Pioneer tf 21 service manual

Page 1

Service
Manual

STEREO CASSETTE DECK

T-F21

THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODELIS) AND TYPEIS).

ORDER NO.
RRV1732

Model

Ty Power Requirement Remarks
pa T-FZ 1

MY 0 ACZZOV-ZSOV
NV 0 ACZSOV

CONTENTS
1. SAFETYINFORMATION ..................... .. 2 7. GENERAL INFORMATION ..
2. EXPLODED VIEWS AND PARTS LIST .. 3 7.1 PARTS ........................
3. SCHEMATIC DIAGRAM .......... 12 7.1.1 IC ...........
4. PCB CONNECTION DIAGRAM 20 7.1.2 DISPLAY
5. PCB PARTS LIST 29 7.2 BLOCK DIAGRAM ..
G. ADJUSTMENT ......................................................... 31 8. PANEL FACILITIES AND SPEC

PIONEER ELECTRONIC CORPORATION 4-1. Meguro1-Chome, Meguro-ku, Tokyo 153. Japan

PIONEER ELECTRONICS SERVICE, INC. P.O. Box 1760, Long Beach. CA 90801-1760, U. S. A.

PIONER ELECTRONIC IEUROPEI N.V. Haven 1087 Keetberglaan 1. 9120 Melsele. Belgium

PIONEER EECTIIONICS ASIACBI'I'RE PTE. LTD. 501 Olchaid Road. #1000 Lane Crawford Place, Singapore 0923

O PIONEER ELECTRONIC CORPORAflON 1997 T-SZK JAN 1997 pm in Japan

Page 2

T-F21

1. SAFETY INFORMATION

This service manual is intended for qualified service technicians; it is not meant for the casual
do-lt-yourselier. 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 perionn the repair of this product property and safely, you
should not risk trying to do so and refer the repair to a qualified service technician.

WARNING

Lead in solder used in this product is listed by the California Health and Welfare agency as a known reproductive toxicant which
may cause birth defects or other reproductive harm (California Health & Safety Code. Section 25249.5).

When servicing or handling circuit boards and other components which contain lead in solder. avoid unprotected skin contact with
the solder. Also. when soldering do not inhale any smoke or fumes produced.

NOTICE

(FOR CANADIAN MODEL ONLY)

Fuse symbols attest operating iuse) and/or
must be of identical designation.

REMARQUE

(POUR MODELE CANADIEN SEULEMENT)

Les symboles de fusible EUusible de type rapide) etlou
pieces de remplacement doivent avoir la meme designation.

- (FOR USA MODEL ONLY)

Blow operating iuse) on PCB indicate that replacement parts

attusible de type lent) sur CCl indiquent que les

i. 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. etct). Plug
the AC line cord oi the appliance directly into a 120V
AC 60 Hz outlet and turn the AC power switch on. Any
current measured must not exceed 0.5 mA.

Leakage
current
tester

Reading should
not be above
0.5 mA

Device
under
test

Test all mom:
metal surfaces

Am mt with plug
reversed

(Using Ac adapter
plus I: required)

©ii

Earth ground

AC Leakage Test

ANY MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A P0-
TENTIAL SHOCK HAZARD AND MUST BE COR-
RECTED BEFORE RETURNING THE APPLIANCE
TO THE CUSTOMER.

2. PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in the appli-
ance have special safety related characteristics. These
are often not evident from visual inspection nor the
protection afforded by them necessarily can be ob-
tained 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 A on the schematics and
on the parts list in this Service Manual.
The use of a substitute replacement component which
dose not have the same safety characteristics as the
PIONEER recommended replacement one. shown in
the pans 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. Asubscription to, or ad-
ditional copies of. PIONEER Service Manual may be
obtained at a nominal charge from PIONEER.