Technics SH-4020 Service Manual

Mi DISASSEMBLY INSTRUCTIONS
How to remove the printed circuit board.
Remove the 2 setscrews (Fig. 1: @, @) of the cabinet.
Remove
the
1
setscrew
(Fig.
1:
@)
of
the
FL
bracket
and
move
the
FL
bracket
in
the
direction
of
the
arrow
®
in
Fig.
1.
Remove
the 3
setscrews
(Fig.
1:
@
~
@)
of
the
front
panel, and
move the
front
panel in
the
direction of
the
arrow
©
in
Fig. 1.
4. Remove the 3 setscrews (Fig. 2: @ ~ ©) of the printed circuit board.
(Raise the printed circuit board when repairing.)
Cy Rear panel
1) Be
SS Lift it up
S straight
NN
ei
Cabinet
Printed circuit board
os.
\\
Printed circuit
board
FL bracket
Fig. 1 Fig. 2
M@ REPLACEMENT PARTS LIST .... . Electrical Parts
Notes: 1. Parts numbers are indicated on most mechanical parts. Please this part number for parts orders.
2. Important safety notice:
Components identified by AA mark have special characteristics important for safety.
When replacing any of these components use only manufacturer's specified parts.
3. The ’’S”’ mark is service standerd parts and may differ from production parts.
4, Unless other wise specified.
All resistors are in OHMS(Q2 ), K=100082, M=1000k{2.
All capacitors are in MICROFARADS(u F), P=MHF.
INTEGRATED CIRCUIT TRANSFORMER
TRANSISTORS FLUORESCENT DISPLAY TUBE
2SA733—P1 Swiching es ee
FUSE
Fy
A|
XBAS2C025T1A|
250V,
T250mA
Fl1~14
A]
XBA2C63TRO
|
250V,
T630MA
[EG]
only
SWITCHES
S1
SSR175 Mode
RELAY
S234
SSGQ
Timer
Set
SVDSR1K2
Rectifier
RLY]
Al
ssysi
AC
Onin
S5,
6
SSH2007
AC
Outlet
SVDMZ406B
6V,
Zener
S7
ESD14116
Allocation
MA162A
Switching
(50/60Hz)
SVDMZ409B
QV, Zener
A|
ESE3787
Voltage Adjust
Numbering
System
of
Resistor
Numbering
System
of
Capacitor
Example Example
ERD
25
T
J
104
ECKD
1H
103
Z
F
Type
Wattage
Shape
Tolerance
Value
Type
Voltage
Value
Tolerance
Peculiarity
ECEA ie 5 101
Type Voltage Peculiarity use Value
eo ae en
RESISTORS
R1
ECEA : Electrolytic P : +100%, —O%
ECKD : Ceramic ; Z : +80%, —20%
CAPACITORS
ECKD1H1032F
ECEA1VS471
ECEA1ES101
ECKD1H1032ZF
A\| ECKDKC103PF
ERD25TJ104
ERD251.3333
ERD25FJ103
ERD25TJ563
R5

Technics SH-4020 Specifications

General

Brand	Technics
Model	SH-4020
Category	Timer
Language	English