CA-201-EU SERVICE MANUAL v1_0
Classé
CA-201
POWER AMPLIFIER
SERVICE MANUAL
v 1.0
Index
Mechanical Assembly
PC Boards
Testing Procedures
Diagrams
3
18
26
29
CA-201
MECHANICAL
ASSEMBLY
Classé - 3
FACE PLATE ASSEMBLY
CA-201
CA-201
5
1
2
3
4
1
2
3
4
5
HDW SPAENAUR R3100-31(Retaining Ring)
DDM BUSHR1 (Plastic Bushing)
HDW 94369 (Spring)
DDM PSWL1 (Power Switch Knob)
L033XR01
Classé - 4
FACE PLATE ASSEMBLY
CA-201
1
2
3
SIDE VIEW
1 MPFU-0804
2 L02CXR02
3 L033XR01
Classé - 5
FACE PLATE ASSEMBLY
CA-201
2
1
1 L034XR01
2 B-336
Classé - 6
FACE PLATE ASSEMBLY
CA-201
1
3
2
1 HEATSINK
2 SS-185
3 N-281
Classé - 7
HEATSINK ASSEMBLY
CA-201
2
1
SIDE VIEW
1 8-32X1/2 BHCS
2 L031XR07
Classé - 8
CHASSIS REAR VIEW
CA-201
9
3
8
7
4
5
1
6
2
1
2
3
4
5
NEU NC3FPB-1
BZO 4-40x3/8” FHCS
FUSE PLASTIC NUT
FUSE RUBBER GASKET
FUSE HOLDER
6
7
8
9
BZO 6-32x3/8” BHCS
SWI EAC-310
HDW #6 LK WASHER
HDW 6-32 NUT
Classé - 9
CHASSIS REAR VIEW
1
CA-201
2
3
4
5
6
7
9
8
1
2
3
4
5
6
7
8
9
RCA NUT
RCA GROUND LUG
RCA FLAT PLASTIC WASHER
RCA SHOULDER PLASTIC WASHER
A/D AD3505FP (RCA jack)
BINDING POST
B. POST SPACER
B. POST WASHER
B. POST NUTS
Classé - 10
HEATSINK
CA-201
2
3
TOP VIEW
4
5
6
1
1
2
3
4
5
6
L038XR02
L036XR01
L037XR03
L036XR01
1740.
10-32X1/2 BHCS
FRONT VIEW
Classé - 11
“L” BAR
CA-201
1
2
3
10
9
4
5
6
7
SIDE VIEW
8
TOP VIEW
1
2
3
4
5
MS-2147
W-311
TRANSISTOR
K4-04
L038XR02
6 3104.
7 B032XR05
8 727.
9 MPS2222
10 DELTA BOND (blue glue)
Classé - 12
CHASSIS
CA-201
TOP VIEW
4
1
3
2
1
2
3
4
PLA CAPFR1
HDW #8 FLAT WASHER
BZO 8-32x3/4” BHCS
L031XR07
Classé - 13
PARTIAL ASSEMBLY
CA-201
1
3
2
4
1
2
3
4
B035X
B032X
B037X
B01CX
Classé - 14
PARTIAL ASSY
CA-201
1
2
3
1 B036X
2 6689-X0-03
3 T-P 5.5
Classé - 15
PARTIAL ASSEMBLY
1
CA-201
2
3
1 L03CXR00
2 N-280
3 SS-185
Classé - 16
SHIPPING AREA - FINAL ASSY
CA-201
2
1
1 HX-2003
2 L032XR03
Classé - 17
CA-201
PC BOARDS
Classé - 18
B036XR03 CAPACITOR
CA-201
Classé - 19
B037XR05 CONTROL
CA-201
Classé - 20
B035XR02 INPUT
CA-201
Classé - 21
B034XR06 TOGGLE
CA-201
Classé - 22
B032XR05 DEVICE (X2)
CA-201
Classé - 23
B033XR05 MAINBOARD
CA-201
Classé - 24
B01CXR00 POWER SWITCH
CA-201
Classé - 25
CA-201
TESTING
PROCEDURES
Classé - 26
START - UP
1. Check all mechanical and electronic components.
2. Check all wires position.
3. Connect the jumpers and/or wires for 120 volt.
4. Turn the bias trimpot all way down. (bias = o v)
5. Connect the unit in bypass mode.
6. Connect the unit with variable transformer.
CA-201
1. Apply 10v A.C. from variable transformer and measure the rail and driver
voltage. If this voltage is not ok then turn off the unit and the recheck the unit.
2. If the rail and driver voltage ok the increase the line voltage and check rail and
driver voltage up to line voltage was 120v.
3. Then remove bypass mode.
4. Turn on unit and check the rails, drivers and offset voltages for all channels.
Also check the sequence of relay clicking. NEXT 119
5. Adjust the bias and offset. (Some unit bias is fixed.)
6. Check the voltage for relays and other supply voltage.
7. Check protection circuit for all channels.
8. Check IR (in/out) and/or phone jack.
9. Connect the load and input signal. Check the output and measure the power
with 4^ and 8^ load for all following condition:
Regular stereo
Regular mono
Balance stereo
Balance mono
10. In the end check bias + offset again.
11. Check noise.
12. Put the unit on burn-in bench.
Classé - 27
FINAL TEST
CA-201
1.
Before final test unit was 4 days on burn-in-bench with music.
2.
Take the unit from burn-in-bench to Q.C and play it immediately. Keep the line
120V A.C.
3.
Check physically and check the components.
-Check all capacitor and devices direction. Capacitor stand up right way i.e.
check co-solder.
-check any missing parts.
-check all fuse sockets.
-check main board tight up with screw and washer.
-check any screw missing.
-check balance lock working smoothly.
-check all output transistors position with pad.
-check main transistors position with pad.
-check main transformer tight very well.
4.
Adjust bias 26mV for every output devices for both channels. Wait 7 to 8 minutes
after each adjustment. Also adjust offset to 0mV.
5.
Measure rail and pre-driver voltage.
6.
Measure A.C voltage for bridge.
7.
Measure supply voltage for relays. +15V and 15V for both channels. +12V and
12V.
8.
Measure reference voltage 8.1V on both channels.
9.
Measure reference voltage for protection 78V.
10. After setting the bias, connect load and input signal. Check output signal. Check
phase with input signal.
11. Measure frequency response, slew rate, gain, signal to noise ratio.
12. Check the output signal from 20Hz to 20KH with load in following combination.
Also measure the output power.
Regegur-stereo
Balance-stereo
Regegur-mono
Balance-mono
Check phone-jack.
Check protection on both channels.
Check noise with speaker.
Put the jumpers and varistor for required A.C voltage.
Plug unit again and check rail and pre-driver voltage.
13.
14.
15.
16.
17.
Classé - 28
CA-201
DIAGRAMS
Classé - 29
CONTROLLER - B037XR05 (1)
CA-201
Classé - 30
CONTROLLER - B037XR05 (2)
CA-201
Classé - 31
CONTROLLER - B037XR05 (3)
CA-201
Classé - 32
CONTROLLER - B037XR05 (4)
CA-201
Classé - 33
CAPACITOR - B036XR03
CA-201
Classé - 34
GAIN STAGE - B033XR05
CA-201
Classé - 35
DEVICES - B032XR03
CA-201
Classé - 36
INPUT - B035XR02
CA-201
Classé - 37
TOGGLE SWITCH - B034XR06
CA-201
Classé - 38
POWER SWITCH - B01CXR00
CA-201
Classé - 39
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