- 2 -
TUNER ADJUSTMENTS
Antenna
: 75
Ω
unbalanced, Modulation : 1 KHz
Dev. :
±
22.5kHz
RF Level
: dBuV EMF, Output Level : about 30mV at TP13, TP14, TP15
• Use a plastic screw driver for adjustments.
• TUNING
• MODE : TUNER
FM : 87.5 - 108MHz
• Speaker impedance : 4 ohm
AM : 522 - 1611kHz, 520 - 1610kHz
Anntena : IRE Loop(SG), Moduration : 1kHz, 30%
RF Level : dBuV EMF, Output Level : about 30mV at TP13, TP14, TP15
1. FM
Connection
Input
Output
Alignment voltage IC231
Alignment voltage IC231
3-22pin(TP24,25) is 0.0±0.05V
3-22pin is 0.0±0.05V
L2103
Connect Digital DC voltmeter to
87.5MHz
---
1.00±0.05V
---
TP11(H), TP12(E).
108.0MHz
---
5.50±0.50V Check Only
2. AM
Connection
Input
Output
Connect to VTVM
point TP13(L) or TP14(R) and TP15(E).
---
Connect Digital DC voltmeter to
522kHz
L2153
1.00±0.05V
---
TP11(H )and TP12(E).
1611kHz(XE)
---
7.10±0.50V Check Only
Connect to VTVM
603kHz
L2151
point TP13(L) or TP14(R) and TP15(E).
1404kHz
CT252
Remark
Remark
Step
Step
Adjusting
Circuit
Adjusting
Circuit
SG
Frequency
Cover
Voltage
2
Adjustment
XF233
3
FM Antenna SG=66dBuV/EMF
IF
Adjustment
Loop Ant
1
1
Tracking
Loop Ant
Cover
Voltage
2
Maximum
98MHz
450KHz
at 999kHz
T2002
Maximum
Adjustment
SG
Frequency
IF(0V)
Adjustment
E
E
E
E
E
E
E
1
12
13
24
13
24
12
1
1
E
CN400
CN445
Q4410
D4960
Q4963
Q4961
Q4960
Q4962
J4122
J4427
J4618
J4619
J4620
J4621
J4425
J4426
J4624
J4622
J4617
J4420
J4415
J4416
J4417
J4412
J4423
J4424
J4119
J4419
J4418
+5.6V
AC_SENSE
GND
LID_SW
MAIN_MUTE
TU_DI TU_CE
VOL_CE VOL_DO TU_DO D_CLK
CD_R
CD_AGND
CD_L
CD_DGND
ST_BY
+9.0V
SURROUND REC_OSC REC_MUTE BEAT_OUT
MOTOR PLUNGER REEL
INITIALIZE
DECK_PACK
G_FWD G_RVES
R4921
C4560
J4623
IC446
C4993
C4994
D4993
J4625
J4428
X2451
C2457
L2151
L2153
CT252
L2151
D2466
L2451
C2451
C2301
XF233
D2103
J2505
D2153
Q2451
J2511
J2510
XF221
XF222
C2321
C2305
C2328
C2327
C2307 C2317
T2002
J2501
C2303
J2601
J2509
J2606
J2605
J2604
J2120
J2603
J2112
C2901
D2451
TDI
TCLK
T-DOUT
TCE
D2151
J2600
D2456
C2116
XF231
+5.6V
L_CH
R_CH
+9.0V
GND
J2500
J2122
J2502
J2118
R2109
VT
J2503
CN202
CN201
S2001
XF211
IC211
J2124
J2123
C2306
J2119
J2121
J2100
L2104
D2102
L2103
C2311
C2313
J2113
J2114
J2504
J2117
J2127
J2126
J2125
J2102
J2103
J2104
J2116
J2107
D2452
C2452
J2111
J2110
J2109
J2108
J2106
J2105
J2602
J2508
J2507
D2101
L2102
J2506
D2453
J2101
Q2201
J2115
C2109
R4403
R4402
R4400
R4401
R4964
R4963
R4942
R4560
R4970
C4997C
4
9
9
7
C4997
IC241
IC231
C2461
R2460
R2459
C2456
C2456
R2453R
2
4
5
3
C2456
R2453
R2452
C2455
C2141
C2141
C2141
C2154
R2131
C2152C
2
1
5
2
R2151R
2
1
5
1
C2304C
2
3
0
4
R2302
R2302
C2115C
2
1
1
5
C2323
C2323
C2152
C2151
R2149
R2458
R2151
C2453
C2454
R2455
C2304
R2304
R2305R
2
3
0
5
R2306R
2
3
0
6
C2319
C2319
R2309
R2309
C2308C
2
3
0
8
C2310C
2
3
1
0
C2902C
2
9
0
2
R2305
R2306
C2320
C2319
C2309
C2316
R2307
R2309
R2308R
2
3
0
8
R2312R
2
3
1
2
R2308
C2308
C2324
C2315
C2310
C2312
R2302
R2454
R2148
C2902
R2801
R2701
R2301R
2
3
0
1
R2301
R2311
R2461
R2462
R2463
R2464
R2100
R2712
R2812
C2314
C2302
C2462
C2600
C2600
C2600
C2322
C2463
C2464
C2318
R2106
R2106
R2106
R2312
C2115
C2323
C2101
C2105
R2101
C2103
C2104
C2107
R2102
R2107
C2110
C2111
R2108
C2112
R2103
C2114
C2113
R2110
R2201
R2204
R2202
R2203
C2203
R2205
R2105
R2303
CT252
IC231
TP25
TP24
TP11
TP12
L2151
L2153
L2103
VT
T2002
XF233
TP15
TP13
TP14
CD PICK-UP MAINTENANCE
About pick-up (Optical lens) Cleaning
Clean a lens with swab of the cotton which moistened it with alcohol, cleaning paper or cleaning disc appointed.
Specified cleaning disc : LC-1 (Part code : 645 026 1961 ..... manufactured by SANYO.)
Show a clean procedure in the following in reference by swab of cotton.
1. Cotton swab is wrapped with Cleaning paper.
2. Add the isopropyl alcohol.
3. Gently move the tip of cotton swab just like a draw a whirlpool from inside to outside on the surface of lens.
