
13. (TAPE 1) Play Button
14. (TAPE 2) Record Pause Button
15. (TAPE 1/2) Stop Button
16. (TAPE 2) Play Button
17. (TAPE 2) Rewind Button
18. (TAPE 2) Fast Forward Button
Common section
19. Equalizer Mode Selector Button
20. Function Selector Buttons
21. On/Stand-by Button
22. Extra Bass Button
23. Volume Up/Down Buttons
Rear Panel
1. AC Voltage Selector
2. AC Power Input Socket
3. AM Aerial Terminal
4. Aerial Earth Terminal
5. FM 75 Ohms Aerial Socket
6. Video/Auxiliary (Audio Signal) Input Sockets
7. Span Selector Switch
8. Surround Speaker Terminals
9. Front Speaker Terminals
5
1
6
2
3
4
7
8
9
1
2
34
1
2
1
8
3
410
9
5
6
7
11
12
13 14 16 17 18
20
19
21 23
2
15
22

CD-C831W
– 6 –
OPERATION MANUAL
TUNING/ TIME ( )
MEMORY/ SET
CLOCK
ON/ STAND-BY
1
Press the ON/STAND-BY button to enter the stand-by mode.
2
Press the CLOCK button.
3
Within 5 seconds, press the MEMORY/SET button.
4
Press the TUNING/TIME ( or ) button to select the time display mode.
"0:00" →The 24-hour display will appear. (0:00 - 23:59) "AM 12:00" →The 12-hour display will appear. (AM or PM 12:00 - 11:59) "AM 0:00" →The 12-hour display will appear. (AM or PM 0:00 - 11:59)
Note that this can only be set when the unit is first installed or it has been reset.
5
Press the MEMORY/SET button.
6
Press the TUNING/TIME ( or ) button to adjust the hour.
Press the TUNING/TIME ( or ) button once to advance the time by 1 hour. Hold it down to advance continuously. When the 12-hour display is selected, "AM" will change auto- matically to "PM".
7
Press the MEMORY/SET button.
8
Press the TUNING/TIME ( or ) button to adjust the minutes.
Press the TUNING/TIME ( or ) button once to advance the time by 1 minute. Hold it down to change the time in 5 minute intervals. The hour setting will not advance even if minutes advance from "59" to "00".
9
Press the MEMORY/SET button.
The clock starts operating from "0" seconds. (Seconds are not displayed.)
To see the time display: Press the CLOCK button.
The time display will appear for about 5 seconds.
AM 12:00AM 0:000:00
2 3
4
7
6 5
8 9
Note:
The clock display will flash on and off at the push of the CLOCK button when the AC power supply is restored after a power failure occurs or after the AC power lead is discon- nected. If this happens, follow the procedure below to change the clock time.
To change the clock time:
Press the CLOCK button. Within 5 seconds, press the MEMORY/SET button. Perform steps 6 - 9 above.
To change the time display mode:
Perform steps 1 - 2 in the section "RESETTING THE MICRO- COMPUTER". Perform steps 1 - 9 above.
(Main unit operation)
In this example, the clock is set for the 24-hour (0:00) system.
SETTING THE CLOCK
1 2
1
2
3
PREPARATION FOR USE
15
15
Remote control
Notes concerning use:
Replace the batteries if the operating distance is reduced or if the operation becomes erratic. Periodically clean the transmitter LED on the remote control and the sensor on the main unit with a soft cloth. Exposing the sensor on the main unit to strong light may in- terfere with operation. Change the lighting or the direction of the unit. Keep the remote control away from moisture, excessive heat, shock, and vibrations.
0.2 m - 6 m (8" - 20')
AM/FM interval (span)
The International Telecommunication Union (ITU) has estab- lished that member countries should maintain either a 10 kHz or a 9 kHz interval between broadcasting frequencies of any AM station. The illustration shows the 9 kHz interval zones (regions 1 and 3), and the 10 kHz interval zone (region 2). Before using the unit, set the SPAN SELECTOR switch (on the rear panel) to AM tuning interval (span) of your area.
To change the tuning zone: 1
Press the ON/STAND-BY button to enter the stand-by mode.
2
Set the SPAN SELECTOR switch to "50/9" for 9 kHz AM interval (50 kHz FM interval), and "100/10" for 10 kHz AM interval (100 kHz FM interval).
3
Whilst pressing down the button and the button, hold down the ON/STAND-BY button for at least 1 second.
Caution:
The operation explained above will erase all data stored in memory including clock and timer settings, and tuner and CD presets.
SPAN SELECTOR
FM/AM(kHz)
50/9
100/10
2
1,2
RESETTING THE MICROCOMPUTER
Reset the microcomputer under the following conditions:
To erase all of the stored memory contents (clock and timer settings, and tuner and CD presets). If the display is not correct. If the operation is not correct.
1
Press the ON/STAND-BY button to enter the stand-by mode.
2
Whilst pressing down the button and the button, hold down the ON/STAND-BY button for at least 1 second.
Caution:
The operation explained above will erase all data stored in memory including clock and timer settings, and tuner and CD presets.

– 7 –
CD-C831W
DISASSEMBLY
Caution on Disassembly
Follow the below-mentioned notes when disassembling
the unit and reassembling it, to keep it safe and ensure
excellent performance:
1. Take cassette tape and compact disc out of the unit.
2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit.
3.Takeoffnylon bands or wire holders where theyneedto
beremovedwhendisassemblingtheunit.Afterservicing
theunit,besure to rearrange the leads where theywere
before disassembling.
4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.
Figure 7-2
Figure 7-3
CD-C831W
1 Top Cabinet 1. Screw ..................... (A1) x4 7-1
2 Side Panel 1. Screw ..................... (B1) x6 7-1
(Left/right) 2. Hook....................... (B2) x2
3 CD Player Unit/ 1. Turn on the power supply, 7-2
CD Tray Cover open the disc tray, take out
the CD cover, and close.
(Note 1)
2. Hook....................... (C1) x3
3. Hook....................... (C2) x2
4. Socket .................... (C3) x2
4 Back Board 1. Screw ..................... (D1) x6 7-2
5 Tuner PWB 1. Screw ..................... (E1) x3 8-1
2. Socket .................... (E2) x1
6 Main PWB 1. Screw ..................... (F1) x4 8-1
2. Socket .................... (F2) x4
3. Flat Wire................. (F3) x1
4. Tip Wire.................. (F4) x1
5. Flat Cable............... (F5) x1
7 Front Panel 1. Screw ..................... (G1) x1 8-1
2. Socket .................... (G2) x1
3. Hook....................... (G3) x2
8 Headphones PWB 1. Screw ..................... (H1) x1 8-2
2. Support Bracket ..... (H2) x1
9 Display PWB/ 1. Screw ..................... (J1) x12 8-2
Switch PWB 2. Hook....................... (J2) x2
3.Socket ..................... (J3) x1
10 Tape Mechanism 1. Open the cassette holder. 8-2
2. Screw...................... (K1) x5
11 Turntable 1. Screw ..................... (L1) x1 8-3
2. Cover ..................... (L2) x1
12 Disc Tray 1. Screw ..................... (M1) x2 8-3
2. Guide ..................... (M2) x2
13 CD Servo PWB 1. Screw ..................... (N1) x1 8-4
(Note 2) 2. Socket .................... (N2) x4
14 CD Changer 1. Screw ..................... (P1) x4 8-5
Mechanism
15 CD Mechanism 1. Screw ..................... (Q1) x1 8-5
STEP REMOVAL PROCEDURE FIGURE
Note 1:
How to open the changer manually. (Fig. 7-3)
1. Turn fully the lock lever in the arrow direction through the
hole on the loading chassis bottom in this state.
After that, push forward the CD player base.
Note 2:
1.After removing the connectorforthe optical pickupfromthe
connector, wrap the conductive aluminium foil around the
front end of connector to protect the optical pickup from
electrostatic damage.
Figure 7-1
CD-C831W
Top Cabinet
(A1) x2
ø3x12mm
(A1) x2
ø3x12mm
(B2) x1
(B2) x1
Side Panel
(Left)
Side Panel
(Right)
(B1) x1
ø3x10mm
(B1) x1
ø3x10mm
(B1) x4
ø3x8mm
Back Board
(D1) x6
ø3x10mm
Back Board
Main PWB
CD Tray Cover
CD Player
Unit
(C1) x3
(C2) x1
(C3) x2
1
1
2
Pull
(C2) x1
LOCK
LEVER

CD-C831W
– 8 –
Figure 8-1
Figure 8-2
Figure 8-3
Be Careful when installing the CD changer mechanism.
InstalltheCDchangermechanismontheCDplayerbaseafter
the shift lever has been set in the highest position.
Figure 8-4
Figure 8-5
(G1) x1
ø3x10mm
(F1) x3
ø3x10mm
(E1) x1
ø3x10mm
(F1) x1
ø3x10mm
(E1) x2
ø3x10mm
(F4) x1
(G2) x1
Front Panel
Main PWB
Tuner PWB
(F2) x2
(F5) x1
(F3)x1
(F2) x2
(E2) x1
(G3) x1
(G3) x1
Front Panel
Display PWB
Switch PWB
Open
Cassette
Holder
Tape Mechanism
(J1)x2
ø3x10mm
(J1)x7
ø3x10mm
(J1)x3
ø3x10mm
(H1)x1
ø3x10mm (K1)x5
ø3x10mm
(H2)x1
Headphones
PWB
(J3)x1
(J2)x2
(M1) x1
ø3 x10mm
(M1) x1
ø3 x10mm
(L1) x1
ø3 x10mm
Turntable
Disc Tray
(L2) x1
(M2) x1
(M2) x1
CD Player Unit
Washer
(N1) x1
ø3 x10mm
(N2) x2
(N2) x2 CD Player Unit
CD Servo PWB
(P1) x4
ø3 x12mm
(Q1) x1
ø2.6 x10mm
CD Changer
Mechanism
CD Mechanism
Shift Lever
CD Player Base

– 9 –
CD-C831W
CP-C831
1 Front Speaker 1. Front Panel ............ (A1) x1 9-1
2. Tip .......................... (A2) x2
3. Screw ..................... (A3) x6
STEP REMOVAL PROCEDURE FIGURE
Figure 9-1
Note:
The Surround speakers can be easily disassembled.
Therefore the disassembling method is not described.
For details refer to the disassembling drawing in the Parts
Guide.
How to remove the pickup (See Fig. 9-3)
1.Removethescrews(B1)x2pcs.,toremove the shaft (B2).
2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).
3. Remove the pickup.
Figure 9-3
REMOVING AND REINSTALLING THE MAIN PARTS
CD MECHANISM SECTION
Performsteps1,2,3,11,12,13,14and15ofthedisassembly
method to remove the CD mechanism.
How to remove the loading motor
(See Fig. 9-2)
1. Remove the screws (A1) x 2 pcs., to remove the loading
motor.
Figure 9-2
Note
After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of connector to protect the optical pickup from
electrostatic damage.
(A1) x2
ø2.6 x5mm
Loading Motor
Motor
PWB
(B1) x2
ø2.6 x6mm
Shaft
(B2) x1
Stop Washer
(B3) x1
Gear
(B4) x1
CD Mechanism
Pickup
Screw Driver
Woofer
(A3)x4
ø4x12mm
(A3)x2
ø3x10mm (A2)x2
Front Panel
(A1)x1
Tweeter

CD-C831W
– 10 –
MECHANISM SECTION ADJUSTMENT
Figure 10 ADJUSTMENT POINTS
•Driving Force Check
Torque Meter Specified Value
Play: TW-2412 Tape 1: Over 80 g
Tape 2: Over 80 g
•Torque Check
Torque Meter Specified Value
Tape 1 Tape 2
Play: TW-2111 30 to 60 g. cm 30 to 100 g.cm
Fast forward: TW-2231 — 50 to 100 g.cm
Rewind: TW-2231 — 50 to 100 g.cm
•Tape Speed
Test Tape Adjusting
Point Specified
Value Instrument
Connection
Normal MTT-111 VRM1 3,000 ±Speaker
speed 30 Hz terminal
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage Frequency Frequency
Display Setting/ Adjusting
Parts
Instrument
Connection
IF 450 kHz 1,602 kHz T351 *1
AM Band — 531 kHz (fL): T306 *2
Coverage 1.1 ±0.1 V
AM 990 kHz 990 kHz (fH): T302 *1
Tracking
*1. Input: Antenna, Output: TP302
*2. Input: Antenna, Output: TP301
• FM
Notes:
1: Description of the "FM IF Adjustment" is not carried on this
Manual. It is because the IF coil in the FM front end section
has been best adjusted in the factory so that its further
adjustment is not needed at the field. When replacing the
FM front end assembly, no adjustment is needed either.
2: The parts in the FM front end section are prepared in a
complete unit, so you can't obtain each part individually
Adjusting
Parts Instrument Connection
Frequency
Display
Frequency
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
98.00 MHz 98.00 MHz VR351 Input: Antenna
(25 dBµV) Output: Speaker
Terminal
VRM1
TAPE
SPEED
FAS
SW
SWM1
TAPE MECHANISM PWB
CD ERROR CODE DESCRIPTION
When a malfunction occurs during CD operation, an error
code will be displayed to identify the function in CD operation
which failed.
Error State Code
0001 Cannot detect pickup-in SW
0101 Tray close operation error
0105 Tray close operation error
0201 Tray open operation error
0203 Tray open operation error
0304 Disc skip operation error
0305 Disc skip operation error
0307 Disc skip operation error
TP302
R357
T351 VR351
FM MUTE
LEVEL
R336 TP301
FE301
IC303
T306 T302
SO301
ANTENNA
TERMINAL
TUNER PWB
AM IF
AM BAND
COVERAGE AM
TRACKING