Circuit Boards Location - Sony STR-DE245 Service Manual

Pin No. Pin Name I/O
51 REAR-RY O Control rear relay on/off
52 CTR-RY O Control center relay
53 FRONT-RY O Control speaker relay
54 H/P-RY O Control Headphone relay
55 WOOFER RY O Control Woofer relay
56 SYS.POWER I Detect power switch key
57 P115 —
58 P114 —
59 FUNC.MUTE O Control muting circuit
60 P112 —
61 SP SW I Read speaker switch comdition
62 P110 —
63 SET UP LED O Control Setup LED
64 NAME LED O Control Name LED
65 LEVEL LED O Control LEVEL LED
66 SURR LED O Control SURR LED
67 P103 —
68 S.FIELD LED O Control SF LED
69 B.B. LED O Control Bass Boost LED
70 P100 —
71 – 74 P97 – P94 —
75 – 78 S15 – S12 O Output signal to FL tube
79 VLOAD I Negative power supply
80 – 84 S11 – S7 —
85 – 90 S6 – S1 O Output signal to FL tube
91 – 100 DIG10 – DIG1 O Output signal to FL tube

3-4. CIRCUIT BOARDS LOCATION

SECONDARY board
PRIMARY board
POWER SWITCH board
HEADPHONE board
DISPLAY board
ENCODER board
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Description
STANDBY board
VOL-SEL board
VIDEO board
MAIN board
TUNING board
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)
For schematic diagrams.
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
1 / W or less unless otherwise
4
specified.
• % : indicates tolerance.
• : internal component.
f
• 2 : nonflammable resistor.
• 1 : fusible resistor.
• C : panel designation.
Note: Note:
The components identified by Les composants identifiés par
mark ! or dotted line with mark une marque ! sont critiques
! are critical for safety. pour la sécurité.
Replace only with part number Ne les remplacer que par une
specified. pièce portant le numéro spécifié.
• U : B+ Line.
• V : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
No mark : FM
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
J
: CD
g : VIDEO
I : PHONO
• Abbreviation
CND : Canadian model.
AUS : Australian model.
SP : Singapore model.
MY : Malaysia model.
AR : Argentine model.
CH : Chinese model.
MX : Mexican model.
CIS : Russian model.
EA : Saudi Arabia model.
EE : East European model.
9 9
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• : Through hole.
a
• : internal component.
f
• b : Pattern from the side which enables seeing.
C
Q These are omitted.
B E
B C E
These are omitted.
• Waveform
– MAIN SECTION –
1
IC1 qf
2.2Vp-p
230ns
– PANEL SECTION –
2
IC103 qa
5.0Vp-p
200ns