Sony SPP-ID970 Service Manual page 37

SPP-ID970/ID971
SERVICE MANUAL
Ver 1.2 2000. 10
SUPPLEMENT-2
File this supplement with the service manual.
Subject : Change of Base Main Board
Printed wiring boards and schematic diagram of new type, and changed parts
list are described in this supplement-2.
Refer to original service manual (9-927-617-11) previously issued for the other
information.
When performing service and inspection, check the suffix of the part number of
the main, relay and display boards.
• DISCRIMINATION
- BASE MAIN BOARD (SIDE A) -
US Model
SPP-ID970
Canadian Model
SPP-ID971
(ECN-CPE00320)
U2001
BASE MAIN Board Part No.
Former type : 1-676-044-11
New type : 35-4510-05-00
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
For schematic diagrams
• 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.
• C : panel designation.
• U : B+ Line.
• Power voltage is dc 9 V and fed with regulated dc power
supply from external power voltage jack. (BASE UNIT)
• Power voltage is dc 12 V and fed with regulated dc power
supply from J1006 with 100 Ω in series. (BASE UNIT)
• Voltage is dc with respect to ground under no-signal
condition.
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
N
: TX (To Tel Line)
O
: RX (From Tel Line)
P
: bell
For printed wiring boards
• X : parts extracted from the component side.
• : Through hole.
z
• : Pattern from the side which enables seeing.
(The other layer's patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B) pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A) parts face are indicated.
– 2 –