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ORDER NO.
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 ELECTRONIC (EUROPE) N.V. Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936
PIONEER CORPORATION 1999
c
Component
Model
Service manual
Remarks
STEREO CD RECEIVER
XC-L77
RRV2187
S-L9-LRW
--
--
RRV2176
SPEAKER SYSTEM
--
S-L9-A-LRW
--
RRV2176
--
--
S-L8-LRW
RRV2178
STEREO CASSETTE DECK
CT-L77
RRV2199
This manual.
MINIDISC RECORDER
MJ-L77
RRV2201
Type
Model
Power Requirement
CT-L77
ZVYXK
DC power supplied from other system component
CT-L77
RRV2199
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
CONTENTS
7. GENERAL INFORMATION ................................ 26
7.1 DIAGNOSIS ................................................. 26
7.1.1 POWER ON SEQUENCE ...................... 26
7.2 PARTS ......................................................... 27
7.2.1 IC ............................................................ 27
8. PANEL FACILITIES AND SPECIFICATIONS .... 28
T­ZZR AUG. 1999 Printed in Japan
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
STEREO CASSETTE DECK
`
&
0
DOLBY B NR
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.


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2
CT-L77
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.
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
(slow operating fuse) on PCB indicate that replacement parts must
be of identical designation.
REMARQUE
(POUR MODÈLE CANADIEN SEULEMENT)
Les symboles de fusible
(fusible de type rapide) et/ou
(fusible de type lent) sur CCI indiquent que les pièces
de remplacement doivent avoir la même désignation.
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.
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.
1. SAFETY PRECAUTIONS
The following check should be performed for the
continued protection of the customer and service
technician.
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.
(FOR USA MODEL ONLY)
Leakage
current
tester
Reading should
not be above
0.5mA
Device
under
test
Test all
exposed metal
surfaces
Also test with
plug reversed
(Using AC adapter
plug as required)
Earth
ground
AC Leakage Test


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3
CT-L77
2.1 PACKING
1
Pad Front
AHA7260
2
Pad Rear
AHA7261
3
Packing Case
AHD7767
4
Operating Instructions
ARE7217
(Spanish/Portuguese/Dutch/Swedish/
English/French/German/Italian)
NSP
5
Warranty Card
ARY7022
÷ PACKING PARTS LIST
Mark No.
Description
Part No.
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.
Mark No.
Description
Part No.
6
Polyethylene Bag
Z21-038
(0.03
× 230 × 340)
7
Mirror Mat Sheet
Z23-007
(750x600x0.5)
1(1/2)
1(2/2)
2(1/2)
2(2/2)
3
7
CT-L77
4
5
6
FRONT


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4
CT-L77
2.2 EXTERIOR
A
A
B
B
C
C
30-1
5
14
15
13
22
22
22
21
3
6
1
8
2
16
25
11
17
11
18
28
26
27
27
10
16
22
31
22
20
12
24
24
4
24
7
24
6
19
23
23
29
9
30-2
Refer to "2.3 and 2.4
DECK MECHANISM
UNIT"


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5
CT-L77
÷ EXTERIOR PARTS LIST
Mark No.
Description
Part No.
1
MAIN UNIT
AWU7391
2
KEY L UNIT
AWU7392
3
KEY R UNIT
AWU7393
4
Connection Cable
ADE7043
5
Deck Mechanism Unit
AXA7075
6
Foot
AEB7090
7
Rear Panel
ANC7827
NSP
8
Bottom Plate
ANF7016
NSP
9
Top Plate
ANF7017
10
BLUE IND. UNIT
AWU7394
11
Main Line
AAP7058
12
Cord Holder
RNH-184
13
Tray Panel
AAN7195
14
Tray Line
AAP7059
15
Bottom Base
AMA7014
16
Front Line
AAP7066
17
Bonnet
AMA7015
18
Button A Assy
AWL7044
NSP
19
Tray Seal
RRW1162
20
Button B Assy
AWL7045
21
Screw
BBT30P060FZK
22
Screw
BBZ30P060FMC
23
Screw
PPZ30P100FMC
24
Screw
VPZ30P080FZK
25
CL Lens
AAX7704
NSP
26
Button Lens
AAX7703
NSP
27
Button
AAD7528
NSP
28
Button Cap A
AAP7063
NSP
29
Button Cap B
AAP7064
30
Top Panel Assy
AWL7051
NSP
30-1
Top Panel 1
AMB7645
NSP
30-2
Top Panel 2
AMB7646
31
Parallel Wire
D20PYY0625E