Sony CDX-GT21W/GT210/GT260/GT260S, Block Diagram - Display Section, Waveforms, MAIN Board

CDX-GT21W/GT210/GT260/GT260S

4-2. BLOCK DIAGRAM — DISPLAY SECTION —

SYSTEM CONTROL	DISPLAY CONTROL
IC501 (2/2)	IC901

•NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.

(In addition to this, the necessary note is printed in each block.)

KEY MATRIX			40 KEYIN1						3
LSW903–910, S904								S1
					LCD_SO	28	48 DI			LCD901
LSW901, 902, S901–903			41 KEYIN0
					LCD_CKO 29		47 CL		34	LIQUID
								S33	•
	D503				LCD_CE 27		46 CE		39	CRYSTAL
								COM4 35		DISPLAY
	KEY ACKNOWLEDGE						BACKLIGHT			PANEL
								DIMMER
		SWITCH	52 KEY ACK					COM1 38
		Q664
RE901
PUSH SELECT			76 AD_ON
(VOLUME)							1	2
ROTARY		RE-0								PANEL+B
			31	RE-IN0					LED931
ENCODER		RE-1
			32	RE-IN1				(LCDLIGHTBACK)
		BU+3.3V									LSW901–910
											KEY
	10K										(ILLUMINATE )
S502
( FREQUENCYSELECT	)		3	AREASEL2
	9K
								DIMMER
GT260/GT260S								SWITCH
								Q931
		X502	79 XOUT
		32.768kHz	80 XIN					BACK LIGHT
									SWITCH	PANEL+B	GT21W/GT210
			82 OSCIN						Q932
		X501
							GT260/GT260S				LED861–865,
		18.432MHz
			83 OSCOUT								LED871–874
							REMOTE CONTROL
											KEY
							SIGNAL RECEIVER				(ILLUMINATE )
	CN901	CN701					IC971

15 15 7 NOSE_SW SIRCS 64 2 OUT IR

PANEL+B	GT260/GT260S
	LED941–945,
	LED951–953
	KEY
	(ILLUMINATE )

For schematic diagrams.

Note:

•All capacitors are in ∝F unless otherwise noted. (p: pF) 50 WV or less are not indicated except for electrolytics and tantalums.

•All resistors are in Ω and 1/4 W or less unless otherwise specified.

•f : internal component.

•C : panel designation.

Note:	Note:
The components identi-	Les composants identifiés par
fied by mark 0 or dotted	une marque 0 sont critiques
line with mark 0 are criti-	pour la sécurité.
cal for safety.	Ne les remplacer que par une
Replace only with part	piéce portant le numéro
number specified.	spécifié.

•A : B+ Line.

•B : B– Line.

•H : adjustment for repair.

•Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions.

no mark : FM

( ) : AM/MW/SW

<> : CD PLAY

∗: Impossible to measure

•Voltages are taken with a VOM (Input impedance 10 MΩ). Voltage variations may be noted due to normal production tolerances.

•Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal production tolerances.

•Circled numbers refer to waveforms.•Signal path.

J : CD PLAY

F : FM

f : AM/MW/SW

L : AUX

For printed wiring boards.

Note:

•X : parts extracted from the component side.

•Y : parts extracted from the conductor side.

•a : Through hole.

• : Pattern from the side which enables seeing. (The other layers' patterns are not indicated.)

Caution:

Pattern face side: Parts on the pattern face side seen from the

(Side B) pattern face are indicated.

Parts face side: Parts on the parts face side seen from the

(Side A)			parts face are indicated.
		C
		Q	These are omitted
	B E

B E C

These are omitted

E C B

These are omitted

• Waveforms

— MAIN Board —

1IC501 ul (XOUT)

2IC501 id (OSCOUT)

1Vp-p

3.1Vp-p

32.768kHz

18.432MHz

0.5 V/DIV, 20 ∝sec/DIV

1 V/DIV, 20 nsec/DIV

CDX-GT21W/GT210/GT260/GT260S

20 20