Service manual
CB251
W2251
CB231
CB232
W2152
W2153
W2154
CB233
IC233
IC236
IC237
IC232
CB252 CB254
CB257
CB256
CB182
W181
W182
CB181
CB258
CB234
CB235
IC238
IC181
IC183
A
1
2
3
4
5
6
7
8
9
10
BCDEFGH I JK
L MN
RX-V363/HTR-6130
80
★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
OPERATION 2/2
0
0
0
0
0
5.0
0
4.9
0
4.9
0
0
0
0
-4.8
-4.8
0
0
5.0
0
2.2
0
0
-5.5
-4.9
0
-5.6
-11.9
-11.9
5.0
0.1
0.1
0
0
-11.1
0
0
0
-4.8
0
4.9
0
0
3.6
0
5.0
0
4.9
4.9
5.0
0
0.7
0
0
0.7
0
0
0
3.6
3.3
3.3
3.3
3.3
0
9.5
4.2
0
3.3
7.2
0
0
0
1.0
3.3
4.5
0
18.4
-0.1
-0.1
-19.2
12.5
5.2
5.5
0
11.4
4.4
4.8
0
0
0
1.7
8.8
3.3
8.8
0
0
0
0
0
9.5
9.5
5.0
11.9
5.3
0
0
0
-11.9
0
0
8.8
1.7
18.4
18.4
12.5
4.5
11.4
-19.2
0
0
0
9.5
1.2
1.0
9.7
9.6
3.7
3.7
3.7
3.7
3.7
0
9.6
3.7
3.7
3.7
0
1.8
1.2
3.2
0
7.2
AC29.9
AC8.5
AC10.3
AC9.7
AC5.1
AC 9.3
IC233, 234, 239: KIA7805API
Voltage regulator
R1
R2
R3
R4
R5
R6
R7
R8
Z1
Q12
Q13
Q18
Q17
Q14
Q19
Q10
Q8
Q16
INPUT
OUTPUT
COMMON (GND)
Q15
Q11-1
Q11
Q2
Q3
Q4
Q5 Q9
Q7
Q1
Q6
R12
R19
R10
R9
R15
R14
R16
R21
R20
R22 R23R17
R13
R11
R18
C1
1
3
2
IC236: KIA7812API
Voltage regulator
R1
R2
R3
R4
R5
R6
R7
R8
Z1
Q12
Q13
Q18
Q17
Q14
Q19
Q10
Q8
Q16
INPUT
OUTPUT
COMMON (GND)
Q15
Q11-1
Q11
Q2
Q3
Q4
Q5 Q9
Q7
Q1
Q6
R12
R19
R10
R9
R15
R14
R16
R21
R20
R22 R23R17
R13
R11
R18
C1
1
3
2
COMMON (GND)
IC237: KIA7912PI
Voltage regulator
Q28 Q17
Q18
Q19
Q20
Q31
Q23
Q21
Q22 Q24
Q25
Q26 Q27
Q10
Q11
Q14
Q15
Q16
Q27-1
Q26-1
Q12 Q13
Q8
Q9
Q2
Q7
Q4
Q5
Q6
Q3
Q29
Q30
R0
R1
R2
R14
R17
R19
R20
R21
R22
R23
R24
R25
R26
R3
R4 R5 R6
R10
R11
R12R13
D4
R9
R7
R8
C2 C1
R16
R15 R18
1
OUTPUT
INPUT
3
2
IC232: NJM2388F33
Low dropout voltage regulator with ON/OFF control
GND
Cont
Vin
Vout
2
1
4
3
Thermal
Protection
Bandgap
Reference
ON/OFF
control
Over Voltage
Protection
Over Current
Protection
+
-
IC238: LM61CIZ
Temperature sensor
IC181: NJM2586AM
Wide band 3-input 1-output 3-circuit video amplifier
9
10
8
5
6
7
4
3
2
1
11
12
13
16
17
15
14
18
19
20
21
22
23
24
CH1 IN1
CH1 IN3
CH1 IN2
SW 1
SW 2
GND
CH1 OUT
CH2 OUT
CH3 IN2
CH3 IN3
V
+
2
V
-
2
V
-
1
CH2 IN3
CH2 IN1
CH3 OUT
CH3 IN1
GND
CH2 IN2
GND
PS
GNDGND
V
+
1
Bias Bias
Bias
Bias
Bias
Bias
Bias
Bias
Bias
Cont2
Cont2
Cont2
Cont1
Cont1
Cont1
75
Driver
75
Driver
75
Driver
6dB
Amp
6dB
Amp
6dB
Amp
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
Vout1
SW5
Vin5
SW3
Vin4
SW4
Vin3
V
-
V
+
Vout2
SW1
Vin1
GND
Vout3
SW2
Vin2
IC183: NJM2595M (TE1)
5-input 3-output video switch
Vin1
Vin2
Vin3
Vin4
Vin5
Vout3
Vout2
Vout1
SW5 SW4
SW5SW1SW2V
+
GND V
-
13
20k
20k
20k
20k
S3
S4
S1
S5
6dB
Amp
6dB
Amp
6dB
Amp
75Ω
Driver
75Ω
Driver
75Ω
Driver
20k
20k
20k
S6
S7
S2
9
7
5
3
46 128
11
15
1
2141016
OPERATION (3)
OPERATION (4)
OPERATION (2)
OPERATION (5)
R, L models
AC IN
COMPONENT VIDEO
VIDEO
MONITOR OUT DVR DTV/CBL DVD
RDS
To POWER TRANSFORMER
To POWER TRANSFORMER
To POWER TRANSFORMER
to MAIN (5)_W161
Page 82
E3
to HDMI_CB904
Page 83
M7
to DSP_CB504
(U, C models)
Page 77
A6
to DSP_CB516
Page 77
B7
to MAIN (1)_CB103
Page 81
I6
to HDMI_CB905
Page 83 I6
to OPERATION (1)_CB203
Page 79
J5
to MAIN (4)_CB193
Page 82
J4