Technics SX-PX201

PRECAUTIONS BEFORE SERVICING
IE Precautions for measuring of the output waveforms.
4. The waveform was measured with a “National Digital Storage Oscilloscope VP-5730A”. Therefore the waveforms of musical
tone signals shown may differ somewhat due to the difference in the timing of triggering.
2. Since the 1/10 test probe is used, the indicated voltage value on the bottom part of each waveform photois 1/10 oftheactuah é, jie nash sant te sitozchneoi® Sy aceWiaehsgeare
value (e.g. 0.2 V/cm should be 2.0 V/cm). : i
3. To measure the waveforms, first set this unit'to the self-diagnostic mode (refer to page I-12, No. 4). The Wave ROM output will * os » i
then be output as a sine wave to facilitate the servicing check. ‘ REGS rien FREE SS SS 5: Cyr Se eS egeRee
IE important safety notice: SE eee Soieteeganascter cust sista te 7
Components identified by a A\, mark have special characteristics impotant for safety.
When replacing any of these components, use only manufacture’s specified parts:
@ Symbolic Marks
The symbolic marks for resistors and capacitors which used in this circuits are classified as foliowing TABLE-1 and TABLE-2. * = Pall ae eee ETE, AES soba tveaeeee eck
1, RESISTORS
* Resistors without symbolic mark are FIXED CARBON FILM RESISTORS (ERD-type).
+ All resistors are 1/4 WATT, +5 % TOLERANCE unless otherwise designated in schematic diagrams.
(TABLE-1) it vee tet ieee e Berea tieeeeedee
SYMBOL,
SPECIFICATION
SYMBOL
SPECIFICATION
!
©
Fixed
Carbon
Film
Resistors
®
Fixed
Metal
Film
Resistors
eagrgee
yd
Se
Aen
Pee
wines
SHAPER
YE of
Sopoes
bas
Soaeets
Tiki
e
see
Me
ree
eee Set
ey
“FLAME-PROOF”
(ERD—F—type)
~~”
|“FLAME-PROOF”
(ERX—type)
® Fixed Wire Wound Resistors F Fuse Type Fixed Meta! Oxide Film Resistors
“FLAME-PROOF" (ERF—type) “FLAME-PROOP” (ERQ-—type)
® Fixed Metal Oxide. Film Resistors. Reo Fuse Type Fixed Carbon File Resistors ft ttt esse sees ses escsesssessess
“FLAME-PROOF” (ERG—type) { aA “FLAME-PROOP” (ERD2FC—type)
Fixed Metal Film Plesistors (Prédidiggi and High Stabilly) (ERO—type)> fi
2, CAPACITORS wn
* Capacitors without symbolic mark are POLYESTER CAPACITORS. (ECOM-type, ECQG-type, £10 % Tolerance) pene ot
* Polarized capacitors without symbolic mark are Aluminum Electrolytic Capapcitors. (ECEA-type, +20 % Tolerance) . arene
{TABLE-2)
SYMBOL SPECIFICATION i TYPE
®) Non-Polarized Electrolytic Capacitors ECEA_KN_type
®) Non-Polarized Electrolytic (for Network system)- ‘ ; ECEA_Y_type gids Airis aha ube cade ae ake
@ Tantalum Solid Electrolytic Capacitors ees ECS_type :
CE) Metalized Plastic Film Capacitors (TF Series) § ECQV_type
Temperature Compensating Ceramic Capacitors ‘ es ECC_type : ata Re : fades toe oseuttiedl¥
oO High-Dielectric Constant Ceramic Capacitors ECK_type
ECR_type saceacgecteestt wbzss tewoads Peabenenees
Axial Lead Ceramic Capacitors ECB_type
Metalized Polyester Film Capacitors for Across the Line ECQ_EW_type
Aluminum Electrolytic Capacitors for Smoothing Circuit : ECES_type es
Multilayer Ceramic Chip Capacitors ECUV_type