Rotel RB-993 Service manual

Quality Uncompromised

Wiring Diagram

Technical

THREE-CHANNEL

POWER AMPLIFIER

Manual

Table of Contents

Specification.....................................1

Wiring Diagram ................................2

Parts List ..........................................3,4

Adjustment.......................................4

PCB Assembly .................................5,6

Schematic Diagram..........................7,8

Specification

Continuous Power Output (20-20 kHz, < 0.03%, 8 ohms) 200 watts/ch. Total Harmonic Distortion (20 Hz-20 kHz, 8 ohms) < 0.03% Intermodulation Distortion (60 Hz: 7 kHz, 4:1) < 0.03% Frequency Response (+0.5dB,-3dB) 15-100K Hz, Damping Factor (20-20,000 Hz, 8 ohms) 1000 Speaker Impedance (Normal mode) 4 ohms minimum Signal to Noise Ratio (IHF A network) 116 dB Input Impedance/Sensitivity 32 k Ohms/1.5 volt Power Requirements 115 Volts, 60 Hz or

230 Volts, 50 Hz Power Consumption 600 Watts Dimensions (W, H, D) 440 x 121 x 385 mm

173/8 x 43/4 x 153/16 in Weight (net) 18.3 kg, 40.3 lb

RB-993

BUNZAN-SHINSEN-BLD. 4F 10-10 SHINSEN-CHO, SHIBUYA-KU, TOKYO 150-0045, JAPAN

Serial. NO. Begining

Y-313A-98095C/S-S

Parts List

SYMBOL PARTS NO. DESCRIPTION SYMBOL PARTS NO. DESCRIPTION

X-1253-01 PCB ASSEMBLY

C101 041 50BGF4R7M CAP,ELEC.50V4.7UF C102 044 TFKP2-100V681H CAP,FILM 100V680PF C103 044 LFSC160V471H CAP,STYROL 160V470PF C104 044 LFSC160V221H CAP,STYROL 160V220PF C105 041 25BGF100M CAP,ELEC.25V100UF

C107 041 50BGF10M CAP,ELEC.50V10UF C108 044 LFSC160V331H CAP,STYROL 160V330PF C109 044 LS50V100PJ CAP,STYROL 50V100OF C110,111 041 25BGF100M CAP,ELEC.25V100UF C901,902 041 25BGF470M CAP,ELEC.25V470UF

D101-104 034 LT1N4148-86 DIODE D901,902 034 TRD16JST1 ZENER DIODE IC101 031 LNE5534AN IC Q101-103 033 LT2SC2362KAA-FG TRANSISTOR Q104-106 033 LT2SA1016KAA-FG TRANSISTOR

Q107 033 2SA1142-EPQ TRANSISTOR Q108 033 2SC2682-EPQ TRANSISTOR Q901 033 L2SD600K-EF TRANSISTOR Q902 033 L2SB631K-EF TRANSISTOR R101 054 LTMK2001KFECZ R,METAL 1% 1K

C113,114 044 LFSC160V561H CAP,STYROL 160V560PF C117,118 041 UVX2A102MRAY CAP,ELEC.100V1000UF C120 041 UTSS1E100-FB CAP,ELEC.25V10UF C121 041 UTSS1E221-FB CAP,ELEC.25V220UF C122 041 UTSS1H4R7-FB CAP,ELEC.50V4.7UF

C123 041 UTSS1E470-FB CAP,ELEC.25V47UF D105,106 034 LT1N4003-TB DIODE D107,108 034 LT1N4148-86 DIODE F101,102 036 5ST6.3 MINIFUSE 250V6.3A IC102 031 MPC1237HA IC

Q109 033 LT2SC2910AE-RST TRANSISTOR Q110 033 LT2SA1208AE-RST TRANSISTOR Q119 033 LT2SC2362KAA-FG TRANSISTOR Q120,121 033 LT2SA1016KAA-FG TRANSISTOR Q122 033 LT2SC2362KAA-FG TRANSISTOR

R123,124 054 LTMK2220RFECZ R,METAL 1% 220R R125 054 LTMK2001KFECZ R,METAL 1% 1K R126 054 LTMK2047RFECZ R,METAL 1% 47R R127-132 054 NIR2-0.22JF R,METAL 2W 0.22R R147 053 CR14-391J-A R,CARBON 390R

X-1254-01 PCB ASSEMBLY

SYMBOL PARTS NO. DESCRIPTION SYMBOL PARTS NO. DESCRIPTION

R908 054 1WS15KJF R,METAL1W15K TH901,902 034 SCK2R512

017 C-4401A01 SUB HEAT SINKER 019 TO-126 INSULATION SHEET

X-1254-05 PCB ASSEMBLY

C904 044 S001 061

Q111 033 L2SD1047-DE DRIVER TRANSISTOR

Q112 033 L2SB817-DE DRIVER TRANSISTOR Q113-115 033 2SC5200-OR POWER TRANSISTOR Q116-118 033 2SA1943-OR POWER TRANSISTOR Q123 032 L2SD1953 TRANSISTOR

DE7150F472M SPARK KILLER C-4176A07 POWER SWITCH

HEAT SINKER ASSEMBLY

019 TO-126 INSULATION SHEET

019 TO-3P INSULATION SHEET 201〜 SAME AS 101〜, 301〜SAME AS 102〜,

SURGE CURRENT THERMISTOR

011 FP-473 FRONT PANEL 011 RV4-02A03 H/S FRONT PANEL(L) 011 RV4-02A04 H/S FRONT PANEL(R) 012 RV4-09A00 PUSH KNOB 14F 014 RV3-07A00 UPPER COVER

015 RP-343 REAR CHASSIS 019 L4TSH-19#2 PLASTIC FOOT 022 T-1057U02 POWER TRANSFORMER 034 LBR254 POWER DIODE 063 A-0710W-15A BRAKER

072 L4TR-670#5 AC CORD for STD 072 LC-3763 AC CORD for AUSTRALIA 072 C-4572A01 AC CORD for UK 072 C-4573A01 AC CORD for CEE 081 RV4-17A00 INSIDE CARTON

081 Z-200 STYROL SIDE MOULDING

OTHERS

R102 054 LTMK2033KFECZ R,METAL 1% 33K R103 054 LTMK2470RFECZ R,METAL 1% 470R R104-107 054 LTMK201K5FECZ R,METAL 1% 1.5K R108 054 LTMK2560RFECZ R,METAL 1% 560R R109 054 LTMK2010RFECZ R,METAL 1% 10R

R110,111 054 LTMK2220RFECZ R,METAL 1% 220R R112 054 LTMK2047KFECZ R,METAL 1% 47K R113,114 054 LTMK2100RFECZ R,METAL 1% 100R R115 054 LTMK206K8FECZ R,METAL 1% 6.8K R116 054 LTMK203K9FECZ R,METAL 1% 3.9K

R118-121 054 LTMK2010KFECZ R,METAL 1% 10K R122 054 LTMK2033KFECZ R,METAL 1% 33K R133 054 LTMK2022KFECZ R,METAL 1% 22K R134 054 LTMF3300 R,METAL 330R R901,902 054 1WS2.2KJF R,METAL 1W 2.2K

R903,904 054 1WS5.6KJF R,METAL 1W 5.6K VR101 051 LVM6CKPV1S2.2K SEMI-FIXED RESISTOR

017 L4TR-2792#3 SUB HEAT SINKER 019 TO-126 INSULATION SHEET 066 L4TR-2487#4 1P PINJACK

066 C-4575A01 3P CANNON CONNECTOR

R148 053 CR14-223J-A R,CARBON 22K R149 053 CR14-122J-A R,CARBON 1.2K R150 053 CR14-153J-A R,CARBON 15K R151 053 CR14-561J-A R,CARBON 560R R152 053 CR14-333J-A R,CARBON 33K

R153 053 CR14-472J-A R,CARBON 4.7K R154 053 CR14-473J-A R,CARBON 47K R155,156 053 CR14-104J-A R,CARBON 100K R157 053 CR14-124J-A R,CARBON 120K R158 053 CR14-683J-A R,CARBON 68K

R159 053 CR14-153J-A R,CARBON 15K R160 053 CR14-473J-A R,CARBON 47K R161 054 1WS1.2KJF R,METAL 1W 1.2K R162 053 CR14-824J-A R,CARBON 820K R163 053 CR14-103J-A R,CARBON 10K

R164,165 054 2WS6.8KJF R,METAL 2W 6.8K R167 053 CR14-182J-A R,CARBON 1.8K RY101 063 DH24D2-OT(M) RELAY TH101 034 TTC-503 THERMISTOR

069 C-3417A FUSECLIP

069 C-4446A00 SCREW TERMINAL

Adjustment

Instruments : DC milli–voltmeter Notes : Prior to Bias Adjustment, run about 5minutes with rated output(8ohms) and

warm up Power Transistor and Heat Sink. Set input off.

Step

Coupling Location Adjust Location Adjust for

X-1253-01 PCB TP1

X-1254-01 PCB VR101

DC milli–voltmeter reads 7mV

X-1253-02 PCB TP2

X-1253-03 PCB TP3

X-1254-01 PCB VR201

X-1254-01 PCB VR301

X-1253-02 PCB ASSEMBLY

C906-909 041 ALS20S1024XX CAP,ELEC.80V15000UF

069 C-4446A00 SCREW TERMINAL

X-1253-03 PCB ASSEMBLY

C119 044 MKT18-100V104K CAP,FILM 100V0.1UF R166 054 2WS10JF R,METAL 2W 10R

067 4TR-3222 SPEAKER TERMINAL

X-1254-04 PCB ASSEMBLY

C903 041 UTES2A220-FB CAP,ELEC.100V22UF C910 041 UTES2A221-FA CAP,ELEC.100V220UF

D903,904 034 LT1N4003-TB DIODE Q903 033 L2SD600K-EF TRANSISTOR R905 054 2WS180JF R,METAL 2W 180R R906 053 CR14-562J-A R,CARBON 5.6K R907 053 CR14-822J-A R,CARBON 8.2K

2SA1016K 2SC2362K 2SA1208 2SC2910

2SA1142 2SC2682

2SB631K 2SD600K 2SD1953

NE5534AN 2SB817

2SD1047 2SA1943 2SC5200

MPC1237HA

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