Sharp CDC-831-W Service manual

CD-C831W

SERVICE MANUAL

No. S5934CDC831W/

CD-C831W

CD-C831W mini component system consisting of CD-C831W (Main unit), CP-C831 (Front speaker) and GBOXS0025AWM1 (Surround speaker).

• In the interests of user-safety the set should be restored to its original condition and only parts identical to those specified be used.

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

This document has been published to be used

SHARP CORPORATION– 1 –	for after sales service only.
	The contents are subject to change without notice.

CD-C831W

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 IMPORTANT THAT THE FOLLOWING PRECAUTIONS ARE OBSERVED DURING SERVICING TO PROTECT YOUR EYES AGAINST EXPOSURE TO THE LASER BEAM.

1-WHEN THE CABINET IS REMOVED, THE POWER IS TURNED ON WITDOUT A COMPACT DISC IN POSITION AND THE 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	Laser Diode Properties
	Material: GaAIAs
	Wavelength: 780 nm
	Emission Duration: continuous
	Laser Output: max. 0.6 mW

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 procedures 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.

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.

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.

QACCB0008AW00				QACCL0002AW00

QACCE0011AW00						92LCoRD577B

92LPLUG027

92LPLUG155A

92LCoRDZ1652A

Figure 2 AC POWER SUPPLY CORD AND AC PLUG ADAPTOR

– 2 –

CD-C831W

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL.

SPECIFICATIONS

CD-C831W
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

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
CP-C831
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

GBOXS0025AWM1

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

Specifications for this model are subject to change without prior notice.

– 3 –

CD-C831W

CD-C831W

Front Panel

1.Disc Number Selector Buttons

2.Disc Tray

3.Multi Indicator

4.Disc Skip Button

5.Open/Close Button

NAMES OF PARTS

1

2

3

4 5

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

6 9

7 10

8	11

12

13

14

15 17 18 16

	19 20	21
	22
	23	25
		26
	24	27

28 29 30 31 32 33 34 35

36 37

– 4 –

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

CP-C831

Front Speaker

1.Tweeter

2.Woofer

3.Bass Reflex Ducts

4.Speaker Wire

GBOXS0025AWM1

Surround Speaker

1.Full Range Speaker

2.Speaker Wire

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

			CD-C831W
			3
			4
			5
			6
			7
1			8
2			9
1
2
			4
3
			1
			2
		1
2			8
3			9
4			10
5			11
6			12
7
13 14	15	16	17 18
19
20
21			23
22

– 5 –

– 6 –

SETTING THE CLOCK

(Main unit operation)

In this example, the clock is set for the 24-hour (0:00) system.

CLOCK
ON/
STAND-BY	TUNING/
MEMORY/	TIME
SET	( )

2

3

4

0:00 AM 0:00 AM 12:00

5

6

7

8

9

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
5	or it has been reset.
	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 automatically 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.

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 disconnected.

If this happens, follow the procedure below to change the clock time.

To change the clock time:

1Press the CLOCK button.

2Within 5 seconds, press the MEMORY/SET button.

3Perform steps 6 - 9 above.

To change the time display mode:

1Perform steps 1 - 2 in the section "RESETTING THE MICROCOMPUTER".

2Perform steps 1 - 9 above.

PREPARATION FOR USE

0.2 m - 6 m (8" - 20')

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 interfere with operation. Change the lighting or the direction of the unit.

Keep the remote control away from moisture, excessive heat, shock, and vibrations.

C831W-CD

SPAN

RESETTING THE MICROCOMPUTER

2

1,2

AM/FM interval (span)

The International Telecommunication Union (ITU) has established 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.

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.

MANUAL OPERATION

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.Take off nylon bands or wire holders where they need to be removed when disassembling the unit. After servicing the unit, be sure to rearrange the leads where they were before disassembling.

4.Take sufficient care on static electricity of integrated circuits and other circuits when servicing.

CD-C831W

STEP	REMOVAL		PROCEDURE		FIGURE
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

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 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.

CD-C831W

Top Cabinet

(A1) x2 ø3x12mm

(B2) x1

(B1) x1 ø3x10mm

Side Panel (Right)

		(A1) x2
		ø3x12mm
	Back Board	Side Panel
		(Left)
	(B1) x4	(B2) x1
	ø3x8mm	(B1) x1
		ø3x10mm
		Figure 7-1
	(C2) x1	CD Tray Cover
		(C1) x3
	Pull
		1
	(C3) x2

1

CD Player 2 Unit

(C2) x1

Back Board

Main PWB

(D1) x6 ø3x10mm

Figure 7-2

LOCK

LEVER

Figure 7-3

– 7 –

CD-C831W

	(E1) x2
(F2) x2	ø3x10mm	(F1) x1

ø3x10mm

Front Panel

(F5) x1

(F4) x1

(F2) x2

(F3)x1

(E2) x1

(G2) x1

(G3) x1

			(E1) x1
			ø3x10mm
			(G3) x1
			(F1) x3
	Tuner PWB		ø3x10mm
		Main PWB	(G1) x1
			ø3x10mm
		Figure 8-1
		(J2)x2
	Switch PWB		(J3)x1
			Front Panel
	(J1)x2
	ø3x10mm
			Display PWB
	(J1)x7
	ø3x10mm		Headphones
			PWB
			Open
	(J1)x3
	ø3x10mm		Cassette
	(H2)x1		Holder
	(H1)x1		Tape Mechanism
	ø3x10mm
		(K1)x5
		ø3x10mm

Figure 8-2

(L1) x1 ø3 x10mm

(L2) x1

Washer

Turntable

Disc Tray

(M1) x1 ø3 x10mm

(M2) x1

	(M1) x1
CD Player Unit	ø3 x10mm

(M2) x1

Figure 8-3

(N1) x1 ø3 x10mm

CD Servo PWB (N2) x2

(N2) x2

CD Player Unit

Figure 8-4

(P1) x4

ø3 x12mm

(Q1) x1 ø2.6 x10mm

Shift Lever

CD Changer

Mechanism

CD Player Base

CD Mechanism

Be Careful when installing the CD changer mechanism. Install the CD changer mechanism on the CD player base after the shift lever has been set in the highest position.

Figure 8-5

– 8 –

CD-C831W

CP-C831

STEP	REMOVAL		PROCEDURE		FIGURE
1	Front Speaker	1. Front Panel ............		(A1) x1	9-1
		2.	Tip ..........................	(A2) x2
		3.	Screw .....................	(A3) x6

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.

(A3)x2

ø3x10mm

Tweeter	(A3)x4	(A2)x2
	ø4x12mm

Woofer

Front Panel

(A1)x1

Screw Driver

Figure 9-1

REMOVING AND REINSTALLING THE MAIN PARTS

CD MECHANISM SECTION

Perform steps 1, 2, 3, 11, 12, 13, 14 and 15 of the disassembly 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.

How to remove the pickup (See Fig. 9-3)

1.Remove the screws (B1) x 2 pcs., to remove the shaft (B2).

2.Remove the stop washer (B3) x 1 pc., to remove the gear (B4).

3.Remove the pickup.

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.

Loading Motor

Motor

PWB

(A1) x2 ø2.6 x5mm

Figure 9-2

(B1) x2

Stop Washer

ø2.6 x6mm

(B3) x1

Pickup

	Shaft	CD Mechanism
		Gear
	(B2) x1
		(B4) x1
		Figure 9-3

– 9 –

CD-C831W

ADJUSTMENT

MECHANISM SECTION

∙ 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		Specified				Instrument
			Point			Value			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	Setting/	Instrument
			Display	Adjusting	Connection
				Parts
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

•FM Mute Level

Signal generator: 1 kHz, 40 kHz dev., FM modulated

Frequency	Frequency	Adjusting	Instrument
	Display	Parts	Connection
98.00 MHz	98.00 MHz	VR351	Input: Antenna
(25 dBμV)			Output: Speaker
			Terminal

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

TAPE MECHANISM PWB

VRM1

SWM1

TAPE

FAS SPEED

SW

				TUNER PWB
					TP301		SO301
					R336
			VR351				ANTENNA
		T351
							TERMINAL
		AM IF
			FM MUTE		FE301
	IC303
TP302
			LEVEL
R357			T306		T302	AM
			AM BAND
						TRACKING
			COVERAGE
	Figure 10 ADJUSTMENT POINTS
			– 10 –

CD-C831W

TEST MODE

• Setting the test mode

Any one of test mode can be set by pressing several keys as follows. <REC. PAUSE> + <DISC. SKIP> + <POWER> TEST: CD operation test

• TEST mode

Function — CD test mode

Setting of TEST mode

Indication of CD TST mode (Fig. 11-1)

	OPEN/CLOSE operation is manual operation.				) or (		) key.		IL is not performed.
The pickup can be moved by using the (
		<MEMORY>		<MEMORY>		<MEMORY>				<STOP>
		LASER ON		Tracking on the spot.			Tracking on the spot.				STOP
				SERVO OFF PLAY			SERVO ON PLAY

<PLAY> key input

TOC. IL is performed, and the ordinary PLAY is performed.

Press <STOP> key.

Stop

If the following key is pressed during PLAY, it is possible

to specify directly any Track No.

<Disc Number 1> key: Track 4

<Disc Number 2> key: Track 9

<Disc Number 3> key: Track 15

Note:

Only in STOP state it is possible to slide the pickup with the (

) or (

) key.

VOL. --- Last memory

BAL. --- CENTER

1

2

3

R.GEQ. --- FLAT

X-BAS --- OFF

Canceling method - POWER OFF

Figure 11-1

CD SECTION

Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is not necessary to readjust it.

Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.

• Automatic adjustment item

1.Focus offset (Fig. 11-2)

2.Tracking offset (Fig. 11-3)

3.E/F balance (tracking error balance) (Fig. 11-4)

4.RF level AGC function (HF level: constant)

5.RF level automatic follow-up of the tracking gain

This automatic adjustment is performed each time a disc is changed. Therefore, each disc is played back using the optimal settings.

0.1s
0.50 V
IC1 20	FE
		FOCUS
		OFF-SET
		ADJUST
0.1s
0.50 V
IC1 7	TE	TRACKING
		OFF-SET
		1 ADJUST

		2
		Figure 11-2
	200 ms	TRACKING/
	1V/diV	ERROR
	IC 1 15	BARANCE
	TO	1 ADJUST
	200 ms
	1V/diV
	IC 1 7	2
	TE
		Figure 11-4

10ms 0.50 V

IC1 20 FE

10ms 0.50 V IC1 7 TE

Figure 11-3

Enlarged

View

TRACKING

OFF-SET 1 ADJUST

2

– 11 –

CD-C831W

NOTES ON SCHEMATIC DIAGRAM

∙Resistor:

To differentiate the units of resistors, such symbol as K and M are used: the symbol K means 1000 ohm and the symbol M means 1000 kohm and the resistor without any symbol is ohm-type resistor. Besides, the one with “Fusible” is a fuse type.

∙Capacitor:

To indicate the unit of capacitor, a symbol P is used: this symbol P means micro-micro-farad and the unit of the capacitor without such a symbol is microfarad. As to electrolytic capacitor, the expression “capacitance/withstand voltage” is used.

(CH), (TH), (RH), (UJ): Temperature compensation (ML): Mylar type

(P.P.): Polypropylene type

∙Schematic diagram and Wiring Side of P.W.Board for this model are subject to change for improvement without prior notice.

∙The indicated voltage in each section is the one measured by Digital Multimeter between such a section and the chassis with no signal given.

1.In the tuner section, ( ) indicates AM

< > indicates FM stereo

2.In the main section, a tape is being played back.

3.In the deck section, a tape is being played back. ( ) indicates the record state.

4.In the power section, a tape is being played back.

5.In the CD section, the CD is stopped.

∙Parts marked with “ ” ( ) are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set.

REF. NO

DESCRIPTION

POSITION

SW1

OPEN/CLOSE

ON—OFF

SW2

MECHA UP

ON—OFF

SW3

DISC NUMBER

ON—OFF

SW4

PICKUP IN

ON—OFF

SW601

SPAN SELECTOR

100/10 –50/9

SW701

ON/STAND-BY

ON—OFF

SW703

CLOCK

ON—OFF

SW704

TIMER/SLEEP

ON—OFF

SW705

DISC 1

ON—OFF

SW706

DISC 2

ON—OFF

SW707

DISC 3

ON—OFF

SW708

DISC SKIP

ON—OFF

SW709

OPEN/CLOSE

ON—OFF

SW710

REV

ON—OFF

SW711

REC PAUSE

ON—OFF

SW712

MEMORY/SET

ON—OFF

SW713

STOP

ON—OFF

SW714

TUNER/BAND

ON—OFF

FRONT

FRONT

VIEW

VIEW

B C E

(D)(G)(S)

E

C

B

(3) (2) (1)

(S)

(G)

(D)

(1)

(2)

(3)

REF. NO	DESCRIPTION	POSITION
SW715	VIDEO	ON—OFF
SW716	TAPE	ON—OFF
SW717	CD	ON—OFF
SW721	DISPLAY MODE	ON—OFF
SW722	FF	ON—OFF
SW723	TUNING UP	ON—OFF
SW724	TUNING DOWN	ON—OFF
SW725	PLAY	ON—OFF
SW726	VOLUME DOWN	ON—OFF
SW727	VOLUME UP	ON—OFF
SW728	X-BASS/DEMO	ON—OFF
SW729	EQUALIZER	ON—OFF
SW730	DIMMER	ON—OFF
SW801	VOLTAGE SELECTOR	110/127/220/
		230–240V
SWM 3	FOOL PROOF	ON—OFF
SWM 4	F.A.S.	ON—OFF
SWM 5	CAM	ON—OFF

FRONT VIEW

1 2 3

2SA1015 GR	KTA1266 GR	2SA1318	SVC348S	L1154GT4
2SA1318	KTA1271 Y			SLI342YCB
2SC2389 SE	KTA1273 Y			SLI342DCB
2SC3331	KTA1274 Y			SLI342UCB
KRC102 M	KTD2058 Y			SLI342UCB
KRC104 M	KTC3199 GR			SLI342YCJ
KRC107 M	KTC3203 Y

Figure 12 TYPES OF TRANSISTOR AND LED

– 12 –

CD-C831W

SW2

MECHA UP SW3

DISC No.

SW1 OPEN/CLOSE M3

LOADING

SOLM1

M

TO MAIN

CNS10

SECTION

10 9 8

7 6 5 4 3

2 1

TO MAIN SECTION

OPEN/CLOSE GND (D) M–

(TO IC601)

GND (D)

MECHA UP GND (D)

DISK NO.

GND (M)

+7.3V (B1)

CNP11

M+

CNP10

1 2 3 4 5 6

10 9 8

7 6 5 4 3

2 1

REGULATOR

Q81

+4.3V

Q51

33 38 39 46

37 38 39 40

27

24

25

43 XVDD

LCHO LVSS RVSS

RCHO

CONT1

CONT2

41 RVDD

+5V

36 LVDD

23 VDD

IC2

RES. CQCK. COIN SQOUT. RWC. WRQ

26

6 VVDD

LC78622NE

58

SERVO/SIGNAL

~

44

CONTROL

53

XL1

64

45

EFMO EFMIN

CLV+

~

CONTROL/CE

JP–

62

51

2

4 8 11

9 10 12 ~

20

XOUTXIN

+B1

CL, DAT, SELIAL

PU-IN SW

22

32 ~

40 43 44

+B1

JP–

CV+ SLC

SL1

CE 53

+B5

Q52

DAT 52

CL 51

IC1

DRF 54

SL+. SL–. DRF

42 41

20 40 24 18

28 39 38 37 36

VCC1

+5V

64

SL+ 31

LA9241M

SL– 30

IC3

35

SERVO AMP.

M63001FP

~

SLD 29

29

25

FOCUS/

22

NC 23

20

TRACKING/

LD0

7

21

Q1

62

SPO 27

SPIN/SLED

14

FIN2

FIN1 E

FD 16

2

DRIVER

F

15

1

~

1 2 3 4

8

23

6 7 4 5

15 16 26 27

M1

SPINDLE

MOTOR

UNIT			M
	COILFOCUS	COILTRACKING
PICKUP			M2
			SLED
			MOTOR
			M

PICKUP IN

SW4

Figure 13 BLOCK DIAGRAM (1/3)

– 13 –

CD-C831W

SO301

+B4

DETFM

CF351

+B4

X351 456kHz

ANTENNA

TERMINAL

FM IF

FM

FE301

8

1

CF302

AM IF

75 ohms

FM FRONT END

T351

CF352

5

FM IF IN

GND

2

6

7

3

4

OUT OSC

VT

1

2

3

4

5

8

9

17

19

20

18

16

AM

OUT

REG

IN GND

VCC

FM/AM

MPX

F

IC303

OUT

IN

VR351

LA1832

FM MUTE LEVEL

AM OSC FM/AM IF MPX. OUTIF

24

23

22

21

7

13

6

10

11

12

MPX

14 15

OUT

IN

AFC

RFAMIN

STEREO

MONO/ST

SD

Q361

Q353

L R

FMOSC

MUTING

MPX

VCO

Q354

AM RF

PHASE

CUT

TUNER MUTE

AM ANT

AM OSC

T302

T306

VOLTAGE

REGURATER

MONO/STFM

+B4

X352

INAM

INFM

INIF

+5V

4.5MHz

+B

+B4

20

1

22

15

16

11

10

13

12

17

OSC

IC302

FM

Q360

7

LC72131

FM

PLL (TUNER)

VOLTAGE

3

4

5

6

21

REGULATOR

CE

DI

CL

DO

Q371

									JK601
									VIDEO/AUX
									L	AUX
									R
										TAPE
		CNS11								TUNER
FROM CD SECTION		1								CD
		2
CNP11					IC101
		3
					AN7345K
				PLAYBACK AND RECORD					Q113
				/PLAYBACK AMP.
									Q114
	L-CH			L(T1) 1			13	+B4
TAPE 1				R(T1) 24		P.B.
PB HEAD	R-CH			L(T2) 2			4 L	PB
							21 R
				R(T2) 23
	REC	SWITCHING		L NF 3			5
	P.B			R NF 4			20
TAPE 2	L-CH	Q103~Q106	POP REDUCE 6		T1/T2	H/N	7	L REC
	R-CH
REC PB HEAD				L REC 9	REC		18	R
				R REC 16			8 L NF
	AC BIAS			REF 14			17 R NF
							10 ALC
				12	NOR/
						T1/T2
					HIGH
					15	19
			SWITCHING		SWITCHING
			Q107		Q111
			Q108
				Q109	SWITCHING		Q110
			BIAS						SWITCHING
			OCS	Q128					Q124
	ERASE			L104					L103
	HEAD

SWM3

FOOL PROOF

SWM4

F.A.S

SOLM1

SOLENOID

SWM5

CAM

		+B5	–B1
		8	4
	3	IC563
	5	KIA4558P		1
		OPE AMP.
		6	7

IC562

3KIA4558P OPE AMP.

8	4	1
		FM
		SW
+B5	–B1	+B7
		KIA7
		RE

11		10
L 5
R 16		IC601
L 4
R 17		M62439SP
L 3
R 18 AUDIO PROCESSO
L 2
R 19
1	20	9
		Q121
		Q122
		MUTING

BAIS

Q126

Figure 14 BLOCK DIAGRAM (2/3)

– 14 –

CD-C831W

SWM3

L PROOF

FL701

SWM4

F.A.S

DISPLAY

SOLM1

OLENOID

M

Q702

SWM5

1 2 3

4 ~ 15

16 ~ 25

26 ~ 28

29 ~ 36 37 38 39

Q703

CAM

MM1

TAPE MOTOR

Q705

Q706

Q707

SW601

SPAN

SELECTOR

D701

~D704

51 52 53 5455 5657 58 59 60 6162 63 64 65 66 67 68 69 70 71 72 73 7475 76 77 78 79 80

50

81

49

82

48

83

+B7

47

84

46 VDD

85

45

86

44

IC701

87

43

88

42

IX0281AW OR IX0310AW

89

41

90

FM/AM

SYSTEM CONTROL

40

91

SWITCHING

39

MICROCOMPUTER

92

7

IC704

1

3

38

93

KIA7042AP 2

37

94

+B7

36

95

RESET

1

35

96

34

AVDD

97

RX701 3

33

VDD

98

UNSWITCH

2

32

99

+B7

31

VDD

100

MEMORY

+B7

30 29 28 2726 2524 23 22 21 2019 18 17 16 15 14 13 12 11 10 9 8

7 6

5 4

3

2

1

BACK UP

TO CD

+B5

+B7

SECTION

XL701

Q704

Q960

M FANM901MOTOR

4.19MHz

+B5

KEY

+B5

SW701~SW717

PHM1

+B4

SW721~SW730

JK970

Q908

HEADPHONES

RL901

SO901

1

IC901

SPEAKER

13 R

14

FRONT

TERMINAL

SP

8 L

10

STK407040B

6

L-OUT

SURROUND

CESSOR

POWER AMP.

7 R-OUT

Q601

Q603

SPEAKER

+B

Q602

Q604

–B

3

15

T801

POWER

1 2

–15V

D801

F802

TRANSFORMER

FRONT

T4A L 250V

SPEAKER

–B1

VOLTAGE

REGULATOR

+B1

+7.3V

Q822

230-240V

SW801

Q121

REC

F832

F803

VOLTAGE

Q122

T500mA L 250V

T4A L 250V

SELECTOR

MUTING

VOLTAGE

220V

+B4

+12V(ANALOG)

REGULATOR

Q824

D803~D806

127V

VOLTAGE

+B5

+12V(MOTOR)

Q823 REGULATOR

110V

+B2

+5.6V

Q821

VOLTAGE

T.F

REGULATOR

ZD801

Q801

D807

RL801

AC POWER

~D809

F805

SUPPLY CORD

T1/T2

ZD802

T2A L 250V

AC 110/127/220/230-240V

50/60Hz

+B6

+5V

Q802

+B7

UNSWITCH

Q803

BAIS

T802

POWER

D810~D813

TRANSFORMER

Figure 15 BLOCK DIAGRAM (3/3)

– 15 –

CD-C831W

A

B

C

D

E

F

G

H

FM SIGNAL

PLAYBACK SIGNAL

RECORD SIGNAL

+B

PWB

1

BI6011

CNS11

R-CH

12P23- C

SERVOCDTO

2

A_GND

2

CNP11

L-CH

R615 3.9K

0.001

R645 100K

2.2K

R609 2.2K

IC601

M62439SP

PROCESSORAUDIO

10K

R612 22K

3

3

CD_GND

C601

R639

4

4

+7V

+B

4.7/50

47K

5

5

1

20

6

+12V

6

+B

C605

R607

1.5K

2

19 R608

1.

R605

1.5K

3

18 R606

1.

4.7/50

R603

1.5K

4

17

R604

1.

C603

R601

1.5K

5

16 R602

1.

4.7/50

C611

0.033 6

15

C612

0

C615

C613

7

14

C614

0

R635

R621

C635

R613

R611

0.22

0.22

8

13

330

10K

0.0047

10K

330

C621

9

12

Q603

10

11

Q601

0.1/50

2SC3331

C617

R610

2SC3331 R617

C625

10/50

R619

C623

C619

R623

2.2K

0.001

10K

R620

100K

C624

0.022

ZD601

2.2K

0.001

R618

C626

MTZJ2.4B

R616 3.9K

Q602

2.2K

0.001

R646

CD_+B

R636

C634

R614

0.1/50

2SC3331

Q604

2SC3331

C622

R629

12

330

0.0047

10K

330(1/2W)

CD_GND

R622

SECTION

13

10K

E-

R628 22K

1

L

C627

R625

C629

+B

A_GND

22/25

22K

22/25

2

P181

POWER

3

R

10

A_12V

+B

+B

R155

R175

TO

2

A_GND

150

1K

14

M_GND

Q109 ~ Q111: SWITCHING

Q110

C109

R114

KRC104 M

R173

R174

0.047

10K

0V

3.4V

5.6K

5.6K

R113

2

3

C153

1

10K

R115

100/16

R171

Q114

2SC3331

R172

8.6V

0V

3.4V

9.3V

4.7K

1

Q113

220K

220K

CNP101

3

C155 3.3/50

R132

33K

3.3/50

R136

8.2K

C154

0V

2SC3331

R-CH

CNS101

Q109

2

Q111

R169

R120

R170

C156

9.3V

2SA1318

KRC104 M

680

680

TAPE1

R112

PLAYBACK HEAD

10K

1

TAPE1_R

1

C102

R102

56

C120

0.001

1K

C118

560P

2

A_GND

2

C101

0.033

R126

3

TAPE1_L

3

R122

0.001

1K

100K

R124 3.9K

5.6K

R134

68K

R138

L-CH

C116

R101

47/25

Q104 2SC2389SE

R118

PLAYBACK HEAD

CNS102

CNP102

0V

2.2K

R108

47K

0V

0.001

1K

23

C114

21

C122

19

0V

330P 24

22

20

TAPE2

C106

0.7V

330P

1/50

RECORD/

180P

R104

0V

C112

ERASE

1

M_GND

1

R106

–

3.3K

112K

C108

+

HEAD

2

ERASE

2

0V

0.7V

R110

4.7K

0V

2SC3331

Hich=T1

3

TAPE2_R2

3

Q108

+

112K

R-CH

Q106

–

4

A_GND

4

2SC2389 SE

1

2

3

4

5

6

5

TAPE2_R1

5

C111

C128 3.3/50 R137

0V 2SC2389 SE

R107R109 47K4.7K

Q107

2SC3331

C107 0.001

330P

33K

C127 0.022

6

TAPE2_L1 6

L-CH

R117

C113

7

TAPE2_L2

7

Q105

0V

1K

330P

C121

2SC2389 SE

C115

R123 3.9K

0.7V

0V

1/50

47/25

C105

R105

0V

R121

R125

180P

0V

3.3K

0.7V

100K

5.6K

C117

R103

0V

2.2K

0.033

C119

R119

560PR131

Q103

56

Q103 ~ Q108: SWITCHING

R135

R111

8.2K

10K

• NOTES ON SCHEMATIC DIAGRAM can be found on page 12.

1

2

3

4

5

6

Figure 16 SCHEMATIC DIAGRAM (1/9)

– 16 –

CD-C831W

L

CD SIGNAL

		C602			R642
608	1.5K	4.7/50
					47K
606	1.5K	C606							C654
604	1.5K	4.7/50		R640 47K					4.7/50
602	1.5K
612	0.033	C604	(1/2W)330	330			C653	4.7/50		C652
R612	22K	R630
614	0.22	4.7/50		R626	2.2K	R641
						47K
		–B		C628				Q651
				0.22				2SC3331
				R624					R651
									680
							R653		C651	1/50
	C616 10P	C620 10/50 C618 0.022 ZD602 MTZJ2.4B				R638	220K		R656 1K
									3.3/50
						220K	R655
							5.6K
						R637
						220K
		–B
					+B				+B

MUTING

REC_R

L

Q122

R156

REC

220K

2SC3331

R153

0V

R154

0V

R157

C154 47/16

10K

10K

220K

0.7V

R146 10K

0.7V

0V

Q121

0V

2SC3331

MUTING

R136 8.2K

C130

470P

560

R142 56

C140

0.0033

R134

68K

R138

6.8K

C132 0.001

R140

C136

0.068

C142

1/50

C145

22/25

C146

220/10

C134

R158

+B

22/25

220

6

7

8

9

10

11

12

ANDPLAYBACK RECORD/PLAYBACKAMP.

SWITCHING Q124 2SA1015GR

R164 4.7K

R162

3

2

19

18

17

16

15

14

13

11.7V

47K

–

56K

Nor/CrO2

RIPPLE

Vcc

+

11.6V

C128 3.3/50 R137 6.8K

C131 470P 0.001

560

0.068

56

0.0033

IC101 AN7345K

Hich=CHROME

+

56K

ALC

ALC

GND

0V

0V 1

–

L103

11.6V

0V

C133

100 H

Q126

22/25

KRC104 M

R141

1/50

R160

BIAS

150

C141

R167

0V

100K

BIAS OSC 0V

R139

C135

C139

R145

Q128

C129

10K

47K

C150

R168

R166

KTC3203 Y

0V

R135

0.0039

12

8.2K

C151

0.027

L104

(ML)

330 H

+B

R654 5.6K	R652 220K		Q650
			2SC3331
	R650	680	C650	3.3/50

+B
	+B
+B
C152	+B
47/25

			R633
			22K	L-CH
	R631	C631
				JK601
	22K	390P
				VIDEO
	R632	C632	R634
				IN
	22K	390P	22K	R-CH

D601

1SS133

D602

1SS133

C630

0.022

SW601

SPAN SELECTOR

FM/AM(KHz)

50/9

100/10

	D_GND
–B	CLK
	DO
	CE
	DI
	A_12V
	A_GND
	TUN_L
	TUN_R
	CLK
	DO
	CE
	DI
	A_GND
	VF1
	-VP
	VF2
	SPN_P
	HI_CUT
	S_MUTE
	SP_DET
	SP_RLY
	T_T1 T2
	T_BIAS
	REC/PLAY
	D_GND
	M_12V
	SPA_SIG
–B	–15V
	+5V

1

2

3

4

5

6

7

8

9

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

CNP303	P24 6 - A TUNER PWB
	TO

CNS303

CNS701	P20 1 - D DISPLAY PWB
	TO

		CNP701
	+B	M_12V	7	E-	SECTION
	–B	–15V
			6
		VF1
			17
		–VF
			15	P181	POWER
		SP_DET
		VF2	16
		+5V
			8
		SP_RLY	4		TO
			5

MAIN PWB-A1(1/2)

7

8

9

10

11

12

Figure 17 SCHEMATIC DIAGRAM (2/9)

– 17 –

CD-C831W

IC901

+

A

STK407-040B

Ch2

POWER AMP.

(2Ch)

+

–

–Vcc

–Vcc

+Vcc

NC

NC

Ch1

Out

Ch2 Out

Ch1

–

1

2

3

4

5

6

7

8

9

10

C915

11

12

13 C923 14

15

R912

120P

R921

47P

100(1/4W)

C916

22K

C904

10/50

C907

10/50

Fusible

C911

15P

R923

56K

C924

15P

R917

R918

R922

680

100/50

56K

680

C918 47/50

C912

R916

R913

100/50

1K

C917

B

100 (1/4W)

R924

1K

R925

0.1(1W)

Fusible

R926

47/50

R929

1K

0.1 (1W)

D903

D906

R939

56K

1SS133

1SS133

2SC3331

C921

C920

R930 R928

0.022

10K 1K

1SS133

Q906

R931

0.022

2SC3331

D904

Q907

2SC3331

C901

R905

10K

1

L

1/50

1K

Q905

Q904

R93

2SC3331

56

R901

100K

R902

68K

C902

220P

C938

47/50

+B

C

2

A_GND

R904

R903

100K

68K

C905

220P

R907

3

R

1K

C903

1/50

+B

4

SP_DET

SP_RLY

5

+B

+B

D

–B

D

T

R830

C909

6

–15V

820 (3W)

2200/50

+B1

C910

P17 12 - G

SECTION

R966

2200/50

22K

–B

2 - D,

MAIN

M_12V

+B

VOLTAGE

D803

D

7

REGULATOR

E

+B

+B

Q821

Q823

+B2

1N4004S

1

P16

TO

8

+5V

AN78L05

KTD2058 Y

D804

D

+B

0.047(ML)

3

1

+B

47/25

1SS133

2

0.047(ML)

1N4004S

1

C830

C821

D820

3300/25

D_GND

D821

1SS133

C824

R832

22K

C825

22/25

R825

33

VOLTAGE

C829

9

REGULATOR

R803

47K

Q824

A_12V

KIA7812P

MTZJ6.2A

+B

10

3

1

100/35

ZD801

R827

22K

C826

47/25

C827

C802

R802

2

C828 0.1

0.1

(ML)

(ML)

A_GND

F

11

R801

12K

Q822

VOLTAGE

CD_+B

REGULATOR

KIA7806P

12

3

1

+B

R

2

F832

0.1(ML)

D832

C833

C832

R837

10K

C831

47/25

1SS133

0.1

T500mA

D833

(ML)

L 250V

13

CD_GND

1SS133

14

M_GND

–VF

15

VF2

16

VF1

G

17

DISPLAY PWB

FM SIGNAL

P21 12 - E

CNS806

TO

MAIN PWB-A1(2/2)

H

• NOTES ON SCHEMATIC DIAGRAM can be found on page 12.

1

2

3

4

5

6

Figure 18 SCHEMATIC DIAGRAM (3/9)

– 18 –