PIONEER KEH-P7910 Service Manual

Service KEH-P7900R/X1N/EW
Manual	ORDER NO.
	CRT2458

MULTI-CD/DAB CONTROL HIGH POWER CASSETTE PLAYER WITH RDS TUNER

KEH-P7900R X1N/EW

KEH-P7910R X1N/EE

MULTI-CD/DAB CONTROL HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER

KEH-P7950 X1N/ES

- This service manual should be used together with the following manual(s):

Model No.	Order No.	Mech. Module	Remarks
CX-1011	CRT2406	3L	Cassette Mech. Module:Mech.Description, Disassembly, Adjustment

NOTE:

-Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.

-This service manual does not describe the CD test mode.

For the operations in the CD test mode, refer to the CD player's Service manual.

CONTENTS

1.	SAFETY INFORMATION ............................................		2	7. GENERAL INFORMATION .......................................	63
2.	EXPLODED VIEWS AND PARTS LIST .......................		2	7.1 DISASSEMBLY ...................................................	63
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ...			10	7.2 IC ........................................................................	65
4. PCB CONNECTION DIAGRAM ................................			32	7.3 OPERATIONAL FLOW CHART ...........................	72
5.	ELECTRICAL PARTS LIST ........................................		44	8. OPERATIONS AND SPECIFICATIONS.....................	73
6. ADJUSTMENT..........................................................			62
PIONEER CORPORATION		4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS SERVICE INC.		P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
PIONEER EUROPE N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936

C PIONEER CORPORATION 2000	K-ZZB. FEB. 2000 Printed in Japan

KEH-P7900R,P7910R,P7950

1. SAFETY INFORMATION

This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual.

Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you are not qualified to perform the repair of this product properly and safely; you should not risk trying to do so and refer the repair to a qualified service technician.

2. EXPLODED VIEWS AND PARTS LIST

2.1 PACKING

- KEH-P7900R/X1N/EW, KEH-P7910R/X1N/EE

3

5

4

6

2

14

1

8

13

11

9

2

KEH-P7900R,P7910R,P7950

NOTE:

-Parts marked by “*” are generally unavailable because they are not in our Master Spare Parts List.

-Screws adjacent to mark on the product are used for disassembly.

-PACKING SECTION PARTS LIST

Mark No. Description			Part No.		Mark No. Description			Part No.
	1	Cord Assy(EW)	CDE6284			13-1	Polyethylene Bag	CEG1116
		Cord Assy(EE)	CDE6285			13-2	Owner’s Manual(EW)	CRD3180
	2	Inner Box	CHW1754				Owner’s Manual(EE)	CRD3187
	3	Accessory Assy	CEA1917			13-3	Owner’s Manual(EW)	CRD3181
	4	Screw	CBA1304			13-4	Owner’s Manual(EW)	CRD3182
	5	Handle	CNC5395			13-5	Installation Manual(EW)	CRD3183
	6	Bush	CNV3930				Installation Manual(EE)	CRD3188
*	7	Polyethylene Bag	E36-615	*		13-6	Passport(EW)	CRY1013
	8	Polyethylene Bag	CEG-162	*		13-7	Warranty Card	CRY1157
	9	Carton(EW)	CHG4027	*		13-8	Caution Card	CRP1207
		Carton(EE)	CHG4028	*		13-9	Caution Card(EE)	CRP1216
	10	Contain Box(EW)	CHL4027			14	Case Assy	CXB3520
		Contain Box(EE)	CHL4028
	11	Protector	CHP2251
	12	Protector	CHP2252

- Owner's Manual, Installation Manual

Model	Part No.	Language
KEH-P7900R/X1N/EW	CRD3180	English, Spanish
	CRD3181	German, French
	CRD3182	Italian, Dutch
	CRD3183	English, Spanish, German, French, Italian, Dutch

- Owner's Manual, Installation Manual

Model	Part No.	Language
KEH-P7910R/X1N/EE	CRD3187	English, Russian
	CRD3188	English, Russian

3

KEH-P7900R,P7910R,P7950

- KEH-P7950/X1N/ES

		18
		13	8	5
	14 15	3
			9
	16		6
		7
			11
			4	23
			12

25

22

2

17

24

20

1

- PACKING SECTION PARTS LIST

Mark No. Description			Part No.		Mark No. Description			Part No.
	1	Carton	CHG4029			16	Polyethylene Bag	CZE3188
	2	Cord Assy	CDE6231			17	Polyethylene Bag	CEG-162
*	3	Accessory Assy	CEA2350			18	Battery	CEX1006
	4	Spring	CBH1650			19	Contain Box	CHL4029
*	5	Screw Assy	CEA2351			20	Protector	CHP2251
	6	Screw	CBA1304			21	Protector	CHP2252
*	7	Polyethylene Bag	CEG-127			22	Case Assy	CXB3520
	8	Screw	CRZ50P090FMC			23	Inner Box	CHW1759
	9	Screw	TRZ50P080FMC			24-1	Polyethylene Bag	CEG1116
*	10	Polyethylene Bag	CEG-158			24-2	Owner’s Manual	CRD3184
	11	Handle	CNC5395			24-3	Owner’s Manual	CRD3185
	12	Bush	CNV3930			24-4	Installation Manual	CRD3186
	13	Base Assy	CEA2426	*		24-5	Caution Card	CRP1207
*	14	Base	CNS5031	*		24-6	Caution Card	CRP1216
*	15	Sheet	CZA3371			25	Remote Control Assy	CXB3875

- Owner's Manual, Installation Manual

Model	Part No.	Language
KEH-P7950/X1N/ES	CRD3184	English, Spanish,Portuguese(B)
	CRD3185	Chinese, Arabic
	CRD3186	English, Spanish, Portuguese(B), Chinese, Arabic

4

KEH-P7900R,P7910R,P7950

2.2 EXTERIOR

KEH-P7900R/X1N/EW

5

KEH-P7900R,P7910R,P7950

KEH-P7950/X1N/ES

KEH-P7910R/X1N/EE

(1) EXTERIOR SECTION PARTS LIST

Mark No. Description		Part No.	Mark No. Description			Part No.
1	Screw	BMZ30P040FZK	41		Holder	CNC8696
2	Screw	BSZ26P050FMC	42		Insulator	See Contrast table(2)
3	Screw	BSZ30P050FMC	43		Insulator	CNM6249
4	Screw	BSZ30P200FMC	44		Insulator	CNM6250
5	Cord Assy	CDE6233	45		Insulator	CNM6875
6	Cord Assy	See Contrast table(2)	46		Heat Sink	CNR1505
7	Fuse(10A)	CEK1136	47		Holder	CNV5375
8	Cap	See Contrast table(2)	48		FM/AM Tuner Unit	See Contrast table(2)
9	Cap	CNS1472	49		Holder	CNC7532
10	Resistor	RS1/2PMF102J	50		Detach Grille Assy	See Contrast table(2)
11	Screw	ISS26P055FUC	51		Screw	BPZ20P100FZK
12	Case	CNB2597	52		Knob	CAA1525
13	Holder	CNC6798	53		Button(SOURCE)	CAC6331
14	Holder	See Contrast table(2)	54		Button(OPEN)	CAC6333
15	Spacer	See Contrast table(2)	55		Button(F,A)	See Contrast table(2)
16	Insulator	CNM6640	56		Button(DISP)	See Contrast table(2)
17	Panel	See Contrast table(2)	57		Button(BAND)	See Contrast table(2)
18	Cap	CNV2680	58		Button(E)	CAC6464
19	Tuner Amp Unit	See Contrast table(2)	59		Spring	CBH2316
20	Screw	BPZ26P060FMC	60		Spring	CBH2320
21	Screw	BSZ26P060FMC	61		Cushion	CNM6542
22	Screw	BSZ26P160FMC	62		Spacer	CNM6943
23	Cord Assy	CDE5852	63		Cover	See Contrast table(2)
24	Clamper	CEF1007	64		Holder	CNV6177
25	Pin Jack(CN351)	CKB1028	65		Keyboard Unit	See Contrast table(2)
26	Terminal(CN403)	CKF1059	66		Connector(CN1901)	CKS4205
27	Plug(CN901)	CKM1278	67		Holder	CNC8698
28	Jack(CN451)	CKN1027	68		Cushion	CNM6633
29	Plug(CN352)	CKS1238	69		Spacer	CNM6710
30	Connector(CN751)	CKS3124	70		Spacer	CNM6711
31	Connector(CN101)	CKS3408	71		Sheet	CNM6746
32	Plug(CN801)	CKS3537	72		Holder	CNV6105
33	Connector(CN251)	CKS3568	73		OEL Unit	MXR8004
34	Jack(CN452)	CKS4061	74		Knob Unit	See Contrast table(2)
35	Antenna Jack(CN401)	CKX1056	75		Grille Unit	See Contrast table(2)
36	Panel	CNB2547	76		Button(EJECT)	CAC6327
37	Holder	See Contrast table(2)	77		Door	CAT2109
38	Holder	CNC7996	78		Screw(M2x2)	CBA1176
39	Case	CNC8138	79		Washer	CBF1038
40	Case	CNC8301	80		Spring	CBH1838

6

KEH-P7900R,P7910R,P7950

Mark No. Description		Part No.		Mark No. Description		Part No.
81	Spring	CBH2310	96		Gear	CNV5997
82	Spring	CBH2312	97		Pin	CNV6027
83	Spring	CBH2313	98		Panel PCB Unit	CWM6720
84	Spring	CBH2393	99		Socket(CN605)	CKS3550
85	Spring	CBL1492	100		Connector(CN604)	CKS4206
86	Holder	CNC8560	101		Damper Unit	CXB5070
87	Cushion	CNM5486	102		Holder Unit	CXB5736
88	Spacer	CNM6811	103		Holder Unit	CXB5737
89	Panel	CNS5728	104		Screw	IMS20P045FZK
90	Arm	CNV5991	105		Chassis Unit	See Contrast table(2)
91	Arm	CNV5992	106		Cassette Mechanism ModuleEXK4010
92	Arm	CNV5993	107		IC(IC301)	PAL005A
93	Lever	CNV5994	108		Transistor(Q921)	2SD2396
94	Gear	CNV5995	109		Chock Coil(L901)	CTH1171
95	Gear	CNV5996	110		Remote Control Assy	See Contrast table(2)
			111		Battery Cover	See Contrast table(2)
			112		Cushion	See Contrast table(2)
			113		Double Sided Tape	CNM6811

(2) CONTRAST TABLE

KEH-P7900R/X1N/EW, KEH-P7910R/X1N/EE and KEH-P7950/X1N/ES are constructed the same except for

the following:

Mark No. Symbol and Description			Part No.
		KEH-P7900R/X1N/EW	KEH-P7910R/X1N/EE	KEH-P7950/X1N/ES
6	Cord Assy	CDE6284	CDE6285	CDE6231
8	Cap	CKX-003	Not used	Not used
14	Holder	CNC8357	CNC5704	CNC5704
15	Spacer	CNM4913	Not used	Not used
17	Panel	CNS5992	CNS5992	CNS5993
19	Tuner Amp Unit	CWM6957	CWM6958	CWM6959
37	Holder	CNC7533	Not used	Not used
42	Insulator	CNM5967	Not used	Not used
48	FM/AM Tuner Unit	CWE1500	CWE1504	CWE1501
50	Detach Grille Assy	CXB4971	CXB4972	CXB4973
55	Button(F,A)	CAC6337	CAC6337	CAC6338
56	Button(DISP)	CAC6339	CAC6339	CAC6639
57	Button(BAND)	CAC6343	CAC6343	CAC6334
63	Cover	CNS5737	CNS5737	CNS5738
65	Keyboard Unit	CWM6940	CWM6940	CWM6939
74	Knob Unit	CXB5350	CXB5350	CXB5351
75	Grille Unit	CXB5658	CXB5659	CXB5660
105	Chassis Unit	CXB5194	CXB5258	CXB5258
110	Remote Control Assy	Not used	Not used	CXB3875
111	Battery Cover	Not used	Not used	CNS5032
112	Cushion	Not used	CNM4870	CNM4870

7

KEH-P7900R,P7910R,P7950

2.3 CASSETTE MECHANISM MODULE

8

KEH-P7900R,P7910R,P7950

- CASSETTE MECHANISM MODULE SECTION PARTS LIST

Mark No. Description		Part No.	Mark No. Description			Part No.
1	Screw	BSZ20P040FMC	46		Pinch Roller	ENV1518
2	Washer	CBF1037	47		Pinch Holder Unit	EXA1583
3	Washer	CBG1003	48		Pinch Roller	ENV1518
4	Screw	EBA1028	49		Reel Unit	EXA1585
5	Screw	EBA1037	50		Head Base Unit	EXA1586
6	Spring	EBH1531	51		Lever Unit	EXA1587
7	Spring	EBH1624	52		Gear Unit	EXA1588
8	Spring	EBH1625	53		Motor Unit(Service)	EXX1055
9	Spring	EBH1626	54		Washer	HBF-179
10	Spring	EBH1627	55		•••••
11	Spring	EBH1629	56		•••••
12	Cord	EDD1024	57		Arm	ENC1537
13	Photo-reflector(EGN1)	EGN1004
14	Arm	ENC1526
15	Lever	ENC1530
16	Lever	ENC1531
17	Arm	ENC1532
18	Frame	ENC1533
19	Holder	ENC1534
20	Gear	ENC1535
21	Arm	ENC1536
22	Roller	ENR1040
23	Belt	ENT1027
24	Collar	ENV1508
25	Arm	ENV1539
26	Arm	ENV1540
27	Gear	ENV1544
28	Gear	ENV1547
29	Gear	ENV1548
30	Worm Wheel	ENV1550
31	Lever	ENV1551
32	Flywheel	ENV1554
33	Gathering PCB	ENX1054
34	Switch(S1,S2,S3)	ESG1007
35	Deck Unit	EWM1024
36	Plug(CN251)	CKS3540
37	Gathering PCB	ENX1053
38	Motor Unit(M1)	EXA1490
39	Motor	EXM1027
40	Head Assy(HD1)	EXA1589
41	Motor Unit(M2)	EXA1580
42	Screw	BMZ20P022FMC
43	Bracket	ENC1528
44	Chassis Unit	EXA1582
45	Pinch Holder Unit	EXA1584

9

	1		2		3		4

KEH-P7900R,P7910R,P7950

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM

A

A TUNER AMP UNIT

B FM/AM TUNER UNIT

EW, EE

	CN401		FM FRONT END			FM/AM 1ST IF 10.7MHz
ANTENNA				Q3				T51	Q51		CF51			CF52 CF53
	1	27
	2	ANT1TV	ANT2TV			38	39					42	44	46	63
				TVRF	22										69
															70
									MIXER, IF AMP DET
															54
												IC 1			78
					35						PML002A			EW, EE	65
															71
				Q201 Q204		33	45	55 57		CF202		61 74		75

	28			EEPROM
	AM RF	X901	5	IC 3
		AM 2ND IF 450kHz	6 BR9010FV
	Q202
		VDD	DI/DO
		VCC

25

22 10

14

							Q151	Q153
	25	24			Q155			Q154
32	IC 2 PM4008A		L-OUT	6
			19					Q501
	34 33 41 44 11 12 13		46			RDS
					DECODER			24
			COMP 21		20	IC 501
			ldet	18	8	PM4009A
						11	12
							X501
								Q402
			NL2	4

4

3

CE2	CK CE1 SDBL		SL FMSD		NL1
12	15 16	8	13	2	3

B

C

Q401

VDD

VCC

LOCL

Q101

B.U

Q102

IP-BUS DRIVER

		5	IC 101	1	TX
		6		2	RX
			CA0008AM
CN101		ASNB
	8		8		IPPW
	5	B–
	1	B+
IP-BUS	7	BL+
	11	BL–
MIC		3	IC 453	7	B
CN452			NJM2068MD
		Q451			A
					BU
TEL
CN451

TEL5V

RESET

							2	IC 961	1
	F DECK UNIT						VDD	S-80734ANDY-I
	CN252			CN251			CN251	B
1		EQ AMP 5		TAPE+B	4	4	VCC
FWD
	37
L-ch		IC 251	7	Lch			L1
	36				3	3
5
	39	CXA2560Q
REV
L-ch		18 17		MUTE			RIMUTE
6					9	9

M2

SUB M

MOTOR

M1

D MAIN M MOTOR

10

	1		2		3

	CN254	MECHANISM
			DRIVER			B.U
2			18	19			20	20	B.U
	5				17	stby			STBY
1			IC 351				19	19
	2
	1	PA2020A				mtl	8	8	MTLSW
	CN255	8	7	10
						LOAD	11	11	LOADSW
	CN253
		3	1	5	4	6
	CN256	3	1	5	4	6
	EGN1
	REEL
	SENSE
				S2	S3	S1
				MODE 70 s LOAD
	G REEL SENSE PCB
								4

1

2

3

4

KEH-P7900R,P7910R,P7950

A

Q911

VDD

Q913

B.U

Q601

adpw

22

CN901

AVREF

83

B.U

BUP

1

BACK UP

36

80

tmute

DALMON

GND

GND

29

fm/AM

SYSTEM

DFS

ES

2

CONTROLLER

IC 601 (1/2)

DRELAY

47

6

IC 681

1

ALARM

6

ALARM

TPD1018F

PE5100A(EW,EE)

93

Q931

PE5101A(ES)

bsens

B.U

88

ldet

92

ACC

ACC

42

asens

5

NL2DT

A

Q932

32

TUNPCE2

91

ILL

76

isens

3

ILLUMI

38

NL1

74

SD

50

Q681

ES

EW, EE

51

SL

dled

VDD

B.U

99

SDBW

Q683

97

TUNPCE

49

DRSW

DOOR

TUNPCK

DRSYS

7

30

LOCL

Q682

SW

98

48

TUNPDO

DRSENS

B

94

TUNPDI

Q951

25

ASENBO

TELIN

69

TEL

8

MUTE

86

TX

85

RX

24

IPPW

ELECTRONIC VOLUME/

SOURCE SELECTOR

POWER AMP

42

IN3_L

Frontout_L

10

12

RL–

23

RL–

9

RL-

43

IN4+L

IC 203

11

14 FLIN

IC 301

RL+

21

RL+

11 RL+

44

IN4_L

PML004AF

Rearout_L

9

RLIN

PAL005A

FL–

3

FL–

10

FL-

41

IN2_L

Preout_L

FL+

5

FL+

12 FL+

37

Q301

MUTE

STBY

R669,700,C685

IN1_R

B.REM

BZ641

22

4

25

BREM

DFS

6

5

4

B.REMOTE

ALARM

IC 451

SYSPW

ALARM

CN352

BUZZER

ES

1 TC4W66FU

2

EW, EE

Q352

FL

1

2

HIGH-OUT

4

IC 452

1

ES

6 NJM2068MD

Q131

Q132

9

16

Q453

IC 131

IC 271

EW, EE

8

14

SYS+B

VDD

7

18

BA3834F

PA2028A

17

SYSPW

Q452

100

Q133

CN351

PEE

RL

6

4

TEL1OUT

75

Q351

Q454

SAIN

B.U

Q261

1

EL5V

VDD

28

Q921

Q923

MUTE

SYS+B

B.U

10

15

TELSW

X2

Q983

Q262

C

SYSTEM

A

SYSPW

Q455

16

CONTROLLER X1

X601

Q981

Q922

E MIC PCB

IC 601 (1/2)

ASL AMP

ASL AMP

PE5100A(EW,EE)

VR751

Q751

CN751

CN752

PE5101A(ES)

ASLIN

77

1

IC 752

3

1

IC 751

3

1

1

MIC

Q851

Q852

VDD

NJM2068MD

NJM2068MD

2

2

EW, EE

MIC751

1

IC 851

6

NJM2360M

11

reset

OELPW

23

VDD

Q803

D PANEL PCB UNIT

C KEYBOARD UNIT

Q804

20

CN801

CN605

CN604

CN1901

EE, ES

ILMPW

Q802

ILB

2

2

3

10

ILB

D1911

SWVDD

SWDVDD

Q801

10

10

5

8

Q1907

EW

Q1903

Q1901

OELB

4

4

2

11

OELB

CVCC

D1912

67

EJECT

RIMUTE

64

stby

SWVDD

1

S602

Q1908

58

mtlsw

59

loadsw

EJTIN

78

EJSW

8

8

REMOTE CONTROL SENSOR

Q1904

Q1902

Q1905

Q805

IC 1903

4

OPT IN

1

8

EJILM

RS-140

FLPILM

6

6

11 XOUT

5 14 97

32

REM

VDD1 AVCC ILMD

D

VDD

EJILP

5

5

X1901

13

IC 1901

XIN

KEY MATRIX

TXD

96

DPDT

11

11

7

6

DPDT

34

DPDT

PD5554A

RXD

95

KYDT

12

12

8

5

KYDT

33

KYDT

RDT1

4

RDT1

14

14

10

3

ENCH

RDT0

3

RDT0

13

13

9

4

ENCL

IC 1905

IC 1902

S1930

PM5002A

PD8063A

IC 1904

csens

43

CSENS

CSENS

7

7

4

9

PD5536A

DGND

DGND

9

9

6

7

IC 1906

PM5003A

11

1

2

3

4

	1		2		3		4

KEH-P7900R,P7910R,P7950

3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)

Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL PARTS LIST”.

A			A-a
			E
			MIC PCB
		Large size
A-a	A-b	SCH diagram	IP-BUS:+2.2dBs
A-a	A-b	Guide page
A-a	A-b	Detailed page

	>
B	TEL
	200mA

MIC

			EW	ES
		R161	1R6K	2R7K
	EW,EE	R162 1R6K		2R7K
	AM(30%):-26dBs	R163	2R7K 1R6K
		R164	2R7K 1R6K
	FM(100%):-15.5dBs
		C161	R012	R018
	ES
		C162 R012		R018
	AM(30%):-30dBs
	FM(100%):-19.5dBs

C UNITTUNER FM/AM

B

NOTE :

S N di

S N di

TAPE:-9dBs

D

F

CN251

12 A E

	1		2		3

C KEYBOARD UNIT	CN1901	D PANEL PCB UNIT
4

5

:

Symbol indicates a resistor.

No differentiation is made between chip resistors and discrete resistors.

Symbol indicates a capacitor.

No differentiation is made between chip capacitors and discrete capacitors.

Decimal points for resistor and capacitor fixed values are expressed as :

2.2	←	2R2
0.022		←R022

6		7		8

KEH-P7900R,P7910R,P7950

A-b

A

The > mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation.

IP-BUS:+7.3dBs

TAPE:-5.9dBs (ES)

IP-BUS:+9.3dBs (EW,EE)

TAPE:-3.9dBs

	AM(30%):-27dBs	(EW, EE)
	FM(100%):-16.5dBs
	AM(30%):-31dBs	(ES)	AM(30%):-7.9dBs	(ES)
	FM(100%):-20.5dBs
			FM(100%):+2.6dBs
	IP-BUS:+2.2dBs
			AM(30%):-1.9dBs	(EW,EE)
	TAPE:-9dBs
			FM(100%):+6.6dBs
				(EW,EE)

DFSSW

DSENSE

A TUNER AMP UNIT

	EW,EE	ES
R351	820	82
R352	820	82
R353	820	82
R354	820	82
C351	10/16	10/35
C352	10/16	10/35
C353	10/16	10/35
C354	10/16	10/35

(ES) AM(30%):-0.4dBs FM(100%):+10.1dBs

IP-BUS:+14.8dBs

TAPE:+1.6dBs

B

HIGH-OUT

(EW,EE)

AM(30%):-2.66dBs

FM(100%):+5.84dBs

IP-BUS:+8.54dBs

TAPE:-4.66dBs

C

EW,EE	ES
R913 7R5K	6R2K	600mH

BACK UP

GND

ILLUMI

B.REMOTE

ACC

ALARM(ES)

DOOR SW(ES)

MUTE

RL+

FL+

RL-

FL-

RR+

FR+

RR-

FR-

(EW,EE)

AM(30%):+24.1dBs

FM(100%):+32.6dBs IP-BUS:+35.3dBs TAPE:+22.1dBs

(ES)

AM(30%):+18.1dBs

FM(100%):+28.6dBs IP-BUS:+33.3dBs TAPE:+20.1dBs

D

A 13

	5		6		7		8

E a-A 14 1

2

3

D		C		B		A

		A-a A-b		KEH
				-
E		NOTE :		2 1 P7900R,P7910R,P7950
		Symbol indicates a resistor.
MIC PCB		No differentiation is made	bet
		discrete resistors.
		Symbol indicates a capacitor.
	IP-BUS:+2.2dBs	No differentiation is made	bet
		discrete capacitors.

1

3

>

TEL

200mA

MIC

	AM(30%):-27dBs	(EW, EE)
	FM(100%):-16.5dBs
	AM(30%):-31dBs	(ES)
	FM(100%):-20.5dBs
	IP-BUS:+2.2dBs
	TAPE:-9dBs

4

			EW	ES
		R161	1R6K	2R7K
	EW,EE	R162	1R6K	2R7K
	AM(30%):-26dBs	R163	2R7K	1R6K
	FM(100%):-15.5dBs	R164	2R7K 1R6K
		C161	R012	R018
	ES
		C162	R012	R018

AM(30%):-30dBs

FM(100%):-19.5dBs

4

2

	5		6		7		8

KEH-P7900R,P7910R,P7950

3

DSENSE

A-a A-b

A

DPANELPCBUNIT

CN1901

CKEYBOARDUNIT

B

TAPE:-9dBs

F

CN251

C

D

BFM/AMTUNERUNIT

A-a 15

	5		6		7		8

b-A 16 1

2

1

3

D

stor.

ade between chip resistors and

acitor.

ade between chip capacitors and

C

Decimal points for resistor and capacitor fixed values are expressed as :

2.2	←	2R2
0.022		←	R022

IP-BUS:+7.3dBs

TAPE:-5.9dBs (ES)

IP-BUS:+9.3dBs (EW,EE)

TAPE:-3.9dBs

W, EE)
)	AM(30%):-7.9dBs (ES)
	FM(100%):+2.6dBs
	AM(30%):-1.9dBs (EW,EE)
	FM(100%):+6.6dBs
	(EW,EE)

4

B

The > mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation.

A TUNER AMP UNIT

	EW,EE	ES
R351	820	82
R352	820	82
R353	820	82
R354	820	82
C351	10/16	10/35
C352	10/16	10/35
C353	10/16	10/35
C354	10/16	10/35

(ES) AM(30%):-0.4dBs FM(100%):+10.1dBs

IP-BUS:+14.8dBs

TAPE:+1.6dBs

HIGH-OUT

A

A-a A-b

(EW,EE)

AM(30%):-2.66dBs

FM(100%):+5.84dBs

IP-BUS:+8.54dBs

TAPE:-4.66dBs

2 1 P7900R,P7910R,P7950-KEH

3

4

2

DFSSW

5

6

3

7

17 b-A 8

	EW,EE	ES
R913	7R5K	6R2K

600mH

BACK UP GND

ILLUMI

B.REMOTE

ACC

ALARM(ES)

DOOR SW(ES)

MUTE

RL+

FL+

RL-

FL-

RR+

FR+

RR-

FR-

(EW,EE)

AM(30%):+24.1dBs

FM(100%):+32.6dBs IP-BUS:+35.3dBs TAPE:+22.1dBs

(ES)

AM(30%):+18.1dBs

FM(100%):+28.6dBs IP-BUS:+33.3dBs TAPE:+20.1dBs

A-a A-b

5

6

KEH
	7
P7900R,P7910R,P7950-
	8

D

C

B

A

	1		2		3		4

KEH-P7900R,P7910R,P7950

3.3 FM/AM TUNER UNIT(KEH-P7900R/X1N/EW)

A				A

B FM/AM TUNER UNIT

Mark	Band	Input Level
None	–	–
F0	FM	0dBf
F65	FM	65dBf
F125	FM	125dBf
A0	AM	0dB
A74	AM	74dB
A125	AM	125dB

B

KV1410(23)

KV1410(23)

C

DAN217U

DAN217U

D

18 B

	1		2		3		4

	5		6		7		8

KEH-P7900R,P7910R,P7950

A

KV1410(23)

B

C

D

B 19

	5		6		7		8

	1		2		3		4

KEH-P7900R,P7910R,P7950

3.4 FM/AM TUNER UNIT(KEH-P7910R/X1N/EE)

A			A

B FM/AM TUNER UNIT

								Mark		Band	Input Level
								None		–	–
								F0		FM	0dBf
								F65		FM	65dBf
								F125		FM	125dBf
								A0		AM	0dB
								A74		AM	74dB
								A125		AM	125dB
B			470			470		470
4P			R5			R24		R5
				C30
				12P	0R0	C13					C33
							27P
											1
KV1410(23)	D7	1SS390	R23		C9 22P	D8	1SS390
		4700P	0R0	4700P	0R0		4700P		4700P
	C29		C26			C34		C27
C
					DAN217U
					DAN217U

D

20 B

	1		2		3		4

56P

R901

4R7K

C925 D901 C903

4700P 1SS390 27P

	5		6		7		8

KEH-P7900R,P7910R,P7950

A

P

01

7K

C925 D901 C903

27P
1SS390	KV1410(23)
4700P

B

R910 0R0

C

D

B 21

	5		6		7		8

	1		2		3		4

KEH-P7900R,P7910R,P7950

3.5 FM/AM TUNER UNIT(KEH-P7950/X1N/ES)

A

A

B FM/AM TUNER UNIT

Mark	Band	Input Level
None	–	–
F0	FM	0dBf
F65	FM	65dBf
F125	FM	125dBf
A0	AM	0dB
A74	AM	74dB
A125	AM	125dB

B

KV1410(23)

C

DAN217U

DAN217U

D

22 B

	1		2		3		4

	5		6		7		8

KEH-P7900R,P7910R,P7950

A

KV1410(23)

B

C

D

B 23

	5		6		7		8

	1		2		3		4

KEH-P7900R,P7910R,P7950

3.6 KEYBOARD UNIT(KEH-P7900R/X1N/EW, KEH-P7910R/X1N/EE)

A

D CN604

DISP

B

TA

EQ+

SOURCE

1

4

5

C

BAND

D

24 C

	1		2		3

ENT

EQ-

2

3

6

PT

AUDIO

TX(RT)

FUNC

OPEN

OE

4