4-2
CIRCUIT BOARD NOTES
1. Foil and Component sides
1) Foil side (B side) :
Parts on the foil side seen from foil face (pattern face)
are indicated.
2) Component side (A side) :
Parts on the component side seen from component face
(parts face) indicated.
2. Parts location guides
Parts location are indicated by guide scale on the circuit board.
Note:
For general information in service manual, please refer
to the Service Manual of GENERAL INFORMATION Edi-
tion 4 No. 82054D (January 1994).
6. Signal path Symbols
The arrows indicate the signal path as follows.
Playback signal path
Playback and recording signal path
Recording signal path
(including E-E signal path)
Capstan servo path
Drum servo path
(Example)
R-Y
Y
Playback R-Y signal path
Recording Y signal path
7. Indication of the parts for adjustments
The parts for the adjustments are surrounded with the circle as
shown below.
8. Indication of the parts not mounted on the circuit board
“OPEN” is indicated by the parts not mounted on the circuit
board.
R216
OPEN
REF No.
LOCATION
IC
Category: IC
Horizontal “A” zone
Vertical “6” zone
B : Foil side
(A : Component side)
C : Chip component
(D : Discrete component)
IC101
B C
6A
