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SLV-7700KME/7700KML
5-2. PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
THIS NOTE IS COMMON FOR WIRING BOARDS
AND SCHEMATIC DIAGRAMS
(In addition to this, the necessary note is printed in each block)
(For printed wiring boards)
• b: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Through hole is omitted.
• Circled numbers refer to waveforms.
• There are few cases that the part printed on diagram
isn't mounted in this model.
• Chip parts.
C
6
5
4
4
5
6
4
5
1
2
3
3
B
E
1
2
3
3
2
1
3
2
1
5
4
3
2
1
2
1
2
Transistor
Diode
(For schematic diagrams)
• All capacitors are in µF unless otherwise noted. pF : µ
µF. 50V or less are not indicated except for electrolytics
and tantalums.
• Chip resistors are 1/10W unless otherwise noted.
kΩ=1000Ω, MΩ=1000kΩ.
• Caution when replacing chip parts.
New parts must be attached after removal of chip.
Be careful not to heat the minus side of tantalum
3
capacitor, Because it is damaged by the heat.
• Some chip part will be indicated as follows.
1
Example
C541
22U
TA A
Kinds of capacitor
Temperature characteristics
External dimensions (mm)
• Constants of resistors, capacitors, ICs and etc with XX
indicate that they are not used.
In such cases, the unused circuits may be indicated.
• All variable and adjustable resistors have characteristic
curve B, unless otherwise noted.
• Signal name
XEDIT → EDIT
PB/XREC → PB/REC
• 2: non flammable resistor
• 1: fusible resistor
• C: panel designation
• U : B+ Line
• V : B– Line
• C: adjustment for repair.
• Circled numbers refer to waveforms.
• Readings are taken with a color-bar signal playback.
• Voltage are dc between ground and measurement points.
• Readings are taken with a digital multimeter (DC10MΩ).
• Voltage variations may be noted due to normal production
tolerances.
When indicating parts by reference number, please
include the board name.
5-3
CIRCUIT BOARDS LOCATION
CD-169
VCD MECHA
CONTROL, MPEG
LOADING CDM-14
(LOADING MOTOR)
IO-65
L452
(FRONT JACK)
10UH
2520
MB-77
KARAOKE DSP,
AUDIO I/O
TU-168
BD-21
(TUNER)
(RF AMP)
PS-418
(POWER SUPPLY)
HI-66
DISPLAY/FUNCTION
CONTROL
MA-303
VIDEO/AUDIO PROCESS,
MJ-92
SERVO/SYSTEM CONTROL
(MIC AMP)
SW-323
(FUNCTION SWITCH)
DRUM MOTOR
AC-101
(ACE HEAD)
CA-53
CAPSTAN MOTOR
(CAM MOTOR)
5-4
RP-233
(HEAD AMP)
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