Classé
CP-35
PREAMPLIFIER
SERVICE MANUAL
v 1.0
Index
Mechanical Assembly
PC Boards
Testing Procedures
Diagrams
3
17
30
33
CP-35
MECHANICAL
ASSEMBLY
Classé - 25
FACE PLATE ASSEMBLY
CP-35
2
1
E
UT
M
3
L1
BA
RE
RE
RE
RE
PE
TA
G4
G3
G2
G1
SE
LE
OR
CT
<
EL
OD
M
-3
CP
5
1 MS-2347 PHILIPS
2 L103XR03
3 L104XR02
Classé - 1
FACE PLATE ASSEMBLY
CP-35
TOP VIEW
1
2
3
SIDE VIEW 2
4
5
6
SIDE VIEW 1
1
2
3
4
5 L156XR01-S
6
Classé - 2
CHASSIS REAR VIEW
CP-35
1
2
7
8
9
3
5
4
10
6
1
2
3
4
5
6
7
8
9
10
Classé - 3
CHASSIS
CP-35
TOP VIEW
4
1
3
2
1
2
3
4
PLA CAPFR1
HDW #8 FLAT WASHER
BZO 8-32x3/4” BHCS
L101XR04
Classé - 6
PARTIAL ASSY
CP-35
TOP VIEW
1
2
3
4
AVR BO51XR02
AVR BO50XR03
AVR BO1CXR00
TRANSFORMER
Classé - 8
PHONO BOARD INSTALLATION
CP-35
1
2
SIDE VIEW
1
2
Classé - 8
SHIPPING AREA - FINAL ASSY
CP-35
1
2
M
L1
BA
E
UT
PE
TA
4
G
RE
G3
RE
G2
RE
OR
CT
LE
SE
1
G
RE
<
EL
OD
M
CP
-3
5
1 L102XR00
2
Classé - 9
CP-35
PC BOARDS
Classé - 25
B101XR03 MAINBOARD
CP-35
Classé - 10
B103XR02 FRONT PCB
CP-35
Classé - 11
B0F9XR02 PHONO
CP-35
Classé - 11
CP-35
TESTING
PROCEDURES
Classé - 25
Visually check all parts for: solder bridges or splashes, backwards, missing
components and component orientation.
START - UP
INSPECTION
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
Q9 => 7905
C42 => -12V
C44 => -15V
CP-35
Classé - 14
Q5 => 7915
C20 => -18V
C22 => -15V
FINAL TEST
CP-35
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 cosolder.
-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.
Classé - 15
CP-35
DIAGRAMS
Classé - 25
MAINBOARD - B101XR02 (1)
CP-35
Classé - 16
MAINBOARD - B101XR02 (2)
CP-35
Classé - 17
MAINBOARD PREAMP (LEFT) - B101XR02 (3)
CP-35
Classé - 18
MAINBOARD PREAMP (RIGHT) - B101XR02 (4)
CP-35
Classé - 19
PANEL - B103XR01
CP-35
Classé - 20
CP-35 Block Diagram
Single-ended Input
Selector
+
+
Pre-out
Volume
Control
Balanced Input
Balanced
Selector
Input
Balanced
To
Single-end
Conversion
Input
Selector
Gain Stage
CP35 MAIN BOARD
(B101XR03)
1. INSPECTION
a) Visually check all parts for: solder bridges or splashes, backwards,
missing components and component orientation.
2. Power supply voltages
a) Apply 30 VAC & check polarities
b) Apply 60 VAC check voltages
c) Apply 120 VAC
1. Q1→7805
CD3→ +12V
CD4 → +5V
2. Q2 → 7818
C9→ +26V
C11→ +18V
3. Q3→ 7918
C10→ -26V
C12 → -18V
4. Q4 →7815
C20→ -18V
C22→ -15V
5. Q5→ 7915
C20→ -18V
C22→ -15V
6. Q9→ 7905
C42→ -12V
C44 → -15V
7. Q8→ 7805
C43→ +5V
C41→ +12V
8. Q7→ 7912
C28→ -18V
C30→ -12V
9. Q6→ 7812
C27→ +18V
C29→ +12V
10. Tip 107→ Q102, Q202, Q302, Q402
a) C110, C210, C310, C40 → -18V
11. Tip 102→ Q101, Q102, Q201, Q301, Q401
a) C108, C208, C308, C408 +18V
12. 1C2→ OPA2134
C35→ +12V
C36→ -12V
13. 1C1→ OPA2134
C33→ +12V
C34→ -12V
14. 1C3→ OPA2134
C37→ +12V
C38 → -12V
15. 1C101→ OPA2134
C104→ +15V
C106→ -15V
16. 1C301→ OPA2134
C304→ +15V
C306→ -15V
17. Q103, Q203, Q303, Q403→ TL431
• Measure across capacitors:
a) C103, C203, C303, C403→ 2.5V
18. Bias voltages → 150MV to 200 MV
• Measure across resistors
a) R108, R107, R207, R208, R308, R307, R407, R408
19. Offset→ 10MV (+) or (-) maximum measure W/Respect to
GND.
T.P. lower pins on R109, R209, R309, R409
20. Offset on tape out → maximum (+)(-) 10MV
21. Check signals
CP-35 Display
(B103XR02)
1. INSPECTION
a) Visually check all parts for: solder bridges or splashes, backwards
or missing parts and component orientation.
b) Sockets on light bars must be 3 layers.
c) C3, R1, C18 are empty.
d) Check double side tape on the bottom of the socket.
2. FUNCTIONS
a)
b)
c)
d)
e)
•
•
f)
g)
h)
i)
Install micro chip→ CAP100 XC on U1 (install all red LED)
Plug on the unit.
Countdown from 20.0 to 0.00→ relay clicks.
REG1 LED lights.
Press < selector> switch up and down one at a time.
All LEDs must light one at a time.
Relay clicks every time you press selector switch.
Press tape switch relay clicks, LED lights.
Press mute, no click.
Check volume manually.
Check remote control – model 10 – if all functions are working.
Adjusting CP-35 Gain to Unity
1234-
Disconnect unit from the AC line and from the system
Remove the top cover
Locate and remove resistors R202 and R402
Locate and replace resistors R103 and R303 from the old value
(86.6 Kohms) to the new value of 21.5 Kohms
5- Replace the top cover and test unit.