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CX Series
Protection, Standby, and Power Up.
(The amplifier locks up or does not startup and shut off correctly)
Model CX4/4 T
Symptoms:
l
Amplifier does not come out of protect
-
Amplifier will not thermally protect
-
Muting delay
-
Pilot LED not working
-
Fan doesn’t work
Model CX6/6T & CX
12
/
12
T
Symptoms:
-
Amplifier does not come out of protect
*
Relay won’t turn on with normal operating amplifier
- No RED “PROTECT” LED
- No muting delay
l
No thermal shutdown
l
No DC protect
-
Shut off under signal
-
DC faults without current draw
l
Fan doesn’t work
CX4/4 T Possible Causes:
l
AMPLIFIER DOES NOT COME OUT OF PROTECT
1.
Q
50 or
Q51
shorted base
-
collector junction or collectoremitter junction.
2 .
Voltage on Z5 should be 14v
-
1.5
v
. If this voltage is low, check for leaky C51, C52, defective
D51, or open R5
1
/R54.
3. Check for open LD50 and PTCs R56, R57.
l
AMPLIFIER WILL NOT THERMALLY PROTECT (If “Muting” circuit is OK)
1. Check for shorted LD50 and PTCs R56,
incorrect R55, R53, or open R50.
l
MUTING DELAY
1. Excess muting delay (rest works OK): Check timing capacitor C51 voltage. If it rises normally
but circuit is slow to turn on, check D51.
2. No muting delay (rest works OK): R5
1
/R51 low
(
fast charge C51). Missing R53 or high.
l
PILOT LED NOT WORKING
1, Check for shorted or open pilot LD2 (CH
1
) or LD4 (CH2). Check R53
1/
R631.
l
FAN DOESN’T WORK
1. Always operate at high speed: check open PTC R50, defective U50, shorted
Q52.
2. Always operate at low speed: check shorted PTC R50, defective U50, Q52 shorted
base
,
emitter junction.
3. Doesn’t operate: missing R63 or high. Check voltage across fan terminal, should be 1 OV at
cold and 24V at hot. If voltage is OK, replace defective fan
Содержание CX Series
Страница 1: ...CX Series CX4 CX12 ...
Страница 2: ...CX Series CX4T CX1 2T ...
Страница 4: ......
Страница 6: ......
Страница 49: ...43 ...
Страница 50: ... CX Series 44 ...
Страница 51: ......
Страница 52: ...1 CX Series a 46 ...
Страница 53: ...1 I v 47 ...
Страница 54: ...CX Series 4a ...
Страница 55: ...CX Series ...
Страница 56: ...CX Series _ _____ i 50 ...
Страница 57: ... a C X S e r i e s t ...
Страница 59: ...CX Series ...
Страница 60: ...CX Series ...
Страница 61: ...H 5 5 ...
Страница 62: ...IWOHS A021 V X3 WVki3VlO ONMM xv LOmoo ix n3m osNvnl ...
Страница 64: ...I I oml ION om 104 I I INI I II kla 6waca SKDNNXXi3lM Nld Ol Nld IUM 3lm M36aRl6al mlm tl ...
Страница 65: ...CX Series 59 ...
Страница 66: ...CX Series 60 ...
Страница 67: ...CX Series i r ...
Страница 68: ...I I ____ d 62 ...
Страница 70: ...CX Series r 0 _________ a 64 ...
Страница 73: ... f 6 7 ...
Страница 74: ...L I CX Series 68 ...
Страница 75: ...1 I I 6 9 ...
Страница 80: ......
Страница 81: ......
Страница 82: ......
Страница 83: ......
Страница 84: ......
Страница 85: ......
Страница 86: ......
Страница 87: ...CX4 4T PCB Assemblies Component Side ...
Страница 88: ...C X 4 4 T P C B A s s e m b l i e s S o l d e r S i d e ...
Страница 90: ...CX6 6l 8 CXl2 12T Main Display Input PCB Assy Solder Side C 000944 00 REV A ...