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Service KEH-P780/X1N/UC
Manual ORDER NO.
CRT2306
MULTI-CD CONTROL HIGH POWER CASSETTE PLAYER WITH FM/AM TUNER
KEH-P780
KEH-P7800 X1N/UC
X1N/UC
NOTE:
- See the separate manual CX-631(CRT1640) for the cassette mechanism description.
- The cassette mechanism assy employed in this model is one of 2L series.
- Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation.
"Dolby" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.
CONTENTS
1. SAFETY INFORMATION ...........................................2 7. GENERAL INFORMATION ......................................42
2. EXPLODED VIEWS AND PARTS LIST......................2 7.1 PARTS.................................................................42
3. SCHEMATIC DIAGRAM ..........................................10 7.1.1 IC ...............................................................42
4. PCB CONNECTION DIAGRAM ...............................20 7.1.2 DISPLAY ...................................................47
5. ELECTRICAL PARTS LIST .......................................30 7.2 DIAGNOSIS........................................................48
6. ADJUSTMENT ........................................................40 7.2.1 DISASSEMBLY .........................................48
7.2.2 TEST MODE .............................................49
7.3 BLOCK DIAGRAM..............................................52
8. OPERATIONS AND SPECIFICATIONS ...................53
PIONEER ELECTRONIC 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 ELECTRONIC [EUROPE] N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936
C PIONEER ELECTRONIC CORPORATION 1998 K-ZZS. NOV. 1998 Printed in Japan
KEH-P780,P7800
1. SAFETY INFORMATION
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.
WARNING
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
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
7 4
2
8
5
6
10 18
3
11
13
9
19
16
1
12 21
20
17
14
15
2
KEH-P780,P7800
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.
(1) PACKING SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
1 Cord Assy See Contrast table(2) 16 Protector CHP2101
* 2 Accessory Assy CEA2350 17 Protector CHP2102
3 Spring CBH1650 18 Remote Control Unit See Contrast table(2)
4 Screw Assy CEA2351 19 Case Assy CXB3520
5 Screw CBA1304 20-1 Owner's Manual See Contrast table(2)
(English, French)
* 6 Polyethylene Bag CEG-127
7 Screw CRZ50P090FMC 20-2 Installation Manual See Contrast table(2)
8 Screw TRZ50P080FMC (English, French)
* 9 Polyethylene Bag CEG-158 * 20-3 Warranty Card See Contrast table(2)
10 Handle CNC5395 21 Cord Assy See Contrast table(2)
11 Bush CNV3930
12 Polyethylene Bag CEG1173
13 Battery See Contrast table(2)
14 Carton See Contrast table(2)
15 Contain Box See Contrast table(2)
(2) CONTRAST TABLE
KEH-P780/X1N/UC and KEH-P7800/X1N/UC are constructed the same except for the following:
Part No.
Mark No. Symbol and Description KEH-P780/X1N/UC KEH-P7800/X1N/UC
1 Cord Assy CDE5758 Not used
13 Battery CEX1030 Not used
14 Carton CHG3551 CHG3550
15 Contain Box CHL3551 CHL3550
18 Remote Control Unit CXB3456 Not used
20-1 Owner's Manual CRD2760 CRD2758
20-2 Installation Manual CRD2761 CRD2759
* 20-3 Warranty Card CRY1070 Not used
21 Cord Assy Not used CDE5802
3
KEH-P780,P7800
2.2 EXTERIOR
4
KEH-P780,P7800
(1) EXTERIOR SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
1 Screw BMZ30P040FMC 41 Case CNC8254
2 Screw BSZ26P050FMC 42 Holder CNC8255
3 Screw BSZ30P050FMC 43 Case CNC8350
4 Cord Assy See Contrast table(2) 44 Case CNC8351
5 Fuse(10A) CEK1136 45 Insulator CNM6099
6 Case CNB2350 46 Insulator CNM6190
7 Holder CNC6798 47 Insulator CNM6257
8 Shield CNC7365 48 Heat Sink CNR1505
9 Spacer CNM5488 49 Insulator CNV5792
10 Panel CNS5148 50 FM/AM Tuner Unit CWE1467
11 Cap CNV2680 51 Holder CNC6554
12 Screw BSZ30P050FMC 52 Chassis Unit CXB3048
13 Screw BSZ30P200FMC 53 Screw ISS26P055FUC
14 Cord CDE5176 54 Detach Grille Assy See Contrast table(2)
15 Cord See Contrast table(2) 55 Screw BPZ20P060FMC
16 Holder CNC5704 56 Screw BPZ20P080FZK
17 Cushion CNM4870 57 Button(OPEN) CAC5804
18 Insulator CNM6275 58 Button(EJECT) CAC5805
19 Insulator CNV5793 59 Button(SOURCE) CAC5806
20 Tuner Amp Unit See Contrast table(2) 60 Button(BAND) CAC5807
21 Screw BMZ26P040FMC 61 Button(EQ) CAC5808
22 Screw BPZ26P060FMC 62 Button(DISP) CAC5809
23 Screw BSZ26P060FMC 63 Button(1-6) CAC5922
24 Screw BSZ26P160FMC 64 Spring CBH2205
25 Clamper See Contrast table(2) 65 Cover CNS5146
26 Pin Jack(CN301) CKB1028 66 Holder CNV5537
27 Terminal(CN403) CKF1059 67 Keyboard Unit CWM6061
28 Plug(CN951) CKM1231 68 LCD(LCD901) CAW1502
29 Plug(CN604) CKS-783 69 EL CEL1587
30 Connector(CN601) CKS1499 70 Connector(CN901) CKS2733
31 Connector(CN751) CKS3408 71 Holder CNC7992
32 Connector(CN602) CKS3568 72 Tape CNM6348
33 Connector(CN603) See Contrast table(2) 73 Spacer CNM6347
34 Connector(CN302) CKS3598 74 Connector CNV5536
35 Antenna Jack(CN402) CKX1056 75 Grille Unit See Contrast table(2)
36 Panel See Contrast table(2) 76 Screw BPZ20P060FMC
37 Heat Sink CNC7991 77 Screw CBA1082
38 Holder CNC7996 78 Screw CBA1176
39 Holder CNC7997 79 Washer CBF1001
40 Case CNC7998 80 Spring CBH2063
5
KEH-P780,P7800
Mark No. Description Part No. Mark No. Description Part No.
81 Spring CBH2204 96 Holder Unit CXB3051
82 Cord CDE5800 97 Damper Unit CXB3180
83 Connector CKS2780 98 Screw IMS20P040FZK
84 Roller CLA3386 99 Remote Control Unit See Contrast table(2)
85 Cushion CNM5486 100 Cover See Contrast table(2)
86 Sheet CNM6109 101 Cord Assy See Contrast table(2)
87 PCB CNP5430 102 Cassette Mechanism Module EXK3990
88 PCB CNP5444 103 Coil(L801) CTH1227
89 Panel CNS5147 104 IC(IC301) PAL005A
90 Holder CNS5157 105 Transistor(Q951) 2SD2396
91 Holder CNS5165
92 Holder CNS5389
93 Switch(S602) CSN1027
94 Holder Unit CXB3049
95 Holder Unit CXB3050
(2) CONTRAST TABLE
KEH-P780/X1N/UC and KEH-P7800/X1N/UC are constructed the same except for the following:
Part No.
Mark No. Description KEH-P780/X1N/UC KEH-P7800/X1N/UC
4 Cord Assy CDE5758 Not used
15 Cord CDE5762 Not used
20 Tuner Amp Unit CWM6143 CWM6145
25 Clamper CEF1005 Not used
33 Connector(CN603) CKS3597 Not used
36 Panel CNB2357 CNB2358
54 Detach Grille Assy CXB3437 CXB3438
75 Grille Unit CXB3481 CXB3482
99 Remote Control Unit CXB3456 Not used
100 Cover CNS4948 Not used
101 Cord Assy Not used CDE5802
6
KEH-P780,P7800
7
KEH-P780,P7800
2.3 CASSETTE MECHANISM MODULE
8
KEH-P780,P7800
- CASSETTE MECHANISM MODULE SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
1 Screw BSZ20P040FMC 31 Gear ENV1347
2 Washer CBF1037 32 Collar ENV1508
3 Washer CBF1038 33 Gear ENV1350
4 Washer CBG1003 34 Flywheel ENV1500
5 Deck Unit EWM1018 35 Worm Gear ENV1439
6 Screw EBA1028 36 Worm Wheel ENV1440
7 Screw EBA1037 37 Gear ENR1037
8 Spring EBH1531 38 Lever ENV1442
9 Spring EBH1575 39 Arm ENV1525
10 Plug(CN251) CKS3540 40 Gathering PCB ENX1037
11 Spring EBH1515 41 Gathering PCB ENX1042
12 Spring EBH1587 42 Switch(S1,S2) ESG1004
13 Spring EBH1517 43 Motor Unit(M2) EXA1485
14 Spring EBH1518 44 Chassis Unit EXA1567
15 Spring EBH1519 45 Pinch Holder ENV1485
16 Spring EBH1537 46 Pinch Holder ENV1486
17 Cord EDD1020 47 Reel Unit EXA1543
18 Photo-interrupter(EGN2,3) EGN1006 48 Head Base Unit EXA1457
19 Photo-interrupter(EGN1) EGN1005 49 Lever Unit EXA1438
20 Roller ENR1031 50 Gear Unit EXA1545
21 Shaft ELA1373 51 Frame Unit EXA1458
22 Pinch Roller ENV1518 52 Lever Unit EXA1439
23 Arm ENC1489 53 Head Assy(HD1) EXA1506
24 Arm ENC1397 54 Motor Unit(M1) EXA1490
25 Guide ENC1481 55 Washer HBF-179
26 Holder ENC1417 56 Screw BMZ20P022FMC
27 Lever ENC1448 57 Spring EBH1545
28 Arm ENC1488 58 Washer YE20FUC
* 29 Motor EXM1031 59 Pinch Holder Unit EXA1529
30 Belt ENT1027 60 Pinch Holder Unit EXA1528
9
1 2 3 4
KEH-P780,P7800
3. SCHEMATIC DIAGRAM
3.1 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
B
ANTENNA JACK
Large size
A-a A-b
SCH diagram
A-a A-b Guide page
B
A-a A-b Detailed page
MODULE
D E F
C
D
C
10 A C
1 2 3 4
5 6 7 8
KEH-P780,P7800
A
A-b
A
B
C
D
5 6 7
A8
11
1 2 3 4
KEH-P780,P7800
A-a A-b
A
B
ANTENNA JACK
C
B
D
12 A-a
1 2 3 4
5 6 7 8
KEH-P780,P7800
A-a A-b
A
B
C
MODULE D E F
D
C
5 6 7
A-a C 8
13
1 2 3 4
KEH-P780,P7800
A-a A-b
A
B
A
C
D
14 A-b
1 2 3 4
5 6 7 8
KEH-P780,P7800
A-a A-b
A
B
C
D
5 6 7
A-b8
15
1 2 3 4
KEH-P780,P7800
3.2 FM/AM TUNER UNIT
A
B FM/AM TUNER UN
B
D6 MA157
D2 RD39JS D1 RD39JS
2R2M
R1
2R2M
R2
C
1
2
3
D
16 B
1 2 3 4
5 6 7 8
KEH-P780,P7800
A A
ER UNIT
IFC
B
C
D
5 6 7
B8
17
1 2 3 4
KEH-P780,P7800
3.3 CASSETTE MECHANISM MODULE
A
D DECK UNIT
VR302
CCP1280
33K(B)
C302
R1
C310 R1
C256
R301
R258
18K
C253 330P R01 1K
29
28
27
30
26
25
23
24
22
21
RL Rev R283 0R0
C302
R1
C254 330P R256 220 31 20 R273 1K
RR Rev R284 0R0
32 19 R272 1K
33 18 R271 1K R290 0R
R282 0R0 34 17 R274 1K
FR Fwd C252 330P C273 R287 35 CXA2560Q 16
22/16 0R0 36 15 C403 R0
FL Fwd R281 0R0 37 14
B C251 330P 38 13 R403 82
C402
HD1 39 12 R40
HEAD ASSY
EXA1506
R255 220 40 11 4700P
C401 R40
R33 4R7
TEST TAPE
NCT-150
10
(400Hz, 200nWb/m)
2
3
4
1
5
6
8
7
9
C255 R257
R01 1K
0R0
1K
100P
C301
R1
R1
R323
R322
C309
C313
VR301
33K(B) CCP1280
C272 R1
0R0
Signal GND
0R0
R285
R386
C MUTE
-6dBs(388mV)