Classe Audio CP-35 User manual

CP-35
Classé
PREAMPLIFIER
SERVICE MANUAL
v 1.0

Index
Mechanical Assembly 3
PC Boards 17
Testing Procedures 30
Diagrams 33

CP-35
MECHANICAL
ASSEMBLY
Classé - 25

1 MS-2347 PHILIPS
2 L103XR03
3 L104XR02
CP-35
FACE PLATE ASSEMBLY
Classé - 1
MODEL CP-35
<SELECTOR
REG1 REG2 REG3
TAPE MUTE
BAL1
REG4
3
1
2

FACE PLATE ASSEMBLY
1
2
3
4
5 L156XR01-S
6
Classé - 2
CP-35
4
5
6
12
3
TOP VIEW
SIDE VIEW 1
SIDE VIEW 2

CHASSIS REAR VIEW
1
2
3
4
5
6
7
8
9
10
10
9
7
8
3
4
Classé - 3
5
6
CP-35
1
2

CHASSIS
1 PLA CAPFR1
2 HDW #8 FLAT WASHER
3 BZO 8-32x3/4” BHCS
4 L101XR04
Classé - 6
CP-35
1
2
3
4
TOP VIEW

Classé - 8
PARTIAL ASSY
1 AVR BO51XR02
2 AVR BO50XR03
3 AVR BO1CXR00
4 TRANSFORMER
CP-35
TOP VIEW

Classé - 8
PHONO BOARD INSTALLATION
1
2
CP-35
SIDE VIEW
1
2

SHIPPING AREA - FINAL ASSY
1 L102XR00
2
Classé - 9
MODELCP-35
<SELECTOR
REG1REG2 REG3
TAPEMUTE
BAL1
REG4
CP-35
2
1

CP-35
PC BOARDS
Classé - 25

B101XR03 MAINBOARD
Classé - 10
CP-35

B103XR02 FRONT PCB
Classé - 11
CP-35

B0F9XR02 PHONO
Classé - 11
CP-35

CP-35
TESTING
PROCEDURES
Classé - 25

Classé - 14
START - UP
INSPECTION
Visually check all parts for: solder bridges or splashes, backwards, missing
components and component orientation.
Power supply voltages
Apply 30 VAC & check polarities
Apply 60 VAC check voltages
Apply 120 VAC
Q1 => 7805
CD3 => +12V
CD4 => +5V
Q2 => 7818
C9 => +26V
C11 => +18V
Q3 => 7918
C10 => -26V
C12 => -18V
Q4 => 7815
C20 => -18V
C22 => -15V
Q5 => 7915
C20 => -18V
C22 => -15V
Q9 => 7905
C42 => -12V
C44 => -15V
Q8 => 7805
C43 => +5V
C41 => +12V
Q7 => 7912
C28 => -18V
C30 => -12V
Q6 => 7812
C27 => +18V
C29 => +12V
Tip 107 => Q102, Q202, Q302, Q402
C110, C210, C310, C40 => -18V
Tip 102 => Q101, Q102, Q201, Q301, Q401
C108, C208, C308, C408 +18V
1C2 => OPA2134
C35 => +12V
C36 => -12V
1C1 => OPA2134
C33 => +12V
C34 => -12V
1C3 => OPA2134
C37 => +12V
C38 => -12V
1C101 => OPA2134
C104 => +15V
C106 => -15V
1C301 => OPA2134
C304 => +15V
C306 => -15V
Q103, Q203, Q303, Q403 => TL431
Measure across capacitors:
C103, C203, C303, C403 => 2.5V
Bias voltages => 150mV to 200 mV
Measure across resistors
R108, R107, R207, R208, R308, R307, R407, R408
Offset => 10mV (+) or (-) maximum measure W/Respect to GND.
T.P. lower pins on R109, R209, R309, R409
Offset on tape out => maximum (+)(-) 10mV
Check signals
CP-35

CP-35
FINAL TEST
Classé - 15
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
13. Check phone-jack.
14. Check protection on both channels.
15. Check noise with speaker.
16. Put the jumpers and varistor for required A.C voltage.
17. Plug unit again and check rail and pre-driver voltage.

CP-35
DIAGRAMS
Classé - 25

MAINBOARD - B101XR02 (1)
Classé - 16
CP-35

Classé - 17
CP-35
MAINBOARD - B101XR02 (2)