Tuner Adjustment - Sanyo DC-TS765KR Service Manual

TUNER ADJUSTMENTS
• Use a plastic screw driver for adjustments.
SG RF Level : 75Ω open Voltage dBµV
Antenna : 75Ω unbalanced Direct, Modulation
: ±22.5kHz(MONO) , ±22.5kHz(STEREO) , ±6.75kHz(PILOT)
Dev.
Output Level : about 100mV at TP13,TP14,TP15
L2101
2 J J20 1 2001 00
D2101 D 10 D2101 0 0 1 01 0 01 01
R2 R R2102 02 R2 R21 21 21 10
C C C2 3 C2 2 13 3 C213 C213 C2 0 3 2130 30
R R 210 R2 2 104 R210 R R 0 R2 2 10 R R 0
C212 C 2 C 126 C2 C2 C 12 C 2 C212
C2102 C 02 C 0 C 10 C21 C210 C210 C 0 C 10
C2104 C C 04 C2 C2104 4
1 1 1 1 1 1 1
C2123 C21 C 123 C 2 C212 C212 C212 C 2 21
C2 21 C 2 C212 C 2 12 C C21 C2 2 2121 212 212
D210 0 4 4 04 4 04
C211 C211 1 2 C2 2
I IC C 1 1 1 I IC211 C2 2 C C 2 C2 2 C C 211
R2 1 R2111 111 1 1
J J2003 3 J2003 2003
XF211 XF211 XF211
C 131 3 C213 C213 C C 2 C213 3 C C C 2
B2101 B2101 B 210
R R 2153 R 5 R2 5 5 R2153
C C CN20 CN203 CN203 03
C2 C2 C2 C C 2 C2 C2 C C 2 152 2 52 2 2 152 152 2 152 52
CN CN202 CN202 N202 2 2 2 2 2 2 2 2 2 2
L2151
J2008
L2151 TP11 TP12
TP12
(GND)
1 . F M
S t e p Adjusting
Circuit
1 IF Alignment
SG=66dBµV
2 Cover
voltage
3 Tracking Connect FM SG to FM Antenna
(SG= about 8dBµV)
2 . A M
S t e p Adjusting
Circuit
IF Alignment Loop Ant.
1
2 Cover
voltage
3 Tracking Connect AM SG to
Test loop Ant.
(SG= About 80dBµV)
: 1 kHz
L2102
C C231 1 C2 C C 231 31 C2314 4 4
R2114 4 R R 211 R211 R 1 R211
C C C C C 2117 7 C2 C2117 17 7 7 7
J2041 J204 041 J
D2102 21 2102
J2121 J2121 1 1 212 12
R R R R R R R R R 211 1 211 11 112
R210 0 R 0 R2103 0 R 0 C2107 R210 R210 0 0 C21 C 0 C210 C 0 C 0 C 0 C 07 C21
L21 1 0 0 2 L2102 L
J2 2 022 20 20 2022 2
C23 8 C 2318 3 8 8 8
C2 C C C 230 0 0 C C C C 2 C2 C C C 30 C 23 3 0 2308 08 08 23 2 R2309 R 2 30
C23 23 3 C2317 C2317 7 C2 2 2 C 17 7 1 1 31 1 3 7 7 1 1 7 17 1 1 7 7
J J 0 J2004 004
C2313 C2313 C2313 3 3 C IC 3 IC231 IC231 C C2 C C2 C2 1 31 3 C2 3 1
LA1844 4 4 L LA184 A A 8 1 1 8 4
R2101 R210 R210 R210 R 101 1
J20 J2005 J J 200
J2007 J J 2007 7
R 3 R2 2 3 3 R2 R23 23 3 R2 23 3 03 0 0 0 0 0
2153 153 15
C2 C C C 23 2 2302 2 3 2 02 2
C2113
J2229
J2009
XF231
J2028 J202 J2028 J2 J J J J
TP24 XF231 IC231
TP25
Connection
I n p u t O u t p u t
FM ANT. IC231 3,22pin
TP24, TP25
---
Connect Digital DC voltmeter
to TP11(H), TP12(E).
---
Connect to VTVM
TP13(L) or TP14(R), TP15(E)
Connection
I n p u t O u t p u t
IC231 19pin(DCCUT)
TP26(GND)
---
Connect Digital DC voltmeter
toTP11(H), TP12(E).
---
Connect to VTVM
TP13(L) or TP14(R), TP15(E).
J2141 1 J214 J214 4 1 J214 21
R246 R246 R246 R 6 R2460 60 R 6
J2 J 1 2 4 J2142 21
IC241 C2 C C C C 1 4 C24 4 1 1 2
LC72121 L L C 2 7 7 21 2
C2453 C2 C C C C C C C 2453 453 3 453 453 3 3 3
IC241 IC2 IC24 IC
E E
Q2451 Q2 Q24 4 5 45
C2 2 2 C C C C 2 2452 4 2
C C C C C C 5 456 C C 24 4 5 C C 24 4 5 C C2 C C 245 C2 6 6 6 5 5 5 5 5 5 5 5
9 9
J202 J2024 J 2024 4
J J J2025 J 02 5 5
R2305 R2 R2305 R 0 R R R R R R 2305 R 5 5 5 5
R 304 4 R230 0 4 R2304 R2 R R R 3 4 R 304 4 4 4 4
C2 C C C 23 3 3 C2 C C C 23 23 2330 33 330 0
C 328 C2328 C 32 2 8
C2 C2 C2 2306 2306 2306 C2327
XF233
S G
Frequency
98.0MHz
87.5MHz
108.0MHz
90.0MHz
106.0MHz
S G
Frequency
522kHz
522kHz
1710 kHz
603kHz
1404kHz
- 13 -
TP15 TP13 TP14
J224 J224 J 2 2 41
C2 C290 C2 C 0 C 0 C2
C 6 C2463 3 C246 C 6 C246 C2 2 46 246 2463
CN241 CN241
J2 2 14 J J 21 J2143
J2 2 14 J2144 44 J2144 144
C2461 C2461 C2461 C C C 46 46 1 1 1 D2451
C246 6 2 246 6 2 2 2
J2 45 J J J 2145 21 145 5
J J2044 J2044 204 4 4 4 4 4
L2451 L L 2451
R 6 R2464 64 4 R246 R246 R 6 R246
J2048 J 0 8 8 8 J 0
J J2261 261
C2901 1
J J2061 J2061 J206 6 1
J2161
R2 R271 R271 R R 271 R2711 1 R 1 R2
RCH RCH RCH RCH
L2503 L 50 L25 5 03 3
328
C2 C C2902 C C 290 0 2 C2 290 0 2 2 2 2 2
J20 3 J 2063 3 J2 J2064 J2064 J 064 64 4
LCH LCH L
S e t Adjustment
Position
--- XF233
Low
L2102
High
Low
L2101
High
S e t Adjustment
Position
XF231
Low ---
High ---
Low
L2151-a
High
290 29 9 0 2903 903
Remark
0.0 ± 0.05V
Alignment voltage is
more than 0.8V.
Confirm voltage is less
than 9.0V.
Max.
Remark
more than 0.8V
less than 9.0V
Max.