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DOLBY B NR

ORDER NO.

RRV2199

STEREO CASSETTE DECK

CT-L77
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Type
ZVYXK

Model CT-L77

Power Requirement
DC power supplied from other system component

Remarks

÷ This product does not operate normally by itself. Please connect it to the STEREO CD

RECEIVER XC-L77 , for adjustment and operation inspection. If operation confirmation for the unit by itself can not be avoided, please follow the instructions on page 21. ¶ This product is a system(s) component. Be sure to connect it to the prescribed system component(s), otherwise damage may result.
Component
STEREO CD RECEIVER S-L9-LRW SPEAKER SYSTEM STEREO CASSETTE DECK MINIDISC RECORDER -- --

Model
XC-L77 -- S-L9-A-LRW -- CT-L77 MJ-L77 -- -- S-L8-LRW

Service manual
RRV2187 RRV2176 RRV2176 RRV2178 RRV2199 RRV2201

Remarks

This manual.

CONTENTS
1. SAFETY INFORMATION ...................................... 2 2. EXPLODED VIEWS AND PARTS LIST ................ 3 3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM .. 10 4. PCB CONNECTION DIAGRAM .......................... 16 5. PCB PARTS LIST ............................................... 19 6. ADJUSTMENT .................................................... 21 PIONEER CORPORATION

7. GENERAL INFORMATION ................................ 7.1 DIAGNOSIS ................................................. 7.1.1 POWER ON SEQUENCE ...................... 7.2 PARTS ......................................................... 7.2.1 IC ............................................................ 8. PANEL FACILITIES AND SPECIFICATIONS ....

26 26 26 27 27 28

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 CORPORATION 1999
T­ZZR AUG. 1999 Printed in Japan

CT-L77

1. SAFETY INFORMATION
This service manual is intended for qualified service technicians ; it is not meant for the casual do-ityourselfer. 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

NOTICE (FOR CANADIAN MODEL ONLY) Fuse symbols (fast operating fuse) and/or be of identical designation.

(slow operating fuse) on PCB indicate that replacement parts must

REMARQUE (POUR MODČLE CANADIEN SEULEMENT) Les symboles de fusible (fusible de type rapide) et/ou de remplacement doivent avoir la męme désignation.

(fusible de type lent) sur CCI indiquent que les pičces

(FOR USA MODEL ONLY)

1. SAFETY PRECAUTIONS
The following check should be performed for the continued protection of the customer and service technician.

ANY MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER.

LEAKAGE CURRENT CHECK
Measure leakage current to a known earth ground (water pipe, conduit, etc.) by connecting a leakage current tester such as Simpson Model 229-2 or equivalent between the earth ground and all exposed metal parts of the appliance (input/output terminals, screwheads, metal overlays, control shaft, etc.). Plug the AC line cord of the appliance directly into a 120V AC 60Hz outlet and turn the AC power switch on. Any current measured must not exceed 0.5mA.

2. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in the appliance have special safety related characteristics. These are often not evident from visual inspection nor the protection afforded by them necessarily can be obtained by using replacement components rated for voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this Service Manual. Electrical components having such features are identified by marking with a on the schematics and on the parts list in this Service Manual. The use of a substitute replacement component which does not have the same safety characteristics as the PIONEER recommended replacement one, shown in the parts list in this Service Manual, may create shock, fire, or other hazards. Product Safety is continuously under review and new instructions are issued from time to time. For the latest information, always consult the current PIONEER Service Manual. A subscription to, or additional copies of, PIONEER Service Manual may be obtained at a nominal charge from PIONEER.

Device under test Test all exposed metal surfaces

Reading should Leakage not be above current 0.5mA tester

Also test with plug reversed (Using AC adapter plug as required)

Earth ground

AC Leakage Test

2

CT-L77

2. EXPLODED VIEWS AND PARTS LIST
NOTES:

· Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List. · 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. · Screws adjacent to mark on the product are used for disassembly.

2.1 PACKING
6 5 4 2(2/2) 2(1/2)

7 1(1/2)

CT-L77

FRONT
1(2/2)

3

÷ PACKING PARTS LIST
Mark No.
1 2 3 4 NSP 5

Description

Part No.

Mark No.
6 7

Description
Polyethylene Bag (0.03 × 230 × 340) Mirror Mat Sheet (750x600x0.5)

Part No.
Z21-038 Z23-007

Pad Front AHA7260 Pad Rear AHA7261 Packing Case AHD7767 Operating Instructions ARE7217 (Spanish/Portuguese/Dutch/Swedish/ English/French/German/Italian) Warranty Card ARY7022

3

CT-L77

17

2.2 EXTERIOR
30-2 18 28 27 26 11

2 16 30-1 29

10 3 27 20 11 9

A

16

22
4 24

25
24

C
23 19 22 23 31
7

B

24

B
22 22
24

A
C
Refer to "2.3 and 2.4 DECK MECHANISM UNIT"

13 22 12 5 14 21

1

8

6 6 15

4

CT-L77

÷ EXTERIOR PARTS LIST
Mark No.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 NSP NSP NSP NSP 26 27 28 29 30 30-1 30-2 31

Description
MAIN UNIT KEY L UNIT KEY R UNIT Connection Cable Deck Mechanism Unit Foot Rear Panel Bottom Plate Top Plate BLUE IND. UNIT Main Line Cord Holder Tray Panel Tray Line Bottom Base Front Line Bonnet Button A Assy Tray Seal Button B Assy Screw Screw Screw Screw CL Lens Button Lens Button Button Cap A Button Cap B Top Panel Assy Top Panel 1 Top Panel 2 Parallel Wire

Part No.
AWU7391 AWU7392 AWU7393 ADE7043 AXA7075 AEB7090 ANC7827 ANF7016 ANF7017 AWU7394 AAP7058 RNH-184 AAN7195 AAP7059 AMA7014 AAP7066 AMA7015 AWL7044 RRW1162 AWL7045 BBT30P060FZK BBZ30P060FMC PPZ30P100FMC VPZ30P080FZK AAX7704 AAX7703 AAD7528 AAP7063 AAP7064 AWL7051 AMB7645 AMB7646 D20PYY0625E

NSP NSP

NSP

NSP NSP

5

CT-L77

2.3 DECK MECHANISM UNIT (1/2)
6 5 17

16 4 16

14 3

16 18

8 1 13 16

11

12 9 4 16 7 10

2 2

Refer to "2.4. DECK MECHANISM UNIT (2/2).

6

CT-L77

÷ DECK MECHANISM UNIT (1/2) PARTS LIST
Mark No.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Description
Screw 2.6x5 Screw 2.6x6 Front BKT Washer 2.0 SP Return Plate Hold BLK Holder CST BLK LDG Base Pulley LDG Gear Slider LDG Belt Switch MTR Reel BLK ····· Screw 2.0x4 SP Clamper Switch

Part No.
FG114-14 UG12H-15 FC64K-11 MJ112-22 FK34N-11 F573-258 F527-078 FD56R-12 FD56T-11 FD56U-11 FD57E-11 FF19L-12 UE15S-14 F564-313 UG12H-28 FK34M-11 UE18P-21

7

CT-L77

2.4 DECK MECHANISM UNIT (2/2)

39 33 15 8 30 23 5 14 24 34 21 20

41 12 43 35 10 4 2 36 31 11 37 27 42

19

32

31 32 16 3 18 30 9 13 9 26 6 22 7 2

40

17

25

28 1 29

1 3

38

8

CT-L77

÷ DECK MECHANISM UNIT (2/2) PARTS LIST
Mark No.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

Description
Screw 2.0x6 Reel Feather Screw 2.6x3.5 SP Reel(L) SP Brake SP Arm Play SP Reel(R) Spring Cassette BKT MTR Reel Base Cam Gear Play Gear (A) Arm Play Plate Slide PCB Control BLK Chassis base BLK Head Base Roller Pinch BLK R Roller Pinch BLK L Assy F/W Clutch Assy BLK Clutch Assy BLK Washer 1.7x0.5 F/R Pulley Solenoid BLK F/R Belt Belt Main Plate HD BLK MTR MAIN BLK Washer 2.6x0.25 Washer 4.1x0.25 Washer 1.75x0.4 Lever Brake FF Gear(A) Cam SP Screw 2.0x0.3 Lever F/R Plunger Mecha-Cable Spring HB Screw 2.0x13 Washer 2.0 Spacer

Part No.
KG194-36 FD57D-13 UG11S-14 FK32U-12 FK33B-13 FK33P-11 FK32V-12 FC65M-11 FC64M-12 FD52W-12 FD52Y-23 FD53K-12 FD53D-19 FC61L-19 F567-617 F612-231 FC61K-32 F514-129 F514-130 FR24S-21 F522-037 F522-048 FJ111-13 FD53F-15 F765-279 FF18W-12 FF19H-11 F513-824 F525-321 FJ111-30 FJ111-35 UJ16F-11 FD53P-17 FD53L-12 FK32S-14 UJ14A-12 FC62G-14 FL41S-21 WH65N-11 FK32T-31 UG15V-13 MJ112-22 UJ15V-13

9

1

2

3

4

CT-L77

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM and OVERALL SCHEMATIC DIAGRAM
A
CN2301
Lch 3 -72dBv Q2301 2SK373 S D G 4 GNDA 2 VA+6 Q2307 DTA124EK GNDA EQ Q2303 DTC114TK VA+6 5 6 IC2301(1/2) 8 NJM4558MD 7 -32.2dBv

REC/PB HEAD

VR2301 VCP1154 4.7K-B Q2305 GNDA DTC114TK PB LEVEL ADJ. VR2302 PCP1154 4.7K-B GNDA

Rch 1

Q2302 2SK373 S D G

PB AMP
VA-6 3 2 Q2304 DTC114TK GNDA

IC2301(2/2) NJM4558MD 1 4 VA-6 EQ

Q2306 DTC114TK

PB/REC VR2801 VCP1164 220K-B IC2441(1/2) NJM4558MD 1 -3.7dBv Q2447 2SD2144S VR2401 VCP1158 22K-B GNDA GNDA GNDA 5 6 Q2444 DTC114TK Q2448 2SD2144S GNDA Q2443 DTC114TK GNDA REC LEVEL ADJ. VR2442 VCP1158 22K-B

3 2

B

DECK MECHANISM UNIT AXA7075

BIAS OFFSET
VR2802 VCP1164 220K-B

REC EQ AMP
VA+6 IC2441(2/2) NJM4558MD 8 7 4

Q2251 DTA124EK

VA+6

GNDA VA+6 Q2254 DTA124EK

6

BIAS OSC
2 1 Q2802 2SC1815

VT+6 Q2805 2SA1048

VA-6

CN2302
1 2 5 4

L2801 ATX7002

GNDA GNDA

RECMUTE

PB/XREC

3

ERACE HEAD

GNDT

Q2803 2SC1815 VT-6

Q2804 2SC1815

BIAS

C
13 12 11 10 9 8 7 6 5 4 3 2 1

CN2602
13 12 11 6 10 9 8 HALL 7 6 5 4 3 2 1

VR2701 VCP1151 1K-B

TAPE SPEED ADJ.
VM+6 X2501 VSS1045 6MHz XMOTOR VM+6 Q2712 2SB1425 Q2713 DTC124EK SOL Q2711 2SB1296 V+5 GNDD Q2714 DTA114EK GNDD CrO2(SW) XHALF XREC-F XMODE XREC-R TOUT 20 21 23 17 19 47 25 Q2502 DTC114TK NC Q2503 V+5 DTC143EK VL+6 SENS 10 11 3 IC2701 PDC059A 33 43 44 45 46

NC PB/XREC RECMUTE XCrO2 BIAS DOL ON/OFF S. CLOK(S) S. REQ S. DATA XRESET MS D. CLOK(M) PB MUTE D. DATA(M) D. REQ (M) V+5

MECHA CONT
2 16

µ-COM

XMODE

GNDD

VM-6 CrO2 XHALF XREC-F XMODE XREC-R

39 4 26 28 XRESET 5 15 36 37 34 22

VU+5 Q2705 DTA143EK VM+6 Q2701 TOUT Q2706 DTA143EK Q2702 TIN

CN2603

LOADING
Q2701-2704 :2SD1858X

1

32 14 35

LEDPLAY SERVICE KEY NC DKI­0

D

1 2 3 4 5

5 1 4 2 3 2 4 1 5

CN2503
VL-6 VL+6 LEDPLAY V+5 DKI­0 1 2 3 4 5 6

GNDM XOPEN XCLOSE

Q2703

Q2704

GNDM XOPEN XCLOSE 40 41

13

GNDD VL-6

10
1 2 3 4

XCrO2

Q2806 DTC124EK GNDA BIAS

VA-6

5

6

7

8

CT-L77
Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS and PARTS LIST" or "PCB PARTS LIST".
:PLAYBACK SIGNAL ROUTE IC2201 HA12136AF

TP -3.7dBv 11 +

A ( A 1/2, A 2/2)
Q2371 2SD2144S

MAIN UNIT (AWU7391)
-4.8dBv

:RECRDING SIGNAL ROUTE

A

DOLBY-B NR
14 -3.7dBv

CN2601
PB OUT Lch 19

TP 3 6 +

17 16

Q2372 2SD2114K GNDAP 3 2 IC2101(2/2) NJM4558MD 1

Q2475 DTA124EK

PB MUTE

GNDA

REC R 15 GND AR 14 REC L 13 NC 12

5 4 GNDA 6 IC2101(1/2) NJM4558MD

VA+6 8 7 4

VA-6 GNDD MS

VA+6 VA-6

MS
F2201 RTF1209 6 MPX 3

ALC
Q2102 2PD601A 9 -32.2dBv 16 Q2103 2SC1740S

TC+ GND P

11 10

TO CD RECEIVER XC­L77 or MD RECORDER MJ­L77

GNDAP

PB MUTE

18 GNDAP PB OUT Rch

B

F2202 RTF1209 8 1 GNDA Q2104 2SC1740S 6 MPX 3

GNDP

TC­ 9

GNDDTC

8 7 6 5 4 3 2 1

MPX
5 12 GNDA Q2202 DTA124EK GNDA Q2107 DTA124EK GNDA Q2108 DTC124EK VA+6 XRESET Q2541 DTC124EK GNDA Q2201 DTA124EK DOL ON/OFF V+5

NC S. DATA S. CLOCK S. REQ D. REQ D. DATA D. CLOCK

+

BIAS
GNDD

RESET

VL+6 VT+6 VA+6 VM+6

V+5

Q2001 2SB1566

Q2003 D2001 2PB709A UDZS5.6B

C
OUT IN

Q2005 2PD601A

IC2005 BAI7805T

GNDM GNDS GNDT GNDD OUT IC2002 NJM7906FA IN

VL­6 VT­6 VA­6 VM­6 CHASSIS GND

CN2901
1 2 3 4 5 6 VL-6 VL+6 LEDPLAY V+5 DKI­0 GNDD

KEY L UNIT : AWU7392
D2901 SLR-343MC VL-6 4 VL+6 3 KEY 2 1 GNDD

J2902
VL-6 VL+6 KEY GNDD

KEY R UNIT : AWU7393
VL-6 VL+6 S2902 ASG7013 1 2

J2903
1 2 VL-6 VL+6

BLUE IND UNIT : AWU7394
D2903 UDZ8.2B

D

4 3 2 1

S2901 ASG7013

EJECT

D2902 EB3804X

11
5 6 7 8

1

2

3

4

CT-L77 3.2 MAIN UNIT(1/2)
A

DECK MECHANISM UNIT (1/2) (AXA7075)

A 1/2

MAIN UNIT (AWU7391)

B

C

D

12

A 1/2
1 2 3 4

5

6

7

8

CT-L77

A

A 2/2
SIGNAL ROUTE : PLAYBACK SIGNAL : RECORDING SIGNAL 5 6 7

B

C

D

A 1/2
8

13

1

2

3

4

CT-L77 3.3 MAIN UNIT(2/2), KEYL UNIT, KEYR UNIT and BLUE IND UNIT
A

D

C

B

KEY L UNIT (AWU7392)

BLUE IND. UNIT (AWU7394)

KEYR UNIT (AWU7393)

B

C

DECK MECHANISM UNIT (2/2) (AXA7075)

: CHECK POINT for Service D SIGNAL ROUTE : PLAYBACK SIGNAL : RECORDING SIGNAL

14

A 2/2 B C D
1

2

3

4

5

6

7

8

CT-L77

A

A

2/2

MAIN UNIT (AWU7391)

B

6.3V 14V

A
C
­14V ­6.3V

1/2
D

5V

To CD RECEIVER XC-L77 or MD RECORDER MJ-L77 : The power supply is shown with the marked box.

5

6

7

A 2/2
8

15

1

2

3

4

CT-L77

4. PCB CONNECTION DIAGRAM
4.1 MAIN UNIT, KEYR UNIT, KEYL UNIT and BLUE IND UNIT
A

NOTE FOR PCB DIAGRAMS:
1. Part numbers in PCB diagrams match those in the schematic diagrams. 2. A comparison between the main parts of PCB and schematic diagrams is shown below.
Symbol in PCB Diagrams Symbol in Schematic Diagrams Part Name

SIDE A

B

KEYL UNIT

B B C E B B C E D D G S

C

E B

C

E Transistor

A
CN2503

C

E B

C

E Transistor with resistor

B

G

S D

G

S Field effect transistor

Resistor array

C

KEYR UNIT

3-terminal regulator 3. 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.

4. Viewpoint of PCB diagrams
Connector Capacitor

SIDE A
C
P. C. Board Chip Part

SIDE B

D

BLUE IND UNIT

ANP7328­A

D

16

B C D
1

2

3

4

1

2

3

4

CT-L77

SIDE A

A
Q2703 Q2701 Q2704 Q2702

MAIN UNIT

To MECHANISM UNIT (LOADING MOTOR)

A

B
CN2901

IC2701

Q2103 Q2104

IC2101

To CD RECEIVER XC-L77 or MD RECORDER MJ-L77 To MECHANISM UNIT REC/PB HEAD To MECHANISM UNIT ERACE HEAD To MECHANISM UNIT

Q2371 Q2372

B

IC2201

VR2301 VR2302

VR2441 VR2442 IC2301 Q2711 Q2447 Q2712 Q2448

C

Q2301 Q2302

VR2701

IC2441 VR2802 VR2801 IC2001

IC2002

Q2805 Q2804 Q2802 Q2803

D

IC2005

ANP7328­A

1

2

3

A
4

17

1

2

3

4

CT-L77

SIDE B
A

A

MAIN UNIT

Q2705 Q2706 IC2701 Q2503 Q2104 Q2253 Q2254 IC2101 Q2475 Q2251 Q2501

B

Q2371 Q2372 Q2502

IC2201 Q2741 Q2202

Q2201 Q2101 Q9451 Q2108 Q2107 Q2714 Q2306 IC2301 Q2305 Q2307 Q2305 Q2807 Q2447 Q2303 Q2304 Q2443 Q2301 Q2302 IC2441

C

Q2806 Q2005 Q2807

Q2804 Q2003 IC2005 Q2803

D

ANP7328­A

Q2802

18

A
1

2

3

4

CT-L77
Mark No. Description Part No. Mark No. Description Part No.

5. PCB PARTS LIST
NOTES:

· Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List. · 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. · When ordering resistors, first convert resistance values into code form as shown in the following examples.

Ex.1 When there are 2 effective digits (any digit apart from 0), such as 560 ohm and 47k ohm (tolerance is shown by J=5%, and K=10%). 561 ........................................................ RD1/4PU 5 6 1 J 560 56 × 101 473 ........................................................ RD1/4PU 4 7 3 J 47k 47 × 103 0.5 R50 ..................................................................................... RN2H R 5 0 K 1 1R0 ..................................................................................... RS1P 1 R 0 K Ex.2 When there are 3 effective digits (such as in high precision metal film resistors). 5621 ...................................................... RN1/4PC 5 6 2 1 F 5.62k 562 × 101

Mark No.

Description

Part No.

Mark No.

Description

Part No.

LIST OF PCB ASSEMBLIES
NSP TC COMP ASSY MAIN UNIT KEY L UNIT KEY R UNIT BLUE IND. UNIT AWM7450 AWU7391 AWU7392 AWU7393 AWU7394

COILS AND FILTERS
L2801 (OSC. COIL) L2501 L2802 L2441, L2442 (10 mH) L2443, L2444 (4.7 mH) F2201, F2202 (MPX. FILTER) X2501 CERAMIC RESONATOR ( 6.00 MHz ) ATX7002 LAU100J LFA121J RTF1004 RTF1021 RTF1209 VSS1045

A MAIN UNIT
SEMICONDUCTORS
IC2005 IC2201 IC2101, IC2301, IC2441 IC2002 IC2701 Q2003 Q2005, Q2102 Q2805 Q2711 Q2712 Q2001 Q2103, Q2104 Q2802­ Q2804 Q2701­ Q2704 Q2371, Q2372, Q2447, Q2448 Q2301, Q2302 Q2714 Q2107, Q2201, Q2202, Q2251, Q2254 Q2307, Q2475, Q2807 Q2705, Q2706 Q2303­ Q2306, Q2443, Q2444, Q2502 Q2108, Q2501, Q2806 Q2503, Q2541, Q2713 D2100­ D2102, D2105, D2107, D2108 D2301­ D2306, D2541, D2711, D2712 D2003 D2602, D2605, D2606 D2001 D2601, D2603, D2604 BA17805T HA12136AF NJM4558MD NJM7906FA PDC059A 2PB709A 2PD601A 2SA1048 2SB1296 2SB1425 2SB1566 2SC1740S 2SC1815 2SD1858X 2SD2144S 2SK373 DTA114EK DTA124EK DTA124EK DTA143EK DTC114TK DTC124EK DTC143EK 1SS133 1SS133 1SS355 MTZJ8.2B UDZS5.6B UDZS8.2B

CAPACITORS
C2801, C2802 C2441, C2442 C2301, C2302 C2303, C2304, C2321, C2322 C2507, C2508 C2104 C2305, C2306 C2013, C2205, C2206, C2209, C2210 C2319, C2320, C2339, C2340 C2463, C2464 C2203, C2204 C2001, C2008, C2099, C2459, C2460 C2103, C2812 C2102, C2445, C2446, C2541 C2307, C2308, C2451, C2452, C2806 C2003, C2005, C2006, C2313, C2314 C2461, C2462, C2502, C2701 C2721 C2207, C2208 C2465 C2506 C2505, C2510 C2457, C2458 C2443, C2444 C2810, C2811 C2455, C2456 C2809 C2501, C2503, C2504, C2511, C2702 C2490, C2711, C2712 C2111 CCCSL101K2H CCCSL221K2H CCSQCH100D50 CCSQCH101J50 CCSQCH221J50 CCSQCH271J50 CCSQSL681J50 CEAT100M50 CEAT100M50 CEAT100M50 CEAT101M10 CEAT1R0M50 CEAT220M50 CEAT2R2M50 CEAT330M25 CEAT470M16 CEAT470M16 CEAT471M10 CEATR22M50 CEATR47M50 CKCYB102K50 CKSQYB102K50 CKSQYB122K50 CKSQYB152K50 CKSQYB332K50 CKSQYB393K50 CKSQYB472K50 CKSQYF103Z50 CKSQYF104Z25 CKSQYF105Z16

19

CT-L77
Mark No. Description Part No.
CQHA822J2A CQMBA103J50 CQMBA223J50 CQMBA682J50 CQMBA683J50

Mark No.

Description

Part No.

C2803 C2213, C2214 C2453, C2454, C2808 C2309, C2310 C2447, C2448

C KEY R UNIT
SWITCHES AND RELAYS
S2902 ASG7013

RESISTORS
R2107, R2119 R2101 R2807 R2803, R2804 R2811 R2806 R2001, R2511, R2814 R2377 R2703­ R2706 R2813 R2005 R2325, R2540, R2541 R2805 R2512 R2201, R2202, R2323, R2324 R2453, R2454 VR2701 ( 1 k) VR2301, VR2302 (4.7 k) VR2441, VR2442 (22 k) VR2801, VR2802 (220 k) Other Resistors RD1/4PU102J RD1/4PU103J RD1/4PU121J RD1/4PU153J RD1/4PU180J RD1/4PU181J RD1/4PU221J RD1/4PU222J RD1/4PU391J RD1/4PU392J RD1/4PU471J RD1/4PU473J RD1/4PU4R7J RD1/4PU681J RD1/4PU820J RD1/4PU820J VCP1151 VCP1154 VCP1158 VCP1164 RS1/10S&&&J

RESISTORS
R2903 RS1/10S822J

OTHERS
J2902 4P CABLE HOLDER 4P 2mm JUMPER WIRE 51048-0400 D20PYY0425E

D BLUE IND UNIT
SEMICONDUCTORS
D2902 D2903 LED(BLUE) EB3804X UDZS8.2B

OTHERS
J2903 2P 2mm JUMPER WIRE D20PYY0210E

OTHERS
CN2503 CN2601 CN2602 CN2302 CN2301 CN2603 KN2001 6P CONNECTOR 19P CONNECTOR KR CONNECTOR(13P) KR CONNECTOR(2P) KR CONNECTOR 5P CONNECTOR PCB BINDER EARTH METAL FITTING 52147-0610 AKP7002 B13B-PH-K-S B2B-PH-K-S B4B-PH-K-S B5B-PH-K-S VEF1040 VNF1084

B KEY L UNIT
SEMICONDUCTORS
D2901 SLR-343MC

SWITCHES AND RELAYS
S2901 ASG7013

RESISTORS
R2905 Other Resistors RD1/4PU391J RS1/10S&&&J

OTHERS
4P CABLE HOLDER CN2901 6P 2mm CONNECTOR 51048-0400 52151-0610

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CT-L77

6. ADJUSTMENT
For adjustment, use the CD RECEIVER (XC-L77) in combination with the DISPLAY UNIT (XC-L77 accessory: DU-L77).

6.1 TEST MODE
How to Enter the Test Mode
In case of system operation ........
Receive "A15F" (bus data 1C5F) with the remote control or switch on the power with the TEST MODE JP [W127 (GNDD) and W128 (TEST)] of the MAIN UNIT short-circuited (pin 31 of the microcomputer connected to GND). (Refer to Fig. 6-1.)

In case of single operation ........
Connect part A of the MAIN UNIT [W135 (GNDA), W191 (GNDP) and chassis (KN2001)], short-circuit the TEST MODE JP [W127 GNDD) and W128 (TEST)] (pin 31 of the microcomputer connected to GND), and supply DC power to part [TC+ (10 V), TC- (-10 V) and GND (GNDP)]. (Refer to Fig. 6-1.) * Singie operation the keys "EJECT" and "PLAY" operate normally, and other connect part B of the MAIN UNIT W172 (GNDD), short-circuit the TEST JUMPER [W170(REC), W171(REW), W173(FF) and W175(STOP)].

REC
W170

REW GNDD
W172 W171

FF
W173

B
­10V GND +10V

STOP
W175

A
Note: When the P. C. board is tilted up for this, connect the earth of the mechanism also to KN2001.

AWU7391 W190 ...... ­10V W191 ...... GND W192 ...... +10V

TEST MODE W128 W127
Short point

MAIN UNIT

FRONT

Fig. 6­1 When test mode is entered, "TEST3" is displayed on the DISPLAY UNIT and the "PLAY" and "REC" LEDs flash.

21

CT-L77

Operation of the Test Mode
1. When the "EJECT" key is pressed, cassette mechanism switch check mode is entered and the DISPLAY UNIT displays the following.

6.2 SINGLE OPERATION METHOD
Operation of preparation
Connect part A of the MAIN UNIT [W135 (GNDA), W191 (GNDP) and chassis (KN2001)], short-circuit the TEST MODE JP [W127 GNDD) and W128 (TEST)] (pin 31 of the microcomputer connected to GND), and supply DC power to part [TC+ (10 V), TC- (-10 V) and GND (GNDP)]. (Refer to Fig. 6-1.)

REV REC SW
ON: REV recording OFF: possible R Impossible ­

In case of single connect load
In case of adjustment as a single unit, connect a 27 k load resistor to pins 17(PBR) and 19(PBL) of CN2601(MAIN UNIT). (Refer to Fig. 6-4.)

FWD REC SW
ON: FWD recording possible F OFF: Impossible ­

In case of input signal
In case of adjustment as a single unit, enter the signal at 13P(RECL) and 15P(RECR) of CN2601. At this time, connect an output buffer amplifier to the oscillator, and then connect a series resistor(180 ) after the impedance has become sufficiently low. (For MPX filter impedance matching) (Refer to Fig. 6-4.)

HALF SW
ON: Tape present OFF: Absent H ­

TAPE TYPE
NORMAL CrO2 (TYPE I) (TYPE II) 1 2

2. When the "PLAY" key is pressed, the mode for opening of LINE MUTE is reached, automatic recording and playback mode is reached and the following operation is performed. 1 FUNCTION is set to AUX. 2 FWD recording is performed for 4 sec. 3 RVS recording is performed for 4 sec. 4 FWD recording is performed for 4 sec. (Function becomes TAPE), and the unit stops. LINE MUTE opens in REC condition. 3. "DOLBY" ON/OFF check mode is made with the remote control " STOP" key. 4. The remote control the keys "PLAY", "FF", "RWD", "STOP", and "REC" operate normally and LIN MUTE opens in REC/ REC PAUSE condition. 5. When abnormal operation is detected, the corresponding code will be displayed on the DISPLAY UNIT.

In case of Fuction
Connect part B of the MAIN UNIT[ "REC"(W170), "REW"(W171), "FF"(W173) and "STOP"(W175), shortcircuit the TEST JUMPER [W172 GNDD] .

REC
W170

REW GNDD
W172 W171

FF
W173

STOP
W175

Error Code

01 ........ The head does not move up. 02 ........ The head does not move down. 03 ........ The tray does not close. 04 ........ The tray does not open.

7 Cancellation of test mode
Press the "STANDBY/ON" key or disconnect the AC power supply.

22

CT-L77

6.3 ADJUSTMENT
Please execute this adjustment in test mode .

Adjustment Condition
(1) The ground at the time of adjustment shall be W135. (Refer to Fig. 6­4). (2) Clean the heads and demagnetize them using a head eraser. (3) Set the measurement level to 0 dBV = 1 Vrms. (4) Use the specified tape for adjustment. Use the labeled (A) side of the test tape. NCT­111 : For Tape Speed Adjustment : For Head Azimuth Adjustment NCT­132X : For Playback Level Adjustment : For Playback Frequency Adjustment STD­632 : Normal blank tape STD­622 : CrO2 blank tape (5) Provide yourself with the following measuring devides: · AC millivoltmeter · Low-frequency oscillator · Attenuator · Oscilloscope (6) Adjust both right and left channels unless otherwise specified. (7) Turn the DOLBY NR switch off unless otherwize specified. (8) Warm up the unit for several minutes before adjustment. In particular, be sure to warm up the unit in the REC/PLAY mode for 3 to 5 minutes before starting recording/playback frequency characteristics adjustment. (9) Always follow the indicated adjustment order. Otherwise, a complete adjustment may not be achieved. Note: In case of adjustment as a single unit, connect a 27 k load resistor to pins 17 and 19 of CN2601.
Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. "DOLBY" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.

List of Adjustment
¶ Playback Section
(1) (2) (3) (4) Tape Speed Adjustment Head Azimuth Adjustment Playback Level Adjustment Playback Frequency Characteristics Confirmation

¶ Recording Section
(1) Recording Bias Adjustment (2) Recording Level Adjustment

PLAY BACK
250 3dB 10k 3dB 12.5k

4dB

RECORDING
12.5k 250 3dB 10k 3dB 5dB

Fig. 6-2 Frequency Characteristics

Test Tape NCT-132X
0 dB 30s 315 Hz 0 dB: 315 Hz, 250 nwb/m 30 s 6.3 kHz 30 s 10 kHz 30 s 315 Hz 10s .......................................................................................................... 10s ­20 dB 12.5 6.3 500 250 125 14 kHz kHz 10 kHz 8 kHz kHz 4 kHz 2 kHz 1 kHz Hz Hz Hz 63 Hz 40 Hz 10s

Fig. 6-3 Test Tape NCT-132X

23

CT-L77
6.2.1 Playback Section
(1) Tape Speed Adjustment
No. 1 Mode PLAY Input Signal/Test Tape NCT-111 (3 kHz) Adjustment Points VR2701 (MAIN UNIT) (Refer to Fig. 6-4) Measurement Points TP R cH (W134) (MAIN UNIT) Adjustment Value Remarks FWD adjustment REV Confirmation ( 3000 Hz ± 40Hz )

3000 Hz ±10Hz

(2) Head Azimuth Adjustment
· This unit is equipped with auto tape selector. · Do not switch between forward and reverse operation with the screwdriver inserted.
No. Mode Input Signal/Test Tape NCT-132X (10 kHz, ­20dB) Adjustment Points Head azimuth adjustment Screw (Fig. 6-4) Measurement Points TP L cH(W136) TP R cH(W134) (MAIN UNIT) Adjustment Value Max. Playback signal level Remarks After adjustment, apply silicon bond to the head azimuth adjustment screw.

1

PLAY

(3) Playback Level Adjustment
· Since this adjustment determines playback DolbyNR level, Perform it carefully.
No. Mode Input Signal/Test Tape Adjustment Points L ch R ch Measurement Points TP L cH(W136) TP R cH(W134) (MAIN UNIT) Adjustment Value Remarks

1

PLAY

NCT-132X test tape (Playback: 315 Hz, 0 dB)

VR2301 VR2302

­3.7 dBV

(4) Playback Frequency Characteristics Confirmation
No. Mode Input Signal/Test Tape Adjustment Points Measurement Points TP L cH(W136) TP R cH(W134) (MAIN UNIT) Adjustment Value Remarks Check that the frequency characteristics is within the range of Fig. 6-2.

1

PLAY

NCT-132X test tape

6.2.2 Recording Section
(1) Recording Bias Adjustment
· After the adjustment, caution should be exercised so as not to become under bias by checking the distortion rate.
No. Mode REC/ PAUSE REC = PLAY Input Signal/Test Tape Input a 315Hz signal to the AUX terminal of XC-L77. Load the STD­632 test tape and record/playback the 315Hz and 10kHz signals. (see the Note below) Adjustment Points Measurement Points Adjustment Value Remarks

1

Input signal level L ch R ch

­23.7 dBV
TP L cH(W136) TP R cH(W134) (MAIN UNIT) Repeat adjustment until playback level of the 10kHz signal is within 0.5dB ± 0.5dB from that of the 315Hz signal.

VR2801 VR2802

2

Note: Set the 10kHz input signal level to the same value as the 315Hz input signal level of step 1.

(2) Recording Level Adjustment
No. 1 Mode REC/ PAUSE REC = PLAY Input Signal/Test Tape Input a 315Hz signal to the AUX terminal of XC-L77. · STD­632 test tape and record/ playback the 315Hz signal. · DOLBY NR : OFF Adjustment Points Input signal level L ch R ch Measurement Points Adjustment Value Remarks

­7.7 dBV
TP L cH(W136) TP R cH(W134) (MAIN UNIT) Repeat recording, playback and adjustment until playback level of the 315Hz signal becomes ­7.7dBV ± 0.5dB.

VR2441 VR2442

2

*:

In case of adjustment as a single unit, enter the signal at 13P and 15P of CN2601. At this time, connect an output buffer amplifier to the oscillator, and then connect a series resistor (180 ) after the impedance has become sufficiently low. (For MPX filter impedance matching)

24

CT-L77

Adjustment and Measurment Points
STOP FF REW REC

MAIN UNIT

W170

W171

W173

W175

W127 (GNDD)

Pin 17 (PB R) Pin13 Pin15 (REC L) (REC R)

W134 (TP R) W135 (GNDA) W136 (TP L)

VR2302 (R ch) VR2301 (L ch)

PB LEVEL

IC2201

FWD Azimuth Adjustment Screw

Fig. 6­4

Adjustment and Measurement Points 25

1

TEST MODE

19

(TEST) W128

Pin 19 (PB L)

CN2601

GNDD

Front

W172

TAPE SPEED VR2802 VR2801 (R ch) (L ch)

VR2701

BIAS LEVEL

VR2442 (R ch) VR2441 (L ch)

REC LEVEL

REV Azimuth Adjustment Screw

CT-L77

7. GENERAL INFORMATION
7.1 DIAGNOSIS
7.1.1 POWER ON SEQUENCE
· STANDBY/ON key is pressed. · Receive the system power on information with the sytem bus. Note : Pin No. shows the Pin No. of µ-COM PDC059A.

Go to Power ON

No

Is Tray open ?

Check the mecha. switch (port Pin 40 and Pin 41 ) CLOSE Pin 40 = H , Pin 41 = L OPEN Pin 40 = L , Pin 41 = H

Yes Tray close Close it if the tray is opened (port Pin 1 and Pin 47 ) CLOSE Pin 1 = L , Pin 47 = H OPEN Pin 1 = H , Pin 47 = L

Perform the mechanism initialization every time it power on. (When the AC outlet is pulled out while raising up the Head Base or the gear comes off, perform the initialization every time because the normal movement can't be done.)

200mS WAIT Check that the mecha. is stop condition (port Pin 17 = L)

Is MODE SW OFF ? No

Yes

MOTOR ON SOL 50mS ON (port Pin 2 =H ) (port Pin 3 =L) No 150mS WAIT Is MODE SW OFF ? Yes Yes :ERROR

500mS WAIT

MOTOR ON

Is it fifth times ? No No

ERROR

Is MODE SW OFF ? Yes 300mS WAIT

Is it second times ? Yes :Give up

No

MOTOR OFF

(port Pin 3 )

Initialize end Deck motor off (port Pin 3 = L)

END

26

CT-L77

7.2 PARTS
7.2.1 IC
· The information shown in the list is basic information and may not correspond exactly to that shown in the schematic diagrams.

PDC059A (MAIN UNIT : IC2701)
· System Microcomputer

·Pin Function
No. Pin Name I/O
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 TIN SOL XMOTOR S.CLK XRESET E+5V NC E+5V GNDD CF1 CF2 E+5V KEY1 KEY2 MS SENSE XMODE NC XRECR XCrO2(SW) XHALF D.REQ XRECF NC O O O I I I - I - I O - I I I I I - I I I I I - Solenoid control Cassette mechanism motor control System bus clock Reset input Connect to VDD Not used Connect to VDD GND Connected to ceramic oscillator ( 6 MHz) Power supply +5V AD key data input MS audio signal input Sensing pulse input Cassette mechanism mode SW input Not used REV REC detection SW input CrO2 position detection SW input Tape detection SW input Display bus Request FWD REC detection SW Not used

Pin Function
Loader mechanism motor close

No. Pin Name I/O
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 POFF S.REQ S.DOUT S.DIN NC AM56 XTEST LEDPLAY LINEMUTE D.DATA LEDCE D.CLK PB MUTE MODEL DOLBY XOPEN XCLOSE NC PB/XREC RECMUTE XCrO2 BIAS TOUT NC I

Pin Function
Non connection

I/O System bus request O I - ­ I O ­ O O O O I O I I - O O O O O - System bus output data System bus input data Not used Non connection Test mode detection input PLAY LED (ON/OFF) Non connection Display bus Data control Non connection Display bus Clock control PB MUTE control Model switch input DOLBY NR control Loader mechanism open SW control Loader mechanism close SW input Not used DOLBY PB/REC control REC MUTE control Normal / CrO2 control BIAS control Loader mechanism motor open Not used

27

CT-L77

8. PANEL FACILITIES AND SPECIFICATIONS
PANEL FACILITIES
1
`
&
DOLBY B NR

2

3

4
)

1 2 3 4

Play buttons and direction indicators (2, 3) Power on indicator Cassette tray OPEN/CLOSE button (0) DOLBY* NR
* ¶ Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. ¶ "DOLBY" and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.

SPECIFICATIONS
System ...................................................... 4-track, 2-channel stereo Heads .................................................................... "Hard Permalloy" recording/playback head × 1 "Ferrite" erasing head × 1 Motor ................................................................ DC servo motor × 1 Wow and Flutter ..................................................... *0.08% (WRMS) Frequency Response ­20 dB recording: TYPE II (High/CrO2) tape .............. *20 Hz to 16,000 Hz ±6 dB TYPE I (Normal) tape ................... *20 Hz to 16,000 Hz ±6 dB Signal-to-Noise Ratio Dolby NR OFF ............................................................. *56 dB (peak recording level, audible compensation TYPE II) Noise Reduction Effect Dolby NR ON .......................... 10 dB compensation at 5 kHz Dimensions ...................................... 220 (W) × 75 (H) × 310 (D) mm Weight (without package) ....................................................... 2.2 kg * Values measured in accordance with EIAJ standards.

Accessories
Operating instructions ZVY type ......................................................................................... 1 NOTE: Specifications and design subject to possible modifications without notice, due to improvements.

28