Pioneer KEH-P7900R X1N User manual

CONTENTS
1. SAFETY INFORMATION ............................................2
2. EXPLODED VIEWS AND PARTS LIST .......................2
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM...10
4. PCB CONNECTION DIAGRAM ................................32
5. ELECTRICAL PARTS LIST ........................................44
6. ADJUSTMENT..........................................................62
7. GENERAL INFORMATION .......................................63
7.1 DISASSEMBLY ...................................................63
7.2 IC ........................................................................65
7.3 OPERATIONAL FLOW CHART ...........................72
8. OPERATIONS AND SPECIFICATIONS.....................73
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
ORDER NO.
CRT2458
MULTI-CD/DAB CONTROL HIGH POWER CASSETTE PLAYER WITH RDS TUNER
KEH-P7900R X1N/EW
Service
Manual
KEH-P7900R/X1N/EW
-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
KEH-P7910R X1N/EE
KEH-P7950 X1N/ES
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.
MULTI-CD/DAB CONTROL HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER

2
KEH-P7900R,P7910R,P7950
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
13
14
10
8
12
11
9
1
2
6
5
7
4
3
-KEH-P7900R/X1N/EW, KEH-P7910R/X1N/EE
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.

3
KEH-P7900R,P7910R,P7950
1 Cord Assy(EW) CDE6284
Cord Assy(EE) CDE6285
2 Inner Box CHW1754
3 Accessory Assy CEA1917
4 Screw CBA1304
5 Handle CNC5395
6 Bush CNV3930
* 7 Polyethylene Bag E36-615
8 Polyethylene Bag CEG-162
9 Carton(EW) CHG4027
Carton(EE) CHG4028
10 Contain Box(EW) CHL4027
Contain Box(EE) CHL4028
11 Protector CHP2251
12 Protector CHP2252
13-1 Polyethylene Bag CEG1116
13-2 Owner’s Manual(EW) CRD3180
Owner’s Manual(EE) CRD3187
13-3 Owner’s Manual(EW) CRD3181
13-4 Owner’s Manual(EW) CRD3182
13-5 Installation Manual(EW) CRD3183
Installation Manual(EE) CRD3188
* 13-6 Passport(EW) CRY1013
* 13-7 Warranty Card CRY1157
* 13-8 Caution Card CRP1207
* 13-9 Caution Card(EE) CRP1216
14 Case Assy CXB3520
Mark No. Description Part No. Mark No. Description Part No.
-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.
-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

4
KEH-P7900R,P7910R,P7950
-KEH-P7950/X1N/ES
1 Carton CHG4029
2 Cord Assy CDE6231
* 3 Accessory Assy CEA2350
4 Spring CBH1650
* 5 Screw Assy CEA2351
6 Screw CBA1304
* 7 Polyethylene Bag CEG-127
8 Screw CRZ50P090FMC
9 Screw TRZ50P080FMC
* 10 Polyethylene Bag CEG-158
11 Handle CNC5395
12 Bush CNV3930
13 Base Assy CEA2426
* 14 Base CNS5031
* 15 Sheet CZA3371
16 Polyethylene Bag CZE3188
17 Polyethylene Bag CEG-162
18 Battery CEX1006
19 Contain Box CHL4029
20 Protector CHP2251
21 Protector CHP2252
22 Case Assy CXB3520
23 Inner Box CHW1759
24-1 Polyethylene Bag CEG1116
24-2 Owner’s Manual CRD3184
24-3 Owner’s Manual CRD3185
24-4 Installation Manual CRD3186
* 24-5 Caution Card CRP1207
* 24-6 Caution Card CRP1216
25 Remote Control Assy CXB3875
Mark No. Description Part No. Mark No. Description Part No.
-PACKING SECTION PARTS LIST
24
22
19
17
21
20
5
8
12
4
11
10
9
7
6
3
1
2
14
16
15
13
18
25
23
-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

5
KEH-P7900R,P7910R,P7950
2.2 EXTERIOR
KEH-P7900R/X1N/EW

6
KEH-P7900R,P7910R,P7950
1 Screw BMZ30P040FZK
2 Screw BSZ26P050FMC
3 Screw BSZ30P050FMC
4 Screw BSZ30P200FMC
5 Cord Assy CDE6233
6 Cord Assy See Contrast table(2)
7 Fuse(10A) CEK1136
8 Cap See Contrast table(2)
9 Cap CNS1472
10 Resistor RS1/2PMF102J
11 Screw ISS26P055FUC
12 Case CNB2597
13 Holder CNC6798
14 Holder See Contrast table(2)
15 Spacer See Contrast table(2)
16 Insulator CNM6640
17 Panel See Contrast table(2)
18 Cap CNV2680
19 Tuner Amp Unit See Contrast table(2)
20 Screw BPZ26P060FMC
21 Screw BSZ26P060FMC
22 Screw BSZ26P160FMC
23 Cord Assy CDE5852
24 Clamper CEF1007
25 Pin Jack(CN351) CKB1028
26 Terminal(CN403) CKF1059
27 Plug(CN901) CKM1278
28 Jack(CN451) CKN1027
29 Plug(CN352) CKS1238
30 Connector(CN751) CKS3124
31 Connector(CN101) CKS3408
32 Plug(CN801) CKS3537
33 Connector(CN251) CKS3568
34 Jack(CN452) CKS4061
35 Antenna Jack(CN401) CKX1056
36 Panel CNB2547
37 Holder See Contrast table(2)
38 Holder CNC7996
39 Case CNC8138
40 Case CNC8301
41 Holder CNC8696
42 Insulator See Contrast table(2)
43 Insulator CNM6249
44 Insulator CNM6250
45 Insulator CNM6875
46 Heat Sink CNR1505
47 Holder CNV5375
48 FM/AM Tuner Unit See Contrast table(2)
49 Holder CNC7532
50 Detach Grille Assy See Contrast table(2)
51 Screw BPZ20P100FZK
52 Knob CAA1525
53 Button(SOURCE) CAC6331
54 Button(OPEN) CAC6333
55 Button(F,A) See Contrast table(2)
56 Button(DISP) See Contrast table(2)
57 Button(BAND) See Contrast table(2)
58 Button(E) CAC6464
59 Spring CBH2316
60 Spring CBH2320
61 Cushion CNM6542
62 Spacer CNM6943
63 Cover See Contrast table(2)
64 Holder CNV6177
65 Keyboard Unit See Contrast table(2)
66 Connector(CN1901) CKS4205
67 Holder CNC8698
68 Cushion CNM6633
69 Spacer CNM6710
70 Spacer CNM6711
71 Sheet CNM6746
72 Holder CNV6105
73 OEL Unit MXR8004
74 Knob Unit See Contrast table(2)
75 Grille Unit See Contrast table(2)
76 Button(EJECT) CAC6327
77 Door CAT2109
78 Screw(M2x2) CBA1176
79 Washer CBF1038
80 Spring CBH1838
(1) EXTERIOR SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
KEH-P7950/X1N/ES KEH-P7910R/X1N/EE

7
KEH-P7900R,P7910R,P7950
(2) CONTRAST TABLE
KEH-P7900R/X1N/EW, KEH-P7910R/X1N/EE and KEH-P7950/X1N/ES are constructed the same except for
the following:
81 Spring CBH2310
82 Spring CBH2312
83 Spring CBH2313
84 Spring CBH2393
85 Spring CBL1492
86 Holder CNC8560
87 Cushion CNM5486
88 Spacer CNM6811
89 Panel CNS5728
90 Arm CNV5991
91 Arm CNV5992
92 Arm CNV5993
93 Lever CNV5994
94 Gear CNV5995
95 Gear CNV5996
96 Gear CNV5997
97 Pin CNV6027
98 Panel PCB Unit CWM6720
99 Socket(CN605) CKS3550
100 Connector(CN604) CKS4206
101 Damper Unit CXB5070
102 Holder Unit CXB5736
103 Holder Unit CXB5737
104 Screw IMS20P045FZK
105 Chassis Unit See Contrast table(2)
106 Cassette Mechanism ModuleEXK4010
107 IC(IC301) PAL005A
108 Transistor(Q921) 2SD2396
109 Chock Coil(L901) CTH1171
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
Mark No. Description Part No. Mark No. Description Part No.
Part No.
Mark No. Symbol and Description 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

8
KEH-P7900R,P7910R,P7950
2.3 CASSETTE MECHANISM MODULE

9
KEH-P7900R,P7910R,P7950
Mark No. Description Part No. Mark No. Description Part No.
-CASSETTE MECHANISM MODULE SECTION PARTS LIST
1 Screw BSZ20P040FMC
2 Washer CBF1037
3 Washer CBG1003
4 Screw EBA1028
5 Screw EBA1037
6 Spring EBH1531
7 Spring EBH1624
8 Spring EBH1625
9 Spring EBH1626
10 Spring EBH1627
11 Spring EBH1629
12 Cord EDD1024
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
46 Pinch Roller ENV1518
47 Pinch Holder Unit EXA1583
48 Pinch Roller ENV1518
49 Reel Unit EXA1585
50 Head Base Unit EXA1586
51 Lever Unit EXA1587
52 Gear Unit EXA1588
53 Motor Unit(Service) EXX1055
54 Washer HBF-179
55 •••••
56 •••••
57 Arm ENC1537

10
KEH-P7900R,P7910R,P7950
1234
1234
D
C
B
A
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM
BFM/AM TUNER UNIT
ATUNER AMP UNIT
CN401
IC 101
CA0008AM
IC 453
NJM2068MD
IC 961
S-80734ANDY-I
RESET
IP-BUS DRIVER
RDS
DECODER
VDD
M
M
CN252
CN254
CN255
CN256
CN253
CN251 CN251
EQ AMP
MECHANISM
DRIVER
14
3
9
20
19
8
11
64513
64513
4
3
9
20
19
8
11
5
6
2
1
S3
70µsS1 LOAD
S2
MODE
EGN1
REEL
SENSE
M1
MAIN
MOTOR
M2
SUB
MOTOR
REV
L-ch
FWD
L-ch
8710
1
2
5
TAPE+B VCC
B.U
Lch L1
MUTE
B.U
stby
mtl
LOAD LOADSW
MTLSW
STBY
RIMUTE
1718
39
36
37
17
1918
7
5
IC 251
CXA2560Q
IC 351
PA2020A
GREEL SENSE PCB
FDECK UNIT
Q101
Q402
X501
Q155
Q501
Q154
Q151 Q153
85
1
7
11
ASNB
B–
B+
BL+
BL–
B.U
5
8
11 12
20 24
6
3
1
2
7
8IPPW
RX
TX
4
18
21
6
NL2
ldet
COMP
L-OUT
IC 501
PM4009A
Q3
CF202
X901
VDD
VCC
LOCL
VDD
VCC
ANTENNA
27
28
1
2
Q201 Q204
Q202
T51 Q51 CF51 CF52 CF53
ANT1 TV ANT2 TV
RF TV
AM RF
EEPROM
IC 3
BR9010FV
MIXER, IF AMP DET
IC 1
PML002A
FM/AM 1ST IF 10.7MHz
AM 2ND IF 450kHz
FM FRONT END
5
64
3
35
33
38 42 46
32
4439
45 55 57 61 74 75
71
65
78
54
70
69
63
25 24
19
46131211444134 33
22
IC 2 PM4008A
22 10 14 12 15 16 8 13 2 3
DI/DO CE2 CK CE1 SDBL SL FMSD NL1
CN101
CN452
CN451
Q401
25
EW, EE
B
21
B
AL
BU
TEL5V
Q102
Q451
EW, EE
IP-BUS
TEL
MIC