Printed Wiring Board - Sheet Switch Section - Sony SPP-935 Service Manual

• Semiconductor Location
Ref. No. Location Ref. No. Location
Q10 B-4
D1 E-5
D2 E-5 Q11 D-4
D3 C-4 Q12 D-7
Q13 E-9
D4 D-6
D5 B-6 Q14 D-7
D6 C-8 Q15 D-13
D7 C-13 Q16 B-6
D8 B-10 Q17 D-7
D9 H-7 Q18 B-9
D10 D-13 Q19 D-11
D12 B-13 Q20 D-10
Q1 D-3 U1 B-6
Q2 B-2 U2 C-5
U3 C-9
Q4 A-3
Q5 B-5 U5 D-11
Q6 A-4 U6 D-11
U7 B-11
Q7 A-4
Q8 D-4 U11 C-12
Q9 C-3
5-12. PRINTED WIRING BOARD – SHEET SWITCH Section –
Note: SHEET SWITCH is mounted on the HAND MAIN Board (Side B).
: other layer pattern.
– 39 –
• IC Block Diagrams
U1 MC13156FB (HAND MAIN BOARD)
24 23 22 21 20 19 18 17
VEE1 25
LO EMIT 26
16 DEMOD
LO IN 27
15 QUAD COIL
VCC N/C 28
14 VCC N/C
VCC N/C 29
13 VCC N/C
VCC N/C 30
12 VCC N/C
RF IN1 31
BIAS BIAS
LIMITER 11 LIM DEC2
RF IN2 32 AMP
MIXER
IF AMP
10 LIM DEC1
9 LIM IN
2 3 5 6 7 8
1 4
U2 TB31202FN (HAND MAIN/BASE MAIN BOARD)
U4 IS93C66-3GR (T/R) (BASE MAIN BOARD)
(Page 38)
U1 MC13156DWR2 (BASE MAIN BOARD)
24 23 22 21 20 19 18 17 16 15
MIXER
BIAS
BIAS
IF AMP
1 2 3 4 5 6 7 8 9 10 11
16 15 14 13 12 11
SWITCH
L. OSC
PHASE
1/2
COMPARATOR
OUTPUT
1/2
1
PROGRAMABLE
BUF
––––––––
32, 33
DIVIDER
REFERENCE
DIVIDER
1
PROGRAMABLE
BUF
––––––––
32, 33 DIVIDER
PHASE
1/2
LOCK
COMPARATOR
DET
OUTPUT
3
1 2 4 5 6
8 7 6 5
EEPROM ARRAY
(256 × 16)
DUMMY
BIT
HIGH VOLTAGE 1 OF 256 R/W
DATA
GENERATOR DECODER AMPS REGISTER
(16 BITS)
WRITE ADDRESS
ENABLE REGISTER
INSTRUCTION
INSTRUCTION DECODE CONTROL &
REGISTER
CLOCK GENERATOR
(11 BITS)
1 2 3 4
– 40 –
SPP-935
14 13
LIMITER
AMP
12
10 9
BUF
CONTROL
CIRCUIT
7
8