Crown Audio 1200 service manual Output Assembly, Back Panel Assembly, Chassis Front Assembly

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Micro-Tech 1200 Amplifier Service Manual

Parts List (Non-Module)

OUTPUT ASSEMBLY (CONT.)
CPN	ITEM	QTY (ONE PER CHANNEL)
D 8774-8	PTC, 95 Deg. Thermal Sensor	1
F12019-0	Aluminum Heatsink Slug (under diodes on output mod)	1
C 8813-5	MPS8097/MPSA18 NPN Transistor (Q318/Q418)	1
B 5842-8	#23 Tubing for Q318/Q418 transistor leads	Order in inches
C 5826-0	LM-234Z-6 Thermal Sense (S100/S200)	1
B 5464-1	#24 Teflon Tubing for S100/S200	Order in inches
C 8573-5	2SA1186 Power Transistor, PNP Driver (TO3P)	2
C 8574-3	2SC2837 Power Transistor, NPN Driver (TO3P)	2
M20586-0	PNP Driver Transistor Assembly, TO220 (Old style)	2
M20587-8	NPN Driver Transistor Assembly, TO220 (Old style)	2
D 7665-9	Clip, TO3P Mounting	2
D 7666-7	Bracket, TO3P Heatsink	2
M21324-5	Aluminum Heatsink with fins	2
BACK PANEL ASSEMBLY
CPN	ITEM	QTY
M21208J9	MT Back Panel	1
F10787J3	Back Panel Cover Plate	1
D 7074-4	Power Cord (US Version)	1
A10793-0503B	Power Cord (European Version)	1
A10214-7	Strain Relief	1
C 2823-0	Dual Binding Post	2
D 7600-6	Dual Banana Ground Strap	1
CHASSIS FRONT ASSEMBLY
CPN	ITEM	QTY
C 6487-0	Power Switch, 2 Pole 22 Amp Rocker	1
D 8052J8	End Cap	2
A10031-1	8-32 x .060 Flush Captive Nut	4
A10090-70808	8-32 x .5 Oval Head Screw	4
F12435J7	Grill, Metal	1
D 6944-9	Air Filter	1
A10173-1	Grill Clip	3
A10101-5	Nylon Washer	3
A10090-70806	8-32 x .375 Oval Head Screw	3
M43380-1	Old Filter Housing Assembly (Plastic)	1
C 6614-9	Rubber Grommets used with old filter assembly	12
F12264J1	Front Panel Overlay "ODEP"	1
F10886A2	Old Front Panel Overlay "Supply"	1

To upgrade the old plastic filter assembly to the new metal style, a kit may be ordered using Crown part number M44077-2. This kit includes a new bottom cover.

MAIN CHASSIS ASSEMBLY
CPN	ITEM	QTY
D 8501-5	Cover, Top	1
D 8548-6	Cover, Bottom	1
	-Note: The old Style bottom cover used with
	the plastic grill is no longer available. You may
	upgrade to the new style by ordering the kit M44077-2.

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Contents MICRO-TECH-1200 Avis Table of Contents Warranty IntroductionScope Parts Information Specifications PowerVoltage Conversion Overview FeaturesTheory Front END OperationLast Voltage Amplifiers LVAs Voltage AmplificationGrounded Bridge Topology Voltage TranslatorsHigh Side HS Low Side LSOutput Device Emulation Protection Odep Positive Test 3 Odep Voltage Adjustment Electrical Checkout ProceduresTest 2 Output Bias Adjustment Standard Initial ConditionsTest 7 Phase Response Test 4 AC Power DrawTest 5 Common Mode Rejection Test 12 Output PowerTest 14 Odep Limiting Test 16 Signal to Noise RatioTest 13 Reactive Loads Test 15 LF ProtectionTest 20 Clipping Post TestingTest 19 Intermodulation Distortion Spec at 0 dB Output 0.01% Spec at -35 dB Output 0.05%Output Assembly ONE PER Channel Parts List Non-ModulePower Supply Supplimental ItemsChassis Front Assembly Output AssemblyBack Panel Assembly Main Chassis AssemblyParts List Non-Module Module and Schematic Information Fuse and Display Module Parts Lists Q42549-8 Output Module P10115-7 board Parts List Q42647-0 Output Module P10137-1 board Parts List Q42717-1 Output Module P10233-8 board Parts List Q42871-6 Output Module P10305-4 board Parts List Q42968-0 Output Module P10341-9 board Parts List Q43202-3 Output Module P10397-1 board Parts List Q42552A0 Main Module D6304A4/D6304B2 board Parts List Resistor NetworksIntegrated Circuits SwitchesConnectors Mounts U1, U2Q42714-8 Main Module D 6910-0 board Parts List Dpdt Q42776-7 Main Module D 7251-8 board Parts List OpenQ42776-7 Main Module D 7251-1 board Parts List HDR, 5 PIN Q42980-5 Main Module D7911-7 board Parts List Resistors DP3T Q43035-7 Main Module D7993-5 board Parts List NPN MPS8097Jumper IC’S Q43031-6 Main Module D7993-5 board Parts List Resistor Networks Switches