Sony MZ-R900 service manual

MZ-R900

Note on Schematic Diagram:

• All capacitors are in ∝ F unless otherwise noted. pF: ∝∝ F

50 WV or less are not indicated except for electrolytics

•Semiconductor Location

6-4. PRINTED WIRING BOARDS

1 2 3

4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

	and tantalums.
•	All resistors are in Ω and 1/4 W or less unless otherwise
	specified.
•	% : indicates tolerance.
•	C: panel designation.

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

•A: B+ Line.

•Total current is measured with MD installed.

•Power voltage is dc 3 V and fed with regulated dc power supply from external power voltage jack.

•Voltages and waveforms are dc with respect to ground in

playback mode.

no mark : PLAYBACK

Ref. No.	Location
D301	H-13
D302	H-13
D303	F-13
D601	I-20
D602	I-15
D603	F-9
D605	I-16
D606	I-19
D607	H-21
D608	H-18
D801	D-18
D901	H-14
D902	F-15
D903	G-14
D904	G-14
IC301	E-15
IC302	G-13
IC303	E-13
IC501	G-18

A

B

MAIN BOARD	(COMPONENT SIDE)
C		S802
		SYNCHRO REC
		ON T OFF

S801

HOLD

HOLD T OFF

S803

PROTECT

DETECT

S805

OPEN

MAIN BOARD (CONDUCTOR SIDE)

RECHARGEBLE

BATTERY

(NICKEL-METAL)

NH-14WM

1.2V 1400mAh

MOTOR FLEXIBLE

BOARD

1-679-392- 11

MD

MECHANISM

( ) : REC

	∗	: Impossible to measure
•	Voltages are taken with a VOM (Input impedance 10 MΩ ).
	Voltage variations may be noted due to normal produc-
	tion tolerances.
•	Waveforms are taken with a oscilloscope.
	Voltage variations may be noted due to normal produc-

IC551	E-17
IC601	H-21
IC801	E-20
IC804	D-19
IC805	E-6
IC901	G-15

D		R840
	R845	R838

R837

R839

S804

BATTERY IN

DETECT

C823

R830

RB551

RB552

J301(1/2)

LINE IN

(OPT)

J301(2/2)

LINE IN

(OPT)

R307

R317

C211

C340

C330

R302

R318

R212

R211

C111

R111

Q302

S

C210

R112

C110

D

G

R306

C336

1	8	L802	C822			C811		C810
	IC804					FB804	+
								C815
				+	C821
4	5	FB803	FB801			FB802		X801

	tion tolerances.
•	Circled numbers refer to waveforms.
•	Signal path.
	E : PLAYBACK
	k : REC (ANALOG IN)
	l : REC (DIGITAL IN)
	* Replacement of IC801 used in this set requires a
	special tool.
• The voltage and waveform of CSP (chip size package)
	cannot be measured, because its lead layout is different
	form that of conventional IC.

Note on Printed Wiring Board:

•X: parts extracted from the component side.

•Y: parts extracted from the conductor side.

• : 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
(Conductor Side)	the pattern face are indicated.
Parts face side:	Parts on the parts face side seen from
(Component Side)	the parts face are indicated.

• MAIN board is four-layer printed board.

However, the patterns of layers 2 and 3 have not been

included in this diagrams.

* Replacement of IC801 used in this set requires a

Q302	D-14
Q501	F-17
Q601	I-20
Q602	G-9
Q603	I-20
Q604	H-19
Q605	H-18
Q801	I-14
Q803	H-14

							R814
					C818
		R831	C808	C807			R817	C814
E				R806
				C804	C812
											R810
		C835		R807	R809	R808	C802			R812
	(CHASSIS)							R802	R803
										R801

F

OPTICAL

PICK-UP BLOCK

(LCX-4R)

G

H
+
	C625	R619	R607				C630C629	C621
								R613
					R606
						R610
	C834
						C619
				C613

	C806	R805
R828	C819	C803
R829	C820	R833	EXECEPT
		R835
			US, Canadian
	C833
		R804
		C805

		RB553
IC805	C552	C551

1	5			C557
3	4		C559
C832	C522	C560	C558

C512	+	C554
CN501
1	+	C553
	+	C556

C334
		C308
+
		C307
	R907
		R908

C213	C113	+
+

+ C903

C322	C332
+
	+

(CHASSIS)

J303

MIC

(PLUG IN POWER)

C323	C314	C116	C118
+			C117
4		1
			R118
5		16
IC303		13
8
9		12

	+	R218
C318	C320		C216
			C217
			C218
R319			C303

C112

C212

C101
R102
R101
R201
	C201
C304
L302

	C203		C103
		28		22
		1
			IC301
		7
		8		14
+
C305		C306
		C302		+ C301
	L301

	R305
	R304
21
15			C913
	C914
		K

	CN502			D801	K A		118 106 107 108 109 110 111 100								112 105 104			88	92	83	79	77	70	81	60	58
							164 145		85	72	93	115 116 117 102			99	101	97	94	87	80	74	67	65	63	62	57	61
15	10	5	1			147	89	82	86	124 123 122 121 120 114 243 127 128 129 130 131 133 135 137														68	55	54	56
				R841
						157 159		90		75	78	64	69	71	119	98	103 143		91	84	76	73	66		59	49	53	+	C830
42			29			170 174 125																			44	50	47
						172 224 126			154																35	36	45
43			28
						180 161 132			153																31	30	51	L801
						182 149 134			151																113	24	42	SL801(TEST)
						181 166 136			142																25	20	26		C809
	IC551					165 168 138			139																28	16	40
				C561		140 146 141										*									23	17	38		+
						152 148 163									IC801										21	15	34	C813
					R844	185 179 183																			27	8	22
						191 189 193																			96	95	18
56			15		C827																							C801
						207 206 205																			19	4	9
1			14			232 158 156																			29	2	7

+ C555

R921

			C907
			+
	D603	L904	C311
K
		A

+ C310

S806

(OPEN/CLOSE DETECT)

+

C521

L303

R310

C344

+ C316

R309	K	C315
		+

	A	D303
R303	R301		C922

C925	C924	C923	+	C904
			AP912
			(GND)
	K		A	14

	D902		A
		R920
1			C926

									C502	C508		144 160 169				6	1	3
												150 167 171				48	10	5
AP914						R501	C501
								1		44		178 175 231				241	12	11
(VC)	C524		+	C529
												187 197 195				37	14	13
AP915	+		E B	Q501		R507					C509	199 173 228 176 216 184 215 196 221 194 212		52	238 240 234			32
(VL)					C	C503						177 162 226 220 188 217 223 186 192 198 214 219 222 218	230	33	236 237 239 242
TP		R519										155 204 203 201 209 211 210 208 225 202 200 213 190 227 229 233	46	43	235	41	39

20 L552

R604

R605

R917 L905

L902

Q602

1	8	+	C204	C309	+
		C104	+	R308
				C313	+
4	+	C312
	5

J302

i/ LINE OUT

IC302

4

5

8

9

C105 +

1

12

C205 +

		C906
16		R905
13	R816
		R815
FB301

R915

	R910		D903	15
		R941
		R909
			C921
	C908				IC901
R813		R903	C905
			R902
		K	A	28

56
	C917
43	R911

C915

(–)

L502

C518

C504

C510

R521

L501

IC501

C511

C513

R312

R824

R822

C526+

C817

TP

C505

R832

C816

R821

(+)

C506

C519

R823

C507

C516

C515

C514

C532

R825

C828

C829

22

23

K

L901

L601

L551
	C831
L903
	+

					FB303
					FB304
8		5
					FB305
D301					FB306
				K
1		4					A/K
				A
C329		C106				D302
	R103					C206
		R104
			R105

FB302					D904
		C337
					F801
		C
	Q803
	B			E
	R811
C338				C825
C335
R203			R204
		B2		E B1
R205
					Q801

29D901

AK

C901 +

		42	+
C902	R949			C919
+		R912	+ C920
		R901
	R947	R906	R946
				+
		R948		C911
	R936
	TH601

D607

L602

L603

C530

R517

R505

C612 +

+

C611

R620

R621

A

C523

5

4

14

1

Q605

4

1

15

56

+

+

+

8

1

C609

C624

C623

C607

D608

Q604

K

A

A

D606

IC601

R608

C608

5

4

C615

Q603

R603

C605

4

1

K

8

1

C606

C618

C836 R846 C2 C1

C601

R602 D605 28 43

special tool.

• Lead Layouts surface

Lead layout of conventional IC CSP (chip size package)

I

(CHASSIS)

J

05

L554

(CHASSIS)

L553

T601

C826

RB801

	11
1-679-610-	(11)

1	5	10	15	18
					A	K
		CN801
						D602

SWITCH	J601
	DC IN 3V
&
LCD MODULE UNIT	–	+

A

K

C603

C626

D601

K

R601

C616

29

42

C602

R622

C604

S

G

R608

C610

+

C633

+

+

A

Q601

C631

1-679-610-

C837

D

+

R611

C614

DRY BATTERY

SIZE “AA”

HR601

(IEC DESIGNATION R6)

OVER WRITE

1PC. 1.5V

HEAD

(BATTERY CASE)

11

(11)

30 30 30 30 30 30