Pioneer CDXFM-1277, CDXFM-1279 Service manual

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 NV Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936

C PIONEER CORPORATION 2000

K-ZZY. DEC. 2000 Printed in Japan

ORDER NO.

CRT2590

UNIVERSAL MULTI-CD SYSTEM

CDX-FM1277 X1N/UC

CDX-FM1277 X1N/ES

CDX-FM1277/X1N/UC

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

Model No. Order No. Mech. Module Remarks
CX-938 CRT2357 C8 CD Mech. Module:Circuit Description, Mech. Description, Disassembly

CONTENTS

1. SAFETY INFORMATION ............................................2

2. EXPLODED VIEWS AND PARTS LIST.......................3

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM...12

4. PCB CONNECTION DIAGRAM ................................26

5. ELECTRICAL PARTS LIST ........................................34

6. ADJUSTMENT..........................................................38

7. GENERAL INFORMATION .......................................48

7.1 DIAGNOSIS ........................................................48

7.1.1 TEST MODE..............................................48

7.1.2 DISASSEMBLY .........................................52

7.1.3 CONNECTOR FUNCTION DESCRIPTION54

7.2 PARTS .................................................................55

7.2.1 IC................................................................55

7.2.2 DISPLAY....................................................57

7.3 OPERATIONAL FLOW CHART...........................58

8. OPERATIONS AND SPECIFICATIONS.....................59

CDX-FM1279 X1N/UC

2

CDX-FM1277,FM1279

- CD Player Service Precautions

1. For pickup unit(CXX1285) handling, please refer
to"Disassembly"(see page 52).
During replacement, handling precautions shall be
taken to prevent an electrostatic discharge(protection
by a short pin).

2. During disassembly, be sure to turn the power off
since an internal IC might be destroyed when a con­nector is plugged or unplugged.

3. Please checking the grating after changing the ser­vice pickup unit(see page 41).

4. Since these screws protects the mechanism during
transport, be sure to affix it when it is transported for
repair, etc.

1. SAFETY INFORMATION

- CDX-FM1277/X1N/UC and CDX-FM1279/X1N/UC

CAUTION

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.

W

ARNING

This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of
California to cause cancer, birth defects or other reproductive harm.
Health & Safety Code Section 25249.6 - Proposition 65

A transport screw has been attached to the
set in order to protect it during transporta­tion. After removing the transport screw,
cover the hole with the supplied seal.
Be sure to remove the transport screw
before mounting the set. The removed
transport screw should be retained in the
accessory bag for use the next time the set
is transported.

Seal
After removing the transport
screw, cover the hole with
the supplied seal.

Transport screw
Attach to the original position before
transporting the set.

3

CDX-FM1277,FM1279

30

29

29

30

25

26

28

39

36

33

27

17

24

35

4

8

6

11

10

7

9

32

31

18

16

15

21

22

20

13

16

2

14

19

23

12

3

5

1

38

41

40

37

34

2. EXPLODED VIEWS AND PARTS LIST

2.1 PACKING

4

CDX-FM1277,FM1279

Part No.

Mark No. Description CDX-FM1277/X1N/UC CDX-FM1279/X1N/UC CDX-FM1277/X1N/ES

1 Accessory Assy CEA2767 CEA2767 CEA2768
2 Spring CBH-865 CBH-865 CBH-865
3 Cord CDE4289 CDE4289 CDE4289
4 Cord CDE5812 CDE5812 CDE5812
5 Cord CDE5814 CDE5814 CDE5814

6 Screw Assy CEA1962 CEA1962 CEA1962
7 Screw CBA1295 CBA1295 CBA1295

* 8 Polyethylene Sheet CNM5158 CNM5158 CNM5158

9 Screw HMB60P500FMC HMB60P500FMC HMB60P500FMC

10 Screw HMF40P080FZK HMF40P080FZK HMF40P080FZK

11 Nut NF60FMC NF60FMC NF60FMC
12 Screw Assy CEA1965 CEA1965 CEA1965

* 13 Polyethylene Bag CEG-127 CEG-127 CEG-127

14 Screw IMS30P050FZK IMS30P050FZK IMS30P050FZK
15 Clamper CEF1010 CEF1010 CEF1010

* 16 Polyethylene Bag CEG-158 CEG-158 CEG-158

17 Polyethylene Bag CEG1185 CEG1185 *CEG1263
18 Battery CEX1065 CEX1065 CEX1065
19 Bracket CNC8061 CNC8061 CNC8061
20 Cushion CNM3182 CNM3182 CNM3182

21 Fastener(Soft) CNM3872 CNM3872 CNM3872
22 Fastener(Rough) CNM4041 CNM4041 CNM4041
23 Panel CNS5428 CNS5428 CNS5428

* 24 Polyethylene Bag CEG1099 CEG1099 CEG1099

25 Polyethylene Bag CEG1174 CEG1174 CEG1026

26 Carton CHG4288 CHG4289 CHG4287
27 Sub Carton CHG4296 CHG4296 CHG4296
28 Contain Box CHL4288 CHL4289 CHL4287
29 Protector CHP2136 CHP2136 CHP2136
30 Protector CHP2137 CHP2137 CHP2137

31 Seal CNM5599 CNM5741 CNM5599
32-1 Installation Manual CRD3356 CRD3356 CRD3353
32-2 Owner’s Manual CRD3354 CRD3355 CRD3352

* 32-3 Warranty Card Not used CRY1070 Not used
* 32-4 Card ARY1048 Not used Not used

33 Antenna Select Assy CWM7445 CWM7445 CWM7445

34 Display Assy CXB6806 CXB6807 CXB6806

35 Remote Control Assy CXB6798 CXB6798 CXB6798

36 Magazine Assy CXB4028 CXB4028 CXB4028

37 Angle Assy CXB3589 CXB6817 CXB3589

* 38 Caution Card CRP1090 CRP1090 CRP1090
* 39 Caution Card CRP1233 CRP1233 CRP1233

40 Air Cushioned Bag CEG1055 CEG1055 CEG1055

41 Cover CEG1062 CEG1062 CEG1062

- PACKING SECTION PARTS LIST

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.

5

CDX-FM1277,FM1279

- Owner’s Manual

Model Part No. Language
CDX-FM1277/X1N/UC CRD3354 English, French
CDX-FM1279/X1N/UC CRD3355 English, French
CDX-FM1277/X1N/ES CRD3352 English, Spanish, Portuguese(B), Arabic

- Installation Manual

Model Part No. Language
CDX-FM1277/X1N/UC CRD3356 English, French
CDX-FM1279/X1N/UC CRD3356 English, French
CDX-FM1277/X1N/ES CRD3353 English, Spanish, Portuguese(B), Arabic

6

CDX-FM1277,FM1279

2.2 EXTERIOR

7

CDX-FM1277,FM1279

1 Screw BMZ26P040FMC
2 Screw BMZ30P040FZK
3 Button CAC6363
4 Screw CBA1353
5 Spring CBH1862

6 Connector CDE5525
7 Connector CDE6480
8 Cord CDE5812
9 Resistor RS1/2PMF102J

10 Cap CNS1472

11 Upper Case

See Contrast table(2)

12 Arm CNC8058
13 Insulator CNM6074
14 Panel CNS5218
15 Damper CNV6778

16 Antenna Select Assy CWM7445
17 Cord CDE4087
18 Antenna Cable CDH1207
19 Chassis CNA1555
20 Case CNB1764

21 Antenna Select Unit CWX2580
22 Plug(CN502) CKS1222
23 Plug(CN501) CKS2812
24 Antenna Jack(CN503) CKX1006
25 Extension Unit CWX2560

26 Screw BMZ26P060FMC
27 Jack(CN401) CKN1022
28 Plug(CN801) CKS-460
29 Connector(CN802) CKS3195
30 Connector(CN803) CKS3407

31 Connector(CN201) CKS3920
32 Holder CNC8060
33 Holder CNC8069
34 Remote Control Unit CXB6798
35 Cover CNS6439

36 Display Assy

See Contrast table(2)

37 Screw BPZ20P100FZK
38 Button CAC5887
39 Cord CDE5834
40 Cover CNS5223

41 LCD(LCD901) CAW1514
42 Holder CNC8062
43 Lighting Conductor CNV5594
44 Rubber CNV5599
45 Grille Unit

See Contrast table(2)

46 Grille Assy See Contrast table(2)
47 Door See Contrast table(2)
48 Door See Contrast table(2)
49 Lower Case Unit See Contrast table(2)
50 CD Mechanism Module(C8R2) CXK4965

51 Screw IMS20P030FZK
52 Screw IMS26P040FMC
53 Transistor(Q801) 2SD2396
54 IC(IC902) TSOP1840SB1

* 55 Caution Card CRP1233

(1) EXTERIOR SECTION PARTS LIST

Mark No. Description Part No. Mark No. Description Part No.

Part No.

Mark No. Symbol and Description CDX-FM1277/X1N/UC CDX-FM1279/X1N/UC CDX-FM1277/X1N/ES

11 Upper Case CNB2393 CNB2615 CNB2393
36 Display Assy CXB6806 CXB6807 CXB6806
45 Grille Unit CXB6812 CXB6813 CXB6812
46 Grille Assy CXB6832 CXB6833 CXB6832
47 Door CAT2205 CAT2203 CAT2205

48 Door CAT2206 CAT2208 CAT2206
49 Lower Case Unit CXB7008 CXB7007 CXB7008

(2) CONTRAST TABLE
CDX-FM1277/X1N/UC,CDX-FM1279/X1N/UC and CDX-FM1277/X1N/ES are constructed the same except
for the following:

8

CDX-FM1277,FM1279

2.3 CD MECHANISM MODULE

9

CDX-FM1277,FM1279

1 Connector CDE6069
2 CD Core Unit CWX2495
3 Connector(CN701) CKS1963
4 Connector(CN101) CKS2272
5 Screw BMZ20P025FMC

6 Screw(M2x2.5) CBA1037
7 Screw(M2x2.5) CBA1041
8 Screw(M2x2) CBA1176
9 Screw(M2x4) CBA1362

10 Screw(M2x1.4) CBA1387

11 Screw(M2x2.5) CBA1493
12 Screw(M2x1.6) CBA1476
13 Screw(M2x3) CBA1486
14 Washer CBF1038
15 Spring CBH2374

16 Spring CBH2172
17 Spring CBH2173
18 Spring CBH2174
19 Spring CBH2175
20 Spring CBH2177

21 Spring CBH2178
22 Spring CBH2179
23 Spring CBL1390
24 Spring CBL1393
25 Spring CBL1404

26 Short Pin CBL1239
27 Volume(VR801) CCW1024
28 Screw(M2x1.5) CBA1491
29 Shaft CLA3894
30 Arm CNC8482

31 Lever CNC7905
32 Lever CNC7906
33 Arm CNC7908
34 Arm CNC7909
35 Holder CNC7911

36 Holder CNC7912
37 Lever CNC7919
38 Stopper CNC7920
39 Frame CNC7921
40 Lever CNC7922

41 Bracket CNC7923
42 Lever CNC7924
43 Frame CNC7927
44 Frame CNC7928
45 Bracket CNC8355

46 Plate CNC8375
47 Cover CNC8434
48 Sheet CNM6009
49 Spacer CNM6428
50 Sheet CNM6296

51 PCB CNP5227
52 PCB CNP5228
53 Ball CNR1189
54 Gear CNR1531
55 Belt CNT1086

56 Gear CNV5472
57 Gear CNV5473
58 Rail CNV5920
59 Lever CNV6091
60 Gear CNV5477

61 Arm CNV5478
62 Holder CNV5480
63 Guide CNV5921
64 Guide CNV5922
65 Holder CNV5483

66 Holder CNV5484
67 Clamper CNV5485
68 Gear CNV5486
69 Gear CNV5562
70 Holder CNV5563

71 Stopper CNV5564
72 Lighting Conductor CNV5785
73 Mechanism PCB CWX2303
74 Connector(CN801) CKS1965
75 Connector(CN802) CKS3486

76 Damper Unit CXA7159
77 Chassis Unit CXB4463
78 •••••
79 Chassis Unit CXB4461
80 Arm Unit CXB2855

81 Screw Unit CXB4464
82 •••••
83 Frame Unit CXB4427
84 Magazine Holder Unit CXB4460
85

Motor Unit(M851)(SPINDLE) CXB3003

86

Motor Unit(M854)(CARRIAGE) CXB3004

87 Screw JFZ20P025FMC
88 Motor Unit(M853)(TRAY) CXB4421
89 Screw JFZ20P025FMC
90 Motor Unit(M852)(ELV) CXB3006

Mark No. Description Part No. Mark No. Description Part No.

- CD MECHANISM MODULE SECTION PARTS LIST

10

CDX-FM1277,FM1279

91 Screw JFZ20P025FMC
92 Lever Unit CXB3938
93 •••••
94 Gear Unit CXB5061
95 Screw JGZ17P025FZK

96 Pickup Unit(Service) CXX1285
97 •••••
98 •••••
99 Screw IMS26P040FMC

100 Screw JFZ20P025FNI

101 Photo-transistor(Q851) PT4800
102

Spring Switch(S851,S853) CSN1051

103 LED(D851) CN504-2
104 Spring Switch(S852) CSN1052

Mark No. Description Part No.

11

CDX-FM1277,FM1279

2.4 MAGAZINE ASSY

1 Magazine Assy CXB4028
2 Tray CNV5341
3 Label CRW1419

- MAGAZINE ASSY SECTION PARTS LIST

Mark No. Description Part No.

PICKUP UNIT (SERVICE) (P8)

MECHANISM

PCB

HOLOGRAM

UNIT

FOCUS ACT.

TRACKING ACT.

FO+

LD(–)

LASER
DIODE

CARRIAGE

MOTOR

MONITOR

DIODE

MD

TO+

+5V

M

SPINDLE

MOTOR

M

TRY

MOTOR

HOME SW

TRPSW

DSPSW

M

Q851

D851

D

SWITCH PCB

E

MOTOR PCB

C

S853

4

3
7
5

11

8
9

2
1

10

17

12

27

16
15

5

15

4
3

CN801

CN802

S852

S851

14

9

98

39

AC/F/E/BD

FD/TD/SD/MD

I13/I04/I02

97

11
16
15
17
18

3
5

10
12

DISC

TRP

DSP

DISC

TRP

DSP

92

95

91

EJECT SW

MAG SW

ELV

MOTOR

M

17

8

22

12
13

16
17
18

12

27

16
15

11

8
9

2
1

4
3

7
5

10

Q101

VD

PD

LIMIT

xtal

XTAL

L+

LD

cs

23

21

1

75

3

24

IPIN

IPOUT

IPPW

KYDT
DPDT

FMIPSW

XIN

XOUT

13

15

48

4

2

1

2
130

22

32
31
33

SYSPW

33

DISPPW

33

KYDT

BUSP

15

CDMUTE

PREN

LOUT

BUSM

DPDT

FMIPSW

29

CDMUTE

76

PREN

88

8

5

6

20

CONT

ejsw

mag

disk

TRP

DSP

11

74

75

X202

16.93MHz

X701

10.00MHz

IC 301

BA5986FM

IC 302

LB1836M

IC 604

BA4560F

IC 603

BA4560F

VD

Q771

VDD

IC 705

TC7SH32F

IC 702

LC35256FT-70U

SRAM

IC 703

HA12187FP

IP-BUS DRIVER

IC 701

PD5638A

CN701

C

19asensfm

asens

bsens

reset

ASENIN

BSENIN

ASENB

13 12

5

18 10

11

14

18

14

11

4

13

10

9
8

21

SYSPW

5

20

DISPPW

6

7

21

15

12

19 9

SVC2

11

5

6

12 7

4RESET SW

Q770

IC 704

PAJ002A

CK/DT/CS

VD

5V

POWER

10

31

5V REGULATOR

IC 202

BA05FP

1

VD

POWER

VD

10

16

22524

A

CD CORE UNIT

B

VR802

Q701

VREF

adena

98

ELVREF

ELVPVO

94

93

3

VDD

EVREF

GND

EPVO

LINEAR POSITION SENSOR

VR801

4CH SERVO DRIVER

MOTOR DRIVER

SYSTEM

CONTROLLER

CN101

S801

S803

S802

RF AMP, SERVO, DSP, DAC

IC 201

UPD63711GC

12

CDX-FM1277,FM1279

1

23

4

1234

D

C

B

A

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM

8

22

12
13

16
17
18

15

BUSP
BUSM
ASENB

KYDT
DPDT
FMIPSW

PRE-ENPHASIS

STEREO MODULATOR

CN201

19

ASENIN

SVC

5

11

14

18

14

CDMUTE

11

PREN

LCH

4

13

10

9
8

21

SYSPW

5

20

DISPPW

6

7

21

15

12

SVC

Q201

BUP

Q301

VR302

2

14

1

13

IC 201

BU4066BCF

X301

38kHz

VR301

LIN

BAL2

BAL1

38KOSC2

38KOSC3

18

17 16 5 6

MPXOUT

IC 301

BA1404F

PLL

148

9

6

12

IC 401

BU2611FS

AMP

12

IC 302

BA4560F

X401

7.2MHz

Q401

L402

CTC1079

Q402

TP30

Q403 Q404

2

LOUT

CN401

1

BUSP1

7

LOUT

5

BUSM1

8

ASENBUS

CN803

L201

CTF1333

Q802

Q803Q805

BUP

Q801

1

VD
VD

VD
VD

POWER

10

16

22524

Q806

BUP

BUP
ACC

GND

3

2

1

CN801

BUP

IP-BUS OUT

2

KYDT

3

DPDT

4

1PADD1/LCH

1

SWDACC

CN802

1

3

IC 801

NJM78L06A

Q804

BUP

VDD

B

EXTENSION UNIT

BATT.

GND

FUSE

2A

ACC

DPDT
KYDT 9

8

SI

SO

2

3

KEY

MATRIX

LCD 901

CAW1514

IC 902

TSOP1840SB1

REMOTE CONTROL

SENSOR

5V REGULATOR

78

23 10

V3

VCC

IC 901

PD6294A

SWDACC

CN901

1
2

2
3
4
1

X901

4.9152MHz

X1

X0

GND

Q901

1

3

INT1

G

DISPLAY ASSY

RF OUT

Q501

RY501

RELAY

1

RF IN

F

ANTENNA SELECT UNIT

CN501

CDRFIN

13

CDX-FM1277,1279

5

6

78

5

6

78

D

C

B

A

14

CDX-FM1277,FM1279

1

23

4

1234

D

C

B

A

3.2 CD MECHANISM MODULE

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

PARTS LIST”.

680Ω(B)

10kΩ(B)

1

12

6

13

10

4

8

VR801 CCW1024

LINEAR POSITION SENSOR

M852

CXB3006

RF AMP,

MO

4CH S

CN801

CN802

M853

CXB4421

M851

CXB3003

M854

CXB3004

CSN1052

CSN1051

CSN1051

CN504-2 PT4800

PICKUP UNIT(SERVICE)

C

MECHANISM
PCB

SWITCH PCB

D

MOTOR PCB

E

CXX1285

CCP1337

A

1/2

C

D E

15

CDX-FM1277,1279

5

6

78

5

6

78

D

C

B

A

18

7

2

5

19

20

15

17

16

12

21

3

9

11

10

AMP, SERVO, DSP, DAC

MOTOR DRIVER

CD CORE UNIT

A

A

2/2

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

2.2 2R2

0.022 R022

←

←

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.

Symbol indicates a resistor.
No differentiation is made between chip resistors and
discrete resistors.

NOTE :

Symbol indicates a capacitor.
No differentiation is made between chip capacitors and
discrete capacitors.

A

1/2

16

CDX-FM1277,FM1279

1

23

4

1234

D

C

B

A

SYSTEM CONTROLLER

A

1/2

A

2/2

17

CDX-FM1277,1279

5

6

78

5

6

78

D

C

B

A

SRAM

IP-BUS DRIVER

B

CN201

A

2/2

18

CDX-FM1277,FM1279

1 RFI 0.5V/div. 0.5µs/div.

Normal mode: play

1 CH1: RFI 1V/div.
2 CH2: MIRR 5V/div.

Test mode: Tracking open

0.5ms/div.

1 CH1: RFI 1V/div.
2 CH2: MIRR 5V/div.

Normal mode: The defect part

passes 800µm

0.5ms/div.

3 CH1: FD 0.5V/div.
4 CH2: FOR 2V/div.

Test mode: No disc, Focus close

0.2s/div.

3 CH1: FD 0.5V/div.
5 CH2: FOK 2V/div.

Normal mode: Focus close

0.2s/div.

6 CH1: FE 0.5V/div.
7 CH2: XSI 2V/div.

Normal mode: Focus close

1ms/div.

REFO

→

8 CH1: TE 0.5V/div.
9 CH2: TD 0.5V/div.

Test mode: 32 tracks jump (REV)

0.5ms/div.

8 CH1: TE 0.5V/div.
9 CH2: TD 0.5V/div.

Test mode: Single jump (REV)

0.5ms/div.

8 CH1: TE 0.5V/div.
9 CH2: TD 0.5V/div.

Test mode: 100 tracks jump (REV)

5ms/div.

6 CH1: FE 0.1V/div.
3 CH2: FD 0.2V/div.

Normal mode: Play

20ms/div.

3 CH1: FD 0.5V/div.
0 CH2: MD 1V/div.

Normal mode: Focus close (12cm)

0.5s/div.

3 CH1: FD 0.5V/div.
0 CH2: MD 1V/div.

Normal mode: Focus close (8cm)

0.5s/div.

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

GND

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

- Waveforms

Note:1. The encircled numbers denote measuring pointes in the circuit diagram.

2. Reference voltage
REFO:2.5V

REFO

→

REFO

→

REFO

→

REFO

→

19

CDX-FM1277,FM1279

8 CH1: TE 0.2V/div.
9 CH2: TD 0.2V/div.

Normal mode: play

8 CH1: TE 0.5V/div.
! CH2: SD 0.5V/div.

TEST mode:100Tracks jump(FWD)

5ms/div.

0 MD 0.5V/div. 0.1s/div.

Normal mode: Play (12cm)

0 MD 1V/div. 10ms/div.

Long Search (12cm)

@ EFM 1V/div. 5µs/div.

Normal mode: Play

8 CH1: TE 1V/div.
# CH2: TEC 1V/div.

Test mode: Focus close

Tracking open

2ms/div.

8 CH1: TE 0.5V/div.
6 CH2: FE 0.5V/div.

Normal mode:

AGC after focus close

0.2s/div.

20ms/div.

% SCKO 2V/div. 1µs/div.

Normal mode: Play

^ DOUT 2V/div. 10µs/div.

Normal mode: Play

& LRCK 2V/div. 20µs/div.

Normal mode: Play

* VD 5V/div. 50ms/div.

Normal mode: No disc

GND

→

REFO

→

REFO

→

GND

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

GND

→

REFO

→

GND

→

REFO

→

GND

→

REFO

→

20

CDX-FM1277,FM1279

( CH1: R OUT 2V/div.
) CH2: L OUT 2V/div.

Normal mode: Play (1kHz 0dB)

6 CH1: FE 0.2V/div.
3 CH2: FD 0.5V/div.

Normal mode: During AGC

1ms/div.

8 CH1: TE 0.2V/div.
9 CH2: TD 0.5V/div.

Normal mode: During AGC

1 CH1: RFI 1V/div.
⁄ CH2: HOLD 5V/div.

Normal mode: The defect part passes

800µm(B.D)

500µs/div.

1ms/div.

0.5ms/div.

3 CH1: FD 1V/div.
⁄ CH2: HOLD 5V/div.

Normal mode: The defect part passes

800µm(B.D)

0.5ms/div.

9 CH1: TD 0.1V/div.
⁄ CH2: HOLD 5V/div.

Normal mode: The defect part passes

800µm(B.D)

0.5ms/div.

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

REFO

→

21

CDX-FM1277,FM1279

47KΩ(B)

CN701

19kHz LPF

ADD ON MODE

LOOP FILTER

6V REG.

3V REG.

5V REG.

VD REGULATOR

IP

8

5

1

A

2/2

22

CDX-FM1277,FM1279

1

23

4

1234

D

C

B

A

B

3.3 EXTENSION UNIT

33KΩ(B)

F

CN501

G

CN901

BU
ACC
GND

FUSE 2A

1K(1/2W)

CEK1018

MAX AMP PILOT BUFFER AMP

ILTER

IP-BUS

B

EXTENSION UNIT

8 9 10 11

56 7

1234

1

2

3

4

5

23

CDX-FM1277,1279

5

6

78

5

6

78

D

C

B

A

B

24

CDX-FM1277,FM1279

1

23

4

1234

D

C

B

A

F

3.4 ANTENNA SELECT UNIT

B

CN401

F

TUNER

ANTENNA

ANTENNA SELECT UNIT

25

CDX-FM1277,FM1279

1

2

34

1

2

34

D

C

B

A

G

3.5 DISPLAY ASSY

KEY CONTROL AND

LCD DRIVER

B

CN802

G

DISPLAY ASSY

E

E

IC, Q

ADJ

M

M852
ELV

B

CN201

C

CN801

E

F

REFO

EREF

EPVO

1

25

26

50

51

75

76

100

26

CDX-FM1277,FM1279

1

23

4

1234

D

C

B

A

4. PCB CONNECTION DIAGRAM

4.1 CD CORE UNIT

SIDE A

CD CORE UNIT

A

NOTE FOR PCB DIAGRAMS

1. The parts mounted on this PCB
include all necessary parts for
several destination.
For further information for
respective destinations, be sure
to check with the schematic dia­gram.

Capacitor

Connector

P.C.Board

Chip Part

SIDE A

SIDE B

2. Viewpoint of PCB diagrams

A

27

CDX-FM1277,FM1279

1

2

34

1

2

34

D

C

B

A

E

E

IC, Q

RESET

EJECT

MAG

SIDE B

CD CORE UNIT

A

A

28

CDX-FM1277,FM1279

1

23

4

1234

D

C

B

A

B

4.2 EXTENSION UNIT

E

E

E

E

E

IC, Q ADJ

A

CN701

G

CN901

F

CN501

IP-BUS

MOD

BAL

TV

CORD

EXTENSION UNIT

B

SIDE A

29

CDX-FM1277,FM1279

1

2

34

1

2

34

D

C

B

A

B

E

E

IC, Q

EXTENSION UNIT

B

SIDE B

30

CDX-FM1277,FM1279

1

23

4

1234

D

C

B

A

4.4 SWITCH PCB

SWITCH PCB

D

C

4.3 MECHANISM PCB

A

CN101

E

D

MECHANISM PCB

C

M

M854
CRG

M

M851
SPDL

HOME

TRP

DSP

D851

PICKUP UNIT
(SERVICE)

C D

31

CDX-FM1277,FM1279

1

2

34

1

2

34

D

C

B

A

4.5 MOTOR PCB

MOTOR PCB

E

F

4.6 ANTENNA SELECT UNIT

E

ANTENNA

B

CN401

TUNER

ANTENNA SELECT UNIT

F

C

IC, Q

B

CN802

POWER P.MODE

PAUSE

DISC DOWN

DISC UP

TRACK DOWN

TRACK UP

32

CDX-FM1277,FM1279

1

23

4

1234

D

C

B

A

G

4.7 DISPLAY ASSY

SIDE A

DISPLAY ASSY

G

E

E

E

IC, Q

33

CDX-FM1277,FM1279

1

2

34

1

2

34

D

C

B

A

G

SIDE B

DISPLAY ASSY

G

34

CDX-FM1277,FM1279

Unit Number : CWX2560
Unit Name : Extension Unit

MISCELLANEOUS

IC 201 IC BU4066BCF
IC 301 IC BA1404F
IC 302 IC BA4560F
IC 401 IC BU2611FS
IC 801 IC NJM78L06A

Q 201 Transistor IMD3A
Q 202 Transistor FMG12
Q 301 Transistor DTC143TK
Q 401 Transistor IMX1
Q 402 Transistor 2SC2059K

Q 403 Transistor 2SC2059K
Q 404 Transistor 2SC2059K
Q 801 Transistor 2SD2396
Q 802 Transistor IMD2A
Q 803 Transistor 2SB710A

Q 804 Transistor IMH10A
Q 805 Transistor 2SB710A
Q 806 Transistor IMX1
D 201 Diode MA152WA
D 301 Diode MA111

D 302 Diode RB706D40
D 401 Diode DA204K
D 402 Diode KV1440
D 403 Diode MA111
D 801 Diode 1SR139-400

D 802 Diode 1SR139-400
D 803 Diode UDZS5R1(B)
D 804 Diode UDZS5R1(B)
D 805 Diode UDZ3R3(B)
L 201 Filter CTF1333

L 202 Filter CTF1333
L 301 Inductor LCTB2R2K2125
L 302 Inductor CTF1302
L 401 Inductor LCTB2R2K2125
L 402 Coil CTC1079

L 403 Inductor LCTB2R2K2125
L 404 Inductor LCTA1R0J3225
L 405 Inductor LCTA101J3225
L 406 Inductor LCTAR68J3225
X 301 Radiator 38.000kHz CSS1372

X 401 Crystal Resonator 7.2MHz CSS1030
VR 301 Semi-fixed 47kΩ(B) CCP1233
VR 302 Semi-fixed 33kΩ(B) CCP1232

RESISTORS

R 201 RS1/16S471J
R 202 RS1/16S471J
R 203 RS1/16S472J
R 204 RS1/16S472J
R 205 RS1/16S361J

R 206 RS1/16S361J
R 207 RS1/16S225J
R 208 RS1/16S225J
R 209 RS1/16S223J
R 210 RS1/16S223J

R 211 RS1/16S681J
R 212 RS1/16S681J
R 213 RS1/16S112J
R 214 RS1/16S112J
R 215 RS1/16S362J

R 216 RS1/16S362J
R 231 RS1/16S101J
R 232 RS1/16S101J
R 301 RS1/16S362J
R 302 RS1/16S823J

R 303 RS1/16S681J
R 304 RS1/16S392J
R 305 RS1/16S102J
R 306 RS1/16S392J
R 307 RS1/16S102J

R 308 RS1/16S392J
R 309 RS1/16S513J
R 310 RS1/16S103J
R 311 RS1/16S103J
R 312 RS1/16S103J

R 313 RS1/16S513J
R 314 RS1/16S101J
R 315 RS1/16S221J
R 316 RS1/10S104J
R 317 RS1/10S104J

R 318 RS1/16S683J
R 319 RS1/16S123J
R 320 RS1/16S472J
R 322 RS1/16S393J
R 323 RS1/16S0R0J

R 324 RS1/16S0R0J
R 401 RS1/16S223J
R 402 RS1/16S681J
R 403 RS1/16S362J
R 404 RS1/16S242J

R 405 RS1/16S822J
R 406 RS1/16S103J
R 407 RS1/16S103J
R 408 RS1/16S560J
R 409 RS1/16S103J

R 410 RS1/16S103J
R 411 RS1/16S332J
R 412 RS1/16S101J
R 413 RS1/16S222J
R 414 RS1/16S104J

R 415 RS1/16S244J
R 416 RS1/16S154J
R 417 RS1/16S152J
R 418 RS1/16S331J
R 419 RS1/16S122J

5. ELECTRICAL PARTS LIST

NOTE:

- Parts whose parts numbers are omitted are subject to being not supplied.

- The part numbers shown below indicate chip components.

Chip Resistor

RS1/_S___J,RS1/__S___J

Chip Capacitor (except for CQS.....)

CKS....., CCS....., CSZS.....

=====Circuit Symbol and No.===Part Name Part No.

--- ------ ------------------------------------------ -------------------------

=====Circuit Symbol and No.===Part Name Part No.

--- ------ ------------------------------------------ -------------------------

B

35

CDX-FM1277,FM1279

R 420 RS1/16S470J
R 421 RAB4C471J
R 801 RS1/16S183J
R 802 RS1/16S822J
R 803 RS1/16S204J

R 804 RS1/16S913J
R 805 RS1/8S391J
R 806 RS1/16S681J
R 807 RS1/16S0R0J
R 808 RS1/4S152J

R 809 RS1/16S223J
R 810 RS1/16S223J
R 811 RS1/4S152J
R 812 RS1/16S181J
R 813 RS1/16S560J

R 814 RS1/16S102J
R 815 RS1/16S473J
R 816 RS1/16S0R0J
R 817 RS1/4S750J
R 818 RS1/16S102J

R 819 RS1/16S152J
R 820 RS1/4S121J
R 823 RS1/10S222J

CAPACITORS

C 201 CEAL330M6R3
C 202 CEAL330M6R3
C 203 CKSRYB103K50
C 204 CKSRYB103K50
C 205 CKSRYB392K50

C 206 CKSRYB392K50
C 207 CKSRYB332K50
C 208 CKSRYB332K50
C 209 CEAL1R0M50
C 210 CEAL1R0M50

C 211 CKSRYB102K50
C 212 CKSRYB102K50
C 213 CKSRYB102K50
C 214 CKSRYB102K50
C 301 CEAL100M16

C 302 CKSRYB103K50
C 303 CCSRCH120J50
C 304 CEAL220M16
C 305 CKSRYB104K16
C 306 CKSRYB103K50

C 307 CCSRCH101J50
C 308 CEALR47M50
C 309 CKSRYB103K50
C 310 CEAL100M16
C 311 CCSRCH160J50

C 312 CEAL100M16
C 313 CKSRYB104K16
C 314 CKSRYB105K10
C 315 CEAL220M16
C 316 CKSRYB104K16

C 317 CCSRCH271J50
C 318 CCSQCH162J50
C 319 CEAL100M16
C 401 CCSRCH270J50
C 402 CCSRCH270J50

C 403 CKSRYB104K16
C 404 CKSRYB102K50
C 405 CKSRYB473K16
C 406 CEALNP330M10
C 407 CEAL470M6R3

C 408 CKSRYB104K16
C 409 CCSRCH180J50
C 410 CCSRCH100D50
C 411 CCSRCH330J50
C 412 CCSRCH180J50

C 413 CCSRCK1R0C50
C 414 CKSRYB103K50
C 415 CCSRCK1R0C50
C 416 CKSRYB103K50
C 417 CKSRYB103K50

C 418 CCSRCJ3R0C50
C 419 CKSRYB103K50
C 421 CKSRYB473K16
C 422 CEAL220M16
C 801 CEAL100M16

C 802 CEAT471M16
C 803 CKSRYB224K16
C 806 CEAT471M16
C 807 CKSRYB473K16
C 808 CKSRYB103K50

C 809 CEAL220M16
C 810 CKSRYB104K16
C 811 0.1F/5.5V CCL1055
C 812 CKSQYB224K16
C 813 CKSRYB334K10

C 814 CEJA221M6R3
C 815 CEJA101M10
C 816 CEAS331M6R3
C 817 CKSRYB103K50
C 818 CKSRYB104K16

C 819 CKSRYB224K16

Unit Number : CWX2495
Unit Name : CD Core Unit

MISCELLANEOUS

IC 201 IC UPD63711GC
IC 202 IC BA05FP
IC 301 IC BA5986FM
IC 302 IC LB1836M
IC 603 IC BA4560F

IC 604 IC BA4560F
IC 701 IC PD5638A
IC 702 IC LC35256FT-70U
IC 703 IC HA12187FP
IC 704 IC PAJ002A

IC 705 IC TC7SH32F
Q 101 Transistor 2SB1132
Q 701 Transistor DTA144EK
Q 770 Transistor 2SB1184F5
Q 771 Transistor 2SC2412K

D 601 Diode UDZ7R5(B)
D 730 Diode 1SS356
D 770 Diode 1SS355
X 202 Ceramic Resonator 16.93MHz CSS1536
X 701 Radiator 10.00MHz CSS1428

S 801 Push Switch(EJECT) CSG1139
S 802 Push Switch(RESET) CSG1139
S 803 Spring Switch(MAG) CSN1044
VR 802 Semi-fixed 680Ω(B) CCP1337

RESISTORS

R 101 RS1/8S120J
R 102 RS1/8S100J
R 103 RS1/16S222J
R 201 RS1/16S104J
R 205 RS1/16S103J

=====Circuit Symbol and No.===Part Name Part No.

--- ------ ------------------------------------------ -------------------------

=====Circuit Symbol and No.===Part Name Part No.

--- ------ ------------------------------------------ -------------------------

A

36

CDX-FM1277,FM1279

R 206 RS1/16S393J
R 207 RS1/16S182J
R 213 RS1/16S103J
R 214 RS1/16S103J
R 215 RS1/16S123J

R 253 RS1/16S681J
R 254 RS1/16S681J
R 256 RS1/16S681J
R 257 RS1/16S681J
R 258 RS1/16S681J

R 259 RS1/16S102J
R 260 RS1/16S681J
R 298 RS1/16S681J
R 301 RS1/16S103J
R 302 RS1/16S153J

R 303 RS1/16S103J
R 304 RS1/16S103J
R 305 RS1/16S103J
R 306 RS1/16S752J
R 307 RS1/16S103J

R 308 RS1/16S752J
R 309 RAB4C332J
R 311 RS1/16S102J
R 651 RN1/16SE1502D
R 652 RN1/16SE1502D

R 653 RN1/16SE1502D
R 654 RN1/16SE1502D
R 659 RN1/16SE1202D
R 660 RN1/16SE1202D
R 661 RN1/16SE1202D

R 662 RN1/16SE1202D
R 663 RS1/16S103J
R 664 RS1/16S103J
R 665 RS1/16S103J
R 666 RS1/16S103J

R 669 RS1/16S101J
R 670 RS1/16S101J
R 671 RS1/16S752J
R 672 RS1/16S103J
R 673 RS1/16S271J

R 701 RS1/16S681J
R 702 RS1/16S102J
R 703 RS1/16S222J
R 704 RS1/16S563J
R 705 RS1/16S104J

R 706 RS1/16S222J
R 707 RS1/16S104J
R 708 RS1/16S0R0J
R 712 RS1/16S0R0J
R 714 RS1/16S0R0J

R 715 RS1/16S473J
R 716 RS1/16S103J
R 717 RS1/16S473J
R 718 RS1/16S681J
R 720 RS1/16S104J

R 721 RS1/16S222J
R 722 RS1/16S222J
R 724 RS1/16S681J
R 725 RS1/16S222J
R 726 RS1/16S104J

R 727 RS1/16S513J
R 729 RS1/16S473J
R 730 RS1/16S473J
R 731 RS1/16S222J
R 732 RS1/16S683J

R 733 RS1/16S222J
R 734 RS1/16S473J
R 735 RS1/16S222J
R 736 RS1/16S103J
R 737 RS1/16S433J

R 738 RS1/16S104J
R 739 RS1/8S1R0J
R 740 RS1/8S2R0J
R 741 RS1/16S102J
R 742 RS1/16S104J

R 743 RS1/16S104J
R 744 RS1/16S223J
R 747 RS1/16S472J
R 750 RAB4C473J
R 751 RAB4C473J

R 752 RS1/16S3602D
R 753 RS1/16S6801D
R 754 RS1/16S221J
R 755 RS1/16S104J
R 756 RS1/16S221J

R 759 RS1/16S472J
R 760 RS1/16S104J
R 761 RS1/16S104J
R 764 RS1/16S473J
R 765 RS1/16S471J

R 766 RS1/16S471J
R 767 RS1/16S471J
R 768 RS1/10S101J
R 769 RS1/10S101J
R 770 RS1/16S104J

R 801 RS1/10S221J
R 802 RS1/10S271J
R 804 RS1/16S512J
R 805 RS1/16S432J
R 806 RS1/16S102J

CAPACITORS

C 101 CKSRYB102K50
C 102 CKSRYB104K16
C 103 CEV101M6R3
C 104 CEV470M6R3
C 105 CKSRYB224K16

C 106 CKSRYB224K16
C 107 CKSRYB224K16
C 201 CKSRYB104K16
C 202 CEV101M6R3
C 203 CKSRYB104K16

C 204 CKSRYB332K50
C 205 CKSRYB104K16
C 206 CKSRYB392K50
C 207 CKSRYB104K16
C 208 CCSRCH270J50

C 209 CCSRCJ3R0C50
C 210 CCSRCH181J50
C 211 CCSRCH510J50
C 212 CKSRYB682K50
C 213 CKSRYB104K16

C 214 CKSRYB104K16
C 215 CKSRYB104K16
C 216 CKSRYB104K16
C 217 CKSRYB104K16
C 218 CKSRYB104K16

C 219 CKSRYB104K16
C 220 CKSRYB104K16
C 253 CKSRYB471K50
C 271 CEV101M6R3
C 272 10µF/16V CCH1399

=====Circuit Symbol and No.===Part Name Part No.

--- ------ ------------------------------------------ -------------------------

=====Circuit Symbol and No.===Part Name Part No.

--- ------ ------------------------------------------ -------------------------

37

CDX-FM1277,FM1279

C 273 CKSRYB224K16
C 301 CEV101M10
C 302 CKSRYB224K16
C 651 CCSRSL391J50
C 652 CCSRSL391J50

C 653 CCSRCH181J50
C 654 CCSRCH181J50
C 655 CCSRCH181J50
C 656 CCSRCH181J50
C 661 CKSRYB104K16

C 664 CKSRYB103K25
C 665 CEV470M6R3
C 666 CKSRYB103K25
C 702 CKSRYB473K16
C 703 CKSRYB473K16

C 707 CKSRYB103K25
C 708 CKSRYB104K16
C 710 CKSRYB103K25
C 711 CKSRYB102K50
C 712 CKSRYB102K50

C 714 CKSRYB104K16
C 715 22µF/10V CCH1403
C 717 CKSRYB103K25
C 718 CKSRYB103K25
C 719 CKSRYB102K50

C 720 CKSRYB102K50
C 721 CKSRYB103K25
C 722 CKSRYB103K25
C 723 CKSRYB104K16
C 724 CKSRYB471K50

C 725 CKSRYB473K16
C 727 CKSRYB473K16
C 801 CKSRYB103K25
C 802 CKSRYB104K16
C 803 CKSRYB103K25

Unit Number : CXB6806 (FM1277 model)

: CXB6807 (FM1279 model)

Unit Name : Display Assy

MISCELLANEOUS

IC 901 IC PD6294A
IC 902 IC TSOP1840SB1
Q 901 Transistor 2SD1767
Q 902 Transistor 2SB710A
Q 903 Transistor DTC114EK

D 901 Diode UDZS5R6(B)
D 902 Diode MA153
D 903 Diode MA153
X 901 Ceramic Resonator 4.9152MHz CSS1449
S 901 Switch CSG1110

S 902 Switch CSG1110
S 903 Switch CSG1110
S 904 Switch CSG1110
S 905 Switch CSG1110
S 906 Switch CSG1110

S 907 Switch CSG1110
IL 901 Lamp 14V 40mA CEL1608
IL 902 Lamp 14V 40mA CEL1608
LCD 901 LCD CAW1514

RESISTORS

R 901 RS1/16S102J
R 902 RS1/16S332J
R 903 RS1/16S471J
R 904 RS1/16S471J
R 905 RS1/16S332J

R 906 RS1/16S223J

CAPACITORS

C 901 CKSRYB473K16
C 902 CSZSR100M16
C 903 CSZSR100M16
C 904 CKSRYB104K16
C 905 CKSRYB104K16

C 906 CKSRYB104K16

Unit Number : CWX2580
Unit Name : Antenna Select Unit

MISCELLANEOUS

Q 501 Transistor 2SC1740S
D 501 Diode 1SS133
L 501 Ferri-Inductor LAU4R7K
RY 501 Relay CSR1014

RESISTORS

R 501 RD1/4PU683J
R 502 RD1/4PU103J

CAPACITORS

C 501 CKCYB102K50
C 502 CEAL101M10

Unit Number :
Unit Name : Mechanism PCB

Q 851 Photo-transistor PT4800
S 853 Spring Switch(HOME) CSN1051

Unit Number :
Unit Name : Switch PCB

D 851 LED CN504-2
S 851 Spring Switch(TAP) CSN1051
S 852 Spring Switch(DSP) CSN1052

Unit Number :
Unit Name : Motor PCB

M 853 Motor Unit(TRAY) CXB4421

Miscellaneous Parts List

Pickup Unit(P8)(Service) CXX1285
M 851 Motor Unit(SPINDLE) CXB3003
M 852 Motor Unit(ELV) CXB3006
M 854 Motor Unit(CARRIAGE) CXB3004
VR 801 Volume 10kΩ(B) CCW1024

=====Circuit Symbol and No.===Part Name Part No.

--- ------ ------------------------------------------ -------------------------

=====Circuit Symbol and No.===Part Name Part No.

--- ------ ------------------------------------------ -------------------------

C

D

E

G

F

38

CDX-FM1277,FM1279

- Precautions

• This unit uses a single power supply (+5V) for the reg­ulator. The signal reference potential, therefore, is
connected to REFO(approx. 2.5V) instead of GND.
If REFO and GND are connected to each other by mis­take during adjustments, not only will it be impossi­ble to measure the potential correctly, but the servo
will malfunction and a severe shock will be applied to
the pick-up. To avoid this, take special note of the fol­lowing.
Do not connect the negative probe of the measuring
equipment to REFO and GND together. It is especially
important not to connect the channel 1 negative
probe of the oscilloscope to REFO with the channel 2
negative probe connected to GND.
Since the frame of the measuring instrument is usual­ly at the same potential as the negative probe, change
the frame of the measuring instrument to floating sta­tus.
If by accident REFO comes in contact with GND,
immediately switch the regulator or power OFF.

• Always make sure the regulator is OFF when connect­ing and disconnecting the various filters and wiring
required for measurements.

• Before proceeding to further adjustments and mea­surements after switching regulator ON, let the player
run for about one minute to allow the circuits to stabi­lize.

• Since the protective systems in the unit's software are
rendered inoperative in test mode, be very careful to
avoid mechanical and /or electrical shocks to the sys­tem when making adjustment.

• Disc detection during tray extraction and return oper­ations is performed by means of the photo transistor
in this unit. Consequently, if the inside of the unit is
exposed to a strong light source with the outer casing
removed for repairs or adjustment, the following mal­functions may occur:

*Even with a disc loaded, the unit detects "no disc"

and cannot start play.

*Although a 12-cm disc is loaded, the unit detects

"8cm disc" mistakenly.
When the unit malfunctions this way, either re-posi­tion the light source, move the unit or cover the photo
transistor.

• During exchanging discs, do not press the keys for
the discs to be exchanged.

Key to adjustment text HEAD UNIT (6 keys type)
inside (12 keys type)

BAND BAND
TRK+/FF TRK+/FF
TRK-/REV TRK-/REV
71
82
93
10 4
11 5
12 6
DISC- DISC­SOURCE ON/OFF SOURCE ON/OFF

6. ADJUSTMENT

6.1 CD ADJUSTMENT

39

CDX-FM1277,FM1279

- CD Test mode

This mode is used for adjusting the CD mechanism
module of the device.

• Test mode starting procedure

Reset while pressing the 4 and 6 keys together.

• Test mode cancellation
Switch ACC, back-up OFF.

• If the 8 or 9 key is pressed while focus search is in
progress, immediately turn the power off (otherwise
the actuator may be damaged due to the lens stuck).

• Jump operation of TRs other than 100TR continues
after releasing the key. CRG move and 100TR jump
operations are brought into the “Tracking close” sta­tus when the key is released.

• Powering Off/On resets the jump mode to “Single TR
(91)”, the RF AMP gain setting to 0 dB, and the auto­matic adjustment value to the initial value.

• During exchanging discs, do not press the keys for
the discs to be exchanged.

• The following head units are exceptional so that their
entering ways to the test mode are different from oth­ers.
Test mode starting procedure
Reset while pressing the 3 and 5 keys together.

KEH-P5010R/X1M/EW
KEH-4011/X1M/EE
KEH-P5011/X1M/EE
KEH-4010R/X1M/EW
KEH-P4010RB/X1M/EW
KEH-P4013R/X1M/EW
KEH-5015/X1M/ES
KEH-P4010/X1M/UC
KEH-P4015/X1M/ES

40

CDX-FM1277,FM1279

Focus Close*2S Curve Check

01 01 0100 00 00

(99 99 99)

Display

TYP

4

9

Reset

SOURCE

New test mode

6

TRK-

BAND

9

*2

*1

+6dB +12dB

*4

*5

12

12

12

12

7

8

7

8TRK+

TRK+ TRK-

06 06 06 12 12 12

Sourse CD

Single TR

9x(8x):91(81)

32TRK

92(82)

CRG Move

94(84)

100TRK

93(83)

Focus Mode
Select

Focus Close/
S Curve Check

CRG−

Auto Adjustment
Display Select

<Tracking Servo Close> CRG+

RF AGC Coefficient Display/
Rough Servo and RF AGC

Tracking
Open

Display

Tracking
Open

T. Close and
Fit Servo

*3 F.Offset Display RF.Offset Display F.Cansel Display

*7

Single TR/32TR/100TR

Voltage of CRG Motor = 2 [V]

(F,T.AGC Gain = (Present Value/Initial Value) × 20)

*6

TRK+ TRK-

7

9

Display

8

9

Display

or

8x 8x 8x

TRK SECMIN

9x 9x 9x

TRK SECMIN

or

CRG−CRG+

T.Balance
Adjustment

*7

F, T, RF AGC/
F.Bias Display Select

F, T AGC and
RF AGC

CRG Move, 100TR Jump Only

TRK, MIN, SEC F.AGC Gain

RF AGC Gain

T.AGC Gain

*8

Power ON

(Adjustment for T.Offset)

*5

*4 *4

*6

CRG/TR Jump NO.
Select

CRG+/TR Jump+

CRG−/TR Jump−

Power OFF

Display

Display

Display

T.Close and
F,T AGC and
RF AGC and
Fit Servo

Display

Power ON

(Not adjustment for T.Offset)

Display

Display

8

RF AMP Gain Select

8

Power OFF

Power OFF

Power OFF

8x 8x 8x

TRK SECMIN

9x 9x 9x

TRK SECMIN

8x 8x 8x

TRK SECMIN

9x 9x 9x

TRK SECMIN

or

8x 8x 8x

TRK SECMIN

9x 9x 9x

TRK SECMIN

or

00 00 00

TRK SECMIN

99 99 99

TRK SECMIN

or

00 00 00

TRK SECMIN

99 99 99

TRK SECMIN

or

00 00 00

TRK SECMIN

99 99 99

TRK SECMIN

or

91 91 91

TRK SECMIN

0x 0x 0x

TRK SECMIN

00 00 00

TRK SECMIN

99 99 99

TRK SECMIN

GG GG GG

TRK SECMIN

Test Mode In

*1

*8 *3*8

F.Cancel Value = {Top Rank 8bit of Set Value (7F [H] to 80 [H] ) + 128} / 4
= 63 [D] to (32 [D] ) to 00 [D]

BAND

BAND

BAND

BAND

912FF7REV BAND

Display

< Mechanism test mode in >

Display

<ELV,TRAY select>

<Operation mode
select >

<Shift > <Shift >

*9 *12*11*10

<Mechanism test
mode out >

72 00 00

TRK SECMIN

TRK SECMIN

0X0072

*9 ELV motor select

*10

Display

TRAY motor select

0X1072

000072 010072 020072

8ms pulse drive

Display

24ms pulse drive DC drive

*11

001072

011072 021072

48ms pulse drive

Display

100ms pulse drive DC drive

ELV select : ELV dowm (Disc 12

→ 1)

TRAY select : TRAY out

*12 ELV select : ELV up (Disc 1

→ 12)

TRAY select : TRAY in

- Flow Chart

41

CDX-FM1277,FM1279

• Note :

CD mechanism modules the grating angle of the pickup unit cannot be adjusted after the pickup unit is changed.

The pickup unit in the CD mechanism module is adjusted on the production line to match the CD mechanism
module and is thus the best adjusted pickup unit for the CD mechanism module. Changing the pickup unit is thus
best considered as a last resort. However, if the pickup unit must be changed, the grating should be checked
using the procedure below.

• Purpose :

To check that the grating is within an acceptable range.

• Symptoms of Mal-adjustment :

If the grating is off by a large amount symptoms such as being unable to close tracking, being unable to perform

track search operations, or track searching taking a long time, may appear.

• Method :

• Measuring Equipment • Oscilloscope, Two L.P.F.

• Measuring Points • E, F, REFO

• Disc • ABEX TCD-784

• Mode • TEST MODE

• Checking Procedure

1. Enter Test mode, then select Multi-CD player and switch the 5V regulator on.

2. Using the TRK+ and TRK- buttons, move the pickup unit to the innermost track.

3. Press key 9 to close focus, the display should read "91". Press key 9 2 times. Enter Rough Servo mode. Press key
8 to implement the tracking balance adjustment the display should now read "81".

4. As shown in the diagram above, monitor the LPF outputs using the oscilloscope and check that the phase differ­ence is within 75° . Refer to the photographs supplied to determine the phase angle.

5. If the phase difference is determined to be greater than 75° try changing the pickup unit to see if there is any
improvement. If, after trying this a number of times, the grating angle does not become less than 75° then the
mechanism should be judged to be at fault.

• Note

Because of eccentricity in the disc and a slight misalignment of the clamping center the grating waveform may be

seen to "wobble" ( the phase difference changes as the disc rotates). The angle specified above indicates the aver­age angle.

• Hint

Change the disc changes the clamp position and may decrease the "wobble".

REFO

E

F

E

F

L.P.F.

L.P.F.

CD CORE UNIT

Xch

Ych

Oscilloscope

100kΩ

100kΩ

390pF

390pF

6.2 CHECKING THE GRATING

- Checking the Grating After Changing the Pickup Unit

42

CDX-FM1277,FM1279

Grating waveform

45˚

0˚

75˚

60˚

30˚

90˚

Echt Xch 20mV/div, AC
Fcht Ych 20mV/div, AC

43

CDX-FM1277,FM1279

• Note :

This mechanisms is detects the height of the stage using slide-variable resistance.
To absorb dislocation of the stage height caused by differences in the mechanism and the CD core unit, adjustment
must be made for each CD-mechanism module using a variable resistor.
Normally, readjustment is not needed, as this has been adjusted at the factory. However, adjustment of elevation is
required according to the procedure explained below if an elevation error has occurred or if the CD core unit has
been removed.

• Purpose :

To adjust and confirm whether or not elevation operates correctly.

• Adjustment Method :

• Measuring Equlpment: Oscilloscope, One L.P.F.

• Measuring Points : EREF, EPVO

• Setting : Without a magazine in Test mode
With the mechanism placed upside-down (Place the CD mechanism module so that the CD
core unit is above.)

• Confirmation Procedure

1. Enter Test mode, then select Multi-CD player.

2. Press key 7 to enter Mechanism Test mode.

3. Press key 12 twice to specify the amount of movement.

6.3 ADJUSTMENT OF ELEVATION WHEN THE CD CORE UNIT HAS BEEN REMOVED
FOR MAINTENANCE

- Adjustment When Error Code 60 is Displayed Because of Malfunctioning Elevation

TRACK FUNCTION

'"

TRACK FUNCTION

72 00' 00"

EREF

EPVO

Oscilloscope

CD CORE UNIT

L.P.F.

47kΩ

1µF

Examples of display

TRACK FUNCTION

72 00' 02"

TRACK FUNCTION

72 00' 01"

The amount of movement
changes each time key 12 is
pressed.

maximum movement

i

Key 12

i

during movement

i

Key 12

i

minimum movement

TRACK FUNCTION

72 00' 00"

i

i

Key 12

44

CDX-FM1277,FM1279

4. Press key 9 to set ELV/TRAY mode to TRAY.

5. Press key FF to release the clamp and return the tray to the magazine.

6. Press key 9 to enter Elevation Move mode.

7. Use key FF/REV to operate elevation and set if to the graduation of the sixth step

(Fig. 1).

8. Make the adjustment.
Use VR802 to adjust the difference in potential between EREF and EPVO to 0 ±10
mV.

9. When adjustment is completed, press key BAND to exit Mechanism Test mode.

10. Confirm operation of the mechanism.
Place the mechanism horizontally (CD core unit below). Take care not to short-cir­cuit the PCB.

11. Confirm the height of the stage. Use the DISC± key to select Disc No.6.

Check if the stopper bend of the clamp lever is engaged in the groove of the frame
stopper (Fig. 2-4).

• Note :

The stopper bend will be pressed downward into the groove for final clamping. Confirm the engagement position
of the stopper bend.

• If the stopper bend is engaged in the center and pressed downward, adjustment is completed. Go to step 15.

• If the stopper bend is dislocated, check the amount of dislocation by following steps 12 to 14.

TRACK FUNCTION

72 00' 02"

TRACK FUNCTION

72 00' 02"

TRACK FUNCTION

'"

TRACK FUNCTION

04 00' 00"

Examples of display

TRACK FUNCTION

72 01' 02"

Release the clamp

45

CDX-FM1277,FM1279

12. To see the amount of dislocation, place the mechanism upside-down.
If the stopper bend has been dislocated in the direction of the first
CD, turn VR802 to the left(Fig. 2).

To lower the stage toward the twelfth step by 0.1 mm, reduce the
voltage of EREF (adjusted in step 8) by 10 mV.

If the stopper bend has been dislocated in the direction of the twelfth
CD, turn VR802 to the right(Fig. 4).

To raise the stage toward the first step by 0.1 mm, increase the volt­age of EREF (adjusted in step 8) by 10 mV.

13. Place the mechanism horizontal. Go back to step 11 to reconfirm the
stage height.

14. When adjustment of the stage height is completed, proceed as fol­lows:

15. Press the EJECT switch.

16. Once operation of the mechanism has stopped, turn the power OFF.

17. Wait more than one minute after the power is turned off, then turn the power ON and insert a magazine.

18. Check if the mechanism operates correctly with the first, sixth, seventh and twelfth CDs.

19. If the mechanism operates properly, adjustment is completed. If the mechanism operates improperly, make the
adjustment again.

GND

EREF

VR802

1µF

47kΩ

Oscilloscope

L.P.F.

46

CDX-FM1277,FM1279

NG

Stopper bend of the
clamp lever

Frame stopper

OK

Engaged in the center and pressed downward.

NG

Fig. 1

Dislocated toward the first CD.

Adjust the insertion gate of magazine to
the sixth scale.

Dislocated toward the twelfth CD.

Fig. 2

Fig. 3

Fig. 4

E

12346 5789BC

47

CDX-FM1277,FM1279

6.4 MODULATOR ADJUSTMENT

- Connection Diagram

- Adjustment

Note: When ajusting, the frequency is made 89.1MHz.

CD Signal Adjusting Point Adjustment Method Notes

Tuning Voltage -∞ L402 DC V Meter:TV
Adjustment 3.0V±0.1V
Balance Adjustment -∞ VR301 Oscilloscope:BAL

38kHz signal becomes minimum
Modulation 400Hz 0dB (*1) VR302 Linear Detector(Spectrum Analyzer) LEVEL = 7
Adjustment or 135±5kHz

499Hz 0dB or

Oscilloscope:MOD

0.23Vpp

*1 : L and R are input at the same time.

VR302

CN801

CN401

CN802

Linear Detector

L302

MOD

(Spectrum Analyzer)

FM Tuner

DC V Meter

Antenna
Jack

VR301

Antenna
Plug

ANTENNA OUT

BAL

ANTENNA
SELECT
UNIT

TV

Oscilloscope

L402

CN201

CN803

EXTENSION UNIT

ACC

DC Regulated
Power Supply

BACK UP

GND

48

CDX-FM1277,FM1279

- Error Messages

If a CD is not operative or stopped during operation due to an error, the error mode is turned on and cause(s) of the
error is indicated with a corresponding number. This arrangement is intended at reducing nonsense calls from the
users and also for facilitating trouble analysis and repair work in servicing.

(1) Basic Indication Method

1) When SERRORM is selected for the CSMOD (CD mode area for the system), error codes are written to DMIN (min­utes display area) and DSEC (seconds display area). The same data is written to DMIN and DSEC. DTNO remains
in blank as before.

2) Head unit display examples
Depending on display capability of LCD used, display will vary as shown below. xx contains the error number.

8-digit display 6-digit display 4-digit display

ERROR–xx ERR–xx E–xx

OR

Err–xx

* When the system is manufactured for an OEM basis, the error display will be configured according to the customer

specification.

(2) Error Code List

Code Class Displayed error code Description of the code and potential cause(s)
10 Electricity Carriage Home NG CRG can't be moved to inner diameter.

CRG can't be moved from inner diameter.

→ Failure on home switch or CRG move mechanism.

11 Electricity Focus Servo NG Focusing not available.

→ Stains on rear side of disc or excessive vibrations on REWRITABLE.

12 Electricity Spindle Lock NG Spindle not locked. Sub-code is strange (not readable).

→ Failure on spindle, stains or damages on disc, or excessive vibrations.

Subcode NG A disc not containing CD-R data is found. Turned over disc are found,

though rarely.

→ Failure on home switch or CRG move mechanism.

RF AMP NG An appropriate RF AMP gain can't be determined.

→ CD signal error.

17 Electricity Setup NG APC protection doesn't work. Focus can be easily lost.

→ Damages or stains on disc, or excessive vibrations.

30 Electricity Search Time Out Failed to reach target address.

→ CRG tracking error or damages on disc.

A0 System Power Supply NG Power (VD) is ground faulted.

→ Failure on SW transistor or power supply (failure on connector).

A1 System Mechanism power Mechanism elevation reference voltage is out of

failure prescription.

→EREF adjustment VR and/or power abnormal.

7. GENERAL INFORMATION

7.1 DIAGNOSIS

7.1.1 TEST MODE

49

CDX-FM1277,FM1279

Code Class Displayed error code Description of the code and potential cause(s)
50 Mecha- An error upon MAG switch release time has time out.

nism ejection Elevation time out when eject.

60 Mecha- An error while putti- Tray in / out time has time out.

nism ng in and out the tray Tray is caught when put in.

70 Mecha- An error upon Elevation time has time out.

nism elevation

80 Mecha- An error with an em- No disc is available.

nism pty magazine inserted

Remarks: Unreadable TOC does not constitute an error. An intended operation continues in this case.

A newly designed head unit must conform to the example given above.
Upper digits of an error code are subdivided as shown below:
1x: Setup relevant errors, 3x: Search relevant errors, 3x: Search relevant errors, Ax: Other errors.

- New Test Mode

M-CD plays the same way as before.
If an error such as off focus, spindle unlocking, unreadable sub-code, or sound skipping occurs after setup, its
cause and time occurred (in absolute time) are displayed.
During setup, operational status of the control software (internal RAM: CPOINT) is displayed.
These displays and functions are prepared for enhancing aging in the servicing and efficiency of trouble analysis.

(1) Shifting to the New Test Mode

1 Turn on the current test mode by starting the reset from the 4 and 6 keys together.
2 Select M-CD for the source through the specified procedure including use of the [SOURCE] key. Then, press the

12 key while maintaining the regulator turned off.

3 After the above operations, the new test mode remains on irrespective of whether the M-CD is turned on or off.

You can reset the new test mode by turning on the reset start.

* With some products, the new test mode can be reset through the same operations as that employed for shifting to

the STBY mode (while maintaining the Acc turned off).

(2) Key Correspondence

Key Test mode New test mode

(Example) Power Off Power On In-play Error Production

BAND To power on To power off – Time/Err.No. switching

(offset adjustment performed)

UP – FWD-Kick FF/TR+ –

DOWN – REV-Kick REV/TR- –

7 – T.Close (AGC performed) Scan –

/parameter display switching

8 RF AMP gain switching Parameter display switching Mode –

/T.BAL adjustment/T.Open

9 To power on F.Close/RF AGC/F.T.AGC – –

(offset adjustment not performed)
10 – F.Open – –
11 – Jump Off – –
12 – F.Mode switching Auto/Manu T.No./Time switching

/T.Close (no AGC)/Jump switching

50

CDX-FM1277,FM1279

Key Mechanism Test Mode

(Example)

BAND Back to the test mode

UP Playing the mechanism

DOWN Playing the mechanism

7 Mechanism test mode in
8–

9 TRAY/ELV select
10 –
11 –
12 Operation step select

Note: Eject and CD on/off is performed in the same procedure as that for the normal mode.

(3) Cause of Error and Error Code

Code Class Contents Description and cause
40 Electricity Off focus detected. FOK goes low.

→ Damages/stains on disc, vibrations or failure on servo.

41 Electricity Spindle unlocked. FOK = Low continued for 50 msec.

→ Damages/stains on disc, vibrations or failure on servo.

42 Electricity Sub-code unreadable. Sub-code was unreadable for 50 msec.

→ Damages/stains on disc, vibrations or failure on servo.

43 Electricity Sound skipping detected. Last address memory function was activated.

→ Damages/stains on disc, vibrations or failure on servo.

Note: Mechanical errors during aging are not displayed.

The error codes should be indicated in the same way as in the normal mode.

(4) Display of Operational Status (CPOINT) during Setup

Status No. Contents Protective action
00 CD+5V ON process in progress. None
01 Servo LSI initialization (1/3) in progress. None
02 Servo LSI CRAM initialization in progress. None
03 Servo LSI initialization (2/3) in progress. None
04 Offset adjustment (1/3) in progress. None
05 Offset adjustment (2/3) in progress. None
06 Offset adjustment (3/3) in progress. None
07 FZD adjustment in progress. None
08 Servo LSI initialization (3/3) in progress. None
10 Carriage move to home position started. None
11 Carriage move to home position started. None
12 Carriage is moving toward inner diameter. Specified 10 seconds has been passed or failure

on home switch.

13 Carriage is moving toward outer diameter. Specified 10 seconds has been passed or failure

on home switch.
14 Carriage outer kick in progress. None
15 Carriage outer diameter feed (1 second) in progress. None
20 Servo close started. None
21 Pre-processing for focus search started. None
22 Spindle rotation and focus search started. None
23 Waiting for focus close (XSI=Low). Specified focus search time has been passed.
24 Standing by after focus close is over. Specified focus search time has been passed.
25 Focus search preprocessing is in None

progress while setup protection is turned on.

51

CDX-FM1277,FM1279

Status No. Contents Protective action
26 Focus search preprocessing is in None

progress while focus recovery is turned on.
27 Wait time after focus close is set up. Off focus.
28 Standing by after focus close is over. Off focus.
29 Setup (1/2) before T balance adjustment is started. Off focus.
30 Setup (2/2) before T balance adjustment is started. Off focus.
31 T balance adjustment started. Off focus.
32 T balance adjustment (1/2). Off focus.
33 T balance adjustment (2/2). Off focus.
34 Waiting for spindle rotation to end. Off focus.

Spindle rough servo.
35 Standing by after spindle rough servo is over. Off focus.
36 RF AGC started. Off focus.
37 RF AGC started. Off focus.
38 RF AGC ending process in progress. Off focus.
39 Tracking close in progress. Off focus.
40 Standing by after tracking is closed. Off focus.

Carriage closing in progress.
41 Focus/tracking AGC started. Off focus.
42 Focus AGC started. Off focus.
43 Focus AGC in progress. Off focus.
44 Tracking AGC in progress. Off focus.
45 Standing by after focus/tracking AGC are over. Off focus.
46 Spindle processes applicable servo. Off focus.
47 Check for servo close is started. Off focus.
48 Check of LOCK pin started. Off focus or spindle not locked.
49 RF AGC started. Off focus.
50 RF AGC in progress. Off focus.
51 Standing by after RF AGC is over. Off focus.

(5) Display Examples

1) During Setup (When status no. = 11)
TRK No. MIN. SEC.

11 11' 11"

2) During Operation (TOC read, TRK search, Play, FF and REV)

The same as in the normal mode.

3) When a Protection Error Occurred

Switch to the following displays (A) and (B) using the [BAND] switch:

(A) Error occurrence timing display in absolute time.
An example: Error occurred in 12th tune at 34'56" in absolute time.

TRK No. MIN. SEC.

12 34' 56"

(B) Error No. display
An example: Error #40 (Off focus is detected)
ERROR-40

52

CDX-FM1277,FM1279

7.1.2 DISASSEMBLY

- Removing the Extension Unit (Fig.6)

Remove the two screws.

Remove the screw.

Straight the tabs at location indicated

and then remove the Extension Unit.

-

Removing the Upper Case (not shown)

1. Remove the nine screws.

2. Remove the Upper Case.

- Removing the CD Mechanism Module

(Fig.5)

Remove the four dampers.

Remove the two springs.

Disconnect the connector and then remove

the CD Mechanism Module.

Fig.6

CD Mechanism Module

Fig.5

Extension Unit

- Removing the Door

1. Remove the Door(A) in the direction of arrow2 while
pushing the Grille in the direction of arrow1, the slide
is done as it is in the direction of arrow3 and remove
the Door(A). (Fig.7)

Fig.7

Door(A)

Grille

53

CDX-FM1277,FM1279

- Removing the Pickup Unit

1. Insert the short pin from the pickup unit in the flexible PCB.

2. Remove the flexible PCB from the connector.

3. Remove the flexible card from the connector.

4. Remove the lead wires to which the spindle motor and carriage motor assy were soldered.

5. Remove the two screws and lift the mechanism PCB up as shown in the figure on the upper right.
At this time, make sure that the motor PCB and flexible relay card are not pulled excessively.

6. Remove screw A and then remove the carriage motor assy, lighting conductor, feed screw holder, feed screw and
belt (see Fig.10).

7. Remove screw B on the main side and the pickup unit together with the guide shaft (see Fig.10).

Fig.9

Flexible card

Erect

Flexible relay card (han­dle with care)

Motor PCB (handle
with care)

Short Pin

Mechanism PCB

Screw A

Motor bracket

CRG motor

Screw A

Feed screw holder

Feed screw

Guide shaft (main)

Guide shaft (sub)

Belt

Screw B

Pickup unit

Fig.10

Lighting conductor

2. The slide is done in the direction of arrow5 and

remove the Door(B) while spread out the Door(A) in the
direction of arrow4. (Fig.8)

*) The illustration of the text for 12-Disc type but disas-

sembling method is the same for 6-Disc type.

Fig.8

Door(A)

Door(B)

Flexible PCB

54

CDX-FM1277,FM1279

7.1.3 CONNECTOR FUNCTION DESCRIPTION

8 9 10 11

56 7

1234

1

2

3

4

5

1.SWDACC

2.KYDT

3.DPDT

4.FMIPSW

5.GND

1.BUS+

2.GND

3.GND

4.NC

5.BUS-

6.GND

7.LCH

8.ASENB

9.RCH

10.SGNDR

11.SGNDL

123

1.GND

2.ACC

3.BATT.

DISPLAY

IP-BUS

POWER SUPPLY

ANTENNA

55

CDX-FM1277,FM1279

7.2 PARTS

7.2.1 IC

- Pin Functions (PD5638A)

Pin No. Pin Name I/O Format Function and Operation

1 PLDT O C PLL data output
2 PLCK O C PLL clock output
3 adena O C A/D reference voltage output
4 TXTSTB O C TEXT parameter output
5 TXTSO O C TEXT control parameter serial output
6 TXTSI I TEXT data serial input
7 TXTSCK O C TEXT clock output
8 BYTE I VCC joint

9 CNVSS I VSS joint
10 POWER O C CD +5V control output
11 CONT O C Servo driver output control
12 reset I Reset input
13 XOUT O Crystal oscillating element connection pin
14 VSS GND
15 XIN I Crystal oscillating element connection pin
16 VCC VDD
17 nmi I Pull up
18 bsens I Back up power sense input
19 asens I Acc sense input
20 TXTPACK I TEXT PACK interrupt input
21 IPTA4IN I IPIN joint
22 IPPW O C Power supply control output for IP-BUS interface IC
23 DISPPW O C Key/Display microcomputer supply control
24 OPTSEL I Pull down
25 SRAMSW I ”H”
26 FMPCB I Pull up
27 SIMUKE I ”L”
28 NC Not used
29 IPIN I Data input from IP-BUS interface IC
30 IPOUT O C Data output for IP-BUS interface IC
31 DPDT O C Display data output
32 KYDT I Key data input
33 FMIPSW I FM/IP-BUS select switch
34 testin I Test program mode input
35 XSO O C CD LSI data output
36 XSI I CD LSI data input
37 XSCK O C CD LSI clock output
38 M6M12 I 6/12 disc select input

39–43 NC Not used

44 rd O C SRAM enable output
45 NC Not used
46 wr O C SRAM write enable output
47 SYSPW O C System power supply control output
48 cs O C SRAM chip select output
49 XAO O C CD LSI data discernment control signal output
50 xstb O C CD LSI strobe output
51 xrst O C CD LSI reset output
52 NC Not used
53 LOCK I Spindle lock detector input
54 FOK I FOK signal input
55 NC Not used
56 A11 O C SRAM address bus output
57 A9 O C SRAM address bus output
58 A8 O C SRAM address bus output
59 A13 O C SRAM address bus output
60 A14 O C SRAM address bus output
61 A12 O C SRAM address bus output
62 VCC VDD

56

CDX-FM1277,FM1279

Pin No. Pin Name I/O Format Function and Operation

63 A7 O C SRAM address bus output
64 VSS GND

65–68 A6-A3 O C SRAM address bus output

69 A10 O C SRAM address bus output
70 A2 & (EPSK) O C SRAM address bus output and (E2PROM clock output)
71 A1 & (EPDI) O/I C SRAM address bus output and (E2PROM data input)
72 A0 & (EPDO) O C SRAM address bus output and (E2PROM data output)
73 asensfm I Select FM=”ASENS”
74 ejsw I Eject key switch interrupt input
75 mag I Magazine lock switch interrupt input
76 CDMUTE O C CD mute output
77 NC Not used
78 I13 O C Motor driver control output
79 I2 O C Motor driver control output
80 I4 O C Motor driver control output

81–88 D0-D7 I/O C SRAM data bus input/output

89 PREN O C Preemphasis select output
90 PLCS O C PLL chip select output
91 DSP I DISC detect timing input
92 disk Disc detector input
93 ELVPVO Voltage input from ELV position sense
94 ELVREF ELV reference voltage input
95 TRP I Tray position input
96 AVSS A/D GND
97 VDIN Power supply short sensor input
98 VREF I A/D converter reference voltage input
99 AVCC A/D VCC

100 EPCS I/O C E2PROM detect input , Chip select output

*PD5638A

Format Meaning
C C MOS

30

31

50

51

80

81

100

1

LC35256FT-70U

1

2

3

4

5

6

7

8

9

1011121314

28272625242322212019181716

15

A14

A12

A7A6A5A4A3A2A1

A0

IO1

IO2

IO3

GND

VDDWEA13A8A9

A11OEA10CSIO8

IO7

IO6

IO5

IO4

A0-A14 : Address input
IO1-IO8 : Data input/output

VDD : Power supply
GND : GND

CS: Chip select

OE : Output enable
WE : Write enable

TC7SH32F

1 IN B

2 IN A

3 GND

4 OUT Y

5 VCC

IC's marked by* are MOS type.
Be careful in handling them because they are very
liable to be damaged by electrostatic induction.

57

CDX-FM1277,FM1279

7.2.2 DISPLAY

- CAW1514

COMMON

SEGMENT

58

CDX-FM1277,FM1279

7.3 OPERATIONAL FLOW CHART

VDD=5V

Pin16

BATT ON

bsens

Pin18

mag

Pin75

Source keys
operative

Starts communication with Grille microcomputer.

Source ON

bsens=L

POWER←H Pin10

adena←L Pin3

VD IN
Pin96

1.3V VD IN 2.1V

mag=L

DISC Search

POWER←L Pin10

asens

Pin19

DISPPW←H Pin23

POWER←H Pin10

adena←L Pin3

VD IN
Pin96

1.3V VD IN 2.1V

POWER←L

Stand-by

Error message "A0"

Error message "A0"

Start the CD player

59

CDX-FM1277,FM1279

8. OPERATIONS AND SPECIFICATIONS

8.1 OPERATIONS

A B

D

C

FE

Parts for connection

1.Switch the radio on and tune to
Modulating Frequencies.

• The initial value is 89.1 MHz.

• If your radio does not have muting, there
may be some noise before power switch
of control unit is ON. If this happens, turn
down the volume of the radio.

: increase the number.

: decrease the number.

2.Press button to switch on and start
the player.

Start the CD player

Disc Number Search

or

or

Disc Number

60

CDX-FM1277,FM1279

D

A

C

B

F

E

Yellow

To the terminal always supplied with power

regardless of ignition switch position.

Red

To electric terminal controlled by ignition switch

(12 V DC) ON/OFF.

Black (ground)

To the vehicle (metal) body.

Fuse holder

Display unit

CD Player unit

Car antenna plug

To FM car radio

Antenna switching unit

Resistor

Pass leads and

cords through.

Pass leads and cords through D and

fix in place.

<

IP-BUS OUTPUT

>

550 cm

100 cm

540 cm

30 cm

50 cm

Choke coil

Cords for this product and those for other products

may be different colors even if they have the same

function. When connecting this product to another

product, refer to the supplied Installation manuals

of both products and connect cords that have the

same function.

Connecting the Units

61

CDX-FM1277,FM1279

8.2 SPECIFICATIONS

CD Player unit

System ........... Compact disc audio system

Usable discs .......................... Compact Disc

Signal format

.................. Sampling frequency: 44.1 kHz

Number of quantization bits: 16; linear

Power source

........ 14.4 V DC (10.8 — 15.1 V allowable)

Max. current consumption ................. 1.0 A

Weight .................................. 2.2 kg (4.9 lbs)

Dimensions

.................. 257 (W) × 94 (H) × 170 (D) mm

[10-1/8 (W) × 3-3/4 (H) × 6-3/4 (D) in]

FM modulator usable frequency

.............. 87.9/88.1/88.3/88.5/88.7/88.9/89.1

/89.3/89.5/89.7/89.9/90.1 MHz

Backup current ......................... 1mA or less

Antenna Switching unit

Weight ................................... 140 g (0.3 lbs)

Dimensions

...................... 45 (W) × 25 (H) × 43 (D) mm

[1-3/4 (W) × 1 (H) × 1-5/8 (D) in]

Display unit

Weight ..................................... 78 g (0.2 lbs)

Dimensions

.....................100 (W) × 37 (H) × 18 (D) mm

[3-15/16 (W) × 1-7/16 (H) × 5/8 (D) in]

Remote Controller unit

Power source

........................................ Battery (CR2025)

Weight (including battery)

............................................. 15 g (0.03 lbs)

Dimensions

....................... 36 (W) × 92 (H) × 9 (D) mm

[1-2/5 (W) × 3-5/8 (H) × 1/3 (D) in]

Note:

Specifications and the design are subject
to possible modification without prior
notice due to improvements.